CN107145173A - Temperature sampling circuit, temperature sampling control method and household electrical appliance - Google Patents
Temperature sampling circuit, temperature sampling control method and household electrical appliance Download PDFInfo
- Publication number
- CN107145173A CN107145173A CN201610892505.2A CN201610892505A CN107145173A CN 107145173 A CN107145173 A CN 107145173A CN 201610892505 A CN201610892505 A CN 201610892505A CN 107145173 A CN107145173 A CN 107145173A
- Authority
- CN
- China
- Prior art keywords
- temperature
- circuit
- resistance
- triode
- sensing device
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
Abstract
The present invention relates to field of circuit technology, disclose a kind of temperature sampling circuit, temperature sampling control method and household electrical appliance, including temperature measurement circuit, temperature to sense sampled point, and be converted to voltage, the temperature measurement circuit includes temperature sensing device I and temperature sensing device II, respectively to sense the temperature value of different temperatures scope；ON-OFF control circuit, to control being switched on or switched off for temperature sensing device I and temperature sensing device II；Governor circuit, to gather the voltage of temperature measurement circuit and being switched on or switched off for controlling switch control circuit, according to the corresponding temperature sensing device temperature sensor of different temperatures scope, collecting temperature data, the highly sensitive sampling of wide temperature range is realized, the responsiveness and temperature measurement accuracy of circuit is improved.
Description
Technical field
The present invention relates to field of circuit technology, in particular it relates to a kind of temperature sampling circuit, temperature sampling control method and
Household electrical appliance.
Background technology
Many household electrical appliance, such as culinary art, the course of work of electric heating appliance product be with temperature it is inseparable, for
Cook class household electrical appliance, such as electromagnetic oven, because different food there are different cooking temps, to heating class household electrical appliance, such as electricity
Hot warmer, different user has different temperature requirements, and different user's operations have different temperature adjusting processes.With life
The flat raising of running water, operational requirements increase of the user to household appliances, it is desirable to also corresponding to improve, for cooking, warming oneself
The temperature control and precision of household appliances propose higher requirement.
Current heating electric appliances product is that built-in resistive temperature sensing device goes sensing temperature mostly, but this resistive
Temperature sensing device has itself inevitable defect.For example, for the resistive temperature detector of negative sense of the conventional sensing pan temperature of electromagnetic oven
Part, the rate of change of resistance is just smaller after temperature exceedes certain limit, thus the sensitivity of temperature-sensitive is just big when temperature is higher
Big reduction, sensing temperature differs greatly with actual temperature.
The content of the invention
It is an object of the invention to provide a kind of temperature sampling circuit, temperature sampling control method and household electrical appliance, the temperature
Sensitivity of the sample circuit in the range of different temperature ranges in the different temperature sensing device of correspondence, wide temperature range is higher,
Improve response speed and temperature measurement accuracy.
To achieve these goals, the present invention provides a kind of temperature sampling circuit, including temperature measurement circuit, to sense sampling
The temperature of point, and voltage is converted to, the temperature measurement circuit includes temperature sensing device I and temperature sensing device II, respectively to sense not equality of temperature
Spend the temperature value of scope；ON-OFF control circuit, to control being switched on or switched off for temperature sensing device I and temperature sensing device II；Master control electricity
Road, to gather the voltage of temperature measurement circuit and being switched on or switched off for controlling switch control circuit.
Preferably, the temperature sensing device I is using the thermistor T1 of negative temperature coefficient, and the temperature sensing device II is using positive temperature
Spend the thermistor T2 of coefficient；In the range of less than design temperature T0, the resistance exponentially type decay of the T1；More than setting
In the range of temperature T0, the resistance exponentially type of the T2 increases；Wherein, T0 scope is 70-120 DEG C.
Preferably, the temperature measurement circuit also includes resistance R2, resistance R4, switch S1 and switch S2；The thermistor T2
Power supply VCC, other end ground connection are accessed in one end through the resistance R2；Power supply is accessed in described thermistor T1 one end through the switch S1
VCC, the other end is grounded through the switch S2 and resistance R4；With the electricity between the thermistor T1 and the switch S2
Connection between the R2 and thermistor T1 is hindered, the sampling end TMIAN-IN of governor circuit is accessed.
