CN114129073B - Water shortage detection method of food processor and food processor - Google Patents
Water shortage detection method of food processor and food processor Download PDFInfo
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- CN114129073B CN114129073B CN202010916001.6A CN202010916001A CN114129073B CN 114129073 B CN114129073 B CN 114129073B CN 202010916001 A CN202010916001 A CN 202010916001A CN 114129073 B CN114129073 B CN 114129073B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/046—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven with tools driven from the bottom side
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Abstract
The embodiment of the invention discloses a water shortage detection method of a food processor and the food processor, and the method comprises the steps of detecting a resistance value between two electrodes and comparing the resistance value with a resistance threshold value; when the resistance value is smaller than or equal to the resistance threshold value, determining the current operation function of the food processor, wherein the operation function comprises a hot state function of heating the steam generator and a cold state function of not heating the steam generator, or the operation function comprises full-speed operation or non-full-speed operation of the water pump; determining a judging parameter according to the current running function, and secondarily judging whether the water tank is water or not according to the judging parameter. The water shortage detection method of the food processor and the food processor disclosed by the embodiment of the invention can improve the reliability of anhydrous detection.
Description
Technical Field
The present invention relates to the field of kitchen appliances, and more particularly, to a water shortage detection method for a food processor and a food processor.
Background
The food processor generally uses heating pipe or electromagnetic heating mode, directly heats or decocts the material, and the heating container high temperature leads to the material adhesion on the container wall easily, leads to paste the pipe problem, not only influences the drink taste, and the user washs troublesome moreover. In addition, with the multifunction of the food processor, the single heating mode cannot meet the technological requirements of the current multifunctional recipes.
Therefore, a heating technology using steam heating appears in some food processors, and the problem of heating paste pipes of the food processors can be solved by using steam heating, and the heating requirements of cooking with different functions can be met. Because the principle of steam heating is to utilize steam to heat the material, consequently need relate to water inlet module design and water level detection to guarantee steam heating's reliability, prevent the heating module dry combustion method.
Some techniques use metal electrodes for water level detection at lower cost than using flow meters or pressure sensors. The principle of detecting the water level by the metal electrode is to judge whether water exists or not by detecting the change of the resistance value between the two electrodes, but the water in the market is various at present, and the resistance values of various kinds of water are different, in particular mineral water and distilled water. Mineral water has a high mineral content, but distilled water has a very high electrical resistance because of the substantial absence of minerals in water. After a user uses mineral water for a long time, the resistance value of the electrode when no water exists is close to the resistance value of the electrode when distilled water exists due to the pollution of the pipeline, if whether water exists is judged by only the resistance value of the electrode, the phenomenon of misjudgment that the water exists when no water exists is judged, and the detection reliability is low.
Disclosure of Invention
In a first aspect, an embodiment of the present application provides a water shortage detection method of a food processor, the food processor includes a base and a processing assembly disposed on the base, the processing assembly includes a cup body, a smashing device and a cup cover, the cup body and the cup cover cooperate to form a processing cavity, a water tank, a water pump and a steam generator are further disposed on the base, and two electrodes are disposed on a pipeline of a water outlet of the water tank, the method includes:
detecting a resistance value between two electrodes, and comparing the resistance value with a resistance threshold value;
determining a current operating function of the food processor when the resistance value is less than or equal to the resistance threshold, the operating function including a hot state function in which the steam generator is heating and a cold state function in which the steam generator is not heating, or the operating function including full speed operation of the water pump or non-full speed operation of the water pump;
determining a judging parameter according to the current running function, wherein the judging parameter comprises a steam generator, the resistance value or a water pump, and carrying out secondary judgment on whether the water tank is water or not according to the judging parameter.
In one example, when the current operating function is a thermal state function, the determination parameter is a temperature of the steam generator.
In an example, the secondary determining whether the water tank is water or not according to the determining parameter includes:
detecting the temperature of the steam generator, and comparing the temperature of the steam generator with a temperature threshold;
and when the temperature of the steam generator is greater than the temperature threshold value, judging that no water exists in the water tank.
In an example, when the current running function is that the water pump is not operating at full speed, the determination parameter is a trend of change of the resistance value.
In an example, the secondary determining whether the water tank is water or not according to the determining parameter includes:
detecting a resistance value between two electrodes within a preset time period;
and when the resistance value continuously rises in the preset time period, judging that no water exists in the water tank.
