CN105375785A - Household electric appliance and switching power supply control circuit and method thereof - Google Patents
Household electric appliance and switching power supply control circuit and method thereof Download PDFInfo
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- CN105375785A CN105375785A CN201510701658.XA CN201510701658A CN105375785A CN 105375785 A CN105375785 A CN 105375785A CN 201510701658 A CN201510701658 A CN 201510701658A CN 105375785 A CN105375785 A CN 105375785A
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- resistance
- parameter threshold
- switching power
- power supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage, current or power
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a Household electric appliance and a switching power supply control circuit and method thereof. The control circuit comprises a detection part, a comparison part and a feedback part, wherein the detection part is connected with a load of a switching power supply and detects a target parameter of the load; the comparison part is connected with the detection part, compares the target parameter with a first parameter threshold and a second parameter threshold greater than the first parameter threshold, and outputs a target level signal according to the comparison result; and the feedback part is connected with the comparison part, adjusts the target voltage value according to the target level signal, and back feeds the target voltage value to a chip of the switching power supply. The control method and circuit can be used to solve the technical problems that the switching power supply is powered on frequently in point type control in the prior art and the performance of the switching power supply is reduced.
Description
Technical field
The present invention relates to electronic technology field, in particular to control circuit and the method for a kind of household electrical appliance and Switching Power Supply thereof.
Background technology
In the prior art, Switching Power Supply in water dispenser or other household electrical appliance is all to change output voltage by feedback, and feedback of the prior art all belongs to point type feedback, point type feedback and Switching Power Supply can only provide a fixing voltage, can not realize segmentation and regulate.
When Switching Power Supply receives feedback, such as feedback is that temperature-sensitive bag detects temperature, when assumed temperature arrives 10 DEG C, Switching Power Supply is just made a response immediately, and then changes output voltage, if temperature has floating, then Switching Power Supply can turn off open-minded frequently back and forth on 10 DEG C of points, unfavorable to the life-span, performance is unfavorable, and Consumer's Experience is unfavorable.And prior art realizes segmentation feedback, large multiplex process sequence module realizes.In prior art, feedback element uses the voltage stabilizing didoe of two or more to connect, but voltage stabilizing didoe is fragile, and voltage error is larger more at most for the voltage-stabiliser tube of series connection, and larger error causes the life-span of the follow-up load seriously shortcoming such as damaged.
For above-mentioned problem, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide control circuit and the method for a kind of household electrical appliance and Switching Power Supply thereof, at least to solve in prior art because point type controls to make Switching Power Supply frequently be energized the technical problem causing Switching Power Supply performance to reduce.
According to an aspect of the embodiment of the present invention, provide a kind of control circuit of Switching Power Supply, comprising: detection part, described detection part is connected with the load of described Switching Power Supply, for detecting the target component of described load; Comparing unit, is connected with described detection part, and for the size of more described target component and the first parameter threshold and the second parameter threshold, and export target level signal according to comparative result, wherein, described first parameter threshold is less than described second parameter threshold; And feedback element, be connected with described comparing unit, for according to described target level Signal Regulation target voltage values, and feed back the switching power source chip of described target voltage values to described Switching Power Supply.
Further, described feedback element comprises: the first voltage stabilizing chip, the first end of described first voltage stabilizing chip is connected with described switching power source chip, the second end ground connection of described first voltage stabilizing chip, and described first voltage stabilizing chip is used for providing stable voltage to described Switching Power Supply; Triode, the base stage of described triode is connected with the output of described comparing unit, the grounded emitter of described triode; First resistance, the first end ground connection of described first resistance, the second end of described first resistance is connected with the emitter of described triode; Second resistance, the first end of described second resistance is connected with the reference edge of described first voltage stabilizing chip, and the second end of described second resistance is connected with the collector electrode of described triode; And the 3rd resistance, the first end of described 3rd resistance is connected with the second end of described second resistance, and the second termination of described 3rd resistance receives high level signal.
Further, described control circuit comprises: Voltage stabilizing module, is connected with described comparing unit, for providing stable voltage for described comparing unit.
Further, described comparing unit comprises: comparable chip, and the output of described comparable chip is connected with the base stage of described triode; 4th resistance, the first end of described 4th resistance is connected with the output of described comparable chip, and the second end of described 4th resistance is connected with the positive input of described comparable chip; 5th resistance, the first end of described 5th resistance is connected with the positive input of described comparable chip, and the second end of described 5th resistance is connected with the output of described detection part; 6th resistance, the first end of described 6th resistance is connected with the reverse input end of described comparable chip, and the second end of described 6th resistance is connected with described Voltage stabilizing module; 7th resistance, the first end of described 7th resistance receives high level signal; And the 8th resistance, the first end of described 8th resistance is connected with the second end of described 5th resistance, and the second end of described 8th resistance is connected with the second end of described 7th resistance.