Preferably, the temperature measurement circuit also includes resistance R3, and the thermistor T2 is through the resistance R3 and the resistance
R4 is grounded.
Preferably, the temperature measurement circuit also includes：Resistance R1, the temperature measurement circuit accesses governor circuit by resistance R1
Sampling end TMIAN-IN；Electric capacity C1, the sampling end TMIAN-IN of the governor circuit is grounded by electric capacity C1.
Preferably, the ON-OFF control circuit includes triode Q1, triode Q2, coil K1 and coil K2；Three pole
Pipe Q1 and the triode Q2 base stage are connected with the control end CTRL of the governor circuit；The colelctor electrode of the triode Q1 leads to
The colelctor electrode for crossing coil K1 access the power vds D, the triode Q2 accesses power vd D by the coil K2；Described three
Pole pipe Q1 and the triode Q2 grounded emitter；The coil K1 and the switch S1 coupling, the coil K1 obtain it is electric or
Dead electricity drives switch S1 adhesives or opening；The coil K2 and switch S2 couplings, the coil K2 obtains electric or dead electricity and driven
Switch S2 adhesives or opening.
Preferably, the ON-OFF control circuit also base stage including R5, the triode Q1 and the triode Q2 passes through
The control end CTRL of the R5 connections governor circuit.
Preferably, the ON-OFF control circuit also includes diode D1, diode D2, electric capacity C2 and electric capacity C3；Described two
Pole pipe D1 negative poles meet power vd D, and positive pole connects the colelctor electrode of the triode Q1；The diode D2 negative poles meet power vd D, positive pole
Connect the colelctor electrode of the triode Q2；Described electric capacity C2 one end connects the base stage of the triode Q1, other end ground connection；The electricity
Hold the base stage that C3 one end connects the triode Q2, other end ground connection.
The present invention also provides a kind of temperature sampling control method, including：Gather the temperature value of sampled point；By described in collection
Temperature value is compared with set temperature value；When the temperature value is more than the set temperature value, the temperature-sensitive of positive temperature coefficient is used
Device senses the temperature of the sampled point；When the temperature value is less than the set temperature value, the sense of negative temperature coefficient is used
Warm device senses the temperature of the sampled point.
The present invention also provides a kind of household electrical appliance, and the household electrical appliance include temperature sampling circuit as described above.
By above-mentioned technical proposal, governor circuit controlling switch control circuit is switched on or switched off, and is selected with controlling switch circuit
Different temperature sensing device in logical temperature measurement circuit, temperature measurement circuit includes temperature sensing device I and temperature sensing device II, respectively to sense difference
The temperature value of temperature range；Realize the sensing of total temperature scope.Negative temperature coefficient is respectively adopted in temperature sensing device I and temperature sensing device II
Thermistor T1 and positive temperature coefficient thermistor T2, within the scope of different temperature, use different temperature sensing device senses
Answer temperature.The characteristic that positive and negative temperature coefficient thermistor T1 and T2 resistance is varied with temperature is combined, is made in wide temperature model
There is higher sampling sensitivity in enclosing.
The collection of temperature is realized by way of gathering partial pressure, when switching S1 and switch S2 disconnects, thermistor T1 institutes
Branch road disconnect, branch road where thermistor T2 is connected, between thermistor T2 and resistance R2 series connection access VCC and ground,
Thermistor T2 resistance is varied with temperature, and then is become from the sampling end TMIAN-IN thermistor T2 measured partial pressure with resistance
Change, obtain the corresponding relation of thermistor T2 partial pressures and temperature change.When switch S1 is connected with switch S2, switch S2 short circuit heat
Quick resistance T2, the branch road that switch S1 is connected where thermistor T1, now, resistance R2 and thermistor T1 are in parallel, are connected on power supply
Between VCC and resistance R4, thermistor T1 resistances are varied with temperature, the intrinsic standoff ratio after thermistor T1 and resistance R2 are in parallel also with
Change, temperature value is obtained by the corresponding relation for prestoring partial pressure-resistance-temperature into governor circuit.Circuit structure letter
Single, sampling configuration switching is flexible.