In one example, after the secondary determination that there is no water in the tank, the method further comprises:
controlling the water pump to work at full speed, detecting the water pumping current value when the water pump works at full speed, and judging whether the water tank is water or not for three times according to the water pumping current value;
and when the water pumping current value is smaller than the current threshold value, judging that no water exists in the water tank.
In an example, when the current running function is a cold state function or the water pump is operated at full speed, the determination parameter is a water pumping current value of the water pump.
In an example, the secondary determining whether the water tank is water or not according to the determining parameter includes:
detecting a pumping current value of the water pump, and comparing the pumping current value with a current threshold value;
and when the pumping current value is smaller than the current threshold value, judging that no water exists in the water tank.
In an example, the method further comprises:
when the food processor enters a first preset mode, detecting a first current value when the water pump pumps at full speed and empty, and detecting a second current value when the water pump pumps at full speed;
determining the current threshold value according to the first current value and the second current value;
when the food processor enters a second preset mode, determining a first resistance value when the electrode detects distilled water and determining a second resistance value when the electrode detects no water;
and determining the resistance threshold according to the first resistance value and the second resistance value.
In a second aspect, an embodiment of the present application provides a food processor, including a base and a processing component disposed on the base, where the processing component includes a cup body, a smashing device and a cup cover, the cup body and the cup cover cooperate to form a processing cavity, a water tank, a water pump and a steam generator are further disposed on the base, and two electrodes are disposed on a pipeline of a water outlet of the water tank;
the food processor further comprises a main control chip for executing the water shortage detection method of the food processor according to any embodiment of the first aspect.
The water shortage detection method of the food processor and the food processor provided by at least one embodiment of the application have the following beneficial effects compared with the prior art: when water exists in the water tank is judged by adopting the electrode, secondary judgment is carried out according to different modes, the phenomenon that no water is judged to be water by only the resistance value collected by the electrode is avoided, so that the reliability of no water detection is improved, an effective isolation structure is not required to be designed to ensure the reliability of electrode detection, the cost is low, and the installation is simple.
In some implementations of the embodiments of the present application, the following effects may also be achieved:
1. when the electrode detection fails, the water tank is determined to be water, and the secondary determination is performed by detecting the temperature of the steam generator, so that whether water exists in the water tank can be effectively identified, and the reliability of water-free detection is improved.
2. When the electrode detection fails, the water tank is determined to be water, and the secondary determination is performed by detecting the current value of the water pump, so that whether water exists in the water tank can be effectively identified, and the reliability of water-free detection is improved.
3. When the electrode detection fails, the water tank is judged to be water, and secondary judgment is carried out by detecting the change trend of the resistance value between the two electrodes in the preset time period, so that the existence of water in the water tank can be effectively identified, and the reliability of water-free detection is improved.
4. When the water tank is judged to be free of water for the second time by detecting the change trend of the temperature or the resistance value of the steam generator, the water pump current value when the water pump works at full speed is detected for three times, so that the existence of water in the water tank can be effectively identified, and the reliability of water-free detection is improved.
5. Through carrying out independent check-up that draws water to every food processor when dispatching from the factory, confirm the resistance threshold that different food processors correspond, can avoid accessory error, ensure the detection reliability.
In some implementations of the embodiments of the present application, the following effects may also be achieved when the thermal state function is determined secondarily:
1. the electrode is combined with the thermal state function to detect whether water exists in the water tank, so that the misjudgment phenomenon that the water exists in the water tank is judged by only the resistance value acquired by the electrode can be avoided, the problem that certain hysteresis exists in the temperature detection of the steam generator is avoided, and the reliability of the water-free detection is improved.
2. When the temperature of the steam generator exceeds the temperature threshold, the heating is stopped immediately, and the heat is dissipated through the full-speed air pumping of the water pump, so that the phenomenon that the temperature of the steam generator continuously rises to cause the protection temperature controller to trip can be avoided.
In some implementations of the embodiments of the present application, when the cold state function is determined secondarily, the following effects may also be achieved:
1. the electrode is combined with the cold state function to detect whether water exists in the water tank, so that the phenomenon that the water is judged to be in existence by only the resistance value acquired by the electrode is avoided, the problem that certain hysteresis exists in current detection of the water pump is avoided, and the reliability of water-free detection is improved.
2. When the cold state function is performed, the water pump pumps water at full speed, the current threshold value can be according to the first current value when the main control chip detects the water pump pumps water at full speed and empty when the food processor produces the water, and the second current value of the water pump when the water pump pumps water at full speed is determined, so that each water pump can be pumped and checked when leaving the factory, and the current threshold values corresponding to different water pumps are determined, thereby ensuring the detection reliability
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 practice of the application. Other advantages of the present application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings are included to provide an understanding of the technical aspects of the present application, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present application and together with the examples of the present application, and not constitute a limitation of the technical aspects of the present application.
