CN112082145A - Water shortage detection method and water shortage detection circuit of evaporator - Google Patents
Water shortage detection method and water shortage detection circuit of evaporator Download PDFInfo
- Publication number
- CN112082145A CN112082145A CN202010774682.7A CN202010774682A CN112082145A CN 112082145 A CN112082145 A CN 112082145A CN 202010774682 A CN202010774682 A CN 202010774682A CN 112082145 A CN112082145 A CN 112082145A
- Authority
- CN
- China
- Prior art keywords
- evaporator
- water
- resistor
- transistor
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 238000001514 detection method Methods 0.000 title claims abstract description 87
- 238000009835 boiling Methods 0.000 claims abstract description 18
- 101150037899 REL1 gene Proteins 0.000 claims description 17
- 101100099158 Xenopus laevis rela gene Proteins 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000007547 defect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 238000010411 cooking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/26—Automatic feed-control systems
- F22D5/34—Applications of valves
-
- 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
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
-
- 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
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/26—Automatic feed-control systems
- F22D5/36—Automatic feed-control systems for feeding a number of steam boilers designed for different ranges of temperature and pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a water shortage detection method and a water shortage detection circuit of an evaporator, wherein the water shortage detection method comprises the following steps: s1: controlling the evaporator to start working; s2: acquiring and judging whether the real-time temperature of the evaporator is greater than or equal to a set temperature or not, and if so, entering the next step; s3: acquiring a vibration change value of the evaporator within a set time t 1; s4: and judging whether the obtained vibration change value is smaller than a target value, if not, judging that the evaporator has water and returning to the step S2, and if so, judging that the evaporator is in small water boiling or water shortage. The water shortage detection method judges whether the real-time temperature of the evaporator is greater than or equal to the set temperature or not, and judges whether the evaporator is in small water volume boiling or water shortage or not according to the size relation between the vibration change value generated by the evaporator within the set time and the target value when the real-time temperature is greater than or equal to the set temperature, so that the detection accuracy is higher, and the occurrence of misjudgment is effectively avoided.
Description
Technical Field
The invention relates to the technical field of cooking equipment, in particular to a water shortage detection technology for an evaporator of the cooking equipment.
Background
At present, when an evaporator of a product such as a steam box, a steam oven and the like has no water, a control system needs to be informed of water shortage in time so as to prevent the evaporator from being over-heated due to long-term dry burning. It is common practice to use a probe or level sensor assembly to detect the water level. The probe can be attached with scale after being used for a long time, so that the detection accuracy is influenced; the sensor assembly, although accurate in detection, is relatively costly and is significantly affected by water quality.
Disclosure of Invention
The invention aims to solve at least one of the problems in the prior related art to a certain extent, and therefore the invention provides a method for detecting water shortage of an evaporator, which judges whether the evaporator is in small water quantity boiling or water shortage or not according to a vibration change value generated by the evaporator within a set time t1 when the real-time temperature of the evaporator is greater than or equal to a set temperature, has higher detection accuracy and avoids misjudgment.
The invention also provides a water shortage detection circuit of the evaporator, which realizes accurate detection of whether the evaporator is in water shortage or not, can avoid misjudgment and effectively overcomes the defects of the existing water shortage detection.
According to the above-mentioned water shortage detection method of an evaporator that provides, it realizes through following technical scheme:
the water shortage detection method of the evaporator is characterized in that the evaporator is provided with a vibration detection unit and a temperature detection unit, the evaporator is communicated with a water pump, the vibration detection unit, the temperature detection unit and the water pump are respectively and electrically connected with a controller, and the water shortage detection method comprises the following steps:
s1: controlling the evaporator to start working;
s2: acquiring and judging whether the real-time temperature of the evaporator is greater than or equal to a set temperature or not, and if so, entering the next step;
s3: acquiring a vibration change value of the evaporator within a set time t 1;
s4: and judging whether the obtained vibration change value is smaller than a target value, if not, judging that the evaporator has water and returning to the step S2, and if so, judging that the evaporator is in small water boiling or water shortage.
