CN108303584B - Detection method and water machine - Google Patents
Detection method and water machine Download PDFInfo
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- CN108303584B CN108303584B CN201810110024.0A CN201810110024A CN108303584B CN 108303584 B CN108303584 B CN 108303584B CN 201810110024 A CN201810110024 A CN 201810110024A CN 108303584 B CN108303584 B CN 108303584B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Abstract
The invention discloses a detection method and a water machine, and relates to the field of water treatment equipment. The detection method comprises the following steps: judging whether the working current data of the water pump is in a preset working current data interval or not, wherein the preset working current data interval represents the range of the current data of the water pump working under the condition of a rated load, and when the working current data is not in the preset working current data interval, judging that the water pump is in an abnormal working state. The method has the advantages of small occupied space of required equipment, low cost and high reliability.
Description
Technical Field
The invention relates to the field of water treatment equipment, in particular to a detection method and a water machine.
Background
Along with the continuous improvement of health consciousness of people, the requirement of people on water quality is higher and higher, and water purifying equipment slowly enters thousands of households and becomes one of necessary equipment at home.
The water purification unit's internal design has a water tank or balanced water tank, and it takes out the water in the water tank through the water pump, and when the water level of water in the water tank descends and the lack of water appears, water purification unit will start lack of water protect function, ensures water purification unit's part safety.
Present water purification unit all installs level sensor on its water tank to carry out the lack of water protection to water pump and water purification unit under the water tank lack of water condition, avoid leading to equipment to damage because of the water tank lacks of water, for example, the water level in the water tank is detected through dry reed pipe formula water level switch or capacitanc water level switch of installation on the water tank, with start lack of water protect function when the lack of water appears, the former belongs to physical formula structure, uncontrollable factor is many, if: the floating magnet is blocked due to a mechanical structure, so that the water level start-stop switch is invalid; meanwhile, the reed pipe type water level switch is complex in structure, large in occupied space, high in use cost, high in cost of the latter, high in requirements for the wall thickness and the flatness of the water tank, troublesome in installation and fixation, and not universally used in the industry, reliability needs to be verified, and in addition, the reed pipe type water level switch comprising other types of water level switches has the problems of large occupied space and troublesome installation.
In view of this, it is very important to design a detection method and a water supply device that occupy a small space, have a low cost, and have a high reliability.
Disclosure of Invention
The invention aims to provide a detection method for detecting the working state of a water pump, and the detection method needs small equipment occupation space, is low in cost and has high reliability.
The invention also aims to provide the water machine, which adopts the detection method to detect the working state of the water pump, and has the advantages of small occupied space of equipment, low cost and high reliability.
The invention provides a technical scheme that:
in a first aspect, an embodiment of the present invention provides a detection method, which is applied to a water pump, where the detection method includes: judging whether the working current data of the water pump is in a preset working current data interval or not, wherein the preset working current data interval represents the range of the current data of the water pump working under the condition of a rated load; and when the working current data is not in the preset working current data interval, judging that the water pump is in an abnormal working state.
With reference to the first aspect, in a first implementation manner of the first aspect, the operating current data includes an operating current value, the operating current value represents a current value of the water pump during operation, the preset operating current data interval includes a preset operating current interval, and the preset operating current interval represents a range of a current value of the water pump during operation under a condition of a rated load, and the detecting method may be: judging whether the operation current value is within the preset operation current interval or not; and when the running current value is not within the preset running current interval, judging that the water pump is in an abnormal working state.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in a second implementation manner of the first aspect, the determining that the water pump is in an abnormal operation state further includes: judging whether the running current value is lower than the lowest value in the preset running current interval or not; and when the running current value is lower than the lowest value in the preset running current interval, judging that the water pump is in a water-deficient working state.
