CN203633984U - Electric heating pot with anti-spill structure - Google Patents
Electric heating pot with anti-spill structure Download PDFInfo
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- CN203633984U CN203633984U CN201320828080.0U CN201320828080U CN203633984U CN 203633984 U CN203633984 U CN 203633984U CN 201320828080 U CN201320828080 U CN 201320828080U CN 203633984 U CN203633984 U CN 203633984U
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Abstract
The utility model discloses an electric heating pot with an anti-spill structure and relates to an electric heating pot. The electric heating pot comprises a pot body and a wire base. A heating disc and a temperature sensor are arranged in the pot body, a power supply and a controller are arranged in the wire base, and the pot body and the wire base are electrically connected through a 5-core electric connector. An anti-spill detection unit comprising an upper probe and a lower probe is arranged on the pot body, the upper probe is arranged on the upper portion in a pot body accommodation cavity, and the lower probe is arranged on the lower portion in the pot body accommodation cavity or the heating disc. According to the 5-core electric connector, 3 cores are connected with an L electrode, an N electrode and an E earthing electrode of the power supply, the other 2 cores are connected with the temperature sensor, the upper probe and the lower probe, and the ends of the 2 cores on the wire base are connected with the controller. By means of the electric heating pot with the anti-spill structure, detection and control of the water temperature and spilling of the electric heating pot can be achieved simultaneously; the electric heating pot has the advantages of being practical, convenient to use, low in cost, reliable in control and the like; the market competitiveness of the electric heating pot is improved effectively.
Description
Technical field
The utility model relates to electrical heating pot, particularly the anti-spilling structure of electrical heating pot.
Background technology
More existing electrical heating pot, because its pot body needs frequent taking and placing, the modes that adopt pot bodies to separate with power conductor seat in structure more, the body of stewing is with the frequent separation of power conductor seat and be connected, and is equipped with lower connector, pot is provided with connector with it in power conductor seat.Realize electrical connection and control connection by upper and lower connector.The higher restriction of body inner space and the environment temperature of being stewed, electronic control part is difficult to be assemblied in pot body inside.So control circuit is arranged in power conductor seat.For this reason, this need to the water temperature information detecting with it of pot is delivered on the control circuit in power conductor seat time, must use at present 5 the most frequently used on the market core electric connectors to realize, 3 cores in this 5 core electric connectors are for connecting the L utmost point of line voltage, the N utmost point, three electrodes of E earthing pole, for pot body provides the line voltage L utmost point, the N utmost point, outside E earthing pole, be used for the stewing connection of temperature sensor (as NTC) in body of other 2 cores, water temperature for the body of stewing detects, after the water temperature information detecting must be connected with the lower connector in power conductor seat by upper connector, be sent to the control circuit in power conductor seat, to realize the control to water temperature.See ' pot body ' in Fig. 1--(in little dotted line frame), ' line seat '--(in large dotted line frame), pot body is often to be mentioned by user, separates with power conductor seat, for filling the action such as water or pouring, line seat is connected with power supply all the time.But there is following defect in the electrical heating of this structure pot: due to the reason of the aspect such as technology, space, at present electrical heating pot on the market electric connector maximum only have 5 core connectors, for this reason, adopt the circuit of above-mentioned 5 core electric connectors to process water temperature; Food in pot overflows, and owing to not overflowing accordingly detection, cannot be controlled, and brings inconvenience to consumer.
Summary of the invention
The purpose of this utility model is to provide a kind of water temperature that can detect and control in electrical heating pot can realize again detection to overflow and electrical heating pot that is provided with anti-spilling structure of spillage-proof function.
The purpose of this utility model can realize like this, design a kind of electrical heating pot that is provided with anti-spilling structure, comprise pot body and line seat, in pot body, be provided with heat-generating disc and temperature sensor, in line seat, be provided with power supply and controller, pot body and line seat are by 5 core electric connector electrical connections;
Pot arranges anti-overflow checkout gear with it, and anti-overflow checkout gear comprises probe and lower probe, and upper probe is arranged on pot body cavity volume internal upper part, and lower probe is arranged on the bottom or heat-generating disc in cavity volume; 5 core electric connectors, wherein 3 cores are connected with the power supply L utmost point, the N utmost point, E earthing pole, and other 2 cores are connected with temperature sensor and upper probe, lower probe, and one end of 2 online seats of core is connected to controller.
