CN111547782B - Filter element blockage judging method and water purifying equipment - Google Patents
Filter element blockage judging method and water purifying equipment Download PDFInfo
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- CN111547782B CN111547782B CN202010274628.6A CN202010274628A CN111547782B CN 111547782 B CN111547782 B CN 111547782B CN 202010274628 A CN202010274628 A CN 202010274628A CN 111547782 B CN111547782 B CN 111547782B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 600
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000005086 pumping Methods 0.000 claims abstract description 207
- 238000000746 purification Methods 0.000 claims abstract description 127
- 230000035622 drinking Effects 0.000 claims abstract description 76
- 239000007788 liquid Substances 0.000 claims description 33
- 238000003860 storage Methods 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 235000013361 beverage Nutrition 0.000 claims description 2
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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
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- 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
- B01D35/143—Filter condition indicators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/152—Water filtration
Abstract
The application is suitable for the technical field of water purification and drinking, and provides a filter element blockage judging method and water purification and drinking equipment. The judging method comprises the following steps: acquiring a water pumping efficiency value of a water pump of a water purification device, determining a purification efficiency value of a filter element of the water purification device according to the water pumping efficiency value, and outputting prompt information under the condition that the purification efficiency value is smaller than a preset value; wherein, the prompt message is used for prompting to replace or clean the filter element of the clean drinking equipment. The application provides a filter core blocks up judgement method when judging whether water purification unit's filter core blocks up, confirms the purification efficiency value of filter core according to the efficiency value of drawing water, considers the efficiency of drawing water of suction pump to the influence of the purification efficiency value of filter core, avoids because the ageing reduction of the purification efficiency value of filter core that brings of suction pump, has improved the degree of accuracy that the equipment filter core of net drinking blockked up the judgement.
Description
Technical Field
The application belongs to the technical field of clean drinking water, and particularly relates to a filter element blockage judging method and a clean drinking device.
Background
With the improvement of living standard, the drinking-purifying device is widely popularized in daily life of people. Due to different water quality in various places and different water consumption of users, the service life of each clean drinking device is different, the blockage condition of the filter element of the clean drinking device is accurately judged, and the replacement of the filter element is a necessary means for prolonging the service life of the clean drinking device.
At present, the flow rate of water flowing into a water tank of the pure drinking device is generally determined by a flow meter arranged on a water inlet pipeline of the pure drinking device, and then the blockage condition of a filter element of the pure drinking device is determined according to the flow rate. Because the water outlet pipeline of the water purification and drinking equipment is usually provided with the water suction pump for supplying water to users, the method does not consider the influence of the aging of the water suction pump on the flow change on the flow meter, so that the filter element blockage judgment result of the water purification and drinking equipment is inaccurate.
Disclosure of Invention
In view of this, the embodiment of the present application provides a filter element blockage determination method and a clean drinking device, so as to solve the technical problem in the prior art that a filter element blockage determination result is inaccurate.
In a first aspect, an embodiment of the present application provides a method for determining filter element blockage, where the method includes:
acquiring a water pumping efficiency value of a water pump of the water purification equipment;
determining the purification efficiency value of a filter element of the water purification equipment according to the pumping efficiency value;
outputting prompt information under the condition that the purification efficiency value is smaller than a preset value; wherein, the prompt message is used for promoting to change or wash the filter core of drinking equipment clearly.
In one possible implementation manner of the first aspect, the preset value is a first threshold value or a second threshold value,
outputting prompt information under the condition that the purification efficiency value is smaller than a preset value; the method comprises the following steps:
under the condition that the purification efficiency value is smaller than a first threshold value, outputting first prompt information; the first prompt information is used for prompting the replacement of a filter element of the clean drinking equipment;
outputting second prompt information under the condition that the purification efficiency value is smaller than a second threshold value; the second prompt message is used for prompting the cleaning of the filter element of the drinking equipment, and the second threshold value is larger than the first threshold value.
In a possible implementation manner of the first aspect, obtaining a pumping efficiency value of a water pump of the net drinking device includes:
controlling the booster pump to be turned off; the booster pump is used for supplying water to a water tank of the water purifying device;
acquiring the current water level and the current water storage capacity of a water tank;
acquiring a first pumping duration time required by the water level of the water tank to be reduced from the current water level to the lowest water level;
determining the current water pumping efficiency value of the water pump according to the current water storage capacity and the first water pumping duration;
controlling the booster pump to be started;
and after waiting for the first preset time, returning to the step of controlling the booster pump to be turned off, and updating the water pumping efficiency value of the water pumping pump according to the current water pumping efficiency value.
In a possible implementation manner of the first aspect, determining a purification efficiency value of a filter element of the clean drinking device according to the pumping efficiency value includes:
judging whether the currently stored target pumping efficiency value is smaller than a third threshold value;
if the target pumping efficiency value is smaller than a third threshold value, acquiring the current water level and the current water storage capacity of the water tank;
acquiring first time required by the water level of the water tank to change from the current water level to a preset water level and second water pumping duration time in the first time;
determining the current purification efficiency value of the filter element according to the target water pumping efficiency value, the current water level, the preset water level, the second water pumping duration and the first time;
and after waiting for the second preset time, returning to execute the step of judging whether the currently stored target pumping efficiency value is smaller than a third threshold value or not, and updating the purification efficiency value of the filter element according to the current purification efficiency value.