With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, the working current data includes a starting current value, the starting current value is a current value when the water pump is started, the preset working current data interval includes a preset starting current interval, and the preset starting current interval represents a range of the current value when the water pump is started under a condition with a rated load, and the detecting method may be: judging whether the starting current value of the water pump is within a preset starting current interval or not; and when the starting current value is not within the preset starting current interval, judging that the water pump is in an abnormal working state.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in a fourth implementation manner of the first aspect, the step of determining that the water pump is in an abnormal operation state further includes: judging whether the starting current value is lower than the lowest value in the preset starting current interval or not; and when the starting current value is lower than the lowest value in the preset starting current interval, judging that the water pump is in a water-deficient working state.
With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, the working current data includes a shutdown current duration, the shutdown current duration is a duration of a current generated when the water pump is shutdown, the preset working current data interval includes a preset shutdown time interval, and the preset shutdown time interval represents a range of the shutdown current duration when the water pump is shutdown under a rated load condition, and the detection method may be: judging whether the shutdown current duration of the water pump is within a preset shutdown time interval or not; and when the duration time of the shutdown current is not within the preset shutdown time interval, judging that the water pump is in an abnormal working state.
With reference to the first aspect and the foregoing implementation manner of the first aspect, in a sixth implementation manner of the first aspect, the step of determining that the water pump is in an abnormal operation state further includes: judging whether the duration time of the shutdown current is higher than the highest value in the preset shutdown time interval or not; and when the duration of the shutdown current is higher than the highest value in the preset shutdown time interval, judging that the water pump is in a water-deficient working state.
In a second aspect, an embodiment of the present invention provides a water machine, where the water machine includes a controller, a current sensor, a start-stop switch, and a water pump, where the controller is electrically connected to the current sensor and the start-stop switch, respectively, and the current sensor is installed between the start-stop switch and the water pump; the water pump is characterized in that the start-stop switch is used for closing or breaking the electric connection between the water pump and the driving power supply, the driving power supply is used for driving the water pump to work, the current sensor is used for detecting working current data during the working of the water pump and transmitting the working current data to the controller, the controller judges whether the working current data are not in a preset working current data interval, the preset working current data interval represents the range of the current data of the water pump working under the condition of rated load, when the working current data are not in the preset working current data interval, the controller judges that the water pump is in an abnormal working state and controls the start-stop switch to break the electric connection between the water pump and the driving power supply.
With reference to the second aspect, in a first implementation manner of the first aspect, the start-stop switch is a triode or an MOS transistor.
With reference to the second aspect and the foregoing implementation manner, in a second implementation manner of the second aspect, the water dispenser further includes a prompt alarm, the prompt alarm is electrically connected to the controller, when the operating current value is not within a preset operating current interval, the controller is further configured to control the prompt alarm to send a prompt or alarm information.
Compared with the prior art, the detection method and the water machine provided by the invention have the beneficial effects that:
whether the working current data of the water pump is within the preset working current data interval or not is judged so as to judge whether the water pump is in an abnormal working state or not, the required equipment occupies small space, the cost is low, and the reliability is high.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.
Fig. 1 is a block diagram schematically illustrating a water machine according to a first embodiment of the present invention;
FIG. 2 is a schematic block diagram of a flow chart of a detection method according to a second embodiment of the present invention;
fig. 3 is a schematic block diagram illustrating a flow of a sub-step of the detection method according to the second embodiment of the present invention, when step S103 determines that the water pump is in an abnormal operating state according to the running current value;
fig. 4 is a schematic block diagram illustrating a flow of a sub-step of the detection method according to the second embodiment of the present invention, when step S103 determines that the water pump is in an abnormal operating state according to the starting current value;
fig. 5 is a schematic block diagram illustrating a flow of a sub-step of the detection method according to the second embodiment of the present invention, when step S103 determines that the water pump is in an abnormal operation state according to the duration of the shutdown current.
Icon: 100-a water machine; 110-a drive power supply; 120-a water pump; 130-start-stop switch; 140-a controller; 150-prompt alarm; 160-a current sensor; 170-memory.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the invention refers to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The existing water purifying equipment is provided with a liquid level sensor on a water tank thereof so as to carry out water shortage protection on a water pump and the water purifying equipment under the condition of water shortage of the water tank, but the reed pipe type water level switch or the capacitance type water level switch used by the existing water purifying equipment has the problems of large occupied space and troublesome installation.
