CN108365745A - Switching Power Supply and cooking equipment - Google Patents
Switching Power Supply and cooking equipment Download PDFInfo
- Publication number
- CN108365745A CN108365745A CN201810387255.6A CN201810387255A CN108365745A CN 108365745 A CN108365745 A CN 108365745A CN 201810387255 A CN201810387255 A CN 201810387255A CN 108365745 A CN108365745 A CN 108365745A
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- CN
- China
- Prior art keywords
- electrolytic capacitor
- power supply
- switching power
- rectification part
- rectification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
Abstract
The invention discloses a kind of Switching Power Supplies, including the first rectification part and the second rectification part.First rectification part includes the first electrolytic capacitor, and the first rectification part is used to carry out rectification to output voltage when the first electrolytic capacitor is enabled.Second rectification part includes the second electrolytic capacitor, and the second rectification part is used to carry out rectification to the output voltage when the first electrolytic capacitor fails.The invention also discloses a kind of cookers.The Switching Power Supply and cooking equipment of embodiment of the present invention are worked by the way that the second electrolytic capacitor is arranged when the first electrolytic capacitor fails, and to form the spare of the first electrolytic capacitor, effectively extend the service life of Switching Power Supply.
Description
Technical field
The present invention relates to household electrical appliance, more particularly to a kind of Switching Power Supply and cooking equipment.
Background technology
Switching Power Supply has generally included electrolytic capacitor, however electrolytic capacitor has volatility and the longevity in hot operation
Life is shorter, causes the fragile service life of Switching Power Supply short, user often can not effectively judge whether electrolytic capacitor reaches use
Service life.
Invention content
A kind of Switching Power Supply of embodiments of the present invention offer and cooking equipment.
The Switching Power Supply of embodiment of the present invention, including：
First rectification part, first rectification part include the first electrolytic capacitor, and first rectification part is used for described
Rectification is carried out to output voltage when first electrolytic capacitor is enabled；With
Second rectification part, second rectification part include the second electrolytic capacitor, and second rectification part is used for described
Rectification is carried out to the output voltage when first electrolytic capacitor fails.
In some embodiments, the Switching Power Supply further includes gating element, and the gating element is described for gating
First rectification part or second rectification part are to enable first electrolytic capacitor or second electrolytic capacitor.
In some embodiments, the gating element includes relay, and the relay includes the first contact and second
Contact, first electrolytic capacitor and first contact portion, second electrolytic capacitor and the second electrolysis electricity
Container connects.
In some embodiments, when first electrolytic capacitor is effective, the relay is not when powering on and institute
The connection of the second contact is stated, is connected to after the power is turned on first contact.
In some embodiments, when first electrolytic capacitor fails, the relay is kept and described second
Contact is connected to.
In some embodiments, second electrolytic capacitor is powering on instantaneous charging.
In some embodiments, first rectification part further includes first resistor, second resistance and first switching element,
The second resistance makes to lead to the first switching element to enable first rectification part for dividing.
In some embodiments, the first switching element includes diode and triode, the base stage of the triode
It is connect with the anode of the diode, the cathode of the diode is connect with the first end of the second resistance, the triode
Emitter connect with the second end of the second resistance, the collector of the triode is connect with gating element.
In some embodiments, second rectification part includes 3rd resistor, the 4th resistance and second switch element, institute
State the 4th resistance for divide make the logical second switch element to enable second rectification part.
In some embodiments, the second switch element includes bidirectional thyristor.
In some embodiments, when the ripple voltage of the output voltage is more than predetermined value, the second switch member
Part conducting is to enable second rectification part, when the ripple voltage of the output voltage is less than the predetermined value, described first
Switching elements conductive is to enable first rectification part.
The cooking equipment of embodiment of the present invention, including above-mentioned Switching Power Supply.
In some embodiments, the cooking equipment includes micro-wave oven.
The Switching Power Supply and cooking equipment of embodiment of the present invention, by the way that the second electrolytic capacitor is arranged, in the first electrolysis
It works when capacitor failure, to form the spare of the first electrolytic capacitor, effectively extends the service life of Switching Power Supply.
