CN208190512U - Switching power supply and cooking equipment - Google Patents
Switching power supply and cooking equipment Download PDFInfo
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- CN208190512U CN208190512U CN201820617305.0U CN201820617305U CN208190512U CN 208190512 U CN208190512 U CN 208190512U CN 201820617305 U CN201820617305 U CN 201820617305U CN 208190512 U CN208190512 U CN 208190512U
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Abstract
The utility model 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 rectify 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 rectify the output voltage in the failure of the first electrolytic capacitor.The invention also discloses a kind of cookers.The Switching Power Supply and cooking equipment of the utility model embodiment work in the failure of the first electrolytic capacitor by the way that the second electrolytic capacitor is arranged, to form the spare of the first electrolytic capacitor, effectively extend the service life of Switching Power Supply.
Description
Technical field
The utility model relates to household electrical appliance, in particular to a kind of Switching Power Supply and cooking equipment.
Background technique
Switching Power Supply has generally included electrolytic capacitor, however electrolytic capacitor has volatility and the longevity in hot operation
Life is shorter, causes Switching Power Supply service life easy to damage short, user often can not effectively judge whether electrolytic capacitor reaches use
Service life.
Utility model content
The embodiments of the present invention provides a kind of Switching Power Supply and cooking equipment.
The Switching Power Supply of the utility model embodiment, comprising:
First rectification part, first rectification part include the first electrolytic capacitor, and first rectification part is used for described
First electrolytic capacitor rectifies output voltage when enabled；With
Second rectification part, second rectification part include the second electrolytic capacitor, and second rectification part is used for described
First electrolytic capacitor rectifies the output voltage when failing.
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 are connect with first contact, second electrolytic capacitor and the second electrolysis electricity
Container connection.
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 powering on first contact.
In some embodiments, when first electrolytic capacitor fails, the relay is kept and described second
Contact connection.
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 for dividing to enable first rectification part.
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 to lead to the 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 greater 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 the utility model embodiment, including above-mentioned Switching Power Supply.
In some embodiments, the cooking equipment includes micro-wave oven.
The Switching Power Supply and cooking equipment of the utility model embodiment, by the way that the second electrolytic capacitor is arranged, first
Electrolytic capacitor works when failing, 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 utility model, will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
In description of the above-mentioned and/or additional aspect and advantage of the utility model from combination following accompanying drawings to embodiment
It will be apparent and be readily appreciated that, in which:
Fig. 1 is the structure block diagram of the Switching Power Supply of the utility model embodiment.
Fig. 2 is the circuit diagram of the Switching Power Supply of the utility model embodiment.
Fig. 3 is the service life of the electrolytic capacitor of the utility model embodiment and the relation curve of capacity and angle of loss.
Fig. 4 is the ripple voltage of the utility model embodiment with the schematic diagram using time change of electrolytic capacitor.
Specific embodiment
The embodiments of the present invention is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein
Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below
It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the embodiments of the present invention, and cannot understand
For the limitation to the embodiments of the present invention.
Fig. 1 and Fig. 2 are please referred to, the Switching Power Supply 100 of the utility model embodiment includes the first rectification part 10 and second
Rectification part 20.First rectification part 10 includes the first electrolytic capacitor 11, and the second rectification part 20 includes the second electrolytic capacitor 21.The
One rectification part 10 is for rectifying output voltage when the first electrolytic capacitor 11 enables.Second rectification part 20 is used for the
One electrolytic capacitor 11 rectifies output voltage by the second electrolytic capacitor 21 when failing.
The culinary art that the Switching Power Supply 100 of the utility model embodiment can be applied to the utility model embodiment is set
Standby, cooking equipment can be micro-wave oven or electromagnetic oven etc..In addition, Switching Power Supply 100 applies also for other household electrical appliance, specifically
With no restrictions.
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.Generally, 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 can equally generate capacitance loss when being stored at room temperature 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 continue to use Switching Power Supply
Replacement electrolytic capacitor 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, L0The volume of electrolytic capacitor when for maximum temperature
Determine the service life.
As electrolytic capacitor is increased using the time, 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 capacitor 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 ripple voltage bigger.Generally, when capacitor is greater than 330 μ F, internal resistance is basic
Equal to ESR.It can be seen that internal resistance increases with using the time to increase, ripple voltage increases.
In the utility model embodiment, the first rectification part 10 that is to say the circuit where the first electrolytic capacitor 11, when
When first electrolytic capacitor 11 enables, the first rectification part 10 is for rectifying output voltage.First electrolytic capacitor 11 makes
Can that is to say 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 electricity
When electrolysis condenser 11 can be used normally, the second electrolytic capacitor 21 is used as spare electrolytic capacitor, and normal storage is placed in switch
It, in some examples, can be to the charging that it is timed for the preservation service life for extending spare electrolytic capacitor in power supply 100.And
When the first electrolytic capacitor 11 failure that is to say that the second electrolytic capacitor 21 comes into force when reaching service life, where circuit
It is the second rectification part 20, for being rectified to output voltage.
