JPWO2019087418A1 - Cooker - Google Patents

Abstract

In the cooking device (1) of the present invention, the waveguide (14) provided in the upper part of the heating chamber (10) in which the object to be heated (12) is set faces the bottom surface of the heating chamber (10). A protrusion (18) protruding toward the inside of the heating chamber (10) is provided at a position facing the opening (14a) formed at the position. As a result, it is possible to evenly heat the object to be heated in the heating chamber with a simple configuration.

Description

The present invention relates to a cooking device having a high frequency heating function.

In a heating cooker equipped with a general high-frequency heating function, a so-called microwave oven, a turntable or a rotating antenna is used to agitate the high frequency generated from the magnetron circuit in the refrigerator to heat the object to be heated in the refrigerator. I try to do it evenly.

However, if a turntable or a rotating antenna is provided in the refrigerator, there arises a problem that the device becomes larger by that amount.

Therefore, Patent Documents 1 and 2 disclose a technique for heating an object to be heated in a refrigerator without providing a turntable or a rotating antenna.

Japanese Patent Publication "Japanese Unexamined Patent Publication No. 2014-116175 (published on June 26, 2014)" Japanese Patent Publication "Japanese Patent Laid-Open No. 2000-346369 (published on December 15, 2000)"

By the way, in the technique disclosed in Patent Document 1, a plurality of openings are provided in the waveguide for guiding high frequency waves into the refrigerator, and the object to be heated in the refrigerator is heated. However, depending on the position where the opening is provided in the waveguide, there is a possibility that the object to be heated in the refrigerator cannot be heated evenly.

Therefore, in order to evenly heat the object to be heated in the refrigerator, it is necessary to provide an opening at an appropriate position, which causes a problem that the shape of the waveguide becomes complicated and the design itself becomes difficult.

Further, in the technique disclosed in Patent Document 2, an electric field distribution adjusting portion is provided near the central portion of the upper wall of the heating chamber, and the heating pattern is controlled to increase the electric field strength in the central portion where food is placed in the heating chamber. In particular, we are trying to improve the heating efficiency of small foods. However, the effect that can be realized by providing the electric field distribution adjusting unit is to increase the electric field strength in the central part of the heating chamber, not to stir the high frequency in the heating chamber, so that the object to be heated in the heating chamber is heated. There is a problem that it cannot be performed evenly.

One aspect of the present invention is to realize a cooking cooker capable of evenly heating an object to be heated in a heating chamber with a simple configuration without providing a turntable or a rotating antenna.

In order to solve the above problems, the cooking cooker according to one aspect of the present invention is a cooking cooker having at least a high frequency heating function, and is provided in the upper part of the heating chamber in which the object to be heated is set, and is provided in the heating chamber. An opening is formed in the waveguide at a position facing the bottom surface of the heating chamber, and the waveguide protrudes toward the heating chamber at a position facing the opening. It is characterized in that a protruding portion is provided.

According to one aspect of the present invention, it is possible to evenly heat the object to be heated in the heating chamber with a simple configuration without providing a turntable or a rotating antenna.

It is a schematic front sectional view of the state which removed the front panel of the cooking apparatus which concerns on Embodiment 1 of this invention. It is a schematic cross-sectional view of the state in which the side panel of the cooking apparatus shown in FIG. 1 is removed. It is a figure which shows the top surface side of the heating chamber of the cooking apparatus shown in FIG. It is a schematic diagram which shows an example of the arrangement position of the protrusion part and a phase adjusting member formed in the waveguide shown in FIG. It is a top view which shows the state which the heating cooker which concerns on another Embodiment of this invention is seen from the heating chamber side of the waveguide. It is a top view seen from the upper side of the protrusion provided in the cooking apparatus which concerns on still another Embodiment of this invention.

[Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail. In this embodiment, a cooking device having a heater heating function and a high frequency heating function will be described.

(Overview of cooker)
FIG. 1 is a schematic front sectional view of the cooking cooker 1 with the front panel (not shown) removed. FIG. 2 is a schematic cross-sectional view of the cooking cooker 1 with the side panel (not shown) removed.

As shown in FIG. 1, the cooking cooker 1 heats the object to be heated (for example, food) 12 on the tray 11 in the heating chamber 10 by executing either the high frequency heating function or the heater heating function. It has become.

In order to execute the high frequency heating function, as shown in FIG. 1, the heating cooker 1 is provided with a magnetron 13 that generates a high frequency and an upper portion of the heating chamber 10, and guides the high frequency generated by the magnetron 13 to the heating chamber 10. A waveguide 14 for this purpose is provided. The high frequency emitted from the opening 14a of the waveguide 14 is directly applied to the object to be heated 12 on the tray 11 in the heating chamber 10, reflected on the inner wall surface 10a of the heating chamber 10, and then reflected on the tray 11. Some of the above objects 12 to be heated are irradiated. The arrow in FIG. 1 shows an example of high frequency guided to the heating chamber 10 by the waveguide 14. The details of the waveguide 14 will be described later.

