WO2019087418A1

WO2019087418A1 - Heating cooker

Info

Publication number: WO2019087418A1
Application number: PCT/JP2018/004643
Authority: WO
Inventors: 下田　英雄
Original assignee: シャープ株式会社
Priority date: 2017-10-31
Filing date: 2018-02-09
Publication date: 2019-05-09
Also published as: JPWO2019087418A1

Abstract

This heating cooker (1) comprises a waveguide (14) provided in the upper portion in a heating chamber (10) where the object to be heated (12) is set, and a protrusion (18) protruding towards the interior of the heating chamber (10) is provided in a position of said waveguide opposite of an opening (14a) which is formed in a position opposite of the bottom surface of the heating chamber (10). By this means, the even heating of an object to be heated in the heating chamber can be achieved with a simple configuration.

Description

Cooker

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

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

However, if a turntable and a rotating antenna are provided in the cabinet, there arises a problem that the size of the apparatus is increased accordingly.

Then, the technique which heats the to-be-heated material in a chamber | chamber is disclosed by

patent document

1, 2 without providing a turntable and a rotating antenna.

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

By the way, with the technique disclosed by patent document 1, the some opening is provided in the waveguide for introduce | transducing a high frequency into a chamber, and the to-be-heated material in a chamber is heated. However, depending on the position where the opening is provided in the waveguide, there is a possibility that heating of the object to be heated in the storage can not be performed uniformly.

Therefore, in order to uniformly heat the object to be heated in the storage, the opening needs to be provided at an appropriate position, so that the shape of the waveguide becomes complicated and the design itself becomes difficult.

Further, in the technique disclosed in Patent Document 2, the electric field distribution adjustment unit is provided near the upper wall central portion of the heating chamber, and the heating pattern is controlled to increase the electric field strength of the central portion where the food in the heating chamber is placed. In particular, we are aiming to improve the heating efficiency of small food products. 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 portion of the heating chamber, and it is not to stir the high frequency in the heating chamber. The problem of not being able to do it uniformly occurs.

An object of one aspect of the present invention is to realize a heating cooker capable of uniformly heating an object to be heated in a heating chamber with a simple configuration without providing a turntable and a rotating antenna.

In order to solve the above-mentioned subject, a cooking-by-heating machine concerning one mode of the present invention is a cooking-by-heating machine which has at least high frequency heating function, and it is provided in the heating chamber upper part which sets a thing to be heated. The waveguide has an opening formed at a position facing the bottom surface of the heating chamber, and 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 uniformly heat the object to be heated in the heating chamber with a simple configuration without providing a turntable and a rotating antenna.

It is a schematic front sectional view in the state where the front panel of the cooking-by-heating machine concerning embodiment 1 of the present invention was removed. It is a schematic cross-sectional view of the state which removed the side panel of the heating cooker shown in FIG. It is a figure which shows the top | upper surface side of the heating chamber of the heating cooker shown in FIG. It is a schematic diagram which shows an example of the arrangement | positioning position of the projection part and phase adjustment member which were formed in the waveguide shown in FIG. It is a top view which shows the state which looked at the heating cooker which concerns on other embodiment of this invention from the heating chamber side of a waveguide. It is the top view seen from the upper side of the processus | protrusion part equipped with the heating cooker which concerns on other embodiment of this invention.

Embodiment 1
Hereinafter, an embodiment of the present invention will be described in detail. In the present embodiment, a heating cooker having a heater heating function and a high frequency heating function will be described.

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

As shown in FIG. 1, the heating 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 perform the high frequency heating function, the heating cooker 1 is provided on the upper portion of the heating chamber 10 and the magnetron 13 generating the high frequency as shown in FIG. 1 and guides the high frequency generated by the magnetron 13 to the heating chamber 10 And a waveguide 14 for the purpose. The high frequency wave emitted from the opening 14 a of the waveguide 14 is directly irradiated to the object to be heated 12 on the tray 11 in the heating chamber 10, and is reflected to the inner wall surface 10 a of the heating chamber 10. There is one to be irradiated to the upper object 12 to be heated. Arrows in FIG. 1 indicate an example of a 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, the heating cooker 1 is provided with two upper heaters 15a in the upper part of the heating chamber 10 and two lower heaters 15b in the lower part, as shown in FIG. There is. The upper heater 15 a is covered with a cover 16 on the outside. 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 15 a and radiating it toward the tray 11 in the heating chamber 10. The lower heater 15 b is covered with a cover 17 on the outside. Like the cover 16, the cover 17 is also made of a material capable of reflecting heat, and has a structure capable of reflecting the heat generated by the lower heater 15 b and radiating it toward the tray 11 in the heating chamber 10.

The tray 11 is made of ceramic, and the mounting surface of the object to be heated 12 has a concavo-convex shape. The tray 11 may not be made of ceramic as long as it is a material that transmits high frequency. In addition, the mounting surface of the object to be heated 12 of the tray 11 may not have an uneven shape.