It is to be appreciated that under same use environment, this is practical relative to the Switching Power Supply for only including an electrolytic capacitor
Novel is that the design of double electrolytic capacitors of embodiment effectively extends the service life of Switching Power Supply 100.Show at one
In example, control group Switching Power Supply only includes an electrolytic capacitor, and the capacitance of the electrolytic capacitor is 10 μ F, and the utility model is real
The Switching Power Supply 100 of mode is applied, the capacitance of the first electrolytic capacitor 11 is 10 μ F, and the capacitance of the second electrolytic capacitor 21 is
10 μ F, operating ambient temperature are 80 degrees Celsius.The electrolysis electrolytic capacitor service life of control group is 2.54, corresponding, this reality
With in the Switching Power Supply 100 of novel embodiment, the service life of the first electrolytic capacitor 11 is 2.54, in the first electrolytic capacitor
In 11 2.54 enabled, the capacity of 21 static capacity of the second electrolytic capacitor volatilization decaying 53%, under the same conditions, second
Electrolytic capacitor 21 can work on 2.02.Under identical working environment, the service life of Switching Power Supply 100 is 4.56, relatively
It is extended 2.02 in the Switching Power Supply of control group.
In another example, control group Switching Power Supply only includes an electrolytic capacitor, the capacitance of the electrolytic capacitor
For 10 μ F, the Switching Power Supply 100 of the utility model embodiment, the capacitance of the first electrolytic capacitor 11 is 10 μ F, the second electricity
The capacitance of electrolysis condenser 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, corresponding, in the Switching Power Supply 100 of the utility model embodiment, the service life of the first electrolytic capacitor 11 is
0.56, in 0.56 that the first electrolytic capacitor 11 enables, 21 static capacity of the second electrolytic capacitor volatilization decaying 32%
Capacity, under the same conditions, the second electrolytic capacitor 21 can work on 0.45.Under identical working environment, switch electricity
The service life in source 100 is 1.01, and 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 that electrolytic capacitor is appropriately extended
Service life need to use heat dissipation appropriate, such as increase heat dissipation element and inevitably to switch such as cooling fin or fan
The volume of power supply increases, and in the utility model embodiment, the conduct of the second electrolytic capacitor 21 is spare, even if in hot environment
In, it also can effectively extend the service life of Switching Power Supply 100 to a certain extent, therefore can be omitted heat dissipation element, be conducive to out
The Miniaturization Design in powered-down source simultaneously being capable of save the cost.
In conclusion the Switching Power Supply 100 and cooking equipment of the utility model embodiment, pass through setting the second electrolysis electricity
Container 21 works in the failure of the first electrolytic capacitor 11, to form the spare of the first electrolytic capacitor 11, effectively extends and open
The service life in powered-down source 100.Meanwhile be conducive to Switching Power Supply 100 Miniaturization Design and being capable of save the cost.
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 being located in two circuits
Electrolysis condenser connection, 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 above situation be the first electrolytic capacitor 11 effectively, when that is to say not up to service life, and
When the failure of the first electrolytic capacitor 11, relay keeps being connected to the second contact b after not powering on or powering 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
It closes parameter to determine, 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 electrical parameter of the first rectification part 10 determine, such as the partial pressure relationship of the first rectification part 10 and the second rectification part 20.
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 and second resistance 13 are connected in series, 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 the partial pressure of second resistance 12 is more than the conducting voltage of 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
The conducting of first rectification part 10, and when the arrival service life of the first electrolytic capacitor 11, the partial pressure of the 4th resistance 23 may make
The conducting of second rectification part 20, the work of the second electrolytic capacitor 21.
Preferably, second switch element 24 includes bidirectional thyristor.Bidirectional thyristor adapter tube includes the list of 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 is so that bidirectional thyristor is connected, to be that the contact of relay is maintained at the second contact a,
The conducting of second rectification part 20, the work of the second electrolytic capacitor 21.
Referring to Fig. 4, specifically, the use duration with the first electrolytic capacitor 11 increases, and service life shortens, hold
Amount reduces, and angle of loss tangent increases, and the ripple voltage in output voltage increases with it, 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
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, divides circuit according only to 11 Natural Attenuation of the first electrolytic capacitor
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, no setting is required in actual circuit design shows
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, Switching Power Supply 100 is instantaneous for as spare electrolytic capacitor what is powered on every time
Charging, when work, disconnect, and are conducive to 21 long-term preservation of the second electrolytic capacitor.