In order to execute the heater heating function, as shown in FIG. 2, the cooking cooker 1 is provided with two upper heaters 15a at the upper part of the heating chamber 10 and two lower heaters 15b at the lower part. There is. The outer side of the upper heater 15a is covered with a cover 16. The cover 16 is made of a material capable of reflecting heat, and has a structure capable of reflecting the heat generated by the upper heater 15a and radiating it toward the tray 11 in the heating chamber 10. The outer side of the lower heater 15b is covered with a cover 17. Like the cover 16, the cover 17 is also made of a material that can reflect heat, and has a structure that can reflect the heat generated by the lower heater 15b and radiate it toward the tray 11 in the heating chamber 10.

The tray 11 is made of ceramics, and the mounting surface of the object to be heated 12 has an uneven shape. The tray 11 does not have to be made of ceramics as long as it is made of a material that transmits high frequencies. Further, the mounting surface of the object 12 to be heated on the tray 11 does not have to have an uneven shape.

(Details of Waveguide 14)
FIG. 3 is a diagram showing the top surface side of the heating chamber 10.

In the waveguide 14, as shown in FIG. 1, an opening 14a is formed at a position facing the bottom surface of the heating chamber 10, and as shown in FIG. 3, the opening 14a faces the forming surface of the opening 14a. A protrusion 18 projecting toward the inside of the heating chamber 10 is provided at the position.

The protrusion 18 reflects the high frequency transmitted through the waveguide 14 and discharges it from the opening 14a into the heating chamber 10. Therefore, the protrusion 18 is made of a material that reflects high frequencies, for example, a metal such as stainless steel, and has a substantially conical shape with the heating chamber 10 side as the apex. The protrusion 18 may have a shape close to a cone, and may have a shape that can appropriately emit the high frequency transmitted through the waveguide 14 into the heating chamber 10. The shape of the tip of the protrusion 18 may be a needle-shaped point, or may be a truncated cone shape formed slightly flat. As described above, it is preferable that the tip of the protrusion 18 is flat so that the high frequency reflected by the protrusion 18 does not concentrate on one point in the heating chamber 10.

Therefore, the protrusion 18 may have a conical shape, a truncated cone shape, a truncated cone shape, or a truncated pyramid shape having the heating chamber 10 side as the apex.

The waveguide 14 is further provided with a phase adjusting member 19 for adjusting the phase of the high frequency transmitted through the waveguide 14 on the upstream side (upstream side in the high frequency transmission direction) of the protrusion 18. ing. Like the protrusion 18, the phase adjusting member 19 is made of a metal such as stainless steel and has a columnar shape protruding in the waveguide 14.

By providing the phase adjusting member 19, the phase of the high frequency generated by the magnetron 13 is adjusted, reflected by the protrusion 18, and radiated from the opening 14a of the waveguide 14 to the heating chamber 10. As a result, the high frequency transmitted from the waveguide 14 can be efficiently radiated into the heating chamber 10, so that the object to be heated 12 can be heated more effectively.

The phase adjusting member 19 is not limited to a columnar shape, but may have a conical shape, may have a shape protruding from the inner surface of the waveguide 14, and may have a high frequency reflected by the protrusion 18. It suffices if it is provided at a position that matches the phase of.

The protrusion 18 is preferably provided at a position in the waveguide 14 facing the center of the bottom surface of the heating chamber 10. As a result, high frequency diffusion into the heating chamber 10 can be performed more efficiently, so that the object to be heated 12 set in the heating chamber 10 can be heated more evenly.

The protrusion 18 may be made of a material other than metal such as stainless steel, for example, ceramics. When the protrusion 18 is made of ceramics, the protrusion 18 can absorb the high frequency returned from the heating chamber 10 when the high frequency is radiated in the state where the object 12 to be heated is not set in the heating chamber 10. Since it is possible, it is possible to avoid damage to the magnetron 13 due to the high frequency of the return.

(Specific example of waveguide 14)
FIG. 4 is a schematic view for explaining a preferable example in which the protrusion 18 and the phase adjusting member 19 are provided on the waveguide 14.

As shown in FIGS. 4A and 4B, the waveguide 14 is 88 mm in the longitudinal direction from one end of the heating chamber 10 when the width of the heating chamber 10 is 265 mm. An opening 14a is formed at a position 103 mm in the longitudinal direction from the other end of the. The opening 14a is a rectangular opening of 74 mm in the longitudinal direction and 60 mm in the lateral direction.

