KR20040050695A - Transformer assembly for Microwave oven, Method for assembling of transformer assembly for microwave oven, and Microwave oven - Google Patents

Abstract

PURPOSE: A transformer assembly for a microwave oven, an assembling method of a transformer assembly for a microwave oven and a microwave oven are provided to realize the high-efficient cooling of a transformer for a microwave oven, to reduce the production cost, to improve the reliability of a product by reducing vibration and noise, and to improve workability by minimizing the mounting space of a microwave oven. CONSTITUTION: A base plate(123) of a container(12) includes a base part(321) forming the bottom of the container, an extension part(322a) extending from both ends of the base part, and a combining part(322) having a connecting part(322b) inwardly bending from the extension part and connected to a bottom plate(118) of an electrical device chamber. The distance(R1) from the central line(C) of a transformer is shorter than the distance(R2) between the central line to a side plate(121) to make the connecting position of the bottom plate and a bracket of the transformer inside the side plate.

Description

Transformer assembly for microwave oven, Method for assembling of transformer assembly for microwave oven, and Microwave oven}

The present invention relates to a liquid-cooling transformer assembly for a microwave oven, a method for manufacturing the transformer assembly, and a microwave oven on which the transformer assembly is mounted.

The microwave transformer boosts the voltage of the power supply and applies it to the magnetron, and includes a core and first and secondary coils wound around the core. Such a transformer is mounted together with other electrical components, that is, a high pressure capacitor, a cooling fan, etc. in a cooking compartment of a microwave oven and an electrical compartment formed in a compartment. The transformer generates heat due to the resistance of the coil and the generation of the eddy current due to the change in the magnetic flux density of the core. In general, the heat is cooled by an air cooling method by a cooling device including a fan and a fan motor.

On the other hand, the transformer has solved this problem by using a separate dust-proof rubber because there is a problem that causes vibration and noise during operation.

However, the cooling of the transformer relying only on air cooling as described above not only decreases the efficiency of the transformer but also reduces the efficiency of the transformer and increases the size of the core and coil, which is a component, in order to reduce such efficiency, thereby increasing the manufacturing cost and also causing vibration and noise. The adhesion of anti-vibration rubber caused another increase in production cost. Meanwhile, in order to prevent noise, temperature rise and corrosion of the core, the existing transformer is formed by forming a thin film on the outer surface of the transformer by immersing it in varnish liquid. There was a problem that the rise of, and also in the microwave oven equipped with a transformer there was a problem of the provision of an insulator to prevent electrical leakage that may occur from the transformer and the increase of the work maneuver accordingly.

The present invention is to solve the above problems, an object of the present invention is to firstly realize the high-efficiency cooling of the microwave transformer by using a cooling material, and secondly to reduce the size and weight according to the reduced parts production cost Third, vibration and noise are reduced during operation, which improves the reliability of the product. Fourth, it has a mounting structure that can be effectively and firmly mounted on the microwave oven to minimize the microwave oven's mounting space. The present invention provides a transformer assembly capable of realizing improved workability due to miniaturization and simple assembly, a method of assembling such a transformer assembly, and a microwave oven employing the transformer assembly.

1A is a side cross-sectional view of a transformer assembly in accordance with an embodiment of the present invention.

1B is a perspective view of a transformer assembly according to an embodiment of the present invention.

2A-2D and 3A-3B are side cross-sectional views illustrating a trans assembly according to the present invention having various configurations for coupling to a microwave oven.

4A-4D are assembly flow diagrams of a trans assembly according to an embodiment of the invention.

5 is a schematic diagram of a microwave oven according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: trance assembly 11: trance

111: core 112: coil

12: container 121: side plate

122: top plate 123: base plate

14: input line 15: output line

16: through hole 17: empty space

18: epoxy treatment 19: terminal portion

20, 21, 22, 23: bracket 201, 211, 221, 231: fixing part

202, 212, 222, 232, 302, 312, 322: coupling

212a, 222a, 232a, 312a, 322a: Extension

212b, 222b, 232b, 312b, 322b: fastening portion

2: screwer 118: one side of the battlefield

119: screw 501: electrical equipment room

502: cooking chamber 503: magnetron

504: cooling fan

Microwave transformer assembly according to the present invention for achieving the above object, a transformer for applying a high voltage to the magnetron in the microwave; A container accommodating the transformer therein and including a base plate coupled to the microwave oven and a cover portion coupled to the base plate; It is characterized in that it comprises a cooling material contained in the container to cool the transformer.

On the other hand, the cooling material is another feature that the mineral oil.

On the other hand, it is another feature that a predetermined vacuum space is formed on the container.

On the other hand, the material of the container is another feature that is aluminum or copper.

On the other hand, the transformer and the base plate is another feature that is fixed by spot welding.

On the other hand, the cover portion and the base plate is another feature that is coupled by brazing welding.

On the other hand, the base plate is a base portion constituting the bottom of the container, the extension portion is bent downwardly extending from both ends of the base portion, and the base portion is bent outward from the extension portion to be spaced apart from the base portion the microwave oven Another feature is to include a fastening coupled to the fastening.

On the other hand, the base plate is a base portion constituting the bottom of the container, an extension portion which is bent downwardly extending from both ends of the base portion, and bent inwardly from the extension portion to be spaced apart from the base portion the microwave oven Another feature is to include a fastening coupled to the fastening.

