JP4502083B2 - Heating device with steam generation function - Google Patents

Description

  The present invention relates to a heater and a heating device with a steam generating function for cooking an object to be heated using steam.

  2. Description of the Related Art Conventionally, there is known a heating apparatus with a steam generation function that generates steam by means of steam generation means of a heating cooking apparatus, supplies the steam into a heating chamber, and heats an object to be heated using infrared rays generated by the infrared generation means. (For example, refer to Patent Document 1).

  In this heating apparatus, the steam supplied into the heating chamber is cooked in a heated state by an infrared ray generating means, and the heat transfer area is reduced by using infrared rays having a wavelength in a predetermined range. Aiming for miniaturization and low pressure loss.

Japanese Patent No. 2897645

  However, in the heating device with a steam generation function described in Patent Document 1 described above, the surface of the object to be heated is wetted by water vapor because the object to be heated is heated using water vapor heated by infrared rays. There was a problem that it was difficult to crisp the surface of the object to be heated.

  The present invention has been made to solve the conventional problems, and the surface of the object to be heated can be crisply baked by the heater, and the surface of the object to be heated can be prevented from being too scorched by water vapor. It aims at providing the heating apparatus with a steam generation function.

  The heating device with a steam generating function of the present invention includes a heating chamber, steam generating means for generating steam in the heating chamber, and infrared generating means for generating infrared light having a peak characteristic with a wavelength that easily transmits the steam. It has a configuration.

  With this configuration, since infrared rays that pass through the vapor heat the object to be heated in the heating chamber, radiation from the surface of the heated object to be heated lowers the vapor density in the region in contact with the object to be heated, thereby heating the object to be heated. The surface of the object can be baked crisply. However, since the steam circulates and is supplied one after another, the steam density in the region in contact with the object to be heated does not become zero, and the surface of the object to be heated can be prevented from being excessively burnt. Moreover, since moderate humidity is given to the surface, the surface of the object to be heated is covered with steam, and moisture inside the object to be heated is difficult to escape. As a result, the surface is crisp and the contents can be cooked juicy.

  In addition, the heating device with a steam generating function of the present invention includes a locking portion provided on the standing walls facing each other in the heating chamber, and the heating chamber that is supported by the locking portion and vertically divides the heating chamber. And a communication hole that communicates the heating chamber in the vertical direction is provided in a peripheral portion of the square plate.

With this configuration, steam is supplied to the lower part of the heating chamber partitioned by the square dish, and the steam is guided upward from the communication hole provided in the peripheral part of the square dish, and is heated on the square dish. Cook while adding appropriate steam to the food.

  Furthermore, the heating device with a steam generating function according to the present invention includes a high-frequency generating unit that generates a high frequency, a locking portion provided on a standing wall facing each other in the heating chamber, and the heating chamber supported by the locking portion. And a square dish on which an object to be heated can be placed, and a radio wave absorption heating element is provided on the bottom surface of the square dish.

  With this configuration, the radio wave absorption heating element provided on the bottom surface of the square plate absorbs the high frequency generated by the high frequency generator and generates heat, so that the object to be heated placed on the square plate is placed on the lower side. Will be heated from. Thereby, a to-be-heated material can be heated from upper and lower surfaces.

  Furthermore, the heating apparatus with a steam generating function of the present invention has a configuration in which irregularities are formed on the ceiling surface of the heating chamber so that the steam circulates from above to below in the heating chamber.

  With this configuration, the water vapor supplied to the lower part of the heating chamber rises in the heating chamber, reaches the ceiling surface, and circulates by the unevenness provided on the ceiling surface, so that the object to be heated can be heated uniformly. .

  Further, the number of infrared generation means is at least three or more, and the peak wavelength of the infrared generation means located at the center side is shorter than the peak wavelength of the infrared generation means located around.

  When the wavelength is shortened, the amount of energy transmitted to the inside of the heated object is increased and the inside is easily heated, so that the amount of energy at the surface of the heated object decreases. The influence of heat radiation in the heating chamber is large, so the surroundings tend to be darker in the center and the surroundings when viewed in plan view. It is possible to efficiently heat the inside of the object to be heated while making the distribution of the above uniform.

  In the present invention, since infrared rays that pass through the vapor heat the object to be heated in the heating chamber, radiation from the surface of the heated object to be heated reduces the vapor density in the region in contact with the object to be heated, thereby heating the object to be heated. The surface of the object can be baked crisply. However, since the steam circulates and is supplied one after another, the steam density in the region in contact with the object to be heated does not become zero, and the surface of the object to be heated can be prevented from being excessively burnt. Moreover, since moderate humidity is given to the surface, the surface of the object to be heated is covered with steam, and moisture inside the object to be heated is difficult to escape. As a result, the surface is crisp and the contents can be cooked juicy.

Sectional drawing which cut | disconnected the heating apparatus with a steam generation function concerning 1st Embodiment of this invention right and left Sectional view of the top plate of the heating chamber cut Graph showing the ratio of absorbed energy of water vapor to the wavelength of light Cross-sectional view of heating device with steam generation function cut back and forth Side view of lamp heater (argon heater) The perspective view which shows the edge part of a lamp heater (A) is a front view showing a support member, (B) is a plan view of the support member Sectional drawing which shows the state which divided the heating chamber up and down with the square plate Perspective view of a square plate Sectional drawing which shows 2nd Embodiment of the heating apparatus with a steam generation function concerning this invention. Sectional drawing which shows 3rd Embodiment of the heating apparatus with a steam generation function concerning this invention.

  Hereinafter, a heating device with a steam generation function of an embodiment of the invention is explained using a drawing.

  1 is a cross-sectional view of a heating device with a steam generating function cut right and left, FIG. 2 is a cross-sectional view of a top plate cut off, and FIG. 3 is a graph showing the ratio of absorbing water vapor to the wavelength of light. FIG. 5 is a side view of a lamp heater as an infrared ray generating means, FIG. 6 is a perspective view showing an end portion of the lamp heater, and FIG. 7A is a support member. FIG. 8 is a plan view of the support member, FIG. 8 is a cross-sectional view showing a state in which the heating chamber is partitioned vertically by a square plate, and FIG. 9 is a perspective view of the square plate.

  As shown in FIG. 1 and FIG. 2, a heating apparatus 10 with a steam generating function according to an embodiment of the present invention includes a heating chamber 11, a steam generating means 50 that generates steam in the heating chamber 11, and a vapor that passes through the heating chamber 11. Infrared light generating means 20 for generating easy infrared light is provided.

  This heating device 10 is a microwave oven using a method of rotating two antennas, and includes a high frequency generation means 40 that supplies high frequency from the lower side of the bottom surface 11a of the heating chamber 11 in which the food item 12 to be heated is placed. This is an example in which a magnetron 41 which is a high-frequency generating means 40 is provided on the right side. 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. 4, a communication passage 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 and heated by the heater 16, and the air heated from the discharge hole provided in the partition plate 11 c can be sent into the heating chamber 11. As shown in FIG. 8, the air in the heating chamber 11 can be agitated even when the heating chamber is vertically divided by a square dish.

  As shown in FIG. 4, the heating chamber 11 is provided with a plurality of (three in this case) lamp heaters 21 for generating infrared rays as the infrared ray generating means 20, and each lamp heater 21 and magnetron are provided. 41 is controlled by the control means 13, and the lamp heater 21 radiates infrared light having a peak value at a wavelength that is difficult to be absorbed by water vapor, transmits water vapor existing in the heating chamber 11, and strikes the food 12 to perform cooking. It is configured. The lamp heater 21 is composed of an inner heater 21a disposed in the center and an outer heater 21b having a peak value at a wavelength longer than that of the inner heater 21a.

  As shown in FIG. 3, the peak wavelength of infrared rays generated by the lamp heater 21 that generates a plurality of wavelengths is 1.5 μm or more and less than 1.7 μm, or 2.0 μm or more 2 which is the wavelength in the region where the water vapor absorption rate is low. The control means 13 controls each lamp heater 21 so as to generate any two wavelengths of less than .3 μm or more than 3.4 μm and less than 4.5 μm.

  As a result, from the three lamp 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 one wavelength are radiated into the heating chamber 11, and the infrared rays pass through the infrared rays without being absorbed by the water vapor to radiately heat the food 12.

As a result, the food 12 placed in the heating chamber 11 can be directly and uniformly heated more quickly. Also,
When infrared rays are directly radiated on 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. In addition, 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.

  Further, the three lamp heaters 21 are heated in the heating chamber because the peak wavelength of the infrared generation means emitted from the inner heater 21a arranged in the center is shorter than the peak wavelength of the infrared generation means emitted from the outer heater 21b. The dark color of the object can be made almost uniform. That is, when the wavelength is shortened, the amount of energy transmitted to the inside of the heated object increases and the inside is easily heated, so that the amount of energy on the surface of the heated object decreases. The influence of the heat radiation of the heating chamber is large, so the surroundings tend to be darker in the center and the surroundings when viewed in plan. This makes it possible to efficiently heat the inside of the object to be heated while making the distribution of the above uniform.

  Furthermore, this heating device with a steam generating function is provided with stirring means for stirring the air above the heating chamber partitioned by a square plate or supplying outside air, so that the space above the heating chamber is based on the temperature in the heating chamber. If the convection heating action is controlled by forcibly stirring or discharging the air and steam, the effect of radiant heating can be ensured to the maximum and more effective heating is possible. Become.

  On the ceiling surface 11 b of the heating chamber 11, a reflection plate (unevenness) 25 is provided above the lamp heater 21. The reflector 25 is provided in a mountain shape with the top of each lamp heater 21 as the apex and the lowest point between the lamp heaters 21. Accordingly, the water vapor rising in the heating chamber 11 is guided and circulated by the unevenness of the reflector 25, so that the food 12 can be heated uniformly. Further, water droplets condensed on the reflecting plate 25 are dropped into the heating chamber 11 along the inclination of the reflecting plate 25.

  A pair of guard bars 26, 26 are provided along the lamp heater 21 diagonally below the lamp heaters 21 to guard against direct contact with the lamp heaters 21. It is desirable that the guard bar 26 is inclined in the left-right direction (the direction orthogonal to the paper surface in FIG. 4) to guide water droplets condensed on the guard bar 26 to a predetermined position. For example, by raising one end of the left and right end portions of the guard bar 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 guard bar 26 and lowering both left-right ends. Alternatively, a protrusion projecting downward may be provided on the lower surface of the guard bar 26, and water droplets may be dropped along the protrusion.

  In addition, it is desirable to seal the attachment part to the heating chamber 11 of the reflecting plate 25 or the lamp heater 21 with an insulator such as a mica plate to prevent vapor leakage. Further, since the lamp heater 21 and the guard bar 26 are provided and it is difficult to clean the reflecting plate 25, it is desirable to apply a self-cleaning paint to the lower surface of the reflecting plate 25 that is the side surface of the heating chamber 11. At this time, the reflectance in the far-infrared region of 3 μm or more is lower than the near-infrared ray. For example, when alumina or zirconia is mixed with the paint, the near-infrared ray having low water vapor absorption is reflected so that the food can easily absorb the radiation energy. it can. In addition, a pigment that makes dirt and the like inconspicuous may be added.

As shown in FIGS. 5 and 6, the lamp heater 21 includes a cylindrical tube member 22 made of quartz glass and a coil-shaped heat generating member 23 housed in the tube member 22. The heat generating member 23 is supported by a support member 24 that contacts the inner surface of the tube member 22. As a result, the heat generating member 23 is prevented from coming into direct contact with the tube member 22.
Is prevented from being heated excessively, thereby preventing devitrification of the tube member 22 and preventing a decrease in heating efficiency. Note that the surface of the tube member 22 may be coated to prevent devitrification.

  The pipe member 22 is attached with insulators 22a with the cross-sections of both ends thereof being narrowed. The tube member 22 is provided with an exhaust valve 22b that discharges air when an inert gas (argon gas) is sealed therein, and is sealed after gas injection. Since the exhaust valve 22b has a relatively low strength, it causes damage and eventually protrudes. Therefore, the lamp heater 21 is mounted so that the exhaust valve 22b faces sideways or upward on the back side. Is desirable. Thereby, it becomes easy to ensure the strength of the lamp heater 21 against an impact, and it is possible to make the protruding exhaust valve difficult to see.

  The heat generating member 23 has a spiral portion 23a wound in a coil shape and a linear portion 23b provided between the spiral portions 23a. The above-described support member 24 is desirably provided on the straight portion 23b. Thereby, since the support member 24 does not inhibit the heat generation of the spiral portion 23a, it can be supported without lowering the heat generation efficiency. In addition, it is desirable that the heat generating member 23 is appropriately provided with a play portion 23c so as to absorb the expansion and contraction of the heat generating member 23 due to heat.

  As shown in FIG. 7, the support member 24 has an endless shape that continues along the direction intersecting the axis of the tube member 22. That is, the support member 24 includes a leg portion 24a that grips the heat generating member 23 and supports it in the radial direction, and a peripheral portion 24b that contacts the inner surface of the tube member 22. It has a shape. At this time, if the outer diameter of the peripheral portion 24b is formed to be slightly larger than the inner diameter of the tube member 22, and the peripheral portion 24b is released after being compressed and inserted into the tube member 22, the peripheral portion 24b. Is deformed in the direction of expanding the diameter, the support member 24 is firmly held by the tube member 22. The peripheral portion 24b is provided in a direction that intersects (here, intersects at right angles) the heat generating member 23 provided along the axis of the tube member 22. Thereby, the heat generating member 23 can be reliably supported. In addition, since the support member 24 is configured to be as close to an endless shape as possible by performing welding or the like, the occurrence of sparks can be suppressed.

  As shown in FIG. 8, a locking portion 17 (see FIG. 2) provided on the standing walls 11d and 11d facing each other in the heating chamber 11, and the heating chamber 11 is partitioned vertically by being supported by the locking portion 17. In addition, a square dish 30 on which the food 12 can be placed is provided.

  As shown in FIG. 9, resin handles 33 are provided on the left and right sides of the overall rectangular plate-shaped square dish 30, and can be taken in and out along the locking portion 17 of the heating chamber 11. In addition, a communication hole 31 that communicates the heating chamber 11 up and down is provided in the peripheral portion of the square dish 30. Thus, for example, steam is generated below the heating chamber 11 partitioned by the square plate 30, and the generated steam is guided upward from the communication hole 31 provided in the peripheral portion of the square plate 30, and is then placed on the square plate 30. The placed food 12 is cooked by heating. At this time, the water vapor rising from the communication hole 31 in the peripheral portion of the square plate 30 is guided by the unevenness of the reflector 25 provided on the ceiling surface 11b of the heating chamber 11, as indicated by an arrow A in FIG. Therefore, the food 12 can be heated uniformly.

  Further, it is desirable to provide a radio wave absorption heating element 32 such as ferrite rubber which absorbs the high frequency generated by the high frequency generating means 40 and generates heat on the bottom surface of the square plate 30. Thereby, the foodstuff 12 mounted on the square plate 30 will be heated from the lower side, and the foodstuff 12 can be cooked from both upper and lower sides. In addition, by making unpainted the lower surface of the square plate 30 which contact | connects the electromagnetic wave absorption heat generating body 32, heat conductivity can improve and cooking time can be shortened.

  Next, with reference to FIG. 10, 2nd Embodiment of the heating apparatus with a steam generation function concerning this invention is described. In addition, the same code | symbol is attached | subjected to the site | part which is common in 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  In the heating apparatus 10B with a steam generation function shown in FIG. 10, the reflector 25B provided on the ceiling surface 11b of the heating chamber 11 is high near the center in the front-rear direction of the heating chamber 11 and low at both front and rear ends. For this reason, the water droplets condensed on the reflecting plate 25 </ b> B are dropped on the front end portion and the rear end portion of the heating chamber 11, and are not applied to the food 12.

  Next, with reference to FIG. 11, 3rd Embodiment of the heating apparatus with a steam generation function concerning this invention is described. In addition, the same code | symbol is attached | subjected to the site | part which is common in 1st and 2nd embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  In the heating device 10C with a steam generating function shown in FIG. 11, the reflector 25C provided on the ceiling surface 11b of the heating chamber 11 is highest at the rear end portion of the heating chamber 11 and lower at the front end portion. For this reason, the water droplets condensed on the reflecting plate 25 </ b> C are dropped on the front end portion and the rear end portion of the heating chamber 11, and are not applied to the food 12. Moreover, since a water droplet is dripped at the front-end part of the heating chamber 11, it is easy to clean.

  In addition, the heating apparatus with a steam generation function of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

  For example, in each of the embodiments described above, the three lamp heaters 21 are provided as the infrared ray generating means 20, but the number of the lamp heaters 21 is not limited to this. Also, it is possible to combine a single lamp heater 21 with a miraclon heater or a carbon heater.

  The steam generating means 50 includes a type that vaporizes water in the heating chamber 11 to generate steam, and a type that vaporizes outside the heating chamber 11 and supplies the vapor into the heating chamber 11. It ’s good.

  As described above, the heating device with a steam generating function according to the present invention heats the heated object in the heating chamber by the infrared rays that pass through the steam, so that the heated object is radiated from the surface of the heated heated object. The vapor density in the region in contact with the surface decreases, and the surface of the object to be heated can be crisply burnt. However, since the steam circulates and is supplied one after another, the steam density in the region in contact with the object to be heated does not become zero, and the surface of the object to be heated can be prevented from being excessively burnt. Moreover, since moderate humidity is given to the surface, the surface of the object to be heated is covered with steam, and moisture inside the object to be heated is difficult to escape. Thus, the surface is crisply baked and the contents can be cooked succulently, and it is useful as a heating device with a steam generating function for cooking an object to be heated using a heater and steam.

DESCRIPTION OF SYMBOLS 10 Heating device with steam generation function 11 Heating chamber 11b Ceiling surface 11d Standing wall 12 Food (object to be heated)
17 Locking part 20 Infrared ray generating means 25 Reflector (unevenness)
30 Square Plate 31 Communication Hole 32 Radio Wave Absorption Heating Element 40 High Frequency Generation Unit 50 Steam Generation Means

Claims (4)

A heating chamber for storing an object to be heated;
Steam generating means for supplying steam into the heating chamber;
Provided in the upper part of the heating chamber, all generate infrared rays having a peak wavelength of 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. In the heating apparatus with a steam generating function including at least three infrared generation means, among the at least three infrared generation means, the infrared generation means located on the center side has a shorter peak wavelength than the infrared generation means located around. Heating device with steam generation function that generates infrared rays. Locking portions provided on the standing walls facing each other in the heating chamber;
A square plate that is supported by the locking portion and divides the heating chamber up and down and on which an object to be heated can be placed;
The heating apparatus with a steam generating function according to claim 1, wherein a communication hole for vertically communicating the heating chamber is provided in a peripheral portion of the square dish. A high-frequency generator that generates high frequencies;
Locking portions provided on the standing walls facing each other in the heating chamber;
A square plate that is supported by the locking portion and divides the heating chamber up and down and on which an object to be heated can be placed;
The heating apparatus with a steam generating function according to claim 1, wherein a radio wave absorption heating element is provided on a bottom surface of the square dish.   A reflector provided on the ceiling surface of the heating chamber above the infrared ray generating means, having a mountain shape with the upper side of the infrared ray generating means as an apex and the lowest point between the infrared ray generating means; The heating apparatus with a steam generation function according to any one of claims 1 to 3.