And switch S1, S2 and controlled by the conducting of triode Q1, Q2 in ON-OFF control circuit and cut-off, ON-OFF control circuit
Simple in construction, cost is low.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute a part for specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the temperature sampling circuit control program figure of one embodiment of the present invention；
Fig. 2 is that the negative tempperature coefficient thermistor T1 resistances of one embodiment of the present invention vary with temperature curve；
Fig. 3 is that the semistor T2 resistances of one embodiment of the present invention vary with temperature curve；
Fig. 4 is positive and negative temperature coefficient thermistor T1, T2 of combination of the temperature sampling circuit of one embodiment of the present invention
Resistance vary with temperature curve；
Fig. 5 is the temperature sampling circuit connection figure of one embodiment of the present invention；
Fig. 6 is the temperature sampling circuit connection figure of another embodiment of the present invention；
Fig. 7 is the temperature sampling circuit low-temperature measurement equivalent circuit diagram of one embodiment of the present invention；
Fig. 8 is the temperature sampling circuit high temperature measurement equivalent circuit diagram of one embodiment of the present invention；
Fig. 9 is the temperature sampling control method flow chart of one embodiment of the present invention.
Description of reference numerals
The temperature measurement circuit of 11 governor circuit, 21 ON-OFF control circuit 31
41 sampled points
Embodiment
The embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
Fig. 1 is the temperature sampling circuit control program figure of one embodiment of the present invention.As shown in figure 1, the present invention is a kind of
The temperature sampling circuit of embodiment, including temperature measurement circuit 31, to sense the temperature of sampled point 41, and are converted to voltage, should
Temperature measurement circuit 31 includes temperature sensing device I and temperature sensing device II, respectively to sense the temperature value of different temperatures scope；Switch control
Circuit 21, to control being switched on or switched off for temperature sensing device I and temperature sensing device II；Governor circuit 11, to gather temperature measurement circuit
31 voltage and controlling switch controls being switched on or switched off for circuit 21.
In such scheme, circuit 21 is controlled to be switched on or switched off by the controlling switch of governor circuit 11, with controlling switch circuit
Temperature sensing devices different in temperature measurement circuit 31 are gated, temperature measurement circuit 31 includes temperature sensing device I and temperature sensing device II, respectively to feel
Answer the temperature value of different temperatures scope；Realize the sensing of total temperature scope.
According to one embodiment of the present invention, the temperature sensing device I is using the thermistor T1 of negative temperature coefficient, the sense
Warm device II uses the thermistor T2 of positive temperature coefficient；In the range of less than design temperature T0, the resistance exponentially of the T1
Type decays；In the range of more than design temperature T0, the resistance exponentially type of the T2 increases；Wherein, T0 scope is 70-120
℃。
Fig. 2 is that the negative tempperature coefficient thermistor T1 resistances of one embodiment of the present invention vary with temperature curve.Such as Fig. 2
It is shown, it is less than in sampled point temperature in the range of design temperature T0, the resistance of the negative tempperature coefficient thermistor T1 is in temperature
Exponential decay, and rate of change is larger, and larger resistance difference is obtained with the temperature range of very little, change in resistance is bright
It is aobvious.Within the temperature range of less than T0, the temperature sensing device I is the temperature range in higher sensitivity varied with temperature, and R0-Rn is
Standard resistance range in higher sensitivity.
Fig. 3 is that the semistor T2 resistances of one embodiment of the present invention vary with temperature curve.Such as Fig. 3
Shown, when temperature is more than T0, with temperature, exponentially type increases semistor T2 resistance, and rate of change is larger,
Larger resistance difference is obtained with the temperature range of very little, most value changes are obvious.Within the temperature range of more than T0,
The temperature sensing device II is the temperature range in higher sensitivity varied with temperature, and R0-Rn is Standard resistance range in higher sensitivity.