Further, described Voltage stabilizing module comprises: the second voltage stabilizing chip, and the first end of described second voltage stabilizing chip is connected with the first end of described 7th resistance, the second end ground connection of described second voltage stabilizing chip; 9th resistance, the first end of described 9th resistance is connected with the first end of described second voltage stabilizing chip, and the second end of described 9th resistance is connected with the reference edge of described second voltage stabilizing chip; Tenth resistance, the first end of described tenth resistance is connected with the reference edge of described second voltage stabilizing chip, and described tenth resistance second end is connected with low level; And electric capacity, the first end of described electric capacity is connected with the first end of described second voltage stabilizing chip, the second end ground connection of described electric capacity.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of control method of Switching Power Supply, carried out the control of Switching Power Supply by the control circuit of the Switching Power Supply described in any one of preceding claim, described control method comprises: the target component of the load of sense switch power supply in real time; The size of more described target component and the first parameter threshold and the second parameter threshold, and export target level signal according to comparative result, wherein, described first parameter threshold is less than described second parameter threshold; According to described target level Signal Regulation target voltage values; And feed back the switching power source chip of described target voltage values to described Switching Power Supply.
Further, export target level signal according to comparative result to comprise: when described comparative result is described target component from being greater than described first parameter threshold until when being reduced to described first parameter threshold, the described target level signal that the comparing unit controlling described control circuit exports is high level signal; And when described comparative result be described target component from being less than described second parameter threshold until be increased to described second parameter threshold when, control described comparing unit export described target level signal be low level signal.
Further, comprise according to described target level Signal Regulation target voltage values: when described comparing unit exports described high level signal, control the triode ON of described control circuit, wherein, when described triode ON, second resistive short of described control circuit, the first resistance of described control circuit and the 3rd resistance of described control circuit access the loop of the feedback element of described control circuit; And when the comparable chip of described control circuit exports described low level signal, control described triode and turn off, wherein, when described triode turns off, described second resistance, described first resistance and described 3rd resistance access the loop of described feedback element.
Further, described control method also comprises: when the resistance of the 4th resistance of described control circuit reduces, the difference between described first parameter threshold and described second parameter threshold increases; Or when the resistance of described 4th resistance increases, the difference between described first parameter threshold and described second parameter threshold reduces.
Further, described control method also comprises: when the resistance of the 8th resistance of described control circuit increases, described first parameter threshold and described second parameter threshold all increase, and difference between described first parameter threshold and described second parameter threshold is constant; Or when the resistance of described 8th resistance reduces, described first parameter threshold and described second parameter threshold all reduce, and difference between described first parameter threshold and described second parameter threshold is constant.
According to an aspect of the embodiment of the present invention, provide a kind of household electrical appliance, comprise the control circuit of the Switching Power Supply described in above-mentioned any one.
In embodiments of the present invention, adopt detection part, described detection part is connected with the load of described Switching Power Supply, for detecting the target component of described load; Comparing unit, is connected with described detection part, and for the size of more described target component and the first parameter threshold and the second parameter threshold, and export target level signal according to comparative result, wherein, described first parameter threshold is less than described second parameter threshold; And feedback element, be connected with described comparing unit, for according to described target level Signal Regulation target voltage values, and feed back the mode of described target voltage values to the switching power source chip of described Switching Power Supply.By detection part is detected that target component is sent to debugging unit, target component compares with the first parameter threshold and the second parameter threshold by debugging unit respectively, the output of self is controlled according to comparative result, and by this output feedack to feedback element, feedback element controls according to the output received the target voltage values feeding back to Switching Power Supply, relative to the pattern that prior art breaker in middle power supply is point type feedback, Switching Power Supply break-make back and forth can be made, affect the life-span of Switching Power Supply, reach Switching Power Supply and feed back from point type the object becoming segmentation and feed back, and then solve in prior art because point type controls to make Switching Power Supply frequently be energized the technical problem causing Switching Power Supply performance to reduce.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the control circuit of a kind of Switching Power Supply according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the control circuit according to the optional Switching Power Supply of the another kind of the embodiment of the present invention;
Fig. 3 is the schematic diagram of the control circuit according to the optional Switching Power Supply of the another kind of the embodiment of the present invention; And
Fig. 4 is the flow chart of the control method of a kind of Switching Power Supply according to the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to the embodiment of the present invention, provide a kind of embodiment of control circuit of Switching Power Supply.
Fig. 1 is the schematic diagram of the control circuit of a kind of Switching Power Supply according to the embodiment of the present invention, and as shown in Figure 1, control circuit comprises: detection part 10, comparing unit 20 and feedback element 30, wherein:
Detection part 10, detection part is connected with the load of Switching Power Supply, for detecting the target component of load.
The equipment such as it should be noted that, load can be water dispenser and humidifier, all right water heater, in embodiments of the present invention, choosing load is water dispenser.When load is water dispenser, detection part is the parts detecting water dispenser temperature, and wherein, the parts of detected temperatures can be the parts of thermocouple sensor or thermistor (temperature) sensor composition, can also be the parts of digital temperature sensor composition.Wherein, in FIG and the annexation of not shown load and detection part 10.
Such as, when the temperature sensor chosen is thermistor (temperature) sensor, target component is the resistance value of this thermistor, wherein, when the variations in temperature of water in water dispenser, and the resistance value also proportional example change thereupon of this thermistor.
Comparing unit 20, is connected with detection part, and for the size of comparison object parameter and the first parameter threshold and the second parameter threshold, and export target level signal according to comparative result, wherein, the first parameter threshold is less than the second parameter threshold.