The advantages of additional aspect of the present invention, will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, wherein：
Fig. 1 is the structure block diagram of the Switching Power Supply of embodiment of the present invention.
Fig. 2 is the circuit diagram of the Switching Power Supply of embodiment of the present invention.
Fig. 3 is service life and capacity and the relation curve of angle of loss of the electrolytic capacitor of embodiment of the present invention.
Fig. 4 is the schematic diagram that the ripple voltage of embodiment of the present invention changes with the usage time of electrolytic capacitor.
Specific implementation mode
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein identical
Or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining embodiments of the present invention, and should not be understood as to this hair
The limitation of bright embodiment.
It please refers to Fig.1 and Fig. 2, the Switching Power Supply 100 of embodiment of the present invention includes the first rectification part 10 and the second rectification
Portion 20.First rectification part 10 includes the first electrolytic capacitor 11, and the second rectification part 20 includes the second electrolytic capacitor 21.First is whole
Stream portion 10 is used to carry out rectification to output voltage when the first electrolytic capacitor 11 is enabled.Second rectification part 20 is used in the first electricity
Rectification is carried out to output voltage by the second electrolytic capacitor 21 when electrolysis condenser 11 fails.
The Switching Power Supply 100 of embodiment of the present invention can be applied to the cooking equipment of embodiment of the present invention, and culinary art is set
Standby can be micro-wave oven or electromagnetic oven etc..In addition, Switching Power Supply 100 applies also for other household electrical appliance, it is not limited specifically.
Specifically, Switching Power Supply 100 is applied in household electrical appliance, for being converted to the alternating current of input needed for user terminal
The direct current asked.Usually, include electrolytic capacitor in Switching Power Supply 100, for output voltage carry out rectification and
Filtering.The service life of electrolytic capacitor often determines the service life of entire Switching Power Supply, and the service life of electrolytic capacitor is then long-term with it
The environment temperature of work is related, in general, temperature is higher, the service life of electrolytic capacitor is shorter.And in order to which Switching Power Supply and electronics are set
The operating ambient temperature of standby Miniaturization Design, electrolytic capacitor is usually higher, and can not use the capacitor of large capacity,
After a period of use, the capacity of electrolytic capacitor can be reduced.In addition, the electrolyte inside electrolytic capacitor has certain wave
Hair property, thus electrolytic capacitor equally will produce capacitance loss when room temperature preserves non-working condition in other words.Work as electrolytic capacitor
After the arrival service life of device, Switching Power Supply also will be unable to work, need relevant staff if you need to be continuing with Switching Power Supply
Electrolytic capacitor is replaced manually.
Specifically, the calculation formula in the service life of electrolytic capacitor is as follows：
Wherein, the service life of L is environment temperature when being T electrolytic capacitor, L0For maximum temperature when electrolytic capacitor volume
Determine the service life.
As electrolytic capacitor usage time increases, the capacity of electrolytic capacitor is reduced, and internal resistance value increases, when work
Ripple voltage increases.
Referring to Fig. 3, in one example, according to the relationship in the service life of electrolytic vessel device and capacity and angle of loss, when
Environment temperature is 100 degrees Celsius, and after 10000 hours, capacity reduces 25%, and angle of loss 1.5 is calculated public by angle of loss
Formula,
When initial, tan θ=0.07, C=4400 μ F, R=0.04 Ω.After using 10000 hours, tan θ=0.12, C
=4400 μ F, R=0.45 Ω.
Ripple voltage calculation formula is as follows：
Wherein, Δ iLFor ripple current, VoFor output voltage, ViFor input voltage, the equivalent series electricity that ESR is capacitance C
Resistance, fzFor switching frequency.Under normal circumstances, the ESR of capacity capacitor is right according to the calculation formula in more than ten to tens milliohms
For the part in bracket, ESR influences bigger for ripple voltage.Usually, when capacitance is more than 330 μ F, internal resistance is basic
Equal to ESR.It can be seen that as usage time increases, internal resistance increases, and ripple voltage increases.