Fig. 4 is that the temperature sampling circuit of one embodiment of the present invention combines positive and negative temperature coefficient thermistor T1
Curve is varied with temperature with T2 resistance.As shown in figure 4, the temperature measurement circuit of one embodiment of the present invention combines two kinds of differences
The temperature sensing device of temperature characterisitic, employs change in resistance of the negative tempperature coefficient thermistor T1 in T1'-T0 temperature ranges, uses
Change in resistance of the semistor T2 in T0-Tn temperature ranges.It is threshold of senstitivity to select T0, in the same of gathered data
When be compared in real time with T0.When temperature is less than T0, negative tempperature coefficient thermistor T1 is gated, using negative temperature coefficient heat-sensitive
The characteristic that resistance T1 resistance is varied with temperature；When temperature is higher than T0, semistor T2 is gated, using positive temperature
The characteristic that degree coefficient resistance T2 resistance is varied with temperature.R0-Rn is Standard resistance range in higher sensitivity.T1'-Tn is electricity
The operating temperature range of device.Whole temperature characteristics ensure that within the temperature range of T1'-Tn it is all shape in higher sensitivity
State.
In such scheme, T0 scope can be for example 80-100 DEG C, be that the change of sensitivity of existing thermistor is brighter
Aobvious interval.As one embodiment of the present invention, it is 90 DEG C that T0, which can be set, is selected in less than 90 DEG C scope internal resistance value exponentiallies
The thermistor T1 of type decay, and the thermistor T2 increased in more than 90 DEG C scope internal resistance value exponentially types.
Fig. 5 is the temperature sampling circuit connection figure of one embodiment of the present invention.Implement as shown in figure 5, the present invention is a kind of
In the temperature sampling circuit of mode, the temperature measurement circuit 31 also includes resistance R2, resistance R4, switch S1 and switch S2；The heat
Power supply VCC, other end ground connection are accessed in quick resistance T2 one end through the resistance R2；Described thermistor T1 one end is through the switch S1
Power supply VCC is accessed, the other end is grounded through the switch S2 and resistance R4；Between the thermistor T1 and the switch S2
It is connected between the resistance R2 and the thermistor T1, accesses the sampling end TMIAN-IN of governor circuit.
In such scheme, when switching S1 and switch S2 disconnects, the branch road where thermistor T1 disconnects, thermistor T2
The branch road at place is connected, and between thermistor T2 and resistance R2 series connection access VCC and ground, thermistor T2 resistance becomes with temperature
Change, so from sampling end TMIAN-IN measure thermistor T2 partial pressure with change in resistance, obtain thermistor T2 partial pressures with
The corresponding relation of temperature change.Temperature is obtained by the corresponding relation for prestoring partial pressure-resistance-temperature into governor circuit
Value.
When switch S1 is connected with switch S2, S2 short circuit thermistor T2 are switched, switch S1 connects thermistor T1 places
Branch road, now, resistance R2 and thermistor T1 are in parallel, are connected between power supply VCC and resistance R4, thermistor T1 resistances are with temperature
Intrinsic standoff ratio after degree change, thermistor T1 and resistance R2 parallel connections also changes therewith, by prestoring point into governor circuit
The corresponding relation of pressure-resistance-temperature obtains temperature value.
According to one embodiment of the present invention, the ON-OFF control circuit include triode Q1, triode Q2, coil K1 and
Coil K2；The triode Q1 and the triode Q2 base stage are connected with the control end CTRL of the governor circuit；Described three
Pole pipe Q1 colelctor electrode is connect by the coil K1 colelctor electrodes for accessing power vd D, the triode Q2 by the coil K2
Enter power vd D；The triode Q1 and the triode Q2 grounded emitter；The coil K1 and switch S1 couplings,
The coil K1 obtains electric or dead electricity and drives switch S1 adhesives or opening；The coil K2 and switch S2 couplings, the coil
K2 obtains electric or dead electricity and drives switch S2 adhesives or opening.
