CN106406385B - Feedback control circuit and method of switching power supply, switching power supply and water dispenser - Google Patents
Feedback control circuit and method of switching power supply, switching power supply and water dispenser Download PDFInfo
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- CN106406385B CN106406385B CN201610728278.XA CN201610728278A CN106406385B CN 106406385 B CN106406385 B CN 106406385B CN 201610728278 A CN201610728278 A CN 201610728278A CN 106406385 B CN106406385 B CN 106406385B
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- 238000000034 method Methods 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000008859 change Effects 0.000 claims abstract description 23
- 238000004804 winding Methods 0.000 claims description 25
- 230000033228 biological regulation Effects 0.000 claims description 23
- 230000005611 electricity Effects 0.000 claims description 13
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 230000000087 stabilizing effect Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
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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 feedback control circuit and method of a switching power supply, the switching power supply and a water dispenser. Wherein, the circuit includes: the temperature sensing device comprises a temperature sensing bulb and a first voltage control unit, wherein the resistance value of the temperature sensing bulb changes according to the change of the ambient temperature; the first voltage control unit adjusts output of a first voltage according to the change of the temperature, and the first voltage supplies power to a load; the adjusting the output of the first voltage according to the change of the temperature specifically includes: when the temperature is lower than the first temperature, the first voltage is kept at a first threshold voltage value, and the first threshold voltage value does not cause the environment temperature to continuously decrease. The scheme provided by the invention can ensure that when the detected temperature is less than the specific value, the power output from the switching power supply to the load does not cause the further temperature reduction, thereby ensuring the system to have stable performance and saving energy consumption.
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 technique
In the prior art, Switching Power Supply is mostly fixed or segmentation output voltage mode.Traditional Switching Power Supply is for existing
When having in the electric appliance with refrigerating function, such as when applied to water dispenser, when environment temperature is very low, Switching Power Supply is supplied to negative
The output power of load still results in constant temperature decline, finally will lead to the water freezing in electric appliance, and ice occurs and blocks up phenomenon.
If completely cutting through power after refrigeration, cooling assembly is made to stop working, then will lead to water temperature and go up rapidly,
The very short time will restore to freeze again, and final result will lead to overall power rising, and efficiency grade, which is difficult to reach regulation, to be wanted
It asks.
Summary of the invention
It is a primary object of the present invention to overcome the defect of the 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, including temperature sensing package and first voltage control
Unit, the temperature sensing package, depending on changes in ambient temperature, the resistance value of the temperature sensing package change；The first voltage control
Unit, according to the output of the variation adjustment first voltage of the temperature, the first voltage is load supplying；It is described according to temperature
Variation adjustment first voltage output specifically: when the temperature is less than the first temperature, first voltage is maintained at the first threshold
Threshold voltage value, the first threshold voltage value not will lead to environment temperature and continue to reduce.
Optionally, when the temperature is greater than second temperature, first voltage is maintained at second threshold voltage value, and described second
Threshold voltage is greater than the first threshold voltage；And/or when the temperature changes between first temperature and second temperature
When, the first voltage changes between first threshold voltage value and the second threshold voltage value.
Optionally, the Switching Power Supply includes first voltage output end, and the first voltage control unit includes comparator,
The temperature sensing package is connected with the input terminal of the comparator, and the voltage signal of the output of the comparator is controlled as feedback signal
The output of first voltage.
Optionally, the first voltage output end is that the voltage of the first winding voltage output end output of Switching Power Supply passes through
Rectification, and/or filtered voltage output port.
Optionally, the Switching Power Supply includes the second winding voltage output end, and the control circuit further includes voltage regulation unit,
The voltage of the second winding voltage output end output is the comparator power supply after voltage regulation unit.
Optionally, the voltage regulation unit includes zener diode and/or voltage-stablizer.
Optionally, the temperature sensing package and first resistor to input comparator after the supply voltage partial pressure of the comparator the
The second input of one input port, second resistance and 3rd resistor to input comparator after the supply voltage partial pressure of the comparator
Port, the 4th resistance are connected across between the second input port of comparator and output port.
Optionally, the temperature sensing package is negative temperature coefficient temperature sensing package.
