CN208189366U - Transformer, power supply unit and microwave cooking electric appliance - Google Patents

Abstract

The utility model discloses a kind of transformer, power supply unit and microwave cooking electric appliances.Transformer includes armature winding and secondary windings.Secondary windings is separated with armature winding.The winding width of armature winding is greater than the stack height of armature winding.The winding width of secondary windings is less than the stack height of secondary windings.In transformer in above embodiment, since the winding width of armature winding is greater than the stack height of armature winding, and the winding width of secondary windings is less than the stack height of secondary windings, transformer is able to maintain while a suitable coupling efficiency but also the structure of transformer is simplified and miniaturization, and the transformer of present embodiment is without carrying out wire jumper slot design, without excessively high requiring magnetic gap precision.

Description

Transformer, power supply unit and microwave cooking electric appliance

Technical field

The utility model relates to fields of home appliance technology, more specifically, are related to a kind of transformer, power supply unit and micro- Wave cooking appliance.

Background technique

In the related art, transformer includes armature winding, secondary windings and Insulated winding wire pipe, armature winding and it is secondary around Group is wound on bobbin.The coupling that influence transformer is easy around line width and winding height of armature winding and secondary windings Rate.

In order to adjust suitable coupling efficiency, the relevant technologies generally pass through the coiling stack height of setting winding, winding around Line width, transformer two magnetic cores between magnetic gap be adjusted.In a kind of scheme, magnetic gap is biased to armature winding, this The cross-sectional area of sample secondary windings is larger, therefore the coiling of secondary windings is complicated in production, in order to guarantee coiling effect often Need to be arranged multiple secondary rolling thread slots in primary side, the coiling of secondary windings needed when coiling between multiple secondary rolling thread slots into Row wire jumper will increase the skeleton setting difficulty and size of transformer in this way.Simultaneously as wire jumper is past when batch production transformer It is past to need to consume more time, and then influence production efficiency.In addition, if the primary side of transformer is not provided with multiple winding slots Position is based on current production technology, is easy when coiling, to generate corona effect, to influence the stability of transformer around mistake.Another In a kind of scheme, although the problem of secondary rolling thread slot wire jumper of secondary windings is not present, however, to ensure that the precision of coiling and Higher matching rate needs the position being placed on magnetic gap between armature winding and secondary windings, so as to the essence of magnetic gap The requirement of degree is high, increases production difficulty and cost.

Utility model content

The utility model embodiment provides a kind of transformer, power supply unit and microwave cooking electric appliance.

The transformer of the utility model embodiment includes:

Armature winding, the winding width of the armature winding are greater 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.

In transformer in above embodiment, since the winding width of armature winding is greater than the stacking of the armature winding Highly, and the winding width of secondary windings be less than the secondary windings stack height, so that transformer is able to maintain But also the structure of transformer is simplified and miniaturization while one suitable coupling efficiency, and the transformer of present embodiment without Wire jumper slot design need to be carried out, without excessively high requiring magnetic gap precision.

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 the stack height of the secondary windings, and W2 indicates the winding of the secondary windings Width.

In some embodiments, the transformer includes two to plug in magnetic core, and the bobbin includes spacer, often One end of a magnetic core is located in the bobbin and bears against the two sides opposite in the spacer.

In some embodiments, the transformer includes Filament Winding, and the bobbin offers filament coil slot, institute Secondary rolling thread slot position is stated between the filament coil slot and the primary winding slot, the coiling of the Filament Winding is wound on described Filament coil slot.

In some embodiments, the transformer includes the cover of insulation, covers the primary to the cover part Winding slot, the secondary rolling thread slot and the filament coil slot.

The utility model embodiment also provides a kind of power supply unit.Power supply unit includes rectification module and power modulus of conversion Block.Rectification module is for connecting alternating current source.Power conversion module connects the rectification module.The power conversion module includes upper State the transformer of any embodiment.

In power supply unit in above embodiment, since the winding width of armature winding is greater than the heap of the armature winding Folded height, and the winding width of secondary windings is less than the stack height of the secondary windings, so that and power supply unit can protect Structure simplification and miniaturization but also transformer, and the power supply of present embodiment are held while a suitable coupling efficiency Device is without carrying out wire jumper slot design, without excessively high requiring magnetic gap precision.

