CN113940567A - Water inflow detection method of wheaten food machine and wheaten food machine - Google Patents

Abstract

The invention discloses a method for detecting water inflow of a wheaten food machine and the wheaten food machine, wherein the method comprises the steps of detecting whether a water inflow mode is started or not, wherein the water inflow mode comprises dough kneading water inflow or dough making water inflow; if so, starting the water pump to operate and detecting the water inflow of the stirring cup. The embodiment of the invention discloses a method for detecting water inflow of a wheaten food machine and the wheaten food machine, which can improve the production power of the wheaten food machine.

Description

Water inflow detection method of wheaten food machine and wheaten food machine

Technical Field

The invention relates to the field of kitchen appliances, in particular to a method for detecting water inflow of a wheaten food machine and the wheaten food machine.

Background

At present, a wheaten food machine, such as an automatic water adding noodle machine, is generally provided with a built-in water tank to provide water source for making noodles, and a water pump automatically adds water after flour is added, so that the aim of automatically making noodles is fulfilled. When the water tank is lack of water, a user needs to be prompted to give an alarm of water shortage, and the problems that the noodle making fails due to water shortage, the dry powder damages the die head and the like are solved. Therefore, water inflow detection is required, and the existing water inflow detection schemes generally include:

1. the float valve is combined with an external magnetic control switch, or a floating ball structure is adopted, the float valve and the floating ball are arranged in the water tank and can float along with the rising and the lowering of the water level, and when the water level is lowered to a certain degree, the magnetic control switch or a related structure gives a switch signal, so that the water shortage alarm is prompted.

2. By using a contact or non-contact capacitance type water level sensor, the water level is judged by judging the capacitance value when the water tank has water or does not have water, and the capacitance value detected by the sensor is different.

3. A water pump working current detection circuit is added, and whether water exists or not is judged according to the difference between the current no-load and the current of the load.

4. And (4) detecting and judging whether the air pumping is performed or not by using a flow meter.

However, the above solutions have the following disadvantages:

1. the floating stop valve and other structures are arranged in the water tank and are contacted with a water source for a long time, so that bacteria are easy to breed and water quality is influenced.

2. The detection equipment for installing the sensor and the like has complex structure and high cost.

3. The capacitance type water level sensor is easily influenced by the ambient temperature and the like, and has poor reliability.

4. The scheme for detecting the current of the water pump needs an additional current detection circuit, and the cost is high.

Disclosure of Invention

In a first aspect, an embodiment of the present application provides a method for detecting water inflow of a pasta machine, where the pasta machine includes a base and a stirring assembly disposed on the base, a motor is disposed in the base, the stirring assembly includes a stirring cup, a stirrer, a cup cover, and the pasta machine further includes a water tank, a water pump for pumping water from the water tank, and a hall element for detecting a rotation speed of the water pump, and the method includes:

detecting whether a water inlet mode is started or not, wherein the water inlet mode comprises dough mixing water inlet or dough making water inlet;

if yes, the water pump is started to operate, and the water inflow of the stirring cup is detected.

In a second aspect, the embodiment of the application provides a wheaten food machine, which comprises a base and a stirring assembly arranged on the base, wherein a motor is arranged in the base, the stirring assembly comprises a stirring cup, a stirrer and a cup cover, the wheaten food machine further comprises a water tank, a water pump used for pumping water from the water tank and a Hall element used for detecting the rotating speed of the water pump; the pasta machine further comprises a main control chip used for executing the water inlet detection method of the pasta machine according to any embodiment of the first aspect.

Compared with the prior art, the water inlet detection method of the wheaten food machine and the wheaten food machine provided by at least one embodiment of the application have the following beneficial effects: when the flour machine and the flour enter water or the flour making machine enters water, the main control chip controls the water pump to operate and detects the water inflow of the stirring cup, the volume of liquid added into the stirring cup of the flour machine can be known in real time, the flour machine making power is improved, and the user experience is further improved.

In some embodiments of the present application, the following effects can also be achieved:

1. in the process of dough kneading water inflow or dough making water inflow, whether the water tank is filled with water or not is judged through the pulse width output by the Hall element when the water pump operates, so that the phenomenon that the water inflow of the stirring cup is deviated from the required water inflow due to water shortage in the dough kneading water inflow or dough making water inflow process to influence the strength or the forming of the prepared wheaten food can be avoided.