Another aspect of the invention provides a kind of Switching Power Supply, including aforementioned any 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, comprising: setting temperature sensing package, according to ring
The resistance value of the variation of border temperature, the temperature sensing package changes；According to the output of the variation adjustment first voltage of the temperature, institute
Stating first voltage is load supplying；The output of the variation adjustment first voltage according to temperature specifically: when the temperature is small
When the first temperature, first voltage is maintained at first threshold voltage value, and the first threshold voltage value not will lead to environment temperature
Continue to reduce.
Optionally, when the temperature is greater than second temperature, first voltage is maintained at second threshold voltage value, and described second
Threshold voltage is greater than the first threshold voltage；And/or when the temperature changes between first temperature and second temperature
When, the first voltage changes between first threshold voltage value and the second threshold voltage value.
Optionally, the Switching Power Supply includes first voltage output end, comparator is arranged, the temperature sensing package is compared with described
The input terminal of device is connected, output of the voltage signal of the output of the comparator as feedback signal control first voltage.
Optionally, the first voltage output end is that the voltage of the first winding voltage output end output of Switching Power Supply passes through
Rectification, and/or filtered voltage output port.
Optionally, the Switching Power Supply includes the second winding voltage output end, and voltage regulation unit, the second winding electricity is arranged
The voltage of pressure output end output is the comparator power supply after the voltage regulation unit.
Optionally, the voltage regulation unit includes zener diode and/or voltage-stablizer.
Optionally, the temperature sensing package and first resistor to input comparator after the supply voltage partial pressure of the comparator the
The second input of one input port, second resistance and 3rd resistor to input comparator after the supply voltage partial pressure of the comparator
Port, the 4th resistance are connected across between the second input port of comparator and output port.
Optionally, the temperature sensing package is negative temperature coefficient temperature sensing package.
The solution of the present invention is enabled to when the temperature of detection is less than particular value, and Switching Power Supply is exported to bearing power
It not will lead to temperature further to decline, to guarantee that system has stable performance, and energy saving.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of an embodiment of the feedback control circuit of Switching Power Supply provided by the invention；
Fig. 2 is the structural schematic diagram of the another embodiment of the feedback control circuit of Switching Power Supply provided by the invention；
Fig. 3 is the circuit diagram of an embodiment of the feedback control circuit of Switching Power Supply provided by the invention；
Fig. 4 is the structural schematic diagram of an embodiment of Switching Power Supply provided by the invention；
Fig. 5 is the method schematic diagram of an embodiment of the feedback of Switching Power Supply provided by the invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Fig. 1 is the structural schematic diagram of an embodiment of the feedback control circuit of Switching Power Supply provided by the invention.
The embodiment of the invention, as shown in Figure 1.The feedback control circuit 10 of Switching Power Supply, including temperature sensing package 101
With first voltage control unit 103.
Temperature sensing package, depending on changes in ambient temperature, the resistance value of the temperature sensing package change.
For example, temperature sensing package can be positive temperature coefficient temperature sensing package PTC, it is also possible to negative temperature coefficient temperature sensing package NTC.With negative
For temperature coefficient temperature sensing package NTC, when temperature is low, the resistance of temperature sensing package is higher, as the temperature rises, the electricity of temperature sensing package
Hindering resistance value reduces.
First voltage control unit, according to the output of the variation adjustment first voltage of the temperature, the first voltage is
Load supplying.
Load, e.g. the warm up/down component of water dispenser.The resistance variation with temperature of temperature sensing package and change, therefore
It can be according to the output of the variation control first voltage of resistance value, to realize that first voltage and the temperature change of output are in certain pass
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 not will lead to environment temperature and continue to reduce.For example, in the application of water dispenser
In, reference value be 7 watts, when first threshold voltage be not more than 7 watt-hours, the first voltage of output will not result in water temperature further on
It rises.
Optionally, when the temperature is greater than second temperature, such as T2, first voltage are maintained at second threshold voltage value
V1max, the second threshold voltage are greater than the 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, ensure that system
Stable and safety.
When the temperature changes between first temperature and second temperature, the first voltage is in first threshold electricity
Change between pressure value and the second threshold voltage value.For example, first voltage exists when temperature is in [T1, T2] range
Variation in [V1min, V1max] range.
Fig. 2 is the structural schematic diagram of the another embodiment of the feedback control circuit of Switching Power Supply provided by the invention.
Specific embodiment party of the invention is, in conjunction with the various aspects of other embodiments of the present invention.The feedback of Switching Power Supply
Control circuit 20, including temperature sensing package 201 and first voltage control unit 203.Wherein first voltage control unit includes comparator
2031。
Temperature sensing package, depending on changes in ambient temperature, the resistance value of the temperature sensing package change.
