CN208094448U - Electronic transformer and microwave cooking electric appliance - Google Patents

Abstract

The utility model discloses a kind of electronic transformers and microwave cooking electric appliance.Electronic transformer includes rectification module, transformer, switch module and control module.Rectification module connects alternating current source.Transformer connects rectification module.Switch module, which is arranged at, provides on-off signal to transformer.Control module connecting valve module.Control module is arranged at generates control signal to switch module to control the switching frequency of switch module according to predetermined power.In the electronic transformer of the frequency converter of the above embodiment; since switch module can provide on-off signal to transformer; it can play the role of protecting circuit when alternating current source is unstable in this way; in addition; due to the switching frequency of control module controllable switch module; electronic transformer is enable steadily to power to microwave generator in this way, and the electronic transformer low manufacture cost of present embodiment.

Description

Electronic transformer and microwave cooking electric appliance

Technical field

The utility model is related to household electrical appliance technical fields, more specifically, are related to a kind of electronic transformer and microwave is cooked It prepares food electric appliance.

Background technology

It in the micro-wave oven of the relevant technologies, is generally boosted by frequency converter to be powered to magnetron, and connects frequency conversion The voltage of the alternating current source of device is susceptible to fluctuation, and the power of such frequency converter output is unstable, is easy to cause frequency converter and is working When, occurs abnormal, and user experience is poor.

In addition, existing frequency converter needs setting communication module to be communicated with the controller of micro-wave oven, and frequency converter It needs constantly to adjust power, so that the cost of manufacture of frequency converter is high.

Utility model content

A kind of electronic transformer of the utility model embodiment offer and microwave cooking electric appliance.

The electronic transformer of the utility model embodiment includes：

Rectification module for connecting alternating current source；

Connect the transformer of the rectification module；

Switch module, the switch module, which is arranged at, provides on-off signal to the transformer；

The control module of the switch module is connected, the control module is arranged at generates control letter according to predetermined power Number to the switch module to control the switching frequency of the switch module.

In the electronic transformer of the above embodiment, since switch module can provide on-off signal to transformer, in this way may be used To play the role of protecting circuit when alternating current source is unstable, in addition, due to the switch frequency of control module controllable switch module Rate, so that electronic transformer can steadily provide output voltage, and the electronic transformer of present embodiment is fabricated to This is low.

In some embodiments, the control module includes detection module and processor, and the detection module is set In based on detecting the alternating current source to obtain detection signal, and the detection signal is sent to the processor, it is described Processor is arranged at the switching frequency that the switch module is controlled based on the detection signal.

In some embodiments, the control module includes driving circuit, and the driving circuit connects the switching molding Block and the processor, the driving circuit are arranged at described in the control signal control exported according to the processor and open Close the switching frequency of module.

In some embodiments, the electronic transformer includes the first sampling module, the first sampling module connection The output end of the alternating current source and the detection module, the detection module is arranged to be acquired by first sampling module The detection signal.

In some embodiments, the electronic transformer includes the second sampling module, the second sampling module connection The output end of the rectification module and the detection module, the detection module is arranged to be examined by second sampling module Survey the electric current of the transformer, the processor be arranged at the electric current according to the transformer, the alternating current source voltage and The predetermined power controls the switching frequency of the switch module.

In some embodiments, the electronic transformer includes the auxiliary transformer for connecting the control module, described Auxiliary transformer is arranged at the primary voltage for detecting the transformer, and the control module is arranged in the transformer When primary voltage is more than setting voltage, controls the switch module and disconnect.

In some embodiments, the electronic transformer includes third sampling module, the third sampling module connection The auxiliary transformer and the control module, the control module are arranged at by described in third sampling module detection The primary voltage of transformer.

In some embodiments, the control module includes accessory power supply, and the accessory power supply connects the auxiliary and becomes Depressor.

In some embodiments, the electronic transformer includes the switch for connecting the alternating current source and the rectification module Part, the control module, which is arranged at, controls the make-and-break time of the switch member to adjust the output of the transformer unit interval Power；Or the switch member is arranged at described in the PC control for the microwave cooking electric appliance applied by the electronic transformer The make-and-break time of switch member.

In some embodiments, the electronic transformer includes voltage doubling rectifier module, the voltage doubling rectifier module connection In the primary side of the transformer, the voltage doubling rectifier module is arranged at the output voltage for increasing the transformer.

In some embodiments, the transformer includes：

Armature winding, the winding width of the armature winding are more than the stack height of the armature winding；With

The winding width of the secondary windings separated with the armature winding, the secondary windings is less than the secondary windings Stack height, the switch module connect the armature winding.

In some embodiments, the transformer includes the bobbin of insulation, and the bobbin opens up spaced list A primary winding slot and single secondary rolling thread slot, the coiling of the armature winding are wound on the primary winding slot, it is described it is secondary around The coiling of group is wound on the secondary rolling thread slot.

In some embodiments, the winding width of the stack height of the secondary windings and the secondary windings meet with Lower relational expression, 1.1<H2/W2<2.5, H2 indicate that the stack height of the secondary windings, W2 indicate the winding of the secondary windings Width.

In some embodiments, the transformer includes：

The bobbin of insulation is provided with the first spacer on the inside pipe wall of the bobbin, and first spacer includes First spacer block and the second spacer block for connecting first spacer block, the thickness of second spacer block are spaced with described first The thickness of block differs；With

To two magnetic cores being inserted in the bobbin, one end of described two magnetic cores respectively by first spacer block or Second spacer block described in person separates.

In some embodiments, winding slot is formed on the outside of the bobbin, the transformer includes cap, described Cap covers the winding slot at least partly, and the cap includes the second interval corresponding with first spacer location Part, second spacer include third spacer block and connect the 4th spacer block of the third spacer block, the third interval The thickness of block is identical as the thickness of the first spacer block, the thickness of the thickness and second spacer block of the 4th spacer block Identical, when one end of described two magnetic cores is separated by first spacer block respectively, the other end of described two magnetic cores is distinguished It is separated by the third spacer block, it is described two when one end of described two magnetic cores is separated by second spacer block respectively The other end of magnetic core is separated by the 4th spacer block respectively.

In some embodiments, the transformer includes：

The bobbin of insulation is provided with the first spacer on the inside pipe wall of the bobbin, and first spacer includes First spacer block, the second spacer block and third spacer block, first spacer block are connected on the inside pipe wall of the bobbin, institute It states the second spacer block and the third spacer block is all connected with first spacer block, the thickness of first spacer block is less than described The thickness of the thickness of second spacer block and the third spacer block, the thickness of second spacer block and the third spacer block Thickness is different；With

To two magnetic cores being inserted in the bobbin, one end of described two magnetic cores respectively by first spacer block or Second spacer block described in person or the third spacer block separate.

In some embodiments, winding slot is formed on the outside of the bobbin, the transformer includes cap, described Cap winding slot described in covering part at least partly, the cap includes between first spacer location corresponding second Spacing body, second spacer include the 4th spacer block, the 5th spacer block and the 6th spacer block, the 5th spacer block and described 6th spacer block is all connected with the third spacer block, the thickness phase of the thickness and first spacer block of the 4th spacer block Together, the thickness of the 5th spacer block is identical as the thickness of the second spacer block, the thickness of the 6th spacer block with it is described The thickness of third spacer block is identical；

When one end of described two magnetic cores is separated by first spacer block respectively, the other end point of described two magnetic cores It is not separated by the 4th spacer block, when one end of described two magnetic cores is separated by second spacer block respectively, described two The other end of a magnetic core is respectively by the 5th spacer block every in one end of described two magnetic cores respectively by the third spacer block When separating, the other end of described two magnetic cores is separated by the 6th spacer block respectively.

The utility model embodiment also provides a kind of microwave cooking electric appliance.Microwave cooking electric appliance includes any of the above-described implementation The electronic transformer and microwave generator of mode.The electronic transformer connects the microwave generator.

In the microwave cooking electric appliance of the above embodiment, on-off signal is provided to transformation since switch module is arranged at Device can play the role of protecting circuit in this way when alternating current source is unstable, in addition, due to control module controllable switch module Switching frequency, so that electronic transformer can steadily provide output voltage, and the microwave cooking electricity of present embodiment The low manufacture cost of device.

In some embodiments, the microwave cooking electric appliance includes host computer, and the host computer connects the electronics and becomes Depressor, the host computer are arranged at the input for receiving and being set based on frequency and instruct and input instruction is sent to the electricity Sub- transformer, the control module are arranged at the output power that the electronic transformer is controlled according to the input instruction；Or The host computer is arranged at the input for receiving and being set based on frequency and instructs and control the electricity according to input instruction The output power of sub- transformer.

The additional aspect and advantage of the embodiment of the utility model will be set forth in part in the description, partly will be from Become apparent in following description, or is recognized by the practice of the embodiment of the utility model.

Description of the drawings

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, wherein：

Fig. 1 is the circuit diagram of the electronic transformer of the utility model embodiment.

Fig. 2 is the module diagram of the microwave cooking electric appliance of the utility model embodiment.

Fig. 3 is the schematic cross-section of the transformer of the utility model embodiment.

Fig. 4 is the schematic cross-section of transformer in the related technology.

Fig. 5 is another schematic cross-section of transformer in the related technology.

Fig. 6 is the winding structure schematic diagram of the transformer of the utility model embodiment.

Fig. 7 is the structural schematic diagram of the first spacer of the utility model embodiment.

Fig. 8 is another structural schematic diagram of the first spacer of the utility model embodiment.