The embodiment of the invention provides a detection method and a water machine, wherein the water machine detects whether the water inlet end of a water pump of the water machine is lack of water by using the detection method, and the detection method judges whether the water machine is lack of water by detecting the current of the water pump during working, so that the detection cost is low, the occupied space is small, and the reliability is high.
The first embodiment:
referring to fig. 1, fig. 1 is a block diagram schematically illustrating a water machine 100 according to a first embodiment of the present invention.
The water machine 100 comprises a controller 140, a current sensor 160, a start-stop switch 130 and a water pump 120, wherein the controller 140 is electrically connected with the current sensor 160 and the start-stop switch 130 respectively, the start-stop switch 130 is used for closing or breaking the electrical connection between the water pump 120 and a driving power supply 110, the driving power supply 110 is used for driving the water pump 120 to work, the current sensor 160 is installed on a lead between the water pump 120 and the start-stop switch 130 and is used for detecting the input and output of the water pump 120 to obtain current and related data when the water pump 120 is started and operated and the electrical connection between the water pump 120 and the driving power supply 110 is.
The current sensor 160 is configured to detect working current data of the water pump 120 during working, and transmit the working current data to the controller 140, the controller 140 determines whether the working current data is within a preset working current data interval, where the preset working current data represents a current data range of the water pump 120 working under a rated load, when the working current data is within the preset working current interval, the controller 140 determines that the water pump 120 is in a normal working state, and when the working current data is not within the preset working current interval, the controller 140 determines that the water pump 120 is in an abnormal working state, the controller 140 controls the start-stop switch 130 to disconnect electrical connection between the water pump 120 and the driving power supply 110, and starts abnormal protection on the water pump 120, so as to improve stability of the water machine 100.
The working current data includes a starting current value, the starting current value is a current value of the water pump 120 at the starting time, the current value may be an average value of current values of the water pump 120 at the starting time, or a maximum value of the current values of the water pump 120 at the starting time, a preset working current data interval may be set by a manufacturer, the preset working current data interval includes a preset starting current interval, the preset starting current interval represents a range of current values of the water pump 120 at the starting time under a rated load, the current sensor 160 may detect a starting current value of the water pump 120 at the starting time and transmit the starting current value to the controller 140, the controller 140 determines whether the starting current value is within the preset starting current interval, the preset starting current interval represents a range of current values of the water pump 120 at the starting time under the rated load, it should be noted that the starting time is a period after the start-stop switch 130 closes the electrical connection between the water pump 120 and the driving power supply 110, the length of time may be set by the manufacturer. When the starting current value is not within the preset starting current interval, the controller 140 determines that the water pump 120 is in an abnormal working state, and the controller 140 controls the start-stop switch 130 to disconnect the electric connection between the water pump 120 and the driving power supply 110, so that the water pump 120 stops working, and abnormal protection of the water pump 120 is started, so as to improve the stability of the water machine 100.
It should be noted that the abnormal operation state of the water pump 120 includes a water-deficient operation state and an overload operation state, when the water pump 120 is in the water-deficient operation state, a water-deficient situation will occur at a water inlet end of the water pump 120, a load torque of the water pump 120 will be lower than a rated load torque, a starting current of the water pump 120 will also be reduced due to reduction of the load torque and be lower than a minimum value of a preset starting current interval, and when the controller 140 determines that a starting current value detected and generated by the current sensor 160 is lower than the minimum value of the preset starting current interval, the controller 140 will determine that the water pump 120 is in the water-deficient operation state. In addition, when the water pump 120 is in the overload operating state, the water pump 120 may have too large rotation resistance of the water pump 120 due to damage of components of the water pump 120, pipeline blockage or other reasons, the operating current of the water pump 120 in the overload operating state will be greatly increased, the operating resistance will be increased, the water pump 120 will be seriously overheated, and even the water pump 120 is damaged, the starting current of the water pump 120 will also be increased due to the increase of the load and be higher than the maximum value of the preset starting current interval, and when the controller 140 determines that the starting current value detected by the current sensor 160 is higher than the maximum value of the preset starting current interval, the controller 140 will determine that the water pump 120 is in the overload operating state.