In some embodiments, the power conversion module includes control module and voltage doubling rectifier module, the control Module is connected to the primary side of the transformer, and the voltage doubling rectifier module is connected to the primary side of the transformer.

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 power supply unit and microwave generator of mode, the power supply unit connect the microwave generator.

In microwave cooking electric appliance in above embodiment, since the winding width of armature winding is greater than the armature winding Stack height, and the winding width of secondary windings be less than the secondary windings stack height, so that microwave cooking Electric appliance is able to maintain while a suitable coupling efficiency structure simplification and miniaturization but also microwave cooking electric appliance, and this The microwave cooking electric appliance of embodiment is without carrying out wire jumper slot design, without excessively high requiring magnetic gap precision.

The additional aspect and advantage of the embodiments of the present invention will be set forth in part in the description, partially will be from Become obvious in following description, or is recognized by the practice of the embodiments of the present invention.

Detailed description of the invention

In description of the above-mentioned and/or additional aspect and advantage of the utility model from combination following accompanying drawings to embodiment It will be apparent and be readily appreciated that, in which:

Fig. 1 is the schematic cross-section of the transformer of the utility model embodiment.

Fig. 2 is the winding structure schematic diagram of the transformer of the utility model embodiment.

Fig. 3 is the circuit diagram of the power supply unit of the utility model embodiment.

Fig. 4 is the structural schematic diagram of the microwave cooking electric appliance of the utility model embodiment.

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

Fig. 6 is another schematic cross-section of transformer in the related technology.

Main element symbol description:

Microwave cooking electric appliance 200, transformer 100, armature winding 10, secondary windings 20, magnetic core 30, bobbin 40, primary Winding slot 42, filament coil slot 45, spacer 46, default magnetic gap 50, Filament Winding 60, cover 70, supplies secondary rolling thread slot 44 Electric installation 110, rectification module 112, rectifier 1122, inductance 1124, first capacitor 1126, power conversion module 114, switching tube 115, diode 1152, semiconductor element 1154, the second capacitor 1144, current detecting unit 1146, control module 1147, multiplication of voltage Rectification module 1148, the first multiplication of voltage diode 1141, the second multiplication of voltage diode 1143, third capacitor 1145, third capacitor 1149, Alternating current source 116, microwave generator 120, cavity 130, fan 150, pallet 160.

Specific embodiment

The embodiments of the present invention 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 embodiments of the present invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", The orientation or positional relationship of the instructions such as "inner", "outside", " clockwise ", " counterclockwise " is that orientation based on the figure or position are closed System is merely for convenience of description the embodiments of the present invention and simplifies description, rather than the device of indication or suggestion meaning Or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model The limitation of embodiment.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply phase To importance or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be with Explicitly or implicitly include one or more feature.It is " more in the description of the embodiments of the present invention It is a " it is meant that two or more, unless otherwise specifically defined.

In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected；It can be directly connected, the company inside two elements can also be can be indirectly connected through an intermediary 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 embodiments of the present invention.

In the embodiments of the present invention unless specifically defined or limited otherwise, fisrt feature is in second feature "upper" or "lower" may include that the first and second features directly contact, may include the first and second features be not direct yet It contacts but by the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " includes fisrt feature right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second Feature.Fisrt feature includes that fisrt feature is immediately below second feature and oblique under the second feature " below ", " below " and " below " Lower section, or first feature horizontal height is merely representative of less than second feature.

Following disclosure provides many different embodiments or example is used to realize the embodiments of the present invention Different structure.In order to simplify the disclosure of the embodiments of the present invention, 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 embodiments of the present invention mentions The example of the various specific techniques and material that have supplied, but those of ordinary skill in the art may be aware that other techniques are answered With and/or other materials use.

Referring to Fig. 1, the utility model embodiment provides a kind of transformer 100.Transformer 100 includes armature winding 10 and secondary windings 20.Secondary windings 20 is separated with armature winding 10.The winding width W1 of armature winding 10 is greater than armature winding 10 stack height H1, i.e. W1 > H1.The winding width W2 of secondary windings 20 is less than the stack height H2, i.e. W2 of secondary windings 20 <H2。

In transformer 100 in above embodiment, since the winding width W1 of armature winding 10 is greater than armature winding 10 Stack height H1, and the winding width W2 of secondary windings 20 be less than armature winding 10 stack height H1, so that become Depressor 100 is able to maintain while a suitable coupling efficiency structure simplification and miniaturization but also transformer 100, and this The transformer 100 of embodiment is without carrying out wire jumper slot design, without the magnetic gap precision for excessively high requiring transformer 100.