Fig. 1 is a schematic structural diagram of a self-cleaning wall-breaking food processor provided by an embodiment of the invention;
FIG. 2 is a flow chart of a method for detecting water shortage in a food processor according to an exemplary embodiment of the present invention;
FIG. 3 is a flow chart of a method for detecting water shortage in a food processor according to an exemplary embodiment of the present invention;
fig. 4 is a flowchart of a water shortage detection method of a food processor according to an exemplary embodiment of the present invention.
Detailed Description
The present application describes a number of embodiments, but the description is illustrative and not 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 in place of any other feature or element of any other embodiment unless specifically limited.
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 of the present disclosure may also be combined with any conventional features or elements to form a unique inventive arrangement as defined in the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive arrangements to form another unique inventive arrangement as defined in 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 to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.
Furthermore, 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 sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Accordingly, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, 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 water shortage detection scheme of a food processor, which is used for carrying out secondary judgment or tertiary judgment according to different modes when water level detection by utilizing a metal electrode is used for judging that water exists, so that the reliability of anhydrous detection is improved.
The embodiment of the invention provides a food processor, which can comprise a base and a processing assembly arranged on the base, wherein the processing assembly can comprise a cup body, a crushing device and a cup cover, the cup body and the cup cover are matched to form a processing cavity, and the base is also provided with a water tank, a water pump and a steam generator. The steam generator can comprise a heating pipe, wherein the heating pipe is attached to the boiler and used for heating steam of the boiler. The water pump may be a diaphragm pump.
The food processor provided in this embodiment may include, but is not limited to, a self-cleaning wall-breaking food processor, a juice extractor, and a dough maker. The following embodiments of the present invention mainly take the water shortage detection of the self-cleaning wall-breaking food processor as an example for explanation, and the implementation principle of the water shortage detection of the rest food processors including the juicer, the wheaten food machine, etc. is the same as the implementation principle of the water shortage detection of the self-cleaning wall-breaking food processor, and the embodiments are not repeated one by one.
Fig. 1 is a schematic structural diagram of a self-cleaning wall-breaking food processor provided by the embodiment of the invention, as shown in fig. 1, the self-cleaning wall-breaking food processor provided by the embodiment of the invention can comprise a base and a processing assembly arranged on the base, wherein the processing assembly comprises a cup body 2, a crushing device and a cup cover, the cup body 2 and the cup cover are matched to form a processing cavity, and a water tank 1, a water pump 5 and a steam generator 3 are further arranged on the base.
As shown in fig. 1, a water level detection module 4 for detecting whether water exists in the water tank 1 is arranged on a pipeline of a water outlet of the water tank, and the water level detection module can comprise two electrodes. Wherein the electrode may be a metal electrode.
In an example, as shown in fig. 1, the self-cleaning wall-breaking food processor provided by the embodiment of the invention may further include a pulp cup 6, a rotary valve 7 and an air inlet 8. In fig. 1, T3 represents the temperature in the cup body, and T represents the outlet water temperature at which hot water or steam is output.
Optionally, the food processor may further include a main control chip, where the main control chip is configured to execute the water shortage detection method of the food processor shown in the following embodiments. The main control chip may be a single chip microcomputer (MCU for short). In this embodiment, main control chip communicates with water level detection module and water pump respectively, and specifically, water level detection module can communicate with MCU's signal acquisition pin, and the water pump can communicate with MCU's control pin.
Further, based on the food processor provided by the embodiment, the embodiment of the invention also provides a water shortage detection method of the food processor. Fig. 2 is a flowchart of a water shortage detection method of a food processor according to an exemplary embodiment of the present invention, and as shown in fig. 2, the execution main body of the water shortage detection method of the food processor according to the embodiment of the present invention may be a main control chip, and the specific steps may include:
s201: the resistance value between the two electrodes is detected and compared with a resistance threshold.
In this embodiment, whether water exists in the water tank can be detected through two electrodes on a pipeline of the water outlet of the water tank, and the resistance value of the water in the water tank is detected through the two electrodes so as to determine whether water exists in the water tank. The implementation principle of detecting whether water exists in the water tank by using the electrodes (such as two metal electrodes) is the same as that of the prior art, and the embodiment is not limited and described herein.