In embodiment of the present invention, the first rectification part 10 that is to say the circuit where the first electrolytic capacitor 11, when first
When electrolytic capacitor 11 enables, the first rectification part 10 is used to carry out rectification to output voltage.First electrolytic capacitor 11 is enabled
Be that the first electrolytic capacitor 11 does not reach service life also, can normal use state.It is to be appreciated that when the first electrolysis electricity
When container 11 can be used normally, the second electrolytic capacitor 21 is used as spare electrolytic capacitor, normal storage to be placed in Switching Power Supply
It, in some examples, can be to charging that it is timed to extend the preservation service life of spare electrolytic capacitor in 100.And when the
One electrolytic capacitor 11 failure that is to say that the second electrolytic capacitor 21 comes into force when reaching service life, where circuit that is to say
Second rectification part 20, for carrying out rectification to output voltage.
It is to be appreciated that relative to the Switching Power Supply for only including an electrolytic capacitor, under same use environment, the present invention
It is that the design of double electrolytic capacitors of embodiment effectively extends the service life of Switching Power Supply 100.In one example,
Control group Switching Power Supply only includes an electrolytic capacitor, and the capacitance of the electrolytic capacitor is 10 μ F, embodiment of the present invention
The capacitance of Switching Power Supply 100, the first electrolytic capacitor 11 is 10 μ F, and the capacitance of the second electrolytic capacitor 21 is 10 μ F, work
It is 80 degrees Celsius to make environment temperature.The electrolysis electrolytic capacitor service life of control group is 2.54, corresponding, embodiment party of the present invention
In the Switching Power Supply 100 of formula, the service life of the first electrolytic capacitor 11 is 2.54,2.54 enabled in the first electrolytic capacitor 11
Nian Zhong, the capacity of 21 static capacity of the second electrolytic capacitor volatilization decaying 53%, under the same conditions, the second electrolytic capacitor 21
It can work on 2.02.Under identical working environment, the service life of Switching Power Supply 100 is 4.56, relative to opening for control group
Powered-down source extends 2.02.
In another example, control group Switching Power Supply only includes an electrolytic capacitor, the capacitance of the electrolytic capacitor
Capacitance for 10 μ F, the Switching Power Supply 100 of embodiment of the present invention, the first electrolytic capacitor 11 is 10 μ F, the second electrolysis electricity
The capacitance of container 21 is 10 μ F, and operating ambient temperature is 100 degrees Celsius.The electrolysis electrolytic capacitor service life of control group is 0.56
Year, corresponding, in the Switching Power Supply 100 of embodiment of the present invention, service life of the first electrolytic capacitor 11 is 0.56, the
In 0.56 that one electrolytic capacitor 11 enables, the capacity of 21 static capacity of the second electrolytic capacitor volatilization decaying 32%, in phase
With under the conditions of, the second electrolytic capacitor 21 can work on 0.45.Under identical working environment, the service life of Switching Power Supply 100
It it is 1.01, the Switching Power Supply relative to control group extends 0.45.
Furthermore, it is to be understood that ground, since the temperature inside Switching Power Supply is higher, for the use of electrolytic capacitor is appropriately extended
Service life need to use heat dissipation appropriate, such as increase heat dissipation element, such as cooling fin or fan, inevitably make switch
The volume of power supply increases, and in embodiment of the present invention, the conduct of the second electrolytic capacitor 21 is spare, even if in the high temperature environment,
The service life of Switching Power Supply 100 can effectively be extended to a certain extent, therefore can be omitted heat dissipation element, be conducive to Switching Power Supply
Miniaturization Design and can be cost-effective.
In conclusion the Switching Power Supply 100 and cooking equipment of embodiment of the present invention, by the way that the second electrolytic capacitor is arranged
21, it works when the first electrolytic capacitor 11 fails, to form the spare of the first electrolytic capacitor 11, effectively extends switch electricity
The service life in source 100.Meanwhile be conducive to Switching Power Supply 100 Miniaturization Design and can be cost-effective.
In some embodiments, Switching Power Supply 100 further includes gating element 30, and gating element 30 is whole for gating first
Stream portion 10 or the second rectification part 20 are gating the second rectification part to enable the first electrolytic capacitor 11 when gating the first rectification part 10
The second electrolytic capacitor 21 is enabled when 20.