For example, temperature sensing package can be positive temperature coefficient temperature sensing package PTC, it is also possible to negative temperature coefficient temperature sensing package NTC.With negative
For temperature coefficient temperature sensing package NTC, when temperature is low, the resistance of temperature sensing package is higher, as the temperature rises, the electricity of temperature sensing package
Hindering resistance value reduces.
First voltage control unit, according to the output of the variation adjustment first voltage of the temperature, the first voltage is
Load supplying.
Load, e.g. the warm up/down component of water dispenser.The resistance variation with temperature of temperature sensing package and change, therefore
It can be according to the output of the variation control first voltage of resistance value, to realize that first voltage and the temperature change of output are in certain pass
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 not will lead to environment temperature and continue to reduce.For example, in the application of water dispenser
In, reference value be 7 watts, when first threshold voltage be not more than 7 watt-hours, the first voltage of output will not result in water temperature further on
It rises.
Optionally, when the temperature is greater than second temperature, such as T2, first voltage are maintained at second threshold voltage value
V1max, the second threshold voltage are greater than the 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, ensure that system
Stable and safety.
When the temperature changes between first temperature and second temperature, the first voltage is in first threshold electricity
Change between pressure value and the second threshold voltage value.For example, first voltage exists when temperature is in [T1, T2] range
Variation in [V1min, V1max] range
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 sensing package is connected with the input terminal of comparator, and the voltage signal of the output of comparator is as feedback letter
Number control first voltage output.
Optionally, 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 rectifier diode), and/or filtering (such as filter capacitor).
In yet another embodiment, the Switching Power Supply includes the second winding voltage output end, and the control circuit is also wrapped
Voltage regulation unit is included, the voltage of the second winding voltage output end output is the comparator power supply after voltage regulation unit.Example
Such as, the power supply of comparator needs the fixed voltage VCC of 5V, then the second winding voltage forms fixed 5V voltage after pressure stabilizing.
Optionally voltage regulation unit includes zener diode and/or voltage-stablizer.
Optionally, the first of input comparator is defeated after temperature sensing package and first resistor divide the supply voltage of the comparator
The second input terminal of inbound port, second resistance and 3rd resistor to input comparator after the supply voltage partial pressure of the comparator
Mouthful, the 4th resistance is connected across between the second input port of comparator and output port.It therefore, can be according to practical application not
Together, it is determined that the minimum temperature (the first temperature) for needing to control selects suitable temperature sensing package, different temperature sensing package resistance and temperature
Variation relation it is different, and according to the voltage value for determining 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 an embodiment of the feedback control circuit of Switching Power Supply provided by the invention.The present invention one has
Body embodiment, in conjunction with the various aspects of other embodiments of the present invention.T1 is the high frequency transformer of Switching Power Supply.D1, D2 are
Secondary Schottky barrier diodes carry out secondary side filtering for the output of power supply secondary, and C1, C2, C3 is electrolytic capacitor filter.D3 is
Zener diode is limited to the input voltage vin of 7805 Voltage stabilizing module of U3 offer, and Q1 is NPN type triode, and R1 is D3 and Q1
Current limliting divider resistance.
U4 is optocoupler, the main devices as isolated from power and transmission feedback signal.U2TL431 Voltage stabilizing module, C4, R10
RC circuit is constituted, is compensated for route.R2, R3, R4 are 1% high-precision divider resistance.R5 is 1% precision output current limiting electricity
Resistance, R6 are 1% precision feedback resistance, and U1 is 358 comparators, and R7, R8, R9 is the divider resistance of 358 chip input terminals.NTC1 is
Connect the interface of negative temperature coefficient temperature sensing package.
If the work in [T1, T2] & [T2 ,+∞] range of NTC temperature sensing package, T1, T2 temperature range o'clock is by 358 comparators
Divider resistance R6, R7, R8, R9, NTC1 are determined, when temperature is greater than T2,358 comparators will export low level (such as 1.5V),
431 Voltage stabilizing modules will generate feedback signal according to its divider resistance R3, R4 at this time, and Switching Power Supply is made to export stable V1max (example
Such as 12V) operating voltage.