In addition, the working current data further includes an operating current value, the operating current value represents a current value of the water pump 120 during operation, the preset working current data interval further includes a preset operating current interval, the preset operating current interval represents a range of a current value of the water pump 120 during operation under a rated load, the current sensor 160 is further configured to detect the operating current value of the water pump 120 during operation and transmit the operating current value to the controller 140, the controller 140 determines whether the operating current value is within the preset operating current interval, the preset operating current interval represents a range of a current value of the water pump 120 during operation under a rated load, when the operating current value is not within the preset operating current interval, the controller 140 determines that the water pump 120 is in an abnormal operating state, the controller 140 controls the start-stop switch 130 to disconnect the electrical connection between the water pump 120 and the driving power supply 110, so that the water pump 120 stops operating, to operate an abnormal protection of the water pump 120 to improve the stability of the water machine 100.
It should be noted that, when the water pump 120 is in the water-deficient working state, the water-deficient condition occurs at the water inlet end of the water pump 120, the load torque of the water pump 120 is lower than the rated load torque, the running current of the water pump 120 is also reduced due to the reduction of the load torque and is lower than the lowest value of the preset running current interval, and when the controller 140 determines that the running current value detected and generated by the current sensor 160 is lower than the lowest value of the preset running current interval, the controller 140 determines that the water pump 120 is in the water-deficient working state. In addition, when the water pump 120 is in the overload operating state, the water pump 120 may have too large rotation resistance of the water pump 120 due to damage of components of the water pump 120, pipeline blockage or other reasons, the operating current of the water pump 120 in the overload operating state will be greatly increased, the operating resistance will be increased, the water pump 120 will be seriously overheated, and even the water pump 120 is damaged, the operating current of the water pump 120 will also be increased due to the increase of the load and be higher than the maximum value of the preset operating current interval, and when the controller 140 determines that the operating current value detected and generated by the current sensor 160 is higher than the maximum value of the preset operating current interval, the controller 140 will determine that the water pump 120 is in the overload operating state.
In addition, the working current data further includes a shutdown current duration, the shutdown current duration is a duration length of a current generated when the water pump 120 is stopped, the preset working current data interval further includes a preset shutdown time interval, and the shutdown time interval represents a range of the shutdown current duration when the water pump 120 is stopped under a rated load condition. After the controller 140 responds to a user operation or a program instruction to control the start-stop switch 130 to disconnect the electrical connection between the water pump 120 and the driving power supply 110, calculating a time length from a time point when the start-stop switch 130 disconnects the electrical connection between the water pump 120 and the driving power supply 110 to a time point when a current value detected by the current sensor 160 when the water pump 120 is stopped falls to zero, wherein the time length is a stop current duration, the controller 140 determines whether the stop current value is within a preset stop time interval, the preset stop time interval represents a range of the stop current duration when the water pump 120 is stopped under a rated load, when the stop current is not within the preset stop time interval, the controller 140 determines that the water pump 120 is in an abnormal operation state, the controller 140 controls the start-stop switch 130 to disconnect the electrical connection between the water pump 120 and the driving power supply 110, and stops the water pump 120, to perform an abnormal protection of the water pump 120 to improve the stability of the water machine 100.
It is understood that in other embodiments, the operating current data may be detected by other devices, for example, the water machine 100 determines whether the water pump 120 is in a normal operating state according to the current data sampled by the current sampling circuit of the power input port for supplying power to the water machine 100.