Further, described upper probe is apart from allowing maximum stage position more than 1 centimetre.
Further, temperature sensor one end is connected with resistance R 1, R2 and one end of capacitor C 1 by 5 core connectors, then be connected on the A/D port of controller by resistance R 2, the other end of temperature sensor is connected to one end of lower probe, and then being connected to dc source negative terminal and power supply E line end, lower probe is fixed on the lower surface of heat-generating disc; One end of upper probe is connected on the A/D1 port of controller by resistance R 4 behind the one end by 5 core connector contact resistance R4, R5, R6 and capacitor C 2.
Further, one end of temperature sensor is connected to behind the negative terminal of dc source and one end of capacitor C 1 by 5 core connectors, be connected to by capacitor C 1 and resistance R 2 on the A/D port of controller, this end is connected to after being also connected with lower probe on the power supply E line earthing pole terminal of 5 core connectors simultaneously, lower probe is connected with the lower surface of heat-generating disc, one end of upper probe is connected to by resistance R 2 on the A/D port of controller after being connected with one end of resistance R 1, R2, capacitor C 1 by 5 core connectors.
Further, one end of temperature sensor is connected with one end of upper probe by after 5 core connectors are connected with one end of resistance R 1, R2, capacitor C 1, be connected to by resistance R 2 on the A/D port of controller, upper probe is fixed on the upper position in pot body cavity volume, after the other end of temperature sensor is connected with lower probe, be connected to the other end of capacitor C 1 by 5 core connectors, lower probe is fixed on the lower position in pot body cavity volume.
The utility model can be realized electrical heating pot water temperature, the detection of overflowing and control simultaneously, has practicality, easy to use, cost is low, controls the advantages such as reliable, effectively promoted the market competitiveness of electrical heating pot.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of prior art;
Fig. 2 is the schematic block circuit diagram of one of the utility model preferred embodiment;
Fig. 3 is two schematic block circuit diagram of the utility model preferred embodiment;
Fig. 4 is three schematic block circuit diagram of the utility model preferred embodiment;
Fig. 5 is the structural representation of the utility model preferred embodiment.
The specific embodiment
Below in conjunction with embodiment, the utility model will be further described.
As shown in Fig. 2, Fig. 5, a kind of electrical heating pot that is provided with anti-spilling structure, comprises pot body 1 and line seat 8, in pot body 1, is provided with heat-generating disc 2 and temperature sensor 7, is provided with power supply and controller 10 in line seat 8, and pot body 1 and line seat 8 are electrically connected by 5 core electric connectors 6,
Pot arranges anti-overflow checkout gear on body 1, and anti-overflow checkout gear comprises probe 4 and lower probe 5, and upper probe 4 is arranged on pot body cavity volume internal upper part, and lower probe 5 is arranged on the lower surface of bottom in cavity volume or heat-generating disc 2; 5 core electric connectors 6, wherein 3 cores are connected with the power supply L utmost point, the N utmost point, E earthing pole, and other 2 cores are connected with temperature sensor 7 and upper probe 4, lower probe 5, and one end of 2 online seats 8 of core is connected to controller 10.
Described upper probe 4 is apart from allowing maximum stage position more than 1 centimetre.
On electrical heating pot, probe 4 and lower probe 5 are set, upper probe 4 is arranged on to electrical heating pot cavity volume internal upper part, apart from allowing maximum stage position more than 1 centimetre, when the water level of electrical heating pot is, while demarcating maximum, also can not touch probe 4, and lower probe 5 setting positions to have multiple, can be arranged on the bottom of the nearly heat-generating disc 2 in electrical heating pot cavity volume, also can directly be connected with heat-generating disc 2, or be exactly the upper and lower surface of heat-generating disc 2, lower probe 5 is the conductors that directly contact with water.Except the L utmost point, the N utmost point, E earthing pole take 3 cores of 5 core connectors 6,2 other cores on 5 core connectors 6 will become the splicing ear that detects water temperature and anti-spilled detection in pot body, can realize three kinds of different circuit by these 2 terminals and connect, realize water temperature and detect control and anti-spilled detection control.