It, will already below working range, but maloperation in order to prevent is provided when temperature is less than T1 (such as 3 degrees Celsius)
358 chip of U1 is set to export 3.5V, Switching Power Supply exports stable output V1min (such as 4V), guarantees that water temperature does not continue to drop
It is low.
When temperature is less than T2, is greater than T1, with the variation of NTC1 temperature sensing package resistance value, 358 comparators change output
High level voltage, such as its variation range are V358=1.5~3.5V, and the output voltage of 358 comparators is according to temperature sensing package at this time
The variation of detected resistance and change, the feedback signal that instant 431 Voltage stabilizing module generates also by according to the variation of 358 output voltages and
Change, the change of feedback will affect the output voltage of Switching Power Supply, make the first winding output voltage V1 and the second winding of power supply
Output voltage V2 generates change.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 of load, and V1max will make load output rated maximum power, system
Cold efficiency highest.V1min will make load in low-power keeping warm mode, this power will not make water temperature continue to reduce.V2 is by steady
After pressure, stable 5V VCC is exported.
Fig. 4 is the structural schematic diagram of an embodiment of Switching Power Supply provided by the invention.The embodiment of the invention,
In conjunction with the various aspects of other embodiments of the present invention.A kind of Switching Power Supply, which is characterized in that including such as each implementation of the present invention
The feedback control circuit that mode provides.
The embodiment of the invention, in conjunction with the various aspects of other embodiments of the present invention.A kind of water dispenser, including
The Switching Power Supply provided such as each embodiment of the present invention.
Fig. 5 is the method schematic diagram of an embodiment of the feedback of Switching Power Supply provided by the invention.The present invention
One specific embodiment, in conjunction with the various aspects of other embodiments 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.
Temperature sensing package is arranged in step S410, and depending on changes in ambient temperature, the resistance value of the temperature sensing package changes.
For example, temperature sensing package can be positive temperature coefficient temperature sensing package PTC, it is also possible to negative temperature coefficient temperature sensing package NTC.With negative
For temperature coefficient temperature sensing package NTC, when temperature is low, the resistance of temperature sensing package is higher, as the temperature rises, the electricity of temperature sensing package
Hindering resistance value reduces.
According to the output of the variation adjustment first voltage of the temperature, the first voltage is load supplying.
Load, e.g. the warm up/down component of water dispenser.The resistance variation with temperature of temperature sensing package and change, therefore
It can be according to the output of the variation control first voltage of resistance value, to realize that first voltage and the temperature change of output are in certain pass
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 not will lead to environment temperature and continue to reduce.For example, in the application of water dispenser
In, reference value be 7 watts, when first threshold voltage be not more than 7 watt-hours, the first voltage of output will not result in water temperature further on
It rises.
Optionally, when the temperature is greater than second temperature, such as T2, first voltage are maintained at second threshold voltage value
V1max, the second threshold voltage are greater than the 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, ensure that system
Stable and safety.
When the temperature changes between first temperature and second temperature, the first voltage is in first threshold electricity
Change between pressure value and the second threshold voltage value.For example, first voltage exists when temperature is in [T1, T2] range
Variation in [V1min, V1max] range.
Optionally, Switching Power Supply includes first voltage output end, for exporting first voltage.First voltage control unit packet
Comparator is included, temperature sensing package is connected with the input terminal of comparator, and the voltage signal of the output of comparator is as feedback signal control the
The output of one voltage.
Optionally, 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 rectifier diode), and/or filtering (such as filter capacitor).
In yet another embodiment, the Switching Power Supply includes the second winding voltage output end, and the control circuit is also wrapped
Voltage regulation unit is included, the voltage of the second winding voltage output end output is the comparator power supply after voltage regulation unit.Example
Such as, the power supply of comparator needs the fixed voltage VCC of 5V, then the second winding voltage forms fixed 5V voltage after pressure stabilizing.
Optionally voltage regulation unit includes zener diode and/or voltage-stablizer.
Optionally, the first of input comparator is defeated after temperature sensing package and first resistor divide the supply voltage of the comparator
The second input terminal of inbound port, second resistance and 3rd resistor to input comparator after the supply voltage partial pressure of the comparator
Mouthful, the 4th resistance is connected across between the second input port of comparator and output port.It therefore, can be according to practical application not
Together, it is determined that the minimum temperature (the first temperature) for needing to control selects suitable temperature sensing package, different temperature sensing package resistance and temperature
Variation relation it is different, and according to the voltage value for determining first threshold voltage value and the second threshold, can determine first resistor, second
Resistance, 3rd resistor, the value of the 4th resistance.
