KR19980030352U - High Pressure Transformer Assembly Structure of Microwave Oven - Google Patents

Abstract

The present invention discloses a high pressure transformer assembly structure of a microwave oven.

The present invention is formed integrally extending from one side of the bottom plate toward the bottom, the inner surface is formed with a substantially rectangular seating groove, the bottom surface of the seating groove 4 seating portion formed with a through hole; Fixing plates are welded and fixed to both sides of the lower side of the core on both sides thereof, the center surface of the bracket is inserted into the seating groove of the seating plate and the insertion plate is formed extending through the insertion hole formed in the position corresponding to the through hole of the mounting groove; It is included, assembling the high-pressure transformer on the bottom plate through a bracket fixed to the bottom plate and the mounting plate having a mounting groove provided on the bottom plate, very easy to assemble, especially the shape of the entire bracket This reduction in size makes it possible to effectively utilize the space inside the drive chamber. In addition, by securing a sufficient space between the lower surface of the bracket and the core has the advantage of preventing vibration noise.

Description

High Pressure Transformer Assembly Structure of Microwave Oven

The present invention relates to a microwave oven, and more particularly, to an assembly structure of a high voltage transformer provided to apply a high voltage to a magnetron.

In general, a microwave oven cooks food with frictional heat generated by molecular motion by irradiating food with microwaves that are oscillated from a magnetron.

1 and 2, the inside of a cabinet Ca having a door Do on the front thereof has a substantially rectangular cavity Cv for cooking food Fo. ) And drive chamber Dr.

In addition, a tray (Te) in which a vessel Ve is placed on the bottom of the cooking chamber Cv, and a tray motor Tm for rotating the tray Tr. Are mounted respectively.

In addition, a magnetron Ma and a high-voltage transformer Ht for oscillating high frequency are provided in the drive chamber Dr of the cabinet Ca, respectively, and the high frequency oscillated from the magnetron Ma is dispersed in the cooking chamber Cv. A wave guide (Wg) is installed to cool the air, and a cooling fan assembly (Cf) is installed to cool them or blow air to the cooking chamber Cv. In addition, a function selection button is formed on a control panel Cp provided in the front panel so as to be connected to each other.

Therefore, the high frequency is oscillated from the magnetron Ma of the driving chamber Dr by the pressing operation of the function selection button on the control panel Cp, and is dispersed into the cooking chamber Cv through the wave guide Wg. Cooked

On the other hand, in such a microwave oven, the high voltage transformer Ht performs an operation of boosting the voltage of an external power source and applying it to the magnetron Ma. As shown in FIG. 3, the core ( 1) and first and secondary coils 3 and 2 wound on the core 1 in a large number.

The high pressure transformer Ht having such a configuration is fixedly installed on the bottom plate 10 of the drive chamber Dr. In view of the assembly structure, the lower surface of the core 1 has a plate shape. A bracket 4 is fixedly installed, for example by welding. At this time, both ends of the bracket 4 are protruded to the outside of the core 1, and a plurality of through holes 4a are formed in the protruding portion.

On the other hand, the upper surface of the bottom plate 10 is formed with a guide protrusion 11 for securing an initial position by guiding any one corner of the above-described bracket (4), the through hole (4a) of the bracket (4) The through hole 12 is formed at a position corresponding to the through hole 12.

Therefore, one side edge portion of the bracket 4 fixed to the lower surface of the core 1 is brought into close contact with the guide protrusion 11 formed on the bottom plate 10, and the fixing screw S is removed from the bottom while securing an initial assembly position. By fastening to the through holes 12 and 4a, the core 1 is fixedly installed on the bottom plate 10 as a result.

However, such a conventional high pressure transformer assembly structure has many problems listed below.

First, the task of securing the initial position of the bracket 4 through the guide protrusions 11 formed on the bottom plate 10 is difficult, resulting in poor assembly. This is because only one edge portion of the bracket 4 is limited in position through the guide protrusion 11.

Second, since the overall size of the bracket 4 welded to the lower surface of the core 1 is relatively large, it is not only a factor to increase the overall load, but also takes up a lot of space, thereby enabling efficient space utilization. There was no.

Third, a gap is generated in the process of welding and fixing the plate-shaped bracket 4 to the bottom surface of the core 1 and fixing the plate-shaped bracket 4 on the bottom plate 10 again through the fixing screw S. Vibration noise is generated in the process of forming the induction magnetic force through the secondary coils 3 and 2.

Fourth, the guide protrusions 11 formed on the bottom plate 10 are formed with the step of bending and bending the bottom plate 10, so that the strength of the portion where the guide protrusions 11 are formed is relatively low. have.

The present invention has been devised to solve such a conventional problem, the assembly of the whole unit is very easy to improve the assemblage, in particular of the microwave oven that can prevent vibration noise and lowering the strength of the bottom plate Its purpose is to provide a high pressure transformer assembly structure.

In order to achieve the above object, a high voltage transformer assembly structure of a microwave oven according to the present invention, in assembling a high pressure transformer having a core wound with first and second coils on a bottom plate of a microwave driving room, A seating plate extending integrally from one side of the bottom plate toward the bottom, and having a substantially rectangular seating groove formed on an inner surface thereof, and having a through hole formed at a bottom edge of the seating groove; Fixing plates welded and fixed to both lower sides of the core are formed on both sides thereof, and an insertion plate having a through-hole formed at a position corresponding to the through-hole of the seating groove is inserted into the seating groove of the seating plate. Bracket; characterized in that the included.

1 and 2 are a perspective view and a cross-sectional view showing a typical microwave oven.

Figure 3 is a perspective view showing a conventional high pressure transformer assembly structure.

Figure 4 is a perspective view showing a high pressure transformer assembly structure according to the present invention.

Figure 5 is a side view showing the assembly process.

Explanation of symbols for main parts of the drawings

10: bottom plate 20: high pressure transformer

21: core 23,22: primary and secondary coil

30: seating plate 31: seating groove

32,43a: Through hole 40: Bracket

41, 42: fixed plate 43: insert plate

Dr: drive room

Such a characteristic configuration and the resulting effects of the present invention will become more apparent from the detailed description of the invention with reference to the accompanying drawings to be described later.

Figure 4 is a perspective view of the main portion extract showing the high pressure transformer assembly structure of the microwave oven according to the present invention, Figure 5 is a side view showing a coupling state. Hereinafter, a description will be given with reference to FIGS. 1 and 2.

As shown in the high voltage transformer assembly structure of the microwave oven according to the present invention, the high voltage transformer (hige voltage transformer; 20) for applying a high voltage voltage on the Mark netron (Ma) is large core 21 And primary and secondary coils 23 and 22 wound on the core 21 in large numbers.

The mounting plate 30 is formed in one side of the bottom plate 10 of the drive chamber Dr on the side where the core 21 of the high pressure transformer 20 is installed to form a substantially rectangular seating groove 31 toward the lower side. ) Is integrally formed to extend. In addition, a through hole 32 is formed on the bottom surface of the square groove 31 of the seating plate 30, that is, at a portion adjacent to the four edge portions.

In this case, the seating plate 30 may be preferably formed in an integral manner by deep drawing processing one side of the bottom plate 10 in terms of preventing a decrease in strength of the bottom plate 10.

In addition, it is more preferable to form a plurality of through-holes 31a in the four side portions of the seating groove 31, in order to discharge the hot heat generated in the driving process of the high-voltage transformer 20 to the outside. That is, to obtain a heat dissipation effect.

Meanwhile, a bracket 40 is positioned on the lower surface of the core 21 of the high pressure transformer 20, and the bracket 40 is fixed to the both sides of the core 21 by welding to the lower surface of the core 21. 41 and 42, and in particular, the center surface of the center plate is provided with an insertion plate 43 extending to be inserted into the rectangular seating groove 31 of the bottom plate 10 described above.

At this time, on the insertion plate 43, that is, a through hole 43a of the same diameter is formed at a position corresponding to the through hole 32 formed in the bottom surface of the seating groove 31 of the seating plate 30 described above.

Looking at the assembly process of the high-voltage transformer of the present invention having such a configuration, first, the fixing plates 41 and 42 of the bracket 40 are welded and fixed to the lower surface of the core 21 of the high pressure transformer 20, respectively.

In this case, in welding fixing the fixing plates 41 and 42 to the lower surface of the core 21, sufficient space is secured between the insertion plate 43 of the bracket 40 and the lower surface of the core 21. And the core 21 is prevented by the vibration noise due to the fine gap.

In this way, the bracket 40 is fixed to the lower surface of the core 21, the insertion plate 43 of the bracket 40, the rectangular seating groove 31 on the mounting plate 30 formed on one side of the bottom plate 10 Insert it into That is, the bracket 40 is because the entire edge surface of the insertion plate 43 is guided through the edge side of the seating groove 31 is easy to assemble, as well as to ensure a secure initial assembly position The through holes 32 and 43a coincide with each other exactly. Therefore, by fastening the fixing screw (S) from the bottom of the bottom plate 10, the entire high pressure transformer 20 is firmly fixed to the bottom plate 10.

On the other hand, the high temperature heat generated in the process of driving the high-voltage transformer 20 installed in this way can be radiated through the through hole (31a) formed on the four edge side of the seating plate 30 can improve the cooling efficiency.

As described above, according to the transformer coupling structure of the microwave oven according to the present invention, the high pressure transformer is assembled on the bottom plate through a mounting plate having a seating groove provided on the bottom plate and a bracket fixed to the bottom surface of the core. As a result, the assembly is very easy, and in particular, the shape of the entire bracket is reduced so that space utilization inside the drive chamber can be effectively performed. In addition, by securing a sufficient space between the lower surface of the bracket and the core has the advantage of preventing vibration noise.

Claims (2)

In assembling a high voltage transformer having a core wound with first and second coils on a bottom plate of a microwave driving chamber, It is formed integrally extending from one side surface of the bottom plate 10 toward the bottom, and approximately rectangular seating groove 31 is formed on the inner surface, the through hole 32 in the bottom four corners of the seating groove 31. A seating plate 30 formed with; Fixing plates 41 and 42 which are welded and fixed to both lower surfaces of the core 21 are formed on both side surfaces thereof, and the center surface is inserted into the mounting groove 31 of the seating plate 30 and the seating groove 31. And a bracket (40) having an insertion plate (43) formed therethrough with a through hole (43a) at a position corresponding to the through hole (32) of the microwave oven. The microwave high voltage transformer assembly structure according to claim 1, further comprising a plurality of through holes (31a) formed at the four edge side surfaces of the rectangular seating groove (31) of the bottom plate (10).