In a possible implementation manner of the first aspect, after each time the current pumping efficiency value of the water pump is determined, the method further includes:
judging whether the pumping efficiency value is smaller than a fourth threshold value;
if the pumping efficiency value is smaller than a fourth threshold value, outputting third prompt information; and the third prompt message is used for prompting to replace the water suction pump of the clean drinking equipment.
In a possible implementation manner of the first aspect, obtaining a pumping efficiency value of a water pump of the net drinking device includes:
when a first trigger signal sent by a liquid level switch is received, acquiring a pumping efficiency value of a water pump of the water purifying device; wherein, first trigger signal is used for the water level of the water tank of sign net drink equipment to reach the highest water level.
In a possible implementation manner of the first aspect, the method for determining filter element blockage further includes:
when a second trigger signal sent by the liquid level switch is received, judging whether the current purification efficiency value is larger than or equal to a third threshold value; the second trigger signal is used for representing that the water level of the water tank reaches the lowest water level;
if the current purification efficiency value is larger than or equal to a third threshold value, controlling the water suction pump to be turned off;
acquiring a third time when the water level of the water tank reaches the highest water level from the lowest water level and the volume of the water tank of the pure drinking equipment;
and updating the current purification efficiency value according to the volume of the water tank and the third time.
In a second aspect, an embodiment of the present application provides a clean drink device, including: the water pump comprises a water tank, a filter element, a water pump and a control unit;
the filter element is used for filtering water entering the water tank;
the water suction pump is used for supplying water in the water tank to a user;
the control unit is used for determining the purification efficiency value of the filter element according to the pumping efficiency value after acquiring the pumping efficiency value of the pumping pump, and outputting prompt information under the condition that the purification efficiency value is smaller than a preset value; wherein, the prompt message is used for prompting to replace or clean the filter element.
In a possible implementation manner of the second aspect, the water tank further comprises a liquid level switch, and the liquid level switch is used for generating a first trigger signal when the water level of the water tank reaches the highest water level;
the method for acquiring the water pumping efficiency value of the water pump by the control unit comprises the following steps: when a first trigger signal sent by the liquid level switch is received, the water pumping efficiency value of a water pump of the water purifying and drinking equipment is obtained.
In one possible implementation manner of the second aspect, the liquid level switch is a three-stage float switch.
In a third aspect, an embodiment of the present application provides a filter element clogging determination apparatus, including:
the acquisition module is used for acquiring the water pumping efficiency value of a water pump of the clean drinking equipment;
the determining module is used for determining the purification efficiency value of a filter element of the water purification equipment according to the water pumping efficiency value;
the output module is used for outputting prompt information under the condition that the purification efficiency value is smaller than a preset value; wherein, the prompt message is used for prompting to replace or clean the filter element of the drinking equipment.
In a fourth aspect, an embodiment of the present application provides a control unit, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of any one of the methods in the first aspect are implemented.
In a fifth aspect, the present application provides a computer-readable storage medium, where a computer program is stored, and when executed by a processor, the computer program implements the steps of any one of the methods in the first aspect.
In a sixth aspect, the present application provides a computer program product, which when run on a terminal device, causes the terminal device to perform the steps of any one of the methods in the first aspect.
The filter element blockage judging method provided by the embodiment of the application determines the purification efficiency value of the filter element according to the pumping efficiency value when judging whether the filter element of the water purifying device is blocked, considers the influence of the pumping efficiency of the water pumping pump on the purification efficiency value of the filter element, avoids the reduction of the purification efficiency value of the filter element caused by the aging of the water pumping pump, and improves the accuracy of the filter element blockage judgment of the water purifying device.
It is understood that the beneficial effects of the second to sixth aspects can be seen from the description of the first aspect, and are not described herein again.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for determining clogging of a filter element according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a process of obtaining a pumping efficiency value of a water pump according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating the determination of the purification efficiency value of the filter element based on the pumping efficiency value according to an embodiment of the present disclosure;
FIG. 4 is a schematic flow chart illustrating a process for determining a purification efficiency value of a filter element according to another embodiment of the present application;
FIG. 5 is a schematic diagram of a clean beverage apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a filter element blockage judging device according to an embodiment of the present disclosure;
fig. 7 is a schematic hardware composition diagram of a control unit according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. It is worth mentioning that the specific embodiments listed below may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 1 is a schematic flow chart of a filter element blockage determination method according to an embodiment of the present application, which is suitable for a water purification apparatus, where the water purification apparatus includes a water tank, a filter element, a water pump, and a control unit, the filter element is used to filter water entering the water tank, the water pump is used to provide water in the water tank to a user, and the control unit is used to perform filter element blockage determination; in the embodiment, the main execution body is a control unit of the clean water device, and the method for determining clogging of a filter element as shown in fig. 1 may include:
and S10, acquiring the water pumping efficiency value of a water pump of the water purification equipment.
In this step, the pumping efficiency value of the water pump may refer to the pumping amount per second when the water purification device only pumps water but does not produce water.
Optionally, the pumping efficiency value may be referred to formula (1):
F＝x/t1 (1)
wherein F is the pumping efficiency value t1For the duration of pumping by the pump, x is t1The water pumping amount in time.
In this step, obtaining the pumping efficiency value of the water pump of the water purification and drinking device may mean that the control unit updates the pumping efficiency value of the water pump according to a preset time interval and stores the updated pumping efficiency value, and when the control unit determines the blockage condition of the filter element, reads the currently stored pumping efficiency value.