S202: and determining the current operation function of the food processor when the resistance value is less than or equal to the resistance threshold value.
The operation functions may include a hot state function in which the steam generator is heating and a cold state function in which the steam generator is not heating, or the operation functions may include full-speed operation of the water pump or non-full-speed operation of the water pump.
In some practical technologies, when the resistance value of the water in the water tank detected by the two electrodes is smaller than or equal to the resistance threshold value, the water in the water tank is directly determined. The resistance values of various kinds of water are different, especially mineral water and distilled water, the mineral water has a large mineral content, the resistance value of water is small, but the distilled water has a large resistance because the mineral content is basically absent in the water. After a user uses mineral water for a long time, the resistance value of the electrode when no water exists is close to the resistance value of the electrode when distilled water exists due to the pollution of the pipeline, if whether water exists is judged by only the resistance value of the electrode, the phenomenon of misjudgment that the water exists when no water exists is judged, and the detection reliability is low.
In this embodiment, when the resistance value is less than or equal to the resistance threshold, the secondary determination needs to be performed in different modes to improve the reliability of anhydrous detection.
S203: determining a judging parameter according to the current running function, and secondarily judging whether the water tank is water or not according to the judging parameter.
In this embodiment, the reliability of the anhydrous detection is ensured by performing the secondary detection of the cold state function and the hot state function, or by performing the secondary detection of the full-speed operation of the water pump and the non-full-speed operation of the water pump. When in secondary judgment, the judgment parameters of the secondary judgment can be determined according to whether the current running function of the food processor is a hot state function or a cold state function or whether the current running function is full-speed operation or non-full-speed operation of the water pump, and whether water exists in the water tank or not is judged secondarily according to the determined judgment parameters, so that the reliability of anhydrous detection is improved.
In one example, where the current operating function includes a thermal state function in which the steam generator is heating, a secondary determination may be made by the steam generator as to whether the tank has water in the thermal state function.
In one example, when the current operating function includes a cold state function in which the steam generator is not heated, a secondary determination may be made as to whether there is water in the cold state function tank by a water pumping module (e.g., a water pump).
In one example, when the current operating function is full speed operation of the water pump, a secondary determination may be made by a pumping module (e.g., a water pump) as to whether the water tank is full speed operation of the water pump.
In one example, when the current running function is that the water pump is not in full-speed operation, whether the water tank is in water or not under the condition of non-full-speed operation of the water pump can be secondarily judged through the change of the resistance value between the two electrodes.
According to the water shortage detection method for the food processor, when the electrodes are adopted to judge that water exists in the water tank, secondary judgment is carried out according to different modes, the phenomenon that no water is judged to be water through the resistance value collected by the electrodes is avoided, so that the reliability of water shortage detection is improved, an effective isolation structure is not required to be designed to ensure the reliability of electrode detection, the cost is low, and the installation is simple.
In an example embodiment of the invention, when the current operating function is a thermal state function, the determination parameter is the temperature of the steam generator.
In this embodiment, when the electrode determines that water exists in the water tank, the temperature of the steam generator is used to secondarily determine whether water exists in the water tank under the thermal state function, so as to improve the reliability of anhydrous detection.
In an example, the secondary determination of whether the water tank is water or not according to the determination parameter may include:
detecting the temperature of the steam generator, and comparing the temperature of the steam generator with a temperature threshold; and when the temperature of the steam generator is greater than the temperature threshold value, judging that no water exists in the water tank.
In practical application, when the thermal state functional steam generator works, if no water exists in the water tank, the temperature of the steam generator can rise rapidly, and whether water exists in the water tank can be effectively identified by detecting the temperature of the steam generator.
In the embodiment, when a user uses a thermal state function, the main control chip controls the steam generator and the water pump to work normally, and detects the temperature T of the steam generator, and if the temperature T of the steam generator is greater than a temperature threshold B, the water in the water tank is judged to be anhydrous, so that the user is reminded of adding water; if the temperature T of the steam generator is less than or equal to the temperature threshold B, judging that water exists in the water tank, and continuing to work.
The temperature threshold may be determined according to an empirical value or an analog value, which is not limited and described herein.
In this embodiment, the electrode is combined with the thermal state function to detect whether water exists in the water tank, so that the misjudgment phenomenon that the water exists in the water tank is determined only by the resistance value collected by the electrode can be avoided, the problem that certain hysteresis exists only by the temperature detection of the steam generator is avoided, and the reliability of the water-free detection is improved.