The transformer may include a primary winding connected to an external power source, a secondary winding producing power transformed by electromagnetic induction by the primary winding, an input line supplying external power to the primary winding, and And an output line for outputting the power transformed from the secondary winding to the magnetron, wherein the cover portion includes a terminal portion connecting the input line and the output line to an external power source and the magnetron side, respectively. In this case, it is another feature that the terminal portion is integrally blocked.

In addition, a microwave oven transformer assembly according to the present invention for achieving the above object, a transformer for applying a high voltage to the magnetron in the microwave; A container containing the trans; A cooling material contained in the container to cool the trans; It is characterized in that it comprises a bracket coupled to one side of the container to couple the container to the microwave oven.

On the other hand, the transformer, one side of the container, is characterized in that the bracket is fixed by the spot point.

On the other hand, the container is characterized in that it further comprises a base plate to which the transformer is fixed, and a cover portion that is brazed to the base plate.

On the other hand, the bracket is fixed to one side of the container, the extending portion is bent downwardly extending from both ends of the fixing portion, and the outer portion is bent outwardly from the extension so as to be spaced apart from the fixing portion the electronic It is another feature to include a fastening portion coupled to the stove.

On the other hand, the bracket is fixed to one side of the container, the extension portion which is bent downwardly extending from both ends of the fixing portion, and bent inward from the extension portion to be spaced apart from the fixing portion by the electronic It is another feature to include a fastening portion coupled to the stove.

The transformer may include a primary winding connected to an external power source, a secondary winding producing power transformed by electromagnetic induction by the primary winding, an input line supplying external power to the primary winding, and And an output line for outputting the power transformed from the secondary winding to the magnetron, wherein the cover portion includes a terminal portion connecting the input line and the output line to an external power source and the magnetron side, respectively. In this case, it is another feature that the terminal unit is integrally blocked.

In addition, a microwave oven according to the present invention for achieving the above object, a cooking room; an electrical equipment compartment that is partitioned with the cooking chamber; A magnetron installed in the electrical equipment room to radiate high frequency to the cooking chamber; A transformer for applying a high voltage to the magnetron; A container accommodating the trans, and including a base plate installed in the electrical equipment compartment and a cover portion coupled to the base plate; It is characterized in that it comprises a cooling material contained in the container to cool the transformer.

On the other hand, the cooling material is another feature that the mineral oil.

On the other hand, it is another feature that a predetermined vacuum space is formed on the container.

On the other hand, the material of the container is another feature that is aluminum or copper.

On the other hand, the transformer and the base plate is another feature that is fixed by spot welding.

On the other hand, the cover portion and the base plate is another feature that is coupled by brazing welding.

On the other hand, the base plate is a base portion constituting the bottom of the container, the extension portion is bent downwardly extending from both ends of the base portion, and the base portion is bent outward from the extension portion to be spaced apart from the base portion the microwave oven Another feature is to include a fastening coupled to the fastening.

On the other hand, the base plate is a base portion constituting the bottom of the container, the extension portion which is bent downwardly extending at both ends of the base portion, and the base portion is bent inward from the extension portion to be spaced apart from the base portion the microwave oven Another feature is to include a fastening coupled to the fastening.

The transformer may include a primary winding connected to an external power source, a secondary winding producing power transformed by electromagnetic induction by the primary winding, an input line supplying external power to the primary winding, and And an output line for outputting the power transformed from the secondary winding to the magnetron, wherein the cover portion includes a terminal portion connecting the input line and the output line to an external power source and the magnetron side, respectively. In this case, it is another feature that the terminal portion is integrally blocked.

In addition, a microwave oven according to the present invention for achieving the above object, a cooking chamber; An electrical equipment compartment partitioned with the cooking chamber; A magnetron installed in the electrical equipment room to radiate high frequency to the cooking chamber; A transformer for applying a high voltage to the magnetron; A container containing the trans; A cooling material contained in the container to cool the trans; It is characterized in that it comprises a bracket coupled to one side of the container to couple the container to the electrical equipment compartment.

On the other hand, the transformer, one side of the container, is characterized in that the bracket is fixed by the spot point.

On the other hand, the container is characterized in that it further comprises a base plate to which the transformer is fixed, and a cover portion that is brazed to the base plate.

On the other hand, the bracket is fixed to one side of the container, the extension portion which is bent downwardly extending from both ends of the fixing portion, and the outward bend from the extension portion to be spaced apart from the fixing portion by a predetermined distance from the microwave oven Another feature is to include a fastening coupled to the fastening.

On the other hand, the bracket is fixed to one side of the container, the extension portion which is bent downwardly extending from both ends of the fixing portion, and bent inward from the extension portion to be spaced apart from the fixing portion by the electronic It is another feature to include a fastening portion coupled to the stove.

The transformer may include a primary winding connected to an external power source, a secondary winding producing power transformed by electromagnetic induction by the primary winding, an input line supplying external power to the primary winding, and And an output line for outputting the power transformed from the secondary winding to the magnetron, wherein the cover portion includes a terminal portion connecting the input line and the output line to an external power source and the magnetron side, respectively. In this case, it is another feature that the terminal unit is integrally blocked.