Specifically, transformer 100 includes two to plug in magnetic core 30, on the one hand, the magnetic gap width between two magnetic cores 30 The coupling efficiency of transformer 100 is influenced, on the other hand, transformer 100 is easy to influence transformer 100 around line width and winding height Coupling efficiency, during use, coupling efficiency is preferably stable between 0.5-1.2 for transformer 100.

In the related technology at one, referring to Fig. 5, transformer 300 is by armature winding 1, secondary windings 2 and heater winding 3 are constituted.Magnetic gap 5 is provided 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) and armature winding 1 of armature winding 1 Stack height (H1) relationship are as follows: W1 >=H1.The winding transverse width (W2) of secondary windings 2 and the stacking of secondary windings 2 are high Spend the relationship of (H2) are as follows: W2 >=H2.In the example of hgure 5, 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 guarantee coiling effect generally require to be configured multiple coiling slot positions 9 and One coiling slot position 9 completes to need to carry out when coiling wire jumper to the continuation coiling of another coiling 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 coiling slot positions 9, based on production work at present Skill is easy when coiling, to generate corona effect, to influence the stability of transformer 300 around dislocation.

Another in the related technology, referring to Fig. 6, transformer 400 by armature winding 1, secondary windings 2 and heater around Group 3 is constituted.Magnetic gap 5 is provided between two magnetic cores 4.Armature winding 1, secondary windings 2 and heater winding 3 are arranged in transformation In the width direction of device 300, i.e., arranged on the left and right directions of Fig. 6.The winding transverse width (W1) and armature winding of armature winding 1 Stack height (H1) relationship are as follows: H1 > W1.The winding transverse width (W2) of secondary windings 2 and the stacking of primary and secondary winding are high Spend the relationship of (H2) are as follows: H2 > W2.In the example of fig. 6, although the cross-sectional area of armature winding 1 and secondary windings 2 it is smaller and Corresponding multiple slot positions that no setting is required and be not in around wrong phenomenon, still, when the winding transverse width (W1) of armature winding 1 and secondary When the winding transverse width (W2) of grade winding 2 all reduces, magnetic gap 5 needs to carry out direct proportion and accordingly adjusts, thus to the essence of magnetic gap 5 Degree requires high.Therefore, magnetic gap 5 is put in medium position between armature winding 1 and secondary windings 2 by the transformer of Fig. 6, is reached herein To higher matching efficiency, while decreasing the Adjustment precision of magnetic gap 5.But such structure has the difficulty of specification production precision Degree problem.

In addition, in the transformer of such as Fig. 6, since the stack height H1 of armature winding 1 is relatively high, and H1 > W1, make 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 100, 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. 2, in an embodiment party In formula, the voltage of the most bottom wire winding layer L1 wire winding layer of coiling group is 0, with the raising of the number of plies, such as from L1- > L2- > L3- > L4- The voltage of > L5- > L6- > L7- > L8- > L9- > L10, wire winding layer are gradually increased, since H1 is smaller so that L1 wire winding layer and highest around Voltage difference between line layer L10 wire winding layer 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 100.

In addition, in the present embodiment, referring to Fig. 1, magnetic gap 50 is biased to armature winding 10, so that transformer 100 Coupling efficiency be easily adjusted, and the coupling efficiency of transformer 100 can be stablized 0.5 to 1.2 or so, so that transformer 100 can satisfy service performance demand, and relatively low to the required precision of magnetic gap, and it is raw that such structure has met Current specifications Precision is produced, production difficulty and cost are reduced.

Further more, in the present embodiment, since the stacking that the winding width W2 of secondary windings 20 is less than secondary windings 20 is high H2 is spent, in this way in the structure design of transformer 100, the cross-sectional area of secondary windings 20 is smaller, and present embodiment It does not need to carry out wire jumper when secondary windings coiling, so that the structure of transformer is simplified and minimizes, and can be reduced simultaneously Production difficulty and improve production efficiency.

