CN110304673B - Control method and control device for water purifier and water purifier - Google Patents
Control method and control device for water purifier and water purifier Download PDFInfo
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- CN110304673B CN110304673B CN201910731435.6A CN201910731435A CN110304673B CN 110304673 B CN110304673 B CN 110304673B CN 201910731435 A CN201910731435 A CN 201910731435A CN 110304673 B CN110304673 B CN 110304673B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 231
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000002351 wastewater Substances 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims description 40
- 238000004146 energy storage Methods 0.000 claims description 26
- 238000001223 reverse osmosis Methods 0.000 claims description 20
- 239000002699 waste material Substances 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to the field of water purifier control, and discloses a control method and a control device for a water purifier and the water purifier. The method comprises the steps of obtaining the rotating step number of a rotating stepping motor by determining the power failure of the water purifier, determining the rotating position of the stepping motor according to the rotating step number, determining the power-on of the water purifier again, and finally controlling the operation of the stepping motor according to the rotating position. Therefore, the problem that the stepping motor which drives the adjustable waste water valve generates heat when the water purifier is powered off and powered on frequently in non-effective operation is solved, and the working reliability of the water purifier is improved.
Description
Technical Field
The invention relates to the field of water purifier control, in particular to a control method and a control device for a water purifier and the water purifier.
Background
An adjustable waste water valve currently used in a water purifier is used to adjust the discharge amount of waste water, thereby determining an appropriate discharge amount of waste water according to the quality of water in an installation area of the water purifier, thereby saving water resources. During the use process of the adjustable waste water valve, if some ineffective operations such as frequent power failure and power up occur, the motor for driving the waste water valve body can be overheated when the waste water valve is powered up, and therefore the service life of the motor is shortened.
Disclosure of Invention
An object of the present invention is to overcome the above problems in the prior art and to provide a control method, a control apparatus and a water purifier for a water purifier.
In order to achieve the above object, an aspect of the present invention provides a control method for a water purifier including an adjustable waste water valve including a valve body and a stepping motor, the control method comprising:
determining the power failure of the water purifier;
acquiring the number of rotating steps of the rotating stepping motor;
determining the rotation position of the stepping motor according to the rotation steps;
determining that the water purifier is powered on again; and
and controlling the stepping motor to operate according to the rotating position.
Optionally, determining the rotational position of the stepper motor from the number of rotational steps comprises:
controlling the backspacing rotation steps of the stepping motor; and
determining the rotation position of the stepping motor;
controlling the operation of the stepping motor according to the rotation position comprises: and controlling the stepping motor to operate again according to the rotating position.
Optionally, determining the rotational position of the stepper motor from the number of rotational steps comprises: storing the number of the rotating steps; and
controlling the operation of the stepping motor according to the rotation position comprises: and restoring and controlling the stepping motor to operate based on the stored rotation step number.
Optionally, the control method further includes:
detecting the water quality before the water inlet of a reverse osmosis filter element of the water purifier;
determining the preset rotation steps according to the water quality condition; and
and controlling the stepping motor to rotate for a preset number of rotation steps.
In still another aspect of the present invention, there is provided a control apparatus for a water purifier, the adjustable waste water valve including a valve body and a stepping motor, the control apparatus comprising:
an energy storage device configured to be charged if the water purifier is powered on and to power at least the processor if the water purifier is powered off;
a power supply state detection device configured to detect a power supply state of the water purifier;
a processor configured to:
receiving a power supply state from a power supply state detection device;
determining the power failure of the water purifier according to the power supply state;
acquiring the number of rotating steps of the rotating stepping motor;
determining the rotation position of the stepping motor according to the rotation steps;
determining that the water purifier is powered on again according to the power supply state; and
and controlling the stepping motor to operate according to the rotating position.
Optionally, the processor is further configured to:
controlling the backspacing rotation steps of the stepping motor;
determining the rotation position of the stepping motor;
and under the condition that the water purifier is determined to be powered on again according to the power supply state, the stepping motor is controlled to operate again according to the rotating position.