In addition, the microwave oven of the present invention, a transformer assembly having a transformer and a container for storing the cooling material for cooling the transformer therein, and a fastening unit for fastening the transformer assembly to the electrical equipment compartment of the microwave oven, The distance from the centerline of the vessel to the fastening unit of the trans assembly is shorter than the distance from the centerline of the vessel to the outer surface of the vessel.

The container includes a base portion constituting the bottom of the container and an extension portion bent downwardly extending from at least one end of the base portion, and a fastening portion bending inwardly from the extension portion to be spaced apart from the base portion by a predetermined distance. It is characterized in that the fastening portion and the bottom plate of the electrical equipment compartment.

On the other hand, the trans assembly includes a bracket fixed to one side of the container, the bracket is fixed to one side of the container, an extension part bent downwardly extending from at least one end of the fixing portion, and the high And a fastening part bent from the extension part so as to be spaced apart from the government by a predetermined distance, and the fastening unit is configured to fix the fastening part and the bottom plate of the electrical equipment compartment.

Further, in the microwave trans assembling method of the present invention, one end of the cylindrical side plate is coupled to the base plate, the transformer is inserted into the side plate to be fixed to the base plate, and the top surface is formed at the other end of the side plate. Combining the plates to form a container, and injecting oil into the container.

The joining of the side plate and the base plate is performed by brazing welding.

The base plate and the transformer are fixed by spot welding.

Combination of the side plate and the base plate further comprises fixing the bracket for fastening with the microwave oven to the base plate, the fixing of the base plate and the transformer is the transformer and the base plate and the bracket It is characterized in that fixed at one time.

Combination of the side plate and the top plate is provided with an input line for applying power to the transformer and an output line for applying the power transformed from the transformer to the outside, the input line and the output line is And coupling the installed top plate to the side plate.

Installation of the input line and the output line includes preparing a top plate provided with a through hole, passing the input line and the output line through the through hole, and epoxy treating the through hole.

Installation of the input line and the output line includes preparing an upper surface plate provided with a terminal portion, and connecting the input line and the output line to the terminal portion.

The injection of oil may include preparing an upper surface plate provided with an oil injection hole, injecting oil through the oil injection hole, and sealing the oil injection hole.

The oil is injected to a predetermined level which is lower than the top plate of the vessel and higher than the top of the coil of the transformer.

The oil is injected to a predetermined level which is lower than the top of the core of the transformer and higher than the top of the coil of the transformer.

The combination of the cylindrical side plate and the base plate is prepared by preparing a cylindrical side plate having an inner surface having at least two points different from the center, and coupling one end of the side plate to the base plate. It includes.

In addition, in the method of assembling the microwave oven assembly of the present invention, one end of the cylindrical side plate is coupled to the base plate, and the transformer is inserted into the side plate to fix the base plate, and the side plate and the Injecting the oil into the container made of a base plate, and comprises coupling the top plate to the other end of the side plate.

The joining of the side plate and the base plate is performed by brazing welding.

The base plate and the transformer are fixed by spot welding.

Combination of the side plate and the base plate further comprises fixing the bracket for fastening with the microwave oven to the base plate, the fixing of the base plate and the transformer is the transformer and the base plate and the bracket It is characterized in that fixed at one time.

Combination of the side plate and the top plate is provided with an input line for applying power to the transformer and an output line for applying the power transformed from the transformer to the outside, the input line and the output line is And coupling the installed top plate to the side plate.

Installation of the input line and the output line includes preparing a top plate provided with a through hole, passing the input line and the output line through the through hole, and epoxy treating the through hole.

Installation of the input line and the output line includes preparing an upper surface plate provided with a terminal portion, and connecting the input line and the output line to the terminal portion.

The oil is injected to a predetermined level which is lower than the top of the vessel and above the top of the coil of the transformer.

The oil is injected to a predetermined level which is lower than the top of the core of the transformer and higher than the top of the coil of the transformer.

The combination of the cylindrical side plate and the base plate is prepared by preparing a cylindrical side plate having an inner surface having at least two points different from the center, and coupling one end of the side plate to the base plate. It includes.

Hereinafter, like reference numerals designate like elements on the same names and drawings, and repeated constructions and descriptions thereof will be omitted or compressed for the sake of brevity and clarity. It will be described in more detail with reference to.

1A is one embodiment of a trans assembly of the present invention. The transformer assembly 10 includes a transformer 11 having a core 111 and a coil 112 wound around the core 111 and a container 12 in which the transformer 11 is housed. The coil 112 includes a lower primary winding connected to a power supply and an upper secondary winding producing power transformed by electromagnetic induction by the primary winding. The container 12 has a sealed structure, and has a base plate 123 to which the transformer 11 is fixedly coupled, and a cover part that is coupled to the base plate 123 and covers the transformer 12. The cover part is composed of a side plate 121 forming a side of the container and an upper plate 122 forming an upper portion. The side plate 121 has a cylindrical or polygonal cylindrical shape and has a corrugated structure to achieve effective heat dissipation and to cope with thermal expansion. This corrugation is formed such that the inner surface of the container has at least two points at different distances from the center of the container. That is, the corrugation structure of the side plate 121 is better by widening the contact area for the heat radiation of the resistance heat generated by the resistance heat of the coil 112 and the eddy current on the core 111 according to the operation of the transformer 11. It gives a cooling effect.