In some embodiments, in step S1, the controlling the evaporator to start operating includes:
s11: starting a water pump to inject water into the evaporator, and starting timing;
s12: continuously judging whether the working time of the water pump reaches the preset pump closing time or not, if so, closing the water pump and entering the next step;
s13: and controlling the evaporator to start working.
In some embodiments, further comprising the step of:
s5: controlling the evaporator to stop working or reducing the working power of the evaporator;
s6: and starting a water pump to replenish water to the evaporator.
According to the above-mentioned lack of water detection circuit who provides an evaporimeter, it realizes through following technical scheme:
the utility model provides a lack of water detection circuitry of evaporimeter, includes evaporimeter drive unit and controller, wherein still includes vibration detecting element and temperature detecting element, vibration detecting element is used for monitoring the vibration change value that the evaporimeter produced in set time t1, temperature detecting element is used for monitoring the real-time temperature of evaporimeter, the controller is connected respectively evaporimeter drive unit vibration detecting element with temperature detecting element.
In some embodiments, the vibration detection unit includes a piezoceramic sheet Y1, a transistor Q4 and a diode D3, two ends of the piezoceramic sheet Y1 are respectively connected to a base and an emitter of the transistor Q4, collectors of the transistor Q4 are respectively connected to the controller and the supply voltage, and the diode D3 is connected in parallel with the piezoceramic sheet Y1.
In some embodiments, the vibration detection unit further comprises a resistor R8, and the resistor R8 is connected in parallel with the piezoceramic sheet Y1.
In some embodiments, the vibration detection unit further includes a resistor R9, and the collector of the transistor Q4 is connected to a supply voltage through the resistor R9.
In some embodiments, the evaporator driving unit includes an evaporator CN2, a relay REL1, a diode D2, a transistor Q3 and a resistor R7, the evaporator CN2 is respectively connected to a zero line of alternating current and a normally open stationary contact of the relay REL1, a movable contact of the relay REL1 is connected to a live line of alternating current, the relay REL1 is respectively connected to a power supply 12V and a collector of the transistor Q3, the diode D2 is connected in parallel with the relay REL1, an emitter of the transistor Q3 is grounded, and a base is connected to the controller through the resistor R7.
In some embodiments, the temperature detection unit further comprises a thermistor RT and a resistor R6, one end of the thermistor RT is grounded, the other end of the thermistor RT is connected to the controller, and two ends of the resistor R6 are respectively connected to the thermistor RT and the power supply voltage.
In some embodiments, the temperature detection unit further comprises a capacitor C2, and the capacitor C2 is connected in parallel with the thermistor RT.
In some embodiments, the water pump driving unit further comprises a water pump CN1, a diode D1, a triode Q1, a resistor R1, a resistor R2, a triode Q2 and a resistor R3, wherein one end of the water pump CN1 is grounded, the other end of the water pump CN1 is connected to the collector of the triode Q1, the diode D1 is connected in parallel with the water pump CN1, the emitter of the triode Q1 is connected to the power supply 12V, the base of the triode Q1 is connected to the collector of the triode Q2 through the resistor R2, two ends of the resistor R1 are respectively connected to the base and the emitter of the triode Q1, the emitter of the triode Q2 is grounded, and the base of the resistor R3 is connected to the controller.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. according to the water shortage detection circuit, the temperature detection unit is matched with the vibration detection unit, so that whether the evaporator is in water shortage or not is accurately detected, and the defects of the existing water shortage detection are effectively overcome;
2. the water shortage detection method judges whether the real-time temperature of the evaporator is greater than or equal to the set temperature or not, and judges whether the evaporator is in small water volume boiling or water shortage or not according to the size relation between the vibration change value generated by the evaporator in the set time and the target value when the real-time temperature is greater than or equal to the set temperature, so that the detection accuracy is higher, and the occurrence of misjudgment is effectively avoided.
