JP5228645B2 - Cooking equipment - Google Patents

Description

  The present invention relates to a cooking device that cooks an object to be heated by using a rod heater provided with a heater guard.

  Conventionally, a recess 3 is formed in the ceiling wall 2 in the heating chamber 1, a rod heater 4 is provided in the recess 3, and the food that is to be heated is heated using infrared rays generated by the rod heater 4. A cooking device for cooking is known (see, for example, Patent Document 1).

  As shown in FIG. 4 and FIG. 5, this type of heating cooking apparatus includes microwave supply means 5 that supplies microwaves to the heating chamber 1 while cooking with infrared rays, and is supplied from the microwave supply means 5. Cooking is also performed by microwaves. The rod heater 4 that generates infrared rays is provided with a heater guard 6 to prevent the rod heater 4 from being damaged.

The heater guard 6 is disposed substantially in parallel with the rod-shaped heater 4, and both ends of the heater guard 6 penetrate the ceiling wall 2 in the heating chamber 1, and the formed screw portion is tightened with a nut, whereby the heater guard 6 Is fixed to the ceiling wall 2 in the heating chamber 1. Further, the heater guard 6 is not limited to a substantially U-shaped shape, but may have a linear shape although it is inferior in strength. In this case, the heater guard 6 is installed between the side walls of the recess 3.
JP 2008-106962 A

  However, in the heating cooking apparatus described in Patent Document 1 described above, the heater guard 6 is made of stainless steel and is not the same material as the ceiling wall 2 in the heating chamber 1 that is a plated steel plate. When 2 is fixed with a screw and a nut, there is a problem that electrochemical corrosion (hereinafter referred to as electric corrosion) occurs when steam generated by using a cooking device or juice of a heated object adheres. . This problem is that even if the top wall 2 in the heating chamber 1 is rust-prevented, it has not been possible to prevent rust in practice for a long period of time.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a cooking device that does not cause electric corrosion when the heater guard is fixed to the ceiling wall of the heating chamber.

  The cooking device according to the present invention includes a heating chamber provided with a front opening, a recess formed in the ceiling wall of the heating chamber, a first bar heater disposed in the recess, and the first bar heater. And a heater guard attached to the ceiling wall of the heating chamber, and the heater guard uses the same material as the ceiling wall of the heating chamber.

As a result, it is possible to prevent the occurrence of galvanic corrosion and rust between the heater guard and the ceiling wall of the heating chamber.

  The present invention can prevent the rod-shaped heater from being damaged even when the object to be heated is taken in and out during cooking, and can prevent the occurrence of galvanic corrosion and rust between the heater guard and the heating chamber ceiling wall.

The first invention includes a heating chamber provided with a front opening, the heating and the indoor ceiling wall forming the recess, and the rod Heater that disposed in the recess, and arranged in the bar Heater the anda heater guard attached to the heating chamber ceiling wall, wherein the heater guard, the heat formed by bending a plate material of the indoor ceiling wall of the same material, by the end of the plate was bent U, upon cooking It is possible to prevent the first rod-shaped heater from being damaged even when the object to be heated is taken in and out, and to prevent rust from being generated due to electric corrosion between the heater guard and the ceiling wall of the heating chamber. Moreover, when a user puts an object to be heated into or out of the heating chamber, it is possible to prevent the end face of the heater guard from being injured.

In addition, the second invention further includes a first rod heater disposed in the recess and on the opening side of the heating chamber in the recess, and the recess on the rear side of the first rod heater. a second rod-shaped heater was disposed in the portion, by attaching the said heater guard to the heating chamber ceiling wall of the front and rear of the rear side and the second rod-shaped heater of the first rod-shaped heater, during cooking It is possible to prevent the first rod-like heater from being damaged even when the object to be heated is taken in and out, and to prevent the occurrence of electric corrosion and rust between the heater guard and the ceiling wall of the heating chamber.

