CN102623143A - High-voltage transformer having ventilation duct for microwave oven - Google Patents
High-voltage transformer having ventilation duct for microwave oven Download PDFInfo
- Publication number
- CN102623143A CN102623143A CN2011101156668A CN201110115666A CN102623143A CN 102623143 A CN102623143 A CN 102623143A CN 2011101156668 A CN2011101156668 A CN 2011101156668A CN 201110115666 A CN201110115666 A CN 201110115666A CN 102623143 A CN102623143 A CN 102623143A
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- CN
- China
- Prior art keywords
- ventilation duct
- coil holder
- microwave oven
- ferrite core
- voltage transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/025—Constructional details relating to cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/02—Stoves or ranges heated by electric energy using microwaves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F2038/003—High frequency transformer for microwave oven
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
Provided is a high-voltage transformer having ventilation duct for microwave oven. The high-voltage transformer avoids the damage to the inverter resulting from the temperature of the high-voltage transformer rising to the Curie point by forming a ventilating duct at the side surface of the high-voltage transformer of an inverter applied to the microwave oven. Moreover, the high-voltage transformer of the inverter-type microwave oven can be minisize. In addition, the employment of the ventilation duct reduces the manufacturing cost. The high-voltage transformer comprises: a ferrite core member composed of an upper portion and a lower portion, a coil holder having a through hole formed inside the coil holder, which makes the ferrite core member be jointed in the up-and-down direction via the through hole, a ventilation duct formed at two sides of the coil holder member in an extending member, and a winding slot that forms at the periphery of the coil holder to accept various coils wound inside the winding slot.
Description
The cross reference of related application
The application's case is based on the 10-2011-0008775 korean patent application case of submitting to Korea S Department of Intellectual Property on January 28th, 2011 and require its priority, and the disclosed full content of this korean patent application case is incorporated this paper by reference into.
Technical field
The present invention relates to a kind of high-tension transformer that is used for microwave oven with ventilation duct.More specifically; The present invention relates to a kind of such high-tension transformer that is used for microwave oven with ventilation duct; This high-tension transformer forms through the side at the high-tension transformer of the inverter that is used for microwave oven that ventilation duct prevents because the temperature of high-tension transformer rises to Curie point and inverter is caused damage; And, therefore can make the high-tension transformer of inverter type microwave oven microminiaturized, and reduce manufacturing cost through using ventilation duct to dispel the heat swimmingly.According to the said high-tension transformer that is used for microwave oven with ventilation duct; Make and have leakage flux in the ferrite core member owing to forming the elliptical line frame member; And elliptical coil is on said coil holder member; Thereby coupled systemes numerical value K is reduced artificially, so that high-tension transformer is influenced by load impedance is less, and therefore load current almost remains unchanged.
Background technology
In order to drive the magnetron of microwave oven, between anode and negative electrode, apply direct current (DC) high pressure that rated voltage is about 4500V, and independent current source (about 3V) is applied to filament.In most of microwave ovens, use transformer type commonly used obtaining to be used for the high direct voltage of anode, but the use of inverter style progressively increase.
Inverter style is such type: through high-frequency current is flow to ferrite core is produced high pressure as the high-tension transformer of core material, and have the characteristic of electric control output voltage freely.That is, because the output of magnetron and being in proportion of anode voltage, and inverter can be regulated anode voltage, therefore can change the output of magnetron linearly.
By contrast, according to the common transformer type of correlation technique, anode voltage is fixed, and therefore can not change the output of transformer.Although can be through regulating output in maximum output state ON/OFF change in duty cycle, it possibly not be that accurate output is regulated that such output is regulated.
As stated, because the inverter type microwave oven can change output linearly, therefore need different types of cooking menu of good to eat cooking quality to be stressed by the consumer.Yet although have such advantage, the reason that the inverter type microwave oven does not generalize is: compare with the microwave oven of common transformer type, its manufacturing cost is high.Therefore, through with high-tension transformer microminiaturized significantly reduce material cost be important a bit, and, be necessary ferrite core microminiaturized in order to make high-tension transformer microminiaturized.Yet if the size decreases of ferrite core, caloric value increases because of core loss, makes temperature rise to Curie (Curie) point, and therefore damages inverter.Therefore, make ferrite core microminiaturized, simultaneously keep its temperature be lower than Curie point be important a bit, and for this reason, the quick heat radiating of ferrite core is necessary.