When target component is the resistance value of thermistor, the corresponding resistance value of the first parameter threshold, the corresponding another one resistance value of the second parameter threshold, and resistance value corresponding to the first parameter threshold is greater than resistance value corresponding to the second parameter threshold.Wherein, first parameter threshold and the second parameter threshold form a threshold interval, this threshold interval is expressed as [the first parameter threshold, second parameter threshold], first parameter threshold is the minimum value of this threshold interval, second parameter threshold is the maximum of this threshold interval, and this threshold interval is adjustable.By the first parameter threshold of target component and this threshold interval and the second parameter threshold being compared, and export corresponding target level signal according to comparative result control comparing unit.
It should be noted that, in embodiments of the present invention, target level signal is low level signal or high level signal, and wherein, high level signal represents with " 1 ", and low level signal represents with " 0 ".
Feedback element 30, is connected with comparing unit 20, and for according to target level Signal Regulation target voltage values, and feedback target magnitude of voltage is to the switching power source chip of Switching Power Supply.
Comparing unit 20 is by target level Signal transmissions to feedback element 30, and feedback element 30 is according to the target level Signal Regulation target voltage values received, and wherein, target voltage values is the voltage of the switching power source chip feeding back to Switching Power Supply.And then according to the target voltage values that feedback module feeds back, carry out the output voltage values of control switch power supply.
In embodiments of the present invention, by detection part is detected that target component is sent to debugging unit, target component compares with the first parameter threshold and the second parameter threshold by debugging unit respectively, the output of self is controlled according to comparative result, and by this output feedack to feedback element, feedback element controls according to the output received the target voltage values feeding back to Switching Power Supply, relative to the pattern that prior art breaker in middle power supply is point type feedback, Switching Power Supply break-make back and forth can be made, affect the life-span of Switching Power Supply, reach Switching Power Supply and feed back from point type the object becoming segmentation and feed back, and then solve in prior art because point type controls to make Switching Power Supply frequently be energized the technical problem causing Switching Power Supply performance to reduce.
Fig. 2 is the schematic diagram of the control circuit according to the optional Switching Power Supply of the another kind of the embodiment of the present invention, and as shown in Figure 2, feedback element comprises the first voltage stabilizing chip IC 1, triode Q1, the first resistance R1, the second resistance R2 and the 3rd resistance R3, wherein:
The first end of the first voltage stabilizing chip IC 1 is connected with switching power source chip, and the second end ground connection of the first voltage stabilizing chip IC 1, the first voltage stabilizing chip IC 1 is for providing stable voltage to Switching Power Supply.
The base stage of triode Q1 is connected with the output of comparing unit, the grounded emitter of triode Q1.Wherein, as shown in Figure 2, the control circuit of Switching Power Supply also comprises the 15 resistance R15, and the first end of the 15 resistance R15 is connected with the base stage of triode Q1, the 15 resistance R15 second end ground connection.
The first end ground connection of the first resistance R1, second end of the first resistance R1 is connected with the emitter of triode Q1.
The first end of the second resistance R2 is connected with the reference edge of the first voltage stabilizing chip IC 1, and second end of the second resistance R2 is connected with the collector electrode of triode Q1.
The first end of the 3rd resistance R3 is connected with second end of the second resistance R2, and second termination of the 3rd resistance R3 receives high level signal.
Particularly, as shown in Figure 2, the control circuit of Switching Power Supply also comprises photoelectrical coupler U1, and wherein, the 11 resistance R11, the 12 resistance R12 and the 13 resistance R13 are the clamp resistance of photoelectrical coupler.Wherein, feedback element is connected in switching power source chip by photoelectrical coupler U1.
As shown in Figure 2, IC1 is the first voltage stabilizing chip, wherein, first voltage stabilizing chip can be controllable accurate source of stable pressure (model is: TL431), can also for the Voltage stabilizing module that model is the controllable accurate source of stable pressure of TL431 can be replaced, as preferably, in embodiments of the present invention, the first voltage stabilizing chip IC 1 is chosen for TL431.
It should be noted that, the voltage of the reference edge of the first voltage stabilizing chip IC 1 is V
rEF1, by formula V1=V
rEF1* [1+ (R2+R3)/R1] calculates the target voltage values that the first voltage stabilizing chip IC 1 exports, and wherein, V1 is target voltage values.As can be seen from formula, work as V
rEF1in changeless situation, can realize by regulating the first resistance R1, the second resistance R2 and the 3rd resistance R3 resistance regulating target voltage values V1, and change the target voltage values that feedback element feeds back to switching power source chip, and then change the output voltage of Switching Power Supply.
Triode Q1 can be model be 9013 triode, can also for the triode can replacing 9013.Triode Q1, by receiving the target level signal of comparing unit feedback, and according to this target level signal, controls the shutoff of triode Q1 and open-minded, and then controls the access state of the first resistance R1, the second resistance R2 and the 3rd resistance R3.
When target level signal is high level " 1 ", triode Q1 is open-minded, second resistance R2 is shorted, that access the resistance in feedback element loop is the first resistance R1 and the 3rd resistance R3, the now target voltage values of the output of the first voltage stabilizing chip IC 1, adds the magnitude of voltage of photoelectrical coupler U1 self, obtains total feedback voltage level, and then this total feedback voltage level is fed back to Switching Power Supply, to make Switching Power Supply according to the operating state of total feedback voltage level control load.