Illustratively, the control unit updates the pumping efficiency of the water pump every 24 hours. For example, the pumping efficiency of the water pump is updated at 10 points every day, and when the control unit judges the blockage condition of the filter element at 20 points, the pumping efficiency value obtained at 10 points is read. It should be understood that when the pumping efficiency of the water pump is updated, the user is required to open the water discharge switch to discharge water.
Wherein, the control unit updating the pumping efficiency value of the water pump may mean that the control unit acquires the current pumping efficiency value and updates the pumping efficiency value of the water pump based on the current pumping efficiency value.
Optionally, the control unit acquiring the current water pumping efficiency value may refer to that the control unit controls a booster pump for supplying water to a water tank of a water pump to be turned off, controls the water pump for supplying water in the water tank to a user to be turned on, calculates a water pumping amount per second when the to-be-tested water purification device only pumps water without producing water, and takes the water pumping amount per second as the water pumping efficiency value of the water pump.
The clean drinking equipment applicable to the method of the embodiment can comprise a liquid level meter, wherein the liquid level meter is arranged in the water tank and is used for acquiring the numerical value of any water level of the water tank; therefore, obtaining the pumping efficiency value of the water pump of the clean drinking equipment can be started at any water level.
Optionally, the clean drinking apparatus in this embodiment may also include a level switch for generating a first trigger signal when the water level of the water tank reaches a maximum level, or for generating a second trigger signal when the water level of the water tank reaches a minimum level. At this moment, when obtaining the efficiency value of drawing water of the suction pump of the equipment of drinking only, need at first supply water to the water tank through the booster pump, when receiving the first trigger signal that liquid level switch sent, acquire the efficiency value of drawing water of the suction pump of the equipment of drinking only again.
It should be understood that, in this step, the water pumping efficiency value of the water pump of the water purification and drinking device is obtained, and the water purification and drinking device only pumps water without producing water, so that part of the filtered pure water should be stored in the water tank of the water purification and drinking device to meet the water pumping requirement of the water pump.
S20, determining the purification efficiency value of the filter element of the water purification equipment according to the water pumping efficiency value.
In practical application, the water purification device is often in a state of simultaneously producing water and pumping water (providing pure water to a user), and the purpose of this step is to determine the purification efficiency value of the filter element of the water purification device when the water purification device produces water and pumps water simultaneously.
Wherein, the purification efficiency value of filter core means the water supply quantity per second when only making water and not drawing water of net drinking equipment.
In this embodiment, confirm the purification efficiency value of the filter core of clean drink equipment according to the pumping efficiency value and can indicate whether at first judge the pumping efficiency value to be the effective value, under the condition that the pumping efficiency value is the effective value, confirm the purification efficiency value of the filter core of clean drink equipment according to the pumping efficiency value.
Wherein, the effective value is used for the efficiency of drawing water that the sign suction pump is influential to the purification efficiency value of filter core, draws water efficiency promptly and then the sign suction pump has preliminary ageing state for the effective value, and the effective value specifically can be less than the third threshold value for the efficiency of drawing water of suction pump.
Optionally, the third threshold may be determined according to an initial pumping efficiency of the water pump, and the initial pumping efficiency may be obtained by querying factory parameters of the water pump. For example, if the initial pumping efficiency of the water pump is f, the third threshold may be 0.9 f.
Optionally, if the pumping efficiency value is greater than or equal to the third threshold, the pumping efficiency value may be represented as an invalid value, the influence of the pumping efficiency of the pumping pump on the purification efficiency value of the filter element may be ignored at this time, and the purification efficiency value of the filter element of the clean drinking device may be determined according to the pumping efficiency value, specifically, the pumping efficiency value may be set to be 1, and the purification efficiency value of the filter element of the clean drinking device may be determined.
In this embodiment, under the condition that the pumping efficiency value is the valid value, determining the purification efficiency value of the filter element of the clean drinking device according to the pumping efficiency value may refer to including the following steps:
step A1: the control unit acquires the current water level of a water tank of the pure drinking equipment and marks the current water level as an initial water level H1。
In this step, be provided with the level gauge in the water tank of clean drink equipment, the control unit can acquire the water level of the water tank of clean drink equipment in real time through the level gauge.
Step A2: if the initial water level H1When the height is larger than the preset height, the control unit controls the water suction pump and the booster pump to be started, and the starting time of the water suction pump and the booster pump is recorded as T1.
Because the pumping efficiency of the water pump is higher than the water supply efficiency of the booster pump, when the water pump and the booster pump of the water purifying device are all started, the water level of the water tank can be reduced. Therefore, when the initial water level H1When the height is larger than the preset height, the water tank indicates that certain pure water is stored in the water tank currently, and the water purifying and drinking device can be started simultaneouslyA water pump and a booster pump.
In this step, the control unit may control the water pump to be started, and the control unit controls the water pump to be started in response to the operation of starting water discharge by the user.
Step A3: after the water suction pump and the booster pump continuously operate for a period of time, the control unit controls the water suction pump to be turned off, and records the current time as T2.
At this time, only the booster pump in the water purification apparatus is turned on, i.e., in the water production state, so that the water level of the water tank is raised. In the step, in the continuous operation of the water suction pump and the booster pump, the control unit obtains the water level of the water tank through the liquid level meter in real time, and controls the water suction pump to be closed when the water level of the water tank reaches the lowest water level or before the water level reaches the lowest water level.
In this step, the control unit may control the water pump to be turned off, and the control unit controls the water pump to be turned off in response to the operation of turning off the water discharge by the user.