Drawings
FIG. 1 is a circuit diagram of a water shortage detecting circuit of an evaporator in embodiment 1 of the invention;
FIG. 2 is a block diagram showing the connection of an evaporator in embodiment 2 of the present invention;
FIG. 3 is a flowchart of a method for detecting water shortage in an evaporator in embodiment 2 of the present invention;
FIG. 4 is a sub-flowchart of step S1 in FIG. 3;
FIG. 5 is a flowchart of a method for detecting water shortage in an evaporator according to embodiment 3 of the present invention;
fig. 6 is a sub-flowchart of step S6 in fig. 5.
Detailed Description
The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the invention or equivalent substitutions of parts of technical features without departing from the spirit of the invention are intended to be covered by the scope of the claims of the invention.
Example 1
Referring to fig. 1, the present embodiment provides a water shortage detection circuit for an evaporator, which includes an evaporator driving unit 1, a controller 2, a vibration detection unit 3 and a temperature detection unit 5, wherein the evaporator driving unit 1 is respectively connected to an evaporator (not shown in the figure) and the controller 2, and is used for controlling the working state of an evaporator 10. The vibration detection unit 3 is disposed on the evaporator and connected to the controller 2, and is configured to monitor a vibration variation value generated by the evaporator within a set time t 1. The temperature detection unit 5 is disposed on the evaporator and connected to the controller 2 for monitoring the real-time temperature of the evaporator 10. One end of the controller 2 is connected with a power supply, the other end of the controller is grounded, and the controller 2 is respectively connected with the evaporator driving unit 1, the vibration detection unit 3 and the temperature detection unit 5, the controller 2 is used for judging whether the real-time temperature of the evaporator is greater than or equal to the set temperature, and is also used for judging whether the evaporator 10 is in small water volume boiling or water shortage according to the monitored vibration change value when the real-time temperature is greater than or equal to the set temperature.
In the present embodiment, when water in the evaporator 10 is boiled, vibration is generated. When the evaporator 10 operates with the same heating power, the more water inside the evaporator 10 boils, the more intense the vibration generated; conversely, when the water inside the evaporator 10 becomes less, the vibration generated by the boiling of the water becomes weaker. According to this principle, by providing the evaporator 10 with the vibration detection unit 3 connected to the controller 2, it is possible to detect whether the evaporator 10 is boiling or lack of water in a small amount of water according to the magnitude of the vibration of the evaporator 10.
Therefore, the water shortage detection circuit of the evaporator of the embodiment realizes accurate detection on whether the evaporator 10 is in water shortage or not through the cooperation of the temperature detection unit 5 and the vibration detection unit 3, can avoid misjudgment of the controller 2, and effectively overcomes the defect of existing water shortage detection.
Referring to fig. 1, specifically, the vibration detecting unit 3 includes a piezoelectric ceramic piece Y1, a transistor Q4, and a diode D3, wherein the piezoelectric ceramic piece Y1 is disposed on the evaporator and is used for detecting mechanical vibration of the evaporator and converting mechanical vibration energy into electrical energy. The two ends of the piezoelectric ceramic piece Y1 are respectively connected with the base electrode and the emitting electrode of the triode Q4, and the collector electrode of the triode Q4 is respectively connected with the controller 2 and the power supply voltage, so that when water in the evaporator boils and vibrates, the piezoelectric ceramic piece Y1 converts the vibration mechanical energy into electric energy, the conduction of the triode Q4 is automatically controlled, and the controller 2 detects a low level; on the other hand, when the controller 2 detects a high level, it indicates that the evaporator is not vibrating. The diode D3 is connected with the piezoelectric ceramic piece Y1 in parallel, so that the vibration mechanical energy is better converted into electric energy, a pulse loop is faster, and the electric signal detection efficiency is improved.