Fig. 9 is another schematic cross-section of the transformer of the utility model embodiment.

Figure 10 is that structure when the first spacer of the transformer of the utility model embodiment removes the second spacer block is shown It is intended to.

Figure 11 is the part-structure schematic diagram of the transformer of the utility model embodiment.

Figure 12 is the structural schematic diagram of the second spacer of the utility model embodiment.

Figure 13 is another structural schematic diagram of the second spacer of the utility model embodiment.

Figure 14 is another structural schematic diagram of the first spacer of the utility model embodiment.

Figure 15 is schematic cross-section of the first spacer in Figure 14 along L-L lines.

Figure 16 is the another schematic cross-section of the transformer of the utility model embodiment.

Figure 17 is the part-structure schematic diagram of the transformer of the utility model embodiment.

Structure when Figure 18 is the first spacer removal third spacer block of the transformer of the utility model embodiment is shown It is intended to.

Figure 19 is that the first spacer of the transformer of the utility model embodiment removes the second spacer block and third interval Structural schematic diagram when block.

Figure 20 is the another structural schematic diagram of the second spacer of the utility model embodiment.

Figure 21 is another structural schematic diagram of the second spacer of the utility model embodiment.

Figure 22 is the structural schematic diagram of the microwave cooking electric appliance of the utility model embodiment.

Main element symbol description：

Microwave cooking electric appliance 200, electronic transformer 100, rectification module 10, transformer 20, switch module 30, switching tube 32, resonant capacitance 34, control module 40, detection module 42, processor 44, driving circuit 46, accessory power supply 48, alternating current source 50, Filter module 60, filter capacitor 62, filter inductance 64, the first sampling module 70, first resistor 72, second resistance 74, second are adopted Egf block 80,3rd resistor 82, third sampling module 90, the 4th resistance 92, the 5th resistance 94, switch member 110, voltage multiplying rectifier mould It is block 120, the first multiplication of voltage diode 122,124, first times of the second multiplication of voltage diode, 126, second times of voltage capacitance voltage capacitance 128, auxiliary Help transformer 130, microwave generator 210, host computer 220, control panel 230.

Specific implementation mode

The embodiment of the utility model is described below in detail, the example of 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 the utility model, and should not be understood as to the utility model Limitation.

In the description of the embodiment of the utility model, term " first ", " second " are used for description purposes only, and cannot It is interpreted as indicating or implies relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " the One ", the feature of " second " can explicitly or implicitly include one or more feature.In the reality of the utility model In the description for applying mode, the meaning of " plurality " is two or more, unless otherwise specifically defined.

In the description of the embodiment of the utility model, 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 directly connected, can also can be indirectly connected through an intermediary the company inside two elements Logical or two elements interaction relationship.For the ordinary skill in the art, can understand as the case may be Concrete meaning of the above-mentioned term in the embodiment of the utility model.

Following disclosure provides many different embodiments or example is used for realizing the embodiment of the utility model Different structure.In order to simplify the utility model embodiment disclosure, hereinafter 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 embodiment of the utility model carries The example of the various specific techniques and material that have supplied, but answering those of ordinary skill in the art may realize that other techniques With and/or other materials use.

Referring to Fig. 1, the electronic transformer 100 of the utility model embodiment includes rectification module 10, transformer 20, opens Close module 30 and control module 40.Rectification module 10 is for connecting alternating current source 50.Transformer 20 connects rectification module 10.Switching molding Block 30, which is arranged at, provides on-off signal to transformer 20.40 connecting valve module 30 of control module.Control module 40 is set In the switching frequency for controlling switch module 30 to switch module 30 according to predetermined power generation control signal.

In the electronic transformer 100 of the above embodiment, since switch module 30 provides on-off signal to transformer 20, this Sample can play the role of protecting circuit when alternating current source 50 is unstable, in addition, since control module 40 controls switch module 30 Switching frequency, so that electronic transformer 100 can steadily provide output voltage, and the electronic transformer of present embodiment The low manufacture cost of device 100.

Specifically, rectification module 10 includes the full-wave rectifying circuit of four diodes composition.Rectification module 10 can will be handed over The alternating voltage that stream source 50 generates is converted to DC voltage.It should be noted that in one example, the friendship that alternating current source 50 generates Galvanic electricity pressure is about 220V, and frequency is about 50HZ.It is appreciated that rectification module 10 also can be used the circuits of other forms without It is limited to forming by four diodes.

Further, electronic transformer 100 further includes filter module 60, and filter module 60 connects rectification module 10 and transformation Device 20.Filter module 60 includes filter capacitor 62 and filter inductance 64.One end ground terminal of filter capacitor 62.Pass through filter capacitor 62 and filter inductance 64 anti-interference ability of electronic transformer 100 can be improved, and electronic transformer 100 can also be reduced to it The interference of his equipment.

It should be noted that in the present embodiment, transformer 20 can be high frequency transformer 20.High frequency transformer 20 is work Working frequency is more than the power transformer 20 of intermediate frequency (10kHz).High frequency transformer 20 includes primary coil (such as the example of lower Fig. 3 In armature winding 510, Fig. 9 example in armature winding 6141 and Figure 16 example in armature winding 7141) and it is secondary Coil is (for example, secondary windings 6143 in the example of secondary windings 520 and Fig. 9 in the example of lower Fig. 3 and in the example of Figure 16 Secondary windings 7143).What high frequency transformer 20 transmitted is high-frequency pulse square wave signal.The control signal that control module 40 generates It can be high-frequency signal, be greater than the signal of 10kHz.

Switch module 30 includes switching tube 32 and resonant capacitance 34.The base stage link control module 40 of switching tube 32, switch One end of one end and resonant capacitance 34 of the primary coil of the collector connection transformer 20 of pipe 32, the emitter of switching tube 32 connect Connect rectification module 10, the other end and rectification module 10 of the primary coil of the other end connection transformer 20 of resonant capacitance 34.It is whole Flow module 10 export DC voltage after the effect of switching tube 32, resonant capacitance 34 and transformer 20 inversion be 20KHZ extremely The high-frequency ac voltage of 50KHZ.When switching tube 32 is connected, electric energy can be made to be stored in the first of transformer 20 by resonant capacitance 34 To maintain the voltage of transformer 20 in grade coil, when switching tube 32 disconnects, transformer 20 with 34 phase mutual resonance of resonant capacitance so that The voltage of the collector of switching tube 32 when being connected next time of switching tube 32 is obtained since 0V, switching tube 32 is reduced so as to play The effect of switching loss.

It should be pointed out that switching tube 32 can be IGBT (Insulated Gate Bipolar Transistor), insulation Grid bipolar transistor), driving circuit 46 drives IGBT to be switched on or off.

In some embodiments, on-off signal is synchronous with the switching frequency of switch module 30, for example, switch module When 30 opening (conducting), switch module 30, which provides, connects signal to transformer, and transformer is made to work；Switch module 30 is closed (disconnected Open) when, switch module 30 provides interrupt signal to transformer 20, and transformer 20 is made to be stopped.

The predetermined power of electronic transformer 100 can be pre-set power, when the voltage of alternating current source 50 fluctuates, Control module 40 can generate control signal to switch module 30 to control the turn-on time of switching tube 32.When the conducting of switching tube 32 Between it is longer, the switching frequency of switching tube 32 is lower so that the output current of the emitter of switching tube 32 also just it is smaller.? That is in the case where control module 40 is worked with predetermined power, it, can when the voltage of alternating current source 50 occurs fluctuation and increases To control the switching frequency of switch module 30 according to predetermined power to control the emitter of switching tube 32 by control module 40 Output current, so that electronic transformer 100 maintains constant output power to reach electronic transformer within the unit interval 100 predetermined power.

In the utility model embodiment, electronic transformer 100 is different from common transformer, and electronic transformer 100 has Itself output power can be stablized according to the environmental variance (voltage fluctuation of such as alternating current source) and predetermined power that detect by having The function of control signal without external control device.

It is appreciated that in some embodiments, the electronic transformer 100 of present embodiment need not be with microwave cooking electricity Device 200 is communicated, and compared with the existing technology, communication module need not be arranged, and electronic transformer 100 is made so as to reduce Cost of manufacture.

Need to illustrate says, the electronic transformer 100 in present embodiment need not continuously adjust electronics change on a large scale The power of the work of depressor 100, input electronic transformer 100 is only maximum power and zero energy input by user, that is to say, that The electronic transformer 100 of present embodiment for existing frequency converter, can reduce in order to adapt to adjustment power this Partial cost of manufacture.

In some embodiments, control module 40 includes detection module 42 and processor 44, and detection module 42 is set In based on detecting alternating current source 50 to obtain detection signal, and detection signal is sent to processor 44, processor 44 is set It is placed in the switching frequency based on detection Signal-controlled switch module 30.

In this way, the voltage that alternating current source 50 is detected by detection module 42 controls the switching frequency of switch module 30 in time, this Sample makes electronic transformer 100 that can keep stable output power within the unit interval.

Specifically, processor 44 can be MCU (Microcontroller Unit, micro-control unit).Processor 44 can be with The detection signal acquired to detection module 42 is handled and is analyzed, when detection module 42 detects the voltage hair of alternating current source 50 When raw fluctuation, processor 44 can make corresponding processing to control the switching frequency of switch module 30.

In some embodiments, control module 40 includes driving circuit 46,46 connecting valve module of driving circuit, 30 He Processor 44, driving circuit 46 are arranged at the switch frequency of the control Signal-controlled switch module 30 exported according to processor 44 Rate.