In an example, after secondarily determining that there is no water in the water tank by the temperature of the steam generator, it may further include:
and controlling the steam generator to stop heating, and controlling the water pump to empty at full speed, wherein the water pump is used for radiating heat so as to reduce the temperature of the steam generator.
In this embodiment, during the thermal state function, the pumping speed of the water pump and the power of the steam generator can be determined according to the temperature T of the steam generator.
When the temperature T of the steam generator is less than the temperature threshold B, the water pump works at a low speed, so that the steam is reliably generated. The power of the steam generator can be adjusted according to the temperature of the steam outlet, so that the stability of the steam temperature is ensured.
When the temperature T of the steam generator is more than or equal to the temperature threshold B, the water pump works at full speed, and the steam generator stops heating. In this embodiment, when the temperature of the steam generator exceeds the temperature threshold B, the heating is stopped immediately, and the heat is dissipated by the full-speed air pumping of the water pump, so that the temperature of the steam generator is prevented from continuously rising, and the protection temperature controller is prevented from being tripped.
When the user selects the thermal state function, in order to ensure that the pipeline normally generates steam, the water pump can not work at full speed, so that whether water exists in the water tank can not be judged by detecting the current of the water pump.
According to the water shortage detection method of the food processor, when the electrode detection fails and the water tank is judged to be water, the temperature can be rapidly increased due to the normal operation of the steam generator, and the temperature exceeds the limit temperature of the normal operation of the steam generator when the water is present. According to the embodiment, the temperature of the steam generator is detected to carry out secondary judgment, so that whether water exists in the water tank can be effectively identified, and the reliability of water-free detection is improved.
In an exemplary embodiment of the present invention, when the current operation function is that the water pump is not operating at full speed, the determination parameter is a trend of change in the resistance value.
In this embodiment, when the electrodes determine that water exists in the water tank, the resistance value between the two electrodes changes to secondarily determine whether water exists in the water tank under non-full-speed operation of the water pump, so as to improve the reliability of anhydrous detection.
In this embodiment, the secondary determination of whether the water tank is water or not according to the determination parameter may include:
detecting a resistance value between two electrodes within a preset time period; and when the resistance value continuously rises within a preset time period, judging that no water exists in the water tank.
In practical applications, when the electrodes are stuck or the user uses water with a high total dissolved solids (Total dissolved solids, TDS for short), although the resistance value between the two electrodes is lower than the resistance threshold when no water exists, the resistance value between the two electrodes is obviously increased compared with the state when water exists, and the embodiment can effectively identify whether water exists in the water tank through the change of the resistance value between the two electrodes.
In this embodiment, when the water pump is not in full-speed operation, the resistance value between the two electrodes is detected in the operation process of the water pump, and the resistance value between the two electrodes continuously rises in a preset time period, so that no water in the water tank can be secondarily determined.
According to the water shortage detection method of the food processor, when the electrodes are adhered or water with a high TDS value is used by a user, so that the electrode detection is invalid, and the water tank is judged to be water, the resistance value between the two electrodes is obviously increased when the water tank is not water compared with the water state. According to the embodiment, the secondary judgment is performed by detecting the rising trend of the resistance value between the two electrodes, so that whether water exists in the water tank can be effectively identified, and the reliability of water-free detection is improved.
In an exemplary embodiment of the present invention, after secondarily determining that there is no water in the water tank by the rising trend of the temperature of the steam generator or the resistance value between the two electrodes, it may further include:
controlling the water pump to work at full speed, detecting the water pumping current value when the water pump works at full speed, and judging whether the water tank is water or not for three times according to the water pumping current value; and when the pumping current value is smaller than the current threshold value, judging that no water exists in the water tank.
In this embodiment, whether water exists or not is first determined by the resistance value of the electrode, and when water exists or not is first determined, a secondary determination of whether water exists or not is performed by the resistance value change of the electrode or the temperature of the steam generator, and when water does not exist, a tertiary determination of whether water exists or not is performed by the current value of the water pump, so that the reliability and the accuracy of the water existence determination are ensured, and the reliability of water existence detection is improved.
In an example, during the working process of the food processor, if the water pump is in a non-full-speed working state, in a preset time period during the working process of the water pump, the resistance value of the detection electrode rises to change so as to carry out secondary judgment, if the secondary judgment is no water, the water pump is forced to work at full speed, the water pump current value is detected to judge whether water exists or not for three times, when the water pump current value is smaller than the current threshold value, no water can be judged, and an alarm prompts a user to add water, otherwise, the food processor continues to work normally. Wherein the preset time period may be set to 2s.
In one example, during the operation of the food processor, if the water pump is in a thermal state in which the steam generator is heating, during the heating of the steam generator, the temperature of the steam generator is detected to perform a secondary determination, if the secondary determination is no water, the water pump is forced to operate at full speed, the water pump current value is detected to determine whether water exists three times, when the water pump current value is smaller than the current threshold value, no water can be determined, an alarm prompts a user to add water, otherwise, the food processor continues to operate normally.
According to the water shortage detection method of the food processor, provided by the embodiment of the invention, whether the water tank is water or not is judged for three times, so that all working scenes in the working process of the steam heating food processor can be covered, the reliability of water level detection is ensured, the cost is low, the installation is simple, and the reliability and compatibility of the existing water shortage detection are improved.
In an exemplary embodiment of the present invention, when the current operation function is a cold state function or the water pump is operated at full speed, the determination parameter is a water pumping current value of the water pump.
In this embodiment, when the electrode determines that water exists in the water tank, the water pump current is used to secondarily determine whether water exists in the water tank under the cold state function, so as to improve the reliability of anhydrous detection.
In this embodiment, the secondary determination of whether the water tank is water or not according to the determination parameter may include:
detecting a pumping current value of the water pump, and comparing the pumping current value with a current threshold value; and when the pumping current value is smaller than the current threshold value, judging that no water exists in the water tank.
In the embodiment, when the cold functional steam generator does not work, the water pump pumps water at full speed, and if water exists in the water tank, the water pump pumps water with high current; if no water exists in the water tank, the pumping current of the water pump is small.
In an example, the method for detecting water shortage of a food processor provided by the embodiment of the invention may further include: when the pumping current value is greater than or equal to the current threshold value, judging that water exists in the water tank.
In this embodiment, the pumping current (which may be referred to as the pumping current) during the operation of the water pump is detected under the cold state function to determine whether there is water in the water tank, and if the pumping current I of the water pump is greater than or equal to the current threshold C, it is determined that there is water in the water tank, and the operation is continued. If the pumping current I of the water pump is less than the current threshold C, the water in the water tank is judged to be anhydrous, and a user is reminded of adding water.
In this embodiment, the electrode is combined with the cold state function to detect whether water exists in the water tank, so that the misjudgment phenomenon that the water is judged to be water only through the resistance value collected by the electrode can be avoided, the problem that certain hysteresis exists only through the water pump current detection is avoided, and the reliability of the water-free detection is improved.
In an example, the method for detecting water shortage of a food processor provided by the embodiment of the invention may further include:
when the food processor enters a first preset mode, detecting a first current value when the water pump pumps at full speed and a second current value when the water pump pumps at full speed; a current threshold is determined from the first current value and the second current value.
The first preset mode may be a factory mode or a pipeline cleaning mode.
In this embodiment, during the cold state function, the water pump pumps water at full speed, and the current threshold C may be set according to the first current value I when the main control chip detects that the water pump pumps water at full speed and is empty during production of the food processor 1 And the second current value I when the water pump pumps water at full speed 2 The determination method specifically comprises the following steps:
the food processor is subjected to pumping verification when leaving the factory, wherein distilled water can be used for full-speed pumping test; the main control chip is provided with a storage module, and when the food processor pumps water and checks, the main control chip detects a first current value I when water exists 1 Second current value I when no water exists 2 Storing the data into a storage module; using the formula c= (I 1 +I 2 ) And/2 determining a current threshold C.
According to the water shortage detection method for the food processor, provided by the embodiment of the invention, when a user selects a cold state function, the water pump can work at full speed, when the electrode detection fails and the water tank is judged to be water, the existence of water in the water tank can be effectively identified by detecting the current value of the water pump, and the reliability of water-free detection is improved. In addition, when leaving the factory, each water pump can be pumped and checked, and the current threshold corresponding to different water pumps is determined, so that the detection reliability is ensured.
In an exemplary embodiment of the present invention, the method for detecting water shortage of a food processor provided in the embodiment of the present invention may further include:
when the food processor enters a second preset mode, determining a first resistance value when the electrode detects distilled water and determining a second resistance value when the electrode detects no water; a resistance threshold is determined from the first resistance value and the second resistance value.
The second preset mode may be a factory mode or a pipeline cleaning mode.