2. The water pump is used for detecting the idle pumping and load state of the water pump through the Hall element which is arranged on the existing structural water pump and used for controlling the water quantity, extra hardware cost is not needed, the idle pumping and load state can be realized only by detecting the pulse width through software, the water shortage alarm effect is achieved, and the water pump is simple in structure and low in cost. In addition, the embodiment has no structure built in the water tank, so that water pollution is reduced.

3. The pulse width of the water pump based on big data test is that the pulse width in a preset time period is adopted, the arrays are stored for many times, each pulse width array comprises a plurality of pulse widths, and whether water exists or not is judged through the pulse widths in the pulse width arrays, so that abnormal values can be weakened, the judgment accuracy is guaranteed, and the judgment reliability is enhanced.

4. Because the difference of water pump and components and parts, the pulse width can be different when the water pump of different wheaten food machines is pumped to the water, and this embodiment is through combining the self-cleaning function of production line, realizes the automatic calibration of the empty load pulse width interval of pumping of every wheaten food machine, and reducible erroneous judgement improves and detects the reliability.

5. The pulse width group number N and the value of each group of pulse width number N can be determined according to the pressure of liquid at the inlet and the outlet of the water pump, so that the effects of dust resistance and the like can be eliminated when the water pump works, water in the water inlet pipeline and the water outlet pipeline can be actually pumped, invalid data is filtered and then judgment is carried out, and misjudgment is reduced.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

FIG. 1 is a flow chart of a method for detecting water inflow of a pasta machine according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of a water pump driving module according to an embodiment of the present invention;

FIG. 3 is a schematic block diagram of water pump pulse detection provided by an embodiment of the present invention;

FIG. 4 is a schematic circuit diagram of water pump pulse detection according to an embodiment of the present invention;

FIG. 5 is a flow chart of a method for detecting water inflow of a pasta machine according to an embodiment of the present invention;

fig. 6 is a flow chart of water pump pulse width calibration according to an embodiment of the present invention.

Detailed Description

The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.

The embodiment of the invention provides a wheaten food machine which comprises a base and a stirring assembly arranged on the base, wherein a motor is arranged in the base, and the stirring assembly comprises a stirring cup, a stirrer and a cup cover. Wherein, stirring cup and bowl cover cooperation form the process chamber, and the output shaft of motor stretches into the process chamber, and the agitator is located the process intracavity and connects on the output shaft of motor, and the motor starts the back and can drive the agitator and rotate to realize kneading dough, kneading dough and flour agglomeration etc. operation in the process intracavity.

In this embodiment, the wheaten food machine can also include the water tank, be used for drawing water the water pump and the hall element that detects the water pump rotational speed from the water tank, and accessible water pump is with the water pumping in the water tank in the processing intracavity, realizes the automatic intaking of wheaten food machine.

In this embodiment, the pasta machine may further include a main control chip, and the main control chip is configured to execute the method for detecting water inflow of the pasta machine provided in the embodiment of the present invention, and a specific execution process of the method may be described in the following embodiments. The main control chip may be a single chip microcomputer (MCU for short).

Based on the pasta machine shown in the above embodiment, an embodiment of the present invention further provides a method for detecting water inflow of the pasta machine, fig. 1 is a flowchart of a method for detecting water inflow of the pasta machine provided in an embodiment of the present invention, and as shown in fig. 1, the method for detecting water inflow of the pasta machine provided in this embodiment may have an execution main body which may be a main control chip, and may include the specific steps of:

s101: and detecting whether a water inlet mode is started or not, wherein the water inlet mode comprises dough mixing water inlet or dough making water inlet.

In practical application, when the flour machine is used for kneading or making the flour, liquid (such as water, egg liquid or vegetable juice and the like) is required to be added into the stirring cup (or the processing cavity) so as to complete kneading or making the flour. The automatic water-feeding system comprises a water tank, a water pump and the like which are generally arranged in a wheaten food machine such as a noodle maker, so that liquid (such as water, egg liquid or vegetable juice) in the water tank is automatically pumped into a stirring cup to be stirred with food materials (such as flour, rice flour, corn flour or starch) poured into the stirring cup in advance to be made into wheaten food such as noodles or dumpling wrappers.