In this way, the control signal that processor 44 exports can control the switch frequency of switch module 30 by driving circuit 46 Rate, so that circuit structure is simple.

Specifically, the detection signal that processor 44 can be detected according to detection module 42 generates corresponding pulse-width signal (PWM, Pulse Width Modulation), and driving circuit 46 can receive the pulsewidth modulation letter sent out from processor 44 Number the turn-on time of switching tube 32 is controlled, to change the switching frequency of switching tube 32.It should be noted that in an example In, pulse-width signal is the pulse that each pulse width is equal, and the period by changing spike train can adjust output frequency Rate, the width or duty ratio for changing pulse can adjust output voltage, that is to say, that can make voltage using suitable control method Change with frequency coordination, control electronic transformer 100 is reached so as to the duty ratio in period, PWM by adjusting PWM The purpose of electric current.

In some embodiments, electronic transformer 100 includes the first sampling module 70, and the connection of the first sampling module 70 is handed over The output end and detection module 42 in stream source 50, detection module 42 are arranged at through 70 acquisition testing signal of the first sampling module.

In this way, the working condition of alternating current source 50 can be accurately obtained by the first sampling module 70, so that detection Module 42 more accurately obtains the working condition of electronic transformer 100.

Specifically, the first sampling module 70 includes first resistor 72 and second resistance 74.One end of first resistor 72 connects Alternating current source 50 and rectification module 10, the other end connect second resistance 74 and detection module 42.One end of second resistance 74 connects Alternating current source 50 and rectification module 10, the other end connect first resistor 72 and detection module 42.In this way, detection module 42 passes through One resistance 72 and second resistance 74 can detect the voltage of alternating current source 50.

In some embodiments, electronic transformer 100 includes the second sampling module 80, and the second sampling module 80 connects whole The output end and detection module 42 of flow module 10, detection module 42 is arranged at detects transformer 20 by the second sampling module 80 Electric current, processor 44 be arranged at the electric current according to transformer 20, the voltage of alternating current source 50 and predetermined power control switching molding The switching frequency of block 30.

In this way, can quickly and accurately detect the electric current of transformer 20, the knot of circuit by the second sampling module 80 Structure is simple.

Specifically, the second sampling module 80 includes 3rd resistor 82, one end connection rectification module 10 of 3rd resistor 82 Output end and ground terminal, the emitter and detection module 42 of other end connecting valve pipe 32.Detection module 42 is flowed through by detection The electric current of 3rd resistor 82, so as to detect the electric current of transformer 20.Processor 44 can be examined according to described in detection module 42 When the conducting of the predetermined power adjustment switching tube 32 of the electric current of the transformer 20 measured, the voltage of alternating current source 50 and control module 40 Between, so that the electric current of transformer 20 is adjusted when the voltage of alternating current source 50 fluctuates, so that control remains default Power is constant, and then but also output power of the transformer 20 within the unit interval maintains to stablize.

In some embodiments, electronic transformer 100 includes the auxiliary transformer 130 of link control module 40, auxiliary Transformer 130 is arranged at the primary voltage of detection transformer 20, and control module 40 is arranged at the primary electrical in transformer 20 When pressure is more than setting voltage, control switch module 30 disconnects.

In this way, the primary voltage of transformer 20 can be quickly detected by auxiliary transformer 130, and rapid feedback is to control Molding block 40, circuit structure is simple.

Specifically, in the utility model embodiment, control module 40 includes detection module 42 and processor 44, and auxiliary becomes The voltage of depressor 130 relationship proportional to the primary voltage of transformer 20, such as proportional relationship.Also it just says, detection module The voltage of 42 detection auxiliary transformers 130, and the voltage of auxiliary transformer 130 is transferred to processor 44, processor 44 is according to auxiliary The proportionate relationship of the voltage of transformer 130 and the primary voltage of transformer 20 is helped to would know that the primary voltage of transformer 20.Meanwhile It is more than setting voltage in the primary voltage of transformer 20, processor 44 can make controllable switch mould after corresponding processing and analysis The switching tube 32 of block 30 disconnects, so as to play the role of protecting transformer 20 and switching tube 32.

Further, auxiliary transformer 130 be connected to transformer 20 primary side may make transformer 20 output stablize, and And it is connected to winding coil and insulating materials needed for the primary side of transformer 20 relative to auxiliary transformer 130, it is connected to change The auxiliary transformer 130 of 20 primary side of depressor can reduce the cost of transformer 20, reduce the size of transformer 20.

In some embodiments, electronic transformer 100 includes third sampling module 90, and third sampling module 90 connects auxiliary Transformer 130 and control module 40, control module 40 is helped to detect the primary voltage of transformer 20 by third sampling module 90.

In this way, can quickly and accurately detect the primary voltage of transformer 20, circuit knot by third sampling module 90 Structure is simple.

Specifically, in the utility model embodiment, control module 40 includes detection module 42 and processor 44, and third is adopted Egf block 90 include the 4th resistance 92 and the 5th resistance 94, the 4th resistance 92 one end connection auxiliary transformer 130 one end and Processor 44, other end connecting detection module 42.One end of one end connection auxiliary transformer 130 of 5th resistance 94 and processing Device 44, other end connecting detection module 42.Detection module 42 can be detected quickly by the 4th resistance 92 and the 5th resistance 94 To the voltage of auxiliary transformer 130.

In some embodiments, control module 40 includes accessory power supply 48, and accessory power supply 48 connects auxiliary transformer 130.In this way, accessory power supply 48 can provide power supply by auxiliary transformer 130 to control module 40.

Specifically, processor 44 by accessory power supply 48 be separately connected the 4th resistance 92 one end and the 5th resistance 94 one End.Meanwhile 48 connection processing device 44 of accessory power supply, the sustainable other moulds for giving processor 44 or control module 40 of accessory power supply 48 Block or circuit or element provide power supply.

In some embodiments, accessory power supply 48 may include voltage-stablizer, rectifier diode and capacitance etc., rectifier diode The output voltage of auxiliary transformer 130 is switched into DC voltage to capacitor charging, the voltage of capacitance is stablized by voltage-stablizer at some Numerically, such as 18V and/or 5V, stabilizer output voltage can be provided at processor 44 and driving circuit 46, such as 5V supplies Device 44 is managed, 18V is provided to driving circuit 46.

In some embodiments, electronic transformer 100 includes the switch member of connection alternating current source 50 and rectification module 10 110, control module 40 is arranged at the make-and-break time of control switch member 110 to adjust the output work of the unit interval of transformer 20 Rate.

In this way, by the make-and-break time of control switch member 110 to adjust the output power of the unit interval of transformer 20, this Sample is efficient, and transformer 20 is made to maintain to stablize in the output power of unit interval, and circuit structure is simple.

Specifically, in one example, switch member 110 is relay, preferably electromagnetic relay.Electromagnetic relay is general It is made of iron core, coil, armature and contact reed etc..After coil both ends are plus certain voltage, one can be flowed through in coil Fixed electric current, to generate galvanomagnetic-effect, armature will overcome the pulling force of return spring to be drawn under the action of electromagnetic attracting force Iron core, to which the movable contact with moving armature and stationary contact (normally opened contact) are attracted, relay is closed.After coil blackout, electromagnetism Suction also disappear therewith, armature will return to original position in the reaction force of spring, make movable contact and original stationary contact Point (normally-closed contact) discharges, and relay disconnects.It is attracted and discharges in this way, to reach the mesh of conducting in circuit, cut-out 's.And in the utility model embodiment, the make-and-break time by controlling relay can control 20 unit interval of transformer Output power.That is, when the break-make of relay 110 according to the input power of user, within the unit interval, can be controlled Between than can make transformer 20 export user set by setting power.

It should be noted that the input power or setting power of user can be identical as the predetermined power of electronic transformer 100 Or it is different, user herein refers to ordinary consumer rather than the maintenance personal of profession.The input power or setting power of user Refer to user to input by button on electric appliance or input interface or the power of setting, and the default work(of electronic transformer 100 Rate is the power not changed by the input of user or setting, and the predetermined power of electronic transformer 100 can be that electric appliance or electronics become The constant power set when dispatching from the factory of depressor 100.It is appreciated that when electric appliance or electronic transformer 100 are repaired, maintenance personal The predetermined power of electronic transformer 100 can be changed by maintenance device, but in user's normal use electric appliance, usually without Method changes the predetermined power of electronic transformer 100.

In one embodiment, the predetermined power of electronic transformer 100 is 1000W, and the input power of user is 800W. In the utility model embodiment, the predetermined power of electronic transformer 100 will not change with the input power of user Become, that is to say, that electronic transformer 100 still can control switch member 110 according to 1000W.But in order to reach use The 800W of family setting can only control the make-and-break time of switch member 110 to control electronic transformer 100 by electronic transformer 100 Output power, switch member 110 connect when electronic transformer 100 output power be 1000W, switch member 110 disconnect when electronics The output power of transformer 100 is 0W, for example, within the unit interval (such as 10S), control switch member 110 connects 8S, disconnects 2S, Then within the unit interval (10S), the average value of the output power of electronic transformer 100 is 800W, that is to say, that in the unit interval The output power of electronic transformer 100 can be equal to the input power or setting power of user.

In some embodiments, switch member 110 is arranged at the microwave cooking electric appliance applied by electronic transformer 100 200 host computer 220 controls the make-and-break time of switch member 110.