In this embodiment, the resistance threshold A may be based on a first resistance R when distilled water is detected by the electrodes during production by the food processor 1 Second resistance value R when electrode is free of water 2 The determination method specifically comprises the following steps:
the food processor is subjected to pumping verification when leaving the factory, wherein distilled water can be used for full-speed pumping test; the main control chip is provided with a storage module, and when the food processor pumps water and checks, the electrode detects a first resistance value R of distilled water 1 Second resistance value R when electrode is free of water 2 Storing the data into a storage module; using the formula a= (R 1 +R 2 ) And/2 determining a current threshold A.
According to the water shortage detection method for the food processor, provided by the embodiment of the invention, distilled water is used for checking the electrode when leaving a factory, so that the resistance threshold value for judging whether the electrode is water or not is ensured, and the water species with the least impurities can be effectively distinguished: the distilled water is in a state of water and no water, so that the reliability of the electrode anhydrous detection is ensured. In addition, each food processor is independently pumped and checked, and the resistance threshold value corresponding to different food processors is determined, so that accessory errors can be avoided, and the detection reliability is ensured.
In addition, the resistance threshold A is checked and set by using distilled water, and the resistance values of other water are smaller than those of distilled water, so that the water tank is surely in a water-free state when the resistance value of the water detected by the electrode is larger than or equal to the resistance threshold A.
Fig. 3 is a flowchart of a water shortage detection method of a food processor according to an exemplary embodiment of the present invention, as shown in fig. 3, may specifically include:
s301: the water level detection module detects a resistance value R of water.
In this embodiment, the water level detection module may include two metal electrodes.
S302: and judging whether the resistance value R of water is greater than the resistance threshold value A. If yes, executing S303; otherwise, S305 is performed.
S303: and judging that the water tank is anhydrous.
S304: reminding a user to add water.
S305: judging whether the running function is a thermal state function. If yes, executing S306; otherwise, S308 is performed.
S306: the steam generator temperature T is detected.
S307: it is determined whether the steam generator temperature T > temperature threshold B. If yes, executing S303; otherwise, the method exits.
S308: and detecting the pumping current value I of the water pump.
S309: judging whether the water pumping current value I is smaller than the water pump threshold value C. If yes, executing S303; otherwise, the method exits.
According to the water shortage detection method of the food processor, provided by the embodiment of the invention, the electrode is used for carrying out primary judgment of water shortage detection, and when the electrode judges that water exists, the steam generator temperature is used for carrying out secondary judgment on a thermal state function; or the cold state function is secondarily judged through the water pump current, so that the anhydrous detection reliability can be improved, the cost is low, and the installation is simple.
Fig. 4 is a flowchart of a water shortage detection method of a food processor according to an exemplary embodiment of the present invention, as shown in fig. 4, which may specifically include:
s401: and judging whether the electrode water level AD value is greater than the resistance threshold A. If yes, executing S402; otherwise, S403 is executed.
The electrode water level AD value is the resistance value R of water.
S402: water level Flag flag_sw_state=0; the AD value up flag flag_ad=0 is cleared, and 413 is executed.
The water level Flag flag_sw_state=0 indicates no water, and the water level Flag flag_sw_state=1 indicates water.
S403: the water level Flag flag_sw_state=1.
S404: judging whether the temperature of the steam generator is greater than a temperature threshold value or not in the working process of the water pump or the steam generator. If yes, executing S405; otherwise, S406 is performed.
S405: the water pump is forced to pump water at full speed, and the heating power of the steam generator is reduced to the lowest gear.
S406: judging whether the water pump pumps water at full speed. If yes, executing S407; otherwise, S411 is performed.
S407: and judging whether the pumping current value of the continuous time T2 water pump is smaller than a current threshold value. If yes, executing S408; otherwise, S409 is performed.
S408: the water level Flag flag_sw_state=0, the water-free alarm, S401 is executed.
S409: judging whether an AD value rising flag flag_ad=1, if so, executing S410; otherwise, ending.
Here, the AD value rising flag flag_ad=1 indicates that there is water, and the AD value rising flag flag_ad=0 indicates that there is no water.
S410: clear AD value rising flag flag_ad=0, pump normally pumps water.
S411: and judging whether the AD value detected by the continuous time T1 rises or not in the working process of the water pump. If yes, executing S412; otherwise, ending.
S412: and setting an AD value rising flag flag_AD=1, forcing the water pump to pump water at full speed, and executing S401.
S413: and (5) alarming without water, and intermittently pumping water by a water pump.
In this embodiment, when it is determined that the water tank is not water, a water-free alarm may be performed to remind the user to add water. When no water is used for alarming, the water pump can work in a gap.