However, the automatic water inlet system arranged in the pasta machine has the following characteristics compared with the automatic water inlet system in other devices (such as a full-automatic intelligent electric cooker or a food processor and the like): the volume of the liquid added into the stirring cup of the wheaten food machine directly influences the strength or the forming of the wheaten food, and is the key for judging whether the wheaten food machine is successfully made. Therefore, the precision requirement of the liquid volume added into the stirring cup of the pasta machine is very high; the amount of the liquid added by the automatic water inlet system in other devices only affects the taste (such as thickening or dilution) of the prepared food, and the precision requirement on the added liquid volume is relatively low.

In the embodiment, the processing mode of the pasta machine can be monitored in real time during the working process of the pasta machine so as to judge whether the pasta machine starts the water inlet mode or not. In one example, whether the dough kneading button or the dough making button is triggered or not can be monitored in real time, and if the dough kneading button or the dough making button is triggered, the water inlet mode of the pasta machine is determined to be started.

S102: if so, starting the water pump to operate and detecting the water inflow of the stirring cup.

In the embodiment, when the water inlet mode of the wheaten food machine is monitored, namely automatic water inlet is needed, the main control chip can control the operation of the water pump and detect the water inlet amount of the stirring cup, the volume of liquid added into the stirring cup of the wheaten food machine can be known in real time, the wheaten food machine making power is improved, and further the user experience is improved.

In one example, the water inflow of the stirring cup can be detected by the main control chip in cooperation with the flow meter. In this embodiment, the flowmeter can feed back the water yield through hall pulse signal to detect the inflow of stirring cup.

In one example, the water inflow of the mixing cup can be detected by the main control chip in cooperation with the fixed volume of the pipeline. In this embodiment, the volume of the water inlet pipe between the water tank and the stirring cup can be selected as the minimum calculation unit of the water inflow of the stirring cup, and the total volume of the water inflow of the stirring cup can be obtained by accumulating for multiple times according to the pumping times of the water pump.

In this embodiment, the main control chip can adopt the prior art to control the operation of the water pump, for example, the main control chip can control the operation of the water pump through the water pump driving module. Fig. 2 is a schematic circuit diagram of a water PUMP driving module according to an embodiment of the present invention, and as shown in fig. 2, the water PUMP driving module may include an optical coupler U101 and a Metal oxide Semiconductor field effect transistor (MOS) Q101, a P _ PUMP end of the optical coupler U101 is connected to an input/Output (I nput/Output, I/O) port of a main control chip, and the main control chip controls on/off of the MOS Q101 through a high-low level of the IO port, so as to drive start and stop of a water PUMP.

In fig. 2, CN101 is a terminal for connecting a water pump. D101 is a freewheeling diode to prevent the back electromotive force generated when the water pump is turned off from breaking down the MOS tube. R101 or R102 is a pull-up resistor, ensures that the level of a port is high, and simultaneously plays a role of a current-limiting resistor. R103 is a grid resistance, changes the gradient of the front and back edges of the input control pulse of the grid of the MOS tube, and prevents the oscillation formed by parasitic capacitance and inductance. R104 is a leakage resistor for eliminating static electricity, preventing MOS tube from being started by mistake due to leakage current or interference, and increasing circuit reliability

According to the water inflow detection method of the wheaten food machine, provided by the embodiment of the invention, when the wheaten food machine and the flour enter water or the flour making machine enters water, the main control chip controls the water pump to operate and detects the water inflow of the stirring cup, so that the volume of liquid added into the stirring cup of the wheaten food machine can be known in real time, the high making power of the wheaten food machine is improved, and the user experience is further improved.

In an exemplary embodiment of the present invention, when detecting the water inflow of the mixing cup, the method may further include: monitoring the pulse width output by the Hall element in the running process of the water pump; and judging whether the water tank is lack of water or not according to the pulse width.

In the embodiment, in the process of dough kneading water inlet or dough making water inlet, whether the water tank is filled with water is judged according to the pulse width (pulse width for short) output by the Hall element when the water pump operates, so that the situation that the water inflow of the stirring cup is deviated from the required water inflow due to water shortage in the dough kneading water inlet or dough making water inlet process to influence the chewiness or the forming of the prepared wheaten food can be avoided.