Preferably, the vibration detection unit 3 further includes a resistor R8, the resistor R8 is connected in parallel with the piezoelectric ceramic piece Y1, so that the pulse loop speed of the vibration detection unit 3 is reduced by connecting the resistor R8 in parallel with the two ends of the piezoelectric ceramic piece Y1, so as to avoid the influence on the detection accuracy due to the too fast pulse loop, thereby realizing the cooperation of the resistor R8 and the diode D3, adjusting the whole pulse loop of the vibration detection unit 3, and improving the detection accuracy and the service life while ensuring the detection efficiency.
More preferably, the vibration detection unit 3 further includes a resistor R9, and the collector of the transistor Q4 is connected to the power supply voltage through a resistor R9, so that the resistor R9 can perform a voltage division function to better satisfy the working voltage required by the operation of the electric ceramic plate Y1 and ensure the usability of the electric ceramic plate Y1.
Referring to fig. 1, specifically, the evaporator driving unit 1 includes an evaporator CN2, a relay REL1, a diode D2, a transistor Q3 and a resistor R7, the evaporator is connected to an evaporator CN2, the evaporator CN2 is respectively connected to a zero line of alternating current and a normally open stationary contact of the relay REL1, a movable contact of the relay REL1 is connected to a live line of alternating current, the relay REL1 is respectively connected to a power supply 12V and a collector of the transistor Q3, the diode D2 is connected in parallel to the relay REL1, an emitter of the transistor Q3 is grounded, and a base is connected to the controller 2 through the resistor R7. When the controller 2 outputs a high level, the triode Q3 is conducted, the relay REL1 is attracted, and the evaporator works; on the contrary, when the controller 2 outputs a low level, the triode Q3 is turned off, the REL1 is turned off, and the evaporator stops working. Thereby, it is convenient for the controller 2 to automatically control the operating state of the evaporator through the evaporator driving unit 1.
Referring to fig. 1, specifically, the temperature detecting unit 5 further includes a thermistor RT and a resistor R6, wherein the thermistor RT is disposed on the evaporator 10, one end of the thermistor RT is grounded, the other end of the thermistor RT is connected to the controller 2, and two ends of the resistor R6 are respectively connected to the thermistor RT and the power supply voltage. Therefore, the thermistor RT and the resistor R6 form a voltage division circuit, and the corresponding temperature value is sampled and calculated by the controller 2 according to the voltage division value, so that the real-time temperature of the evaporator 10 can be accurately detected.
Preferably, the temperature detection unit 5 further comprises a capacitor C2, and the capacitor C2 is connected in parallel with the thermistor RT, so that the capacitor C2 bypasses and decouples high-frequency noise generated by the device, cuts off a path through which the high-frequency noise propagates through the power supply loop, and prevents noise carried by the power supply voltage from interfering with the temperature detection unit 5.
Referring to fig. 1, further, the water pump driving unit 4 is further included, the water pump driving unit 4 includes a water pump CN1, a diode D1, a triode Q1, a resistor R1, a resistor R2, a triode Q2 and a resistor R3, the water pump is connected to the water pump CN1 and used for injecting water to the evaporator, one end of the water pump CN1 is grounded, the other end of the water pump CN1 is connected to a collector of the triode Q1, the diode D1 is connected in parallel to the water pump CN1, an emitter of the triode Q1 is connected to the power supply 12V, a base is connected to the collector of the triode Q2 through the resistor R2, two ends of the resistor R1 are respectively connected to a base and an emitter of the triode Q1, an emitter of the triode. When the controller 2 outputs a high level, the triode Q2 and the triode Q1 are conducted, and the water pump works; on the contrary, when the controller 2 outputs a low level, the triode Q2 is cut off, the triode Q1 is also cut off, and the water pump stops working. From this, be convenient for controller 2 through water pump drive unit 4, the operating condition of automatic control water pump, and then realize whether the automatic control water pump is to the evaporimeter water injection.
Example 2
Referring to fig. 2-3, the present embodiment provides a method for detecting water shortage of an evaporator, in which a vibration detection unit 3 and a temperature detection unit 5 are disposed on an evaporator 10, the vibration detection unit 3 is used for monitoring a vibration variation value generated by the evaporator 10 within a set time t1, and the temperature detection unit 5 is used for monitoring a real-time temperature of the evaporator 10. The evaporator 10 is communicated with a water pump 40 to realize water injection or water supplement to the evaporator 10 through the water pump 40. The vibration detection unit 3, the temperature detection unit 5 and the water pump 40 are electrically connected to the controller 2, respectively. The water shortage detection method comprises the following steps:
s1: controlling the evaporator 10 to start working;
specifically, the controller 2 controls the evaporator 10 to start operating to heat water in the evaporator 10 to boiling and produce steam. When water in the evaporator 10 boils, the evaporator 10 vibrates. And when the heating power of the evaporator 10 is kept constant, the more water in the evaporator 10 is, the more boiling is, and the stronger vibration is generated; conversely, when the water in the evaporator 10 becomes low, the vibration caused by the boiling of the water becomes weaker. Thus, the controller 2 can obtain the vibration generated when the evaporator 10 operates according to the vibration detection unit 3.
S2: acquiring and judging whether the real-time temperature of the evaporator 10 is greater than or equal to a set temperature or not, if so, entering the next step, otherwise, returning to the previous step;
specifically, the set temperature is 100-120 ℃. The temperature detection unit 5 monitors the real-time temperature of the evaporator 10 during working in real time, and sends the monitored real-time temperature to the controller 2, the controller 2 judges whether the monitored real-time temperature is greater than or equal to a set temperature, if the real-time temperature is greater than or equal to the set temperature, the water in the evaporator 10 is reduced, and the evaporator 10 can be preliminarily judged to be in small water volume boiling or water shortage; if the real-time temperature is less than the set temperature, it indicates that there is water inside the evaporator 10, and at this time, the vibration of the evaporator 10 is not detected, and the present step is continued until the evaporator 10 stops operating.
S3: acquiring a vibration change value of the evaporator 10 within a set time t 1;
specifically, the set time t1 is 5-20 seconds. The controller 2 is connected with a timer 5, and the timer 5 is used for recording the time when the water in the evaporator 10 boils to generate vibration. The vibration change value is a vibration level count value or a voltage change value of the vibration detection unit 3. The vibration variation value generated by the evaporator 10 within the set time t1 is monitored by the vibration detection unit 3, and the monitored vibration variation value is sent to the controller 2, so that the controller 2 sends a corresponding control command according to the vibration variation value generated within the set time t 1.
S4: and judging whether the obtained vibration change value is smaller than the target value, if not, judging that the evaporator 10 has water and returning to the step S2, and if so, judging that the evaporator 10 is in small water volume boiling or water shortage.
Specifically, the target value is a vibration level counting threshold or a voltage threshold corresponding to the situation that the evaporator 10 is boiled or lack of water in a small amount of water in the evaporator under the same heating power. In this embodiment, the target value is a vibration level count threshold, and the vibration level count threshold is 5 to 20 times.
The controller 2 indicates that water is in the evaporator 10 according to whether the vibration variation value generated by the evaporator 10 within the set time t1 is smaller than the target value, if the vibration variation value is greater than or equal to the target value, the evaporator 10 maintains the current working state to continuously generate steam, and returns to step S2 to continuously obtain and judge whether the evaporator 10 is in a small water boiling state or in a water shortage state until the evaporator 10 stops working. If the vibration variation value is less than the target value, it indicates that the water in the evaporator 10 is less, the vibration caused by the boiling of the water is weakened, and it is further judged that the evaporator 10 is boiling with a small amount of water or is short of water.
Therefore, according to the method for detecting water shortage of the evaporator, whether the real-time temperature of the evaporator is greater than or equal to the set temperature is judged, and when the real-time temperature is greater than or equal to the set temperature, the magnitude relation between the vibration change value generated by the evaporator 10 within the set time t1 and the target value is judged, whether the evaporator is in small water volume boiling or water shortage is judged based on the judgment result, so that the detection accuracy is higher, the occurrence of misjudgment is effectively avoided, and the defects of the existing water shortage detection are overcome.
Referring to fig. 4, preferably, in step S1, the control evaporator 10 starts to operate, including:
s11: starting the water pump 40 to inject water into the evaporator 10, and starting timing;
specifically, before the evaporator 10 starts to operate, the controller 2 controls the water pump 40 to start, so as to fill water into the evaporator 10 through the water pump 40, and at the same time, the timer 5 starts to record the operating time of the water pump 40.
S12: continuously judging whether the working time of the water pump 40 reaches the preset pump-off time, if so, turning off the water pump 40 and entering the next step;
specifically, the preset pump shutdown time is 5-15 seconds, the controller 2 judges whether the working time of the water pump 40 reaches the preset pump shutdown time, and if so, the water pump 40 is controlled to be shut down and the timing is cleared; if the preset pump-off time is not reached, the water pump 40 continues to supply water to the evaporator 10.
S13: the evaporator 10 is controlled to start operating.
From this, through controlling water pump 40 earlier to evaporimeter 10 water injection, control evaporimeter 10 work again, guarantee that evaporimeter 10 begins the during operation, its inside has more water yield, has reduced because of the probability that evaporimeter 10 lacks water for causing steam output to break off, promotes steam and lasts output effect, and the moisturizing number of times in the reducible evaporimeter 10 working process of while does benefit to the life who improves evaporimeter 10.
Example 3
Referring to fig. 5, the present embodiment is different from embodiment 2 in that the present embodiment further includes:
s5: controlling the evaporator 10 to stop working or reducing the working power of the evaporator 10;
specifically, after the evaporator 10 is judged to be boiled or lack of water with a small amount of water, the controller 2 controls the evaporator 10 to stop working or reduces the working power of the evaporator 10, so as to avoid dry burning and waste of electric energy of the evaporator 10, and prolong the service life of the evaporator 10.
S6: the water pump 40 is activated to replenish water to the evaporator 10.
Specifically, referring to fig. 6, the starting water pump 40 is used for replenishing water to the evaporator 10, and specifically includes:
s61: starting the water pump 40 to supplement water to the evaporator 10, and starting timing; s62: after the water pump 40 continues to operate for the preset time t2, the evaporator 10 is controlled to resume normal operation, and the process returns to step S2. Preferably, the preset time t2 is 5-15 seconds.
From this, it can be seen that, through when evaporimeter 10 worked to little water yield or lack of water, earlier control evaporimeter 10 stop work or reduce the operating power of evaporimeter 10, restart water pump 40 is to evaporimeter 10 moisturizing, control evaporimeter 10 after the moisturizing is accomplished and resume normal, like this, can avoid evaporimeter 10 dry combustion method and extravagant electric energy, do benefit to the life of extension evaporimeter 10 to the effect of power saving is better.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (11)
1. The water shortage detection method of the evaporator is characterized in that a vibration detection unit and a temperature detection unit are arranged on the evaporator, the evaporator is communicated with a water pump, the vibration detection unit, the temperature detection unit and the water pump are respectively and electrically connected with a controller, and the water shortage detection method comprises the following steps:
s1: controlling the evaporator to start working;
s2: acquiring and judging whether the real-time temperature of the evaporator is greater than or equal to a set temperature or not, and if so, entering the next step;
s3: acquiring a vibration change value of the evaporator within a set time t 1;
s4: and judging whether the obtained vibration change value is smaller than a target value, if not, judging that the evaporator has water and returning to the step S2, and if so, judging that the evaporator is in small water boiling or water shortage.
2. The method for detecting water shortage of an evaporator according to claim 1, wherein the controlling the evaporator to start operating in step S1 includes:
s11: starting a water pump to inject water into the evaporator, and starting timing;
s12: continuously judging whether the working time of the water pump reaches the preset pump closing time or not, if so, closing the water pump and entering the next step;
s13: and controlling the evaporator to start working.