Step A4: at the water level of the water tank reaching the initial water level H1And (4) controlling the booster pump to be closed, and recording the current time as T3.
Step A5: and determining the purification efficiency value of the filter element of the clean drinking equipment according to the water pumping efficiency value, the T1, the T2 and the T3.
Optionally, the purification efficiency value J of the filter element can be referred to formula (2):
J＝F*(T2-T1)/(T3-T1) (2)
wherein F is the current pumping efficiency value.
Step A6: if the initial water level H1When the height is smaller than or equal to the preset height, the control unit controls the booster pump to be started, and the starting time of the water suction pump and the booster pump is recorded as T4.
Step A7: after the booster pump continuously operates for a period of time, the control unit controls the water suction pump to be started, and records the current time as T5.
Step A8: at the water level of the water tank reaching the initial water level H1Meanwhile, the booster pump and the water suction pump are controlled to be closed, and the current time is recorded as T6.
Step A9: according to the drawerThe water efficiency values, T4, T5, and T6 determine a purification efficiency value for a filter element of the clean drink apparatus.
Optionally, the purification efficiency value J of the filter element can be referred to formula (3):
J＝F*(T6-T5)/(T6-T4) (3)
wherein F is the current pumping efficiency value.
In this embodiment, the water tank of the water purifying device may be a liquid level switch, and the liquid level switch sends the trigger signal to the control unit only when the water level of the water tank reaches a preset position, for example, the first trigger signal is sent when the water level of the water tank reaches the highest water level, and the second trigger signal is sent when the water level reaches the lowest water level.
For example, if the water tank of the clean drinking device is equipped with a level switch, no level meter is installed. Step a in the above embodiment may be performed1Initial position H in (1)1The maximum water level or initial position of the water tank is set to the minimum water level of the water tank.
Illustratively, if step A is performed1Initial position H in (1)1Set to the highest water level of the water tank, according to step A1To step A5And determining the purification efficiency value J of the filter element. If step A is performed1Initial position H in (1)1Set to the lowest water level of the water tank, according to step A1And step A6To step A9And determining the purification efficiency value J of the filter element.
And S30, outputting prompt information when the purification efficiency value is smaller than the preset value.
In this embodiment, the prompt message is used for prompting to replace or clean the filter element of the drinking water purifying device.
The preset value may be a first threshold or a second threshold.
In one example, the prompt message is output when the purification efficiency value is smaller than the preset value, and specifically, the first prompt message for prompting to replace the filter element of the clean drinking device may be output when the purification efficiency value is smaller than the first threshold value.
In another example, the prompt message is output when the purification efficiency value is smaller than the preset value, specifically, the second prompt message for prompting to clean the filter element of the water drinking device is output when the purification efficiency value is smaller than the second threshold value; wherein the second threshold is greater than the first threshold.
Wherein, first threshold value and second threshold value all can be confirmed according to the initial purification efficiency value of filter core, and wherein, the initial purification efficiency value of filter core can inquire the parameter of leaving the factory of filter core and obtain.
Illustratively, the initial purification efficiency value of the filter element is y, the second threshold value may be 0.6y, and the first threshold value may be 0.4 y.
Optionally, when the purification efficiency value of the filter element is less than 0.8y, fourth prompt information for prompting that the filter element of the clean drinking equipment is blocked can be output.
The filter element blockage judging method provided by the embodiment of the application determines the purification efficiency value of the filter element according to the pumping efficiency value when judging whether the filter element of the water purifying device is blocked, considers the influence of the pumping efficiency of the water pumping pump on the purification efficiency value of the filter element, avoids the reduction of the purification efficiency value of the filter element caused by the aging of the water pumping pump, and improves the accuracy of the filter element blockage judgment of the water purifying device.
Fig. 2 is a schematic flowchart of acquiring a pumping efficiency value of a water pump according to an embodiment of the present application, and illustrates one possible implementation of acquiring the pumping efficiency value of the water pump in step 10 in fig. 1. In this embodiment, the clean drinking device further includes a booster pump for supplying water to the water tank of the clean drinking device, as shown in fig. 2, acquiring the pumping efficiency value of the pumping pump includes:
and S111, controlling the booster pump to be turned off.
And S112, acquiring the current water level and the current water storage capacity of the water tank.
In this step, be provided with the level gauge in the water tank of clean drink equipment, the current water level of the water tank of clean drink equipment can be acquireed in real time through the level gauge to the control unit.
The volume of the water tank is known, and the current water storage capacity can be determined according to the ratio of the current water level to the highest water level.
And S113, acquiring a first pumping duration required by the water level of the water tank to be reduced from the current water level to the lowest water level.
In this step, the duration of pumping refers to the duration of pumping by the water pump.
If the water level of the water tank is reduced to the lowest water level from the current water level, if the user is in the water discharging state continuously, namely the water suction pump is in the opening state all the time, the first water pumping duration is the same as the time required for reducing the water level of the water tank to the lowest water level from the current water level.
If the user carries out the interactive operation of water discharging and water closing, the first water pumping duration refers to the time for starting the water pumping pump in the time required for reducing the water level of the water tank from the current water level to the lowest water level.
And S114, determining the current water pumping efficiency value of the water pump according to the current water storage capacity and the first water pumping duration.
And the current water pumping efficiency value of the water pump is the ratio of the current water storage capacity to the first water pumping duration.
Optionally, after determining the current pumping efficiency of the water pump, determining whether the pumping efficiency value is smaller than a fourth threshold value; if the pumping efficiency value is smaller than the fourth threshold value, outputting third prompt information; and the third prompt message is used for prompting to replace the water suction pump of the clean drinking equipment.