Fig. 3 is a schematic block diagram of water pump pulse detection provided by the embodiment of the present invention, and fig. 4 is a schematic circuit diagram of water pump pulse detection provided by the embodiment of the present invention, as shown in fig. 3 and fig. 4, a HALL element 4 may be installed on a water pump 1, for example, at the tail of the water pump, and a HALL element port hal is connected to a main control chip. The Hall element U201 detects the on-off of the water pump pulse and transmits the detected signal to the main control chip. The main control chip controls the start and stop of the water pump according to the signal output by the Hall element, processes the feedback information of the pulse signal and the like. As shown in fig. 2, the water pump 1 is further provided with a water inlet 2 and a water outlet 3.

In practical application, when the water pump works, the Hall element detects that the pulse width has a large difference between the load pulse width and the no-load pulse width. In this embodiment, through the pulse width who detects the water pump operation in-process hall element, can judge that the pipeline has or not taken out water to carry out the water shortage warning.

In practical application, the water pump is powered by 12V, the pulse width of the water pump in one period can be 8-10 ms during air pumping, and the pulse width of the water pump in one period can be 13-15 ms during load pumping. In this embodiment, the water pump is started and then the pulse width sampling is performed, and the pulse width of the hall element pulse cycle is different between the working state of the water pump and the load state, so as to detect whether water is short. For example, if the pulse width is in the load pulse interval, it is determined that water is present, and if the pulse width is not in the load pulse interval, it is determined that no-load abnormality occurs, and an alarm is given for water shortage.

This embodiment utilizes water pump and original hall element, only needs the software timer to increase a time sampling, and outside interruption increases a pulse number count, judges according to pulse width that lack of water still has water, does not need extra hardware cost, only need software detect the pulse width realize empty take out with load state can, and need not to embed detection device such as floating stop valve in the water tank.

In fig. 3, CN201 is a terminal, and is used for connecting to the main control chip to input the detected hall signal to the main control chip. R106 and R107 are current limiting resistors, and R106 and R107 are connected in parallel, so that the heating of the resistors can be reduced.

According to the water inlet detection method of the pasta machine, provided by the embodiment of the invention, the idle pumping and load states of the water pump are detected by the Hall element which is arranged on the water pump and used for controlling the water quantity in the existing structure, extra hardware cost is not needed, the idle pumping and load states are realized by detecting the pulse width through software, the water shortage alarm effect is achieved, the structure is simple, and the cost is low. In addition, the embodiment has no structure built in the water tank, so that water pollution is reduced.

In an exemplary embodiment of the present invention, determining whether there is a water shortage in the water tank according to the pulse width may include: and acquiring the pulse width in a preset time period, and judging whether the water tank is short of water or not according to the pulse width in the preset time period.

In the embodiment, the pulse width of the water pump based on big data testing is that the pulse width in a preset time period is adopted, the arrays are stored for multiple times, each pulse width array comprises multiple pulse widths, the abnormal values are weakened by dynamically shifting and storing the real-time data of the arrays, and the abnormality is taken for multiple times, so that the accuracy of judgment is ensured, the misjudgment is reduced, and the reliability of judgment is enhanced.

The preset time period may be set according to an empirical value or a simulation result, and may be, but is not limited to, about 1.75 s.

In an example, fig. 5 is a flowchart of a water inlet detection method of a pasta machine according to an embodiment of the present invention, and as shown in fig. 5, the method may specifically include:

s501: and judging whether the water pump is started or not. If yes, go to S502; otherwise, continuing to judge.

S502: and (4) storing the falling edge pulse widths of the sampled continuous Hall signals into an array, filtering a plurality of groups of data, and comparing the filtered data with a threshold value set by a program (continuously judging in the working process).

S503: and judging whether the pulse width is in the load pulse width interval. If yes, go to S502; otherwise, S504 is executed.

S504: and (5) water shortage alarm.

In this embodiment, gather the pulse width in the predetermined time quantum, whether lack of water in the judgement water tank according to the pulse width in the predetermined time quantum can include:

acquiring N pulse width arrays in a preset time period, wherein each pulse width array comprises N pulse widths, N is more than or equal to 1, and N is more than 1; judging whether each pulse width array meets the pulse width condition; and when the a pulse width arrays do not meet the pulse width condition, judging that the water in the water tank is short of water, wherein a is more than 0 and less than or equal to n.

In this embodiment, the water pump is started and then the pulse value sampling and filtering is performed, and if the filtering value is in the load pulse interval, it is determined that water is present, and if the filtering value is not in the pulse interval, it is determined that no-load abnormality occurs, and an alarm is given to water shortage. The filtering method comprises the following steps:

the falling edge pulse recording time collected by the Hall element is selected, N records are collected once, N can select 3-X pulse widths according to actual needs, and a plurality of pulse widths are taken once to ensure accuracy and eliminate abnormal conditions. In this case, X may be, but is not limited to, recording pulse width data once in 7 pulse periods, where one pulse period corresponds to one pulse width.

The collected pulse width is stored in a number a 1, and a next pulse width is continuously taken out and stored in an array a 2, and so on, and stored in an array a n. In this embodiment, n may be set according to an empirical value or a simulation result, and n may be, but is not limited to, 5 to 20.

And judging each pulse width array, judging whether the pulse width array meets the pulse width condition or not, determining the number of the pulse width arrays which do not meet the pulse width condition, and judging that the water tank is lack of water when the a pulse width arrays do not meet the pulse width condition.

The value of a can be determined according to n, the value of a can be more than 0 and less than or equal to n, namely, if at least one pulse width array does not meet the pulse width condition, water shortage is judged. In one example, a can be determined according to the sampling theorem, and a only needs to satisfy n/2 < a ≦ n, so that the judgment accuracy can be improved.

In this embodiment, the number of pulse width arrays that do not meet the pulse width condition may be recorded by a counter, an initial value of the counter may be 0, the N pulse width arrays may be sequentially determined from small to large according to the sampling time, when the current pulse width array meets the pulse width condition, the next pulse width array may be continuously determined, an abnormal value of the counter remains unchanged, when the current pulse width array does not meet the pulse width condition, the counter records an abnormal value +1, and when the abnormal value is added to a, a water shortage alarm is performed, and the water pump stops working. And when the N pulse width arrays are judged and the number of the pulse width arrays which do not accord with the pulse width condition is less than a, judging that the water tank has water, and synchronously clearing the abnormal value to be 0.

In one example, determining whether each pulse width array meets the pulse width condition may include:

comparing the N pulse widths in each pulse width array with a preset pulse width interval respectively, wherein the preset pulse width interval comprises a first pulse width interval for judging whether water exists and a second pulse width interval for judging whether water does not exist; and when the m pulse widths are within the first pulse width interval, judging that the pulse width array meets the pulse width condition, otherwise, judging that the pulse width array does not meet the pulse width condition, wherein N/2 is more than m and less than or equal to N.

In this embodiment, when determining whether each pulse width array meets the pulse width condition, N pulse widths in each pulse width array may be compared with a first pulse width interval (i.e., a load pulse width interval), and if at least m elements in the current pulse width array a [ N ] are in the first pulse width interval, it is determined that the current pulse width array meets the pulse width condition. And if the number of elements in the first pulse width interval in the current pulse width array a [ n ] is less than m, judging that the current pulse width array does not meet the pulse width condition.

In an example, when determining whether each pulse width array meets the pulse width condition, N pulse widths in each pulse width array may be compared with a second pulse width interval (i.e., no-load pulse width interval), and if at least m elements in the current pulse width array a [ N ] are in the second pulse width interval, it is determined that the current pulse width array does not meet the pulse width condition. And if the number of elements in the second pulse width interval in the current pulse width array a [ n ] is less than m, judging that the current pulse width array meets the pulse width condition.

And if m is greater than 0 and less than or equal to N, that is, at least one pulse width satisfies the first pulse width interval, or at least one pulse width does not satisfy the second pulse width interval, determining that the pulse width array where the pulse width is located satisfies the pulse width condition. In one example, m can be determined according to the sampling theorem, and m only needs to satisfy N/2 < m ≦ N, so that the judgment accuracy can be improved.

In an example, the method for detecting water inflow of the pasta machine provided in this embodiment may further include: determining the values of N and N according to the pressure of liquid at the inlet and the outlet of the water pump; wherein N is 5 and N is 7.

In practical application, because the water pump structure is provided with the influence of the length of a pipeline and the pull resistance, the formula H is (p2-p 1)/rho g + (v 2)²-v1²) 2g + z2-z1, wherein H represents the head and can be in meters (m); p1 and p2 represent the pressure of the liquid at the water inlet and outlet of the water pump, respectively, and the unit can be Pa; v1 and v2 represent the flow rates of the fluid at the water inlet and outlet of the water pump, respectively, and can be in m/s;z1 and z2 represent the height of the water inlet and outlet of the water pump, respectively, and can be m; rho represents the density of the liquid in kg/m³(ii) a g represents gravity acceleration and can be in m/s²。

In the current structure, except for the parameters p1 and p2, which are known constants, the two variables p1 and p2 cause an initial state abnormity confirmation in the process of pumping the water pump from the water tank to the water outlet, which is divided into the following different states: (1) water is filled in the water tank, and the water tank is empty of water; (2) water is filled in the water tank, and water is filled in the water pipe; (3) the water tank has no water, and the water pipe has water; (4) the water tank has no water, and the water pipe has no water; and other abnormal conditions such as the influence of bubble water in the water pipe, the locked-rotor of the water pump or the locked-rotor of the water outlet and the like.

In this embodiment, can confirm the value of N and N according to the pressure of water pump import department and exit liquid, generally get 7 pulse width (being N7), the scheme of 5 pulse width array (being N5), can reach the water pump at the during operation, get rid of influences such as raise dust resistance, can actually take out the water in inlet channel and the outlet conduit, judge after the filtering invalid data, reduce the misjudgement.

In this embodiment, every 7 pulse widths are used as a group, 5 pulse width arrays are collected in total, that is, there are 7 elements in one array, the elements in a 1-a 5 are collected, updated, shifted and stored in real time, the value of m can be 4, the value of a can be 3, 4 of the 7 elements in the array are not in the first pulse width interval each time, it is determined that the array does not meet the pulse width condition, if there are 3 groups of data that do not meet the pulse width condition, it is determined that water is short and an alarm is given, otherwise, the determination is continued.

According to the water inlet detection method of the pasta machine, provided by the embodiment of the invention, the pulse width of the water pump is tested based on big data, namely the pulse width in a preset time period is adopted, the groups are stored for many times, each pulse width group comprises a plurality of pulse widths, and the existence of water is judged through the plurality of pulse widths in the groups of pulse width groups, so that abnormal values can be weakened, the judgment accuracy is ensured, and the judgment reliability is enhanced.

In an exemplary embodiment of the present invention, determining whether there is a water shortage in the water tank according to the pulse width may include: and comparing the pulse width with a preset pulse width interval, and judging whether the water tank is short of water or not according to a comparison result.

In this embodiment, after the water pump is started, the pulse value is sampled, the pulse width of the water pump collected by the hall element in one period is recorded, and the pulse width in the period is directly compared with a preset pulse width interval to judge water shortage.

In one example, the preset pulse width interval may include a first pulse width interval for water presence determination and a second pulse width interval for water absence determination; compare pulse width and preset pulse width interval, judge whether lack of water in the water tank according to the comparison result, can include:

comparing the pulse width with a first pulse width interval and a second pulse width interval respectively; when the pulse width is in a first pulse width interval, judging that water exists in the water tank; and when the pulse width is in the second pulse width interval, judging that no water exists in the water tank.

In an exemplary embodiment of the present invention, the method for detecting water inflow of a pasta machine provided in this embodiment may further include: when the wheaten food machine enters a preset mode, a preset pulse width interval is determined, and the preset mode comprises an automatic cleaning function.

In practical application, in the factory big data touch measurement of the water pump, when a single water pump is in no-load and load, the pulse width is different, and the difference of the pulse width is consistent when the water pump is tested under different conditions. For example, due to differences between the water pump and each component, when water is pumped, the load pulse width interval of the water pump is different. Or the relation between the working pulse of the water pump and the working voltage of the water pump is relevant, and the corresponding working pulse is different when the working voltage of the water pump adopts 5V and 12V. Therefore, since the working pulses of the water pumps are different under different conditions (for example, under different voltages or different models), if the preset pulse width interval for judgment is fixed or preset, there is a misjudgment.

In this embodiment, a preset mode may be entered before the pasta machine leaves a factory, for example, a function of automatically cleaning a pipeline, and a preset pulse width interval is calibrated to determine a load pulse width interval or a no-load pulse width interval corresponding to the water pump under different conditions (for example, under different voltages or different models), so as to reduce a false rate.

In one example, determining the preset pulse width interval may include: when the water quantity in the water tank is larger than a preset threshold value, controlling the water pump to operate, monitoring the pulse width output by the Hall element, and marking the pulse width as a first calibration pulse width; when the water tank is empty of water, the water pump is controlled to operate, and meanwhile, the pulse width output by the Hall element is monitored and marked as a second calibrated pulse width; and when the first nominal pulse width is not equal to the second nominal pulse width, determining the first nominal pulse width as a first pulse width interval, and determining the second nominal pulse width as a second pulse width interval.

In this embodiment, each pasta machine can be calibrated, and the automatic cleaning function is used for judgment, so that the load pulse width interval (first pulse width interval) is automatically calibrated when water is pumped, and the no-load pulse width interval (second pulse width interval) is automatically calibrated when water is not pumped.

Fig. 6 is a flow chart of water pump pulse width calibration according to an embodiment of the present invention, and as shown in fig. 6, the flow chart may specifically include:

s601: under the automatic cleaning function, the water tank is filled with water and the water pump starts to work.

In this embodiment, after entering the calibration procedure, the automatic cleaning function is first turned on to calibrate the water pump load pulse width interval. The default of the automatic cleaning function is 200g of water outlet, and the working time is about 45 s.

S602: and judging whether the Hall element starts to detect the pulse and transmitting the pulse to the MCU. If yes, executing S603; otherwise, S601 is executed.

S603: the MCU continuously measures the pulse width.

S604: and metering stable Q pulse widths.

In this embodiment, in S602 to S604, after the water pump is started to operate, the pulse width starts to be recorded, and 45S is reached, so as to obtain stable Q pulse widths, where Q is a positive integer, and the filtering average value is recorded as a first calibration pulse width.

S605: the water in the water tank is poured to be dry, and the water pump runs in no-load mode.

In the embodiment, the whole machine is not powered off, water in a water pipe is drained at the same time, water in a water tank is not filled, and the automatic cleaning function is selected to pump for 45 s.

S606: it is determined whether to measure Q valid stable pulse widths. If yes, go to S607; otherwise, S604 is performed.

In this embodiment, when the water pump is pumping, the pulse width starts to be recorded, and the time is up to 45s, so as to obtain stable Q pulse widths, where Q is a positive integer, and the filtering averaging is recorded as the second calibration pulse width.

S607: and comparing whether the pulse width is unequal under the vacuum pumping state and the load state. If yes, go to S608; otherwise, S609 is executed.

S608: the currently measured pulse width is recorded.

S609: and if the calibration fails, re-calibrating.

In this embodiment, the first calibrated pulse width is compared with the second calibrated pulse width, and if the two pulse widths are equal, the calibration fails, and if the two pulse widths are not equal, the 2 pulse widths are respectively stored in the EEPROM for use in water shortage determination when the pasta machine and the noodle feeding water or the noodle making water feeding water.

In this embodiment, after the pasta machine leaves the factory, a user compares the stored pulse width with the currently acquired pulse width after the water pump is turned on in the use process, and if the acquired pulse width is in the second pulse width interval, an alarm is given to water shortage, and if the acquired pulse width is in the first pulse width interval, normal operation is continued.

In this embodiment, the water pump can adopt 12V voltage power supply, and the power supply fluctuation is less than 0.1V in actual test, and stability is better.

According to the method for detecting the water inflow of the pasta machine, provided by the embodiment of the invention, due to the difference between the water pump and the components, the pulse width of the water pumped to the water by the water pump of different pasta machines is different, and the embodiment realizes the automatic calibration of the pumping and no-load pulse width interval of each pasta machine by combining the automatic cleaning function of the production line, so that the misjudgment can be reduced, and the detection reliability can be improved.

In an exemplary embodiment of the present invention, when detecting the water inflow of the mixing cup, the method may further include: and detecting the difference value between the existing water inflow and the required water inflow of the stirring cup in the last time period of the water inflow mode, and judging whether the water tank is lack of water or not when the difference value is less than 10 g.

In practical application, the pasta machine can successfully prepare pasta by reverse protection, clamp protection or other modes under the condition that the water amount is less than 10g, and can enter the clamp protection even if the pasta machine fails. In this embodiment, at the final stage of the automatic water adding amount required by the current function, if the water shortage amount is less than or equal to 10g, the water shortage determination is not performed, so that the problems of poor user experience and the like caused by water shortage alarm can be reduced.

The method for detecting the water inflow of the wheaten food machine provided by the embodiment of the invention can be popularized and applied to other food processing machines such as a self-cleaning wall breaking machine or steam air-frying machine, has more obvious advantages than the wheaten food machine, has higher requirement on the precision of the water amount of the wheaten food machine, does not influence the overall performance when other product schemes have the deviation of the precision of the water amount of 10g, and has high feasibility.

It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

Claims (10)

1. The water inlet detection method of the wheaten food machine comprises a base and a stirring assembly arranged on the base, wherein a motor is arranged in the base, the stirring assembly comprises a stirring cup, a stirrer and a cup cover, the wheaten food machine further comprises a water tank, a water pump used for pumping water from the water tank and a Hall element used for detecting the rotating speed of the water pump, and the water inlet detection method is characterized by comprising the following steps of:

detecting whether a water inlet mode is started or not, wherein the water inlet mode comprises dough mixing water inlet or dough making water inlet;

if yes, the water pump is started to operate, and the water inflow of the stirring cup is detected.

2. The method of claim 1, wherein upon detecting the water inflow of the blender cup, the method further comprises:

monitoring the pulse width output by the Hall element in the running process of the water pump;

and judging whether the water tank is lack of water or not according to the pulse width.

3. The method of claim 2, wherein said determining if there is a water shortage in the tank based on the pulse width comprises:

acquiring the pulse width in a preset time period, and judging whether the water tank is short of water or not according to the pulse width in the preset time period;

alternatively, the first and second electrodes may be,

and comparing the pulse width with a preset pulse width interval, and judging whether the water tank is short of water or not according to a comparison result.

4. The method of claim 3, wherein the step of collecting the pulse width within a preset time period and determining whether the water tank is short of water according to the pulse width within the preset time period comprises:

acquiring N pulse width arrays in a preset time period, wherein each pulse width array comprises N pulse widths, N is more than or equal to 1, and N is more than 1;

judging whether each pulse width array meets the pulse width condition;

and when the a pulse width arrays do not meet the pulse width condition, judging that the water in the water tank is deficient, wherein a is more than 0 and less than or equal to n.

5. The method of claim 4, wherein the determining whether each pulse width array meets the pulse width condition comprises:

comparing the N pulse widths in each pulse width array with a preset pulse width interval respectively, wherein the preset pulse width interval comprises a first pulse width interval for judging whether water exists and a second pulse width interval for judging whether water does not exist;

and when the m pulse widths are within the first pulse width interval, judging that the pulse width array meets the pulse width condition, otherwise, judging that the pulse width array does not meet the pulse width condition, wherein N/2 is more than m and less than or equal to N.

6. The method according to claim 4 or 5, characterized in that the method further comprises:

determining the values of N and N according to the pressure of liquid at the inlet and the outlet of the water pump;

wherein N is 5 and N is 7.

7. The method of claim 3, wherein the preset pulse width intervals comprise a first pulse width interval for a water presence determination and a second pulse width interval for a water absence determination;

compare pulse width and preset pulse width interval, judge according to the comparison result whether lack of water in the water tank includes:

comparing the pulse width with the first pulse width interval and the second pulse width interval respectively;

when the pulse width is in the first pulse width interval, determining that water exists in the water tank;

and when the pulse width is in the second pulse width interval, determining that no water exists in the water tank.

8. The method according to claim 5 or 7, characterized in that the method further comprises:

and when the wheaten food machine enters a preset mode, determining the preset pulse width interval, wherein the preset mode comprises an automatic cleaning function.

9. The method of claim 8, wherein the determining the preset pulse width interval comprises:

when the water quantity in the water tank is larger than a preset threshold value, controlling the water pump to operate, monitoring the pulse width output by the Hall element, and marking the pulse width as a first calibration pulse width;

when the water tank is empty of water, the water pump is controlled to operate, and meanwhile the pulse width output by the Hall element is monitored and marked as a second calibrated pulse width;

and when the first calibration pulse width is not equal to the second calibration pulse width, determining the first calibration pulse width as the first pulse width interval, and determining the second calibration pulse width as the second pulse width interval.

10. The wheaten food machine is characterized by comprising a base and a stirring assembly arranged on the base, wherein a motor is arranged in the base, the stirring assembly comprises a stirring cup, a stirrer and a cup cover, the wheaten food machine further comprises a water tank, a water pump used for pumping water from the water tank and a Hall element used for detecting the rotating speed of the water pump; the pasta machine further comprises a main control chip for executing the water inlet detection method of the pasta machine according to any of claims 1-9.

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