CN102192541A

CN102192541A - Microwave oven with novel transformer structure

Info

Publication number: CN102192541A
Application number: CN2010101206107A
Authority: CN
Inventors: 满宏亮; 张国勇
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2010-03-10
Filing date: 2010-03-10
Publication date: 2011-09-21

Abstract

The invention discloses a microwave oven with a novel transformer structure. The microwave oven comprises a microwave oven shell (10); an electrical control chamber (20) is formed in the microwave oven shell (10); a high voltage transformer (30) is arranged in the electrical control chamber (20) of the microwave oven; the high voltage transformer (30) comprises an iron core (1); the iron core (1) is fixedly connected with at least one fixing bracket (4); and the at least one fixing bracket (4) is connected with the microwave oven shell (10) simultaneously. In the microwave oven, the transformer and the microwave oven shell are fixedly connected through an iron fixing bracket, so that the flux leakage of the transformer is greatly reduced, the excitation of the electromagnetic force of the transformer on the microwave oven shell, and the shell vibration caused by the excitation are effectively prevented, the heat radiation area of the transformer is greatly increased simultaneously, the transformer can work below safe temperature, the service life of the transformer is prolonged, and the using safety of the microwave oven is guaranteed.

Description

A kind of micro-wave oven with novel transformer structure

Technical field

The present invention relates to the transformer technology field, particularly relate to a kind of micro-wave oven with novel transformer structure.

Background technology

Micro-wave oven is to produce microwave by electric current, and microwave irradiation surface of heating object in the cavity is come device that article are heated.As everyone knows, micro-wave oven is a kind of modernization cooking kitchen range with microwave heating of food.The microwave that it adopted is a kind of electromagnetic wave.This electromagnetic energy is not only much bigger than common radio wave, but also characteristics are arranged very much, and microwave at a touch metal just reflects, and metal has no idea to absorb or conduct it at all; Microwave can pass insulating materials such as glass, pottery, plastics, but can consumed energy; And contain the food of moisture, and microwave not only can not see through, and its energy can be absorbed on the contrary.Based on these characteristics, micro-wave oven is heat food well, has obtained utilization widely in daily life.

In general, micro-wave oven is divided into single function for microwave oven and multifunction microwave oven, single function for microwave oven is to adopt microwave heating, promptly be a kind ofly to seal, connect the power supply of magnetron after placed within of the food, make it produce high-frequency microwave, by waveguide high-frequency microwave is shone on the food, makes about 2,400,000,000 5 thousand ten thousand times of hydrone internal vibration in a second of food, by the frictional heat that produces between hydrone to cooking food, heating; It is the micro-wave oven of one that multifunction microwave oven adopts microwave heating and other mode of heatings, and common mode of heating has light wave heating and electrothermal tube heating, is also referred to as barbecue type microwave oven.

Fig. 1 is the surface structure stereogram of a kind of micro-wave oven of prior art.Referring to Fig. 1, micro-wave oven is by the furnace chamber of food container and is arranged at furnace chamber one side and is used to install and produce and the electric control chamber and the shell 1 of the various electromagnetic devices of launched microwave constitute, wherein, and the top and both sides of shell 1 formation micro-wave oven, the bottom surface of micro-wave oven is a basal disc, and its back side is dorsal plate.The front portion of described furnace chamber is by fire door 3 sealings, opening and closing fire door 3 can make furnace chamber communicate with the external world or isolate, can prevent when closing fire door 3 that microwave from leaking when culinary art, fire door 3 is provided with furnace door window 4, the right-hand member of described fire door 3 is provided with handle 2, the place ahead, electric field chamber of described fire door 3 sides is provided with panel 5, which is provided with the operation board 7 and the demonstration display window 6 for information about of operation micro-wave oven.

Be provided with the magnetron that is used to generate microwave in the electric control chamber of above-mentioned micro-wave oven, for generation microwave that magnetron is added high pressure, magnetron need be connected with high-tension transformer, by this high-tension transformer household electricity voltage is promoted to be magnetron operation necessary high voltages.

Referring to Fig. 2, Fig. 3, Fig. 4, existing a kind of micro-wave oven transformer as shown in the figure, this micro-wave oven transformer includes iron core 1, primary coil 2 and secondary coil 3 are installed in the described iron core 1, described primary coil 2 is positioned at secondary coil 3 belows, described iron core 1 is made of side by side a plurality of E sections chips and I sections chip, described iron core 1 is used to form closed magnetic circuit, prevent that the magnetic flux that primary coil 2 and secondary coil 3 generate from taking place to leak and these two heats that coil working generated are dissipated, magnetic circuit referring to transformer shown in Fig. 4 arrow, by this magnetic circuit as can be known, because primary coil 2 and secondary coil 3 formed magnetic fluxs all pass through transformer 2 both sides, so the magnetic flux density of transformer 2 both sides is big.

In the daily life, when microwave oven magnetic is worked, if household electricity spread of voltage and fluctuating, can form oscillating current, make the electric current that passes through primary coil 2 and secondary coil 3 increase, thereby primary coil 2 and secondary coil 3 formed magnetic fluxs increase, the magnetic flux density of transformer 2 both sides is excessive easily so, cause the iron core 1 formation magnetic flux of transformer 2 both sides saturated, cause forming flux leakage, therefore electromagnetic force can be disturbed the work of other electronic units in the microwave oven electric control chamber, and the metal shell of micro-wave oven produced the electromagnetic excitation effect, electromagentic resonance takes place and forms noise in microwave oven shell easily, and externally forms serious electromagnetic radiation.

In addition, when in family's utilization voltage instability fluctuation taking place, the heat that primary coil 2 and secondary coil 3 generate increases, above-mentioned micro-wave oven transformer is not easy heat radiation, temperature rises very fast, has had a strong impact on the service life of transformer, injures use of microwave ovens safety.

Summary of the invention

In view of this, the purpose of this invention is to provide a kind of micro-wave oven with novel transformer structure, it is fixedlyed connected with microwave oven shell transformer by the irony fixed mount, significantly reduced the flux leakage of transformer, avoided of excitation and the caused shell vibration of the electromagnetic force of transformer effectively to microwave oven shell, also increased the area of dissipation of transformer simultaneously, guarantee that transformer is operated in below the safe temperature, prolonged the service life of transformer, guaranteed use of microwave ovens safety, thereby strengthened micro-wave oven user's product use experience greatly, expanded the market application foreground of micro-wave oven, be of great practical significance.

For this reason, the invention provides a kind of micro-wave oven of novel transformer structure, include microwave oven shell 10, described microwave oven shell 10 inside are formed with Denso chamber 20, are provided with high-tension transformer 30 in the electric control chamber 20 of described micro-wave oven;

Described high-tension transformer 30 includes iron core 1, is fixedly connected with at least one fixed mount 4 on the described iron core 1, and described fixed mount 4 is connected with microwave oven shell 10 simultaneously.

Preferably, be fixedly connected with a described fixed mount 4 on the right side wall of described iron core 1.

Preferably, between described iron core 1 and the fixed mount 4 for being threaded or welding, between described fixed mount 4 and the microwave oven shell 10 for being threaded.

Preferably, described fixed mount 4 is the fixed mount of irony.

Preferably, primary coil 2 and secondary coil 3 are installed in the described iron core 1, described primary coil 2 is positioned at secondary coil 3 belows.

By above technical scheme provided by the invention as seen, compared with prior art, the present invention proposes a kind of micro-wave oven with novel transformer structure, it is fixedlyed connected with microwave oven shell transformer by the irony fixed mount, significantly reduced the flux leakage of transformer, avoided of excitation and the caused shell vibration of the electromagnetic force of transformer effectively to microwave oven shell, also increased the area of dissipation of transformer simultaneously, guarantee that transformer is operated in below the safe temperature, prolonged the service life of transformer, guaranteed use of microwave ovens safety, thereby strengthened micro-wave oven user's product use experience greatly, expanded the market application foreground of micro-wave oven, be of great practical significance.

Description of drawings

Fig. 1 is the surface structure stereogram of a kind of micro-wave oven of prior art;

Fig. 2 is the surface structure schematic diagram of existing a kind of micro-wave oven transformer;

Fig. 3 is the vertical view of micro-wave oven transformer shown in Figure 2;

Fig. 4 is the cutaway view along the micro-wave oven transformer of A-A line shown in Figure 3;

Fig. 5 is a kind of surface structure schematic diagram with micro-wave oven of novel transformer structure provided by the invention;

Fig. 6 is the three-dimensional structure diagram that the invention provides transformer in a kind of micro-wave oven with novel transformer structure.

The specific embodiment

In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.

Fig. 5 is a kind of surface structure schematic diagram with micro-wave oven of novel transformer structure provided by the invention, and Fig. 6 is the three-dimensional structure diagram that the invention provides transformer in a kind of micro-wave oven with novel transformer structure.

Referring to Fig. 5, Fig. 6, the invention provides a kind of micro-wave oven with novel transformer structure, include microwave oven shell 10, the right-hand member inside of described microwave oven shell 10 is formed with Denso chamber 20;

In the present invention, be provided with the magnetron 40 that is used to generate microwave in the electric control chamber 20 of described micro-wave oven, for generation microwave that magnetron is added high pressure, magnetron 40 need be connected with high-tension transformer 30, by this high-tension transformer 30 household electricity voltage is promoted to be magnetron operation necessary high voltages.

Referring to Fig. 6, described high-tension transformer 30 includes iron core 1, and primary coil 2 and secondary coil 3 are installed in the described iron core 1, and described primary coil 2 is positioned at secondary coil 3 belows;

Need to prove, described iron core 1 is made of side by side a plurality of E sections chips and I sections chip, described iron core 1 is used to form closed magnetic circuit, prevents that the magnetic flux that primary coil 2 and secondary coil 3 generate from taking place to leak and these two heats that coil working generated are dissipated.

In the present invention, be fixedly connected with a fixed mount 4 on the right side wall of described iron core 1, described fixed mount 4 is connected with microwave oven shell 10 simultaneously;

On the specific implementation, between described iron core 1 and the fixed mount 4 for being threaded or welding, between described fixed mount 4 and the microwave oven shell 10 for being threaded;

Need to prove that for the present invention, described fixed mount 4 is not limited to be arranged on the right side wall of iron core 1, as long as fixed mount 4 is fixedly connected iron core 1 and microwave oven shell 10 simultaneously, fixed mount 4 also can be arranged on other positions of iron core 1, for example, and the top of iron core 1;

In addition, the number of fixed mount 4 is not limited to one, in order better transformer to be fixedlyed connected with microwave oven shell, reduce the flux leakage of transformer, avoid of excitation and the caused shell vibration of the electromagnetic force of transformer to microwave oven shell, can also be provided with a plurality of fixed mounts 4 by iron core 1, these a plurality of fixed mounts 4 can be arranged on the same end of iron core 1, can also be arranged on the difference end of iron core 1.

In the present invention, described fixed mount 4 is preferably the fixed mount of irony, thereby be equivalent to increase the area of iron core 1, can prevent that the magnetic flux that primary coil 2 and secondary coil 3 generate from leaking, it is saturated that iron core 1 is not easy to form magnetic flux, significantly reduced the flux leakage of transformer, avoided of direct-drive effect and the caused shell vibration of the electromagnetic force of transformer effectively to microwave oven shell, reduced the electromagnetic force influence of transformer of the present invention to other electronic units in the microwave oven electric control chamber, and the noise that has reduced the formed radiation of transformer simultaneously and brought;

In addition, by increase described fixed mount 4 is set, can increase the area of dissipation of transformer core 1 effectively, realize effectively primary coil 2 and secondary coil 3 these two heats that coil working generated being dissipated, thereby micro-wave oven transformer of the present invention has improved cooling effectiveness greatly, guarantee that transformer below safe temperature, has prolonged the service life of transformer.

In sum, compared with prior art, the present invention proposes a kind of micro-wave oven with novel transformer structure, it is fixedlyed connected with microwave oven shell transformer by the irony fixed mount, significantly reduced the flux leakage of transformer, avoided of excitation and the caused shell vibration of the electromagnetic force of transformer effectively to microwave oven shell, also increased the area of dissipation of transformer simultaneously, guarantee that transformer is operated in below the safe temperature, prolonged the service life of transformer, guaranteed use of microwave ovens safety, thereby strengthened micro-wave oven user's product use experience greatly, expanded the market application foreground of micro-wave oven, be of great practical significance.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. the micro-wave oven with novel transformer structure is characterized in that, includes microwave oven shell (10), and described microwave oven shell (10) inside is formed with Denso chamber (20), is provided with high-tension transformer (30) in the electric control chamber of described micro-wave oven (20);

Described high-tension transformer (30) includes iron core (1), is fixedly connected with at least one fixed mount (4) on the described iron core (1), and described fixed mount (4) is connected with microwave oven shell (10) simultaneously.

2. micro-wave oven as claimed in claim 1 is characterized in that, is fixedly connected with a described fixed mount (4) on the right side wall of described iron core (1).

3. micro-wave oven as claimed in claim 1 or 2 is characterized in that, between described iron core (1) and the fixed mount (4) for being threaded or welding, between described fixed mount (4) and the microwave oven shell (10) for being threaded.

4. micro-wave oven as claimed in claim 1 is characterized in that, described fixed mount (4) is the fixed mount of irony.

5. micro-wave oven as claimed in claim 1 is characterized in that, primary coil (2) and secondary coil (3) are installed in the described iron core (1), and described primary coil (2) is positioned at secondary coil (3) below.