And when coupled systemes numerical value K was " 1 ", transformer became ideal transformer, and under this state, primary energy has no loss ground to be transferred to secondary.Yet in the reality, coupled systemes numerical value K is because some problems can not reach " 1 ".And most of transformers need make great efforts to make coupled systemes numerical value K near " 1 ", and the high-tension transformer that is used for microwave oven need reduce coupled systemes numerical value K a little through manual method.
Summary of the invention
Therefore, the present invention is with thinking the above-mentioned problem of mentioning that occurs in the prior art that solves, the advantage that complete maintenance prior art of while is realized.
The theme that the present invention realizes provides a kind of high-tension transformer with ventilation duct that is used for microwave oven; This high-tension transformer forms through the side at the high-tension transformer of the inverter that is used for microwave oven that ventilation duct prevents because the temperature of high-tension transformer rises to Curie point and inverter is caused damage, and therefore can make the high-tension transformer of inverter type microwave oven microminiaturized and reduce manufacturing cost through using ventilation duct to dispel the heat swimmingly.
Another theme that the present invention realizes provides a kind of high-tension transformer with ventilation duct that is used for microwave oven; In said high-tension transformer; The coil holder member that forms ellipse makes and in the ferrite core member, has leakage flux; And oval coil is wound on the coil holder member, thereby coupled systemes numerical value K is reduced so that high-tension transformer receives the influence of load impedance less artificially, and therefore load current almost remains unchanged.
In one aspect of the invention, a kind of high-tension transformer with ventilation duct that is used for microwave oven is provided, this high-tension transformer comprises: the ferrite core member, and this ferrite core member forms the upper and lower respectively; With the coil holder member, this coil holder member has: through hole, and this through hole is formed on the inboard of said coil holder member, makes said ferrite core member on above-below direction, engage through said through hole; Ventilation duct, this ventilation duct is formed extended at both sides the both sides at said coil holder member; And slot for winding, this slot for winding is formed on the periphery of said coil holder member to hold the various coils that are wound in the said slot for winding.
Preferably, slot for winding is separated protruding the separation, makes primary coil, secondary coil and heater winding reel above that respectively.
As stated, according to the embodiment of the present invention the high-tension transformer with ventilation duct that is used for microwave oven has following advantage.
First; Side through at the high-tension transformer of the inverter that is used for microwave oven forms ventilation duct; Prevent because the temperature of high-tension transformer rises to Curie point and inverter is caused damage, and therefore make microminiaturized the reaching of high-tension transformer of inverter type microwave oven reduce manufacturing cost through using ventilation duct to dispel the heat swimmingly.
Second; Because the oval-shaped coil holder member of formation makes and in the ferrite core member, has leakage flux; And the oval coil of reeling on the online frame member, thus coupled systemes numerical value K by artificial reduce so that high-tension transformer influenced by load impedance less, and therefore load current almost remains unchanged.
Description of drawings
In conjunction with accompanying drawing, to describe in detail according to hereinafter, above and other objects of the present invention, feature and advantage will be more obvious, wherein:
Fig. 1 is the perspective view that the high-tension transformer with ventilation duct that is used for microwave oven according to the embodiment of the present invention is shown;
Fig. 2 is the vertical section figure of the high-tension transformer with ventilation duct that is used for microwave oven according to the embodiment of the present invention; And
Fig. 3 is the horizontal sectional view of the high-tension transformer with ventilation duct that is used for microwave oven according to the embodiment of the present invention.
Embodiment
Hereinafter, will combine accompanying drawing to describe preferred implementation of the present invention in detail.The object that in description, limits (matters) such as detailed structure and element, only be to be used to help those skilled in the art's complete understanding detail of the present invention, so the present invention is not limited to this.In the accompanying drawings, in order to get across, can amplification layer or regional size and relative size.
Fig. 1 is the perspective view that the high-tension transformer with ventilation duct that is used for microwave oven according to the embodiment of the present invention is shown.Fig. 2 is the vertical section figure of the high-tension transformer with ventilation duct that is used for microwave oven according to the embodiment of the present invention, and Fig. 3 is the horizontal sectional view of the high-tension transformer with ventilation duct that is used for microwave oven according to the embodiment of the present invention.
The high-tension transformer with ventilation duct 21 1 that is used for microwave oven according to the embodiment of the present invention comprises ferrite core member 10, and this ferrite core member 10 forms the upper and lower respectively; With coil holder member 20; Coil holder member 20 has formation through hole within it makes ferrite core member 10 engage through through hole at above-below direction; Ventilation duct 21 is formed extended at both sides on the both sides of online frame member 20, and slot for winding 22 is formed on the periphery of coil holder member 20 to hold each coil that is wound in the slot for winding.
Here, ferrite core member 10 uses ferrites to form cores, and ferrite core member 10 is used for producing magnetic flux through the electric current in primary coil 30 side flow, and the magnetic flux that produces through the electromagnetic induction utilization is at secondary coil 40 side changing voltages.Ferrite core member 10 comprises top ferrite core member 10a and bottom ferrite core member 10b, and top ferrite core member 10a and bottom ferrite core member 10b are with identical shaped formation and be inserted in the through hole of coil holder member 20 as the quilt that literary composition is described in the back engages one another.
Because ferrite core member 10 is identical with ferrite core in the correlation technique, so will omits it and describe in further detail.
On the other hand, ferrite core member 10 engages through coil holder member 20, and primary coil 30, secondary coil 40 and heater winding 50 are wound on respectively on the coil holder member 20.
The inboard of online frame member 20 forms through hole, make ferrite core member 10 on above-below direction, engage through through hole, and ventilation duct 21 is formed extended at both sides the both sides of online frame member 20.Slot for winding 22 is formed on the periphery of coil holder member 20 to hold coiling each coil within it.
In this case, the coil holder member forms with elliptical shape, makes the coil holder member that is wound with coil on it form corresponding elliptical shape.
When coupled systemes numerical value K was " 1 ", transformer became ideal transformer, and in the case, primary energy is transferred to primary side and do not had any loss.Yet in reality, coupled systemes numerical value K is owing to some reasons can not reach " 1 ".In the instance of most of transformers; As coupled systemes numerical value K during near " 1 "; These transformers are rated as has good performance; Therefore and transformer need make great efforts to make coupled systemes numerical value K near " 1 ", and the transformer of inverter that is used to drive the magnetron of microwave oven need reduce coupled systemes numerical value K a little through manual method.
Magnetron has following characteristic: its internal driving changes and changes widely according to body temperature, and therefore needs the careful body temperature of noting.If body temperature rises, then regardless of the same voltage that is applied, internal driving is lowered, to increase electric current to the rated current that surpasses magnetron.If use the transformer of the magnetron with high coupling coefficient K, load current increases according to temperature increase pari passu, and as stated, magnetron is surpassing work under the electric current of rated current, or the life-span of magnetron can shorten.
Therefore, for addressing the above problem, need reduce coupled systemes numerical value K artificially so that load current influenced by load impedance less.As shown in Figure 3, coil 30 is reeled with elliptical shape, and therefore the joint between ferrite core member 10b and the coil 30 because of existing the gap to fluff between the central angle of ferrite core member 10b and the coil 30.Along with ferrite core member 10 more closely contacts with coil each other, it is big that coupled systemes numerical value K becomes, and along with the change of the joint between said ferrite core member 10 and coil pine, coupled systemes numerical value K is because of existing leakage flux to diminish in the ferrite core member 10.
Between ferrite core member 10 and coil holder member 20, form ventilation duct 21, and, guaranteed the direct space that contacts with air of an end of ferrite core member 10, and the heat that ferrite core member 10 produces is distributed to the outside soon through ventilation duct.Therefore, prevent that the temperature increase of ferrite core member 10 from arriving above Curie point, and therefore can prevent to damage inverter.
And slot for winding 22 is separated protruding 23 by two and is separated into three spaces, makes primary coil 30, secondary coil 40 and heater winding 50 be wound on respectively in said three spaces, and therefore can prevent between the line of coil or dielectric breakdown that interlayer produces.