Preferably, in such an embodiment, gating element 30 can be relay.Relay is two node relays
Device, including the first contact a and the second contact b.Wherein, the first electrolytic capacitor 11 is connect with the first contact a, the second electrolytic capacitor
Device b is connect with the second electrolytic capacitor 21.
Specifically, relay is usually implemented as the switch of selection circuit, and two contacts are respectively at the electricity in two circuits
Electrolysis condenser connects, and when gating a certain road, the electrolytic capacitor in the circuit is enabled.When not powering on, the node of relay
Connect the second contact b.After the power-up, the node of relay connects the first contact a, the conducting of the first rectification part 10, the first electrolysis electricity
Container 11 works.
It is to be appreciated that the above situation is effective in the first electrolytic capacitor 11, when that is to say not up to service life, and
When the first electrolytic capacitor 11 fails, relay is not powering on or is keeping being connected to the second contact b after the power is turned on.
It that is to say, when the first electrolytic capacitor 11 is effective, the contact of relay connects the first contact a, when the first electrolysis
When capacitor 11 reaches service life, the contact of relay connects the second contact b.
The contact gating of relay is determined according to the service life of the first electrolytic capacitor 11, when judging the first electrolytic capacitor 11
Not up to service life when, then gate the first rectification part 10, the first electrolytic capacitor 11 work, and in the first electrolytic capacitor 11
When reaching service life, then the second rectification part 20, the work of the second electrolytic capacitor 21 are gated.
In some instances, the judgement in 11 service life of the first electrolytic capacitor, can be according to the electrolytic capacitor phase detected
Related parameter determines, such as capacitance.In other examples, the judgement in 11 service life of the first electrolytic capacitor can also be according to its institute
The first rectification part 10 electrical parameter determine, such as the first rectification part 10 and the second rectification part 20 partial pressure relationship.
In some embodiments, the first rectification part 10 further includes first resistor 12, second resistance 13 and first switch member
Part 14.First resistor 12 is connected in series with second resistance 13, and first switching element 14 is connect with second resistance 13, according to the second electricity
The first rectification part 10 is connected in the partial pressure of resistance 13.
Preferably, in such embodiments, first switching element 14 includes diode 141 and triode 142, three poles
The base stage B of pipe 142 and the anode of diode connect, and the cathode of diode is connect with the first end of second resistance 12, triode 142
Emitter E connect with the second end of second resistance 12, the collector C of triode 142 is connect with gating element 30.
Specifically, diode and triode have conducting voltage, therefore can be used as switch element in circuit, in this implementation
In mode, when conducting voltage of the partial pressure of second resistance 12 more than 142 base-emitter of diode 141 and triode, relay
The contact of device will switch to the first contact a by the second contact b, so that the first rectification part 10 and the first electrolytic capacitor 11
Work.The conducting voltage of diode 141 is slightly above the conducting voltage of 142 base-emitter of triode, can effectively prevent triode
142 mislead.
Further, in such an embodiment, the second rectification part 20 includes 3rd resistor 22, the 4th resistance 23 and the
Two switch elements 24, the 4th resistance 23 make logical second switch element 24 to enable the second rectification part 20 for dividing.
Specifically, according to second resistance 13 and the 4th electricity whether the conducting of first switching element 14 or second switch element 24
It hinders 23 respective partial pressures and determines that, when the first electrolytic capacitor 11 does not reach service life, the partial pressure of second resistance 13 may make
First rectification part 10 is connected, and when the arrival service life of the first electrolytic capacitor 11, the partial pressure of the 4th resistance 23 may make
Second rectification part 20 is connected, the work of the second electrolytic capacitor 21.
Preferably, second switch element 24 includes bidirectional thyristor.Bidirectional thyristor takes over the list for including two reverse parallel connections
To thyristor and two resistance.The sensitivity and resistance to pressure of thyristor are preferable, high-power commonly used in rectification, inversion and pressure regulation etc.
Switch element is used as in electronic circuit.Two resistance and two thyristors forming circuit, when the first electrolytic capacitor 11 reached using the longevity
When life, the partial pressure of the 4th resistance 23 so that bidirectional thyristor is connected, to be that the contact of relay is maintained at the second contact a,
Second rectification part 20 is connected, the work of the second electrolytic capacitor 21.