On the other hand, when the heat generated from the internal transformer 11 reaches the container 12, the container 12 preferably has copper and aluminum having good heat dissipation efficiency and good moldability. Smaller aluminum may be more desirable in view of the reduced production cost and weight of the trans assembly.

On the other hand, the container 12 contains a liquid and non-conductive oil 105 as a cooling material for cooling the transformer 11. The oil 105 employed as the cooling material may be any kind of oil, but mineral oil is most preferable in consideration of environmental pollution and human health. Of course, it is not necessary to consider oil as a cooling material, and other liquids which are non-conductive, colloidal materials in a sol or gel state are also preferable. As such, the liquid or colloidal material including the oil 105 as a cooling material absorbs vibration and sound waves generated from the transformer 11 when the transformer 11 is operated, thereby greatly reducing vibration and noise phenomena caused by the operation. There is a big advantage that can be reduced.

At this time, the oil 105 is preferably filled so that the heating portion is locked. Therefore, at least the coil must be filled to the point where it is locked, and both the coil and the core may be filled to the point of being locked. On the other hand, since the amount of oil is preferably reduced as much as possible while sufficiently exhibiting the cooling effect, it is particularly preferable to fill the gap between the upper end of the core 111 and the upper end of the coil 112. The upper portion of the oil 105 may be maintained in a vacuum in the empty space 17.

On the other hand, reference numeral 122a denotes an oil injection hole for injecting the oil 105 into the container 12. Of course, the oil injection hole 122a is an assembly method of injecting oil after combining both the base plate 123 and the top plate 122 to the side plate 121 when assembling the trans assembly 10. If necessary, if the base plate 123 is coupled to the side plate 121 in the case of injecting oil before the top plate 122 is coupled, such an oil injection hole will not be required.

On the other hand, the transformer is generally connected to an input line for inputting a low-voltage external power source and an output line for outputting the transformed power source generated by electromagnetic induction. In this embodiment, the input line 14 and the output line ( 15 is connected to the transformer 11 in the container 12 through the top plate 122 of the container 12. In more detail, the input line 14 is connected to the primary winding of the coil 112, and the output line 15 is connected to the secondary winding of the coil 112. Therefore, the container 12 has to form a through hole 16 for passing the input line 14 and the output line 15, in the present embodiment, the through hole 16 in the upper plate 122 of the container ) Is formed. At this time, the container 12 must maintain a sealing force so that the oil 105 contained in the container 12 does not leak, so that the input line 14 and the output line 15 pass through ( 16) is treated with epoxy 18 to maintain the seal.

Meanwhile, FIG. 1B shows another embodiment in which a terminal portion 19 for connecting the input line 14 and the output line 15 to the external power source and the magnetron side, respectively, is provided on the top plate 122 forming the top surface of the container 12. Is showing. While the terminal portion 19 can maintain the sealing force of the container 12, the terminal plate 19 electrically connects the inside and the outside of the top plate 122, that is, the inside and outside of the container 12. Therefore, the trans assembly 10 having the upper plate 122 provided with the terminal portion as described above is more preferable because it does not have to have a process such as an epoxy treatment for a separate sealing, such as the trans assembly shown in FIG. .

As described above with reference to Figures 1a, 1b has described a trans assembly that can realize the cooling of the transformer by a cooling material containing a liquid, hereinafter the structure of such a trans assembly is mounted on a microwave oven This will be described with reference to Figs. 2A to 3C.

2A to 2D show a structure in which the transformer assembly 10 as in the embodiment of FIG. 1 is mounted to the bottom plate 118 of the electronics compartment of the microwave oven via the bracket 20.

Referring first to FIG. 2A, the bracket 20 is fixed to the base plate 123 of the container 12 in contact with the fixing part 201 and from the fixing part further outward from the side plate 121 of the container. It has an engaging portion 202 extending. The coupling part 202 and the bottom plate 118 of the electrical equipment room are fastened through the fastening unit. That is, screw holes 2 and 118a are respectively formed in the coupling part 202 of the bracket 20 and the bottom plate 118 of the electrical equipment compartment of the microwave oven, and they are fastened through the screws 119.

Meanwhile, referring to FIGS. 2B and 2C, the brackets 21 and 22 may include fixing parts 211 and 221 fixedly coupled to the base plate 123 of the container 12 and the fixing parts 211 and 221. Extension parts 212a and 222a which are bent downwardly at both ends and bent outwardly from the extension parts 212a and 222a so as to be spaced apart from the fixing parts 211 and 221 by a predetermined distance. And coupling parts 212 and 222 having fastening parts 212b and 222b fastened to 118. Screw holes 2 are formed in the fastening portions 211b and 222a to be screwed with the bottom plate 118 of the electrical equipment compartment. On the other hand, as in the embodiment shown in Figure 2c, it is preferable that the fastening position of the bracket 22 and the bottom plate 118 of the electrical equipment compartment is located inside the side plate 121 of the container 12. Do. That is, when the distance from the center line C of the transformer to the fastening position (or the fastening unit) is R1, and the distance from the center line C of the transformer to the side plate 121 is R2, R1 is smaller than R2. It is preferable. In this structure, as shown in the embodiments shown in FIGS. 2A and 2B, the coupling part of the trans assembly can solve the problem of occupying a separate side space, thereby maximizing the use of the space of the electrical compartment and the width of the electrical compartment. There is an advantage that can be realized by miniaturizing the microwave oven.