Although described preferred implementation of the present invention for purpose of explanation, it is possible it will be understood by those skilled in the art that various changes, adding and substitute, and does not like the disclosed the spirit and scope of the present invention of claim enclosed and do not break away from.
Claims (3)
1. high-tension transformer that is used for microwave oven with ventilation duct, said high-tension transformer comprises:
The ferrite core member, said ferrite core member forms the upper and lower respectively; And
The coil holder member, this coil holder member has: through hole, this through hole is formed on the inboard of said coil holder member, makes said ferrite core member on above-below direction, engage through said through hole; Ventilation duct, this ventilation duct are formed extended at both sides on the both sides of said coil holder member; And slot for winding, this slot for winding is formed on the periphery of said coil holder member to hold the various coils that are wound in the said slot for winding.
2. high-tension transformer as claimed in claim 1, wherein said slot for winding are separated protruding the separation, make primary coil, secondary coil and heater winding be wound on respectively on the said slot for winding.
3. high-tension transformer as claimed in claim 1, wherein said coil holder member forms with elliptical shape, makes the said coil holder member that is wound with said coil form corresponding elliptical shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2011-0008775 | 2011-01-28 | ||
| KR1020110008775A KR101197562B1 (en) | 2011-01-28 | 2011-01-28 | High-voltage transformer having ventilation duct for microwave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102623143A true CN102623143A (en) | 2012-08-01 |
Family
ID=46563001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101156668A Pending CN102623143A (en) | 2011-01-28 | 2011-05-04 | High-voltage transformer having ventilation duct for microwave oven |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101197562B1 (en) |
| CN (1) | CN102623143A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571208A (en) * | 2015-10-12 | 2017-04-19 | 台达电子工业股份有限公司 | Magnetic structure |
| CN109979719A (en) * | 2017-12-27 | 2019-07-05 | 致茂电子(苏州)有限公司 | Transformer device structure and its coil holder |
| CN110033935A (en) * | 2019-05-14 | 2019-07-19 | 深圳市斯比特电子有限公司 | A kind of high efficiency and heat radiation transformer |
| CN110690031A (en) * | 2019-10-16 | 2020-01-14 | 广东美的厨房电器制造有限公司 | Transformer framework, transformer and electric equipment |
| CN111223635A (en) * | 2018-11-27 | 2020-06-02 | 株式会社碧陆斯 | Voltage transformation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282081A (en) * | 1999-06-03 | 2001-01-31 | 夏普公司 | Step-up transformer for high freguency heater |
| CN1767095A (en) * | 2004-10-26 | 2006-05-03 | 胜美达集团株式会社 | Transformer and transformer production method |
| CN1813322A (en) * | 2003-06-26 | 2006-08-02 | 伊顿动力品质公司 | Hybrid air/magnetic core inductor |
-
2011
- 2011-01-28 KR KR1020110008775A patent/KR101197562B1/en not_active IP Right Cessation
- 2011-05-04 CN CN2011101156668A patent/CN102623143A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282081A (en) * | 1999-06-03 | 2001-01-31 | 夏普公司 | Step-up transformer for high freguency heater |
| CN1813322A (en) * | 2003-06-26 | 2006-08-02 | 伊顿动力品质公司 | Hybrid air/magnetic core inductor |
| CN1767095A (en) * | 2004-10-26 | 2006-05-03 | 胜美达集团株式会社 | Transformer and transformer production method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571208A (en) * | 2015-10-12 | 2017-04-19 | 台达电子工业股份有限公司 | Magnetic structure |
| CN109979719A (en) * | 2017-12-27 | 2019-07-05 | 致茂电子(苏州)有限公司 | Transformer device structure and its coil holder |
| CN111223635A (en) * | 2018-11-27 | 2020-06-02 | 株式会社碧陆斯 | Voltage transformation device |
| CN110033935A (en) * | 2019-05-14 | 2019-07-19 | 深圳市斯比特电子有限公司 | A kind of high efficiency and heat radiation transformer |
| CN110690031A (en) * | 2019-10-16 | 2020-01-14 | 广东美的厨房电器制造有限公司 | Transformer framework, transformer and electric equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101197562B1 (en) | 2012-11-06 |
| KR20120087529A (en) | 2012-08-07 |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120801 |