In some embodiments, the circuit design of the utility model embodiment can also be applied in addition to Switching Power Supply
Other need the technical field using electrolytic capacitor, such as vehicle-mounted industry, security industry, medical electronics, medium-and-large-sized electronics
The service life of circuit where the design of equipment etc., idle capacity and automatic switchover can effectively extend electrolytic capacitor.
In the description of the embodiments of the present invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ",
" length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom",
The orientation or positional relationship of the instructions such as "inner", "outside", " clockwise ", " counterclockwise " is that orientation based on the figure or position are closed
System is merely for convenience of description the embodiments of the present invention and simplifies description, rather than the device of indication or suggestion meaning
Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
The limitation of embodiment.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting 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 the embodiments of the present invention, the meaning of " multiple "
It is two or more, unless otherwise specifically defined.
In the description of the 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 being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, it can also
Indirectly connected through an intermediary, can be the connection inside two elements or the interaction relationship of two elements.For
For those skilled in the art, it can understand above-mentioned term in the embodiments of the present invention as the case may be
Concrete meaning.
In the embodiments of the present invention unless specifically defined or limited otherwise, fisrt feature is in second feature
"upper" or "lower" may include that the first and second features directly contact, may include the first and second features be not direct yet
It contacts but by the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and
" above " includes fisrt feature right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second
Feature.Fisrt feature includes that fisrt feature is immediately below second feature and oblique under the second feature " below ", " below " and " below "
Lower section, or first feature horizontal height is merely representative of less than second feature.
Above disclosure provides many different embodiments or example is used to realize the embodiments of the present invention
Different structure.In order to simplify the disclosure of the embodiments of the present invention, above to the component of specific examples and be arranged into
Row description.Certainly, they are merely examples, and purpose does not lie in limitation the utility model.In addition, the implementation of the utility model
Mode can in different examples repeat reference numerals and/or reference letter, this repetition be for purposes of simplicity and clarity,
The relationship between discussed various embodiments and/or setting itself is not indicated.In addition, the embodiments of the present invention mentions
The example of the various specific techniques and material that have supplied, but those of ordinary skill in the art may be aware that other techniques are answered
With and/or other materials use.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", specific examples 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 utility model.In this specification
In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, 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 preferred embodiments of the present invention includes other realization, wherein can not be by shown or discussion
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be by this
The embodiment person of ordinary skill in the field of utility model is 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 (such as computer based system, including the system of 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 may include, store, communicating, propagating or
Transfer 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 include the following: there are one or more wirings
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 then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the embodiments of the present invention can use hardware, software, firmware or their combination
To realize.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution
The software or firmware that system executes are realized.For example, in another embodiment, can be used if realized with hardware
Any one of following technology well known in the art or their combination are realized: being had for realizing logic function to data-signal
The discrete logic of the logic gates of energy, the 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 understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
In addition, can integrate in a processing module in each functional unit in each embodiment of the utility model,
It is also possible to each unit to physically exist alone, can also be integrated in two or more units in a module.Above-mentioned collection
At module both can take the form of hardware realization, can also be realized in the form of software function module.It is described integrated
If module is realized and when sold or used as an independent product in the form of software function module, also can store at one
In computer-readable storage medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (13)
1. a kind of Switching Power Supply characterized by comprising
First rectification part, first rectification part include the first electrolytic capacitor, and first rectification part is used for described first
Electrolytic capacitor rectifies output voltage when enabled；With
Second rectification part, second rectification part include the second electrolytic capacitor, and second rectification part is used for described first
Electrolytic capacitor rectifies the output voltage when failing.
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 is connect with first contact, 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 powering on first contact.
5. Switching Power Supply as claimed in claim 3, which is characterized in that first electrolytic capacitor failure when, 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 for dividing to enable first rectification
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 connection, the emitter of the triode are 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 for dividing to enable second rectification
Portion.
10. Switching Power Supply as claimed in claim 9, which is characterized in that the second switch element includes bidirectional thyristor.
11. Switching Power Supply as claimed in claim 9, which is characterized in that make a reservation for when the ripple voltage of the output voltage is greater 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 described in any item Switching Power Supplies of claim 1-11.
13. cooking equipment as claimed in claim 12, which is characterized in that the cooking equipment includes micro-wave oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820617305.0U CN208190512U (en) | 2018-04-26 | 2018-04-26 | Switching power supply and cooking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820617305.0U CN208190512U (en) | 2018-04-26 | 2018-04-26 | Switching power supply and cooking equipment |
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| CN208190512U true CN208190512U (en) | 2018-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365745A (en) * | 2018-04-26 | 2018-08-03 | 广东美的厨房电器制造有限公司 | Switching Power Supply and cooking equipment |
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2018
- 2018-04-26 CN CN201820617305.0U patent/CN208190512U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365745A (en) * | 2018-04-26 | 2018-08-03 | 广东美的厨房电器制造有限公司 | Switching Power Supply and cooking equipment |
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