The fourth threshold value may be obtained by determining the initial pumping efficiency according to the initial pumping efficiency value of the water pump and querying factory parameters of the water pump. For example, if the initial pumping efficiency of the water pump is f, the third threshold may be 0.3 f. The fourth threshold is less than the third threshold in step 20.
And S115, controlling the booster pump to be started.
And S116, after waiting for the first preset time, returning to the step of controlling the booster pump to be turned off, and updating the water pumping efficiency value of the water pumping pump according to the current water pumping efficiency value.
And at a first preset time and a preset time interval in the step 10, the control unit updates the water pumping efficiency value of the water pump once every other first preset time, so that when the water pumping efficiency value is reduced to be below a fourth threshold value, third prompt information for prompting to replace the water pump of the clean water drinking equipment is output in time.
Fig. 3 is a schematic flow chart of determining a water purification efficiency value of a filter element according to a water pumping efficiency value according to an embodiment of the present application, and illustrates a possible implementation manner of determining the water purification efficiency value of the filter element according to the water pumping efficiency value in step 20 in the embodiment of fig. 1. In this embodiment, the booster pump for supplying water to the water tank is always in an open state when the water tank does not reach the maximum water level, and a liquid level meter capable of acquiring the water level of the water tank is provided in the water tank; as shown in fig. 3, determining the water purification efficiency value of the filter element according to the pumping efficiency value includes:
and S211, judging whether the currently stored target pumping efficiency value is smaller than a third threshold value.
The purpose of this step lies in judging whether target pumping efficiency value is the valid value.
And the currently stored target pumping efficiency value is the pumping efficiency value obtained by the control unit for the last time.
Illustratively, the control unit updates the pumping efficiency of the water pump every 24 hours. For example, the pumping efficiency of the water pump is updated at 10 points every day, and when the control unit determines the blockage condition of the filter element at 20 points, the currently stored target pumping efficiency value is the pumping efficiency value obtained at 10 points today.
Wherein the third threshold is the same as the third threshold in step 10.
And S212, if the target pumping efficiency value is smaller than a third threshold value, acquiring the current water level of the water tank.
The technical solution of this step can be seen in step 112.
S213, acquiring a first time required by the water level of the water tank to change from the current water level to the preset water level and a second water pumping duration time in the first time.
In this step, the preset water level may refer to any water level in the water tank.
In this step, the change may refer to a decrease or an increase in the water level. If the water pump is always in an open state in the first time, the change is descending; if the water pump is only started for a period of time within the first time, the change may be a rise, specifically, the start time of the water pump is determined.
The opening of the water pump is controlled by the control unit in response to the water discharging operation of a user, and the closing of the water pump is controlled by the control unit in response to the water closing operation of the user.
Illustratively, the current water level is the highest water level H of the water tankmaxIf the preset water level is the lowest water level H of the water tankmin. And during the period that the water level of the water tank is changed to the preset water level from the current water level, the water suction pump is always in an open state, and the second water suction duration time is the same as the first time.
S214, determining the current purification efficiency value of the filter element according to the target water pumping efficiency value, the current water level, the preset water level, the second water pumping duration and the first time.
The current water level in this step is the current water level in step S212.
In this step, the booster pump for supplying water to the water tank is always in an open state in a state where the water tank does not reach the highest water level, and therefore the time for the filter element to filter is the first time.
And the second water pumping duration is the starting time of the water pump in the first time.
In this step, determining the current purification efficiency value of the filter element may refer to determining a water volume change value V1 of the water tank according to the current water level and a preset water level. After obtaining the water quantity variation value V1 of the determined water tank, the purification efficiency value of the filter element can participate in the formula (4)
J＝(V1+F’*△T1)/T7 (4)
Wherein V1 is the water quantity change value of the water tank in the first time, F' is the target water pumping efficiency value,
△T1for the second pumping duration, T7 is the first time, i.e., the time during which the filter cartridge is filtering.
S215, after waiting for a second preset time, returning to the step of judging whether the currently stored target pumping efficiency value is smaller than a third threshold value, and updating the purification efficiency value of the filter element according to the current purification efficiency value.
The control unit updates the purification efficiency value of the filter element once every second preset time so as to output prompt information for prompting the replacement or cleaning of the filter element in time when the pumping efficiency value is reduced to be below a preset value.
The method in the embodiment of fig. 3 is suitable for a clean drinking device including a liquid level meter, and if the clean drinking device only includes a liquid level switch, that is, if the control unit can only obtain the water levels of a plurality of water tanks, the current water level and the preset position in the embodiment of fig. 3 can be set as the water level that can be identified by the liquid level switch, and then the calculation is performed according to the formula (4).
In practical application, after obtaining the efficiency value of drawing water, if the efficiency value of drawing water is greater than or equal to the third threshold value, then can characterize the efficiency value of drawing water for invalid value, the efficiency of drawing water of suction pump can be ignored to the influence of the purification efficiency value of filter core this moment, then confirm the purification efficiency value of the filter core of drinking water equipment according to the efficiency value of drawing water, specifically can refer to and set for the efficiency value of drawing water to be 1, confirm the purification efficiency value of the filter core of drinking water equipment. This is illustrated by the embodiment of fig. 4.