Embodiment mono-, as shown in Fig. 2, Fig. 5.Circuit in power conductor seat 8 connects (in large dotted line frame): power line, power circuit, control circuit, the lower connector of 5 core connectors 6 is positioned in power conductor seat, after being connected with DC power cathode, power supply E line is connected on 1 core of E earthing pole of lower connector, by the L utmost point, the N utmost point is connected on 2 cores of respective terminal of the lower connector in power conductor seat, will with temperature sensor 7(NTC with it of pot) one end of the terminal that is connected of one end is connected on 1 core of lower connector of 5 core connectors 6, the other end and resistance R 1, R2 is connected with one end of capacitor C 1, then be connected to controller 10(MCU by resistance R 2) A/D port on, one end of the terminal that will be connected with the upper probe 4 on pot body 1 is connected on another 1 core of lower connector, other end contact resistance R4, R5, behind one end of R6 and capacitor C 2, be connected to controller 10(MCU by resistance R 4) A/D1 port on.Circuit on pot body 1 connects (in little dotted line frame): heat-generating disc 2, temperature sensor 7(NTC), upper probe 4, the upper connector of lower probe 5 and 5 core connectors 6 is positioned on pot body 1, the corresponding lower connector of upper connector that one end of heater element on heat-generating disc 23 is connected to 5 core connectors 6 connects on 1 core of the L utmost point, the other end of the heater element on heat-generating disc 3 is connected on 1 core of the corresponding lower connector N utmost point of the upper connector of 5 core connectors 6, by temperature sensor 7(NTC) one end be connected on the lower surface of heat-generating disc 2, and then be connected on another 1 core of power supply E line connection of the corresponding lower connector of connector, form the no-spill lower probe 5 of tracer liquid.By temperature sensor 7(NTC) the other end corresponding lower connector that is connected to upper connector be connected to behind R1, R2, C1 one end, be connected to controller 10(MCU by R2) 1 core of upper connector of A/D port on.The upper probe 4 that is positioned at pot body cavity volume internal upper part is wired to after corresponding lower connector is connected with one end of resistance R 4, R5, R6 and capacitor C 2 and is connected to controller 10(MCU by resistance R 4) A/D1 port on 1 core of upper connector on.
Because the upper connector of 5 core connectors 6 is fixed on pot body 1, on the fixing online seat 8 of lower connector, in the time that pot body 1 is placed in power conductor seat 8, each respective electrode is all that corresponding contact is connected, for this reason, just realized temperature sensor 7(NTC with it of pot) one end and heat-generating disc 2 lower surfaces descend probe 5 to be connected afterwards with the E line end on lower connector in power conductor seat 8 to be connected, and temperature sensor 7(NTC) the other end be connected to controller 10(MCU by 1 core of the lower connector in 1 core and power conductor seat 8 on the upper connector of 5 core connectors by resistance R 2) A/D detect mouthful on.By detecting the variation of A/D mouth voltage, reach the object that detects water temperature.Meanwhile, after the upper probe 4 of pot body cavity volume internal upper part being connected to 1 core on the upper connector of 5 core connectors 6 and being connected with 1 core on lower connector in power conductor seat 8, be connected to controller 10(MCU by resistance R 4) A/D1 detection mouth on.Control circuit is gone up the variation of the resistance between probe 4 and lower probe 5 by detection,, by detecting the variation of A/D1 mouth voltage, reach the object that judges whether liquid overflows.