Further, referring to Fig. 1, in some embodiments, transformer 100 includes the bobbin 40 of insulation, coiling Pipe 40 opens up spaced single primary winding slot 42 and single secondary rolling thread slot 44, the coiling of armature winding 10 be wound on it is primary around Wire casing 42, the coiling of secondary windings 20 are wound on secondary rolling thread slot 44.

In this way, the winding of the transformer 100 of present embodiment does not need to carry out wire jumper when carrying out coiling, so as to drop The production difficulty and raising production efficiency of low transformer 100.

Specifically, in the present embodiment, bobbin 40 only opens up single secondary rolling thread slot 44, and makes relative to Fig. 5 It must be wound on the stack height H2 for being less than secondary windings 20 around line width W2 of the secondary windings 20 on secondary rolling thread slot 44, existed in this way Maintain the voltage difference between the wire winding layer of secondary windings 20 in suitable range while, the knot of transformer 100 can be made Structure is simplified and minimizes, and does not need to carry out wire jumper when coiling, can reduce the difficulty of production in this way, improve production efficiency. It should be noted that although 100 secondary windings of transformer only opens up single secondary rolling thread slot 44 in the present embodiment, originally The design of embodiment can overcome the problems, such as in production technology, so that the transformer 100 of present embodiment is still able to satisfy technique On requirement and service performance requirement.

In some embodiments, the winding width W2 of the stack height H2 of secondary windings 20 and secondary windings 20 meet with Lower relational expression, 1.1 < H2/W2 < 2.5, H2 indicate the stack height of secondary windings 20, and W2 indicates that the winding of secondary windings 20 is wide Degree.

So, so that secondary windings 20 can satisfy the demand of the service performance of transformer 100.

It is appreciated that since the stack height H2 of secondary windings 20 and the winding width W2 of secondary windings 20 meet with ShiShimonoseki It is formula, 1.1 < H2/W2 < 2.5, so that the voltage difference between each wire winding layer of secondary windings 20 can maintain a conjunction Suitable range.Preferably, the stack height H2 of secondary windings 20 can be 1.2 to 2 times of the winding width W2 of secondary windings 20. It should be noted that specific numerical value or numerical value model can be obtained according to the magnetic gap precision of production line in actual production It encloses.It, can if W2's needs to be designed smaller in the case where keeping the ratio of H2 and W2 to meet between 1.1 and 2.5 Magnetic gap is designed smaller, but to the required precision of magnetic gap with regard to relatively high.Likewise, full in the ratio for keeping H2 and W2 In the case that foot is between 1.1 and 2.5, if W2's needs to be designed bigger, magnetic gap can be designed bigger, but It is the required precision to magnetic gap with regard to relatively low.

Referring to Fig. 1, in some embodiments, transformer 100 includes two to plug in magnetic core 30, and bobbin 40 wraps Spacer 46 is included, one end of each magnetic core 30 is located in bobbin 40 and bears against the two sides opposite in spacer 46.

In this way, by spacer 46 so that two can satisfy default magnetic gap 50 to plug in magnetic core 30, so that transformation The coupling efficiency of device 100 is able to maintain that in suitable range.

Specifically, two bear against the two sides opposite in spacer 46 to plug in magnetic core 30, so that two magnetic cores Default magnetic gap 50 can be formed between 30, so that the magnetic gap of transformer 100 is able to satisfy use demand.It should be noted that The quantity of spacer 46 can be two, and a spacer 46 is used to separate one end of two magnetic cores 30, another spacer 46 For separating the other end of two magnetic cores 30.

In some embodiments, transformer 100 includes Filament Winding 60, and bobbin 40 offers filament coil slot 45, Secondary rolling thread slot 44 is located between filament coil slot 45 and primary winding slot 42, and the coiling of Filament Winding 60 is wound on filament coil slot 45.In this way, external microwave generator can be connected, by Filament Winding 60 so as to power to microwave generator.

In some embodiments, transformer 100 includes the cover 70 of insulation, and cover 70 partly covers primary winding slot 42, secondary rolling thread slot 44 and filament coil slot 45.In this way, cover 70 plays the role of protecting magnetic core 30, structure is simple.

Referring to Fig. 3, the utility model embodiment also provides a kind of power supply unit 110.Power supply unit 110 includes rectification Module 112 and power conversion module 114.Rectification module 112 connects alternating current source 116.Power conversion module 114 connects rectification module 112.Power conversion module 114 includes the transformer 100 of any of the above-described embodiment.