It should be noted that, when the water pump 120 is in the water-deficient working state, the water-deficient condition occurs at the water inlet end of the water pump 120, the load torque of the water pump 120 is lower than the rated load torque, the duration of the shutdown current of the water pump 120 is also increased due to the reduction of the load torque and is higher than the maximum value of the preset shutdown time interval, and when the controller 140 determines that the duration of the shutdown current is higher than the maximum value of the preset shutdown time interval, the controller 140 determines that the water pump 120 is in the water-deficient working state. In addition, when the water pump 120 is in the overload operating state, the water pump 120 may be damaged due to components of the water pump 120, the rotation resistance of the water pump 120 is too large due to pipeline blockage or other reasons, the current of the water pump 120 in the overload operating state will be greatly increased, the working resistance will be increased, the water pump 120 is seriously overheated, or even the water pump 120 is damaged, the duration of the shutdown current of the water pump 120 will be reduced due to the increase of the load of the water pump 120 and is lower than the minimum value of the preset shutdown time interval, and when the controller 140 determines that the duration of the shutdown current is lower than the minimum value of the preset shutdown time interval, the controller 140 will determine that the water pump 120 is in the overload operating state.
It is understood that, in other embodiments, the operating current data further includes a start time, the start time represents a time period used by the water pump 120 to start from a standstill to a rated rotation speed, the preset operating current data interval further includes a preset start time interval, the preset start time interval represents a time period required by the water pump 120 to start from a standstill to a rated rotation speed under a rated load, the water machine 100 may further include a rotation speed sensor, the rotation speed sensor is mounted on the water pump 120 and electrically connected to the controller 140, the rotation speed sensor is used for detecting a rotation speed of the water pump 120 and transmitting the rotation speed at the start to the controller 140, the controller 140 generates a time required by the rotation speed of the water pump 120 to increase from zero to the rated rotation speed, the time is the start time, the controller 140 determines whether the start time is within the preset start time interval, the preset start time interval represents a start time period for the water pump 120 to start under the rated load, when the starting time is not within the preset starting time interval, the controller 140 determines that the water pump 120 is in an abnormal working state, and the controller 140 controls the start-stop switch 130 to disconnect the electrical connection between the water pump 120 and the driving power supply 110, so that the water pump 120 stops working, and the abnormal protection of the water pump 120 is started, so as to improve the stability of the water machine 100.
It should be noted that, when the water pump 120 is in the water-deficient working state, the water-deficient condition occurs at the water inlet end of the water pump 120, the load torque of the water pump 120 is lower than the rated load torque, the starting time of the water pump 120 is also reduced due to the reduction of the load torque and is lower than the lowest value of the preset starting time interval, and when the controller 140 determines that the starting time is lower than the lowest value of the preset starting time interval, the controller 140 determines that the water pump 120 is in the water-deficient working state. In addition, when the water pump 120 is in the overload operating state, the water pump 120 may have too large rotation resistance of the water pump 120 due to damage of components of the water pump 120, pipeline blockage or other reasons, the operating current of the water pump 120 in the overload operating state will be greatly increased, the operating resistance will be increased, the water pump 120 will be seriously overheated, and even the water pump 120 is damaged, the starting time of the water pump 120 will also be increased due to the increased load and be higher than the maximum value of the preset starting time interval, and when the controller 140 determines that the starting time is higher than the maximum value of the preset starting time interval, the controller 140 will determine that the water pump 120 is in the overload operating state.
It is understood that the current sensor 160 may also be a digital-to-analog conversion module provided in the controller 140, so as to save the device size and improve the circuit integration.
Preferably, the water machine 100 further comprises a prompt alarm 150, the prompt alarm 150 is electrically connected to the controller 140, and when the controller 140 determines that the water pump 120 is in an abnormal working state, the controller 140 controls the prompt alarm 150 to send a prompt or alarm message to prompt a user or a maintenance worker that the water pump 120 is in a water shortage working state or an overload working state, so that the water pump 120 is checked and processed in time, and the running stability of the water pump 120 is improved.
Preferably, the start-stop switch 130 is a triode or a MOS transistor (field effect transistor), and the triode or the MOS transistor can be directly mounted on the circuit board, so that the size is small, the occupied space is small, the cost is low, and the requirement of the water machine 100 on the mounting environment can be reduced.
In addition, the water machine 100 further includes a memory 170, the memory 170 is electrically connected to the controller 140, and the memory 170 is configured to store the preset operation current interval, the preset starting time interval, the preset shutdown time interval, the working state data of the water pump 120, and the like.
It can be understood that, in other embodiments, the water dispenser 100 may further include a water outlet pressure gauge, the water outlet pressure gauge is installed at the water outlet end of the water pump 120, the water outlet pressure gauge is electrically connected to the controller 140, when the water inlet end of the water pump 120 is in water shortage, the water outlet end of the water pump 120 enters air, the pressure detected by the water outlet pressure gauge is greatly reduced, the controller 140 may determine whether the water inlet end of the water pump 120 is in water shortage through the pressure value detected by the water outlet pressure gauge, and then perform a water shortage protection action on the water pump 120 in time.
It is understood that in the present embodiment, the current is used as the object of detection by the detection method, and in other embodiments, other values related to the current value may also be used as the object of detection by the detection method, for example, the current change condition of the water pump 120 may be characterized by detecting the voltage value of the resistor electrically connected to the water pump 120.
The working principle of the water machine 100 provided by the first embodiment is as follows:
the water machine 100 detects the starting current value, the running current value and the stopping current duration of the water pump 120 through the current sensor 160, and the controller 140 respectively determines whether the values belong to a preset starting current interval, a preset running current interval and a preset stopping time interval corresponding to a preset working current data interval, so as to determine the load condition of the water pump 120, and further determine whether the water pump 120 is in water shortage.
In summary, the following steps:
according to the water machine 100 provided by the embodiment of the invention, the water machine 100 judges the load condition of the water pump 120 by detecting the working current of the water pump 120, and further judges whether the water pump 120 is short of water, so that the water machine 100 is small in occupied space, low in cost and high in reliability.
Second embodiment:
referring to fig. 2, fig. 2 is a schematic flow chart of a detection method according to a second embodiment of the present invention.
The detection method specifically comprises the following steps:
and S101, judging whether the working current data is in a preset working current data interval. This step S101 is executed by the controller 140 in the first embodiment.
When the working current data is within the preset working current data interval, step S102 is executed.
Step S102, it is determined that the water pump 120 is in a normal operating state. This step S102 is executed by the controller 140 in the first embodiment.
When the operating current data is not within the preset operating current data interval, step S103 is executed.
In step S103, it is determined that the water pump 120 is in an abnormal operation state. This step S103 is executed by the controller 140 in the first embodiment.
The working current data includes an operating current value, a starting current value and a stopping current duration, and the preset working current data interval includes a preset operating current interval, a preset starting current interval and a preset stopping time interval.
It is understood that, in other embodiments, the water machine 100 may simultaneously use a plurality of operating current data to determine the operating state of the water pump 120, for example, when the operating current value belongs to the preset operating current interval and the starting current value belongs to the preset starting current interval, the controller 140 determines that the operating state of the water pump 120 is the normal operating state, and of course, other data may also be combined.
Further, when it is determined that the water pump 120 is in the abnormal operation state according to the operation current value not being within the preset operation current interval, the step S103 of determining that the water pump 120 is in the abnormal operation state may further include the following sub-steps, please refer to fig. 3, where fig. 3 is a schematic flow chart of the sub-steps of determining that the water pump 120 is in the abnormal operation state according to the operation current value in the step S103 of the detection method according to the second embodiment of the present invention.
A substep S1031, judging whether the operation current value is lower than the lowest value in the preset operation current interval; this step S1031 is executed by the controller 140 in the first embodiment.
When the operation current value is lower than the lowest value in the preset operation current interval, the sub-step S1032 determines that the water pump 120 is in the water shortage working state. This step S1032 is executed by the controller 140 in the first embodiment.
When the operation current value is higher than the highest value in the preset operation current interval, the sub-step S1033 determines that the water pump 120 is in the overload operating state. This step S1033 is executed by the controller 140 in the first embodiment.
Further, when it is determined that the water pump 120 is in the abnormal operation state according to the starting current value not being within the preset starting current interval, the step S103 of determining that the water pump 120 is in the abnormal operation state may further include the following sub-steps, please refer to fig. 4, where fig. 4 is a schematic block flow diagram of the sub-steps of determining that the water pump 120 is in the abnormal operation state according to the starting current value in the step S103 of the detection method according to the second embodiment of the present invention.
Substep S1034, judging whether the starting current value is lower than the lowest value in the preset starting current interval; this step S1034 is performed by the controller 140 in the first embodiment.
When the starting current value is lower than the lowest value in the preset starting current interval, the water pump 120 is determined to be in the water-deficient working state in the substep S1035. This step S1035 is executed by the controller 140 in the first embodiment.
When the starting current value is higher than the highest value in the preset starting current interval, the sub-step S1036 determines that the water pump 120 is in the overload working state. This step S1036 is performed by the controller 140 in the first embodiment.
Further, when the water pump 120 is determined to be in the abnormal operation state according to the duration of the shutdown current not being within the preset shutdown time interval, the step S103 of determining that the water pump 120 is in the abnormal operation state may further include the following sub-steps, please refer to fig. 5, where fig. 5 is a schematic block diagram of a flow of the sub-steps of determining that the water pump 120 is in the abnormal operation state according to the duration of the shutdown current in the step S103 of the detection method according to the second embodiment of the present invention.
A substep S1037 of judging whether the duration time of the shutdown current is lower than the lowest value in a preset shutdown time interval; this step S1037 is executed by the controller 140 in the first embodiment.
When the duration of the shutdown current is lower than the minimum value in the preset shutdown time interval, the sub-step S1038 determines that the water pump 120 is in the overload operation state. This step S1038 is executed by the controller 140 in the first embodiment.
When the duration of the shutdown current is higher than the highest value in the preset shutdown time interval, the sub-step S1039 determines that the water pump 120 is in the water-deficient working state. This step S1039 is executed by the controller 140 in the first embodiment.
The working principle of the detection method provided by the second embodiment is as follows:
judging whether the starting current value, the running current value and the shutdown current duration of the water pump 120 belong to preset working current data, such as: the starting current interval, the running current interval and the shutdown current interval are preset, and the working state of the water pump 120 is judged according to the starting current interval, the running current interval and the shutdown current interval, so that whether the water pump 120 is in a water shortage state or an overload state is judged.
In summary, the following steps:
the detection method provided by the embodiment of the invention is used for detecting the working state of the water pump 120, and the detection method has the advantages of small occupied space of equipment, low cost and high reliability.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that the features in the above embodiments may be combined with each other and the present invention may be variously modified and changed without conflict. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A detection method is applied to a water pump and is characterized by comprising the following steps:
judging whether the working current data of the water pump is in a preset working current data interval or not, wherein the preset working current data interval represents the range of the current data of the water pump working under the condition of a rated load;
when the working current data is not in the preset working current data interval, judging that the water pump is in an abnormal working state;
the working current data comprise shutdown current duration, the shutdown current duration is the duration length of current generated when the water pump is shut down, the preset working current data interval comprises a preset shutdown time interval, the preset shutdown time interval represents the range of the shutdown current duration when the water pump is shut down under the condition of rated load, and the detection method comprises the following steps of:
judging whether the shutdown current duration of the water pump is within a preset shutdown time interval or not;
when the duration time of the shutdown current is not within the preset shutdown time interval, judging that the water pump is in an abnormal working state;
the step of determining that the water pump is in an abnormal operation state further includes:
judging whether the duration time of the shutdown current is higher than the highest value in the preset shutdown time interval or not;
when the duration time of the shutdown current is higher than the highest value in the preset shutdown time interval, judging that the water pump is in a water-deficient working state;
the working current data further includes a starting time, the starting time represents a time length used by the water pump to start from a standstill to a rated rotating speed, the preset working current data interval further includes a preset starting time interval, the preset starting time interval represents a range of the time length required by the water pump to start from the standstill to the rated rotating speed under the condition of a rated load, and the detection method further includes:
judging whether the starting time is within the preset starting time interval or not;
when the starting time is not within the preset starting time interval, judging that the water pump is in an abnormal working state;
when the starting time is lower than the lowest value of the preset starting time interval, the water pump is judged to be in a water shortage working state;
and when the starting time is higher than the highest value of the preset starting time interval, judging that the water pump is in an overload working state.