Specifically, in one example, the predetermined power of electronic transformer 100 is 1000W, and the input power of user is 800W.The predetermined power of electronic transformer 100 will not change with the input power of user.In order to reach user setting 800W, the host computer 220 of microwave cooking electric appliance 200 controls the make-and-break time of switch member 110 to control electronic transformer 100 Output power.For example, within the unit interval (such as 10S), the host computer 220 of microwave cooking electric appliance 200 controls switch member 110 and connects 8S disconnects 2S, then within the unit interval (10S), the average value of the output power of electronic transformer 100 is 800W, that is to say, that The output power of electronic transformer 100 can be equal to the input power or setting power of user in unit interval.

It should be noted that the output power of electronic transformer can be understood as the input power inputted with user's operation one It causes, and the pre-set power of control module that the predetermined power of electronic transformer 100 is electronic transformer.

In some embodiments, electronic transformer 100 includes voltage doubling rectifier module 120, and voltage doubling rectifier module 120 connects In the primary side of transformer 20, voltage doubling rectifier module 120 is arranged at the output voltage for increasing transformer 20.

In this way, the output voltage of transformer 20 can be made to double by voltage doubling rectifier module 120, circuit structure is simple.

Specifically, voltage doubling rectifier module 120 includes the first multiplication of voltage diode 122,124, first times of the second multiplication of voltage diode Voltage capacitance 126 and second times of voltage capacitance 128.First multiplication of voltage diode 122 and the second multiplication of voltage diode 124 are connected in series with.First Times voltage capacitance 126 and second times of voltage capacitance 128 are connected in series with.First multiplication of voltage diode 122 and the second multiplication of voltage diode 124 composition Circuit and first times of voltage capacitance 126 and the circuit in parallel that forms of second times of voltage capacitance 128 connect.One secondary of transformer 20 One end of coil is connected between the first multiplication of voltage diode 122 and the second multiplication of voltage diode 124, and the other end is connected to the first multiplication of voltage Between capacitance 126 and second times of voltage capacitance 128.In addition, another secondary coil of transformer 20 can connect power load, such as Microwave generator 210.

In some embodiments, referring to Fig. 3, transformer 20 includes armature winding 510 and secondary windings 520.It is secondary Winding 520 is separated with armature winding 510.The winding width W1 of armature winding 510 is more than the stack height H1 of armature winding 510, That is W1>H1.The winding width W2 of secondary windings 520 is less than the stack height H2, i.e. W2 of secondary windings 520<H2, switch module 30 Connect armature winding 510.

In transformer 20 in the above embodiment, since the winding width W1 of armature winding 510 is more than armature winding 510 Stack height H1, and the winding width W2 of secondary windings 520 be less than armature winding 510 stack height H1, so that But also the structure of transformer 20 is simplified and miniaturization while transformer 20 can be maintained at a suitable coupling efficiency, and this The transformer 20 of embodiment is without carrying out wire jumper slot design, without the magnetic gap precision for excessively high requiring transformer 20.

Specifically, transformer 20 includes two magnetic cores 530 to inserting, on the one hand, the magnetic gap width between two magnetic cores 530 The coupling efficiency of transformer 20 is influenced, on the other hand, transformer 20 is easy to influence transformer 20 around line width and winding height Coupling efficiency, transformer 20 during use, preferably stablize between 0.5-1.2 by coupling efficiency.

In the related technology at one, referring to Fig. 4, transformer 300 is by armature winding 1, secondary windings 2 and heater winding 3 are constituted.It is provided with magnetic gap 5 between two magnetic cores 4.Armature winding 1, secondary windings 2 and heater winding 3 are arranged in transformer In 300 width direction, i.e., arranged on the left and right directions of Fig. 4.The winding transverse width (W1) and armature winding 1 of armature winding 1 The relationship of stack height (H1) be：W1≥H1.The winding transverse width (W2) of secondary windings 2 and the stacking of secondary windings 2 are high Degree (H2) relationship be：W2≥H2.In the example of fig. 4, due to the cross-sectional area of the winding transverse width (W2) of secondary windings 2 It is larger, therefore coiling is complex when producing, for ensure coiling effect generally require to be configured multiple winding slot positions 9 and Complete to need to carry out when coiling wire jumper to the continuation coiling of another winding slot position 9 in one winding slot position 9.On the one hand increase in this way and becomes Difficulty is arranged in the skeleton of depressor 300, on the other hand, when due to batch production, when wire jumper when generally requires to consume more Between, and then affect the production efficiency of transformer 300.In addition, if being not provided with multiple winding slot positions 9, based on production work at present Skill is easy when coiling, around dislocation, to generate corona effect, to influence the stability of transformer 300.

Another in the related technology, referring to Fig. 5, transformer 400 by armature winding 1, secondary windings 2 and heater around Group 3 is constituted.It is provided with magnetic gap 5 between two magnetic cores 4.Armature winding 1, secondary windings 2 and heater winding 3 are arranged in transformer In 300 width direction, i.e., arranged on the left and right directions of Fig. 5.The winding transverse width (W1) of armature winding 1 and armature winding The relationship of stack height (H1) is：H1 > W1.The stack height of winding transverse width (W2) and primary and secondary winding of secondary windings 2 (H2) relationship is：H2 > W2.In the example of hgure 5, although the cross-sectional area of armature winding 1 and secondary windings 2 is smaller and nothing Corresponding multiple slot positions need to be set and is not in around wrong phenomenon, still, when the winding transverse width (W1) and secondary of armature winding 1 When the winding transverse width (W2) of winding 2 all reduces, magnetic gap 5 needs progress direct proportion accordingly to adjust, to the precision to magnetic gap 5 It is required that high.Therefore, magnetic gap 5 is put in medium position between armature winding 1 and secondary windings 2 by the transformer of Fig. 5, is reached herein Higher matching efficiency, while decreasing the Adjustment precision of magnetic gap 5.But such structure has the difficulty of specification production precision Problem.

In addition, in such as transformer of Fig. 5, since the stack height H1 of armature winding 1 is relatively high, and H1>W1 makes in this way The voltage difference obtained between the minimum wire winding layer and highest wire winding layer of armature winding 1 is larger, is easy to cause armature winding in this way Dielectric breakdown, to reduce the service life of transformer.And in the transformer of the utility model embodiment 20, due to H1 <W1, so that H1 is smaller, it is not easy to which there is a phenomenon where dielectric breakdowns, specifically, referring to Fig. 6, in an embodiment In, the voltage of the most bottom wire winding layer L1 wire winding layers of coiling group is 0, with the raising of the number of plies, such as from L1->L2->L3->L4-> L5->L6->L7->L8->L9->The voltage of L10, wire winding layer gradually increase, since H1 is smaller so that L1 wire winding layers and highest around Voltage difference between line layer L10 wire winding layers is smaller, then does not allow it is easier that there is a phenomenon where dielectric breakdown between each wire winding layer, Be conducive to improve the service life of transformer 20.

In addition, in the present embodiment, referring to Fig. 3, magnetic gap 550 is biased to armature winding 510, so that transformer 20 Coupling efficiency be easily adjusted, and the coupling efficiency of transformer 20 can be stablized 0.5 to 1.2 or so, so that transformer 20 Performance demand can be met, and relatively low to the required precision of magnetic gap, such structure has met Current specifications production Precision reduces production difficulty and cost.

Further more, in the present embodiment, since the winding width W2 of secondary windings 520 is less than the stacking of secondary windings 520 Height H2, in this way in the structure design of transformer 20, the cross-sectional area of secondary windings 520 is smaller, and present embodiment Secondary windings coiling when need not carry out wire jumper, so that the structure of transformer is simplified and miniaturization, while can reduce Production difficulty and improve production efficiency.

Further, referring to Fig. 3, in some embodiments, transformer 20 includes the bobbin 540 of insulation, coiling Pipe 540 opens up spaced single primary winding slot 542 and single secondary rolling thread slot 544, and the coiling of armature winding 510 is wound on just Grade winding slot 542, the coiling of secondary windings 520 are wound on secondary rolling thread slot 544.

In this way, the winding of the transformer 20 of present embodiment need not carry out wire jumper when carrying out coiling, so as to drop The production difficulty and raising production efficiency of low transformer 20.

Specifically, relative to Fig. 4, in the present embodiment, bobbin 540 only opens up single secondary rolling thread slot 544, and So that the stack height H2 for being less than secondary windings 520 around line width W2 for the secondary windings 520 being wound on secondary rolling thread slot 544, While voltage difference in this way between the wire winding layer for maintaining secondary windings 520 is in suitable range, it can make transformer 20 structure is simplified and minimizes, and need not carry out wire jumper when coiling, can reduce the difficulty of production in this way, improves production Efficiency.It should be noted that although 20 secondary windings of transformer only opens up single secondary rolling thread slot 544 in the present embodiment, But the design of present embodiment can overcome the problems, such as in production technology so that the transformer 20 of present embodiment remains to meet The requirement of technologic requirement and performance.

In some embodiments, the winding width W2 of the stack height H2 of secondary windings 520 and secondary windings 520 meets Following relationship, 1.1<H2/W2<2.5, H2 indicate that the stack height of secondary windings 520, W2 indicate the winding of secondary windings 520 Width.

So, so that secondary windings 520 disclosure satisfy that the demand of the performance of transformer 20.

It is appreciated that since the stack height H2 of secondary windings 520 and the winding width W2 satisfactions of secondary windings 520 are following Relational expression, 1.1<H2/W2<2.5, so that the voltage difference between each wire winding layer of secondary windings 520 can maintain one A suitable range.Preferably, the stack height H2 of secondary windings 520 can be secondary windings 520 winding width W2 1.2 to 2 times.It should be noted that in actual production, specific numerical value or number can be obtained according to the magnetic gap precision of production line It is worth range.In the case where keeping the ratio of H2 and W2 to meet between 1.1 and 2.5, if W2's needs to be designed smaller, Then magnetic gap 550 can be designed smaller, but to the required precision of magnetic gap 550 with regard to relatively high.Likewise, keep H2 with In the case that the ratio of W2 is met between 1.1 and 2.5, if W2's needs to be designed bigger, magnetic gap 550 can be set Count bigger, but to the required precision of magnetic gap 550 with regard to relatively low.Referring to Fig. 3, in some embodiments, transformer 20 include two magnetic cores 530 to inserting, and bobbin 540 includes spacer 546, and one end of each magnetic core 530 is located at bobbin 540 It is interior and bear against the both sides opposite in spacer 546.

In this way, by spacer 546 so that two disclosure satisfy that magnetic gap 550 to plug in magnetic core 530, so that transformer 20 coupling efficiency is able to maintain that in suitable range.

Specifically, two bear against the both sides opposite in spacer 546 to plug in magnetic core 530, so that two magnetic Magnetic gap 550 can be formed between core 30, so that the magnetic gap of transformer 20 can satisfy the use demand.It should be noted that The quantity of spacing body 546 can be two, and a spacer 546 is used to separate one end of two magnetic cores 530, another spacer 546 other end for separating two magnetic cores 530.

In some embodiments, transformer 20 includes Filament Winding 560, and bobbin 540 offers filament coil slot 545, secondary rolling thread slot 544 is located between filament coil slot 545 and primary winding slot 542, and the coiling of Filament Winding 560 is wound on lamp Filament winding wire casing 545.In this way, external microwave generator can be connected by Filament Winding 560, so as to be supplied to microwave generator Electricity.

In some embodiments, Fig. 7 to Fig. 9 is please referred to, transformer 20 includes the bobbin 610 and two magnetic cores of insulation 620.Two magnetic cores 620 are to being inserted in bobbin 610.The first spacer 612 is provided on the inside pipe wall 611 of bobbin 610, the One spacer 612 includes the second spacer block 6124 of the first spacer block 6122 of the first spacer block 6122 and connection, the second spacer block The thickness D1 of 6124 thickness D2 and the first spacer block 6122 are differed.One end of two magnetic cores 620 is respectively by the first spacer block 6122 or second spacer block 6124 separate.

In the transformer 20 of the above embodiment, due to bobbin 610 be internally provided with thickness it is of different sizes first Spacer block 6122 and the second spacer block 6124, and two magnetic cores 620 can be resisted against the first spacer block according to actual demand 6122 or second spacer block 6124 with adjust two magnetic cores 620 between gap size, to allow transformer 20 to meet The demand of different size or model, whole so that the cost of transformer 20 is relatively low, production efficiency is higher.

Specifically, in one example, the bobbin 610 of insulation can be resin material.Magnetic core 620 can be copper core or iron Core etc..

Specifically, in the related art, two of transformer need to be kept according to actual demand between plug in magnetic core Preset gap, so that transformer can meet default magnetic gap requirement.Two magnetic cores will produce whirlpool during remagnetization ground Stream loss, and magnetic gap advantageously reduces eddy-current loss.In addition, the coupling efficiency of transformer is related to the size of magnetic gap, at the same also with The coiling stack height of winding is related to around line width size.That is, in order to enable transformation to keep a suitable coupling Conjunction rate, can be by adjusting the coiling stack height of magnetic gap or winding between two magnetic cores and around the size of line width.? In present embodiment, since two magnetic cores 620 of present embodiment can be by the first spacer block 6122 or the second spacer block 6124 separate, so that transformer 20 can meet the needs of different size or model, and can enable transformer 20 Enough meet different coupling efficiency demands.

It should be noted that in the example of fig. 8, the thickness D1 of the first spacer block 6122 is less than the second spacer block 6124 Thickness D2 can connect when the gap between two magnetic cores 620 of transformer 20 needs to meet the thickness D2 of the second spacer block 6124 One end of two magnetic cores 620 is abutted directly against to the both sides (see Figure 11) of the second spacer block 6124, at this point, the first spacer block 6122 Still it is connect with the second spacer block 6124.When the gap between two magnetic cores 620 of transformer 20 needs to meet the first spacer block When 6122 thickness D1, the connection of the first spacer block 6122 and the second spacer block 6124 can be interrupted, for example, directly wipe out, with The second spacer block 6124 is set to be detached from transformer 20, it is opposite that two such magnetic core 620 can abut directly against the first spacer block 6122 Both sides (see Figure 10).

Fig. 9, Figure 12 and Figure 13 are please referred to, the outside of bobbin 610 is formed with winding slot 614, and transformer 20 includes cap 630, cap 630 covers winding slot 614 at least partly, and cap 630 includes between corresponding with 612 position of the first spacer second Spacing body 632, the second spacer 632 include third spacer block 6322 and connect the 4th spacer block 6324 of third spacer block 6322, The thickness D3 of third spacer block 6322 is identical as the thickness D1 of the first spacer block 6122, the thickness D4 of the 4th spacer block 6324 and The thickness D2 of two spacer blocks 6124 is identical, when one end of two magnetic cores 620 is separated by the first spacer block 6122 respectively, two magnetic The other end of core 620 is separated by third spacer block 6322 respectively, in one end of two magnetic cores 620 respectively by the second spacer block 6124 When separating, the other end of two magnetic cores 620 is separated by the 4th spacer block 6324 respectively.

In this way, by the first spacer block 6122 and third spacer block 6322 to separate the both ends of two magnetic cores 620 or logical The second spacer block 6124 and the 4th spacer block 6324 are crossed to separate the both ends of two magnetic cores 620, transformer 20 can in this way met The demand of different size or model, whole so that the cost of transformer 20 is relatively low, production efficiency is higher.

It should be pointed out that the first spacer block 6122 can be consistent with the shapes and sizes of third spacer block 6322 or differs It causes.Second spacer block 6124 can be consistent or inconsistent with the shapes and sizes of the 4th spacer block 6324.In one embodiment, First spacer block 6122 is used to separate one end of two magnetic cores 620, and third spacer block 6322 is used to separate the another of two magnetic cores 620 One end.In another embodiment, the second spacer block 6124 is used to separate one end of two magnetic cores 620, the 4th spacer block 6324 other end for separating two magnetic cores 620.First spacer 612 is located at the center clearance A of bobbin 610.Between second Spacing body 632 is located at the side interval B of cap 630.

Referring to Fig. 7, in some embodiments, the first spacer 612 includes interconnecting piece 6126, interconnecting piece 6126 connects First spacer block 6122 and the second spacer block 6124, relative to the first spacer block 6122, the second spacer block 6124 is closer to coiling The center of pipe 610, the thickness D2 of the second spacer block 6124 are more than the thickness D1 of the first spacer block 6122, and the first spacer block 6122 is set The inside pipe wall 611 in bobbin 610 is set, the thickness of interconnecting piece 6126 is less than the thickness D1 of the first spacer block 6122.

In this way, connecting the first spacer block 6122 and the second spacer block 6124, and interconnecting piece 6126 by interconnecting piece 6126 Thickness be less than the first spacer block 6122, so that need to meet in two magnetic cores 620 is 6122 thickness of the first spacer block When the gap of D1, the connection of the second spacer block 6124 and interconnecting piece 6126 can be disconnected so that the second spacer block 6124 is rapidly separated Transformer 20.

Preferably, the range of the thickness D1 of the first spacer block 6122 can be 1.3mm to 1.7mm.Second spacer block 6124 The range of thickness D2 can be 1.8mm to 2.2mm.

Specifically, in some embodiments, the first spacer block 6122 can be in integrally continuous cyclic annular and between second Spacer block 6124 and be arranged.Second spacer block 6124 can be a solid disk.Since the first spacer block 6122 is arranged in bobbin 610 Inside pipe wall 611, and the second spacer block 6124 is closer to the center of bobbin 610, needs to meet when two magnetic cores 620 in this way When the gap of the thickness D2 of the second spacer block 6124, can one end of two magnetic cores 620 be directly resisted against the second spacer block 6124 Opposite both sides, at this point, the first spacer block 6122 is not in direct contact with magnetic core 620, that is to say, that the first spacer block 6122 is simultaneously Do not play the role of being spaced magnetic core 620.And when two magnetic cores 620 need the gap for meeting the thickness D1 of the first spacer block 6122 When, the interconnecting piece 6126 of the first spacer block 6122 of connection and the second spacer block 6124 directly can be quickly interrupted so that the second interval Block 6124 is detached from transformer 20, and one end of two such magnetic core 620 can be resisted against the inside pipe wall 611 being arranged in bobbin 610 The opposite both sides of first spacer block 6122.

Referring to Fig. 9, in some embodiments, winding slot 614 includes primary winding slot 6142 and secondary rolling thread slot 6144, transformer 20 includes around the armature winding 6141 for being located at primary winding slot 6142 and around time for being located at secondary rolling thread slot 6144 Grade winding 6143.So, so that the structure of transformer 20 is simple.

Specifically, armature winding 6141 and secondary windings 6143 can by the higher copper conductor of conductivity and aluminum conductor coiling and At.In some embodiments, armature winding 6141 and secondary windings 6143 may respectively be laminar winding.Laminar winding construction is tight It gathers, production efficiency is high.