As a result, utilize the solution of the present invention, enable to when the temperature of detection be less than particular value when, Switching Power Supply export to
Bearing power not will lead to temperature and further decline, to guarantee that system has stable performance, and energy saving.
Function described herein can be implemented in hardware, the software executed by processor, firmware or any combination thereof.
If implemented in the software executed by processor, computer can be stored in using function as one or more instructions or codes
It is transmitted on readable media or via computer-readable media.Other examples and embodiment are wanted in the present invention and appended right
It asks in the scope and spirit of book.For example, due to the property of software, function described above can be used by processor,
Hardware, firmware, hardwired or the software implementation for appointing the combination of whichever to execute in these.In addition, each functional unit can integrate
In one processing unit, it is also possible to each unit to physically exist alone, can also be integrated in two or more units
In one unit.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, circuit embodiments described above are only schematical, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, as control electricity
The component on road may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above description is only an embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (30)
1. a kind of feedback control circuit of Switching Power Supply, which is characterized in that including temperature sensing package and first voltage control unit,
The temperature sensing package, depending on changes in ambient temperature, the resistance value of the temperature sensing package change；
The first voltage control unit, according to the output of the variation adjustment first voltage of the temperature, the first voltage is
Load supplying；
The output of the variation adjustment first voltage according to temperature specifically: when the temperature is less than the first temperature, first
Voltage is maintained at first threshold voltage value, and the first threshold voltage value not will lead to environment temperature and continue to reduce；When the temperature
When degree is greater than second temperature, first voltage is maintained at second threshold voltage value, and the second threshold voltage is greater than first threshold
Threshold voltage.
2. circuit according to claim 1, which is characterized in that when the temperature first temperature and second temperature it
Between when changing, the first voltage changes between first threshold voltage value and the second threshold voltage value.
3. circuit according to claim 1 or 2, which is characterized in that the Switching Power Supply includes first voltage output end, institute
Stating first voltage control unit includes comparator, and the temperature sensing package is connected with the input terminal of the comparator, the comparator
Output of the voltage signal of output as feedback signal control first voltage.
4. circuit according to claim 3, which is characterized in that the 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. circuit according to claim 3, which is characterized in that the Switching Power Supply includes the second winding voltage output end,
The control circuit further includes voltage regulation unit, and the voltage of the second winding voltage output end output is institute after voltage regulation unit
State comparator power supply.
6. circuit according to claim 4, which is characterized in that the Switching Power Supply includes the second winding voltage output end,
The control circuit further includes voltage regulation unit, and the voltage of the second winding voltage output end output is institute after voltage regulation unit
State comparator power supply.
7. circuit according to claim 5 or 6, which is characterized in that the voltage regulation unit includes zener diode and/or steady
Depressor.
8. circuit according to claim 3, which is characterized in that the confession of the temperature sensing package and first resistor to the comparator
The supply voltage of the first input port of input comparator, second resistance and 3rd resistor to the comparator after piezoelectric voltage partial pressure
Second input port of input comparator after partial pressure, the 4th resistance be connected across comparator the second input port and output port it
Between.
9. according to any circuit of claim 4-6, which is characterized in that the temperature sensing package is with first resistor to compared with described
The first input port of input comparator, the confession of second resistance and 3rd resistor to the comparator after the supply voltage partial pressure of device
Second input port of input comparator after piezoelectric voltage partial pressure, the 4th resistance are connected across the second input port and the output of comparator
Between port.
10. circuit according to claim 7, which is characterized in that the temperature sensing package and first resistor are to the comparator
The power supply electricity of the first input port of input comparator, second resistance and 3rd resistor to the comparator after supply voltage partial pressure
The second input port of input comparator, the 4th resistance are connected across the second input port and output port of comparator after pressure partial pressure
Between.
11. according to claim 1,2, any circuit in 4-6,8,10, which is characterized in that the temperature sensing package is negative temperature system
Number temperature sensing package.
12. circuit according to claim 3, which is characterized in that the temperature sensing package is negative temperature coefficient temperature sensing package.
13. circuit according to claim 7, which is characterized in that the temperature sensing package is negative temperature coefficient temperature sensing package.
14. circuit according to claim 9, which is characterized in that the temperature sensing package is negative temperature coefficient temperature sensing package.