Fig. 4 is a schematic flow chart of determining a water purification efficiency value of a filter element according to another embodiment of the present application, in this embodiment, the water purification device further includes a liquid level switch, and the liquid level switch is configured to generate a second trigger signal when the water level of the water tank reaches a minimum water level, and this application describes a possible implementation manner of determining the water purification efficiency value of the filter element when the water level of the water tank reaches the minimum water level, as shown in fig. 4, the filter element blockage determination method further includes:
s411, when a second trigger signal sent by the liquid level switch is received, whether the current pumping efficiency value is larger than or equal to a third threshold value or not is judged.
Wherein, the second trigger signal is used for representing that the water level of the water tank reaches the lowest water level. And the control unit receives a second trigger signal sent by the liquid level switch, and then the water level of the water tank reaches the lowest water level.
The purpose of this step lies in judging whether current pumping efficiency value is invalid value.
And S412, if the current pumping efficiency value is larger than or equal to the third threshold value, controlling the water pump to be turned off.
If the current water pumping efficiency value is larger than or equal to the third threshold value, the water pumping efficiency value is an invalid value, the influence of the water pumping efficiency of the water pump on the purification efficiency value of the filter element can be ignored, and therefore the water pump can be controlled to be turned off.
And S413, acquiring a third time when the water level of the water tank reaches the highest water level from the lowest water level and the water tank volume of the pure drinking equipment.
And S414, updating the current purification efficiency value according to the volume of the water tank and the third time.
In this step, the updated purification efficiency value is a ratio of the volume of the water tank to the third time.
The method in the embodiment of fig. 4 is suitable for the clean drinking device including the liquid level switch, if the clean drinking device includes the liquid level meter, that is, when the control unit can obtain any water level of the water tank, the change start position and the change end position of the water level in the embodiment of fig. 4 can be adjusted, and the purification efficiency value of the filter element is determined according to the ratio of the water level change amount to the change time corresponding to the water level change.
Fig. 5 is a schematic hardware composition diagram of a net drinking device provided in the embodiment of the present application. As shown in fig. 5, the clean drink apparatus includes a water tank 501, a filter cartridge 502, a suction pump 503, and a control unit 504.
Wherein the filter element 502 is used for filtering water entering the water tank 501, and the suction pump 503 is used for supplying water in the water tank 501 to a user. The control unit 504 is configured to determine that the filter element is clogged, and specifically, the control unit 504 is configured to determine a purification efficiency value of the filter element 502 according to the pumping efficiency value after acquiring the pumping efficiency value of the pumping pump 503, and output a prompt message prompting replacement or cleaning of the filter element when the purification efficiency value is smaller than a preset value.
Optionally, the clean drinking device further comprises a booster pump 506, one end of the booster pump 506 is connected with an external water source, and the other end is connected with the filter element 502 for pumping the external water source to the water tank 501. As shown in fig. 5, a indicates that an external water source enters a booster pump of the pure water device, and B indicates that a water pump 503 pumps pure water in a water tank 501 to a user.
In this embodiment, if the sensors in the clean drinking device for determining the water level of the water tank 501 are different, the method for the control unit to obtain the water pumping efficiency value of the water pump 503 is different.
In one embodiment, the clean drink device comprises a liquid level meter for acquiring the water level of the water tank. The control unit obtains the pumping efficiency value of the pumping pump 503, specifically, the control unit 504 controls the booster pump to be turned off, obtains the current water level of the water tank through the liquid level meter, and obtains the current water storage amount according to the current water level calculation; the control unit 504 controls the water suction pump 503 to be started, and obtains a first water suction duration time required by the water level of the water tank to be reduced from the current water level to the lowest water level; and the control unit determines the current water pumping efficiency value of the water pump according to the current water storage capacity and the first water pumping duration.
In another embodiment, the net drinking device comprises a level switch 505, the level switch 505 being adapted to generate a first trigger signal when the water level of the water tank 501 reaches a maximum level, or to generate a second trigger signal when the water level of the water tank 501 reaches a minimum level.
At this time, the control unit 504 may specifically obtain the pumping efficiency value of the water pump, where the control unit 504 may first control the booster pump 506 to be turned on to supply water to the water tank 501, and when receiving the first trigger signal sent by the liquid level switch, the control unit 504 controls the booster pump 506 to be turned off and the water pump 503 to be turned on, obtains a fourth time required for the water level of the water tank to decrease from the highest water level to the lowest water level, and determines the pumping efficiency value of the water pump according to the volume of the water tank and the fourth time.
The starting time of the fourth time is the time when the control unit 504 receives the first trigger signal sent by the liquid level switch 505, and the ending time is the time when the control unit 504 receives the second trigger signal sent by the liquid level switch 505.
Optionally, the liquid level switch 505 may also be a three-stage float switch, and at this time, the liquid level switch may generate a third trigger signal when the water level of the water tank 501 reaches a certain preset water level (for example, the middle of the water tank), and in order to improve efficiency, when the control unit 504 acquires the pumping efficiency value of the water pump, the time for the water level of the water tank to decrease from the highest water level to the preset water level may be determined only; wherein the volume of water between the high water level and the preset water level is known.
In this embodiment, the sensors for determining the water level of the water tank 501 in the water purification device are different, and the method for determining the purification efficiency value of the filter element by the control unit according to the water pumping efficiency value is also different, which specifically refers to the technical solutions in the embodiments of fig. 3 and fig. 4 and is not described herein again.