In some embodiments, in some embodiments, 4 to Figure 16 are please referred to Fig.1, transformer 20 includes insulation Bobbin 710 and two magnetic cores 720.Two magnetic cores 720 are to being inserted in bobbin 710.It is set on the inside pipe wall 711 of bobbin 710 It is equipped with the first spacer 712.First spacer 712 includes the first spacer block 7122, the second spacer block 7124 and third spacer block 7123.First spacer block 7122 is connected on the inside pipe wall 711 of bobbin 710.Second spacer block 7124 and third spacer block 7123 are all connected with the first spacer block 7122.The thickness D1 of first spacer block 7122 is less than the thickness D2 and the of the second spacer block 7124 The thickness D3 of three spacer blocks 7123.The thickness D2 of second spacer block 7124 is different from the thickness D3 of third spacer block 7123.Two By the first spacer block 7122, either the second spacer block 7124 or third spacer block 7123 separate respectively for one end of magnetic core 720.

In the transformer 20 of the above embodiment, due to bobbin 710 be internally provided with thickness it is of different sizes first Spacer block 7122, the second spacer block 7124 and third spacer block 7123, and two magnetic cores 720 can be supported according to actual demand Lean against the first spacer block 7122 either the second spacer block 7124 or third spacer block 7123 to adjust between two magnetic cores 720 Gap size, the needs of to allow transformer 20 to meet different size or model, it is whole so that transformer 20 cost compared with Low, production efficiency is higher.

Specifically, in one example, the bobbin 710 of insulation can be resin material.Magnetic core 720 can be copper core or iron Core etc..

Specifically, in the related art, two of transformer need to be kept according to actual demand between plug in magnetic core Preset magnetic gap, so that transformer can meet default magnetic gap requirement.Two magnetic cores will produce whirlpool during remagnetization ground Stream loss, and magnetic gap advantageously reduces eddy-current loss.In addition, the coupling efficiency of transformer is related to the size of magnetic gap, at the same also with The coiling stack height of winding is related to around line width size.That is, in order to enable transformation to keep a suitable coupling Conjunction rate, can be by adjusting the coiling stack height of magnetic gap or winding between two magnetic cores and around the size of line width.? In present embodiment, since two magnetic cores 720 of present embodiment can be by the first spacer block 7122 or the second spacer block 7124 or third spacer block 7123 separate, so that transformer 20 can meet the needs of different size or model, also It is to say, in the case where not increasing cost, the first spacer 712 of present embodiment is adapted to the transformation of three kinds of different characteristics Device 20, and transformer 20 can be made to disclosure satisfy that different coupling efficiency demands.

It should be noted that in the example of fig. 15, the thickness D1 of the first spacer block 7122 is less than the second spacer block 7124 Thickness D2 and third spacer block 7123 thickness D3, the thickness D2 of the second spacer block 7124 is less than the thickness of third spacer block 7123 Spend D3.

Preferably, the range of the thickness D1 of the first spacer block 7122 can be 1.4mm to 1.7mm, the second spacer block 7124 The range of thickness D2 can be 1.9mm to 2.2mm, and the range of the thickness D3 of third spacer block 7123 can be 2.4mm to 2.7mm.

Specifically, in some embodiments, the first spacer block 7122 can be in integrally continuous cyclic annular and between second Spacer block 7124 and third spacer block 7123 and be arranged.Second spacer block 7124 may include two intervals substantially in solid sector disk Block, and third spacer block 7123 may also comprise two spacer blocks substantially in solid sector disk.Two of second spacer block 7124 Two spacer blocks of spacer block and third spacer block 7123 are arranged along the circumferential alternate intervals of bobbin, and the second spacer block 7124 and third spacer block 7123 be surrounded by a discontinuous cyclic structure.It is appreciated that in other embodiments, second Spacer block 7124 or single spacer block, third spacer block 7123 or single spacer block.

It, can when the magnetic gap between two magnetic cores 720 of transformer 20 needs the thickness D3 for meeting third spacer block 7123 One end of two magnetic cores 720 is abutted directly against to the both sides (see Figure 17) of third spacer block 7123, at this point, the first spacer block 7122 It is still connect with third spacer block 7123 with the second spacer block 7124.

It, can when the magnetic gap between two magnetic cores 720 of transformer 20 needs to meet the thickness D2 of the second spacer block 7124 With the connection (if having) of disconnection (such as cutting) third spacer block 7123 and the second spacer block 7124, and disconnect third spacer block 7123 and first spacer block 7122 connection, to make third spacer block 7123 be detached from the first spacer 712, at this point, can will One end of two magnetic cores 720 abuts directly against the both sides of the second spacer block 7124 (see Figure 18).

It, can when the magnetic gap between two magnetic cores 720 of transformer 20 needs to meet the thickness D1 of the first spacer block 7122 With the connection (if having) of disconnection (such as cutting) third spacer block 7123 and the first spacer block 7122, and disconnect the second spacer block 7124 and first spacer block 7122 connection, to make the second spacer block 7124 and third spacer block 7123 simultaneously from the first interval Part 712 detaches, at this point, one end of two magnetic cores 720 can be abutted directly against to the both sides of the first spacer block 7122 (see Figure 19).

4 are please referred to Fig.1, in some embodiments, the first spacer 712 includes first connecting portion 7125, the first connection Portion 7125 includes the first connector 71252 and the second connector 71254, and the first connector 71252 connects the first spacer block 7122 With the second spacer block 7124, the second connector 71254 connects the first spacer block 7122 and third spacer block 7123.

In this way, by the connection function of the first connector 71252 and the second connector 71254, the second spacer block can be made 7124 and third spacer block 7123 be fixed on the first spacer block 7122, and can make second by disconnecting the first connector 71252 Spacer block 7124 is rapidly separated the connection with the first spacer block 7122, and the second connector 71254 of disconnection can make third spacer block 7123 are rapidly separated the connection with the first spacer block 7122, easy to operate.

4 are please referred to Fig.1, in some embodiments, the quantity of the first spacer block 7122 is multiple.Multiple first spacer blocks 7122 being provided at circumferentially spaced along bobbin 710.The quantity of first connector 71252 is multiple.Each first connector 71252 Connect 7122 and second spacer block 7124 of each first spacer block.The quantity of second connector 71254 is multiple.Each second connects Fitting 71254 connects each first spacer block 7122 and third spacer block 7123.

In this way, the manufacturing cost of the first spacer 712 can be made to reduce and be easy 71252 He of the first connector in this way Second connector 71254 disconnects.

Specifically, in one example, multiple first spacer blocks 7122 are uniformly arranged along the circumferentially-spaced of bobbin 710, It can make 7124 uniform force of the second spacer block in this way.Multiple first spacer blocks 7122 form an intermittent cyclic structure. For example, in the example depicted in fig. 14, the quantity of the first spacer block 7122 is 4, and 4 the first spacer blocks 7122 are along bobbin 710 circumferentially-spaced 90 degree of settings.The quantity of second spacer block 7124 is 2, and the quantity of third spacer block 7123 is also 2, Second spacer block 7124 is arranged with 7123 alternate intervals of third spacer block is formed by cyclic annular knot in multiple first spacer blocks 7122 Among structure.Pre-determined distance is kept between each second spacer block 7124 and each third spacer block 7123 of adjacent spaces setting, The radian of each second spacer block 7124 is 90 degree, and the radian of each third spacer block 7123 is also 90 degree.

Further, horizontally disposed 2 the first spacer blocks 7122, the first connector 71252 and the second spacer block 7124 Same level can be located at.2 the first spacer blocks 7122, the second connector 71254 and the third spacer block 7123 arranged vertically Same vertical plane can be located at.

In some embodiments, the first spacer 712 includes second connecting portion 7127, the connection of second connecting portion 7,127 the Two spacer blocks 7124 and third spacer block 7123.

In this way, the second spacer block 7124 and third spacer block 7123 can be made to link together by second connecting portion 7127, So that the structure of the first spacer 712 is relatively stablized.

Specifically, second connecting portion 7127 can be located at the center of the first spacer 712.4 and Figure 15 is please referred to Fig.1, In some embodiments, second connecting portion 7127 includes multiple third connectors 71272, multiple 4th connector, 71274 and 5th connector 71276, third connector 71272 and the 4th connector 71274 are alternately connected to the along the circumferential of bobbin 710 The side of five connectors 71276, each third connector 71272 connect the second spacer block 7124 and the 5th connector 71276, often A 4th connector 71274 connection third spacer block 7123 and the 5th connector 71276.

In this way, may make between second by third connector 71272, the 4th connector 71274 and the 5th connector 71276 Spacer block 7124 and third spacer block 7123 link together, simple in structure, and by cutting third connector 71272 or the Four connectors 71274 may make the second spacer block 7124 and third spacer block 7123 quickly to disconnect.

Structure or square structure specifically, the 5th connector 71276 assumes diamond in shape, and third connector 71272 and the 4th connects Fitting 71274 can be in strip structure.The quantity of third connector 71272 is 2, and the quantity of the 4th connector 71274 is 2.2 A third connector 71272 is connected to two corner locations on a diagonal line of the 5th connector 71276,2 Four connectors 71274 are connected to two corner locations on another diagonal line of the 5th connector 71276.It is formed in this way Second connecting portion 7127 can provide more uniform connecting strength to the first spacer 712.

In one embodiment, it disconnects the first connector 71252 and third connector 71272 may make the second spacer block 7124 detach from the first spacer 712, and also disconnect the second connector 71254 and the 4th connector 71274 so that third Spacer block 7123 is detached from the first spacer 712, can one end of two magnetic cores 720 be abutted directly against the first spacer block at this time 7122 opposite both sides (see Figure 19).