Referring to Fig. 4, specifically, as the first electrolytic capacitor 11 is increased using duration, service life shortens, and holds
Amount reduces, and angle of loss tangent increases, and the ripple voltage in output voltage increases therewith, when ripple voltage increases to predetermined value,
For example, in some instances, when ripple voltage increases to 43v, the partial pressure of the resistance of the 4th resistance 23 will be so that second switch
Element 24 is connected, at this point, the partial pressure of second resistance 13 is not enough to be that first switching element 14 is connected, that is to say that triode 142 is kept
Cut-off state.The contact of relay remains at the second contact b, the work of the second electrolytic capacitor 21.It is to be appreciated that working as line
When wave voltage increases to 43v, it is believed that the first electrolytic capacitor 11 arrived service life.
In other words, in present embodiment, detection for 11 service life of the first electrolytic capacitor, ripple voltage in other words
Detection, without other means or element, according only to 11 Natural Attenuation of the first electrolytic capacitor so that circuit partial pressure
Variation is generated, different rectification parts is connected, realizes the automatic switchover of electrolytic capacitor, is not necessarily to staff's manual switching, operation
It is easy.
It should be noted that Fig. 4 is only the reference waveform figure shown in oscillograph, show without setting in actual circuit design
Wave device or other controllers are monitored ripple voltage.
Further, electrolytic capacitor is placed do not use for a long time, and service life can also shorten, in the present embodiment, when
When second electrolytic capacitor 21 is as spare electrolytic capacitor, not powering on, the contact of relay is connect with the second contact b,
The moment at initial stage is powered on, the contact of relay will not be immediately switched to the first contact a, the time before switching to the first contact a
It is interior, the charging of the second electrolytic capacitor 21.In this way, each switch power supply 100 is instantaneous for as spare electrolytic capacitor what is powered on
Charging, when work, disconnect, and are conducive to 21 long-term preservation of the second electrolytic capacitor.
In some embodiments, the circuit design of embodiment of the present invention can also be applied to its in addition to Switching Power Supply
He needs the technical field using electrolytic capacitor, such as vehicle-mounted industry, security protection industry, medical electronics, medium-and-large-sized electronic equipment
In the service life of circuit where the design of idle capacity and automatic switchover can effectively extend electrolytic capacitor.
In the description of embodiments of the present invention, it is to be understood that term "center", " longitudinal direction ", " transverse direction ", " length
Degree ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The orientation or positional relationship of the instructions such as "outside", " clockwise ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, only
It is embodiments of the present invention and simplified description for ease of description, does not indicate or imply the indicated device or element is necessary
With specific orientation, with specific azimuth configuration and operation, therefore should not be understood as the limitation to embodiments of the present invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more feature.In the description of embodiments of the present invention, the meaning of " plurality " is two
It is a or more than two, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, can also be to be electrically connected or can mutually communicate；It can be directly connected, can also lead to
It crosses intermediary to be indirectly connected, can be the interaction relationship of the connection or two elements inside two elements.For ability
For the those of ordinary skill in domain, it can understand that above-mentioned term in embodiments of the present invention specific contains as the case may be
Justice.
In embodiments of the present invention unless specifically defined or limited otherwise, fisrt feature second feature it
"upper" or "lower" may include that the first and second features are in direct contact, can also include the first and second features not be directly to connect
It touches but passes through the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature right over second feature and oblique upper, or to be merely representative of fisrt feature level height special higher than second
Sign.Fisrt feature second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward
Side, or be merely representative of fisrt feature level height and be less than second feature.
Above disclosure provides many different embodiments or example is used for realizing embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, above the component of specific examples and setting are described.When
So, they are merely examples, and is not intended to limit the present invention.In addition, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition are for purposes of simplicity and clarity, itself not indicate to be begged for
By the relationship between various embodiments and/or setting.In addition, the various specific techniques that embodiments of the present invention provide
With the example of material, but make those of ordinary skill in the art may realize that the application of other techniques and/or other materials
With.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the present invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, include according to involved function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (system of such as computer based system including processing module or other can be from instruction
Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any can include, store, communicating, propagating or
Transmission program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment
Device.The more specific example (non-exhaustive list) of computer-readable medium includes following：With one or more wiring
Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can be for example by carrying out optical scanner to paper or other media, then into edlin, interpretation or when necessary with it
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or combination thereof come real
It is existing.In the above-described embodiment, multiple steps or method can use storage in memory and by suitable instruction execution system
The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used
Any one of following technology or their combination well known to domain are realized：With for realizing logic function to data-signal
The discrete logic of logic gates, the application-specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that realize all or part of step that above-described embodiment method carries
Suddenly it is that relevant hardware can be instructed to complete by program, the program can be stored in a kind of computer-readable storage medium
In matter, which includes the steps that one or a combination set of embodiment of the method when being executed.