In this embodiment, the filter element 502 may be a Reverse Osmosis (RO) membrane filter element. Optionally, a full-effect membrane cartridge 507 may be included between the RO membrane cartridge 502 and the booster pump 506 in order to improve the filtration accuracy of the clean drinking apparatus. The control unit 504 calculates the purification efficiency value of the filter element at this time to be the comprehensive purification efficiency value of the RO membrane filter element 502 and the full-effect membrane filter element 507.
Fig. 6 is a schematic structural diagram of a filter element blockage determination device according to an embodiment of the present application. The included units are used for executing steps in the embodiments corresponding to fig. 1 to fig. 4, and refer to the related descriptions in the embodiments corresponding to fig. 1 to fig. 4. For convenience of explanation, only the portions related to the present embodiment are shown. Fig. 6 provides a filter clogging judgment device suitable for the control unit shown in fig. 5, and referring to fig. 5, the filter clogging judgment device includes an acquisition module 610, a determination module 620, and an output module 630.
The obtaining module 610 is configured to obtain a pumping efficiency value of a water pump of the clean drinking device.
A determination module 620 for determining a purification efficiency value of a filter element of the clean drinking device according to the pumping efficiency value.
An output module 630, configured to output a prompt message when the purification efficiency value is smaller than a preset value; wherein, the prompt message is used for prompting to replace or clean the filter element of the drinking equipment.
Optionally, the preset value is a first threshold or a second threshold, and the outputting module 630, when the purification efficiency value is smaller than the preset value, outputs the prompt message including:
under the condition that the purification efficiency value is smaller than a first threshold value, outputting first prompt information; the first prompt information is used for prompting the replacement of a filter element of the clean drinking equipment;
outputting second prompt information under the condition that the purification efficiency value is smaller than a second threshold value; the second prompt message is used for prompting the cleaning of the filter element of the drinking equipment, and the second threshold value is larger than the first threshold value.
Optionally, the obtaining module 610 obtains a pumping efficiency value of a pumping pump of the net drinking device, which may include:
controlling the booster pump to be turned off; the booster pump is used for supplying water to a water tank of the water purifying device;
acquiring the current water level and the current water storage capacity of a water tank;
acquiring a first pumping duration time required by the water level of the water tank to be reduced from the current water level to the lowest water level;
determining the current water pumping efficiency value of the water pump according to the current water storage capacity and the first water pumping duration;
controlling the booster pump to be started;
and after waiting for the first preset time, returning to the step of controlling the booster pump to be turned off, and updating the water pumping efficiency value of the water pumping pump according to the current water pumping efficiency value.
Optionally, the determining module 620 determines a purification efficiency value of a filter element of the clean water device according to the pumping efficiency value, including:
judging whether the currently stored target pumping efficiency value is smaller than a third threshold value;
if the target pumping efficiency value is smaller than a third threshold value, acquiring the current water level and the current water storage capacity of the water tank;
acquiring first time required by the water level of the water tank to change from the current water level to a preset water level and second water pumping duration time in the first time;
determining the current purification efficiency value of the filter element according to the target water pumping efficiency value, the current water level, the preset water level, the second water pumping duration and the first time;
and after waiting for a second preset time, returning to execute the step of judging whether the currently stored target pumping efficiency value is smaller than a third threshold value, and updating the purification efficiency value of the filter element according to the current purification efficiency value.
Optionally, after each time the current pumping efficiency value of the water pump is determined, the output module 630 is further configured to:
judging whether the pumping efficiency value is smaller than a fourth threshold value;
if the pumping efficiency value is smaller than the fourth threshold value, outputting third prompt information; and the third prompt message is used for prompting to replace the water suction pump of the clean drinking equipment.
Optionally, the obtaining module 610 obtains a pumping efficiency value of a water pump of the net drinking device, and may further include:
when a first trigger signal sent by a liquid level switch is received, acquiring a pumping efficiency value of a water pump of the water purifying device; wherein, first trigger signal is used for the water level of the water tank of sign net drink equipment to reach the highest water level.
Optionally, the determining module 620 is further specifically configured to:
when a second trigger signal sent by the liquid level switch is received, judging whether the current pumping efficiency value is larger than or equal to a third threshold value; the second trigger signal is used for representing that the water level of the water tank reaches the lowest water level;
if the current pumping efficiency value is larger than or equal to a third threshold value, controlling the water pump to be turned off;
acquiring a third time when the water level of the water tank reaches the highest water level from the lowest water level and the volume of the water tank of the pure drinking equipment;
and updating the current purification efficiency value according to the volume of the water tank and the third time.
The filter element blockage judging device provided in the embodiment shown in fig. 6 can be used for implementing the technical scheme in the above method embodiments, the implementation principle and technical effect are similar, and details are not repeated here.
Fig. 7 is a schematic diagram of a hardware component of a control unit according to an embodiment of the present application. As shown in fig. 7, the control unit 54 of this embodiment includes: at least one processor 541, a memory 542, and computer programs stored in the memory 542 and executable on the processor 541. The control unit further includes a communication section 543, wherein the processor 541, the memory 542, and the communication section 543 are connected by a bus 544.
The processor 541, when executing the computer program, implements the steps of the above-mentioned filter element blockage determination method embodiments, such as the steps S10 to S30 in the embodiment shown in fig. 1. Alternatively, the processor 541, when executing the computer program, implements the functions of each module/unit in the above-described device embodiments, such as the functions of the modules 610 to 630 shown in fig. 6.
Illustratively, a computer program can be partitioned into one or more modules/units that are stored in the memory 542 and executed by the processor 541 to accomplish the present application. One or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of computer programs in the control unit 504.