15. a kind of Switching Power Supply, which is characterized in that including the feedback control circuit as described in claim 1-14 is any.
16. a kind of water dispenser, which is characterized in that including Switching Power Supply as claimed in claim 15.
17. a kind of feedback of Switching Power Supply characterized by comprising
Temperature sensing package is set, and depending on changes in ambient temperature, the resistance value of the temperature sensing package changes；
According to the output of the variation adjustment first voltage of the temperature, the first voltage is load supplying；
The output of the variation adjustment first voltage according to temperature specifically: when the temperature is less than the first temperature, first
Voltage is maintained at first threshold voltage value, and the first threshold voltage value not will lead to environment temperature and continue to reduce；When the temperature
When degree is greater than second temperature, first voltage is maintained at second threshold voltage value, and the second threshold voltage is greater than first threshold
Threshold voltage.
18. according to the method for claim 17, which is characterized in that when the temperature is in first temperature and second temperature
Between when changing, the first voltage changes between first threshold voltage value and the second threshold voltage value.
19. method described in 7 or 18 according to claim 1, which is characterized in that the Switching Power Supply includes first voltage output
Comparator is arranged in end, and the temperature sensing package is connected with the input terminal of the comparator, and the voltage signal of the output of the comparator is made
The output of first voltage is controlled for feedback signal.
20. according to the method for claim 19, which is characterized in that the 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.
21. according to the method for claim 19, which is characterized in that the Switching Power Supply is exported including the second winding voltage
Voltage regulation unit is arranged in end, and the voltage of the second winding voltage output end output is the comparison after the voltage regulation unit
Device power supply.
22. according to the method for claim 20, which is characterized in that the Switching Power Supply is exported including the second winding voltage
Voltage regulation unit is arranged in end, and the voltage of the second winding voltage output end output is the comparison after the voltage regulation unit
Device power supply.
23. the method according to claim 21 or 22, which is characterized in that the voltage regulation unit include zener diode and/
Or voltage-stablizer.
24. according to the method for claim 19, which is characterized in that the temperature sensing package and first resistor are to the comparator
The power supply electricity of the first input port of input comparator, second resistance and 3rd resistor to the comparator after supply voltage partial pressure
The second input port of input comparator, the 4th resistance are connected across the second input port and output port of comparator after pressure partial pressure
Between.
25. according to any method of claim 20-22, which is characterized in that the temperature sensing package and first resistor are to described
The first input port of input comparator after the supply voltage partial pressure of comparator, second resistance and 3rd resistor are to the 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.
26. according to the method for claim 23, which is characterized in that the temperature sensing package and first resistor are to the comparator
The power supply electricity of the first input port of input comparator, second resistance and 3rd resistor to the comparator after supply voltage partial pressure
The second input port of input comparator, the 4th resistance are connected across the second input port and output port of comparator after pressure partial pressure
Between.
27. 7,18, any method in 20-22,24,26 according to claim 1, which is characterized in that the temperature sensing package is negative
Temperature coefficient temperature sensing package.
28. according to the method for claim 19, which is characterized in that the temperature sensing package is negative temperature coefficient temperature sensing package.
29. according to the method for claim 23, which is characterized in that the temperature sensing package is negative temperature coefficient temperature sensing package.
30. according to the method for claim 25, which is characterized in that the temperature sensing package is negative temperature coefficient temperature sensing package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610728278.XA CN106406385B (en) | 2016-08-25 | 2016-08-25 | Feedback control circuit and method of switching power supply, switching power supply and water dispenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610728278.XA CN106406385B (en) | 2016-08-25 | 2016-08-25 | Feedback control circuit and method of switching power supply, switching power supply and water dispenser |
Publications (2)
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| CN106406385A CN106406385A (en) | 2017-02-15 |
| CN106406385B true CN106406385B (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610728278.XA Active CN106406385B (en) | 2016-08-25 | 2016-08-25 | Feedback control circuit and method of switching power supply, switching power supply and water dispenser |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105375785A (en) * | 2015-10-22 | 2016-03-02 | 珠海格力电器股份有限公司 | Household appliance and control circuit and method of switching power supply thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-08-25 CN CN201610728278.XA patent/CN106406385B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105375785A (en) * | 2015-10-22 | 2016-03-02 | 珠海格力电器股份有限公司 | Household appliance and control circuit and method of switching power supply thereof |
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| CN106406385A (en) | 2017-02-15 |
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