2. The detection method according to claim 1, wherein the operating current data includes an operating current value, the operating current value represents a current value of the water pump during operation, the preset operating current data interval includes a preset operating current interval, and the preset operating current interval represents a range of current values of the water pump during operation under a rated load condition, and the detection method may be:
judging whether the operation current value is within the preset operation current interval or not;
and when the running current value is not within the preset running current interval, judging that the water pump is in an abnormal working state.
3. The detection method according to claim 2, wherein the step of determining that the water pump is in an abnormal operation state further comprises:
judging whether the running current value is lower than the lowest value in the preset running current interval or not;
and when the running current value is lower than the lowest value in the preset running current interval, judging that the water pump is in a water-deficient working state.
4. The detection method according to claim 1, wherein the operating current data includes a starting current value, the starting current value is a current value when the water pump is started, the preset operating current data interval includes a preset starting current interval, and the preset starting current interval represents a range of the current value when the water pump is started under a condition with a rated load, and the detection method may be:
judging whether the starting current value of the water pump is within a preset starting current interval or not;
and when the starting current value is not within the preset starting current interval, judging that the water pump is in an abnormal working state.
5. The detection method according to claim 4, wherein the step of determining that the water pump is in an abnormal operation state further comprises:
judging whether the starting current value is lower than the lowest value in the preset starting current interval or not;
and when the starting current value is lower than the lowest value in the preset starting current interval, judging that the water pump is in a water-deficient working state.
6. A water machine, characterized in that the water machine implements the detection method according to any one of claims 1 to 5, and comprises a controller, a current sensor, a start-stop switch and a water pump, wherein the controller is electrically connected with the current sensor and the start-stop switch respectively, and the current sensor is arranged between the start-stop switch and the water pump;
the water pump is characterized in that the start-stop switch is used for closing or breaking the electric connection between the water pump and the driving power supply, the driving power supply is used for driving the water pump to work, the current sensor is used for detecting working current data during the working of the water pump and transmitting the working current data to the controller, the controller judges whether the working current data are not in a preset working current data interval, the preset working current data interval represents the range of the current data of the water pump working under the condition of rated load, when the working current data are not in the preset working current data interval, the controller judges that the water pump is in an abnormal working state and controls the start-stop switch to break the electric connection between the water pump and the driving power supply.
7. The water machine according to claim 6, characterized in that the start-stop switch is a triode or a MOS tube.
8. The water machine of claim 6, further comprising a prompt alarm electrically connected to the controller, wherein when the controller determines that the water pump is in an abnormal working state, the controller is further configured to control the prompt alarm to send a prompt or alarm message.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109737071B (en) * | 2019-01-14 | 2021-02-09 | 湘潭大学 | Clean water pump capable of preventing abnormal use |
| CN111608898B (en) * | 2019-02-22 | 2021-12-14 | 佛山市顺德区美的电热电器制造有限公司 | Operation control method and system of liquid extracting pump, cooking appliance and readable storage medium |
| CN110332102B (en) * | 2019-07-23 | 2021-08-20 | 珠海格力电器股份有限公司 | Control method and device of automatic emptying water pump, corresponding equipment and storage medium |
| CN110469516B (en) * | 2019-08-21 | 2021-03-05 | 东莞市有意思电子科技有限公司 | Control method for realizing automatic constant pressure of water pump by detecting current load |
| CN110342612A (en) * | 2019-08-22 | 2019-10-18 | 广东叮咚净水科技有限公司 | The water shortage detection device of water purifier |
| CN110985654B (en) * | 2019-12-27 | 2021-07-30 | 盛瑞传动股份有限公司 | Electric pump load control method for automatic gearbox |
| CN111157816A (en) * | 2019-12-31 | 2020-05-15 | 宁波奥克斯电气股份有限公司 | Failure detection method and device for water inlet valve and steam box |
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