Those skilled in the art will appreciate that fig. 7 is merely an example of a control unit and does not constitute a limitation of the control unit and may include more or fewer components than shown, or combine certain components, or different components, such as input-output devices, network access devices, buses, etc.
The Processor 541 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 542 may be an internal storage unit of the control unit, or may be an external storage device of the control unit, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. The memory 542 is used for storing the computer programs and other programs and data required by the control unit. The memory 542 may also be used to temporarily store data that has been output or is to be output.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The embodiments of the present application also provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps in the above-mentioned method embodiments.
The embodiments of the present application provide a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in the above method embodiments when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal apparatus, a recording medium, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other ways. For example, the above-described apparatus/network device embodiments are merely illustrative, and for example, a module or a unit may be divided into only one type of logic function, and may be implemented in other ways, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (7)
1. A method for determining clogging of a filter element, comprising:
acquiring a water pumping efficiency value of a water pump of the water purification equipment;
determining a purification efficiency value of a filter element of the pure drinking equipment according to the water pumping efficiency value;
specifically, judging whether a currently stored target pumping efficiency value is smaller than a third threshold value, wherein the third threshold value is smaller than an initial pumping efficiency value of a water pump;
if the target pumping efficiency value is smaller than the third threshold value, acquiring the current water level of the water tank;
acquiring first time required by the water level of the water tank to change from the current water level to a preset water level and second water pumping duration within the first time;
determining the current purification efficiency value of the filter element according to the target water pumping efficiency value, the current water level, the preset water level, the second water pumping duration and the first time;
after waiting for a second preset time, returning to execute the step of judging whether the currently stored target pumping efficiency value is smaller than a third threshold value, and updating the purification efficiency value of the filter element according to the current purification efficiency value;
outputting prompt information under the condition that the purification efficiency value is smaller than a preset value; wherein, the prompt message is used for prompting to replace or clean the filter element of the clean drinking equipment.
2. The method of filter element clogging determination of claim 1, wherein the predetermined value is a first threshold value or a second threshold value, both of which are less than an initial cleaning efficiency value of the filter element, and wherein the first threshold value is less than the second threshold value,
outputting prompt information under the condition that the purification efficiency value is smaller than a threshold value; the method comprises the following steps:
outputting first prompt information under the condition that the purification efficiency value is smaller than the first threshold value; the first prompt message is used for prompting the replacement of the filter element of the clean drinking equipment;
outputting second prompt information under the condition that the purification efficiency value is smaller than the second threshold value; the second prompt message is used for prompting to clean the filter element of the clean drinking equipment, and the second threshold value is larger than the first threshold value.
3. The method for determining filter element blockage according to claim 1 or 2, wherein the obtaining of the pumping efficiency value of the water pump of the clean water equipment comprises:
controlling the booster pump to be turned off; the booster pump is used for supplying water to a water tank of the pure drinking equipment;
acquiring the current water level and the current water storage capacity of the water tank;
acquiring a first pumping duration time required by the water level of the water tank to be reduced from the current water level to the lowest water level;
determining the current water pumping efficiency value of the water pump according to the current water storage capacity and the first water pumping duration;
controlling the booster pump to be started;
and after waiting for the first preset time, returning to execute the step of controlling the booster pump to be turned off, and updating the water pumping efficiency value of the water pumping pump according to the current water pumping efficiency value.
4. The method of filter clogging determination of claim 3 wherein after each determination of the current pumping efficiency value of the pump, the method further comprises:
judging whether the pumping efficiency value is smaller than a fourth threshold value, wherein the fourth threshold value is smaller than the initial pumping efficiency value of the water pump, and the fourth threshold value is smaller than the third threshold value;
if the pumping efficiency value is smaller than the fourth threshold value, outputting third prompt information; and the third prompt message is used for prompting to replace the water suction pump of the clean drinking equipment.
5. A clean drink apparatus, comprising: the water pump comprises a water tank, a filter element, a water pump and a control unit;
the filter element is used for filtering water entering the water tank;
the water suction pump is used for supplying water in the water tank to a user;
the control unit is used for determining the purification efficiency value of the filter element according to the pumping efficiency value after acquiring the pumping efficiency value of the pumping pump, and outputting prompt information under the condition that the purification efficiency value is smaller than a threshold value; specifically, judging whether a currently stored target pumping efficiency value is smaller than a third threshold value, wherein the third threshold value is smaller than an initial pumping efficiency value of a water pump;
if the target pumping efficiency value is smaller than the third threshold value, acquiring the current water level of the water tank;
acquiring first time required by the water level of the water tank to change from the current water level to a preset water level and second pumping duration time in the first time;
determining the current purification efficiency value of the filter element according to the target water pumping efficiency value, the current water level, the preset water level, the second water pumping duration and the first time;
after waiting for a second preset time, returning to execute the step of judging whether the currently stored target pumping efficiency value is smaller than a third threshold value, and updating the purification efficiency value of the filter element according to the current purification efficiency value; wherein, the prompt message is used for prompting to replace or clean the filter element.
6. The net drinking apparatus of claim 5, further comprising a level switch for generating a first trigger signal when the water level of the water tank reaches a maximum level;
the method for acquiring the pumping efficiency value of the water pump by the control unit comprises the following steps: and when a first trigger signal sent by the liquid level switch is received, acquiring the pumping efficiency value of a water pump of the clean drinking equipment.
7. The clean beverage apparatus of claim 6, wherein: the liquid level switch is a three-section type float switch.
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