In the same manner, when target level signal is low level " 0 ", triode Q1 turns off, and the first resistance R1, the second resistance R2 and the 3rd resistance R3 all access in the loop of feedback element, the now output target voltage values of the first voltage stabilizing chip IC 1, adds the magnitude of voltage of photoelectrical coupler U1 self, obtains total feedback voltage level, and then this total feedback voltage level is fed back to Switching Power Supply, to make Switching Power Supply according to the operating state of total feedback voltage level control load.
Alternatively, as shown in Figure 2, comparing unit comprises: comparable chip U2, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8, wherein:
The output of comparable chip U2 is connected with the base stage of triode Q1.
The first end of the 4th resistance R4 is connected with the output of comparable chip U2, and second end of the 4th resistance R4 is connected with the positive input of comparable chip U2.
The first end of the 5th resistance R5 is connected with the positive input of comparable chip U2, and second end of the 5th resistance R5 is connected with the output of detection part.
The first end of the 6th resistance R6 is connected with the reverse input end of comparable chip U2, and second end of the 6th resistance R6 is connected with Voltage stabilizing module.
The first end of the 7th resistance R7 receives high level signal.
The first end of the 8th resistance R8 is connected with second end of the 5th resistance R5, and second end of the 8th resistance R8 is connected with second end of the 7th resistance R7.
Comparable chip U2 can be the comparator of IC358 for model, and can also be can the comparator of substitute I C358, preferably, in embodiments of the present invention, comparable chip U2 be chosen for the comparator that model is IC358.
As shown in Figure 2, the 4th resistance R4 is the feedback resistance of comparable chip U2, and the 5th resistance R5 is comparable chip U2 input resistance to the 8th resistance R8.
In the control circuit of Switching Power Supply provided by the invention, comparable chip U2, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and electric capacity C1 form a hysteresis comparator.
Wherein, hysteresis comparator has two voltage thresholds, i.e. upper threshold value and lower threshold values, corresponding first parameter threshold of lower threshold value X1, corresponding second parameter threshold of upper threshold value X2.The resistance value of thermistor (temperature) sensor changes with the variations in temperature of water in water dispenser, and when the resistance value of thermistor (temperature) sensor changes, the voltage of the positive input of comparable chip IC358 also can change.Wherein, thermistor (temperature) sensor is as shown in U3 in Fig. 2.
Suppose, when the resistance value of thermistor (temperature) sensor is reduced to the first parameter threshold by being greater than any time of the second parameter threshold, the voltage of the positive input in comparable chip U2 can reduce thereupon, and when being reduced to lower threshold value, the output of comparable chip U2 becomes high level from low level; Similarly, when the resistance value of thermistor (temperature) sensor is increased to the second parameter threshold by being less than any time of the first parameter threshold, the voltage of the positive input in comparable chip U2 can increase thereupon, and when increasing to upper threshold value, the output of comparable chip U2 becomes low level from high level.From above-mentioned analysis, the magnitude of voltage of the positive input of the temperature of the water in water dispenser, the resistance of thermistor (temperature) sensor and comparable chip U2 is proportional example change.
By regulating the size of the 4th resistance R4, the width of the threshold interval of threshold interval [the first parameter threshold, the second parameter threshold] can be changed.Suppose, when the resistance supposing the 4th resistance R4 is 330K Ω, threshold interval is [14,17], if when the resistance of the 4th resistance R4 increases to 1M Ω, threshold interval becomes [15,16].This shows, change the resistance of the 4th resistance, the width of threshold interval can be increased.
Similarly, by regulating the size of the 8th resistance R8, the span of threshold interval can be changed, when the resistance supposing the 8th resistance R8 is 2.2K Ω, threshold interval is [16,17], if when the resistance of the 8th resistance R8 is reduced to 1K Ω, threshold interval becomes [15,16].
It should be noted that, above-mentioned interval [14,17], [15,16] and [16,17] are the temperature range of threshold interval [the first parameter threshold, the second parameter threshold] correspondence.
Alternatively, as shown in Figure 2, the control circuit of Switching Power Supply provided by the invention also comprises the 14 resistance R14, the 16 resistance R16, electric capacity C2 and electric capacity C3, wherein, 14 resistance R14 is output current limiting resistance, the size of the magnitude of voltage of the output voltage of the 14 resistance R14 quantity determine switch power supply.
Carry out analysis by the control circuit provided the embodiment of the present invention known, even if the resistance of thermistor (temperature) sensor changes along with the change of the temperature of water in water dispenser, the target voltage values that also feedback element can not be caused to feed back to Switching Power Supply changes frequently.
If use thermistor (temperature) sensor in water dispenser, then the first parameter threshold and the second parameter threshold will two different resistances of corresponding thermistor respectively, its resistance is also corresponding different coolant-temperature gages that thermistor senses.Suppose that the temperature range that this threshold interval is corresponding is [10,12], when water dispenser cooling activation, in water dispenser, the temperature of water declines from normal temperature 25 DEG C, until when being reduced to 10 DEG C, water dispenser switches to keeping warm mode, the now temperature bottom out of water in water dispenser, when rise can switch back refrigeration mode again to when 12 DEG C.And can with 10 DEG C for threshold values in point type of the prior art feedback, when the temperature recovery of water in water dispenser is more than 10 DEG C, such as 10.1 DEG C time, will rebound refrigeration mode, cause water dispenser frequently to jump lamp switch mode at short notice.The point type that segmentation adjusted design in the embodiment of the present invention effectively prevent feedback turns off open-minded, and better can ensure the life-span, client also has better experience.
Alternatively, as shown in Figure 2, control circuit also comprises Voltage stabilizing module, wherein: Voltage stabilizing module, is connected with comparing unit, for providing stable voltage for comparing unit.
Further, Voltage stabilizing module comprises the second voltage stabilizing chip IC 2, the 9th resistance R9, the tenth resistance R10 and electric capacity C1, wherein:
The first end of the second voltage stabilizing chip IC 2 is connected with the first end of the 7th resistance, the second end ground connection of the second voltage stabilizing chip.
9th resistance R9 first end is connected with the first end of the second voltage stabilizing chip, and the second end of the 9th resistance is connected with the reference edge of the second voltage stabilizing chip.
Tenth resistance R10 first end is connected with the reference edge of the second voltage stabilizing chip, and the tenth resistance second end is connected with low level.
Electric capacity C1 first end is connected with the first end of the second voltage stabilizing chip, the second end ground connection of electric capacity.
Particularly, the second voltage stabilizing chip IC 2 can for controllable accurate source of stable pressure (model is: TL431), can also be other Voltage stabilizing module, and as preferably, in embodiments of the present invention, the second voltage stabilizing chip IC 1 is chosen for TL431.Known from foregoing description, because the output voltage of Switching Power Supply can change, therefore comparable chip U2 cannot obtain stable supply power voltage (VCC).Now the second voltage stabilizing chip IC 2 and the 9th resistance R9, the tenth resistance R10 form Voltage stabilizing module jointly, for comparable chip U2 chip provides stable VCC voltage (3V or 5V etc.).
The voltage of the reference edge of the second voltage stabilizing chip IC 2 is V
rEF2, by formula V2=V
rEF2* (1+R9/R10) calculates the magnitude of voltage that the second voltage stabilizing chip IC 2 exports, and wherein, V2 is this magnitude of voltage.As can be seen from formula, work as V
rEF2in changeless situation, regulation voltage level V2 can be realized by regulating the 9th resistance R9 and the tenth resistance R10.If the power supply that comparable chip U2 needs 5V stable, and V
rEF2=2.5V, then the resistance of R9 and R10 must be equal, could realize the power supply that 5V is stable.
Fig. 3 is the schematic diagram of the control circuit according to the optional Switching Power Supply of the another kind of the embodiment of the present invention, as shown in Figure 3, control circuit, except detection part 10, comparing unit 20 and feedback element 30, also comprises load 40, high frequency transformer 50 and switching power source chip 60.Wherein, as shown in Figure 3, detection part 10 is installed in load 40.
As can be seen from Figure 3, switching power source chip and high frequency transformer are inputted by fiery zero line, the DC low-voltage supply load of stable output, the detection part inductive load change of load by carrying, and the target component detected is provided to comparing unit, comparing unit is regulated by segmentation, output low level " 0 " or high level " 1 " are to feedback element, feedback element is by the adjustment of the first resistance, the second resistance and the 3rd resistance, change the target voltage values feeding back to switching power source chip, thus change the output voltage of Switching Power Supply.
According to the embodiment of the present invention, provide a kind of embodiment of the method for control method of Switching Power Supply, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 4 is the flow chart of the control method of a kind of Switching Power Supply according to the embodiment of the present invention, and as shown in Figure 4, the method comprises the steps that S102 is to step S108:
Step S102, the target component of the load of real-time sense switch power supply.
The equipment such as it should be noted that, load can be water dispenser and humidifier, all right water heater, in embodiments of the present invention, choosing load is water dispenser.When load is water dispenser, detection part is the parts detecting water dispenser temperature, and wherein, the parts of detected temperatures can be the parts of thermocouple sensor or thermistor (temperature) sensor composition, can also be the parts of digital temperature sensor composition.
Such as, when the temperature sensor chosen is thermistor (temperature) sensor, target component is the resistance value of this thermistor, wherein, when the variations in temperature of water in water dispenser, and the resistance value also proportional example change thereupon of this thermistor.
Step S104, the size of comparison object parameter and the first parameter threshold and the second parameter threshold, and export target level signal according to comparative result, wherein, the first parameter threshold is less than the second parameter threshold.
When target component is the resistance value of thermistor, the corresponding resistance value of the first parameter threshold, the second parameter threshold is a corresponding resistance value also, and resistance value corresponding to the first parameter threshold is greater than resistance value corresponding to the second parameter threshold.Wherein, first parameter threshold and the second parameter threshold form a threshold interval, this threshold interval is expressed as [the first parameter threshold, second parameter threshold], first parameter threshold is the minimum value of this threshold interval, second parameter threshold is the maximum of this threshold interval, and this threshold interval is adjustable.By target component and this threshold interval are compared, control to export corresponding target level signal according to comparative result.
It should be noted that, in embodiments of the present invention, target level signal comprises low level signal and high level signal, and wherein, high level signal represents with " 1 ", and low level signal represents with " 0 ".
Step S106, according to target level Signal Regulation target voltage values.
Step S108, feedback target magnitude of voltage is to the switching power source chip of Switching Power Supply.
In embodiments of the present invention, by detection part is detected that target component is sent to debugging unit, target component compares with the first parameter threshold and the second parameter threshold by debugging unit respectively, the output of self is controlled according to comparative result, and by this output feedack to feedback element, feedback element controls according to the output received the target voltage values feeding back to Switching Power Supply, relative to the pattern that prior art breaker in middle power supply is point type feedback, Switching Power Supply break-make back and forth can be made, affect the life-span of Switching Power Supply, reach Switching Power Supply and feed back from point type the object becoming segmentation and feed back, and then solve in prior art because point type controls to make Switching Power Supply frequently be energized the technical problem causing Switching Power Supply performance to reduce.
Alternatively, step S104 exports target level signal according to comparative result and comprises the steps that S1041 is to step S1043:
Step S1041, when comparative result be target component from being greater than the first parameter threshold until be reduced to the first parameter threshold when, control comparing unit export target level signal be high level signal.
Step S1043, when comparative result be target component from being less than the second parameter threshold until be increased to the second parameter threshold when, control comparing unit export target level signal be low level signal.
Particularly, if water dispenser enters refrigeration mode, in water dispenser, the temperature of water declines gradually, then the resistance of thermistor (temperature) sensor also declines gradually, and in the process that thermistor declines, in comparing unit, the magnitude of voltage of positive input also declines thereupon gradually.When the resistance of thermistor drops to the first parameter threshold, the magnitude of voltage of positive input drops to lower threshold value, and the now output of comparing unit becomes high level from low level, and the mode of operation switching water dispenser is holding mode.From the moment switching to holding mode, in water dispenser, the temperature of water rises gradually, the resistance of thermistor (temperature) sensor also rises thereupon, when rising to the second parameter threshold, the magnitude of voltage of positive input rises to upper threshold value, the output of comparing unit becomes low level from high level, and the mode of operation switching water dispenser is refrigeration mode.Wherein, if the temperature of water changes in water dispenser, then the resistance of thermistor (temperature) sensor and the magnitude of voltage of comparing unit positive input also change thereupon.
Alternatively, according to target level Signal Regulation target voltage values, step S106 comprises the steps that S1061 is to step S1063:
Step S1061, when comparing unit exports high level signal, controls triode ON, wherein, when triode ON, the second resistive short of control circuit, the loop of the feedback element of the first resistance of control circuit and the 3rd resistance access control circuit of control circuit.
Step S1063, when comparable chip output low level signal, controls triode and turns off, wherein, when triode turns off, and the second resistance, the loop of the first resistance and the 3rd resistance access feedback element.
Particularly, when target level signal is switched to high level by low level, triode is in conducting state, due to conducting, the second resistance is by short circuit.Therefore only the first resistance and the 3rd resistance access the loop of feedback element.When target level signal is switched to low level by high level, triode is in off state, due to shutoff, the second resistance, the first resistance and the 3rd resistance all access the loop of feedback element.When triode is in conducting state, feedback element feeds back to the target voltage values of switching power source chip, and when being in off state with triode, the target voltage values that feedback element feeds back to switching power source chip is unequal magnitude of voltage.Known by above-mentioned analysis, control triode ON and shutoff according to target level signal, just the adjustable size feeding back to the target voltage values of switching power source chip.
Alternatively, control method also comprises the steps that S1 is to step S3:
Step S1, when the resistance of the 4th resistance reduces, the difference between the first parameter threshold and the second parameter threshold increases.
Step S3, when the resistance of the 4th resistance increases, the difference between the first parameter threshold and the second parameter threshold reduces.
By regulating the size of the 4th resistance, threshold interval [the first parameter threshold can be changed, second parameter threshold] the width of threshold interval, such as, when the resistance supposing the 4th resistance is 330K Ω, threshold interval is [14,17], if when the resistance of the 4th resistance is increased to 1M Ω, threshold interval becomes [15,16].This shows, change the resistance of the 4th resistance, the width of threshold interval can be increased.Alternatively, control method also comprises the steps that S5 is to step S7:
Step S5, when the resistance of the 8th resistance increases, the first parameter threshold and the second parameter threshold all increase, and difference between the first parameter threshold and the second parameter threshold is constant.
Step S7, when the resistance of the 8th resistance reduces, the first parameter threshold and the second parameter threshold all reduce, and difference between the first parameter threshold and the second parameter threshold is constant.
Particularly, by regulating the size of the 8th resistance, the span of threshold interval can be changed, when the resistance supposing the 8th resistance is 2.2K Ω, threshold interval is [16,17], if when the resistance of the 8th resistance is reduced to 1K Ω, threshold interval becomes [15,16].