The third invention is further to the second aspect, the first rod-shaped heater is Milacron heaters, by the second rod-shaped heater and the argon heater, if there is no steam in the heating chamber Mirach When there is steam in the Ron heater or the heating chamber, the object to be heated can be radiantly heated with an argon heater.

The fourth invention is further to the first or second aspect, the heater guard, by attaching the opposite end portions are formed in side view substantially U-shaped Te said heating chamber ceiling wall and caulking, reduce assembly steps can do.

The fifth invention, further to the first or second aspect, and the heater guard and the heating chamber ceiling wall, a molten aluminum-plated steel sheet having a black tarnish properties at 500 ° C. or less (blackening) the use, by high heat during cooking, the heating chamber ceiling wall turned black, cut with prevent rust occurs.

The sixth aspect of the first at least one of the fifth, has a microwave supply means for supplying microwaves into the heating chamber, the longitudinal length of the heater guard the microwave By making it an integral multiple of a quarter wavelength of the microwave supplied from the supply means, it is possible to prevent the electric field from concentrating on the rod heater and generating a spark.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a front sectional view of the cooking device according to the first embodiment of the present invention cut in the left-right direction, FIG. 2 is a sectional side view of the cooking device cut in the front-rear direction, and FIG. The principal part front view of the heater guard of a cooking apparatus, FIG.3 (b) is sectional drawing in the AA line of Fig.3 (a).

  As shown in the figure, the cooking device 10 according to the embodiment of the present invention includes a heating chamber 11, steam generating means 50 that generates steam in the heating chamber 11, and infrared generation that generates infrared rays that easily transmit steam. Means 20.

  In the present embodiment, the steam generation means 50 is provided in the heating chamber 11, but steam generated outside the heating chamber 11 may be supplied into the heating chamber 11.

  This cooking device 10 is a microwave oven using a method of rotating two antennas, and a high frequency generating means for supplying a high frequency from below the bottom wall 11a of the heating chamber 11 in which the food 12 to be heated is placed. This is an example in which a magnetron 41 that is a high-frequency generating means 40 is provided on the right side toward the heating chamber. A waveguide 42 that guides the high frequency generated from the magnetron 41 into the heating chamber 11 and a rotating antenna 43 that generates radio waves to the heating chamber 11 are provided.

  In addition, as shown in FIG. 2, a communication path 14, a circulation fan 15, and a heater 16 are provided behind the partition plate 11 c at the back of the heating chamber 11, and air in the heating chamber 11 is removed by the circulation fan 15. The air is sucked from the suction hole 14 a and heated by the heater 16, and the air heated from the discharge hole 14 b provided in the partition plate 11 c can be sent into the heating chamber 11.

  As shown in FIG. 2, the heating chamber 11 is provided with a plurality of (here, three) bar heaters 21 for generating infrared rays as the infrared ray generating means 20, and each of the bar heaters 21 and the magnetron. 41 is controlled by the control means 13, and the bar heater 21 radiates infrared light having a wavelength that is difficult to be absorbed by water vapor, transmits water vapor existing in the heating chamber 11, and hits the food 12 for cooking. .

  The wavelength of infrared rays generated by the bar heater 21 that generates a plurality of wavelengths is 1.5 μm or more and less than 1.7 μm, 2.0 μm or more and less than 2.3 μm, or 3.4 μm, which is a wavelength in a region where the water vapor absorption rate is low. The control means 13 controls each rod heater 21 so that any one wavelength less than 4.5 μm is generated as a peak.

  As a result, from the three rod heaters 21, the wavelength in the region where the water vapor absorption rate is low is 1.5 μm or more and less than 1.7 μm, 2.0 μm or more and less than 2.3 μm, or 3.4 μm or more and less than 4.5 μm. Infrared rays having a peak at one wavelength are radiated into the heating chamber 11, and the infrared rays are transmitted through the infrared ray without being absorbed by the water vapor to radiately heat the food 12 that is to be heated.

  As a result, the food 12 placed in the heating chamber 11 can be directly and more quickly heated. Further, when infrared rays are directly radiated to the surface of the food 12, the surface of the food 12 is crisp and the burnt eyes can be quickly applied. Furthermore, since the steam circulates and is supplied one after another, the steam density in the area in contact with the food 12 does not become zero, and the surface of the food 12 can be prevented from being excessively burnt. Moreover, since the surface is given appropriate humidity, the surface of the food 12 is wrapped with steam, moisture inside the food 12 becomes difficult to escape, the surface is crisp, and the contents are cooked juicy. Will be able to.

  As shown in FIG. 2, the bar heater 21 provided in the left-right direction on the ceiling wall 11b of the heating chamber 11 is provided with an argon heater 21a (first bar heater) in the center of the ceiling wall 11b. Miraclone heaters 21b are provided on both front and rear sides of 21a (second rod heater) to generate infrared rays having a desired wavelength as described above.

The argon heater 21a has a core wire of tungsten wire, and the transparent tube member 22 is filled with argon gas. The argon heater 21a has a feature that the start-up of the operation is quicker than that of the miraclon heater 21b.

  The miraclon heater 21b has been used conventionally, but has a longer wavelength than the argon heater 21a, rises more quickly than a mica heater or the like, and is suitable for imparting a burnt color to the surface of the food 12. In addition, the cost is low.

  Here, when the miraclon heater 21b is mounted in a microwave oven, the miraclon heater 21b absorbs microwaves and generates heat, which may melt the glass material being used. It is desirable to employ a white tube MIRACRON heater 21b that hardly absorbs waves.

  The argon heater 21a and the miraclon heater 21b are collectively referred to as a rod heater 21.

  Two recesses 25a and 25b are formed in the ceiling wall 11b of the heating chamber 11 in the front-rear direction, and an argon heater 21a and a miraclon heater 21b are accommodated in the recess 25a on the front opening side. A miraclon heater 21 b is accommodated in the back side recess 25 b of the heating chamber 11.

  The inner wall 25af of the recess 25a on the front opening side of the heating chamber 11 is formed to hang substantially vertically. Further, the inner wall 25bf of the recess 25b on the front opening side of the heating chamber 11 is also formed to hang substantially vertically.

  The miraclon heater 21b is provided adjacent to the front inner walls 25af and 25bf of the heating chamber 11. And the lower end part of the miraclon heater 21b is the ceiling wall 11b in the heating chamber 11 outside the recesses 25a and 25b so that the user can hardly see the miraclon heater 21b from the front opening side, and the heating chamber 11 front opening side The Miraclone heater 21b is disposed from the front opening side so as to be hidden from the user.

  The Miraclone heater 21b is blinded and cannot be confirmed even when looking up the ceiling wall 11b of the heating chamber 11 from obliquely below from the normal use position of the user on both the front opening side and the back side. When the user further brings his face closer to the heating chamber 11 side, the Miraclone heater 21b can be visually observed for the first time.

  The distance between the Miraclone heater 21b and the inner walls 25af and 25bf on the front side of the heating chamber 11 may be set such that, for example, an insulator for sake is inserted and does not come into contact with the Miraclone heater 21b.

  Further, the argon heater 21a and the miraclon heater 21b housed in the recess 25a are arranged with a communication space 25as therebetween. And both inner wall 25ar, 25br of the back surface of the heating chamber 11 of the recessed part 25a, 25b is inclined so that it may spread below toward the ceiling wall 11b.

As a result, a blindfold 11d is formed at the edge of the heating chamber 11 front opening side, which is the ceiling wall 11b in the heating chamber 11 outside the recesses 25a and 25b so as to make it difficult for the user to see the Miraclone heater 21b from the front opening side. The lower end of the Miraclone heater 21b is located outside the recesses 25a and 25b and above the edge on the front opening side of the heating chamber 11, so that the Miraclone heater 21b is hidden from the front opening side to the user. Therefore, when the heated object is taken in and out during cooking, the argon heater 21a and the Miraclone heater 21b are not easily damaged, and the dirt attached to the Miraclone heater 21b is easily noticeable. Can do.

  The heater guard 26 is made of a hot-dip galvanized steel sheet having the same material and blackening resistance as the ceiling wall 11b in the heating chamber 11. That is, the hot dip aluminized steel sheet having blackening resistance is bent and further bent into a U shape so that the end face cannot be seen.

  The heater guard 26 is fixed to the ceiling wall 11 b in the heating chamber 11 by crimping the leg portions 26 a formed at both ends of the heater guard 26 to the ceiling wall 11 b in the heating chamber 11.

  The substantially U-shaped heater guard 26 as viewed from the front is provided on the rear side of the Miraclone heater 21b and before and after the argon heater 21a. The lower end of the heater guard 26 is positioned above the ceiling surface 11b, and makes it difficult for the heated object to hit the heater guard 26 when the heated object is taken in and out during cooking.

  The longitudinal dimension of the heater guard 26 is n · (λ / 4) (where n = 1, 2, 3...), That is, the heater guard, where the microwave frequency generated from the magnetron 41 is λ. The longitudinal dimension of 26 is set to an integral multiple of the microwave frequency. For example, if the frequency of the microwave is 2450 MHz, it is set to an integral multiple of about 31 mm.

  By doing so, the heater guard 26 and the ceiling wall 11b in the heating chamber 11 are made of a hot-dip galvanized steel sheet having blackening resistance, which is the same material, thereby preventing the occurrence of an electrolytic corrosion phenomenon occurring between different metals. It is possible to prevent the heater guard 26 and the ceiling wall 11b in the heating chamber 11 from being rusted.

  Further, the heater guard 26 is fixed to the ceiling wall 11b in the heating chamber 11 by fixing the screws 26 by crimping the leg portions 26a formed at both ends of the heater guard 26 to the ceiling wall 11b in the heating chamber 11. Compared to the above, material costs and assembly man-hours can be reduced.

  In addition, the heater guard 26 is manufactured by bending a hot-dip aluminized steel sheet and bending it in a U shape so that the end face is not visible, thereby preventing the user of the cooking device from being injured at the end face of the heater guard 26. Even when rust is generated on one end surface, rust is visible and an unsanitary impression is not given to the user. Furthermore, compared with the case where it was formed with the conventional pipe, intensity | strength can be improved.

  In addition, by setting the longitudinal dimension of the heater guard 26 to an integral multiple of (λ / 4), the electric field in the heating chamber 11 is concentrated on the argon heater 21a, thereby preventing an abnormal situation in which sparks are generated. it can.

  Further, it is desirable that the heater guard 26 is inclined in the left-right direction (the direction orthogonal to the paper surface in FIG. 2) to guide the water droplets condensed on the heater guard 26 to a predetermined position. For example, by raising one end of the left and right end portions of the heater guard 26 and lowering the other end, water droplets can be guided to one end portion side. Or you may make it guide a water droplet to the right-and-left both ends by raising the center part between the branches of the heater guard 26 and lowering both left-right ends. Alternatively, a protrusion projecting downward may be provided on the lower surface of the heater guard 26, and water droplets may be dropped along the protrusion.

In addition, it is desirable to seal the inner walls of the recesses 25a and 25b and the attachment portion of the rod heater 21 to the heating chamber 11 with an insulator such as a mica plate to prevent the leakage of steam. Further, since there is the rod heater 21 and the heater guard 26 and it is difficult to clean the inner walls of the recesses 25a and 25b, at least self-cleaning paint is applied to the lower surface of the inner walls of the recesses 25a and 25b, which is the side surface of the heating chamber 11. Is desirable. Similarly, by applying the heater guard 26 in a dark color, for example, black, the dirt attached to the heater guard 26 is made inconspicuous, and the radiation energy is increased so that the object to be heated can be easily burnt.

  At this time, black is desirable. This is because the reflectance in the far-infrared region of 3 μm or more than the near-infrared can be lowered. For example, when ceramic such as alumina or zirconia is mixed with paint, it reflects a lot of near infrared rays with low water vapor absorption, makes it easy for food 12 to absorb radiant energy, and makes it easy to burn the object to be heated. It is. Moreover, you may add a black pigment so that stain | pollution | contamination etc. may become inconspicuous.

  In the present embodiment, two recesses 25a and 25b are provided. However, three or more recesses may be formed, and at least a miraclon heater 21b may be provided in each recess.

  In addition, the heat cooking apparatus of this invention is not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.

  For example, in each of the embodiments described above, the three tube heaters 21 are provided as the infrared ray generating means 20, but the number of tube heaters 21 is not limited to this.

  As described above, the cooking device according to the present invention is less likely to damage the infrared ray generating means even when taking in and out the object to be heated during cooking, and also prevents the occurrence of electrolytic corrosion occurring between different metals, The heater guard 26 and the ceiling wall 11b in the heating chamber 11 have an effect of preventing rusting, and are useful as a heating cooking apparatus such as a microwave oven, oven, grill, etc., for cooking an object to be heated using a rod heater. .

Front sectional drawing which cut | disconnected the heat cooking apparatus in the 1st Embodiment of this invention in the left-right direction Side sectional view of the cooking device cut in the front-rear direction (A) The principal part front view of the heater guard of the same heating cooking apparatus, (b) Sectional drawing in the AA line of (a) Side sectional view of a conventional cooking device cut in the left-right direction Side surface sectional drawing which cut | disconnected the cooking apparatus of FIG. 4 in the front-back direction

DESCRIPTION OF SYMBOLS 10 Cooking apparatus 11 Heating chamber 11b Ceiling wall 11d Standing wall 12 Food 17 Locking part 20 Infrared ray generating means 21 Bar heater 21a Argon heater (first bar heater)
21b Miraclone heater (second rod heater)
25a, 25b Recessed portion 25af, 25bf Front inner wall 25as Communication space 25ar, 25br Rear inner wall 26 Heater guard 30 Square plate 40 High frequency generating means 50 Steam generating means

Claims (6)

A heating chamber with a front opening;
A recess formed in the ceiling wall of the heating chamber;
A rod heater disposed in the recess;
A heater guard installed in parallel with the rod heater and attached to the ceiling wall of the heating chamber ,
The heater guard is formed by bending a plate material of the same material as the ceiling wall of the heating chamber, and an end portion of the plate material is U-bent,
Cooking equipment. A first rod-shaped heater in the heating chamber opening side of the concave portion in and the recess is disposed and a second rod-shaped heaters, the said concave portion of the rear side of the first rod-like heater,
It was attached to the heating chamber ceiling wall the heater guard around the rear side and the second rod-shaped heater of the first rod-like heater,
The cooking apparatus according to claim 1. It said first rod-like heater is Milacron heaters, the second rod-shaped heater is argon heater,
The heat cooking apparatus according to claim 2. The heating cooking apparatus according to claim 1 or 2, wherein the heater guard is formed in a substantially U-shape when viewed from the side and is attached by crimping both ends with the ceiling wall of the heating chamber. And the heater guard and the heating chamber ceiling wall, with the molten aluminum-plated steel sheet having a blackening at 500 ° C. or less,
The cooking apparatus according to claim 1 or 2. A microwave supplying means for supplying a microwave into the heating chamber,
Longitudinal length dimension of the heater guard is an integer multiple of a quarter wavelength of the microwave supplied from the microwave supplying means,
The heat cooking apparatus of any one of Claim 1 to 5 .

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