In such scheme, control end CTRL is connected with governor circuit.When temperature is less than T0, control end CTRL inputs are high
Level, by controlling triode Q1 and triode Q2 base stage turn-on transistor Q1 and Q2, so that control coil K1 and coil K2
Switch on power VDD, and the coil K1 and K2 of conducting drive switch S1 and S2 adhesives, gate the branch road where thermistor T1, simultaneously
Branch road where short-circuit thermistor T2, realize by negative temperature coefficient thermistor T1 temperature sensors, collection partial pressure；Temperature is high
When T0, control end CTRL input voltages are higher than VDD or are 0, and triode Q1 and Q2 are turned off, and coil K1 and K2 be not from power supply
VDD is disconnected, and switch S1 and switch S2 are opened, and branch road where disconnecting thermistor T1 is also turned on the branch where thermistor T2
Road, realize by positive temperature coefficient thermistor T2 temperature sensors, collection partial pressure.TMIAN-IN is by the partial pressure data input of collection
Voltage data is converted into temperature data for controlling corresponding operating process into main control module, and by main control module.
Fig. 6 is the temperature sampling circuit connection figure of another embodiment of the present invention.As shown in fig. 6, the present invention is a kind of real
In the temperature sampling circuit for applying mode, the temperature measurement circuit also include resistance R3, the thermistor T2 through the resistance R3 and
The resistance R4 ground connection.
According to one embodiment of the present invention, the temperature measurement circuit also includes：Resistance R1, the temperature measurement circuit passes through resistance
R1 accesses the sampling end TMIAN-IN of governor circuit；Electric capacity C1, the sampling end TMIAN-IN of the governor circuit passes through electric capacity C1
Ground connection.
Fig. 7 is the temperature sampling circuit low-temperature measurement equivalent circuit diagram of one embodiment of the present invention.As shown in fig. 7, this
A kind of temperature sampling circuit low temperature of embodiment is invented, i.e., less than the measurement equivalent circuit in T0 temperature ranges, R1 is current limliting
Resistance, the size of current of control input governor circuit；Resistance R2 and T1 parallel connection and R4 partial pressures, the thermistor T1 of negative temperature coefficient
Resistance diminishes after in parallel with R2, and R4 partial pressure effect can be made to become apparent from responsiveness there is provided voltage-resistance with temperature；Electric capacity C1
It is filter capacitor, filters out burr signal；Now, governor circuit be gather R4 resistance voltage division signal it is defeated by sampling end TMAIN-IN
Enter to governor circuit.When temperature is less than T0, negative tempperature coefficient thermistor T1, as temperature is raised, thermistor T1 are gated
Resistance be gradually reduced, R4 partial pressure then gradually increases.
Fig. 8 is the temperature sampling circuit high temperature measurement equivalent circuit diagram of one embodiment of the present invention.As shown in figure 8, this
A kind of temperature sampling circuit high temperature of embodiment is invented, i.e., more than the measurement equivalent circuit in T0 temperature ranges, R1 is current limliting
Resistance, the size of current of control input governor circuit；R2 is divider resistance, the system point constituted with tri- devices of T2, R3 and R4
Pressure；T2 is the thermistor of positive temperature coefficient, and R3, R4 connect with T2, resistance increase, during gating T2, it is possible to increase partial pressure effect, is carried
The responsiveness of high partial pressures and temperature change；C1 is filter capacitor, filters out burr signal；T2, R3 and R4 partial pressure are by governor circuit
Sampling end TMAIN-IN is gathered and is input to main control module；When temperature is higher than T0, semistor T2 is gated, with
Temperature rise, T2 resistance gradually increases, and the partial pressure of collection gradually increases.
According to one embodiment of the present invention, the ON-OFF control circuit also includes R5, the triode Q1 and described three
Pole pipe Q2 base stage connects the control end CTRL of the governor circuit by R5.
According to one embodiment of the present invention, the ON-OFF control circuit also includes diode D1, diode D2, electric capacity C2
With electric capacity C3；The diode D1 negative poles meet power vd D, and positive pole connects the colelctor electrode of the triode Q1；The diode D2 is born
Pole meets power vd D, and positive pole connects the colelctor electrode of the triode Q2；Described electric capacity C2 one end connects the base stage of the triode Q1,
The other end is grounded；Described electric capacity C3 one end connects the base stage of the triode Q2, other end ground connection.
Fig. 9 is the temperature sampling control method flow chart of one embodiment of the present invention.As shown in figure 9, the present invention is a kind of
The temperature sampling control method of embodiment, including：In step s 110, the temperature value of sampled point is gathered；In the step s 120,
The temperature value of collection is compared with set temperature value；When the temperature value is more than the set temperature value, in step
In S130, the temperature of the sampled point is sensed using the temperature sensing device of positive temperature coefficient；When the temperature value is less than the setting
During temperature value, in step S140, the temperature of the sampled point is sensed using the temperature sensing device of negative temperature coefficient.