In one example, the water pump may be operated at full speed for 1 second to 2 seconds and stopped for 20 seconds to 30 seconds upon a no water alarm.
According to the water shortage detection method of the food processor, provided by the embodiment of the invention, the electrode is used for carrying out primary judgment of water shortage detection, when the electrode judges that water exists, the AD value change or the temperature of the steam generator is used for carrying out secondary judgment of whether water exists or not, and when the secondary judgment is carried out, the current value of the water pump is used for carrying out tertiary judgment of whether water exists or not, so that the reliability and the accuracy of the water existence judgment are ensured, the cost is low, the installation is simple, and the reliability and the compatibility of the existing water existence detection are improved.
The water shortage detection method of the food processor and the food processor provided by the embodiment of the invention can effectively solve the problems of high hardware cost and complex design of the anhydrous detection module of the existing steam heating food processor; solves the problems of complex assembly and low production efficiency of the anhydrous detection module of the existing steam heating food processor; the problem that the existing anhydrous detection module of the steam heating food processor is low in reliability and easy to fail in detection is solved; solves the problem that the slurry overflows when the water pump continuously works when the existing steam heating food processor is anhydrous.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the 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 cooperatively by several physical components. 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 both 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 known to those skilled 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 be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, 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.
Claims (7)
1. The utility model provides a lack of water detection method of food processor, food processor includes the base and locates the processing subassembly on the base, the processing subassembly includes cup, reducing mechanism and bowl cover, the cup with the bowl cover cooperation forms the processing chamber, still be equipped with water tank, water pump and steam generator on the base, be equipped with two electrodes on the pipeline of water tank delivery port, characterized in that, the method includes:
detecting a resistance value between two electrodes, and comparing the resistance value with a resistance threshold value;
determining a current operating function of the food processor when the resistance value is less than or equal to the resistance threshold, the operating function including a hot state function in which the steam generator is heating and a cold state function in which the steam generator is not heating, or the operating function including full speed operation of the water pump or non-full speed operation of the water pump;
determining a judging parameter according to the current operation function, wherein the judging parameter is the temperature of the steam generator when the current operation function is a thermal state function; or when the current running function is that the water pump does not work at full speed, the judging parameter is the change trend of the resistance value; or when the current running function is a cold state function or the water pump works at full speed, the judging parameter is the water pumping current value of the water pump;
and carrying out secondary judgment on whether the water tank is water or not according to the judgment parameters.
2. The method of claim 1, wherein said secondarily determining whether said water tank is water or not based on said determination parameter comprises:
detecting the temperature of the steam generator, and comparing the temperature of the steam generator with a temperature threshold;
and when the temperature of the steam generator is greater than the temperature threshold value, judging that no water exists in the water tank.
3. The method of claim 1, wherein said secondarily determining whether said water tank is water or not based on said determination parameter comprises:
detecting a resistance value between two electrodes within a preset time period;
and when the resistance value continuously rises in the preset time period, judging that no water exists in the water tank.
4. A method according to claim 2 or 3, wherein after a secondary determination that there is no water in the tank, the method further comprises:
controlling the water pump to work at full speed, detecting the water pumping current value when the water pump works at full speed, and judging whether the water tank is water or not for three times according to the water pumping current value;
and when the water pumping current value is smaller than the current threshold value, judging that no water exists in the water tank.
5. The method of claim 1, wherein said secondarily determining whether said water tank is water or not based on said determination parameter comprises:
detecting a pumping current value of the water pump, and comparing the pumping current value with a current threshold value;
and when the pumping current value is smaller than the current threshold value, judging that no water exists in the water tank.
6. The method of claim 5, wherein the method further comprises:
when the food processor enters a first preset mode, detecting a first current value when the water pump pumps at full speed and empty, and detecting a second current value when the water pump pumps at full speed;
determining the current threshold value according to the first current value and the second current value;
when the food processor enters a second preset mode, determining a first resistance value when the electrode detects distilled water and determining a second resistance value when the electrode detects no water;
and determining the resistance threshold according to the first resistance value and the second resistance value.
7. The food processor is characterized by comprising a base and a processing assembly arranged on the base, wherein the processing assembly comprises a cup body, a crushing device and a cup cover, the cup body and the cup cover are matched to form a processing cavity, a water tank, a water pump and a steam generator are further arranged on the base, and two electrodes are arranged on a pipeline of a water outlet of the water tank;
the food processor further comprises a main control chip for executing the water shortage detection method of the food processor according to any one of claims 1 to 6.
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