Optionally, the control device further comprises:
a memory;
the processor is further configured to: storing the number of rotation steps in a memory; and under the condition that the water purifier is determined to be powered on again according to the power supply state, the operation of the stepping motor is controlled to be recovered based on the stored rotation step number.
Optionally, the processor is further configured to: when the water purifier is powered on, the stepping motor is controlled to operate in a delayed mode.
Optionally, the control device further comprises:
a current or voltage detection device configured to detect a charging current or charging voltage of the energy storage device;
the processor is further configured to: receiving a detected charging current or charging voltage from a current or voltage detection device; and controlling the stepping motor to operate only when the charging current or the charging voltage reaches a preset charging current threshold or a preset charging voltage threshold.
Optionally, the control device further comprises: a water quality detection device configured to detect water quality before an inlet of a reverse osmosis filter element of the water purifier; the processor is further configured to: receiving the detected water quality from a water quality detection device; determining the preset rotation steps according to the water quality condition; and controlling the stepping motor to rotate for a predetermined number of rotation steps.
Still another aspect of the present invention provides a water purifier including:
the adjustable waste water valve comprises a valve body and a stepping motor for driving the valve body;
the control device for the adjustable waste water valve of the water purifier.
According to the technical scheme, the control method for the water purifier obtains the rotating steps of the rotating stepping motor by determining the power failure of the water purifier, determines the rotating position of the stepping motor according to the rotating steps, determines the power-on of the water purifier again, and finally controls the operation of the stepping motor according to the rotating position. Therefore, the problem that the stepping motor which drives the adjustable waste water valve generates heat when the water purifier is powered off and powered on frequently in non-effective operation is solved, and the working reliability of the water purifier is improved.
Drawings
Fig. 1 schematically shows a system architecture diagram of a water purifier;
fig. 2 schematically shows a flowchart of a control method of the water purifier based on the above;
FIG. 3 is a flow chart schematically illustrating determining a rotational position of a stepper motor based on a number of rotational steps according to an embodiment of the present invention;
FIG. 4 schematically illustrates a flow chart for controlling the operation of a stepper motor according to an embodiment of the present invention;
fig. 5 schematically shows a block diagram of a control device for an adjustable valve of a water purifier according to an embodiment of the present invention;
fig. 6 is a block diagram schematically showing a control apparatus of an adjustable valve for a water purifier according to another embodiment of the present invention;
fig. 7 is a block diagram schematically illustrating a control apparatus for an adjustable valve of a water purifier according to still another embodiment of the present invention; and
fig. 8 schematically shows another block diagram of a control apparatus for an adjustable valve of a water purifier according to still another embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
The embodiment of the present invention first provides a control method for a water purifier, and fig. 1 schematically shows a system architecture diagram of the water purifier, which includes a booster pump 120, a reverse osmosis filter element 110 and an adjustable waste water valve 130, wherein the booster pump 120 is disposed at a water inlet end of the reverse osmosis filter element 110 to supply water at a high pressure to the reverse osmosis filter element 110, the adjustable waste water valve 130 is disposed at a waste water outlet of the reverse osmosis filter element 110, the water inlet end of the booster pump 120 is connected to a water inlet pipe 160, a pure water outlet of the reverse osmosis filter element 110 is connected to a purified water pipe 140, and an outlet of the adjustable waste water valve 130 is connected to a waste water pipe 150. Fig. 1 only shows the basic system architecture of the water purifier, and the water purifier may further include other filter elements connected to the water inlet pipe, such as PP cotton, a front activated carbon filter element, a rear activated carbon filter element connected to the water outlet pipe, and so on, which are not described herein again.