(Details of the waveguide 14)
FIG. 3 is a view 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 of the heating chamber 10, and as shown in FIG. 3, the opening 14a is opposed to the forming surface of the opening 14a. At a position, a projection 18 which protrudes into the heating chamber 10 is provided.

The protrusion 18 reflects the high frequency wave transmitted through the waveguide 14 and discharges it from the opening 14 a into the heating chamber 10. Accordingly, the projection 18 is made of a material that reflects high frequency, for example, a metal such as stainless steel, and has a substantially conical shape with the heating chamber 10 side at the top. In addition, the protrusion part 18 should just be a shape close | similar to a cone, and should just be a shape which can discharge | release the high frequency which transmitted the waveguide 14 in the heating chamber 10 appropriately. Further, the shape of the tip of the protrusion 18 may be a needle-like shape, but may be a truncated cone shape formed a little flat. As described above, since the tip of the projection 18 is flat, the high frequency reflected by the projection 18 is not concentrated at one point in the heating chamber 10, which is preferable.

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

The waveguide 14 is further provided with a phase adjustment member 19 for adjusting the phase of the high frequency transmitted through the waveguide 14 on the upstream side (the upstream side in the transmission direction of the high frequency) of the projection 18. ing. The phase adjusting member 19 is made of a metal such as stainless steel as in the case of the protrusion 18 and has a cylindrical shape projecting 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 emitted to the heating chamber 10 from the opening 14 a of the waveguide 14. Thus, the high frequency wave transmitted from the waveguide 14 can be efficiently radiated into the heating chamber 10, so the object 12 can be heated more effectively.

The phase adjusting member 19 is not limited to a cylindrical shape, and may be conical, as long as it has a shape protruding from the inner surface of the waveguide 14, and the high frequency reflected by the projection 18 It should just be provided in the position which matches with the phase of.

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

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

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

As shown in (a) and (b) of FIG. 4, when the width of the heating chamber 10 is 265 mm, the waveguide 14 is 88 mm in the longitudinal direction from one end of the heating chamber 10, the heating chamber 10. An opening 14a is formed at a position of 103 mm in the longitudinal direction from the other end of the lens. 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 opposite to the magnetron 13 is located 83 mm from the end of the heating chamber 10 opposite to the

magnetron

13 and 5 mm from the end of the opening 14 a in the longitudinal direction. Department is located.

The projection 18 is conical with a bottom diameter of 36 mm, a height of 14.5 mm, and a top 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 whose center of the bottom surface is 10 mm in diameter and 8.5 mm in height centered on a position of 187 mm from the end of the heating chamber 10 opposite to the magnetron 13.

Since the waveguide 14 has a height of 25 mm, it is higher than the height of the projection 18 and the height of the phase adjustment member 19.

Further, as shown in (b) of FIG. 4, the protrusion 18 is offset from the center of the opening 14 a and formed at the center of the waveguide 14 in the width direction. Thereby, the high frequency generated in the magnetron 13 and transmitted through the waveguide 14 can be efficiently reflected by the projection 18.

In the present embodiment, an example is described in which the opening 14a of the waveguide 14 is one and the protrusion 18 is one, but the openings 14a and the protrusions 18 may be plural. In the following second embodiment, a plurality of openings and protrusions will be described.

Second Embodiment
Other embodiments of the present invention are described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

FIG. 5: is a top view which shows the state seen from the heating chamber side of the waveguide 114 of the heating cooker 2 which concerns on this embodiment.

The waveguide 114 is internally divided into two transmission paths 114b, and an opening 114a, a projection 118, and a phase adjustment member 119 are provided in each of the transmission paths 114b. That is, unlike the waveguide 14 of the first embodiment, the waveguide 114 according to the present embodiment is provided with two openings 114 a and two projections 118. Here, the formation positions of the two openings 114 a are formed at mutually different positions.

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

As described above, by providing two openings 114 a and two projections 118 in the waveguide 114, the irradiation range of high frequency can be expanded. Thereby, a high frequency can be effectively irradiated with respect to the to-be-heated material set to the heating chamber (not shown) of the space wider than the heating chamber 10 of the heating cooker 1 of the said Embodiment 1. FIG.

Further, since the formation positions of the two openings 114a are formed at mutually different positions, it is possible to make the radiation range of the high frequency from the openings 114a of the respective transmission paths 114b different.

In addition, if the generation of high frequency by the magnetron 113 is controlled for every two transmission paths 114b of the waveguide 114, the heated object set in the heating chamber using only the projecting portion 118 of one of the transmission paths 114b. It becomes possible to heat things. That is, it is possible to partially heat the object set in the heating chamber.

As described above, if the number of openings 114 a is increased, the radiation range of high frequency can be finely controlled.

In the first and second embodiments, the projections 18 and the projections 118 have a conical shape and a flat top, but the present invention is not limited to this. In the following third embodiment, an example of the shape of the protrusion different from the first and second embodiments will be described.