In addition, each functional unit in various embodiments of the present invention can be integrated in a processing module, also may be used
To be that each unit physically exists alone, can also two or more units be integrated in a module.It is above-mentioned integrated
The form that hardware had both may be used in module is realized, can also be realized in the form of software function module.The integrated module
If being realized in the form of software function module and when sold or used as an independent product, a calculating can also be stored in
In machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (13)
1. a kind of Switching Power Supply, which is characterized in that including：
First rectification part, first rectification part include the first electrolytic capacitor, and first rectification part is used for described first
Rectification is carried out to output voltage when electrolytic capacitor is enabled；With
Second rectification part, second rectification part include the second electrolytic capacitor, and second rectification part is used for described first
Rectification is carried out to the output voltage when electrolytic capacitor fails.
2. Switching Power Supply as described in claim 1, which is characterized in that the Switching Power Supply further includes gating element, the choosing
Logical element is for gating first rectification part or second rectification part to enable first electrolytic capacitor or described the
Two electrolytic capacitors.
3. Switching Power Supply as claimed in claim 2, which is characterized in that the gating element includes relay, the relay
Including the first contact and the second contact, first electrolytic capacitor and first contact portion, second electrolytic capacitor
Device is connect with second electrolytic capacitor.
4. Switching Power Supply as claimed in claim 3, which is characterized in that when first electrolytic capacitor is effective, it is described after
Electric appliance is connected to when not powering on second contact, is connected to after the power is turned on first contact.
5. Switching Power Supply as claimed in claim 3, which is characterized in that when first electrolytic capacitor fails, it is described after
Electric appliance holding is connected to second contact.
6. Switching Power Supply as claimed in claim 4, which is characterized in that second electrolytic capacitor is powering on instantaneous charging.
7. Switching Power Supply as claimed in claim 2, which is characterized in that first rectification part further includes first resistor, second
Resistance and first switching element, the second resistance make to lead to the first switching element to enable first rectification for dividing
Portion.
8. Switching Power Supply as claimed in claim 7, which is characterized in that the first switching element includes diode and three poles
The anode of pipe, the base stage of the triode and the diode is connect, and the of the cathode of the diode and the second resistance
One end connects, and the emitter of the triode is connect with the second end of the second resistance, the collector of the triode and choosing
Logical element connection.
9. Switching Power Supply as claimed in claim 7, which is characterized in that second rectification part includes 3rd resistor, the 4th electricity
Resistance and second switch element, the 4th resistance make to lead to the second switch element to enable second rectification for dividing
Portion.
10. Switching Power Supply as claimed in claim 9, which is characterized in that the second switch element includes bidirectional thyristor.
11. switch element as claimed in claim 9, which is characterized in that make a reservation for when the ripple voltage of the output voltage is more than
When value, the second switch element conductive is to enable second rectification part, when the ripple voltage of the output voltage is less than institute
When stating predetermined value, the first switching element conducting is to enable first rectification part.
12. a kind of cooking equipment, which is characterized in that including such as claim 1-11 any one of them Switching Power Supply.
13. cooking equipment as claimed in claim 12, which is characterized in that the cooking equipment includes micro-wave oven.
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| CN201810387255.6A CN108365745B (en) | 2018-04-26 | 2018-04-26 | Switching power supply and cooking device |
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| CN201810387255.6A CN108365745B (en) | 2018-04-26 | 2018-04-26 | Switching power supply and cooking device |
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| CN108365745B CN108365745B (en) | 2020-06-05 |
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| CN108365745B (en) | 2020-06-05 |
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