Water temperature detects the operation principle of controlling: as shown in Figure 2, line voltage carries out step-down by reduction voltage circuit (such as RC reduction voltage circuit, transformer), after over commutation, filtering, mu balanced circuit (or passing through Switching Power Supply), be converted into the needed DC voltage of controller 10 (MCU) (as DC5V).In the time pressing START/STOP button, relay R ELAY node closure, by sensor (as NTC), send water temperature signal (voltage signal) to controller 10(MCU) A/D mouth, dividing potential drop=Rntc/ (10+Rntc) * VDD on A/D mouth, along with the variation of water temperature, the voltage of A/D mouth also changes thereupon.Water temperature is higher, temperature sensor 7(NTC) resistance less, the voltage on A/D mouth is lower.Controller 10(MCU) analog voltage of A/D mouth is converted to data signal, by lookup table mode, find out water temperature value corresponding to this data signal, thereby reach the object of control.
For example: get R1=10K, the temperature sensor 7(NTC 25 ° time) resistance is 100K, and the resistance 100 ° time is 6.5K.Controller 10(MCU) select 5V power supply, establish controller 10(MCU) be 8 a/d conversions.In the time that water temperature is 25 °, the voltage Va/d that is now applied to A/D mouth is: Va/d=100/ (100+10) * 5=4.545V
Controller 10(MCU) conversion value be: 4.545/5*256=232(explanation: 28 power=256)
In the time that water temperature is 100 °, the voltage Va/d that is now applied to A/D mouth is:
Va/d=6.5/(6.5+10)*5=1.969V
Controller 10(MCU) conversion data signal be: 1.969/5*256=100
Finding the corresponding water temperature value of this data signal 100 by tabling look-up is 100 °, thereby closed relay quits work heat-generating disc 2.
Under normal condition, owing to not having moisture to overflow, the water resistance between upper and lower probe is very large, dividing potential drop to A/D1 mouth is negligible, and voltage=R6/ (R5+R6) * VDD of this mouthful, in the time having moisture to overflow, the water resistance of upper and lower probe diminishes, thereby affects the dividing potential drop of this mouthful.Whether software, by detecting the variation of this mouthful of voltage, overflows thereby know.In the time that program judgement is overflowed, power cutoff or reduce heating power, reaches and prevents the object of overflowing.
For example: get R5=10K, R6=100K, in the time not having moisture to overflow, water resistance=2M Ω of upper probe, lower probe, supply voltage VDD=5V, establishes controller 10(MCU) be 8 a/d conversions.?
Va/d1=(100//2000)/(10+100//2000)*5=95.23/(10+95.23)*5=4.524V
Controller 10(MCU) conversion value be: 4.524/5*256=231
In the time that generation moisture overflows, get the water resistance=10K of probe, lower probe:
Va/d1=(100//10)/(10+100//10)*5=9.09/(10+9.09)*5=2.283V
Controller 10(MCU) conversion data signal be: 2.283/5*256=116
Overflow determination methods: as set the conversion value <150 of A/D mouth in program, be judged to be to overflow.Can be in conjunction with the temperature of water in pot body and the comprehensive judgement of the conversion value of overfall size, under normal barometric pressure, most of food is in the time overflowing, and the temperature of water will reach more than 95 °.So in program, setting is worked as water temperature and exceeded 90 °, and the conversion value <150 of overfall, judgement is overflowed.Along with the increase of the degree of overflowing, it is relatively less that this value can become, and according to this variation relation, take to cut off the electricity supply or reduce heating power (overflow as firm generation, power is down to 50%, serious if judgement is overflowed, cut off the electricity supply) etc. means, reached and prevented the object of overflowing.
Fig. 3 and Fig. 4 are the connected modes of a kind of distortion of Fig. 2, upper probe 4, lower probe 5 are directly parallel in to the two ends of temperature sensor NTC.Other 2 cores by five core connectors 6 are connected to controller 10(MCU) A/D mouth, in the time not having moisture content to overflow, because the resistance between probe is very large, is the temperature of pot body water so A/D mouth detects.When water level occurring while overflowing, due to the resistance between probe become smaller, so the voltage between A/D mouth is undergone mutation, according to this variation, thereby judgement is overflowed and program.
