CN100438317C - Method for controlling high voltage transformer of microwave oven - Google Patents
Method for controlling high voltage transformer of microwave oven Download PDFInfo
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- CN100438317C CN100438317C CNB021236070A CN02123607A CN100438317C CN 100438317 C CN100438317 C CN 100438317C CN B021236070 A CNB021236070 A CN B021236070A CN 02123607 A CN02123607 A CN 02123607A CN 100438317 C CN100438317 C CN 100438317C
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- tension transformer
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Abstract
The present invention relates to a method for controlling a high voltage transformer of a microwave oven, particularly to a control method of a high voltage transformer with an optimum design. The present invention has the technical scheme that when the transformer for a microwave oven is designed, the power supply of the transformer is controlled into maximum output power in a primary time of the action time of the transformer for the microwave oven; the output power of the transformer is controlled and is lowered after a period of time; more than two power output variations of the power output grade of the transformer is controlled; the primary time is set by the actual service life of the microwave oven as the standard. The present invention is mainly used for designing the optimum high voltage transformer for the microwave oven, the transformer is not only in accordance with the requirements of transformers, but also regulates the increase of temperature of a cable core line by controlling the action period of the transformer. Thus, the present invention can reduce the weight of the high voltage transformer for the microwave oven to about 3.8kg, and can also decrease the production cost by 12 %.
Description
Technical field
The present invention relates to the control method of transformer in a kind of electricity field basic electrical component, particularly relate to a kind of requirement that both meets transformer of designing optimal, also the temperature of regulating core by the action cycle of control transformer rises, and makes the control method (Control method for H.V.trans formicrowave oven) of the high-tension transformer for microwave oven that the weight of high-tension transformer reduces, reduce production costs.
Background technology
The magnetron that is used for microwave oven produces microwave, and when above-mentioned microwave radiation arrived food, the molecule of food inside was along with the frequency of microwave will be with identical speed rotation or vibration.When reaching so vibration or rotation, the frictional heat that takes place between molecule will improve the temperature of food rapidly.
The oscillator that produces above-mentioned microwave is a magnetron, needs voltage circuit for produce microwave in above-mentioned magnetron.
Now the startup loop with magnetron in the existing microwave oven is described in detail as follows.
Seeing also shown in Figure 1ly, is the startup loop schematic diagram of existing magnetron for microwave oven.As shown in Figure 1, during the positive half period of supply voltage, electric current flows according to the solid line among Fig. 1 and guides+2000 volts voltage for the secondary coil of high-tension transformer 1.At this moment, with the high-voltage diode of connecting in the secondary circuit 2, and fill+2000 volts voltage for high-voltage capacitor 4, and on magnetron 3, do not guide voltage.
Then, during the cloudy half period of supply voltage, electric current flows according to the dotted line among Fig. 1 and guides-2000 volts voltage for the secondary coil of high-tension transformer 1.At this moment, with the high-voltage diode 2 in the blocking-up secondary circuit, and in high-voltage capacitor 4 on the secondary coil of charged voltage and high-tension transformer 1 voltage of new guiding owing to have identical direction and therefore add and be in the same place, therefore ,-4000 volt voltage will be directed on the tie point (@) and 3 of magnetrons is shaken.During 3 of above-mentioned magnetrons shake, with the form of anti-ripple rectified wave, the voltage of DC-4000 volt will continue to be fed on the tie point (@) of magnetron 3.
So being applicable to the high-tension transformer of microwave oven, is to produce microwave by the very high high-tension electricity that input DC-4000 lies prostrate.
Because the great majority that carry out in the microwave oven cooking was finished within 20 minutes, was within 20 minutes so need the cooking time set of maximum power output.
Because the designing requirement of high-tension transformer for microwave oven is defined as the twice (2HR) of maximum duration usually, therefore most manufacturer is usually designed to the twice (2HR) of maximum duration when the design high-tension transformer for microwave oven.
Seeing also shown in Figure 2ly, is the control action precedence diagram of the high-tension transformer of prior art.As shown in Figure 2, the capacity of control method that is installed in the high-tension transformer for microwave oven of product inside also is equivalent to 90 minutes, and constitutes had peak power output between its 90 minutes (transformer 100% output).
