KR20050036441A - A structure of ventilation duct in electric room for microwave oven - Google Patents

Abstract

The present invention relates to a microwave oven, and more particularly, to a structure of a full-length room exhaust duct that sucks air inside an electric room and blows it directly to a magnetron and discharges it to the outside of the microwave. The electric field exhaust duct structure of the microwave oven according to the present invention includes an air intake port 115 through which air blown by a blower fan is sucked, and an air flow path 110d for guiding the sucked air to the magnetron side. Body portion 110 and; A rear cover 130 fixed to the rear surface of the main body unit 110 to prevent the air sucked through the air intake port 115 from flowing back into the electric compartment; One side of the rear cover 130 is fixed to the main body 110, the other side is fixed to the main body 110 by a screw (S). In this case, the rear cover 130 may be easily fixed and, of course, securely fixed.

Description

A structure of ventilation duct in electric room for Microwave oven}

The present invention relates to a microwave oven, and more particularly, to a structure of a full-length room exhaust duct that sucks air inside an electric room and blows it directly to a magnetron and discharges it to the outside of the microwave.

2. Description of the Related Art In general, a microwave oven is a device for cooking food by generating microwave waves in a magnetron by supplying electric current, and irradiating the microwaves with heated objects such as food.

Such a microwave oven is classified into a household microwave oven having a small magnetron and a commercial microwave oven having a large or a plurality of magnetrons.

In addition, the microwave oven is classified according to the heating method of food, the home microwave oven is generally a glass tray method of rotating the food, commercial microwave oven is mainly used a stirrer pan method to scatter the microwave wave is scanned.

On the other hand, commercial microwave ovens are commonly used in convenience stores, which are frequently used, or in restaurants that require food to be cooked in a short time, and therefore, a relatively high output is required.

Hereinafter, the configuration of a commercial microwave oven as described above (hereinafter referred to as a microwave oven) will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing the configuration of a typical commercial microwave oven, Figure 2 is a perspective view showing an exhaust duct according to the prior art.

First, referring to FIG. 1, a configuration of a general microwave oven is as follows.

The microwave oven is composed of an outer case forming an exterior, a cavity 20, and an electrical equipment room 30. And the door 40 is installed on the front of the cavity 20 is included.

The outer case forms the appearance of the microwave oven and at the same time serves to protect the cavity 20 installed therein. Therefore, the outer case is generally made of an iron plate having a predetermined strength.

The outer case is installed around the cavity 20. The upper plate (Upper Plate 11) that covers the upper and both sides of the cavity 20 at the same time, and the base plate (Base Plate 13), the ca It consists of a front plate (Front Plate 15) to form the front of the beat 30 (30), and a back plate (Back Plate 17) to protect the back of the cavity (30).

The cavity 20 is a space in which food, such as food, is cooked, and is composed of a substantially rectangular box opened forward. That is, food is fed through the opened front, and cooked food is taken out.

Above the cavity 20, that is, on the outer top surface, a waveguide 21 for guiding the microwave wave generated by the magnetron to be described below into the cavity 20 is provided. One side of the waveguide 21 is provided with a synchronous motor M for driving a stirrer fan to be described below.

The waveguide 21 as described above is provided not only on the outer top surface of the cavity 20 but also on the outer bottom surface. Therefore, when the waveguides 21 are respectively provided on the upper and lower surfaces of the cavity 20, the microwave waves scanned into the cavity 20 are scanned upwards and downwards and downwards and upwards.

The electrical equipment room 30 is a space formed on the inner right side of the outer case, and a plurality of electrical equipment for driving the cavity 20 is installed.

In the electric chamber 30, a plurality of electric components such as a transformer 31, a magnetron 33, a blower fan 35, a capacitor 37 and a noise filter 39 are installed. have.

Meanwhile, the above-mentioned plurality of electric components, in particular, the transformer 31 and the magnetron 33 serve to generate microwave waves that are scanned into the cavity 20. In this process, the electric components are subjected to high temperature heat. It will cause fever. Therefore, the temperature of the electrical equipment room 30 increases while cooking food.

In order to cool the electric chamber 30 heated as described above, the outside air must be sucked, which is performed by the blower fan 35. Although not shown, the blower fan 35 substantially sucks air by rotating the blower fan installed therein by the fan motor. In this way, when the blowing fan rotates, air is sucked into the interior space of the electric compartment 30. In this process, the air sucked passes around the transformer 31, and thus the transformer 31 is naturally cooled. .

On the other hand, the electrical equipment chamber 30, more specifically, the one side of the blower fan 35, the electrical equipment room exhaust duct 50 is provided. The electric field exhaust duct 50 serves to guide the air sucked by the blower fan 35 to the outside of the electric compartment via the magnetron 33. In addition, although not shown, the back plate 17 is provided with an exhaust port through which the air guided by the electric field exhaust duct 50 is discharged to the outside of the microwave oven.

On the other hand, the structure of the electric field exhaust duct 50 will be described in more detail with reference to the bar shown in FIG.

The electric field exhaust duct 50 is composed of a main body portion 51 and a rear cover 53.

First, the main body 51 serves to blow air sucked from the blower fan 35 into the magnetron, and an air inlet 51a communicating with the blower fan 35 is formed at the left side of the main body 51. In addition, an air guide 51b is formed on an inner wall surface of the main body portion 51, and more specifically, on the right side of the suction port 51a to separate the sucked air into the upper side and the lower side. In addition, the main body 51 is formed with an upper exhaust duct 51c and a lower exhaust duct 51d for supplying air sucked into the upper and lower sides thereof.

In addition, the rear cover 53 is configured to be in close contact with the upper left surface of the main body portion 51, and more specifically, covers the upper surfaces of the air intake port 51a and the air guide 51b.

On the other hand, the back cover 53 is fixed to the upper surface of the main body portion 51 by an adhesive or double-sided tape. That is, after applying an adhesive or double-sided tape to the upper edge of the main body portion 51 and then attach the rear cover 53, the rear cover 53 is fixed to the upper surface of the main body portion (51).

However, the above conventional technologies have the following problems.

As described above, the air in the heated state of the electrical equipment chamber is introduced into the electrical equipment exhaust duct 50 while the rear cover 53 is fixed to the upper surface of the main body portion 51 by an adhesive or a double-sided tape. The hot air is in contact with the electric field exhaust duct 50 to transfer heat to the electric field exhaust duct 50, so that the adhesive or double-sided tape fixing the back cover 53 is melted by heat.

In this case, the fixed state of the rear cover 53 fixed by the adhesive or the double-sided tape is loosened, and there is a problem in that the rear cover 53 is separated from the main body part 51 at the air supply.

In addition, if the rear cover 53 is not tightly fixed to the main body 51 as described above, the air blown from the blower fan 35 is not supplied to the upper exhaust duct 51c and the lower exhaust duct 51d and the overall length There is also a problem of backflowing into the room.

Therefore, an object of the present invention is to solve the problems in the prior art as described above, and to provide a structure in which the rear cover is firmly fixed.

Another object of the present invention is to facilitate fixing of the rear cover.

The electric field exhaust duct structure of the present invention microwave oven for achieving the above object, the air inlet for the air blown by the blower fan is sucked, and the air flow path for guiding the sucked air to the magnetron side is formed therein A main body portion; A rear cover fixed to the front surface of the main body to prevent the air sucked through the air inlet from flowing back into the electric compartment; The back cover is fixed to the main body by means of a cover tightening means.

And the carb fastening means is formed at one end of the rear cover, the engaging projection to be fixed to one side of the rear cover to the main body portion; It is formed on one side of the main body portion, and the locking groove is inserted into the locking projection; A through-hole formed at the other end of the rear cover, such that the other side of the rear cover is fixed to the main body by a screw; It is formed on the other side of the main body portion, characterized in that it comprises a fastening hole to which the screw is fastened.

It is preferable that the locking projection is composed of a plurality.

Preferably, the through hole of the rear cover and the fastening hole of the main body part are composed of a plurality.

According to the present invention as described above, the rear cover can be firmly fixed to the main body portion, it is prevented that the air flowing into the electrical equipment room exhaust duct backflow into the electrical equipment room.

Hereinafter, the electric field exhaust duct structure of the microwave oven according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view showing a full-length exhaust duct structure of the microwave oven according to the present invention, Figure 4 is a partial perspective view showing the main portion of FIG.

First, the microwave oven consists of an outer case, a battlefield where a plurality of electrical components are installed, and a cavity into which food to be cooked is put. And the inside of the battle room room is equipped with a full length room exhaust duct.

As shown in FIG. 3, the electric field exhaust duct 100 includes a main body 110 and a rear cover 130.

The main body 110 constitutes a substantial electric field exhaust duct 100 and is composed of an outer guide 110a, an inner guide 110b and a bottom surface 110c. That is, the guides 110a and 110b are connected by the bottom portion 110c. However, based on the bottom portion 110c, the guides 110a and 110b protrude forward from the bottom portion 110c.

The guides 110a and 110b and the bottom portion 110c are preferably integrally formed, and a predetermined air flow path 110d is formed inside the guides 110a and 110b and the bottom portion 110c. The air flow path 110d serves to guide the air flowing from the blower fan (not shown) to the upper side and the lower side by the air separation guide to be described below.

Meanwhile, the guides 110a and 110b are bent to the right, respectively, and the upper exhaust duct 111 and the lower exhaust duct 113 are formed side by side.

The upper exhaust duct 111 guides the air flowing from the blower fan (not shown) upward by the air separation guide to be described below. And although not shown, the upper magnetron is installed on the outlet side of the upper exhaust duct 111. Therefore, the air blown through the upper exhaust duct 111 is discharged directly toward the upper magnetron.

The lower exhaust duct 113 guides the air introduced from the blower fan (not shown) downward by the air separation guide to be described below. And although not shown, the lower magnetron is installed at the outlet side of the lower exhaust duct 113, the air blown through the lower exhaust duct 113 is discharged directly toward the lower magnet.

On the other hand, the air inlet 115 through which air is sucked by communicating with a blower fan (not shown) is formed at approximately the left middle of the outer guide 110a. The left side of the inner guide 110b is formed with a substantially triangular air separation guide 117 is formed. Therefore, the air sucked through the air inlet 115 is separated up and down by the air separation guide 117, and is supplied to the upper exhaust duct 111 and the lower exhaust duct 113, respectively.

The inner guide 110b has a locking groove 200 into which the locking protrusion of the rear cover to be described below is inserted. The locking groove 200 is provided on the upper side and the lower side of the inner guide 110b, respectively.

In addition, a fastening hole 210 corresponding to the through hole of the rear cover, which will be described below, is formed at the left end of the outer guide 110a.

Looking at the main body 110 having the configuration as described above is as follows.

The main body 110 may be formed by providing the guides 110a and 110b, the bottom portion 110c, and the air separation guide 117, which are the aforementioned components, as separate members, and then assembling or adhering to each other. . However, the body portion 110 is more preferably made of the above components.

That is, to produce a mold (Mold) for the shape of the main body 110. Then, after injecting the synthetic resin raw material into the produced mold, and after a predetermined solidification (固 形 化) process, the body portion 110 of the structure as described above is completed. Of course, the locking groove 200 and the fastening hole 210 may be easily formed by modifying a part of the mold for manufacturing the main body 110. However, the locking groove 200 may be made by cutting a part of the main body portion 110, more specifically, the inner guide 110b in a completed state, and the fastening hole 210 may also be punched or drilled. It is natural that it can be drilled. That is, the main body 110 is formed in addition to being formed at the same time by the mold, it can be manufactured by a variety of methods according to the design convenience or manufacturing process.

On the other hand, the rear cover 130 is installed on the upper surface of the main body 110, which is configured as described above, in more detail the upper surface of the air inlet 115 and the air separation guide 117.

An extension part 131 extending to the right side is formed at the right front end of the back cover 130, and the extension part 131 is formed at two positions respectively above and below.

And, as shown in Figure 4, the front end portion of the extension portion 131 is formed with a bent portion 133 is bent downward, the lower end of the bent portion 133 is a locking projection 300 protruding to the right again ) Is formed. Such a locking projection 300 is inserted into the locking groove 200 of the body portion 110 described above.

In addition, a through hole 310 corresponding to the fastening hole 210 of the main body part 110 is formed at the left edge of the rear cover 130.

Such a rear cover 130 is preferably the same as the main body portion 110 is made. That is, after the synthetic support material is injected into the mold having the shape of the back cover 130 and then subjected to a solidification step, the back cover 130 having the above structure is completed. Of course, the back cover 130 may be made by a variety of methods in addition to the method by the mold. For example, the locking projection 300 is not made integral with the rear cover 130, it may be made by fixing a separate member.

Hereinafter, the main body 110 and the rear cover 130 as described above will be described as consisting of the full-length exhaust duct 100 by assembling each other.

First, the main body 110 is fixed so as not to flow on the flat bottom. At this time, it is obvious that the locking groove 200 and the fastening hole 210 of the main body 110 should be exposed to the upper surface or the outside. Thereafter, when the locking protrusion 300 of the rear cover 130 is inserted into the locking groove 200 of the main body 110, the locking protrusion 300 is caught by the lower surface of the inner guide 110b. In this case, the right side of the rear cover 130 does not flow. That is, it is locked. The lower right side of the back cover 130 is in close contact with the upper surface of the inner guide 110b.

As described above, when the left side of the rear cover 130 is lowered rearward while the right side of the rear cover 130 is locked, the lower left side of the rear cover 130 is in close contact with the upper surface of the outer guide 110a. At the same time, the through hole 310 communicates with the fastening hole 210 of the main body 110. Thereafter, when the screw S is fastened to the through hole 310 and the fastening hole 210, the rear cover 130 is firmly fixed to the upper surface of the main body part 110. Of course, when the rear cover 130 is fixed to the main body 130, the air inlet 115 and the air separation guide 117 of the main body 110 are blocked from the outside.

Meanwhile, although not shown, an exhaust guide is installed at the rear of the electric field exhaust duct 100. The exhaust guide guides the air passing through the upper magnetron and the lower magnetron to be discharged to the outside of the microwave oven.

As described above, the present invention, in the full length chamber exhaust duct consisting of the main body and the rear cover, it can be seen that one side of the rear cover is fixed and the other side is fixed by the fastening member as a basic idea. Therefore, it is apparent that more modifications are possible to those skilled in the art within the scope of the basic idea of the present invention.

According to the electric field exhaust duct structure of the microwave oven as described above, the following effects are expected.

The right side of the rear cover is locked to the main body by a locking projection, and the left side is fixed to the main body by a screw. In this case, the rear cover is not separated from the main body portion unless the screw is loosened by a separate external force, for example, a drive. Therefore, there is an advantage that the fixing of the rear cover is firm.

In addition, in order to fix the conventional back cover to the body portion, in addition to applying an adhesive, the back cover must be adjusted in place. However, in the present invention, since the position of the rear cover is adjusted by inserting the engaging protrusion of the rear cover in the main body portion, there is an advantage that the rear cover is fixed at the correct position and the fixing work of the rear cover is easy.

On the other hand, if the back cover is firmly fixed to the body portion, the back cover is not separated from the body portion, as well as air does not leak between the back cover and the body portion. In this case, since the air blown by a blower fan is blown in large quantities to the upper and lower magnetrons, the advantage that the magnetron is cooled is also expected.

In addition, it becomes possible to discharge the heated air inside the electric compartment to the outside of the microwave oven.

1 is a perspective view showing the configuration of a typical commercial microwave oven.

Figure 2 is a perspective view showing the back of the electric field exhaust duct of the microwave oven according to the prior art.

Figure 3 is a perspective view showing the rear of the electric equipment exhaust duct of the microwave oven according to the present invention.

4 is a partial perspective view showing the main portion of FIG.

Explanation of symbols on the main parts of the drawings

100: full length duct 110: main body

110a: outer guide 110b: inner guide

110c: bottom portion 110d: air flow path

111: upper exhaust duct 113: lower exhaust duct

115: air inlet 117: air separation guide

130: rear cover 200: locking groove

210: fastener 300: locking projection

310: through hole

Claims (4)

An air inlet through which the air blown by the blower fan is sucked in, and a main body having an air passage therein for guiding the sucked air to the magnetron side; A rear cover fixed to the front surface of the main body to prevent the air sucked through the air inlet from flowing back into the electric compartment; The rear cover is a full-length exhaust duct structure of a microwave oven, characterized in that fixed to the body portion by the cover fastening means. The method of claim 1, wherein the capa fastening means, A latching protrusion formed at one end of the rear cover, such that one side of the rear cover is fixed to the main body by being fixed to the main body; It is formed on one side of the main body portion, and the locking groove is inserted into the locking projection; A through-hole formed at the other end of the rear cover, such that the other side of the rear cover is fixed to the main body by a screw; It is formed on the other side of the main body portion, electric field exhaust duct structure of the microwave oven, characterized in that it comprises a fastening hole for screwing. 3. The electric field exhaust duct structure of claim 1 or 2, wherein the locking projections are configured in plural numbers. 3. The electric field exhaust duct structure according to claim 1 or 2, wherein a plurality of through holes of the rear cover and a plurality of fastening holes of the main body part are formed.