In the power supply unit 110 of above embodiment, since the winding width W1 of armature winding 10 is greater than armature winding 10 Stack height H1, and the winding width W2 of secondary windings 20 be less than armature winding 10 stack height H1, so that supply Electric installation 110 is able to maintain while a suitable coupling efficiency structure simplification and miniaturization but also power supply unit 110, and And the power supply unit 110 of present embodiment is without carrying out wire jumper slot design, without excessively high requiring magnetic gap precision.

Specifically, rectification module 112 includes rectifier 1122, inductance 1124 and first capacitor 1126.Rectification module 112 The alternating voltage that alternating current source 116 generates can be converted into DC voltage.It should be noted that in one example, alternating current source 116 be alternating current, and the alternating voltage generated is about 220V, and frequency is about 50HZ.It is appreciated that rectification module 112 may be used also The circuit that takes other form and be not limited to be made of rectifier 1122, inductance 1124, capacitor.Power conversion module 114 includes Switching tube 115, the second capacitor 1144 and current detecting unit 1146, one end of first capacitor 1126 connect the first of transformer 100 10 one end of grade winding, the other end connect current detecting unit 1146.Second capacitor 1144 one end connection 1126 one end and One end of the armature winding 10 of transformer 100, the other end connect the other end and switching tube of the armature winding 10 of transformer 100 115 collector.Power conversion module 114 is used to increase the output power of transformer 100.

In some embodiments, power conversion module 114 includes control module 1147 and voltage doubling rectifier module 1148, control Molding block 1147 is connected to the primary side of transformer 100, and voltage doubling rectifier module 1148 is connected to the primary side of transformer 100.

Specifically, control module 1147 is used to detect alternating current source 116 to obtain detection signal, and according to detection signal The switching frequency of control switch pipe 115.It should be pointed out that detection signal can be the voltage and transformer 100 of AC power source 116 Operating current.Control module 1147 can generate corresponding pulse-width signal (PWM, Pulse according to the detection signal of detection Width Modulation), and according to pulse-width signal come the turn-on time of control switch pipe 115, to change switching tube 115 switching frequency.It should be noted that in one example, pulse-width signal is the arteries and veins that each pulse width is equal Punching changes the width or the adjustable output electricity of duty ratio of pulse by changing the period adjustable output frequency of spike train Pressure, that is to say, that voltage and frequency coordination can be made to change using suitable control method, so as to the week by adjusting PWM Phase, PWM duty ratio and achieve the purpose that control power supply unit 110 electric current.

Voltage doubling rectifier module 1148 includes the first multiplication of voltage diode 1141, the second multiplication of voltage diode 1143, third capacitor 1145 and third capacitor 1149.First multiplication of voltage diode 1141 is separately connected the both ends of the primary side of transformer 100.Second times One end of pressure diode 1143 is connected to one end of the primary side of transformer 100, and the other end is connected to 1149 He of third capacitor Microwave generator 120.One end of third capacitor 1149 connects one end and the microwave generator 120 of the second multiplication of voltage diode 1143. For 4th capacitance connection in one end of the primary side of transformer 100, the other end is connected to third capacitor 1149.

4 are please referred to, the utility model embodiment also provides a kind of microwave cooking electric appliance 200.Microwave cooking electric appliance 200 Transformer 100 and microwave generator 120 including any of the above-described embodiment.Microwave generator 120 connects transformer 100.

In microwave cooking electric appliance 200 in above embodiment, since the winding width W1 of armature winding 10 is greater than primary The stack height H1 of winding 10, and the winding width W2 of secondary windings 20 is less than the stack height H2 of secondary windings 20, in this way So that microwave cooking electric appliance 200 is able to maintain while a suitable coupling efficiency but also the structure of microwave cooking electric appliance 200 Simplify and miniaturization, and the microwave cooking electric appliance 200 of present embodiment is without carrying out wire jumper slot design, without excessively high wanting Seek magnetic gap precision.

It is appreciated that the Filament Winding 45 of transformer 100 connects microwave generator 120.Specifically, microwave generator 120 It can be magnetron.Magnetron is a kind of electron tube for generating microwave energy.Electronics in magnetron is being mutually perpendicular to Stationary magnetic field and steady electric field control under, interact with electromagnetic field of high frequency, the output work from transformer 100 Energy conversion is obtained in rate into microwave energy, to achieve the purpose that generate microwave energy.

Specifically, microwave cooking electric appliance 200 further includes cavity 130, door body (not shown) and fan 150.In cavity 130 Equipped with pallet 160, for pallet 160 for placing food to be heated, door body is rotatably arranged in the front of cavity 130, for beating The opening of closed chamber body 130 is opened or closed, microwave generator 120 and transformer 100 are mounted on the outside of cavity 130 and are set to fan 150 blowing direction.When microwave cooking electric appliance 200 works, transformer 100 provides operating current to microwave generator 120, micro- Baud generator 120 generates the microwave energy for food in heating cavity 130.Meanwhile fan 150 is absorbable from extraneous sky Gas, and air-flow is formed, air-flow may pass through air duct and conduct in transformer 100, and carry out cooling and heat dissipation to transformer 100, cold But after transformer 100, air-flow can be expelled to outside microwave cooking electric appliance 200 out of transformer 100 again.

In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example Body characteristics, structure, material or feature are contained at least one embodiment or example of the utility model.In this specification In, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.

Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system, including the system of processing module or other can be from instruction Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any may include, store, communicating, propagating or Transfer program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment Device.The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings Electrical connection section (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 then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media His suitable method is handled electronically to obtain described program, is then stored in computer storage.

It should be appreciated that each section of the embodiments of the present invention can use hardware, software, firmware or their combination To realize.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution The software or firmware that system executes are realized.For example, in another embodiment, can be used if realized with hardware Any one of following technology well known in the art or their combination are realized: being had for realizing logic function to data-signal The discrete logic of the logic gates of energy, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate Array (PGA), field programmable gate array (FPGA) etc..

Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.

In addition, can integrate in a processing module in each functional unit in each embodiment of the utility model, It is also possible to each unit to physically exist alone, can also be integrated in two or more units in a module.Above-mentioned collection At module both can take the form of hardware realization, can also be realized in the form of software function module.It is described integrated If module is realized and when sold or used as an independent product in the form of software function module, also can store at one In computer-readable storage medium.

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

Although the embodiments of the present invention 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 to be changed in range, modify, replacement and variant.

Claims (9)

1. a kind of transformer characterized by comprising

Armature winding, the winding width of the armature winding are greater 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.

2. transformer as described in claim 1, which is characterized in that the transformer includes the bobbin of insulation, the coiling Pipe opens up spaced single primary winding slot and single secondary rolling thread slot, the coiling of the armature winding be wound on it is described it is primary around Wire casing, the coiling of the secondary windings are wound on the secondary rolling thread slot.

3. transformer as described in claim 1, which is characterized in that the stack height of the secondary windings and the secondary windings Winding width meet following relationship, 1.1 < H2/W2 < 2.5, H2 indicates the stack height of the secondary windings, and W2 indicates institute State the winding width of secondary windings.

4. transformer as claimed in claim 2, which is characterized in that the transformer includes two to plug in magnetic core, it is described around Spool includes spacer, and one end of each magnetic core is located in the bobbin and bears against opposite in the spacer Two sides.

5. transformer as claimed in claim 2, which is characterized in that the transformer includes Filament Winding, and the bobbin is opened Equipped with filament coil slot, the secondary rolling thread slot position is between the filament coil slot and the primary winding slot, the filament The coiling of winding is wound on the filament coil slot.

6. transformer as claimed in claim 5, which is characterized in that the transformer includes the cover of insulation, the cover portion Divide the ground covering primary winding slot, the secondary rolling thread slot and the filament coil slot.

7. a kind of power supply unit characterized by comprising

For connecting the rectification module of alternating current source；With

Connect the power conversion module of the rectification module；The power conversion module includes described in claim any one of 1-6 Transformer.

8. power supply unit as claimed in claim 7, which is characterized in that the power conversion module includes control module and multiplication of voltage Rectification module, the control module are connected to the primary side of the transformer, and the voltage doubling rectifier module is connected to the transformation The primary side of device.

9. a kind of microwave cooking electric appliance, which is characterized in that sent out including the described in any item power supply units of claim 7-8 and microwave Raw device, the power supply unit connect the microwave generator.