Embodiment bis-, as shown in Figure 3.Circuit in power conductor seat connects (in large dotted line frame): power line, power circuit, control circuit, the lower connector of 5 core connectors 6 is positioned in power conductor seat, by the L utmost point, the N utmost point, E earthing pole is connected on 3 cores of respective terminal of the lower connector in power conductor seat 8, will with the temperature sensor 7(NTC of pot on body 1) one end of the terminal that is connected of one end is connected on 1 core of lower connector of 5 core connectors 6, the other end is connected to behind the negative terminal of dc source and one end of capacitor C 1, be connected to controller 10(MCU by capacitor C 1 and resistance R 2) A/D port on, one end of the terminal that will be connected with the upper probe 4 on pot body 1 is connected on another 1 core of lower connector, the other end and resistance R 1, R2, after one end of capacitor C 1 connects, be connected to controller 10(MCU by resistance R 2) A/D port on.Pot circuit with it connects (in little dotted line frame): heat-generating disc 2, temperature sensor 7(NTC), upper probe 4, the upper connector of lower probe 5 and 5 core connectors 6 is positioned on pot body 1, one end of heater element on heat-generating disc 3 is connected on 1 core of the corresponding lower connector L utmost point on the upper connector of 5 core connectors 6, the other end of the heater element on heat-generating disc 3 is connected on 1 core of the corresponding lower connector N utmost point of the upper connector of 5 core connectors 6, by temperature sensor 7(NTC) one end be connected with lower probe 5 after, be connected on another 1 core on the power supply E line earthing pole terminal of corresponding lower connector of connector, be also connected on the terminal of another 1 core of corresponding lower connector connection DC power cathode and C1 simultaneously, lower probe 5 is connected with the lower surface of heat-generating disc 2, form the no-spill lower probe 5 of tracer liquid.After the upper probe 4 that is positioned at pot body cavity volume internal upper part is wired to corresponding lower connector and is connected with R1, R2, C1 one end, be connected to controller 10(MCU by resistance R 2) the terminal of A/D port on 1 core of upper connector on.
Because the upper connector of 5 core connectors 6 is fixed on pot body 1, on the fixing online seat 8 of lower connector, in the time that pot body 1 is placed in power conductor seat 8, each respective electrode is all that corresponding contact is connected, for this reason, just realized the temperature sensor 7(NTC on body 1 by pot) one end be connected with the power supply E on heat-generating disc 2 after, be connected with the E line end on lower connector in power conductor seat 8 and with being connected of DC power cathode and capacitor C 1 one end, and pass through C1, R2 is connected to controller 10(MCU) A/D detect mouthful on, and temperature sensor 7(NTC) the other end be connected to C1 by 1 core of the lower connector in 1 core and power conductor seat on the upper connector of 5 core connectors, one end of R1 and R2, by detecting the variation of A/D mouth voltage, reach the object that detects water temperature.The upper probe 4 of pot body cavity volume internal upper part being connected to 1 core on the upper connector of 5 core connectors is connected with 1 core on lower connector in power conductor seat 8, be connected with one end of C1, R1 and R2, then be connected to controller 10(MCU by resistance R 2) A/D detect mouthful on, by detecting the variation of A/D mouth voltage, reach the object that judges whether liquid overflows.Here detecting water temperature and overflow is all the variation that detects A/D mouth voltage, being detected temperatures sensor 7(NTC) voltage change that causes of the variation of resistance differentiates, key is while differentiating water temperature, temperature sensor 7(NTC) change in resistance be more smooth-going, what show is that voltage change is more smooth-going, and control circuit is differentiated for normal water temperature variation.And in the time having overflow, between upper probe 4 and lower probe 5, there is liquid, be equivalent between probe 4 and lower probe 5 is that NTC two ends have connected a less resistance, thereby cause temperature sensor 7(NTC) the sudden change of resistance, also just caused the sudden change of voltage, control circuit detects the sudden change of A/D mouth voltage, is judged as and has and overflow.