Seeing also Fig. 3 a, Fig. 3 b, shown in Fig. 3 a, is the actuating of relay figure of the high-tension transformer of prior art, and Fig. 3 b is the temperature characteristics figure of core of the high-tension transformer of prior art.
Because the above-mentioned control method and the designing requirement of product, the microwave oven of prior art is controlled to be the twice (2HR) of maximum duration with relay, and when making the output of transformer 100%, shown in Fig. 3 b, the core temperature of transformer will rise rapidly.
Therefore, when using microwave oven for a long time,, not only need increase the coil turn of high-tension transformer 1, and will use bigger coil in order to emit the many heats that produce in the above-mentioned high-tension transformer 1.Owing to these reasons, existing high-tension transformer for microwave oven has the production cost rising and has the heavier defectives such as weight of about 4.8Kg.
And along with the increase of above-mentioned high-tension transformer 1 capacity, the diode and the capacitor volume that are used for above-mentioned high-tension transformer startup loop also should increase, and therefore have the defective that the integral production cost rises.
This shows that the control method of above-mentioned existing high-tension transformer for microwave oven still has many defectives, and the assistant officer treats further to be improved.
In order to solve the problem of the control method existence that has high-tension transformer for microwave oven now, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable method finished by development, and general manufacture method does not have appropriate method to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that the control method of above-mentioned existing high-tension transformer for microwave oven exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge thereof, actively studied innovation, in the hope of founding a kind of control method of new high-tension transformer for microwave oven, can improve the control method of the high-tension transformer for microwave oven of general existing routine, make it have more practicality.Through constantly research, design, and, create the present invention who has practical value finally through repetition test and after improving.
Summary of the invention
Main purpose of the present invention is, overcome the defective of the control method existence of existing high-tension transformer for microwave oven, and provide a kind of control method of new high-tension transformer for microwave oven, technical problem underlying to be solved is to make it pass through the power output variation of controlled microwave stove with high-tension transformer, and makes transformer cable heart wire harness temperature be controlled to the high-tension transformer for microwave oven control method in certain cycle.
Purpose of the present invention and to solve its technical problem underlying be to adopt following technical scheme to realize.A kind of high-tension transformer for microwave oven control method according to the present invention's proposition, during its design microwave oven transformer, in the operate time of microwave oven transformer, in a period of time of beginning, the power of transformer supply is controlled to peak power output, in the power output of controlling and reduce transformer through this section after the period.
The object of the invention to solve the technical problems can also adopt following technical measures further to realize.
The control method of aforesaid high-tension transformer for microwave oven, the output power level of wherein said transformer are controlled to has two or more power output change of rank.
The control method of aforesaid high-tension transformer for microwave oven, a period of time of wherein said beginning is to set according to the time used of microwave oven.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, the control method of high-tension transformer for microwave oven of the present invention, it is the control method of relevant optimal design high-tension transformer, the present invention has designed best high-tension transformer for microwave oven, it had both met the requirement of transformer, also can regulate the temperature rising of core by the action cycle of control transformer.Therefore, the present invention can be reduced to the weight of high-tension transformer for microwave oven about 3.8Kg, also can obtain its production cost and reduce about 12% effect.
In sum, the control method of the high-tension transformer for microwave oven that the present invention is special can be reduced to the weight of high-tension transformer for microwave oven about 3.8Kg, also can obtain its production cost and reduce about 12% effect.Therefore, therefore the present invention can design best high-tension transformer for microwave oven owing to controlled high-tension transformer and made it have the power output variation.It has above-mentioned many advantages and practical value, and in class methods, do not see have similar method to publish or use, no matter and it is all having bigger improvement on method or on the function, have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thus be suitable for practicality more, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.
Concrete manufacture method of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the electric power loop figure of the high-tension transformer for microwave oven of prior art.
Fig. 2 is the control action precedence diagram of the high voltage transformer of microwave oven of prior art.
Fig. 3 a is the actuating of relay figure of the high voltage transformer of microwave oven of prior art.
Fig. 3 b is the temperature characteristics figure of core of the high voltage transformer of microwave oven of prior art.