Meanwhile, in the case of the embodiment illustrated in FIG. 2D, the fixing part 231 fixedly coupled to the base plate 123 of the container, and the extension part 232a downwardly bent at both ends of the fixing part 231. And a coupling part having a fastening part 232b which is bent inwardly from the extension part 232a so as to be spaced apart from the fixing part 231 by a predetermined distance, and fastened and coupled to the bottom plate 118 of the electrical equipment room formed in the microwave. By applying the bracket 23 made of 232 may have the same advantages as in Fig. 2c. That is, in this embodiment, the distance R1 from the centerline C of the transformer to the fastening position (or the fastening unit) is smaller than the distance R2 from the centerline C of the transformer to the side plate 121. By mounting the bracket 23 and the bottom plate 118 of the electrical equipment compartment located inside the side plate 121 of the transformer assembly 10, the installation space of the transformer assembly in the electrical equipment compartment can be reduced as much as possible.

Of course, the fastening unit of the bottom plate 118 and the transformer assembly 10 of the electrical equipment compartment in Figures 2a to 2d illustrates a screw 119, which is relatively easy to fasten, but it does not necessarily need to be screwed, It may be any structure that allows the transformer assembly to be fixedly coupled, such as a bolt hole for bolting similar to a screw coupling or a rivet hole for riveting, or a welding structure for welding.

3A to 3C illustrate an embodiment in which the base plate 123, which is one surface of the container 12, forms the bracket itself, and thus the base plate itself may be fixedly coupled to the microwave oven body.

As shown in FIG. 3A, in this embodiment, the base plate 123 further protrudes outward from the base portion 301 forming the bottom of the container 12 and the side plate 121 of the container 12 so as to provide a screw hole ( 2) is formed to have a coupling portion 302 that can form a screw 119 and the bottom plate 118 of the electrical equipment room formed in the microwave oven.

As shown in FIG. 3B, in this embodiment, the base plate 123 extends downwardly bent at both ends of the base part 311 forming the bottom of the container 12 and at both ends of the base part 311. Coupling having a fastening part 312b which is bent outwardly from the extension part 312a so as to be spaced apart from the base part 311 and the base part 311 by the bottom plate 118 of the electrical equipment room formed in the microwave. Section 312.

As shown in FIG. 3C, in this embodiment, the base plate 123 is a base portion 321 forming the bottom of the container 12 and an extension extending downwardly bent at both ends of the base portion 321. The fastening part 322b which is bent inwardly from the extension part 322a to be spaced apart from the base part 322 and the base part 321 by the bottom plate 118 of the electrical equipment room which is spaced in the microwave. The branch includes a coupling portion 322. This configuration is similar to the embodiment shown in Figs. 2C and 2D, in which the distance R1 from the centerline C of the transformer to the fastening position is smaller than the distance R2 from the centerline C of the trans to the side plate 121. In order to reduce the installation space of the transformer assembly in the electrical equipment compartment, the mounting position of the bracket 23 of the transformer and the bottom plate 118 of the electrical equipment compartment is located inside the side plate 121 of the transformer assembly 10. There is an advantage that can utilize the width space of the electronics compartment and realize the miniaturization of the microwave oven.

As described above, in the case of the trans assembly 10 in which the base plate 123, which is one surface of the container 12, is configured to form the bracket itself, the base plate of the container as in the trans assembly of FIGS. The work of sealing the 123 to the side plate of the container and the dual work process of combining the separate brackets 201, 211, 221, and 231 to the base plate directly act as a bracket. Since it is completed by one process of hermetically coupled to the side plate 121 of), it can bring about not only the reduction of material cost but also the simplification of the production process, thereby improving productivity.

4A and 4B are working flowcharts illustrating a method of assembling a trans assembly having the above configuration in a chronological order. Looking at the embodiment of the assembly method shown in Figure 4a, first the side plate forming the side of the container is coupled to the base plate (401), the transformer is fixed to the base plate (402). Next, an input line for inputting external power to the transformer and an output line for outputting the transformed power to the magnetron side are installed on the top plate of the container (403), and the top plate is coupled to the side plate (404). Oil is injected into the interior of the vessel (405).

The case where it is preferable as a specific work process in the above procedure is as follows. Coupling 401 of the side plate and the base plate is preferably performed by brazing welding for the prevention of oil leakage and the sealing force of the container. In addition, the side plate uses a corrugated structure to widen the heat dissipation area. More specifically, first, a cylindrical side plate having an inner surface having at least two points different from the center is prepared, and one end of the side plate is coupled to the base plate.

The fixing of the base plate and the transformer 402 is performed by spot welding for the firmness of the fixing. In addition, when a separate bracket is provided, such as the transformer assembly shown in Figs. 2a to 2d, it is also possible to fix the trans, base plate, and bracket together by spot welding by placing the bracket. To this end, the bracket for fastening with the microwave oven is fixed to the base plate, and the transformer, the base plate and the bracket are fixed at once.

In the step 403 of installing the input line and the output line on the top plate of the container, when the through hole is formed on the top plate of the container, it is preferable to pass through the input line and the output line and then epoxy treatment on the through hole. When the terminal portion is provided on the top plate of the container as the transformer assembly described with reference to FIG. 1B, the input line and the output line may be connected to the terminal portion.