Embodiment tri-, as shown in Figure 4.Circuit in power conductor seat connects (in large dotted line frame): power line, power circuit, control circuit, the lower connector of 5 core connectors is positioned in power conductor seat 8, by the L utmost point, the N utmost point, E earthing pole is connected on 3 cores of respective terminal of the lower connector in power conductor seat, will with temperature sensor 7(NTC with it of pot) one end of the terminal that is connected of one end and upper probe 4 is connected on 1 core of lower connector of 5 core connectors 6, the other end and resistance R 1, R2, after one end of capacitor C 1 connects, be connected to controller 10(MCU by resistance R 2) A/D port on.Will with the temperature sensor 7(NTC of pot on body 1) one end of the terminal that is connected with lower probe 5 of the other end is connected on another 1 core of lower connector.After the negative terminal that the other end is connected to dc source is connected with one end of capacitor C 1, be connected to controller 10(MCU by capacitor C 1 and resistance R 2) A/D port on.Circuit on pot body 1 connects (in little dotted line frame): heat-generating disc 2, temperature sensor 7(NTC), upper probe 4, the upper connector of lower probe 5 and 5 core connectors 6 is positioned on pot body 1, one end of heater element on heat-generating disc 3 is connected on 1 core of the corresponding lower connector L utmost point on the upper connector of 5 core connectors 6, the other end of the heater element on heat-generating disc 3 is connected on 1 core of the corresponding lower connector N utmost point of the upper connector of 5 core connectors 6, the wire connecting with heat-generating disc 2 lower surfaces is connected on 1 core of the upper connector corresponding with lower connector E earthing pole, by temperature sensor 7(NTC) one end be connected with lower probe 5 after, be connected on another 1 core on the terminal of lower probe 5 of the corresponding lower connector of connector, the lower probe 5 is here the lower position being fixed in pot body cavity volume, form the no-spill lower probe of tracer liquid.By temperature sensor 7(NTC) the other end be connected with upper probe 4 after, be connected on another 1 core on the terminal of upper probe 4 of the corresponding lower connector of connector, the upper probe 4 is here the upper position being fixed in pot body cavity volume, forms the no-spill upper probe of tracer liquid.Also, after being just equivalent to the upper probe 4 that is positioned at pot body cavity volume internal upper part to be connected to that lower connector is corresponding and to be connected with R1, R2, C1 one end, be connected to controller 10(MCU by resistance R 2) A/D port on.
Because the upper connector of 5 core connectors 6 is fixed on it pot, on the fixing online seat 8 of lower connector, in the time that pot body is placed in power conductor seat, each respective electrode is all that corresponding contact is connected, for this reason, just realized temperature sensor 7(NTC with it of pot) one end be connected with the upper probe 4 of the body cavity volume internal upper part of stewing after, be connected on 1 core of connector, being passed through 1 core on the upper connector of 5 core connectors connects with 1 the corresponding core on lower connector in power conductor seat 8, and be connected C1, one end of R1 and R2 is connected, then be connected to controller 10(MCU by R2) A/D detect mouthful on.By temperature sensor 7(NTC) the other end be fixed on pot body cavity volume in after the lower probe 5 of bottom is connected, be connected on another 1 core of connector, be connected with another 1 core on lower connector in power conductor seat by 1 core on the upper connector of 5 core connectors, then be connected to C1 and DC power cathode, and be connected to controller 10(MCU by C1, R2) A/D detect mouthful on.Controller 10(MCU) control circuit stews temperature sensor 7(in body cavity volume as NTC by detection) variation of resistance, i.e. the variation of coolant-temperature gage, by detecting the variation of A/D mouth voltage, reaches the object that detects water temperature.Controller 10(MCU) control circuit is by the stew variation of the liquid resistance between the lower probe of bottom in the upper probe of body cavity volume internal upper part and pot body cavity volume of detection, by detecting the variation of A/D mouth voltage, reach detection and judge the object whether liquid overflows, here detecting water temperature and overflow is all the variation that detects A/D mouth voltage, being detected temperatures sensor 7(NTC) voltage change that causes of the variation of resistance differentiates, key is while differentiating water temperature, temperature sensor 7(NTC) change in resistance be more smooth-going, what show is that voltage change is more smooth-going, control circuit is differentiated for normal water temperature variation.And in the time having overflow, between upper probe 4 and lower probe 5, there is liquid, be equivalent between probe 4 and lower probe 5 is that NTC two ends have connected a less resistance, thereby cause temperature sensor 7(NTC) the sudden change of resistance, also just caused the sudden change of voltage, control circuit detects the sudden change of A/D mouth voltage, is judged as and has and overflow.
Example: establish water temperature to overflowing 95 ° time, resistance=10K of NTC, gets R5=10K, R6=100K, in the time not having moisture to overflow, water resistance=2M Ω of upper probe, lower probe, supply voltage VDD=5V, establishes controller 10(MCU) be 8 a/d conversions.?
Va/d1=(10//2000)/(10+10//2000)*5=9.95/(10+9.95)*5=2.493V
Controller 10(MCU) conversion value be: 2.493/5*256=127
In the time that generation moisture overflows, get the water resistance=10K of probe, lower probe:
Va/d1=(10//10)/(10+10//10)*5=5/(10+5)*5=1.66V
Controller 10(MCU) conversion value be: 1.66/5*256=84
Overflow determination methods: for Fig. 3, the connecting circuit of Fig. 4, anti-spilled upper probe and lower probe are to be connected in parallel on the temperature sensor NTC two ends of detecting water temperature, in the time that liquid does not overflow, what control circuit detected is that normal water temperature changes, because temperature sensor 7(NTC) be arranged on the upper of heat-generating disc, directly contact with liquid, the variation of fluid temperature directly affects temperature sensor 7(NTC) the variation of resistance, and, because upper probe is not touch liquid in pot body cavity volume in the time not overflowing, therefore, upper probe and liquid are directly air, go up between probe and lower probe resistance very large, on the temperature sensor 7(NTC of normal detected temperatures) resistance do not affect.In the time overflowing, upper probe contacts with liquid, because liquid is the liquid that has boiled food, the liquid of conduction, so just make the resistance between probe and lower probe suddenly reduce, the two ends of temperature sensor NTC are equivalent to and have gone up a less resistance, the temperature sensor 7(NTC that water temperature is detected) the corresponding value of tabling look-up undergos mutation, surmount 100 ° of the value of tabling look-up, for this reason, will there is a sudden change in A/D conversion value, in the time that water temperature exceedes 90 °, what produce overflows, and the value of tabling look-up that makes water temperature is exceeded to 100 °, thereby can judge to produce overflows.Can also, by retaining the water temperature value of previous moment section, when water temperature+mono-fixed value of current water temperature > previous moment section of tabling look-up, think and overflow.And can, according to the size exceeding, judge the degree of overflowing, and then take to cut off the electricity supply or reduce the means such as power, reach anti-overflow object.
Probe and the anti-spilled probe of lower probe on increasing in electrical heating pot, utilize other 2 cores except the L utmost point being connected with power supply, the N utmost point, 3 cores of the E utmost point in 5 core connectors, by the improvement to control circuit and programming, can realize electrical heating pot water temperature, the detection of overflowing and control simultaneously, have practical, easy to use, cost is low, control the advantages such as reliable, effectively promoted the market competitiveness of electrical heating pot.
Claims (5)
1. one kind is provided with electrical heating pot of anti-spilling structure, comprise pot body (1) and line seat (8), in pot body (1), be provided with heat-generating disc (2) and temperature sensor (7), in line seat (8), be provided with power supply and controller (10), pot body (1) and line seat (8), by 5 core electric connector (6) electrical connections, is characterized in that:
On pot body (1), anti-overflow checkout gear is set, anti-overflow checkout gear comprises probe (4) and lower probe (5), and upper probe (4) is arranged on pot body cavity volume internal upper part, and lower probe (5) is arranged on the bottom or heat-generating disc (2) in cavity volume; 5 core electric connectors (6), wherein 3 cores are connected with the power supply L utmost point, the N utmost point, E earthing pole, and other 2 cores are connected with temperature sensor (7) and upper probe (4), lower probe (5), and one end of 2 online seats of core (8) is connected to controller (10).