Fig. 4 is the control action precedence diagram of high voltage transformer of microwave oven of the present invention.
Fig. 5 is the actuating of relay figure of high voltage transformer of microwave oven of the present invention.
Fig. 6 is the temperature characteristics figure of the core of high voltage transformer of microwave oven of the present invention.
Fig. 7 is the control method block diagram of high-tension transformer for microwave oven of the present invention.
1...... high-tension transformer 2...... high-voltage diode
3...... magnetron 4...... high-voltage capacitor
5...... power suppling part 10...... temperature detecting part
15...... timer 20...... control part
25...... high-tension transformer 30...... magnetron
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, its concrete grammar of control method, step, feature and the effect thereof of the high-tension transformer for microwave oven that foundation the present invention is proposed, describe in detail as after.
Seeing also shown in Figure 7ly, is the block diagram of microwave oven transformer control method of the present invention.
The control method of high-tension transformer for microwave oven of the present invention, its high-tension transformer for microwave oven 25 will constitute the half-wave multiplication of voltage loop that makes magnetron 30 produce microwave to start the loop.Power suppling part 5 will be to above-mentioned high-tension transformer 25 power supplies.
The said high-tension transformer 25 of the present invention is characterised in that, as the designing requirement of common high-tension transformer for microwave oven, is defined as 90 minutes its longest service time.But, make high-tension transformer 25 runnings in the time of 90 minutes in the present invention, regulate its control method and then make the core temperature of high-tension transformer 25 be controlled to certain temperature.
During by action in 90 minutes of the above-mentioned high-tension transformer of control part of the present invention 20 controls, also comprise detection streamer heart wire harness temperature and its detection signal is offered the temperature detecting part 10 of above-mentioned control part 20.And, also include the timer 15 of metering time.
Now the action specification of the employing microwave oven transformer of the present invention that above-mentioned structure like this is constituted is as follows.
High-tension transformer 25 will obtain power supply for the first time and produce the high pressure of identical size in its secondary terminals from power suppling part 5.At this moment, control part 20 will be controlled the action of above-mentioned high-tension transformer 25, and the startup factor-relay (not shown) that starts high-tension transformer 25 by above-mentioned control part 20 is vibrated above-mentioned high-tension transformer 25.
A certain size the voltage that is directed on the secondary terminals of above-mentioned high-tension transformer 25 will be fed on the magnetron 30, and above-mentioned magnetron 30 is the same with above-mentioned action illustrated in fig. 1, makes magnetron 30 produce vibration in during the blocking-up high-voltage diode and microwave takes place.
For making above-mentioned magnetron 30 produce the high-tension transformer 25 that vibration is provided with, be directly proportional with its start-up time and will produce a large amount of heats.Same as the prior art, when continue starting high-tension transformer 25 starting the factors-relay in 2 times of times (2HR) of maximum duration, the core temperature of above-mentioned high-tension transformer 25 will rise to maximum temperature.But, in the present invention, consider that usually the 30 needed peak power output times of magnetron are 20 minutes when the cooking, therefore be restricted to 20 minutes the longest operate time with above-mentioned high-tension transformer 25.And in its remaining time (from 90 minutes remaining time), make it have power output the switch motion that repeats the startup factor-relay of high-tension transformer 25 and change.
Now the microwave oven transformer of the present invention of said structure being had the control procedure that power output changes is described in detail as follows.
Seeing also shown in Figure 4ly, is the control action precedence diagram of high voltage transformer of microwave oven of the present invention.
According to the requirement of product, will operate time of transformer be set at 90 minutes when (the 220th stage), control part 20 starts the startup factor-relay (not shown) and the power supply (the 220th stage) of high-tension transformers 25.
By the action in above-mentioned the 220th stage, the alternating current of importing by power suppling part 5 commonly used will be fed on the once end of high-tension transformer 25.Above-mentioned high-tension transformer 25 will produce voltage on the secondary terminals based on voltage on the once end that is fed to.
In addition, after the power supply supply by above-mentioned the 220th stage, whether control part 20 will detect and pass through the time that sets.That is to say that the certain hour of beginning (about 20 minutes) continues to give above-mentioned high-tension transformer 25 power supplies so that keep the operating state that high-tension transformer 25 continues.At this moment, be directly proportional with the operating time of high-tension transformer 25 and will produce the highest power output (100%).
And through after the certain hour of above-mentioned beginning, control part 20 will repeat to control high-tension transformer 25) the startup factor-relay (the 230th stage).The action in above-mentioned the 230th stage will last till till remaining time of 2 times (2HR) of the maximum duration of having set.At this moment, will reduce with operating time of high-tension transformer 25 its power output (100%) that is inversely proportional to, and its output power level about 60% is good.
That is to say the action that the relay of high-tension transformer 25 will turn round and cut out behind the certain hour again.At this moment will repeat, will be fed to power supply on inner high voltage transformer 25 the once end, and on the once end of the cycle of closing of relay inner high voltage transformer 25, will block the action of power supply in the service cycle of relay.
As mentioned above, in the real time (about 20 minutes) that needs are cooked, control part 20 will be controlled high-tension transformer 25 and make it that lasting operating state be arranged.But,, as shown in Figure 5, repeat to control the startup factor-relay of high-tension transformer 25 and reduce the heat that high-tension transformer 25 produces with some cycles through after the above-mentioned time.
See also shown in Figure 6, by above-mentioned control method, make 90 minutes high-tension transformer of work (25) core temperature control and make it stable.
Therefore, technological innovation part of the present invention is, for the high-tension transformer for microwave oven of designing optimal, it is characterized in that both meeting the requirement of transformer, also regulates the temperature rising of core by the action cycle of control transformer.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, any those skilled in the art may utilize the method for above-mentioned announcement and the equivalent embodiment that technology contents was changed or be modified to equivalent variations, but every technical solution of the present invention content that do not break away from,, all still belong in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (4)
1, a kind of high-tension transformer for microwave oven control method, when it is characterized in that designing microwave oven transformer, in the operate time of microwave oven transformer, in a period of time of beginning, the power of transformer supply is controlled to peak power output, in the power output of controlling and reduce transformer through this section after the period.
2, high-tension transformer for microwave oven control method according to claim 1, the output power level that it is characterized in that wherein said transformer is controlled to has two or more power output change of rank.
3, high-tension transformer for microwave oven control method according to claim 2, a period of time that it is characterized in that wherein said beginning is to set according to the time used of microwave oven.
4, high-tension transformer for microwave oven control method according to claim 2 is characterized in that wherein said power output grade is 100% and 60% two kind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021236070A CN100438317C (en) | 2002-07-04 | 2002-07-04 | Method for controlling high voltage transformer of microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021236070A CN100438317C (en) | 2002-07-04 | 2002-07-04 | Method for controlling high voltage transformer of microwave oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1466263A CN1466263A (en) | 2004-01-07 |
| CN100438317C true CN100438317C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021236070A Expired - Fee Related CN100438317C (en) | 2002-07-04 | 2002-07-04 | Method for controlling high voltage transformer of microwave oven |
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| Country | Link |
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| CN (1) | CN100438317C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100821917B1 (en) * | 2005-12-20 | 2008-04-17 | 주식회사 대우일렉트로닉스 | Over heating preventing method for microwave oven |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1233727A (en) * | 1998-04-30 | 1999-11-03 | 三星电子株式会社 | Magnetron driving control apparatus of microwave oven and method thereof |
| US6025582A (en) * | 1997-11-06 | 2000-02-15 | Samsung Electronics Co., Ltd. | Output control for a microwave oven, a hood device and associated lamp |
-
2002
- 2002-07-04 CN CNB021236070A patent/CN100438317C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6025582A (en) * | 1997-11-06 | 2000-02-15 | Samsung Electronics Co., Ltd. | Output control for a microwave oven, a hood device and associated lamp |
| CN1233727A (en) * | 1998-04-30 | 1999-11-03 | 三星电子株式会社 | Magnetron driving control apparatus of microwave oven and method thereof |
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| Publication number | Publication date |
|---|---|
| CN1466263A (en) | 2004-01-07 |
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Granted publication date: 20081126 |