The step of injecting the oil 405 prepares a top plate provided with an oil injection hole, injects oil through an oil injection hole formed in the top plate of the container, and after injecting oil, the oil for sealing force of the container. Sealing the injection hole (405a). Wherein the oil is injected to a predetermined level which is lower than the top plate of the vessel and higher than the top of the coil of the transformer. Since the coil is the main heating element, it is preferable to fill the oil at least so that the coil can be completely submerged. Since the core is also a heat-generating part, the core can be filled to the point where the core is submerged, and the oil can be filled to a predetermined level lower than the top of the core of the transformer and higher than the top of the coil of the transformer in order to minimize the oil injection amount without compromising cooling effect. It can also be injected.

On the other hand, looking at the embodiment shown in Figure 4b, since the bonding order of the oil injection and the upper plate and the embodiment shown in Figure 4a is different and the remainder is substantially the same description of the same parts will be omitted. Referring to FIG. 4B, the side plate constituting the side of the container is coupled to the base plate (406), the transformer is fixed to the base plate (407), and the input line and the transformed power supply to the external power to the transformer magnetron An output line outputted to the side is provided 408 on the upper plate of the container. Next, oil is injected 409 into the inside of the container, and the top plate is coupled to the side plate 410. If the above order is maintained, the oil injection hole is changed in the operation sequence described in 4a because, unlike the work sequence of FIG. Not only can the operation of sealing be omitted, but also no need to form an oil injection hole in the top plate is preferable.

On the other hand, Figure 5 shows an embodiment of a microwave oven according to the present invention employing a transformer assembly 10 having a configuration as described with reference to Figures 2a to 3c, more specifically represented in Figure 3c The state in which the trans assembly 10 is fixed to the bottom surface, which is one surface of the electronics compartment 501 of the microwave oven, is schematically illustrated. When power normally used from the outside during the microwave operation is applied to the transformer 11, the power boosted from the transformer 11 by electromagnetic induction is input to the magnetron 503, the magnetron 503 is a high frequency It generates and radiates to the cooking chamber 502. In continuous microwave operation, the transformer 11 emits high temperature heat by resistance heat generated from the coils and cores constituting the transformer 11 and the heat is generated by the mineral oil contained in the vessel 12 of the transformer assembly. Immediately absorbed and convection leads to the vessel 12. At this time, since the side plate of the container 12 has a large heat dissipation area due to the corrugated structure, it is air-cooled by the operation of the cooling fan 504 for forcibly introducing external cold air into the electrical equipment compartment 501. The cooling action of the transformer occurs immediately and quickly because the mineral oil 105 directly encapsulates the transformer 11 itself, thereby forming a liquid cooling system with excellent cooling efficiency, and heat absorbed by the mineral oil is radiated by convection. The large area 10 may be reached, and the cooling fan 504 may exit the outside air in a shorter time. Therefore, even if the microwave is continuously operated so that the transformer 11 is continuously operated, the problem that the efficiency of the transformer 11 is reduced is substantially reduced and a stable output can be maintained.

In addition to the above description, a person having ordinary knowledge in the art to which the present invention pertains may easily implement other forms of the present invention within the same category as described above.

As described in detail above, the present invention, first, to increase the cooling efficiency of the transformer mounted on the microwave to increase the operating efficiency of the transformer, and secondly, due to the excessive amount of the core or coil according to the conventional operating efficiency of the transformer Part of the composition can be deleted to reduce the production cost of the transformer, and secondly, it is possible to reduce the size and weight of the microwave transformer due to the removal of the dense metal and the addition of the less dense cooling material and container. .

In addition, by presenting a coupling configuration of the transformer and the sealed container containing the transformer, the transformer can be securely fixed to the container, and the sealing force of the container is increased.

On the other hand, in the case of employing a non-conductive liquid as a cooling material, by providing a configuration for effectively mounting the transformer assembly in the microwave, firstly, the workability is improved by simplifying the assembly work, and secondly, The space can be saved as much as possible, so that the space in the electrical equipment room can be utilized for other purposes, or the width of the electrical equipment room can be reduced to pursue the miniaturization of the microwave oven.

In addition, by forming the oil and colloidal material as a cooling material, vibration and noise during the trans operation can be reduced, thereby significantly improving the reliability of the product.

Claims (57)

A transformer for applying a high voltage to the magnetron in a microwave oven; A container accommodating the transformer therein and including a base plate coupled to the microwave oven and a cover portion coupled to the base plate; And a cooling material contained in the container to cool the transformer. The method of claim 1, The cooling material is a microwave assembly for a microwave oven, characterized in that the mineral oil. The method of claim 1, Wherein said container comprises an inner surface having at least two points that differ in distance from the center thereof. The method of claim 1, The material of the container is a microwave assembly for a microwave oven, characterized in that the copper. The method of claim 1, And the transformer and the base plate are fixed by spot welding. The method of claim 1, The cover unit and the base plate is a microwave oven assembly, characterized in that coupled by brazing welding. The method of claim 1, The base plate is a base portion constituting the bottom of the container, an extension portion which is bent downwardly extending at both ends of the base portion, and bent outwardly from the extension portion to be spaced apart from the base portion to be fastened to the microwave oven Transformer assembly for a microwave, characterized in that it comprises a fastening portion to be coupled. The method of claim 1, The base plate is a base portion constituting the bottom of the container, an extension portion which is bent downwardly extending at both ends of the base portion, and bent inwardly from the extension portion to be spaced apart from the base portion to be fastened to the microwave oven Transformer assembly for a microwave, characterized in that it comprises a fastening portion to be coupled. The method of claim 1, The transformer has a primary winding connected to an external power source, a secondary winding for producing power transformed by electromagnetic induction by the primary winding, an input line for supplying external power to the primary winding, and the secondary An output line for outputting the power transformer transformed from the winding to the magnetron, The cover part, the microwave oven assembly, characterized in that it comprises a terminal portion for connecting the input line and the output line with an external power source and the magnetron side, respectively. The method of claim 9, And said terminal portion is integrally blocked. A transformer for applying a high voltage to the magnetron in a microwave oven; A container containing the trans; A cooling material contained in the container to cool the trans; And a bracket coupled to one side of the container to couple the container to the microwave oven. The method of claim 11, The transformer, one side of the container, the transformer assembly for a microwave, characterized in that the bracket is fixed by the spot. The method of claim 11, The container is a transformer assembly for a microwave, characterized in that the base plate to which the transformer is fixed, and a cover portion that is brazed to the base plate. The method of claim 11, The bracket may be fixed to one side of the container, an extension part which is bent downwardly from both ends of the fixing part, and an extension part which is bent outwardly from the extension part so as to be spaced apart from the fixing part by a predetermined distance. Transformer assembly for a microwave, characterized in that it comprises a fastening coupled to the coupling. The method of claim 11, The bracket may be fixed to one side of the container, an extension part which is bent downwardly from both ends of the fixing part and extended, and bent inwardly from the extension part so as to be spaced apart from the fixing part by a predetermined distance to the microwave oven. Transformer assembly for a microwave, characterized in that it comprises a fastening coupled to the coupling. The method of claim 11, The transformer has a primary winding connected to an external power source, a secondary winding for producing power transformed by electromagnetic induction by the primary winding, an input line for supplying external power to the primary winding, and the secondary An output line for outputting the power transformer transformed from the winding to the magnetron, The cover part, the microwave oven assembly, characterized in that it comprises a terminal portion for connecting the input line and the output line with an external power source and the magnetron side, respectively. The method of claim 16, And said terminal portion is integrally blocked. cuisine; An electrical equipment compartment partitioned with the cooking chamber; A magnetron installed in the electrical equipment room to radiate high frequency to the cooking chamber; A transformer for applying a high voltage to the magnetron; A container accommodating the trans, and including a base plate installed in the electrical equipment compartment and a cover portion coupled to the base plate; And a cooling material contained in the container to cool the transformer. The method of claim 18, The cooling material is a microwave oven, characterized in that the mineral oil. The method of claim 18, And the container comprises an inner surface having at least two points that differ in distance from the center thereof. The method of claim 18, Microwave oven characterized in that the material of the container is aluminum or copper. The method of claim 18, And the transformer and the base plate are fixed by spot welding. The method of claim 18, And the cover part and the base plate are joined by brazing welding. The method of claim 18, The base plate is a base portion constituting the bottom of the container, an extension portion which is bent downwardly extending at both ends of the base portion, and bent outwardly from the extension portion to be spaced apart from the base portion to be fastened to the microwave oven Microwave oven comprising a coupling to be coupled. The method of claim 18, The base plate is a base portion constituting the bottom of the container, an extension portion which is bent downwardly extending at both ends of the base portion, and bent inwardly from the extension portion to be spaced apart from the base portion to be fastened to the microwave oven Microwave oven comprising a coupling to be coupled. The method of claim 18, The transformer has a primary winding connected to an external power source, a secondary winding for producing power transformed by electromagnetic induction by the primary winding, an input line for supplying external power to the primary winding, and the secondary An output line for outputting the power transformer transformed from the winding to the magnetron, The cover part, the microwave oven, characterized in that it comprises a terminal portion for connecting the input line and the output line with an external power source and the magnetron side, respectively. The method of claim 27, And the terminal portion is integrally blocked. cuisine; An electrical equipment compartment partitioned with the cooking chamber; A magnetron installed in the electrical equipment room to radiate high frequency to the cooking chamber; A transformer for applying a high voltage to the magnetron; A container containing the trans; A cooling material contained in the container to cool the trans; And a bracket coupled to one side of the container to couple the container to the electrical equipment compartment. The method of claim 28, Microwave oven, characterized in that the transformer, one side of the container, the bracket is fixed by a spot point. The method of claim 28, The container comprises a base plate to which the transformer is fixed, and a cover portion that is brazed to the base plate. The method of claim 28, The bracket may be fixed to one side of the container, an extension part which is bent downwardly from both ends of the fixing part, and an extension part which is bent outwardly from the extension part so as to be spaced apart from the fixing part by a predetermined distance. Microwave oven comprising a fastening coupled to the coupling. The method of claim 28, The bracket may be fixed to one side of the container, an extension part which is bent downwardly from both ends of the fixing part and extended, and bent inwardly from the extension part so as to be spaced apart from the fixing part by a predetermined distance to the microwave oven. Microwave oven comprising a fastening coupled to the coupling. The method of claim 28, The transformer has a primary winding connected to an external power source, a secondary winding for producing power transformed by electromagnetic induction by the primary winding, an input line for supplying external power to the primary winding, and the secondary An output line for outputting the power transformer transformed from the winding to the magnetron, The cover part, the microwave oven, characterized in that it comprises a terminal portion for connecting the input line and the output line with an external power source and the magnetron side, respectively. A transformer assembly having a transformer therein and a container accommodating a cooling material for cooling the transformer, and a fastening unit for fastening the transformer assembly to an electrical equipment compartment of the microwave oven, the transformer assembly from a centerline of the container. Microwave oven characterized in that the distance to the fastening unit of the shorter than the distance from the centerline of the container to the outer surface of the container. The method of claim 34, The container includes a base forming the bottom of the container, an extension extending downwardly bent from at least one end of the base portion, and a fastening portion bending inwardly from the extension so as to be spaced apart from the base by a predetermined distance. The fastening unit is a microwave oven, characterized in that for fixing the fastening unit and the bottom plate of the electrical equipment room. 36. The method of claim 35 wherein The trans assembly includes a bracket fixed to one side of the container, The bracket includes a fixing part fixed to one surface of the container, an extension part bent downwardly extending from at least one end of the fixing part, and a fastening part bent from the extension part so as to be spaced apart from the fixing part by a predetermined distance. The fastening unit is a microwave oven, characterized in that for fixing the fastening unit and the bottom plate of the electrical equipment room. One end of the cylindrical side plate to the base plate, Insert the trans inside the side plate to fix the base plate, The upper plate is coupled to the other end of the side plate to form a container, Assembling a transformer assembly for a microwave oven comprising injecting oil into the container. The method of claim 37, The method of assembling the transformer assembly for a microwave oven, characterized in that the coupling between the side plate and the base plate is performed by brazing welding. The method of claim 37, Fixing of the base plate and the transformer is a method of assembling a transformer assembly for a microwave oven, characterized in that performed by spot welding. The method of claim 37, Combination of the side plate and the base plate further comprises fixing the bracket for fastening with the microwave oven on the base plate, Fixing the base plate and the transformer is a method of assembling the transformer assembly, characterized in that for fixing the transformer, the base plate and the bracket at once. The method of claim 37, Combination of the side plate and the top plate is provided with an input line for applying power to the transformer and an output line for applying the power transformed from the transformer to the outside, the input line and the output line is A method of assembling a trans assembly for a microwave oven comprising coupling the installed top plate to the side plate. The method of claim 41, wherein The installation of the input line and the output line, preparing a top plate provided with a through hole, passing the input line and the output line through the through hole, and assembling the transformer assembly for a microwave oven comprising the step of epoxy treatment. The method of claim 41, wherein The installation of the input line and the output line includes preparing a top plate provided with a terminal portion, and connecting the input line and the output line to the terminal portion. The method of claim 37, The injection of the oil, a method for assembling a transformer assembly for a microwave including preparing an upper surface plate provided with an oil injection hole, injecting oil through the oil injection hole, and sealing the oil injection hole. The method of claim 44, And the oil is injected to a predetermined level lower than the top plate of the container and higher than an upper end of the coil of the transformer. The method of claim 44, And the oil is injected to a predetermined level which is lower than an upper end of the core of the transformer and higher than an upper end of the coil of the transformer. The method of claim 37, The combination of the cylindrical side plate and the base plate is prepared by preparing a cylindrical side plate having an inner surface having at least two points different from the center, and coupling one end of the side plate to the base plate. Assembly method of a transformer assembly for a microwave oven comprising the. One end of the cylindrical side plate to the base plate, Insert the trans inside the side plate to fix the base plate, Injecting oil into the container consisting of the side plate and the base plate, Assembling a trans assembly for a microwave oven comprising coupling the top plate to the other end of the side plate. The method of claim 48, The method of assembling the transformer assembly for a microwave oven, characterized in that the coupling between the side plate and the base plate is performed by brazing welding. The method of claim 48, Fixing of the base plate and the transformer is a method of assembling a transformer assembly for a microwave oven, characterized in that performed by spot welding. The method of claim 48, Combination of the side plate and the base plate further comprises fixing the bracket for fastening with the microwave oven on the base plate, Fixing the base plate and the transformer is a method of assembling the transformer assembly, characterized in that for fixing the transformer, the base plate and the bracket at once. The method of claim 48, Combination of the side plate and the top plate is provided with an input line for applying power to the transformer and an output line for applying the power transformed from the transformer to the outside, the input line and the output line is A method of assembling a trans assembly for a microwave oven comprising coupling the installed top plate to the side plate. The method of claim 52, wherein The installation of the input line and the output line, preparing a top plate provided with a through hole, passing the input line and the output line through the through hole, and assembling the transformer assembly for a microwave oven comprising the step of epoxy treatment. The method of claim 52, wherein The installation of the input line and the output line includes preparing a top plate provided with a terminal portion, and connecting the input line and the output line to the terminal portion. The method of claim 48, And the oil is injected to a predetermined level lower than the upper end of the container and higher than the upper end of the coil of the transformer. The method of claim 48, And the oil is injected to a predetermined level which is lower than an upper end of the core of the transformer and higher than an upper end of the coil of the transformer. The method of claim 48, The combination of the cylindrical side plate and the base plate is prepared by preparing a cylindrical side plate having an inner surface having at least two points different from the center, and coupling one end of the side plate to the base plate. Assembly method of a transformer assembly for a microwave oven comprising the.