In such scheme, when temperature is less than design temperature, the selection interval sense for responding sensitive negative temperature coefficient herein
Warm device, and when temperature is more than design temperature, the temperature sensing device of the sensitive positive temperature coefficient of selection interval response herein.Consider
Different temperature sensing devices has different response characteristics in different temperature ranges, chooses response in different temperature ranges sensitive
Temperature sensing device works, and the temperature sensing device combination acquisition total temperature scope of the interval different sensitivity of different temperatures is responded sensitive
Characteristic curve, to obtain the highly sensitive temperature sampling control method of wide scope.
The present invention also provides a kind of household electrical appliance, and the household electrical appliance include temperature sampling circuit as described above.As above institute
The temperature sampling circuit stated can be applied in such as electromagnetic oven, insulating pot, electric heater culinary art, heating household electrical appliance, or can be used for
Other are required temperature control in higher household electrical appliance.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, still, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, a variety of letters can be carried out to technical scheme
Monotropic type, these simple variants belong to protection scope of the present invention.For example, it is that principle is similar that can expand bleeder circuit
Bleeder circuit, divider resistance R2, R3 and R4 quantity and circuit connection structure can be adjusted according to actual circuit, switch S1 and
S2 can be changed to the other kinds of switching device in addition to coil, relay, can be electric in understanding by the data application of collection
Device working condition or control apparatus mode of operation；Temperature sensing device I and temperature sensing device II can be expanded as other kinds of temperature-sensitive
Device or temperature sensor.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of temperature sampling circuit, it is characterised in that including：
Temperature measurement circuit, to sense the temperature of sampled point, and is converted to voltage, the temperature measurement circuit includes temperature sensing device I and temperature-sensitive
Device II, respectively to sense the temperature value of different temperatures scope；
ON-OFF control circuit, to control being switched on or switched off for temperature sensing device I and temperature sensing device II；
Governor circuit, to gather the voltage of temperature measurement circuit and being switched on or switched off for controlling switch control circuit.
2. circuit according to claim 1, it is characterised in that the temperature sensing device I is electric using the temperature-sensitive of negative temperature coefficient
T1 is hindered, the temperature sensing device II uses the thermistor T2 of positive temperature coefficient；
In the range of less than design temperature T0, the resistance exponentially type decay of the T1；
In the range of more than design temperature T0, the resistance exponentially type of the T2 increases；
Wherein, T0 scope is 70-120 DEG C.
3. circuit according to claim 2, it is characterised in that the temperature measurement circuit also includes resistance R2, resistance R4, switch
S1 and switch S2；
Power supply VCC, other end ground connection are accessed in described thermistor T2 one end through the resistance R2；
Power supply VCC is accessed in described thermistor T1 one end through the switch S1, and the other end is through the switch S2 and resistance R4
Ground connection；
It is connected between the thermistor T1 and the switch S2 between the resistance R2 and the thermistor T1, access master
Control the sampling end TMIAN-IN of circuit.
4. circuit according to claim 3, it is characterised in that the temperature measurement circuit also includes resistance R3, the temperature-sensitive electricity
T2 is hindered to be grounded through the resistance R3 and resistance R4.
5. circuit according to claim 3, it is characterised in that the temperature measurement circuit also includes：
Resistance R1, the temperature measurement circuit accesses the sampling end TMIAN-IN of governor circuit by resistance R1；
Electric capacity C1, the sampling end TMIAN-IN of the governor circuit is grounded by electric capacity C1.
6. circuit according to claim 3, it is characterised in that the ON-OFF control circuit include triode Q1, triode Q2,
Coil K1 and coil K2；
The triode Q1 and the triode Q2 base stage are connected with the control end CTRL of the governor circuit；
The colelctor electrode of the triode Q1 accesses power vd D by the coil K1, and the colelctor electrode of the triode Q2 passes through institute
State coil K2 access power vds D；
The triode Q1 and the triode Q2 grounded emitter；
The coil K1 and switch S1 couplings, the coil K1 obtains electric or dead electricity and drives switch S1 adhesives or opening；It is described
Coil K2 and switch S2 couplings, the coil K2 obtains electric or dead electricity and drives switch S2 adhesives or opening.
7. circuit according to claim 6, it is characterised in that the ON-OFF control circuit also includes R5, the triode
Q1 and the triode Q2 base stage connect the control end CTRL of the governor circuit by R5.
8. circuit according to claim 6, it is characterised in that the ON-OFF control circuit also includes diode D1, two poles
Pipe D2, electric capacity C2 and electric capacity C3；
The diode D1 negative poles meet power vd D, and positive pole connects the colelctor electrode of the triode Q1；
The diode D2 negative poles meet power vd D, and positive pole connects the colelctor electrode of the triode Q2；
Described electric capacity C2 one end connects the base stage of the triode Q1, other end ground connection；
Described electric capacity C3 one end connects the base stage of the triode Q2, other end ground connection.
9. a kind of temperature sampling control method, it is characterised in that including：
Gather the temperature value of sampled point；
The temperature value of collection is compared with set temperature value；
When the temperature value is more than the set temperature value, the sampled point is sensed using the temperature sensing device of positive temperature coefficient
Temperature；
When the temperature value is less than the set temperature value, the sampled point is sensed using the temperature sensing device of negative temperature coefficient
Temperature.
10. a kind of household electrical appliance, it is characterised in that the household electrical appliance include the temperature according to any one of claim 1-8
Spend sample circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610892505.2A CN107145173B (en) | 2016-10-12 | 2016-10-12 | Temperature sampling circuit, temperature sampling control method and household electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610892505.2A CN107145173B (en) | 2016-10-12 | 2016-10-12 | Temperature sampling circuit, temperature sampling control method and household electrical appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107145173A true CN107145173A (en) | 2017-09-08 |
| CN107145173B CN107145173B (en) | 2019-05-03 |
Family
ID=59783151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610892505.2A Active CN107145173B (en) | 2016-10-12 | 2016-10-12 | Temperature sampling circuit, temperature sampling control method and household electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107145173B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107951389A (en) * | 2017-12-26 | 2018-04-24 | 九阳股份有限公司 | A kind of food processor |
| CN109580025A (en) * | 2019-01-23 | 2019-04-05 | 无锡华宸控制技术有限公司 | A kind of wide scope platinum resistance temperature sample circuit |
| CN110044508A (en) * | 2018-01-15 | 2019-07-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its temp measuring method, device |
| CN110095155A (en) * | 2019-05-21 | 2019-08-06 | 深圳洲斯移动物联网技术有限公司 | A kind of control method, temperature-humidity detecting device and temperature/humiditydetection detection system |
| WO2020220880A1 (en) * | 2019-04-30 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Thermal runaway detection circuit and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2204983Y (en) * | 1994-09-03 | 1995-08-09 | 柳名珍 | Multifunctional portable electronic refrigerator with heating function |
| US6250802B1 (en) * | 1999-10-12 | 2001-06-26 | Homecare Technologies Ltd | Electronic thermometer with preheating |
| WO2006100192A1 (en) * | 2005-03-22 | 2006-09-28 | Schneider Electric Industries Sas | Device for switching a electric circuit with a sequential opening system |
| CN1888838A (en) * | 2006-07-19 | 2007-01-03 | 青岛科技大学 | Combined temperature sensor |
| CN104600827A (en) * | 2014-12-05 | 2015-05-06 | 超威电源有限公司 | Composite power supply and control method thereof and electric vehicle with same |
| CN205563313U (en) * | 2016-03-11 | 2016-09-07 | 廊坊开发区欧特克精密电子线束制造有限公司 | Thermistor automatic control temperature control circuit based on 555 timer |
-
2016
- 2016-10-12 CN CN201610892505.2A patent/CN107145173B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2204983Y (en) * | 1994-09-03 | 1995-08-09 | 柳名珍 | Multifunctional portable electronic refrigerator with heating function |