3. The method for detecting water shortage of an evaporator according to claim 1 or 2, further comprising the steps of:
s5: controlling the evaporator to stop working or reducing the working power of the evaporator;
s6: and starting a water pump to replenish water to the evaporator.
4. The utility model provides a lack of water detection circuitry of evaporimeter, includes evaporimeter drive unit and controller, its characterized in that still includes vibration detecting element and temperature detecting element, vibration detecting element is used for monitoring the vibration change value that the evaporimeter produced in settlement time t1, temperature detecting element is used for monitoring the real-time temperature of evaporimeter, the controller is connected respectively evaporimeter drive unit vibration detecting element with temperature detecting element.
5. The water shortage detection circuit of the evaporator as recited in claim 4, wherein the vibration detection unit comprises a piezoelectric ceramic piece Y1, a transistor Q4 and a diode D3, two ends of the piezoelectric ceramic piece Y1 are respectively connected with a base electrode and an emitter electrode of the transistor Q4, a collector electrode of the transistor Q4 is respectively connected with the controller and a power supply voltage, and the diode D3 is connected in parallel with the piezoelectric ceramic piece Y1.
6. The water shortage detection circuit of the evaporator as recited in claim 5, wherein the vibration detection unit further comprises a resistor R8, and the resistor R8 is connected in parallel with the piezoelectric ceramic piece Y1.
7. The water shortage detecting circuit of evaporator as claimed in claim 5, wherein the vibration detecting unit further comprises a resistor R9, and the collector of the transistor Q4 is connected to the supply voltage through the resistor R9.
8. The water shortage detection circuit of evaporator as claimed in claim 4, wherein said evaporator driving unit comprises an evaporator CN2, a relay REL1, a diode D2, a transistor Q3 and a resistor R7, said evaporator CN2 is respectively connected to the zero line of alternating current and the normally open stationary contact of said relay REL1, the movable contact of said relay REL1 is connected to the live line of alternating current, said relay REL1 is respectively connected to the power supply 12V and the collector of said transistor Q3, said diode D2 is connected in parallel to said relay REL1, the emitter of said transistor Q3 is grounded, and the base is connected to said controller through said resistor R7.
9. The water shortage detection circuit of evaporator as recited in claim 4, wherein said temperature detection unit further comprises a thermistor RT and a resistor R6, one end of said thermistor RT is grounded, the other end is connected to the controller, and two ends of said resistor R6 are respectively connected to said thermistor RT and the power supply voltage.
10. The water shortage detecting circuit of evaporator as recited in claim 9, wherein said temperature detecting unit further comprises a capacitor C2, and said capacitor C2 is connected in parallel with said thermistor RT.
11. The water shortage detection circuit of an evaporator according to any one of claims 4-10, further comprising a water pump driving unit, wherein the water pump driving unit comprises a water pump CN1, a diode D1, a transistor Q1, a resistor R1, a resistor R2, a transistor Q2 and a resistor R3, one end of the water pump CN1 is grounded, the other end of the water pump CN1 is connected to the collector of the transistor Q1, the diode D1 is connected in parallel with the water pump CN1, the emitter of the transistor Q1 is connected to the power supply 12V, the base is connected to the collector of the transistor Q2 through the resistor R2, the two ends of the resistor R1 are respectively connected to the base and the emitter of the transistor Q1, the emitter of the transistor Q2 is grounded, and the base is connected to the controller through the resistor R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774682.7A CN112082145A (en) | 2020-08-04 | 2020-08-04 | Water shortage detection method and water shortage detection circuit of evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774682.7A CN112082145A (en) | 2020-08-04 | 2020-08-04 | Water shortage detection method and water shortage detection circuit of evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112082145A true CN112082145A (en) | 2020-12-15 |
Family
ID=73734821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010774682.7A Pending CN112082145A (en) | 2020-08-04 | 2020-08-04 | Water shortage detection method and water shortage detection circuit of evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112082145A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113741233A (en) * | 2021-07-21 | 2021-12-03 | 三门康创电子科技有限公司 | Control circuit of steaming and baking machine, steaming and baking machine and control method of steaming and baking machine |
| CN113854816A (en) * | 2021-09-22 | 2021-12-31 | 华帝股份有限公司 | Evaporator water level detection method and circuit and kitchen electrical equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883221A (en) * | 1981-10-29 | 1983-05-19 | エド・ウエスタン・コ−ポレイシヨン | Method and device for detecting liquid in vessel |
| JP2006029746A (en) * | 2004-07-21 | 2006-02-02 | Zojirushi Corp | Humidifier |
| CN106545836A (en) * | 2015-09-17 | 2017-03-29 | 哈尔滨市金京锅炉有限公司 | A kind of detection protection system of boiler |
| CN110702439A (en) * | 2019-09-28 | 2020-01-17 | 华帝股份有限公司 | Abnormity detection method of steam system |
-
2020
- 2020-08-04 CN CN202010774682.7A patent/CN112082145A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5883221A (en) * | 1981-10-29 | 1983-05-19 | エド・ウエスタン・コ−ポレイシヨン | Method and device for detecting liquid in vessel |
| JP2006029746A (en) * | 2004-07-21 | 2006-02-02 | Zojirushi Corp | Humidifier |
| CN106545836A (en) * | 2015-09-17 | 2017-03-29 | 哈尔滨市金京锅炉有限公司 | A kind of detection protection system of boiler |
| CN110702439A (en) * | 2019-09-28 | 2020-01-17 | 华帝股份有限公司 | Abnormity detection method of steam system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113741233A (en) * | 2021-07-21 | 2021-12-03 | 三门康创电子科技有限公司 | Control circuit of steaming and baking machine, steaming and baking machine and control method of steaming and baking machine |
| CN113854816A (en) * | 2021-09-22 | 2021-12-31 | 华帝股份有限公司 | Evaporator water level detection method and circuit and kitchen electrical equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112082145A (en) | Water shortage detection method and water shortage detection circuit of evaporator | |
| CN102914053A (en) | Dry heating prevention method of liquid heating device and heating device using dry heating prevention method | |
| WO2022028097A1 (en) | Baking smoking set having adjustable heating temperature | |
| KR20130017533A (en) | High frequency fatigue testing apparatus | |
| CN105453432A (en) | Solid state relay protective device | |
| CN105896471B (en) | Motor heat protection device and method for electric clothes dryer | |
| CN104935228A (en) | Hydropower intelligent control system and control method | |
| CN101441238B (en) | Apparatus and system for detecting starter durability | |
| CN112033497A (en) | Water shortage detection circuit and water shortage detection method of evaporator | |
| CN103437892B (en) | The starting method of motor and system | |
| CN108339723B (en) | Piezoelectric ceramic injection valve driving power supply for automatic dispenser | |
| CN207964112U (en) | A kind of device of automatic detection cigarette | |
| JP4049417B2 (en) | Method and apparatus for controlling cutting of an automobile starter | |
| CN116092876A (en) | Relay zero crossing control method and device and dish washer with same | |
| CN111012174A (en) | Water level detection and heating control system, water level detection and heating control method and electric kettle | |
| CN101463554A (en) | Control method for flat-iron and apparatus thereof | |
| CN1041893C (en) | Apparatus for and method of measuring consumption of electricity of revers phase cooker | |
| CN110384388B (en) | Cooking appliance control method and system and cooking appliance | |
| CN111956085B (en) | Water shortage detection method of cooking equipment | |
| CN201445487U (en) | Steam mop | |
| CN109173456B (en) | Air conditioner filter screen cleaning prompting method and device | |
| CN102510046B (en) | Over-current protector for motor | |
| WO2024066517A1 (en) | Control circuit, aerosol generating device, and control method of control circuit | |
| CN109406116A (en) | Scale detection method and liquid heating apparatus | |
| CN219105397U (en) | Temperature control circuit and electric water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |