CN106406385A - Switching power supply, feedback control circuit and method thereof and water dispenser - Google Patents
Switching power supply, feedback control circuit and method thereof and water dispenser Download PDFInfo
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- CN106406385A CN106406385A CN201610728278.XA CN201610728278A CN106406385A CN 106406385 A CN106406385 A CN 106406385A CN 201610728278 A CN201610728278 A CN 201610728278A CN 106406385 A CN106406385 A CN 106406385A
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- 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
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Abstract
The invention provides a switching power supply, a feedback control circuit and method thereof and a water dispenser. The circuit comprises a temperature bulb and a first voltage control unit; the resistance of the temperature bulb changes with the ambient temperature; and the first voltage control unit adjusts output of a first voltage, namely the load power supply, according to temperature change. Output of the first voltage is adjusted according to temperature change by keeping the first voltage in a first threshold voltage value when the temperature is lower than a first temperature, and the first threshold voltage value does not cause further decrease of the ambient temperature. According to schemes provided by the invention, when the detected temperature is lower than a specific value, output to the load power of the switching power supply does not cause further decrease of the temperature, it is ensured that the system has stable performance, and energy consumption is reduced.
Description
Technical field
The present invention relates to the feedback control circuit of Switching Power Supply, more particularly, to Switching Power Supply, method, Switching Power Supply and drinking-water
Machine.
Background technology
In prior art, Switching Power Supply is mostly fixing or segmentation output voltage pattern.Traditional Switching Power Supply is used for existing
When having in the electrical equipment have refrigerating function, such as when being applied to water dispenser, when environment temperature is very low, Switching Power Supply is supplied to negative
The power output carrying still results in constant temperature and declines, and leads to the water freezing in electrical equipment the most at last, occurs ice to block up phenomenon.
If completely cutting through power after refrigeration terminates, so that cooling assembly is quit work, then water temperature can be led to go up rapidly,
The very short time will recover to freeze again, and final result will lead to overall power to rise, and efficiency grade difficult to reach regulation will
Ask.
Content of the invention
Present invention is primarily targeted at overcoming the defect of above-mentioned prior art, the feedback control electricity of the Switching Power Supply of proposition
Road, method, Switching Power Supply and water dispenser.
One aspect of the present invention provides a kind of feedback control circuit of Switching Power Supply, controls including temperature-sensitive bag and first voltage
Unit, described temperature-sensitive bag, according to the change of environment temperature, the resistance of described temperature-sensitive bag changes；Described first voltage controls
Unit, the change according to described temperature adjusts the output of first voltage, and described first voltage is load supplying；Described according to temperature
Change adjust first voltage output be specially：When described temperature is less than the first temperature, first voltage is maintained at the first threshold
Threshold voltage value, described first threshold voltage value is not result in that environment temperature continues to reduce.
Alternatively, when described temperature is more than second temperature, first voltage is maintained at second threshold voltage value, and described second
Threshold voltage is more than described first threshold voltage；And/or when described temperature changes between described first temperature and second temperature
When, described first voltage changes between first threshold voltage value and described second threshold voltage value.
Alternatively, described Switching Power Supply includes first voltage output end, and described first voltage control unit includes comparator,
Described temperature-sensitive bag is connected with the input of described comparator, and the voltage signal of the output of described comparator controls as feedback signal
The output of first voltage.
Alternatively, described first voltage output end is the voltage process of the first winding voltage output end output of Switching Power Supply
Rectification and/or filtered voltage output port.
Alternatively, described Switching Power Supply includes the second winding voltage output end, and described control circuit also includes voltage regulation unit,
The voltage of described second winding voltage output end output is that described comparator is powered after voltage regulation unit.
Alternatively, described voltage regulation unit includes Zener diode and/or voltage-stablizer.
Alternatively, described temperature-sensitive bag and first resistor to input comparator after the supply voltage partial pressure of described comparator the
One input port, second resistance second input to input comparator after the supply voltage partial pressure of described comparator with 3rd resistor
Port, the 4th resistance is connected across between the second input port of comparator and output port.
Alternatively, described temperature-sensitive bag is negative temperature coefficient temperature-sensitive bag.
Another aspect of the invention provides a kind of Switching Power Supply, including aforementioned arbitrary described feedback control circuit.
Further aspect of the present invention provides a kind of water dispenser, including foregoing Switching Power Supply.
Further aspect of the present invention provides a kind of feedback of Switching Power Supply, including：Setting temperature-sensitive bag, according to ring
The change of border temperature, the resistance of described temperature-sensitive bag changes；Change according to described temperature adjusts the output of first voltage, institute
Stating first voltage is load supplying；The output that the described change according to temperature adjusts first voltage is specially：When described temperature is little
When the first temperature, first voltage is maintained at first threshold voltage value, and described first threshold voltage value is not result in environment temperature
Continue to reduce.
Alternatively, when described temperature is more than second temperature, first voltage is maintained at second threshold voltage value, and described second
Threshold voltage is more than described first threshold voltage；And/or when described temperature changes between described first temperature and second temperature
When, described first voltage changes between first threshold voltage value and described second threshold voltage value.
Alternatively, described Switching Power Supply includes first voltage output end, arranges comparator, and described temperature-sensitive bag is compared with described
The input of device is connected, and the voltage signal of the output of described comparator controls the output of first voltage as feedback signal.
Alternatively, described first voltage output end is the voltage process of the first winding voltage output end output of Switching Power Supply
Rectification and/or filtered voltage output port.
Alternatively, described Switching Power Supply includes the second winding voltage output end, arranges voltage regulation unit, described second winding electricity
The voltage of pressure output end output is that described comparator is powered after described voltage regulation unit.
Alternatively, described voltage regulation unit includes Zener diode and/or voltage-stablizer.
Alternatively, described temperature-sensitive bag and first resistor to input comparator after the supply voltage partial pressure of described comparator the
One input port, second resistance second input to input comparator after the supply voltage partial pressure of described comparator with 3rd resistor
Port, the 4th resistance is connected across between the second input port of comparator and output port.
Alternatively, described temperature-sensitive bag is negative temperature coefficient temperature-sensitive bag.
The solution of the present invention, enables to when the temperature detecting is less than particular value, Switching Power Supply exports to bearing power
It is not result in that temperature declines further, to ensure that system has stable performance, and saving energy consumption.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the embodiment of the feedback control circuit of Switching Power Supply that the present invention provides；
Fig. 2 is the structural representation of the another embodiment of the feedback control circuit of Switching Power Supply that the present invention provides；
Fig. 3 is the circuit diagram of the embodiment of the feedback control circuit of Switching Power Supply that the present invention provides；
Fig. 4 is the structural representation of the embodiment of Switching Power Supply that the present invention provides；
Fig. 5 is the method schematic diagram of the embodiment of the feedback of Switching Power Supply that the present invention provides.
Specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Corresponding accompanying drawing is clearly and completely described to technical solution of the present invention.Obviously, described embodiment is only the present invention one
Section Example, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The every other embodiment being obtained under the premise of going out creative work, broadly falls into the scope of protection of the invention.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that such use
Data can exchange in the appropriate case so that embodiments of the invention described herein can with except here diagram or
Order beyond those of description is implemented.Additionally, term " comprising " and " having " and their any deformation are it is intended that cover
Cover non-exclusive comprising, for example, contain series of steps or process, method, system, product or the equipment of unit are not necessarily limited to
Those steps clearly listed or unit, but may include clearly not listing or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
Fig. 1 is the structural representation of the embodiment of the feedback control circuit of Switching Power Supply that the present invention provides.
The embodiment of the invention, as shown in Figure 1.The feedback control circuit 10 of Switching Power Supply, including temperature-sensitive bag 101
With first voltage control unit 103.
Temperature-sensitive bag, according to the change of environment temperature, the resistance of described temperature-sensitive bag changes.
For example, temperature-sensitive bag can be positive temperature coefficient temperature-sensitive bag PTC or negative temperature coefficient temperature-sensitive bag NTC.With negative
As a example temperature coefficient temperature-sensitive bag NTC, when temperature is low, the resistance of temperature-sensitive bag is higher, with the rising of temperature, the electricity of temperature-sensitive bag
Resistance resistance reduces.
First voltage control unit, the change according to described temperature adjusts the output of first voltage, and described first voltage is
Load supplying.
Load, the e.g. warm up/down part of water dispenser.The resistance variation with temperature of temperature-sensitive bag and change, therefore
The output of first voltage can be controlled according to the change of resistance, be in certain pass with the first voltage realizing exporting with temperature change
System.
When temperature is less than the first temperature, such as T1, first voltage is locked in first threshold voltage value, such as V1min.When
When first threshold voltage value is not more than a reference value, it is not result in that environment temperature continues to reduce.For example, in the application of water dispenser
In, reference value is 7 watts, and when first threshold voltage is not more than 7 watt-hours, the first voltage of output will not result in water temperature and goes up further
Rise.
Alternatively, when described temperature is more than second temperature, such as T2, first voltage is maintained at second threshold voltage value
V1max, described second threshold voltage is more than described first threshold voltage.For example, second threshold voltage can be the specified of load
Power, when temperature is further up, first voltage no longer increases, but is locked at second threshold voltage it is ensured that system
Stablize and safety.
When described temperature changes between described first temperature and second temperature, described first voltage is in first threshold electricity
Change between pressure value and described second threshold voltage value.For example, when temperature is in the range of [T1, T2], first voltage exists
Change in the range of [V1min, V1max].
Fig. 2 is the structural representation of the another embodiment of the feedback control circuit of Switching Power Supply that the present invention provides.
The specific embodiment party of the present invention is, in conjunction with the various aspects of other embodiment of the present invention.The feedback of Switching Power Supply
Control circuit 20, including temperature-sensitive bag 201 and first voltage control unit 203.Wherein first voltage control unit includes comparator
2031.
Temperature-sensitive bag, according to the change of environment temperature, the resistance of described temperature-sensitive bag changes.
For example, temperature-sensitive bag can be positive temperature coefficient temperature-sensitive bag PTC or negative temperature coefficient temperature-sensitive bag NTC.With negative
As a example temperature coefficient temperature-sensitive bag NTC, when temperature is low, the resistance of temperature-sensitive bag is higher, with the rising of temperature, the electricity of temperature-sensitive bag
Resistance resistance reduces.
First voltage control unit, the change according to described temperature adjusts the output of first voltage, and described first voltage is
Load supplying.
Load, the e.g. warm up/down part of water dispenser.The resistance variation with temperature of temperature-sensitive bag and change, therefore
The output of first voltage can be controlled according to the change of resistance, be in certain pass with the first voltage realizing exporting with temperature change
System.
When temperature is less than the first temperature, such as T1, first voltage is locked in first threshold voltage value, such as V1min.When
When first threshold voltage value is not more than a reference value, it is not result in that environment temperature continues to reduce.For example, in the application of water dispenser
In, reference value is 7 watts, and when first threshold voltage is not more than 7 watt-hours, the first voltage of output will not result in water temperature and goes up further
Rise.
Alternatively, when described temperature is more than second temperature, such as T2, first voltage is maintained at second threshold voltage value
V1max, described second threshold voltage is more than described first threshold voltage.For example, second threshold voltage can be the specified of load
Power, when temperature is further up, first voltage no longer increases, but is locked at second threshold voltage it is ensured that system
Stablize and safety.
When described temperature changes between described first temperature and second temperature, described first voltage is in first threshold electricity
Change between pressure value and described second threshold voltage value.For example, when temperature is in the range of [T1, T2], first voltage exists
Change in the range of [V1min, V1max]
In the present embodiment, Switching Power Supply includes first voltage output end, for exporting first voltage.First voltage control
Unit processed includes comparator, and temperature-sensitive bag is connected with the input of comparator, and the voltage signal of the output of comparator is as feedback letter
Number control first voltage output.
Alternatively, first voltage output end is the voltage of the first winding voltage output end output of Switching Power Supply through over commutation
Voltage output port after (such as commutation diode) and/or filtering (such as filter capacitor).
In yet, described Switching Power Supply includes the second winding voltage output end, and described control circuit is also wrapped
Include voltage regulation unit, the voltage of described second winding voltage output end output is that described comparator is powered after voltage regulation unit.Example
As the power supply of comparator needs the fixed voltage VCC of 5V, then the second winding voltage, after voltage stabilizing, forms fixing 5V voltage.
Alternatively voltage regulation unit includes Zener diode and/or voltage-stablizer.
Alternatively, the first of input comparator defeated after the temperature-sensitive bag and first resistor supply voltage partial pressure to described comparator
Inbound port, second resistance and the second input to input comparator after the supply voltage partial pressure of described comparator for the 3rd resistor
Mouthful, the 4th resistance is connected across between the second input port of comparator and output port.Therefore, it can according to practical application not
With it is determined that needing the minimum temperature (the first temperature) controlling, select suitable temperature-sensitive bag, different temperature-sensitive bag resistance and temperature
Variation relation different, and according to determining the magnitude of voltage of first threshold voltage value and the second threshold, can determine first resistor, second
Resistance, 3rd resistor, the value of the 4th resistance.
Fig. 3 is the circuit diagram of the embodiment of the feedback control circuit of Switching Power Supply that the present invention provides.The present invention one has
Body embodiment, in conjunction with the various aspects of other embodiment of the present invention.T1 is the high frequency transformer of Switching Power Supply.D1, D2 are
Secondary Schottky barrier diodes, are that the secondary output of power supply carries out secondary side filtering, C1, C2, C3 are electrolytic capacitor filter.D3 is
Zener diode, is limited to the input voltage vin of U3 7805 Voltage stabilizing module offer, and Q1 is NPN type triode, and R1 is D3 and Q1
Current limliting divider resistance.
U4 is optocoupler, as the main devices of isolated from power and transmission feedback signal.U2TL431 Voltage stabilizing module, C4, R10
Constitute RC circuit, be that circuit compensates.R2, R3, R4 are 1% high accuracy divider resistance.R5 is 1% precision output current limiting electricity
Resistance, R6 is 1% precision feedback resistance, and U1 is 358 comparators, and R7, R8, R9 are the divider resistances of 358 chip inputs.NTC1 is
Connect the interface of negative temperature coefficient temperature-sensitive bag.
If, in [T1, T2] ＆ [T2 ,+∞] operated within range, T1, T2 temperature range o'clock is by 358 comparators for NTC temperature-sensitive bag
Divider resistance R6, R7, R8, R9, NTC1 determine, when temperature is more than T2,358 comparators will export low level (such as 1.5V),
Now according to its divider resistance R3, R4 will produce feedback signal, makes Switching Power Supply export stable V1max (example 431 Voltage stabilizing modules
As 12V) operating voltage.
When temperature is less than T1 (such as 3 degrees Celsius), already below regulation working range, but in order to prevent maloperation, will
U1 358 chip is made to export 3.5V, the stable output V1min (such as 4V) of Switching Power Supply output is not it is ensured that water temperature continues to drop
Low.
When temperature is less than T2, during more than T1, with the change of NTC1 temperature-sensitive bag resistance, 358 comparators are by exporting change
High level voltage, such as its excursion are V358=1.5～3.5V, and now the output voltage of 358 comparators is according to temperature-sensitive bag
The change of detected resistance and change, instant 431 Voltage stabilizing modules produce feedback signal also by the change according to 358 output voltages
Change, the change of feedback, by the output voltage of impact Switching Power Supply, makes the first winding output voltage V1 and second winding of power supply
Output voltage V2 produces and changes.When T changes between [T1, T2], V1 will change between [V1min, V1max], and V2 will be
Change between [V2min, V2max].V1 is supplied with the output voltage loading, and V1max will make load output rated maximum power, system
Cold efficiency highest.V1min will make load be in low-power keeping warm mode, and this power will not make water temperature continue to reduce.V2 is through steady
After pressure, export stable 5V VCC.
Fig. 4 is the structural representation of the embodiment of Switching Power Supply that the present invention provides.The embodiment of the invention,
Various aspects in conjunction with other embodiment of the present invention.A kind of Switching Power Supply is it is characterised in that include as each enforcement of the present invention
The feedback control circuit that mode provides.
The embodiment of the invention, in conjunction with the various aspects of other embodiment of the present invention.A kind of water dispenser, including
The Switching Power Supply providing as each embodiment of the present invention.
Fig. 5 is the method schematic diagram of the embodiment of the feedback of Switching Power Supply that the present invention provides.The present invention
One specific embodiment, in conjunction with the various aspects of other embodiment of the present invention.As shown in figure 5, a kind of feedback of Switching Power Supply
Control method, including step S410 and step S430.
Step S410, arranges temperature-sensitive bag, according to the change of environment temperature, the resistance of described temperature-sensitive bag changes.
For example, temperature-sensitive bag can be positive temperature coefficient temperature-sensitive bag PTC or negative temperature coefficient temperature-sensitive bag NTC.With negative
As a example temperature coefficient temperature-sensitive bag NTC, when temperature is low, the resistance of temperature-sensitive bag is higher, with the rising of temperature, the electricity of temperature-sensitive bag
Resistance resistance reduces.
Change according to described temperature adjusts the output of first voltage, and described first voltage is load supplying.
Load, the e.g. warm up/down part of water dispenser.The resistance variation with temperature of temperature-sensitive bag and change, therefore
The output of first voltage can be controlled according to the change of resistance, be in certain pass with the first voltage realizing exporting with temperature change
System.
When temperature is less than the first temperature, such as T1, first voltage is locked in first threshold voltage value, such as V1min.When
When first threshold voltage value is not more than a reference value, it is not result in that environment temperature continues to reduce.For example, in the application of water dispenser
In, reference value is 7 watts, and when first threshold voltage is not more than 7 watt-hours, the first voltage of output will not result in water temperature and goes up further
Rise.
Alternatively, when described temperature is more than second temperature, such as T2, first voltage is maintained at second threshold voltage value
V1max, described second threshold voltage is more than described first threshold voltage.For example, second threshold voltage can be the specified of load
Power, when temperature is further up, first voltage no longer increases, but is locked at second threshold voltage it is ensured that system
Stablize and safety.
When described temperature changes between described first temperature and second temperature, described first voltage is in first threshold electricity
Change between pressure value and described second threshold voltage value.For example, when temperature is in the range of [T1, T2], first voltage exists
Change in the range of [V1min, V1max].
Alternatively, Switching Power Supply includes first voltage output end, for exporting first voltage.First voltage control unit bag
Include comparator, temperature-sensitive bag is connected with the input of comparator, the voltage signal of the output of comparator controls the as feedback signal
The output of one voltage.
Alternatively, first voltage output end is the voltage of the first winding voltage output end output of Switching Power Supply through over commutation
Voltage output port after (such as commutation diode) and/or filtering (such as filter capacitor).
In yet, described Switching Power Supply includes the second winding voltage output end, and described control circuit is also wrapped
Include voltage regulation unit, the voltage of described second winding voltage output end output is that described comparator is powered after voltage regulation unit.Example
As the power supply of comparator needs the fixed voltage VCC of 5V, then the second winding voltage, after voltage stabilizing, forms fixing 5V voltage.
Alternatively voltage regulation unit includes Zener diode and/or voltage-stablizer.
Alternatively, the first of input comparator defeated after the temperature-sensitive bag and first resistor supply voltage partial pressure to described comparator
Inbound port, second resistance and the second input to input comparator after the supply voltage partial pressure of described comparator for the 3rd resistor
Mouthful, the 4th resistance is connected across between the second input port of comparator and output port.Therefore, it can according to practical application not
With it is determined that needing the minimum temperature (the first temperature) controlling, select suitable temperature-sensitive bag, different temperature-sensitive bag resistance and temperature
Variation relation different, and according to determining the magnitude of voltage of first threshold voltage value and the second threshold, can determine first resistor, second
Resistance, 3rd resistor, the value of the 4th resistance.
Thus, using the solution of the present invention, enable to when detect temperature be less than particular value when, Switching Power Supply export to
Bearing power is not result in that temperature declines further, to ensure that system has stable performance, and saving energy consumption.
Function described herein can be implemented in hardware, the software by computing device, firmware or its any combinations.
If implemented in the software by computing device, then function can be stored in computer as one or more instructions or code
Transmitted on readable media or via computer-readable media.Other examples and embodiment will in the present invention and appended right
Ask in scope and the spirit of book.For example, owing to the property of software, function described above can use by processor,
Hardware, the software of firmware, hardwired or the combination execution appointing whichever in these are implemented.Additionally, each functional unit can be integrated
In a processing unit or unit is individually physically present it is also possible to two or more units are integrated in
In one unit.
It should be understood that disclosed technology contents in several embodiments provided herein, can pass through other
Mode is realized.Wherein, circuit embodiments described above are only the schematically division of for example described unit, Ke Yiwei
A kind of division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not execute.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of unit or module or communication link
Connect, can be electrical or other form.
The described unit illustrating as separating component can be or may not be physically separate, electric as controlling
The part on road can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.The purpose to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs.
If described integrated unit is realized and as independent production marketing or use using in the form of SFU software functional unit
When, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part in other words prior art being contributed or all or part of this technical scheme can be in the form of software products
Embody, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, server or network equipment etc.) execution each embodiment methods described of the present invention whole or
Part steps.And aforesaid storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can be with store program codes
Medium.
The foregoing is only embodiments of the invention, be not limited to the present invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within scope of the presently claimed invention.
Claims (18)
1. a kind of feedback control circuit of Switching Power Supply is it is characterised in that include temperature-sensitive bag and first voltage control unit,
Described temperature-sensitive bag, according to the change of environment temperature, the resistance of described temperature-sensitive bag changes；
Described first voltage control unit, the change according to described temperature adjusts the output of first voltage, and described first voltage is
Load supplying；
The output that the described change according to temperature adjusts first voltage is specially：When described temperature is less than the first temperature, first
Voltage is maintained at first threshold voltage value, and described first threshold voltage value is not result in that environment temperature continues to reduce.
2. circuit according to claim 1 is it is characterised in that when described temperature is more than second temperature, first voltage is protected
Hold in second threshold voltage value, described second threshold voltage is more than described first threshold voltage；
And/or when described temperature changes between described first temperature and second temperature, described first voltage is in first threshold
Change between magnitude of voltage and described second threshold voltage value.
3. circuit according to claim 1 and 2 is it is characterised in that described Switching Power Supply includes first voltage output end, institute
State first voltage control unit and include comparator, described temperature-sensitive bag is connected with the input of described comparator, described comparator
The voltage signal of output controls the output of first voltage as feedback signal.
4. circuit according to claim 3 it is characterised in that described first voltage output end be Switching Power Supply first around
The voltage of group voltage output end output is through over commutation and/or filtered voltage output port.
5. the circuit according to claim 3 or 4 is it is characterised in that described Switching Power Supply includes the second winding voltage output
End, described control circuit also includes voltage regulation unit, and the voltage of described second winding voltage output end output is after voltage regulation unit
Power for described comparator.
6. circuit according to claim 5 is it is characterised in that described voltage regulation unit includes Zener diode and/or voltage stabilizing
Device.
7. according to the arbitrary described circuit of claim 3-6 it is characterised in that described temperature-sensitive bag is compared to described with first resistor
The first input port of input comparator after the supply voltage partial pressure of device, second resistance and the confession to described comparator for the 3rd resistor
Second input port of input comparator after piezoelectric voltage partial pressure, the 4th resistance is connected across the second input port and the output of comparator
Between port.
8. according to the arbitrary described circuit of claim 1-7 it is characterised in that described temperature-sensitive bag is negative temperature coefficient temperature-sensitive bag.
9. a kind of Switching Power Supply is it is characterised in that include described feedback control circuit as arbitrary in claim 1-8.
10. a kind of water dispenser is it is characterised in that include Switching Power Supply as claimed in claim 9.
A kind of 11. feedbacks of Switching Power Supply are it is characterised in that include：
Setting temperature-sensitive bag, according to the change of environment temperature, the resistance of described temperature-sensitive bag changes；
Change according to described temperature adjusts the output of first voltage, and described first voltage is load supplying；
The output that the described change according to temperature adjusts first voltage is specially：When described temperature is less than the first temperature, first
Voltage is maintained at first threshold voltage value, and described first threshold voltage value is not result in that environment temperature continues to reduce.
12. methods according to claim 11 it is characterised in that when described temperature be more than second temperature when, first voltage
It is maintained at second threshold voltage value, described second threshold voltage is more than described first threshold voltage；
And/or when described temperature changes between described first temperature and second temperature, described first voltage is in first threshold
Change between magnitude of voltage and described second threshold voltage value.
13. methods according to claim 11 or 12 are it is characterised in that described Switching Power Supply includes first voltage output
End, arranges comparator, and described temperature-sensitive bag is connected with the input of described comparator, and the voltage signal of the output of described comparator is made
Control the output of first voltage for feedback signal.
14. methods according to claim 13 are it is characterised in that described first voltage output end is the first of Switching Power Supply
The voltage of winding voltage output end output is through over commutation and/or filtered voltage output port.
15. methods according to claim 13 or 14 it is characterised in that described Switching Power Supply to include the second winding voltage defeated
Go out end, voltage regulation unit is set, and the voltage of described second winding voltage output end output is described ratio after described voltage regulation unit
Power compared with device.
16. methods according to claim 15 are it is characterised in that described voltage regulation unit includes Zener diode and/or steady
Depressor.
17. according to the arbitrary described method of claim 13-16 it is characterised in that described temperature-sensitive bag with first resistor to described
The first input port of input comparator after the supply voltage partial pressure of comparator, second resistance and 3rd resistor are to described comparator
Supply voltage partial pressure after input comparator the second input port, the 4th resistance be connected across the second input port of comparator with
Between output port.
18. according to the arbitrary described method of claim 11-17 it is characterised in that described temperature-sensitive bag be negative temperature coefficient temperature-sensitive
Bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610728278.XA CN106406385B (en) | 2016-08-25 | 2016-08-25 | A kind of feedback control circuit of Switching Power Supply, method, Switching Power Supply and water dispenser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610728278.XA CN106406385B (en) | 2016-08-25 | 2016-08-25 | A kind of feedback control circuit of Switching Power Supply, method, Switching Power Supply and water dispenser |
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| CN106406385A true CN106406385A (en) | 2017-02-15 |
| CN106406385B CN106406385B (en) | 2019-01-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202748681U (en) * | 2012-08-14 | 2013-02-20 | 宁波婷微电子科技有限公司 | Energy-saving controller of semiconductor refrigerator |
| CN202840963U (en) * | 2012-07-14 | 2013-03-27 | 佛山市天汇龙电子有限公司 | Special fly-back switching power supply for electronic refrigeration type water dispensers and ice bar wine cabinets |
| CN105375785A (en) * | 2015-10-22 | 2016-03-02 | 珠海格力电器股份有限公司 | Household electric appliance and switching power supply control circuit and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2480883Y (en) * | 2001-05-03 | 2002-03-06 | 杨义根 | Switch power source for temp. self-adaptive drinking-water machine |
| CN201319151Y (en) * | 2008-12-02 | 2009-09-30 | 佛山市顺德区瑞德电子实业有限公司 | Refrigeration switch power supply for drinking fountain |
| CN202840963U (en) * | 2012-07-14 | 2013-03-27 | 佛山市天汇龙电子有限公司 | Special fly-back switching power supply for electronic refrigeration type water dispensers and ice bar wine cabinets |
| CN202748681U (en) * | 2012-08-14 | 2013-02-20 | 宁波婷微电子科技有限公司 | Energy-saving controller of semiconductor refrigerator |
| CN105375785A (en) * | 2015-10-22 | 2016-03-02 | 珠海格力电器股份有限公司 | Household electric appliance and switching power supply control circuit and method thereof |
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|---|---|
| CN106406385B (en) | 2019-01-29 |
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