In another embodiment, it disconnects the second connector 71254 and the 4th connector 71274 may make third interval Block 7123 is detached from the first spacer 712, at this point, can the second spacer block be abutted directly against for one end of two magnetic cores 720 7124 opposite both sides (see Figure 18).

In yet another embodiment, the second spacer block 7124 and third spacer block 7123 are connected by second connecting portion 7127 It is connected together, at this point, one end of two magnetic cores 720 can be abutted directly against to the opposite both sides of third spacer block 7123 (see figure 17)。

In some embodiments, the thickness of first connecting portion 7125 is not more than the thickness D1 of the first spacer block 7122, the The thickness of two interconnecting pieces 7127 is no more than thickness smaller in the second spacer block 7124 and third spacer block 7123.

So, so that the first spacer block 7122, the second spacer block 7124 and third spacer block 7123 play interval and make With, it prevents interconnecting piece thicker and touches one end of magnetic core 720, and influence the distance of two 720 one end of magnetic core.

It is appreciated that the thickness of first connecting portion 7125 is not more than the thickness D1 of the first spacer block 7122, that is to say, that In one example, the thickness of first connecting portion 7125 can be equal to the thickness D1 of the first spacer block 7122, or in another example In son, the thickness of first connecting portion 7125 can be less than the thickness D1 of the first spacer block 7122.The thickness of second connecting portion 7127 No more than thickness smaller in the second spacer block 7124 and third spacer block 7123, that is to say, that in one example, second connects The thickness of socket part 7127 can be equal to thickness smaller in the second spacer block 7124 and third spacer block 7123, or at another In example, the thickness of second connecting portion 7127 is less than thickness smaller in the second spacer block 7124 and third spacer block 7123.It needs It is noted that the setting of spacer block and interconnecting piece thickness and the setting of position be in order to ensure two magnetic cores 720 separate by Spacer block is realized, and the connection between spacer block is realized by interconnecting piece.And the smaller interconnecting piece of thickness also allows for disconnecting Operation when portion.

In some embodiments, second connecting portion 7127 is located at multiple first spacer blocks 7122 and is formed by cyclic structure Center, the second spacer block 7124 and third spacer block 7123 surround second connecting portion 7127.In this way, the structure of the first spacer It is simple and stable, it is integrally not easy to deform, ensures efficiency when transformer 100 assembles, and be easy so that the second spacer block 7124 and third spacer block 7123 disconnect.

6, Figure 20 and Figure 21 is please referred to Fig.1, in some embodiments, the outside of bobbin 710 is formed with winding slot 714.Transformer 20 includes cap 730, the covering part winding slot 714 at least partly of cap 730.Cap 730 includes and first Corresponding second spacer in 712 position of spacer 732.Second spacer 732 includes the 4th spacer block 7322, the 5th spacer block 7324 and the 6th spacer block 7326.5th spacer block 7324 and the 6th spacer block 7326 are all connected with third spacer block 7123.4th The thickness D4 of spacer block 7322 is identical as the thickness D1 of the first spacer block 7122.Between the thickness D5 and second of 5th spacer block 7324 The thickness D2 of spacer block 7124 is identical.The thickness D6 of 6th spacer block 7326 is identical as the thickness D3 of third spacer block 7123.

When one end of two magnetic cores 720 is separated by the first spacer block 7122 respectively, the other end difference of two magnetic cores 720 It is separated by the 4th spacer block 7322.When one end of two magnetic cores 720 is separated by the second spacer block 7124 respectively, two magnetic cores 720 other end respectively by the 5th spacer block 7324 every.It is separated respectively by third spacer block 7123 in one end of two magnetic cores 720 When, the other end of two magnetic cores 720 is separated by the 6th spacer block 7326 respectively.

In this way, by the first spacer block 7122 and the 4th spacer block 7322 to separate the both ends of two magnetic cores 720 or logical The second spacer block 7124 and the 5th spacer block 7324 are crossed to separate the both ends of two magnetic cores 720 or by third spacer block 7123 and the 6th spacer block 7326 to separate the both ends of two magnetic cores 720, transformer 20 can be made to meet different size or type in this way Number demand, whole so that the cost of transformer 20 is relatively low, production efficiency is higher.

It should be pointed out that the first spacer block 7122 can be consistent with the shapes and sizes of the 4th spacer block 7322 or differs It causes.Second spacer block 7124 can be consistent or inconsistent with the shapes and sizes of the 5th spacer block 7324.7123 He of third spacer block The shapes and sizes of 6th spacer block 7326 can be consistent or inconsistent.In one embodiment, the first spacer block 7122 is used for One end of two magnetic cores 720 is separated, the 4th spacer block 7322 is used to separate the other end of two magnetic cores 720.In another implementation In mode, the second spacer block 7124 is used to separate one end of two magnetic cores 720, and the 5th spacer block 7324 is for separating two magnetic cores 720 other end.In yet another embodiment, third spacer block 7123 is used to separate one end of two magnetic cores 720, between the 6th Spacer block 7326 is used to separate the other end of two magnetic cores 720.First spacer 712 is located in bobbin 710 by two magnetic cores 720 One end be formed by center magnetic gap A.Second spacer 732 is located at the side of cap 730 by the other end institute of two magnetic cores 720 The interval B of formation.

6 are please referred to Fig.1, in some embodiments, the outside of bobbin 710 is formed with winding slot 714, winding slot 714 Including primary winding slot 7142 and secondary rolling thread slot 7144, the transformer 20 includes around the primary for being located at primary winding slot 7142 Winding 7141 and around the secondary windings 7143 for being located at secondary rolling thread slot 7144.So, so that the structure of transformer 20 is simple.

Specifically, armature winding 7141 and secondary windings 7143 can by the higher copper conductor of conductivity and aluminum conductor coiling and At.In some embodiments, armature winding 7141 and secondary windings 7143 may respectively be laminar winding.Laminar winding construction is tight It gathers, production efficiency is high.In present embodiment, primary winding slot 7142 is single, and secondary rolling thread slot 7144 includes three sub- coilings Slot.

Referring to Fig. 2, the utility model embodiment also provides a kind of microwave cooking electric appliance 200.Microwave cooking electric appliance 200 Electronic transformer 100 including any of the above-described embodiment and microwave generator 210.Electronic transformer 100 connects microwave Device 210.

In the microwave cooking electric appliance 200 of the above embodiment, since switch module 30 can provide on-off signal to transformer 20, it can play the role of protecting circuit in this way when alternating current source 50 is unstable, in addition, due to 40 controllable switch of control module The switching frequency of module 30, so that electronic transformer 100 can steadily output voltage to microwave generator 210, and this The low manufacture cost of the microwave cooking electric appliance 200 of embodiment.

Specifically, microwave generator 210 includes magnetron.Magnetron is a kind of electrovacuum device being used for generating microwave energy Part.Magnetron is a diode being placed in stationary magnetic field.Electronics in magnetron is in orthogonal stationary magnetic field and perseverance It under the control for determining electric field, interacts with electromagnetic field of high frequency, obtaining energy from the output power of electronic transformer 100 It is transformed into microwave energy, to achieve the purpose that generate microwave energy.

In some embodiments, microwave cooking electric appliance 200 includes host computer 220, and host computer 220 connects electronic transformer 100, host computer 220 is arranged at reception and is instructed based on the input that frequency is set and send control signals to electronic transformer 100, control module 40 is arranged at the output power that control electronic transformer 100 is instructed according to input.

In this way, microwave cooking electric appliance 200 can be instructed according to the input of user to control the output work of electronic transformer 100 Rate, operation is flexible, and user experience is good.

Specifically, host computer 220 can be the control panel 230 or computer board of microwave cooking electric appliance 200, control panel 230 or electricity Button is provided on brain plate, user can input the output power of the microwave cooking electric appliance 200 of setting with operation button.Certainly, Host computer 220 is not limited to the above embodiment, and other embodiments can be selected according to actual demand.For example, upper Machine 220 can be by wired or the input power of user is wirelessly sent to electronic transformer 100.

Specifically, in one embodiment, the predetermined power of electronic transformer 100 is 1000W, and user passes through host computer The output power 800W of the microwave cooking electric appliance 200 of 220 input settings.Within the unit interval (such as 10S), the place of control module 40 It manages device 44 and controls the connection 8S of switch member 110, disconnect 2S, then within the unit interval (10S), the output power of electronic transformer 100 Average value be 800W, that is to say, that in the unit interval output power of electronic transformer 100 can be equal to user in microwave cooking The input power operated on electric appliance 200.

In some embodiments, when electronic transformer includes switch member 110, switch member 110 may be provided at control panel The input of user can be instructed and be sent to control mould in a wired or wireless manner by 230, electric-controlled plate or computer board, host computer 220 Block 40, control module 40 can send a control signal to control panel according to the input of user instruction by wired or wireless mode 230 or computer board, then control by control panel 230 or computer board the make-to-break ratio of switch member 110.

In some embodiments, host computer 220 is arranged at the input for receiving and being set based on frequency and instructed and according to defeated Enter the output power of instruction control electronic transformer 100.

In this way, host computer 220 can be directly according to the make-to-break ratio of the input instruction control switch member 110 of user, to rise To the output power effect of control electronic transformer 100.