The end of the waveguide 14 on the opposite side of the magnetron 13 is located 83 mm from the end of the heating chamber 10 on the opposite side of the magnetron 13, and further 5 mm from the end of the opening 14a in the longitudinal direction. The part is located.

The protrusion 18 is a cone having a bottom surface diameter of 36 mm, a height of 14.5 mm, and a top surface diameter of 8 mm, centered on a position 127 mm from the end of the heating chamber 10 opposite to the magnetron 13.

The phase adjusting member 19 is a cylinder having a bottom surface diameter of 10 mm and a height of 8.5 mm, centered on a position 187 mm from the end of the heating chamber 10 opposite to the magnetron 13.

Since the height of the waveguide 14 is 25 mm, it is higher than the height of the protrusion 18 and the height of the phase adjusting member 19.

Further, as shown in FIG. 4B, the protrusion 18 is formed at the center of the waveguide 14 in the width direction, deviating from the center of the opening 14a. As a result, the high frequency generated by the magnetron 13 and transmitted through the waveguide 14 can be efficiently reflected by the protrusion 18.

In the present embodiment, an example in which the waveguide 14 has one opening 14a and one protrusion 18 has been described, but the opening 14a and the protrusion 18 may each have a plurality of openings. In the second embodiment below, an example having a plurality of openings and protrusions will be described.

[Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated.

FIG. 5 is a plan view showing a state of the waveguide 114 of the cooking cooker 2 according to the present embodiment as viewed from the heating chamber side.

The waveguide 114 is internally divided into two transmission lines 114b, and each transmission line 114b is provided with an opening 114a, a protrusion 118, and a phase adjusting member 119. That is, unlike the waveguide 14 of the first embodiment, the waveguide 114 according to the present embodiment is provided with two openings 114a and two protrusions 118. Here, the formation positions of the two openings 114a are different from each other.

Similar to the protrusion 18 of the first embodiment, the protrusion 118 is provided at a position corresponding to the opening 114a, and the phase adjusting member 119 is provided between the protrusion 118 and the magnetron 113. The function of the protrusion 118 is the same as that of the protrusion 18, and the function of the phase adjusting member 119 is the same as the function of the phase adjusting member 19.

As described above, by providing the waveguide 114 with two openings 114a and two protrusions 118, the high frequency irradiation range can be expanded. As a result, it is possible to effectively irradiate the object to be heated set in the heating chamber (not shown) in a space wider than the heating chamber 10 of the cooking apparatus 1 of the first embodiment with high frequency.

Further, since the two openings 114a are formed at different positions from each other, it is possible to make the high frequency radiation range from the openings 114a of each transmission line 114b different.

Further, if the generation of high frequency by the magnetron 113 is controlled for each of the two transmission lines 114b of the waveguide 114, it is heated that is set in the heating chamber using only the protrusion 118 of one transmission line 114b. It becomes possible to heat an object. That is, it becomes possible to partially heat the object to be heated set in the heating chamber.

By increasing the number of openings 114a in this way, it is possible to finely control the radiation range of high frequencies.

In the first and second embodiments, the protrusions 18 and 118 have a conical shape and a flat top, but are not limited thereto. In the following third embodiment, an example of the shape of the protrusion different from the first and second embodiments will be described.

[Embodiment 3]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated.

The cooking cooker according to the third embodiment is the same as the first and second embodiments, and the difference is the shape of the protrusion.

FIG. 6 is a plan view of the protrusions 218 and 318 provided in the cooking device according to the present embodiment as viewed from above.

The protrusion 218 has an octagonal pyramid shape as shown in FIG. 6 (a), and the protrusion 318 has a dodecagonal pyramid shape as shown in FIG. 6 (b).

As described above, the protrusions can appropriately reflect high frequencies not only in a conical shape but also in a polygonal pyramid shape such as an octagonal pyramid or a dodecagonal pyramid.

The shape of the protrusion is not limited to a conical shape such as the protrusion 18 or 118, or a polygonal pyramid shape of the protrusion 218 or the protrusion 318, and heats the high frequency transmitted through the waveguide 14. Any shape may be used as long as it can be appropriately radiated into the chamber 10.

[Summary]
The cooking device according to the first aspect of the present invention is a cooking device 1 having at least a high frequency heating function, and is provided in the upper part of the heating chamber 10 in which the object to be heated 12 is set, and a high frequency is generated in the heating chamber 10. The waveguide 14 is provided with a guiding tube 14, and an opening 14a is formed in the waveguide 14 at a position facing the bottom surface of the heating chamber 10, and the inside of the heating chamber 10 is provided at a position facing the opening 14a. It is characterized in that a protrusion 18 projecting toward is provided.

According to the above configuration, the waveguide has an opening formed at a position facing the bottom surface of the heating chamber and a protrusion protruding toward the heating chamber at a position facing the opening. By being provided, the high frequency transmitted through the waveguide is reflected by the protrusion and then discharged from the opening into the heating chamber. As a result, the high frequency emitted by hitting the protrusion is more widely diffused in the heating chamber than the high frequency emitted directly from the opening of the waveguide, so that the object to be heated set in the heating chamber is diffused. It is possible to irradiate high frequencies evenly.

Therefore, it can be set in the heating chamber without having to provide a stirrer for the drive system such as a turntable or a rotating antenna, and without having to make a complicated waveguide shape, with a simple configuration in which a protrusion is provided in the waveguide. It is possible to heat the heated object evenly.

In the cooking apparatus according to the second aspect of the present invention, in the first aspect, the protrusion 18 has a truncated cone shape, a truncated cone shape, a truncated cone shape, or a truncated pyramid shape with the heating chamber 10 side as the apex. You may.

According to the above configuration, since the protrusion has a substantially conical shape with the heating chamber side as the apex, the high frequency transmitted through the waveguide is radiated from the apex of the protrusion into the heating chamber. As a result, the high frequency can be concentrated on a part of the heating chamber side and the high frequency can be applied. Therefore, if the object to be heated is set at the position where the high frequency is concentrated, the object to be heated can be heated more evenly and efficiently. can do.

In the heating cooker according to the third aspect of the present invention, in the first or second aspect, the phase adjustment for adjusting the phase of the high frequency transmitted to the waveguide 14 on the upstream side of the protrusion 18. The member 19 may be further provided.

According to the above configuration, the waveguide is further provided with a phase adjusting member for adjusting the phase of the transmitted high frequency on the upstream side of the protrusion, so that the waveguide is stable with respect to the protrusion. And can transmit high frequencies. As a result, high frequencies can be stably radiated from the protrusions into the heating chamber, so that the object to be heated set in the heating chamber can be heated more evenly.

In the cooking apparatus according to the fourth aspect of the present invention, in the first aspect, the protrusion 18 may be provided at a position in the waveguide 14 facing the center of the bottom surface of the heating chamber 10.

According to the above configuration, since the protrusion is provided at a position in the waveguide facing the center of the bottom surface of the heating chamber, diffusion into the heating chamber can be performed more efficiently. This makes it possible to heat the object to be heated set in the heating chamber more evenly.

In the cooking apparatus according to the fifth aspect of the present invention, in any one of the first to third aspects, the waveguide 114 is formed with a plurality of openings 114a corresponding to the respective openings 114a. The protrusion 118 may be provided at the position.

According to the above configuration, the waveguide is formed with a plurality of openings, and protrusions are provided at positions corresponding to the respective openings, so that the high frequency transmitted through the waveguide can be generated by each protrusion. After being reflected by the section, it is discharged into the heating chamber through each opening. As a result, the high frequency is widely diffused in the heating chamber, so that the object to be heated set in the heating chamber can be irradiated with the high frequency more evenly.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1 Heating cooker 2 Heating cooker 10 Heating chamber 10a Inner wall surface 11 Tray 12 Object to be heated 13 Magnetron 14 Waveguide 14a Opening 15a Upper heater 15b Lower heater 16 Cover 17 Cover 18 Protrusion 19 Phase adjustment member 113 Magnetron 114 Waveguide 114a Opening 114b Transmission path 118 Projection 119 Phase adjusting member 218 Projection 318 Projection

Claims (5)

A cooking device that has at least a high-frequency heating function,
It is provided in the upper part of the heating chamber where the object to be heated is set, and a waveguide that guides high frequencies is provided in the heating chamber.
The waveguide is provided with an opening at a position facing the bottom surface of the heating chamber and a protrusion protruding toward the heating chamber at a position facing the opening. A featured cooker. The cooker according to claim 1, wherein the protrusion has a truncated cone shape, a truncated cone shape, a truncated cone shape, or a truncated pyramid shape having the heating chamber side as the apex. The heating according to claim 1 or 2, wherein the waveguide is further provided with a phase adjusting member for adjusting the phase of the transmitted high frequency on the upstream side of the protrusion. Cooking device. The cooking cooker according to claim 1, wherein the protrusion is provided at a position in the waveguide facing the center of the bottom surface of the heating chamber. The invention according to any one of claims 1 to 3, wherein the waveguide is formed with a plurality of openings, and the protrusions are provided at positions corresponding to the respective openings. Cooker.

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