The embodiment of the present invention additionally provides a kind of household electrical appliance.These household electrical appliance comprise the control circuit of any one Switching Power Supply that foregoing of the present invention provides.In embodiments of the present invention, household electrical appliance can be water dispensers, also can be humidifiers, can also be water heaters.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. a control circuit for Switching Power Supply, is characterized in that, comprising:
Detection part, described detection part is connected with the load of described Switching Power Supply, for detecting the target component of described load;
Comparing unit, is connected with described detection part, and for the size of more described target component and the first parameter threshold and the second parameter threshold, and export target level signal according to comparative result, wherein, described first parameter threshold is less than described second parameter threshold; And
Feedback element, is connected with described comparing unit, for according to described target level Signal Regulation target voltage values, and feeds back the switching power source chip of described target voltage values to described Switching Power Supply.
2. control circuit according to claim 1, is characterized in that, described feedback element comprises:
First voltage stabilizing chip, the first end of described first voltage stabilizing chip is connected with described switching power source chip, the second end ground connection of described first voltage stabilizing chip, and described first voltage stabilizing chip is used for providing stable voltage to described Switching Power Supply;
Triode, the base stage of described triode is connected with the output of described comparing unit, the grounded emitter of described triode;
First resistance, the first end ground connection of described first resistance, the second end of described first resistance is connected with the emitter of described triode;
Second resistance, the first end of described second resistance is connected with the reference edge of described first voltage stabilizing chip, and the second end of described second resistance is connected with the collector electrode of described triode; And
3rd resistance, the first end of described 3rd resistance is connected with the second end of described second resistance, and the second termination of described 3rd resistance receives high level signal.
3. control circuit according to claim 2, is characterized in that, described control circuit also comprises:
Voltage stabilizing module, is connected with described comparing unit, for providing stable voltage for described comparing unit.
4. control circuit according to claim 3, is characterized in that, described comparing unit comprises:
Comparable chip, the output of described comparable chip is connected with the base stage of described triode;
4th resistance, the first end of described 4th resistance is connected with the output of described comparable chip, and the second end of described 4th resistance is connected with the positive input of described comparable chip;
5th resistance, the first end of described 5th resistance is connected with the positive input of described comparable chip, and the second end of described 5th resistance is connected with the output of described detection part;
6th resistance, the first end of described 6th resistance is connected with the reverse input end of described comparable chip, and the second end of described 6th resistance is connected with described Voltage stabilizing module;
7th resistance, the first end of described 7th resistance receives high level signal; And
8th resistance, the first end of described 8th resistance is connected with the second end of described 5th resistance, and the second end of described 8th resistance is connected with the second end of described 7th resistance.
5. control circuit according to claim 4, is characterized in that, described Voltage stabilizing module comprises:
Second voltage stabilizing chip, the first end of described second voltage stabilizing chip is connected with the first end of described 7th resistance, the second end ground connection of described second voltage stabilizing chip;
9th resistance, the first end of described 9th resistance is connected with the first end of described second voltage stabilizing chip, and the second end of described 9th resistance is connected with the reference edge of described second voltage stabilizing chip;
Tenth resistance, the first end of described tenth resistance is connected with the reference edge of described second voltage stabilizing chip, and described tenth resistance second end is connected with low level; And
Electric capacity, the first end of described electric capacity is connected with the first end of described second voltage stabilizing chip, the second end ground connection of described electric capacity.
6. a control method for Switching Power Supply, is characterized in that, carried out the control of Switching Power Supply by the control circuit of the Switching Power Supply according to any one of claim 1 to 5, described control method comprises:
The target component of the load of the described Switching Power Supply of real-time detection;
The size of more described target component and the first parameter threshold and the second parameter threshold, and export target level signal according to comparative result, wherein, described first parameter threshold is less than described second parameter threshold;
According to described target level Signal Regulation target voltage values; And
Feed back the switching power source chip of described target voltage values to described Switching Power Supply.
7. control method according to claim 6, is characterized in that, exports target level signal comprise according to comparative result:
When described comparative result be described target component from being greater than described first parameter threshold until be reduced to described first parameter threshold when, control described control circuit comparing unit export described target level signal be high level signal; And
When described comparative result be described target component from being less than described second parameter threshold until be increased to described second parameter threshold when, control described comparing unit export described target level signal be low level signal.
8. control method according to claim 7, is characterized in that, comprises according to described target level Signal Regulation target voltage values:
When described comparing unit exports described high level signal, control the triode ON of described control circuit, wherein, when described triode ON, second resistive short of described control circuit, the first resistance of described control circuit and the 3rd resistance of described control circuit access the loop of the feedback element of described control circuit; And
When the comparable chip of described control circuit exports described low level signal, control described triode and turn off, wherein, when described triode turns off, described second resistance, described first resistance and described 3rd resistance access the loop of described feedback element.
9. control method according to claim 8, is characterized in that, described control method also comprises:
When the resistance of the 4th resistance of described control circuit reduces, the difference between described first parameter threshold and described second parameter threshold increases; Or
When the resistance of described 4th resistance increases, the difference between described first parameter threshold and described second parameter threshold reduces.
10. control method according to claim 6, is characterized in that, described control method also comprises:
When the resistance of the 8th resistance of described control circuit increases, described first parameter threshold and described second parameter threshold all increase, and difference between described first parameter threshold and described second parameter threshold is constant; Or
When the resistance of described 8th resistance reduces, described first parameter threshold and described second parameter threshold all reduce, and difference between described first parameter threshold and described second parameter threshold is constant.
11. 1 kinds of household electrical appliance, is characterized in that, comprise the control circuit of Switching Power Supply according to any one of claim 1 to 5.
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| CN201510701658.XA CN105375785A (en) | 2015-10-22 | 2015-10-22 | Household electric appliance and switching power supply control circuit and method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106406385A (en) * | 2016-08-25 | 2017-02-15 | 珠海格力电器股份有限公司 | Switching power supply, feedback control circuit and method thereof and water dispenser |
| CN108683331A (en) * | 2018-05-03 | 2018-10-19 | 郑州云海信息技术有限公司 | A kind of regulating system and method for server switch power source output voltage |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201001028Y (en) * | 2006-09-29 | 2008-01-02 | Bcd半导体制造有限公司 | Single chip type switch power source and overtemperature protective circuit thereof |
| CN201656433U (en) * | 2010-02-05 | 2010-11-24 | 国基电子（上海）有限公司 | Overheat protection circuit and electronic equipment using overheat protection circuit |
| CN201742381U (en) * | 2010-08-25 | 2011-02-09 | 王雁尘 | TL431 upper temperature limit alternating current switching circuit |
| CN201917839U (en) * | 2010-12-08 | 2011-08-03 | 四川长虹电器股份有限公司 | Automatic maintaining voltage adjusting circuit for PDP (Plasma Display Panel) display screen |
| CN102437555A (en) * | 2011-12-15 | 2012-05-02 | 南京亚派科技实业有限公司 | Over-temperature protection circuit for insulated gate bipolar transistor (IGBT) |
| JP2013228518A (en) * | 2012-04-25 | 2013-11-07 | Kyocera Corp | Liquid crystal display device |
| CN203604230U (en) * | 2013-08-10 | 2014-05-21 | 阳光电源股份有限公司 | Control circuit for fan |
| CN104023445A (en) * | 2014-06-12 | 2014-09-03 | 电子科技大学 | LED driving circuit |
| CN203907905U (en) * | 2014-05-30 | 2014-10-29 | 河海大学常州校区 | Vehicle-mounted solar refrigeration system capable of being remotely controlled |
| CN204349432U (en) * | 2014-12-17 | 2015-05-20 | 广州金升阳科技有限公司 | A kind of Switching Power Supply thermal-shutdown circuit |
| CN104993454A (en) * | 2015-06-29 | 2015-10-21 | 中国电子科技集团公司第五十八研究所 | Over-temperature protection circuit |
| CN105141112A (en) * | 2015-10-15 | 2015-12-09 | 珠海格力电器股份有限公司 | Phased feedback adjustment switching power supply |
-
2015
- 2015-10-22 CN CN201510701658.XA patent/CN105375785A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201001028Y (en) * | 2006-09-29 | 2008-01-02 | Bcd半导体制造有限公司 | Single chip type switch power source and overtemperature protective circuit thereof |
| CN201656433U (en) * | 2010-02-05 | 2010-11-24 | 国基电子（上海）有限公司 | Overheat protection circuit and electronic equipment using overheat protection circuit |
| CN201742381U (en) * | 2010-08-25 | 2011-02-09 | 王雁尘 | TL431 upper temperature limit alternating current switching circuit |
| CN201917839U (en) * | 2010-12-08 | 2011-08-03 | 四川长虹电器股份有限公司 | Automatic maintaining voltage adjusting circuit for PDP (Plasma Display Panel) display screen |
| CN102437555A (en) * | 2011-12-15 | 2012-05-02 | 南京亚派科技实业有限公司 | Over-temperature protection circuit for insulated gate bipolar transistor (IGBT) |
| JP2013228518A (en) * | 2012-04-25 | 2013-11-07 | Kyocera Corp | Liquid crystal display device |
| CN203604230U (en) * | 2013-08-10 | 2014-05-21 | 阳光电源股份有限公司 | Control circuit for fan |
| CN203907905U (en) * | 2014-05-30 | 2014-10-29 | 河海大学常州校区 | Vehicle-mounted solar refrigeration system capable of being remotely controlled |
| CN104023445A (en) * | 2014-06-12 | 2014-09-03 | 电子科技大学 | LED driving circuit |
| CN204349432U (en) * | 2014-12-17 | 2015-05-20 | 广州金升阳科技有限公司 | A kind of Switching Power Supply thermal-shutdown circuit |
| CN104993454A (en) * | 2015-06-29 | 2015-10-21 | 中国电子科技集团公司第五十八研究所 | Over-temperature protection circuit |
| CN105141112A (en) * | 2015-10-15 | 2015-12-09 | 珠海格力电器股份有限公司 | Phased feedback adjustment switching power supply |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106406385A (en) * | 2016-08-25 | 2017-02-15 | 珠海格力电器股份有限公司 | Switching power supply, feedback control circuit and method thereof and water dispenser |
| CN106406385B (en) * | 2016-08-25 | 2019-01-29 | 珠海格力电器股份有限公司 | A kind of feedback control circuit of Switching Power Supply, method, Switching Power Supply and water dispenser |
| CN108683331A (en) * | 2018-05-03 | 2018-10-19 | 郑州云海信息技术有限公司 | A kind of regulating system and method for server switch power source output voltage |
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Application publication date: 20160302 |