In one example, the predetermined power of electronic transformer 100 is 1000W, and user is inputted defeated by host computer 220 It is 800W to enter power.Within the unit interval (such as 10S), host computer 220 controls switch member 110 and connects 8S, disconnects 2S, then in unit In time (10S), the average value of the output power of electronic transformer 100 is 800W, that is to say, that electronic transformer in the unit interval The output power of device 100 can be equal to the input power that user operates on microwave cooking electric appliance 200.It should be noted that electric The input power that the output power of sub- transformer 100 can be understood as with user is inputted by host computer 220 is consistent, and electronics becomes The predetermined power of depressor 100 is the pre-set power of control module of electronic transformer.

Figure 22 is please referred to, microwave cooking electric appliance 200 further includes cavity 130, door body (not shown) and fan 150.Cavity 130 Interior to be equipped with pallet 160, for placing food to be heated, door body is rotatably arranged in the front of cavity 130, is used for pallet 160 The opening of cavity 130 is opened or closed, microwave generator 110 is mounted on the outside of cavity 130 with transformer 20 and is set to wind The blowing direction of fan 150.When microwave cooking electric appliance 200 works, transformer 20 provides operating current to microwave generator 110, Microwave generator 110 generates the microwave energy for food in heating cavity 130.Meanwhile fan 150 is can absorb from the external world Air, and air-flow is formed, air-flow may pass through air duct conduction in transformer 20, and carry out cooling and heat dissipation to transformer 20, cold But after transformer 20, air-flow can be expelled to outside microwave cooking electric appliance 200 out of transformer 20 again.

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 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 press shown or discuss 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 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 (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 (control method), 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 the embodiment of the utility model can use hardware, software, firmware or combination thereof To realize.In the above-described embodiment, multiple steps or method can use storage in memory and by suitable instruction execution The software or firmware that system executes are realized.For example, if realized with hardware, in another embodiment, can use Any one of following technology well known in the art or their combination are realized：With for realizing logic work(to data-signal The discrete logic of the logic gates of energy, 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 each embodiment of the utility model can be integrated in a processing module, Can also be that each unit physically exists alone, can also two or more units be integrated in a module.Above-mentioned collection At module both may be used hardware form realize, can also be realized in the form of software function module.It is described integrated If module is realized in the form of software function module and when sold or used as an independent product, can also be stored in one In computer read/write memory medium.

Storage medium mentioned above can be read-only memory, disk or CD etc..

Although the embodiment of the utility model has been shown and described above, it is to be understood that above-mentioned embodiment party Formula is exemplary, and should not be understood as limiting the present invention, and those skilled in the art are in the utility model Above-mentioned implementation can be implemented in range to be changed, change, replace and modification.

Claims (19)

1. a kind of electronic transformer, which is characterized in that including：

Rectification module for connecting alternating current source；

Connect the transformer of the rectification module；

Switch module, the switch module, which is arranged at, provides on-off signal to the transformer；

The control module of the switch module is connected, the control module is arranged at generates control signal extremely according to predetermined power The switch module is to control the switching frequency of the switch module.

2. electronic transformer as described in claim 1, which is characterized in that the control module includes detection module and processing Device, the detection module are arranged at based on detecting the alternating current source to obtain detection signal, and by the detection signal It is sent to the processor, the processor is arranged at the switch frequency that the switch module is controlled based on the detection signal Rate.

3. electronic transformer as claimed in claim 2, which is characterized in that the control module includes driving circuit, the drive Dynamic circuit connects the switch module and the processor, the driving circuit are arranged at the institute exported according to the processor State the switching frequency that control signal controls the switch module.

4. electronic transformer as claimed in claim 2, which is characterized in that the electronic transformer includes the first sampling module, First sampling module connects the output end of the alternating current source and the detection module, and the detection module, which is arranged at, to be passed through First sampling module acquires the detection signal.

5. electronic transformer as claimed in claim 2, which is characterized in that the electronic transformer includes the second sampling module, Second sampling module connects the output end of the rectification module and the detection module, and the detection module is arranged at logical The electric current that second sampling module detects the transformer is crossed, the processor is arranged at the electricity according to the transformer Stream, the voltage of the alternating current source and the predetermined power control the switching frequency of the switch module.

6. electronic transformer as described in claim 1, which is characterized in that the electronic transformer includes connecting the control mould The auxiliary transformer of block, the auxiliary transformer are arranged at the primary voltage for detecting the transformer, the control module quilt It is set to when the primary voltage of the transformer is more than setting voltage, controls the switch module and disconnect.

7. electronic transformer as claimed in claim 6, which is characterized in that the electronic transformer includes third sampling module, The third sampling module connects the auxiliary transformer and the control module, the control module are arranged at by described Third sampling module detects the primary voltage of the transformer.

8. electronic transformer as claimed in claim 6, which is characterized in that the control module includes accessory power supply, described auxiliary Power supply is helped to connect the auxiliary transformer.

9. electronic transformer as described in claim 1, which is characterized in that the electronic transformer includes connecting the alternating current source With the switch member of the rectification module, the control module is arranged at that control the make-and-break time of the switch member described to adjust The output power of transformer unit interval；

Or the switch member is arranged at described in the PC control for the microwave cooking electric appliance applied by the electronic transformer The make-and-break time of switch member.

10. electronic transformer as described in claim 1, which is characterized in that the electronic transformer includes voltage doubling rectifier module, The voltage doubling rectifier module is connected to the primary side of the transformer, and the voltage doubling rectifier module, which is arranged at, increases the transformation The output voltage of device.

11. electronic transformer as described in claim 1, which is characterized in that the transformer includes：

Armature winding, the winding width of the armature winding are more than the stack height of the armature winding；With

The secondary windings separated with the armature winding, the winding width of the secondary windings are less than the stacking of the secondary windings Highly, the switch module connects the armature winding.

12. electronic transformer as claimed in claim 11, which is characterized in that the transformer includes the bobbin of insulation, institute It states bobbin and opens up spaced single primary winding slot and single secondary rolling thread slot, the coiling of the armature winding is wound on described The coiling of primary winding slot, the secondary windings is wound on the secondary rolling thread slot.

13. electronic transformer as claimed in claim 11, which is characterized in that the stack height of the secondary windings and described time The winding width of grade winding meets following relationship, and 1.1<H2/W2<2.5, H2 indicate the stack height of the secondary windings, W2 Indicate the winding width of the secondary windings.

14. electronic transformer as described in claim 1, which is characterized in that the transformer includes：

The bobbin of insulation, the first spacer is provided on the inside pipe wall of the bobbin, and first spacer includes first Spacer block and the second spacer block for connecting first spacer block, the thickness of second spacer block and first spacer block Thickness differs；With

To two magnetic cores being inserted in the bobbin, one end of described two magnetic cores is respectively by first spacer block or institute The second spacer block is stated to separate.

15. electronic transformer as claimed in claim 14, which is characterized in that it is formed with winding slot on the outside of the bobbin, The transformer includes cap, and the cap covers the winding slot at least partly, and the cap includes between described first Corresponding second spacer in spacing body position, second spacer include third spacer block and connect the of the third spacer block Four spacer blocks, the thickness of the third spacer block is identical as the thickness of the first spacer block, the thickness of the 4th spacer block It is identical as the thickness of the second spacer block, when one end of described two magnetic cores is separated by first spacer block respectively, institute The other end for stating two magnetic cores is separated by the third spacer block respectively, in one end of described two magnetic cores respectively by described second When spacer block separates, the other end of described two magnetic cores is separated by the 4th spacer block respectively.

16. electronic transformer as described in claim 1, which is characterized in that the transformer includes：

The bobbin of insulation, the first spacer is provided on the inside pipe wall of the bobbin, and first spacer includes first Spacer block, the second spacer block and third spacer block, first spacer block are connected on the inside pipe wall of the bobbin, and described Two spacer blocks and the third spacer block are all connected with first spacer block, and the thickness of first spacer block is less than described second The thickness of the thickness of spacer block and the third spacer block, the thickness of the thickness of second spacer block and the third spacer block It is different；With

To two magnetic cores being inserted in the bobbin, one end of described two magnetic cores is respectively by first spacer block or institute It states the second spacer block or the third spacer block separates.

17. electronic transformer as claimed in claim 16, which is characterized in that it is formed with winding slot on the outside of the bobbin, The transformer includes cap, and winding slot described in covering part, the cap include and described the cap at least partly Corresponding second spacer of one spacer location, second spacer include between the 4th spacer block, the 5th spacer block and the 6th Spacer block, the 5th spacer block and the 6th spacer block are all connected with the third spacer block, the thickness of the 4th spacer block Identical as the thickness of the first spacer block, the thickness of the 5th spacer block is identical as the thickness of the second spacer block, institute The thickness for stating the 6th spacer block is identical as the thickness of third spacer block；

When one end of described two magnetic cores is separated by first spacer block respectively, the other ends of described two magnetic cores respectively by 4th spacer block separates, when one end of described two magnetic cores is separated by second spacer block respectively, described two magnetic The other end of core by the third spacer block respectively by the 5th spacer block every being separated respectively in one end of described two magnetic cores When, the other end of described two magnetic cores is separated by the 6th spacer block respectively.

18. a kind of microwave cooking electric appliance, which is characterized in that including claim 1-17 any one of them electronic transformer and micro- Wave producer, the electronic transformer connect the microwave generator.

19. microwave cooking electric appliance as claimed in claim 18, which is characterized in that the microwave cooking electric appliance includes host computer, The host computer connects the electronic transformer, the host computer be arranged at reception instructed based on the input that frequency is set and incite somebody to action The input instruction is sent to the electronic transformer, and the control module is arranged at according to described in input instruction control The output power of electronic transformer；

Or the host computer is arranged at the input for receiving and being set based on frequency and instructs and instruct control according to the input The output power of the electronic transformer.