Third Embodiment
Other embodiments of the present invention are described below. In addition, about the member which has the same function as the member demonstrated in the said embodiment for convenience of explanation, the same code | symbol is appended, and the description is not repeated.

The heating 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 seen from the upper side of the

protrusions

218 and 318 provided in the heating cooker according to the present embodiment.

The protrusion 218 has an octagonal shape as shown in FIG. 6A, and the protrusion 318 has a 12 pyramidal shape as shown in FIG.

As described above, even if the protrusions are not only conical but also polygonal pyramids such as an eight-pyramid shape, a twelve-pyramid shape, etc., high frequency can be appropriately reflected.

The shape of the protrusion is not limited to a conical shape such as the protrusion 18 or the protrusion 118, or a polygonal pyramid of the protrusion 218 or the protrusion 318, and heats the high frequency transmitted through the waveguide 14 It may be any shape that can radiate properly into the chamber 10.

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

According to the above configuration, the waveguide is formed with an opening at a position facing the bottom surface of the heating chamber, and a projection projecting toward the inside of the heating chamber at a position facing the opening. By being provided, the high frequency which transmitted the waveguide is emitted from the opening into the heating chamber after being reflected by the projection. As a result, compared to the high frequency directly emitted from the opening of the waveguide, the high frequency emitted against the projection is diffused more widely in the heating chamber, so that the object to be heated set in the heating chamber is diffused. It becomes possible to irradiate the high frequency evenly.

Therefore, a simple configuration in which the projection is provided in the waveguide, and without providing a stirring product of a drive system such as a turntable and a rotary antenna, and without setting it into a complicated waveguide shape, it is set in the heating chamber It becomes possible to warm the object to be heated evenly.

In the heating cooker according to aspect 2 of the present invention, in the above aspect 1, the projection 18 has a conical shape, a truncated cone shape, a polygonal pyramid shape, or a polygonal truncated pyramid shape with the heating chamber 10 side as an apex. May be

According to the above configuration, since the projection 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 projection into the heating chamber. Thereby, 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 a position where the high frequency is concentrated, the object to be heated can be heated more uniformly and efficiently. can do.

In the heating cooker according to aspect 3 of the present invention, in the

above aspect

1 or 2, the phase adjustment for adjusting the phase of the transmitted high frequency to the waveguide 14 upstream of the projection 18 A member 19 may be further provided.

According to the above configuration, the waveguide is further provided with the phase adjustment member for adjusting the phase of the transmitted high frequency on the upstream side of the projection, so that the waveguide is stable with respect to the projection. High frequency can be transmitted. As a result, high frequency radiation can be stably emitted from the projection into the heating chamber, so that the object to be heated set in the heating chamber can be warmed more evenly.

In the heating cooker according to aspect 4 of the present invention, in the above aspect 1, the protrusion 18 may be provided at a position in the waveguide 14 facing the center of the bottom of the heating chamber 10.

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

In the heating cooker according to aspect 5 of the present invention, in any one of the above aspects 1 to 3, the waveguide 114 is formed with a plurality of the openings 114a and corresponds to the respective openings 114a. The projection 118 may be provided at a position.

According to the above configuration, the waveguide is formed with a plurality of openings, and the projections are provided at the positions corresponding to the respective openings, so that the high frequency waves transmitted through the waveguide are each projection After being reflected by the part, the light is emitted from the respective openings into the heating chamber. As a result, the high frequency is widely diffused in the heating chamber, so that the high frequency can be more uniformly irradiated to the object set in the heating chamber.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and 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.

Reference Signs List 1 heating cooker 2 heating cooker 10 heating chamber 10a inner wall surface 11 tray 12 heated object 13 magnetron 14 waveguide 14a opening 15a upper heater 15b lower heater 16 cover 17 cover 18 protrusion 18 projection 19 phase adjustment member 113 magnetron 114 conduction Wave tube 114a Opening 114b Transmission path 118 Projection 119 Phase adjustment member 218 Projection 318 Projection

Claims

A heating cooker having at least a high frequency heating function,
A waveguide provided at an upper portion of a heating chamber for setting an object to be heated and guiding a high frequency into the heating chamber;
The waveguide is formed with an opening at a position facing the bottom surface of the heating chamber, and a projection protruding toward the inside of the heating chamber is provided at a position facing the opening. Features a cooking cooker.
The heating cooker according to claim 1, wherein the protrusion has a conical shape, a truncated cone shape, a polygonal pyramid shape, or a polygonal pyramid shape with the heating chamber side as a vertex.
3. The heating device according to claim 1, wherein a phase adjusting member for adjusting the phase of the high frequency wave to be transmitted is further provided on the upstream side of the protrusion in the waveguide. Cooking device.
The heating cooker according to claim 1, wherein the projection is provided at a position in the waveguide opposite to a center of a bottom surface of the heating chamber.
The said opening part is formed in multiple places in the said waveguide, The said projection part is provided in the position corresponding to each opening part, It is characterized by the above-mentioned. Heating cooker.