| US6250802B1 (en) * | 1999-10-12 | 2001-06-26 | Homecare Technologies Ltd | Electronic thermometer with preheating |
| WO2006100192A1 (en) * | 2005-03-22 | 2006-09-28 | Schneider Electric Industries Sas | Device for switching a electric circuit with a sequential opening system |
| CN1888838A (en) * | 2006-07-19 | 2007-01-03 | 青岛科技大学 | Combined temperature sensor |
| CN104600827A (en) * | 2014-12-05 | 2015-05-06 | 超威电源有限公司 | Composite power supply and control method thereof and electric vehicle with same |
| CN205563313U (en) * | 2016-03-11 | 2016-09-07 | 廊坊开发区欧特克精密电子线束制造有限公司 | Thermistor automatic control temperature control circuit based on 555 timer |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107951389A (en) * | 2017-12-26 | 2018-04-24 | 九阳股份有限公司 | A kind of food processor |
| CN110044508A (en) * | 2018-01-15 | 2019-07-23 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its temp measuring method, device |
| CN110044508B (en) * | 2018-01-15 | 2021-02-26 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and temperature measuring method and device thereof |
| CN109580025A (en) * | 2019-01-23 | 2019-04-05 | 无锡华宸控制技术有限公司 | A kind of wide scope platinum resistance temperature sample circuit |
| WO2020220880A1 (en) * | 2019-04-30 | 2020-11-05 | 宁德时代新能源科技股份有限公司 | Thermal runaway detection circuit and method |
| US11353515B2 (en) | 2019-04-30 | 2022-06-07 | Contemporary Amperex Technology Co., Limited | Thermal runaway detection circuit and method |
| CN110095155A (en) * | 2019-05-21 | 2019-08-06 | 深圳洲斯移动物联网技术有限公司 | A kind of control method, temperature-humidity detecting device and temperature/humiditydetection detection system |
| CN110095155B (en) * | 2019-05-21 | 2021-08-10 | 深圳洲斯移动物联网技术有限公司 | Control method, temperature and humidity detection device and temperature and humidity detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107145173B (en) | 2019-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107145173B (en) | Temperature sampling circuit, temperature sampling control method and household electrical appliance | |
| CN102949081B (en) | Heating control method for electrical cooking appliance | |
| CN203025135U (en) | Humidity detection device | |
| CN201207144Y (en) | Pressure and temperature monitoring apparatus for electrical heating cook | |
| CN207280619U (en) | A kind of temperature sensing circuit, control panel and cooking appliance | |
| CN106136881A (en) | A kind of insulating pot and using method thereof | |
| CN206469994U (en) | The cooking equipment that a kind of grillING is baked and banked up with earth | |
| CN103674165B (en) | Oil level detection device for oil cup of range hood | |
| CN205353802U (en) | Temperature regulation apparatus and temperature regulation circuit | |
| CN102727021B (en) | Intelligent control DC (direct current) low-voltage electric heating quilt/blanket and intelligent control circuit of intelligent control DC low-voltage electric heating quilt/blanket | |
| CN107951389A (en) | A kind of food processor | |
| CN203606003U (en) | Detection device for oil level of oil cup of range hood | |
| CN207924541U (en) | A kind of multi gear position temperature-control circuit | |
| CN201392254Y (en) | Sound wave anti-overflow temperature measuring device | |
| CN203788480U (en) | Circuit for controlling metal ceramic heating element through bidirectional silicon controlled rectifier | |
| CN2781706Y (en) | Temp. controller of electromagnetic plate | |
| CN209514436U (en) | A kind of constant temperature control circuit and insulating box | |
| CN106549273A (en) | A kind of smart jack | |
| CN206247645U (en) | A kind of fan heater control circuit | |
| CN106980293A (en) | A kind of surface is without button application method | |
| CN111385925B (en) | Electromagnetic cooking appliance and control method thereof | |
| CN208781778U (en) | A kind of circuit and electric cooking apparatus of I/O mouthfuls of multiplexing | |
| CN207935134U (en) | A kind of intelligent temperature control fan assembly of protection motor | |
| CN209202887U (en) | A kind of oven temperature-controlling system and oven | |
| CN208582194U (en) | It is novel can accurate temperature controlling cook stove |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |