JP2007278529A - High-frequency heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device capable of evenly heating various objects to be heated while properly humidifying the same by improving a steam injection method in a heating chamber. <P>SOLUTION: A steam generating means 15 is disposed at a left depth bottom of the heating chamber 10, an injection port 23 having the injecting direction obliquely downward, is formed on a left side wall surface, and the steam generated by the steam generating means 15 is injected to an approximately central portion of a loading plate 12 as an object to be heated loading surface from the injection port 23. Thus the object loaded on an arbitrary position on the object loading surface can be surely wrapped by the steam, a temperature of a space around the object can be quickly raised, and the object can be uniformly heated while being properly humidified. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a high-frequency heating apparatus that can heat an object to be heated using steam.

Conventionally, this type of heating device has a discharge nozzle that injects saturated water vapor into the heating chamber, and the discharge nozzle is formed of a flexible tube, and the food that is the object to be heated is a saturated water vapor that can be expanded and contracted. (For example, refer to Patent Document 1).
JP 2004-251478 A

  However, in the conventional configuration, there is a problem that uneven heating occurs in simultaneous heating of a plurality of objects to be heated and heating of an object to be heated having a large mounting area.

  The present invention solves the above-described conventional problems, improves the method of jetting steam in the heating chamber, and performs heating that suppresses unevenness while adjusting appropriate temperature and wet conditions for various objects to be heated. An object of the present invention is to provide a device that performs the above.

  In order to solve the above-described conventional problems, a heating apparatus according to the present invention includes a heating chamber that houses an object to be heated, a plurality of steam generation units that supply steam to the heating chamber, and a microwave that irradiates the heating chamber with microwaves. And a plurality of steam generation units each including a dedicated heating unit and generating steam using at least one of the steam generation units.

  Thereby, the steam generated by being heated by the dedicated heating unit reliably and quickly wets the surrounding space of the object to be heated, and can be uniformly heated while appropriately moistening the object to be heated.

  The heating apparatus according to the present invention can provide an apparatus that can heat an object to be heated in various shapes with high uniformity by injecting steam so as to apply forced convection of steam into the heating chamber.

  1st invention has the heating chamber which accommodates a to-be-heated material, the several steam generation part which supplies a vapor | steam to a heating chamber, and the microwave generation means which irradiates a microwave in a heating chamber, A plurality of steam Each of the generating units has a dedicated heating unit and generates steam using at least one of a plurality of steam generating units, thereby the shape, quantity, size, etc. of the object to be heated. Depending on the form, the object to be heated can be reliably wrapped with steam, and the space around the object to be heated can be quickly heated and uniformly heated while being moderately wetted.

  In the second invention, the plurality of steam generating parts are a saturated steam generating part for generating saturated steam and a superheated steam generating part for generating superheated steam. Depending on the cooking method, the object to be heated can be reliably wrapped with steam at the optimum temperature, and the object to be heated can be heated uniformly while being appropriately moistened.

According to a third aspect of the present invention, the saturated steam generator is provided on the bottom surface side of the heating chamber, and the superheated steam generator is provided on the top surface side of the heating chamber or the upper side of the heating chamber side surface. From the bottom surface side, it is possible to heat the superheated steam from the upper side of the object to be heated while humidifying and heating the entire heating chamber with saturated steam, so that optimum heating can be realized.

  A fourth invention includes a detachable water storage tank, a water supply pump capable of supplying water from the water storage tank to a plurality of steam generation units, and a switching means for switching a water supply flow path to the plurality of steam generation units. In addition, the humidification state around the heated object can be automatically switched according to the heating condition of the heated object, and it is possible to realize the same usability as in the case where there is only one steam generation unit.

  5th invention is equipped with the latching means which latches a to-be-heated material mounting tray in the heating chamber side surface, and the space of a heating chamber is made up and down by latching a to-be-heated material mounting tray in a locking means. At the time of division, at least one or more steam generators supply steam to the upper and lower spaces, and two objects to be heated can be separately put into the upper and lower spaces at the same time for cooking.

  According to a sixth aspect of the present invention, the locking means is formed by drawing the wall surface material of the heating chamber, and the locking means includes a horizontal portion on which the object to be heated is placed and locked, and an inclined portion below the horizontal portion. By providing the spray port of the steam generation part in the inclined part, the steam injection direction is inclined downward, and when the heated object is placed on the bottom of the heating chamber, Steam is spouted out. Further, it is possible to make it difficult to see the ejection port on the side wall of the lower surface of the throttle portion.

  7th invention equips the back side of a to-be-heated material mounting dish with the heat generating body which generate | occur | produces heat | fever by absorbing a microwave, and provided the surface heater in the top | upper surface of the heating chamber, and supplies a microwave into a heating chamber. As a result, the microwave heating element having the object to be heated placed on the object to be heated placing plate generates heat. Thus, cooking can be performed using heat transfer, radiant heat of the heater, condensation heat of steam, and the like. In particular, even when steam adheres to the article to be heated, it can be re-vaporized by heating the microwave heating element.

  According to an eighth aspect of the present invention, when the inside of the heating chamber is divided into upper and lower parts by locking the article to be heated by the locking means, all the steam generating parts supply steam to the lower space. In this case, a means for locking the object to be heated is provided, and when the object is partitioned by the object to be heated, the volume of the heating chamber decreases. As a result, the steam density can be increased, and by supplying the steam from two places, the temperature of the object to be heated can be quickly raised and heated uniformly while being appropriately moistened.

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

(Embodiment 1)
FIG. 1 is a partially cutaway front cross-sectional configuration diagram of a high-frequency heating device according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing an appearance of a heated object placing tray according to the present embodiment. .

  In FIG. 1, the heating chamber 10 is closed by radio waves with each wall surface formed of a metal material, and a heated object storage space 11 for storing the heated object is formed in the heating chamber 10. The bottom surface of the object-to-be-heated storage space 11 is configured by a placing plate 12 made of a non-conductive material. A radiating antenna 14 that radiates microwaves is disposed below the mounting plate 12 at a substantially central portion of the bottom wall surface 13 that forms the heating chamber 10. The radiating antenna 14 is disposed on the terminal end side of a waveguide 15 that transmits microwaves, and a magnetron 16 that is a microwave generating means for generating microwaves is provided on the other end side of the waveguide.

A first steam generating means 17 that generates saturated steam is disposed at the left bottom of the heating chamber 10. This steam generating means 17 includes a water reservoir recess 17a, a water heating means 17b for heating the water reservoir recess 17a from below, and a steam lid (not shown) made of a non-conductive and heat-resistant material having an opening covering the water reservoir recess 17a. Not).

  A second steam generating means 18 that generates saturated steam or superheated steam is disposed above the left wall surface of the heating chamber 10. This steam generating means 18 is a die-cast heater whose main material is aluminum, a water reservoir recess 18a, a water heating means 18b for heating the water reservoir recess 18a, a heating section 18c for heating saturated steam generated in the water reservoir recess, and heat exchange. 18 d and the injection port 18e which supplies the produced | generated superheated steam (saturated steam depending on the energization state of a heating part) in the heating chamber 10 are provided.

  The water supply means 19 includes a detachable water storage tank 19a provided on the lower side of the heating chamber 10, a water supply pump 19b for supplying water from the water storage tank 19a to either the water reservoir recess 17a or the water reservoir recess 18a, and a switching unit 19c. Is provided.

  Moreover, in order to attach the to-be-heated material mounting tray 22 to the right-and-left wall surfaces 20 and 21 of the heating chamber 10, the locking means 23, 24, and 25 made by carrying out mold drawing (deformation) of the right-and-left wall surface are attached. A plurality of heights are provided so that the height can be selected. Furthermore, the latching means 23 (same for 24 and 25) is composed of a horizontal part 23a for placing the article to be heated 22 and an inclined part 23b for supporting the horizontal surface (same for 24a, 24b, 25a and 25b). .

  The second steam generation means 18 is attached to the inclined portion 23b, and the injection port 18e is directed toward the lower center side of the heating chamber 10. A plurality of (for example, three) injection ports 18e having the same injection direction can be arranged at predetermined intervals in the front-rear direction of the heating chamber 10 so that steam can be injected into the entire heating chamber 10.

  The radiating antenna 14 is rotationally driven by a motor 26.

  In addition, thermistor 27, which is a temperature detection means for detecting the temperature in the space to be heated, is used as a detection means related to heating information sensing for effectively controlling heating, and the amount of infrared rays emitted from the surface of the object to be heated is detected. Then, infrared detection sensor means 28 for determining the surface temperature, means for detecting the humidity in the heating chamber, and the like can be attached.

  A heating heater 30 is provided on the top surface side 29 of the heating chamber 10 and generates radiant heat from the top surface side 29.

  Further, the control means 31 is based on an operation input signal from an operation unit (not shown) or a signal from each detection means, and a magnetron 16 or a motor 26 which is a microwave generation means, a steam generation means 17, a steam generation means. 18, the operation of the water supply means 19 and the heating means 30 is controlled. Heating conditions, control conditions, and the like are temporarily or permanently stored in storage means (integrated with the control means). The operation unit includes a display unit, an automatic heating operation key, a manual heating setting key, a heating start key, and the like.

  In FIG. 2, a heated object placing tray 22 includes a metal plate body 22a having a surface mainly composed of aluminum or iron and a water repellent treatment, and a micro plate mainly composed of ferrite provided on the bottom surface thereof. The main body 22a of the dish 22a is secured so that a predetermined gap between the heating element 22b which is a wave absorber and the wall surface material and the main body 22a can be secured and attached to the horizontal portions 23a, 24a, 25a of the locking means 23, 24, 25. A guide 22c formed of a heat-resistant resin provided on the longitudinal side of the plate and a plurality of substantially rectangular slit holes 22d provided around the dish body 22a.

  Next, the operation | movement and effect | action are demonstrated about the heating apparatus which consists of the said structure.

  FIGS. 3 and 4 show one state when the heated object mounting tray 22 is installed in the heating chamber 10, FIG. 3 shows a state where it is installed in the upper stage, and FIG. 4 shows a state where it is installed in the middle stage. ing.

  As shown in FIG. 3, when the heated object mounting tray 22 is installed in the horizontal portion 23a, the heating chamber 10 is separated into a space between the heating chamber 10a and the heating chamber 10b. Thereby, when mounting a to-be-heated material on the mounting base 12 and cooking a to-be-heated material, the volume of a heating chamber becomes small. When the steam generation means 17 is operated in a state where the flow path is as indicated by the arrow 32 by the switching means 19c, the saturated steam fills the heating chamber 10b. When the amount of steam generated by the steam generating means 17 is the same, the steam density in the heating chamber 10 increases. The object to be heated can be optimally heated in a short time by saturated steam.

  Further, when the steam generating means 18 is operated in the state where the flow path is as indicated by the arrow 33 by the switching means 19c, the superheated steam can be concentrated and injected on a part of the heating chamber 10b.

  Further, when the magnetron 16 and the motor 26 are operated in each of the above states and the microwave is supplied into the heating chamber 10, the object to be heated is directly heated and also absorbed by the heating element 22. Is also heated. When saturated steam adheres to the heating element 22b or the mounting table 12 on the back side of the heated object placing tray 22 and the condensed water is condensed, the condensed and attached water is heated directly or by heat transfer. It becomes steam again and is used to heat the object to be heated.

  As shown in FIG. 4, when the heated object mounting tray 22 is installed in the horizontal portion 24a, the heating chamber 10 is separated into a heating chamber 10c and a heating chamber 10d. In addition, when the object to be heated is to be cooked by placing it on the object to be heated platen 22, the steam generation means 18 is operated with the switching means 19 c with the flow path as indicated by the arrow 33. Thus, steam is blown directly onto the object to be heated from the injection port 18e. At this time, the temperature of the sprayed steam can be varied by the energization operation of the heating unit 18c, and can be set to a temperature of 100 ° C. or higher, and can be superheated steam. Suitable for heating a small quantity of heated objects in a short time.

  Further, when the magnetron 16 and the motor 26 are operated in this state and microwaves are supplied into the heating chamber 10, the heating element 22b rises in temperature, and the object to be heated is heat-transferred and heated from below by the heat transfer. You can turn it on. At this time, most of the microwave is shielded by the metal heated object mounting tray 22 and absorbed by the heating element 22b, so that it is difficult to enter the heated object. Further, after this state, the heating means 30 is energized so that radiant heat is applied to the object to be heated from the top surface 29 side, and the upper side of the object to be heated can be burnt.

  Moreover, when this puts a to-be-heated material on the mounting base 12 and heats a to-be-heated material, the volume of a heating chamber becomes still smaller. When the steam generating means 17 is operated in the state where the flow path is as indicated by the arrow 32 by the switching means 19c, the saturated steam is quickly filled in the heating chamber 10b.

  Further, when the magnetron 16 and the motor 26 are operated in this state and the microwave is supplied into the heating chamber 10, the object to be heated is directly heated, and the object to be heated is also absorbed by the heating element and heated. Is done.

  Further, separate heated objects are placed on the heated object placing tray 22 and the placing table 12, and cooking is performed in different heating sequences. You can also finish at the same time.

  In the embodiments described so far, the case where there are two steam generation units has been described as a representative example, but three or more may be provided as necessary. Moreover, in that case, the number of locking means may be increased, and in some cases, a plurality of objects to be heated may be used.

  As described above, according to the present invention, various cooking methods can be realized according to the size and shape of the object to be heated by providing a plurality of steam generators and partitioning the space in the heating chamber. The present invention can be applied not only to a microwave oven, an oven, or a griller, but also to heating devices in industrial fields such as semiconductor devices and drying devices.

Partially cutaway front cross-sectional configuration diagram of the heating device according to the first embodiment of the present invention The perspective view of the to-be-heated material mounting tray of the apparatus Front cross-sectional configuration diagram when the heated object tray of the device is installed in the upper stage Front cross-sectional configuration diagram when the heated object tray of the device is installed in the middle

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Heating chamber 16 Magnetron 17 Steam generating means 18 Steam generating means 18e Injection port 19 Water supply means 22 Heated object mounting tray 23, 24, 25 Locking means 23a, 24a, 25a Horizontal part 23b, 24a, 25b Inclined part

Claims (8)

A heating chamber for storing an object to be heated; a plurality of steam generating portions for supplying steam to the heating chamber; and a microwave generating means for irradiating microwaves into the heating chamber, wherein the plurality of steam generating portions are A high-frequency heating apparatus that includes a dedicated heating unit and generates steam using at least one of the plurality of steam generating units. The high-frequency heating device according to claim 1, wherein the plurality of steam generation units include a saturated steam generation unit that generates saturated steam and a superheated steam generation unit that generates superheated steam. The high-frequency heating device according to claim 1 or 2, wherein the saturated steam generator is provided on the bottom surface side of the heating chamber, and the superheated steam generator is provided on the top surface side of the heating chamber or the upper side of the side surface of the heating chamber. 4. A detachable water storage tank, a water supply pump capable of supplying water from the water storage tank to a plurality of steam generation units, and switching means for switching a water supply flow path to the plurality of steam generation units. The high frequency heating apparatus according to any one of the above. When a heating means is placed on the side surface of the heating chamber, the holding means for locking the object to be heated is locked, and the space inside the heating chamber is divided vertically by locking the object to be heated by the locking means. The high-frequency heating device according to any one of claims 1 to 4, wherein at least one steam generating section supplies steam to the upper and lower spaces. A locking means is formed by drawing the wall surface material of the heating chamber, and the locking means is composed of a horizontal portion on which the object to be heated is placed and locked, and an inclined portion below the horizontal portion, and generates steam. The high frequency heating device according to any one of claims 3 to 5, wherein a jetting direction of the steam is obliquely downward by providing a jet port of a portion in the inclined portion. The high-frequency heating device according to claim 5 or 6, wherein a heating element that generates heat by absorbing microwaves is provided on the back side of the dish to be heated, and a surface heater is provided on the top surface of the heating chamber. When the inside of the heating chamber is divided into upper and lower parts by locking the heated object placing tray to the locking means, the heated object is placed at a position where all the steam generating parts supply steam to the lower space. The high frequency heating device according to any one of claims 1 to 4, further comprising a locking means for locking the table.