The adjustable waste water valve 130 comprises a valve body and a stepping motor, the valve body comprises a valve body inner core communicating cavity, a water inlet and a plurality of water outlets, the water inlet and the water outlets are communicated through the valve body inner core communicating cavity, each water outlet has corresponding different flow rates, and the different water outlets are communicated through the valve body inner core communicating cavity, so that multi-gear adjustment of water flow is realized. For example, the adjustable waste valve 130 has one inlet and three outlets, i.e., one water inlet and three water outlets, and has one inlet and four outlets, i.e., one water inlet and four water outlets. The valve body inner core communicating cavity is driven by the stepping motor to rotate, and when the stepping motor rotates to a proper step number, the valve body inner core communicating cavity is communicated with the water inlet and one of the water outlets, so that the water inlet is communicated with the water outlet. If the rotating steps of the stepping motor are inaccurate, the communicating cavity of the inner core of the valve body and the water outlet cannot be accurately aligned, so that the water inlet cannot be communicated with the water outlet, and the adjustable waste water valve 130 cannot normally discharge water. In order to guarantee that step motor can both be accurate drive accurate realization water inlet and the intercommunication of delivery port in valve body inner core intercommunication chamber at every turn, in prior art, when at every turn power-on, the controller of water purifier can control step motor reversal a biggest angle, make valve body inner core intercommunication chamber can return zero position, can lead to when valve body inner core intercommunication chamber is not in the biggest rotational position like this, when it returns zero position, because the structure of zero position is spacing, make step motor still can continue the circular telegram to be in the stall state, step motor chance generates heat when the stall, if be in frequent stall state if because frequent outage is electrified again and is leaded to, then can make step motor generate heat seriously and influence its working life.
Fig. 2 schematically shows a flowchart of a control method of the water purifier based on the above, and referring to fig. 2, the control method includes:
step S10, determining the power failure of the water purifier;
step S20, obtaining the number of rotating steps of the rotating stepping motor;
step S30, determining the rotation position of the stepping motor according to the rotation step number;
step S40, determining that the water purifier is powered on again;
and step S50, controlling the stepping motor to operate according to the rotating position.
In step S10, the detection of the power-off and incoming state of the water purifier may be realized by a detection circuit of the water purifier control circuit. Specifically, the detection may be performed by a dedicated detection circuit, or may be performed by a detection circuit provided inside a processor of the control circuit.
In steps S20 and S30, when the detection circuit detects that the water purifier is powered down, the processor obtains the number of steps of rotation that the stepping motor has rotated at present, and at least the processor is still in a power supply state in the control circuit at this moment, and specifically, power supply can be realized through the energy storage device, for example, the energy storage device is a large-capacity capacitor or a rechargeable battery, so that when the water purifier is powered down, the energy storage device can still supply power to the processor for a short time. The rotating position of the stepping motor can be determined according to the rotating steps.
In steps S40 and S50, when the detection circuit detects that the water purifier is being powered on again, the processor controls the operation of the stepping motor according to the rotational position so that the stepping motor is operated to a predetermined number of rotational steps, thereby eliminating the need for a process of controlling the stepping motor to reverse the maximum angle. Therefore, the heating caused by frequent locked rotation of the stepping motor under the condition of frequent power failure and power on is avoided, and the reliability of the stepping motor is reduced.
In a preferred embodiment of the present invention, as shown in fig. 3, the determining the rotational position of the stepping motor according to the number of rotational steps includes:
step S31, controlling the back-off rotation steps of the stepping motor;
step S32, determining the rotation position of the stepping motor;
controlling the operation of the stepping motor according to the rotation position comprises: and controlling the stepping motor to operate again according to the rotating position.
In this embodiment, when the detection circuit detects a power failure of the water purifier, the energy storage device not only supplies power to the processor, but also supplies power to the related circuits of the driving part motor and the stepping motor. At the moment, the processor controls the stepping motor to retreat the rotating step number according to the rotating step number of the obtained stepping motor which is rotated, namely the stepping motor is controlled to rotate the rotating step number in the direction opposite to the direction before the power failure, so that the stepping motor is retreated to the initial position where the rotation is started before the power failure.
And after the detection circuit detects that the water purifier is electrified again, the processor controls the stepping motor to operate again according to the initial position, namely, the stepping motor is controlled to operate again from the initial position for a preset rotating step number without reversing the step number corresponding to a maximum angle.
It is worth mentioning that in this embodiment, when the water purifier is powered off, the stepping motor may be in the rotation process, that is, the corresponding adjustable waste water valve is in the water gating and discharging process; or the stepping motor rotates to a preset step number to complete, the wastewater valve can be adjusted to be in a water outlet state after being gated, and in any state, when the power failure occurs, the stepping motor retracts the rotated step number according to the operation, so that the stepping motor returns to the initial position, the communicating cavity of the inner core of the valve body returns to the zero position, and the process of controlling the stepping motor to rotate by the maximum angle in the prior art to return the communicating cavity of the inner core of the valve body to the zero position when the water purifier is powered on again is not needed. That is, in this embodiment, when power is lost, that is, the communicating chamber of the inner core of the valve body returns to the zero position by controlling the retraction of the stepping motor.
In a preferred embodiment of the present invention, determining the rotational position of the stepping motor based on the number of rotational steps comprises: storing the number of the rotating steps; and controlling the stepping motor to operate according to the rotation position comprises: and restoring and controlling the stepping motor to operate based on the stored rotation step number.
In this embodiment, in comparison with the previous embodiment, when the water purifier is powered off, the processor stores the number of steps for which the stepping motor has been rotated, instead of controlling the stepping motor to perform the retraction operation. Thus, the energy storage device need not supply power to the stepper motor and stepper motor driver circuit 20 at this time, but only to the memory and processor, and if the processor has a memory built in, then only the processor needs to be powered. Because the power consumption of the processor and the memory is much smaller than that of the stepping motor and the stepping motor driving circuit 20, the power storage capacity of the energy storage device is much lower than that of the previous embodiment, and therefore the energy storage device can select components with low power storage so as to reduce the cost.
After the water purifier is powered on again, the stepping motor is controlled to continuously run to the preset step number only based on the stored rotating step number.
Specifically, in this embodiment, there are two application scenarios: when the stepping motor is in the rotating process, namely the corresponding adjustable waste water valve is in the water gating and discharging process, after the current rotating step number of the stepping motor is stored if the power is off, the stepping motor only needs to continuously operate the step number different from the preset step number after the next power-on, so that the adjustable waste water valve gates and discharges water; when the stepping motor and the rotation are completed to the preset step number, the wastewater valve can be adjusted and the gating is in a water outlet state, the stepping motor does not need to act after the power failure stores the step number of the current stepping motor which has rotated, and the stepping motor does not need to act after the next power on, because the preset step number has been rotated before the power failure, the adjustable wastewater valve is gated to discharge water.
Therefore, compared with the previous embodiment, in the embodiment, the rotation times of the stepping motor can be effectively reduced when the power is off and the power is on again, so that the service life of the stepping motor is further prolonged.
In a preferred embodiment of the present invention, as shown in fig. 4, the controlling the operation of the stepping motor further includes:
step S60, detecting the water quality before the water inlet of the reverse osmosis filter element of the water purifier;
step S70, determining the preset rotation steps according to the water quality condition; and
and step S80, controlling the stepping motor to rotate for a preset number of rotation steps.
In this embodiment, the water quality before the water inlet of the reverse osmosis filter element may be detected by a water quality detection device, where the water quality may specifically refer to a TDS value (Total Dissolved Solids), that is, a value indicating the purity degree of water, and at this time, the water quality detection device is a TDS module. The water quality detection device can be arranged on a water pipe between the reverse osmosis filter element and the booster pump shown in figure 1 or on a water inlet pipe of the booster pump, so as to realize the detection of the water quality.
When the water quality is better, a proper water outlet can be selected to be communicated with the water inlet by adjusting the rotating position of the communicating cavity of the inner core of the valve body, so that the water yield of the wastewater is low, and the yield of the pure water is correspondingly improved; when the water quality is poor, the water yield of the wastewater is large, so that the wastewater ratio is correspondingly adjusted according to the water quality condition, and the water resource waste caused by the single wastewater ratio is avoided. In order to achieve the purpose, the preset rotating step number is determined according to the water quality condition, and the stepping motor is controlled to rotate the preset rotating step number, so that the stepping motor drives the valve body inner core communicating cavity to rotate to a proper water outlet to communicate with the water inlet.
The embodiment of the invention also provides a control device for the adjustable valve of the water purifier, the system architecture of the water purifier is shown in figure 1, and the water purifier is the same as that in the control method embodiment of the water purifier.
Fig. 5 schematically shows a block diagram of the control device. Referring to fig. 5, the control device includes:
an energy storage device 50 configured to be charged if the water purifier is powered on and to power at least the processor 10 if the water purifier is powered off. The energy storage device 50 may be a large capacity capacitor or a rechargeable battery, such as a large capacity electrolytic capacitor EC1 shown in fig. 5. The electrolytic capacitor EC1 is connected in parallel to the supply output of the power supply circuit, so that it is charged by the power supply circuit when it is in operation.
And a power supply state detection device 30 configured to detect a power supply state of the water purifier. The power supply state may specifically include a power-down state and a power-up state, and may be implemented by a known general circuit to detect the power-down and power-up states of the water purifier.
A processor 10 configured to: receiving the power supply state from the power supply state detection device 30, determining that the water purifier is powered off according to the power supply state, acquiring the number of rotating steps that the stepping motor has rotated, determining the rotating position of the stepping motor according to the number of rotating steps, determining that the water purifier is powered on again according to the power supply state, and controlling the operation of the stepping motor according to the rotating position.
The above-described power supply state detection device 30 may also be a functional circuit integrated with the inside of the processor 10.
Examples of processor 10 herein may include, but are not limited to, a general purpose processor, a special purpose processor, a conventional processor, a Digital Signal Processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of Integrated Circuit (IC), a state machine, and the like.
The control device may further include a stepping motor driving circuit 20 to drive the stepping motor 60 to rotate under the control of the processor 10.
When the water purifier is powered off, the energy storage device 50 may continue to supply power to the processor 10 for a short time, at this time, when the processor 10 detects that the water purifier is powered off through the power supply state detection device 30, the processor 10 obtains the number of rotation steps that the stepping motor 60 has currently rotated, determines the rotation position of the stepping motor 60 according to the obtained number of rotation steps that the stepping motor 60 has rotated, and when the power supply state detection device 30 detects that the water purifier is powered on again, the processor 10 controls the stepping motor 60 to operate according to the rotation position, so that the stepping motor 60 operates to a predetermined number of rotation steps, and thus the processing of controlling the stepping motor 60 to rotate in the maximum angle is not needed. Therefore, the heating caused by frequent locked rotation of the stepping motor under the condition of frequent power failure and power on is avoided, and the reliability of the stepping motor is reduced.
In a preferred embodiment of the present invention, the processor 10 is further configured to: and controlling the stepping motor 60 to retreat the number of rotating steps, determining the rotating position of the stepping motor 60, and re-controlling the stepping motor 60 to operate according to the rotating position under the condition that the water purifier is determined to be electrified again according to the power supply state.
In this embodiment, the energy storage device 50 not only powers the processor 10, but also powers the stepper motor drive circuit 20 and the stepper motor 60, as shown in FIG. 5. At this time, the processor 10 controls the stepping motor 60 to retreat by the rotation step number according to the acquired rotation step number of the stepping motor 60 that has rotated, that is, controls the stepping motor 60 to rotate by the rotation step number in the opposite direction to the direction before the power failure, so that the stepping motor 60 retreats to the initial position where the rotation is started before the power failure. After the detection circuit detects that the water purifier is powered on again, the processor 10 only needs to control the stepping motor 60 to rotate from the initial position according to the original preset rotation step number, and the step number corresponding to the maximum angle does not need to be reversed.
It is worth noting that in this embodiment, when the water purifier is powered down, the stepping motor 60 may be in the process of rotating, i.e., the corresponding adjustable waste valve is in the process of gating water outlet; or the stepping motor 60 rotates to a preset step number to complete, namely the wastewater valve can be adjusted to be in a water outlet state, and in any state, when the power failure occurs, the stepping motor 60 retracts the rotated step number according to the operation, so that the stepping motor 60 returns to the initial position, the valve body inner core communicating cavity returns to the zero position, and therefore when the water purifier is powered on again, the process that the stepping motor 60 is controlled to rotate reversely by the maximum angle to enable the valve body inner core communicating cavity to return to the zero position in the prior art is not needed. That is, in this embodiment, when the power is turned off, that is, the retraction of the stepping motor 60 is controlled, the valve body core communicating chamber is returned to the zero point position.
Fig. 6 schematically shows another block diagram of the control device. In a preferred embodiment of the present invention, the control device further comprises a memory 70, and the processor 10 is further configured to: the number of rotation steps is stored in the memory, and in the case where it is determined that the water purifier is powered on again according to the power supply state, the operation of the stepping motor 60 is controlled based on the stored number of rotation steps.
Examples of memory 70 herein include, but are not limited to, FLASH memory or Electrically Erasable Programmable Read Only Memory (EEPROM).
In this embodiment, in comparison with the previous embodiment, when the water purifier is powered off, the processor 10 stores the number of steps acquired that the stepping motor 60 has rotated, instead of controlling the stepping motor 60 to perform the retraction operation. Therefore, the energy storage device 50 does not need to supply power to the stepping motor 60 and the stepping motor driving circuit 20, but only the memory 70 and the processor 10, and if the processor 10 is provided with the memory 70, only the processor 10 needs to be supplied with power. Since the power consumption of the processor 10 and the memory 70 is much smaller than that of the stepping motor 60 and the stepping motor driving circuit 20, the power storage capacity of the energy storage device 50 is much lower than that of the previous embodiment, and therefore the energy storage device 50 may be selected from components with low power storage capacity, so as to reduce the cost.
After the water purifier is powered on again, the stepping motor 60 is controlled to continue to operate to the predetermined number of steps based on the stored number of rotation steps.
Specifically, in this embodiment, there are two application scenarios: when the stepping motor 60 is in the rotating process, namely the corresponding adjustable waste water valve is in the water gating and discharging process, after the current step number of the rotating stepping motor 60 is stored if the power is off, and after the next power-on, the stepping motor 60 only needs to continuously operate for the step number difference with the preset step number, so that the adjustable waste water valve gates and discharges water; when the step motor 60 is rotated to the preset step number, namely the wastewater valve can be adjusted and the water outlet state can be gated, after the step number of the current step motor 60 which is rotated is stored in the power failure state, the step motor 60 does not need to act after the next power on, because the preset step number is rotated before the power failure, the adjustable wastewater valve is gated, namely the water outlet state can be achieved.
Therefore, in this embodiment, compared to the previous embodiment, the number of times of rotation of the stepping motor 60 can be effectively reduced during power down and power up again, so as to further improve the service life of the stepping motor 60.
In a preferred embodiment of the present invention, the processor 10 is further configured to: when the water purifier is powered on, the operation of the stepping motor 60 is controlled in a delayed manner.
Because it takes a certain amount of time for the energy storage device 50 to charge to full charge after power up, if the energy storage device 50 is not fully charged, the stepper motor 60 is controlled to operate, and if power is suddenly turned off again, the energy storage device 50 is not enough to power the processor 10 and other devices, such as the stepper motor 60 and the memory 70, due to insufficient stored power. Therefore, a short time, such as 10 seconds to 20 seconds, is required after power-up to control the operation of the stepping motor 60, so as to prevent the operation of the stepping motor 60 from affecting the charging of the energy storage device 50 during the time.
Fig. 7 schematically shows another block diagram of the control device. In a preferred embodiment of the present invention, the control device further includes:
a current or voltage detection device configured to detect a charging current or charging voltage of the energy storage device 50;
the processor 10 is further configured to: receiving a detected charging current or charging voltage from a current or voltage detection device; the operation of the stepping motor 60 is controlled only when the charging current or the charging voltage reaches a preset charging current threshold or a preset charging voltage threshold.
This embodiment differs from the previous embodiment in that the stepping motor 60 is controlled to operate only when a full charge of the energy storage device 50 is detected by adding a current or voltage detection device. As shown in fig. 7, the voltage detection device 80 determines that the energy storage device 50 is fully charged when detecting that the charging voltage of the energy storage device 50 reaches a preset voltage threshold at power-up.
Fig. 8 schematically shows another block diagram of the control device. In a preferred embodiment of the present invention, the control device further includes: a water quality detection device 90 configured to detect water quality before an inlet of a reverse osmosis filter element of the water purifier. The processor 10 is further configured to: receiving the detected water quality from the water quality detecting apparatus 90; determining the preset rotation steps according to the water quality condition; the step motor 60 is controlled to rotate the predetermined number of rotation steps.
In this embodiment, the water quality before the water inlet of the reverse osmosis filter element can be detected by the water quality detection device 90, wherein the water quality may specifically refer to a TDS value (Total Dissolved Solids), which represents the purity degree of water, and at this time, the water quality detection device 90 refers to a TDS module. The water quality detection device 90 may be disposed in a water pipe between the reverse osmosis filter element and the booster pump shown in fig. 1, or disposed on a water inlet pipe of the booster pump, thereby achieving detection of water quality.
When the water quality is better, a proper water outlet can be selected to be communicated with the water inlet by adjusting the rotating position of the communicating cavity of the inner core of the valve body, so that the water yield of the wastewater is low, and the yield of the pure water is correspondingly improved; when the water quality is poor, the water yield of the wastewater is large, so that the wastewater ratio is correspondingly adjusted according to the water quality condition, and the water resource waste caused by the single wastewater ratio is avoided. In order to achieve the purpose, the preset rotating step number is determined according to the water quality condition, and the stepping motor 60 is controlled to rotate the preset rotating step number, so that the stepping motor 60 drives the communicating cavity of the inner core of the valve body to rotate to a proper water outlet so as to communicate with the water inlet.
The embodiment of the invention also provides a water purifier, which comprises an adjustable waste water valve, a reverse osmosis filter element and the control device for the adjustable waste water valve of the water purifier. The system architecture of the water purifier is shown in fig. 1, and further comprises a booster pump 120 arranged at a water inlet end of the reverse osmosis filter element 110 to supply high-pressure water to the reverse osmosis filter element 110, an adjustable waste water valve 130 arranged at a waste water outlet of the reverse osmosis filter element 110, a water inlet pipe 160 connected to a water inlet end of the booster pump 120, a pure water outlet of the reverse osmosis filter element 110 connected to a purified water pipe 140, and a waste water pipe 150 connected to an outlet of the adjustable waste water valve 130. The water purifier can also comprise other devices which are not shown in figure 1 and are connected with the water inlet pipe, such as PP cotton, a front activated carbon filter element, a rear activated carbon filter element connected with the water outlet pipe and the like, and the details are not repeated.
According to the water purifier provided by the embodiment of the invention, the control device of the water purifier is arranged, so that the heating problem of the stepping motor for driving the adjustable waste water valve when the water purifier is subjected to ineffective operation such as frequent power failure and power on can be effectively avoided, and the working reliability of the whole water purifier is improved.
Embodiments of the present invention also provide a machine-readable storage medium having instructions stored thereon, which when executed by a processor, enable the processor to perform a method of controlling an adjustable waste valve for a water purifier as described in any of the above embodiments.
Those skilled in the art can understand that all or part of the steps in the method for implementing the above embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a (which may be a single chip, a chip, etc.) or a processor (processor) to execute all or part of the steps in the method for implementing each embodiment of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, various different embodiments of the present invention may be arbitrarily combined with each other, and the embodiments of the present invention should be considered as disclosed in the disclosure of the embodiments of the present invention as long as the embodiments do not depart from the spirit of the embodiments of the present invention.
Claims (7)
1. A control method for a water purifier comprising an adjustable waste water valve comprising a valve body and a stepping motor, characterized in that the control method comprises:
determining that the water purifier is powered down;
acquiring the number of rotating steps of the rotating stepping motor;
determining the rotating position of the stepping motor according to the rotating steps;
determining that the water purifier is powered on again; and
controlling the stepping motor to operate according to the rotating position so as to enable the stepping motor to operate to a preset rotating step number;
wherein determining the rotational position of the stepper motor based on the number of rotational steps comprises:
controlling the stepping motor to back the rotating steps; and
determining a rotational position of the stepper motor;
controlling the stepper motor to operate according to the rotational position comprises: controlling the stepping motor to operate again according to the rotating position;
or,
determining the rotational position of the stepper motor based on the number of rotational steps comprises: storing the number of the rotating steps; and
controlling the stepper motor to operate according to the rotational position comprises: and restoring and controlling the operation of the stepping motor based on the stored rotation step number.
2. The control method according to claim 1, characterized by further comprising:
detecting the water quality before a water inlet of a reverse osmosis filter element of the water purifier;
determining the preset rotation steps according to the water quality condition; and
and controlling the stepping motor to rotate for the preset rotation steps.
3. A control device for a water purifier, the water purifier including an adjustable waste valve, the adjustable waste valve including a valve body and a stepper motor, the control device comprising:
an energy storage device configured to be charged if the water purifier is powered on and to power at least a processor if the water purifier is powered off;
a power supply state detection device configured to detect a power supply state of the water purifier;
a processor configured to:
receiving the power supply state from the power supply state detection device;
determining the power failure of the water purifier according to the power supply state;
acquiring the number of rotating steps of the rotating stepping motor;
determining the rotating position of the stepping motor according to the rotating steps;
determining that the water purifier is powered on again according to the power supply state; and
controlling the stepping motor to operate according to the rotating position so as to enable the stepping motor to operate to a preset rotating step number;
wherein the processor is further configured to:
controlling the stepping motor to back the rotating steps;
determining a rotational position of the stepper motor;
under the condition that the water purifier is determined to be powered on again according to the power supply state, the stepping motor is controlled to operate again according to the rotating position;
alternatively, the control device further includes:
a memory;
the processor is further configured to:
storing the number of rotational steps to a memory; and
and under the condition that the water purifier is determined to be powered on again according to the power supply state, the operation of the stepping motor is controlled to be recovered based on the stored rotation step number.
4. The control device of claim 3, wherein the processor is further configured to: and when the water purifier is powered on, the stepping motor is controlled to operate in a delayed manner.
5. The control device according to claim 3, characterized by further comprising:
a current or voltage detection device configured to detect a charging current or charging voltage of the energy storage device;
the processor is further configured to:
receiving a detected charging current or charging voltage from the current or voltage detection device; and
and controlling the stepping motor to operate under the condition that the charging current or the charging voltage reaches a preset charging current threshold value or a preset charging voltage threshold value.
6. The control device according to any one of claims 3 to 5, characterized by further comprising:
a water quality detection device configured to detect water quality before an inlet of a reverse osmosis filter element of the water purifier;
the processor is further configured to:
receiving the detected water quality from the water quality detection apparatus;
determining the preset rotation steps according to the water quality condition; and
and controlling the stepping motor to rotate for the preset rotation steps.
7. A water purifier, characterized in that the water purifier comprises:
the adjustable waste water valve comprises a valve body and a stepping motor for driving the valve body;
the control device for a water purifier according to any one of claims 3 to 6.
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| JP5806143B2 (en) * | 2012-02-22 | 2015-11-10 | 株式会社パロマ | Water heater |
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| CN1140927A (en) * | 1995-07-06 | 1997-01-22 | 株式会社优尼希雅杰克斯 | Stepping motor driving method |
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| CN103195597A (en) * | 2013-04-07 | 2013-07-10 | 奇瑞汽车股份有限公司 | Method and device for controlling self-learning of stepping motor |
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| CN110304673A (en) | 2019-10-08 |
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