2. electrical heating pot that is provided with anti-spilling structure according to claim 1, is characterized in that: described upper probe (4) is apart from allowing maximum stage position more than 1 centimetre.
3. electrical heating pot that is provided with anti-spilling structure according to claim 1, it is characterized in that: temperature sensor (7) one end is connected with resistance R 1, R2 and one end of capacitor C 1 by 5 core connectors (6), then be connected on the A/D port of controller (10) by resistance R 2, the other end of temperature sensor (7) is connected to one end of lower probe (5), and then being connected to dc source negative terminal and power supply E line end, lower probe (5) is fixed on the lower surface of heat-generating disc (2); One end of upper probe (4) is connected on the A/D1 port of controller (10) by resistance R 4 behind the one end by 5 core connector (6) contact resistance R4, R5, R6 and capacitor C 2.
4. electrical heating pot that is provided with anti-spilling structure according to claim 1, it is characterized in that: one end of temperature sensor (7) is connected to behind the negative terminal of dc source and one end of capacitor C 1 by 5 core connectors (6), be connected to by capacitor C 1 and resistance R 2 on the A/D port of controller (10), this end is connected to after being also connected with lower probe (5) on the power supply E line earthing pole terminal of 5 core connectors (6) simultaneously, lower probe (5) is connected with the lower surface of heat-generating disc (2), one end of upper probe (4) is by 5 core connectors (6) and resistance R 1, R2, after one end of capacitor C 1 connects, be connected to by resistance R 2 on the A/D port of controller (10).
5. electrical heating pot that is provided with anti-spilling structure according to claim 1, it is characterized in that: one end of temperature sensor (7) is connected with one end of upper probe (4) by 5 core connectors (6) and resistance R 1, R2, after one end of capacitor C 1 connects, be connected to by resistance R 2 on the A/D port of controller (10), upper probe (4) is fixed on the upper position in pot body cavity volume, after being connected with lower probe (5), the other end of temperature sensor (7) is connected to the other end of capacitor C 1 by 5 core connectors (6), lower probe (5) is fixed on the lower position in pot body cavity volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320828080.0U CN203633984U (en) | 2013-12-13 | 2013-12-13 | Electric heating pot with anti-spill structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320828080.0U CN203633984U (en) | 2013-12-13 | 2013-12-13 | Electric heating pot with anti-spill structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203633984U true CN203633984U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103637681A (en) * | 2013-12-13 | 2014-03-19 | 深圳市北鼎晶辉科技股份有限公司 | Electric heating cooker with anti-overflow structure and overflow judgment method |
| CN105615613A (en) * | 2014-11-07 | 2016-06-01 | 浙江苏泊尔家电制造有限公司 | Cooking device |
| CN107874610A (en) * | 2016-09-30 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | Anti-overflow detection means and cooking apparatus for cooking apparatus |
-
2013
- 2013-12-13 CN CN201320828080.0U patent/CN203633984U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103637681A (en) * | 2013-12-13 | 2014-03-19 | 深圳市北鼎晶辉科技股份有限公司 | Electric heating cooker with anti-overflow structure and overflow judgment method |
| CN105615613A (en) * | 2014-11-07 | 2016-06-01 | 浙江苏泊尔家电制造有限公司 | Cooking device |
| CN105615613B (en) * | 2014-11-07 | 2019-11-19 | 浙江苏泊尔家电制造有限公司 | Cooker |
| CN107874610A (en) * | 2016-09-30 | 2018-04-06 | 佛山市顺德区美的电热电器制造有限公司 | Anti-overflow detection means and cooking apparatus for cooking apparatus |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20140611 Effective date of abandoning: 20160817 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |