WO2022259628A1

WO2022259628A1 - Heating cooker

Info

Publication number: WO2022259628A1
Application number: PCT/JP2022/006575
Authority: WO
Inventors: 賢治森田; 紀之大都; 康之上甲
Original assignee: 日立グローバルライフソリューションズ株式会社
Priority date: 2021-06-08
Filing date: 2022-02-18
Publication date: 2022-12-15
Also published as: JP2022187557A

Abstract

This heating cooker comprises: a heating chamber (2) accommodating an object to be heated; a range heating means that heats the object to be heated with microwaves; a door (20A) with which it is possible to open/close the heating chamber (2); and a door base (21) having a choke structure part (26) provided to the outer periphery of the door (20A). The door (20A) has microwave shielding glass (40A) comprising: chamber-inside glass (41) and chamber-outside glass (42) which are disposed facing the heating chamber (2); and a conductive member (43) disposed between the chamber-inside glass (41) and the chamber-outside glass (42). The conductive member (43) is electrically connected to the door base (21).

Description

heating cooker

The present invention relates to a heating cooker.

A heating cooker cooks an object to be cooked by placing it in a heating chamber, and is equipped with an openable and closable door in the front part of the main body housing in order to store the object to be heated in the main body. This door is provided with a viewing window for checking the state of the food to be cooked in the heating chamber. It is composed of a metal plate (punching metal) in which punching holes are formed.

Patent Document 1 describes a structure in which a conductive film is provided on a transparent heat-resistant resin sheet between the inner and outer door glass so that cooking can be done while watching the cooking situation. Patent Document 2 describes a structure in which part or all of the punching metal is removed and a transparent conductor is used to improve visibility inside the refrigerator.

JP-A-2008-60015 JP-A-2005-26092

However, in the heating cooker described in Patent Document 1, a specific structure for electrically connecting the conductive films is not considered. Further, in the heating cooker described in Patent Document 2, a specific structure for electrically connecting the transparent conductor to the punching metal is not considered.

The present invention comprises a heating chamber containing an object to be heated, a heating source for microwave heating the object to be heated, a door that can be opened and closed with respect to the heating chamber, and a door base provided on the outer periphery of the door. wherein the door comprises a microwave shielding glass comprising a transparent glass positioned facing the heating chamber and a conductive member laminated to the glass, the conductive member comprising , and is electrically connected to the door base over the entire circumference.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance perspective view of the heating cooker of 1st Embodiment. It is a perspective view which shows the state which opened the door of the cooking-by-heating machine of 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional perspective view of the heating cooker of 1st Embodiment. FIG. 4 is a view in the direction of arrow X in FIG. 3; It is a cross-sectional perspective view which shows the door internal structure of the heating cooker of 1st Embodiment. FIG. 2 is a perspective view showing microwave shielding glass of the heating cooker of the first embodiment; FIG. 7 is an enlarged perspective view of a corner of the microwave shielding glass of FIG. 6; FIG. 4 is a perspective view showing another embodiment of microwave shielding glass; FIG. 9 is an enlarged perspective view of a corner of the microwave shielding glass of FIG. 8; It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 1st embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 2nd embodiment. It is a cross-sectional perspective view which shows the door internal structure of the heating cooker of 2nd Embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 3rd embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 4th embodiment. It is a cross-sectional perspective view which shows the door internal structure of the heating cooker of 5th Embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 5th embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 6th embodiment. It is a cross-sectional perspective view which shows the door internal structure of the heating cooker of 7th Embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 7th embodiment. It is a cross-sectional perspective view which shows the door internal structure of the heating cooker of 8th Embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of an 8th embodiment. It is a cross-sectional perspective view which shows the door internal structure of the heating cooker of 9th Embodiment. It is a sectional view showing the door internal structure of the cooking-by-heating machine of a 9th embodiment. It is a cross-sectional perspective view which shows the door internal structure of the heating cooker of 10th Embodiment. FIG. 20 is a cross-sectional view showing the internal structure of the door of the cooker of the tenth embodiment; It is a cross-sectional perspective view when the heating cooker of 11th Embodiment is seen from the door side. It is a cross-sectional perspective view when the cooking-by-heating appliance of 11th Embodiment is seen from inside. It is a top view which shows the door of the heating cooker of 11th Embodiment.

Hereinafter, modes for carrying out the present invention (hereinafter referred to as "embodiments") will be described in detail with reference to the drawings as appropriate. Note that the direction shown in FIG. 1 is used as a reference for the description.

(First embodiment)
FIG. 1 is an external perspective view of the heating cooker of the first embodiment.
As shown in FIG. 1, the heating cooker 1A includes a main body 10 covered with a cabinet 11 that covers the outer periphery, and a rotatable door 20A on the front surface of the main body 10. As shown in FIG. The door 20A includes a door base 21 (see FIG. 3), a door frame 22, a handle 23, an operation panel 24, and an outer door glass 25.

The door frame 22 is a resin-molded part that forms the outer periphery of the door 20, and is configured to surround the upper, lower, left, and right sides of the door 20A. The handle 23 is a handle for opening and closing the door 20A, and is integrally formed with the door frame 22 by a resin molded part. The operation panel 24 has an operation section and a display section. The outer door glass 25 is made of a transparent glass plate and fitted into the door frame 22 .

In addition, the door 20A prevents leakage of the microwaves used when heating the food to be cooked, confines the heat of the heater, and enables efficient heating.

FIG. 2 is a perspective view showing a state in which the door of the heating cooker of the first embodiment is opened.
As shown in FIG. 2, the heating cooker 1A includes a heating chamber 2 inside a main body 10 for storing an object to be heated (not shown). The heating chamber 2 has a bottom plate 2a, a back plate 2b, an upper plate 2c, a right side plate 2d and a left side plate 2e, and a rectangular opening is formed on the front surface. 2 shows a state in which the tray is stored on the bottom plate 2a of the heating chamber 2. As shown in FIG.

A rectangular frame-shaped outer peripheral surface 20a is formed on the back side of the door 20A (on the side of the main body 10 when the door 20A is closed). A heating chamber front plate 3 is provided around the entrance of the heating chamber 2 facing the outer peripheral surface 20a. The heating chamber front plate 3 has vertical surface portions 3a extending in the vertical direction (vertical direction) on the left and right sides, and horizontal surface portions 3b extending horizontally (horizontal direction) from the upper and lower ends between the vertical surface portions 3a. , is formed in the shape of a square frame. The vertical surface portion 3a and the horizontal surface portion 3b are formed of flat surfaces and come into surface contact with the outer peripheral surface 20a of the door 20A when the door 20A is closed.

FIG. 3 is a vertical cross-sectional perspective view of the heating cooker of the first embodiment. 3 partially omits illustration of components provided below the cabinet 11 (see FIG. 1) and the bottom plate 2a.
As shown in FIG. 3, a door base 21 having a choke structure 26 for preventing leakage of microwaves is provided inside the outer periphery of the door 20A (inside the door frame 22). The door base 21 constitutes the frame of the door 20A, and is formed by cutting, punching, bending, drawing, or otherwise processing a plate material made of metal such as iron.

The choke structure 26 is formed over the entire outer circumference of the door 20A. In FIG. 3, a part of the choke structure 26 extending horizontally at the top and bottom of the door 20A is illustrated, and the choke structure extending vertically at the left and right of the door 20A is omitted.

Below the bottom plate 2a, a microwave heating means 30 is provided that operates when microwave-heating the food to be cooked. The microwave heating means 30 is composed of a magnetron for generating microwaves, a waveguide for sending microwaves to the heating chamber 2, and the like. In addition, the heating cooker 1A of the present embodiment may be provided with an oven heating means using a heater (not shown). In addition, the heating cooker 1A of the first embodiment may be applied to a single-function type having only the range heating means 30, or to an oven range type having the range heating means 30, oven heating means, etc. You may

In addition, the door 20A is provided with a transparent microwave shielding glass 40A on the inner side of the outside door glass 25. This microwave shielding glass 40A has a function of blocking microwaves and preventing leakage of microwaves to the outside of the heating chamber 2 . In other words, in the heating cooker 1A of the first embodiment, the punching metal that has been conventionally used to achieve both visibility of the inside of the refrigerator and prevention of microwave leakage is not mounted.

FIG. 4 is a view in the direction of arrow X in FIG. FIG. 4 shows a state in which the door 20A is completely closed, and the outer peripheral surface 20a of the door 20A is in contact with the heating chamber front plate 3 provided around the front opening of the heating chamber 2 and closed. state.

As shown in FIG. 4, the microwave shielding glass 40A includes a chamber inner glass 41 (glass) located on the heating chamber 2 side, and a chamber outer glass 42 (glass) located on the opposite side (chamber outer side) to the heating chamber 2. and a conductive member 43 provided between the inside glass 41 and the outside glass 42 . In addition, the inside glass 41 and the outside glass 42 have the property of transmitting visible light, so that the food to be cooked in the heating chamber 2 can be visually recognized from the outside. Further, the inside glass 41 and the outside glass 42 are fixed to each other via an adhesive with a conductive member 43 interposed therebetween. Thus, the microwave shielding glass 40A is a multi-layered glass in which the inside glass 41 and the outside glass 42 are bonded and fixed.

In addition, the inside glass 41 and the outside glass 42 are made of glass plates with excellent heat resistance and impact resistance. Further, the inside glass 41 and the outside glass 42 have the same shape, and are configured such that the four sides of the upper, lower, right, and left sides coincide with each other.

For the conductive member 43, a metal mesh in which metal warp threads and metal weft threads are woven in a grid pattern can be applied. Also, the opening ratio of the metal mesh is set larger (for example, 70% or 78% or more) than the opening ratio (for example, 50%) of the punching metal that is generally used. As a result, the visibility when looking into the heating chamber 2 from the outside (the outside of the heating cooker 1A) can be improved compared to the case of using a punching metal (iron plate with a plurality of round holes formed therein). can. In addition, the conductive member 43 is not limited to a transparent conductor such as ITO (Indium Tin Oxide) as long as the visibility in the heating chamber 2 is not impaired, and a colored conductor may be applied. .

It should be noted that using a metal mesh for the conductive member 43 is also preferable in terms of detecting partial breakage or peeling of the conductive member 43 . If a metal mesh is used, the conductive member 43 can be seen thinly within the range where the visibility inside the heating chamber 2 is not impaired. When a part of the conductive member 43 is damaged or peeled off, it is difficult to detect it by a continuity test, so visual detection is required. If a transparent member is used, it becomes difficult to detect partial breakage or detachment. Therefore, it is preferable that the conductive member 43 be a member such as a metal mesh that can be visually observed within a range that does not impair the visibility in the heating chamber 2 in terms of detecting partial damage or peeling of the conductive member 43. .

Also, the conductive member 43 is not limited to a metal mesh, and may be a metal printed in a grid (mesh) pattern. For example, a pasty conductive member can be formed on the surface of the inside glass 41 or the outside glass 42 by screen printing.

FIG. 5 is a cross-sectional perspective view showing the internal structure of the door of the heating cooker of the first embodiment.
As shown in FIG. 5, the choke structure 26 is formed by bending a metal plate made of iron a plurality of times and forming a comb shape along the circumferential direction. Although FIG. 5 shows only a portion of the upper portion of the door 20A, the choke structure 26 is formed continuously over the entire perimeter of the upper, lower, left and right sides of the door 20A. It is. Incidentally, a part of the door base 21 is in contact with the heating chamber front plate 3, and if the door base 21 and the heating chamber front plate 3 are in contact with each other without gaps, microwaves do not leak from around the door 20A. . However, when the door base 21 and the heating chamber front plate 3 are heated to a high temperature by heating in an oven or the like, the flatness of the surface may change due to expansion of the metal. In this case, a slight gap is formed between the door base 21 and the heating chamber front plate 3, and microwaves may leak through the gap. Therefore, around the door base 21, the choke structure 26 is provided.

The door base 21 has a plate portion 21a extending downward at the front end of the choke structure portion 26, and a plate portion 21b extending rearward (toward the heating chamber front plate 3 side) at the lower end of the plate portion 21a. . Further, the door base 21 includes a plate portion 21c extending downward (upper end side of the microwave shielding glass 40A) from the rear end of the plate portion 21b, and an L extending forward from the lower end of the plate portion 21c and then downward. It has a character-shaped plate part 21d. The plate portion 21c contacts the heating chamber front plate 3 when the door is closed. The plate portion 21 d is arranged at a position facing the outside surface of the outer peripheral edge of the outside glass 42 . In FIG. 5, the door base 21 only shows a portion of the upper portion of the door 20A, but similar to the choke structure portion 26, the door base 21 extends over the entire circumference of the upper portion, lower portion, left side and right side of the door 20A. formed continuously.

FIG. 6 is a perspective view showing the microwave shielding glass of the heating cooker of the first embodiment, and FIG. 7 is an enlarged perspective view of a corner portion of the microwave shielding glass of FIG. 6 omits illustration of the right half of the microwave shielding glass 40A. 6 shows the shape of the conductive member 43 before being folded.

As indicated by the two-dot chain line in FIG. 6, the microwave shielding glass 40A is formed such that the conductive member 43 protrudes outward from between the inside glass 41 and the outside glass 42 of the refrigerator. In addition, the microwave shielding glass 40A is formed with rectangular notch portions 43S at the corners of the conductive member 43. As shown in FIG.

6, the microwave shielding glass 40A is such that the conductive member 43A protruding from the upper edge of the inside glass 41 and the outside glass 42 extends forward at the upper edge of the outside glass 42. , and then bent downward at the front end surface of the outside glass 42 . Further, the microwave shielding glass 40A is formed by bending the conductive member 43B projecting from the left edge of the inside glass 41 and the outside glass 42 forward at the left edge of the outside glass 42, and then The front end surface of the outer glass 42 is bent rightward. Further, the microwave shielding glass 40A is formed by bending the conductive member 43C protruding from the lower edge of the inside glass 41 and the outside glass 42 forward at the lower edge of the outside glass 42, and then It is bent upward at the front end face of 42 . Although not shown, in the microwave shielding glass 40A as well, the conductive member 43 protruding from the right edge of the inside glass 41 and the outside glass 42 is positioned in front of the right edge of the outside glass 42. , the front end face of the outside glass 42 is bent leftward.

The conductive member 43A is folded back forward so as to overlap the outer peripheral edge of the front end face of the outside glass 42 of the refrigerator. The conductive member 43B is folded back so as to overlap the outer peripheral edge of the front end surface of the outside glass 42 . The conductive member 43A and the conductive member 43B partially overlap each other at the corners. Although not shown, the other three corners are also bent in the same manner as described above so that the protruding conductive members 43 overlap each other. By using the conductive member 43 having the notch 43S at the corner, the conductive member 43 can be easily bent, and the productivity of the microwave shielding glass 40A can be improved.

8 is a perspective view showing another embodiment of microwave shielding glass, and FIG. 9 is an enlarged perspective view of a corner portion of the microwave shielding glass of FIG. 8 indicates the shape of the conductive member 43 before being folded.
As indicated by the two-dot chain line in FIG. 8, the microwave shielding glass 40B differs in that the shape of the conductive member 43 before folding is not formed with the notch 43S shown in FIG. The width of the conductive member 43 protruding from the inside glass 41 and the outside glass 42 is the same as in FIGS.

As shown in FIG. 9, in the microwave shielding glass 40B, the conductive member 43E projecting from the upper edge of the inside glass 41 and the outside glass 42 is bent forward at the upper edge of the outside glass 42. After that, the front end surface of the outside glass 42 is bent downward. Then, the conductive member 43F protruding from the left edge portion of the inside glass 41 and the outside glass 42 is folded back. Note that the corners are folded so that the overlapping conductive members 43 do not protrude outward.

In this way, the microwave shielding glass 40B shown in FIGS. 8 and 9 can cover the entire outer peripheral edge of the refrigerator outer glass 42 with the conductive member 43, so that the risk of microwave leakage can be reduced by the microwave shielding glass 40A. can be suppressed than

FIG. 10 is a cross-sectional view showing the internal structure of the door of the cooker of the first embodiment.
As shown in FIG. 10, the forwardly bent outer peripheral edge portion 43s of the conductive member 43A is arranged in a state of being overlapped with the outer peripheral surface 42a of the outside glass 42 facing forward. Further, the outer peripheral edge portion 43s of the conductive member 43A is arranged in a state of being overlapped with the front surface of the plate portion 21d of the door base 21 . Further, the outer peripheral edge portion 43s of the conductive member 43A is fixed to the door base 21 while being pressed against the rear surface 21d1 of the plate portion 21d from the inside of the chamber (heating chamber 2 side). That is, the silicone sealing agent 50 (sealing agent) is spread over the conductive member 43A (the conductive member 43 projecting outward from the inside glass 41 and the outside glass 42) and the door base 21 (

plate portions

21c, 21d). 43 s of the outer peripheral edge portions of the conductive member 43 A are fixed in close contact with the plate portion 21 d of the door base 21 . In addition, the silicone sealant 50 has heat resistance, adhesiveness, and the like.

Although not shown, the silicone sealant 50 is continuously applied to the entire top edge, bottom edge, left edge, and right edge of the microwave shielding glass 40A. . Thereby, the conductive member 43 provided on the microwave shielding glass 40A is electrically connected to the door base 21 (choke structure portion 26). The door base 21 is grounded through the main body 10 (housing).

As described above, the heating cooker 1A of the first embodiment can open and close the heating chamber 2 that houses the object to be heated, the range heating means 30 that microwave-heats the object to be heated, and the heating chamber 2. and a door base 21 provided on the outer periphery of the door 20A. The door 20A is a microwave shield having an inner glass 41 and an outer glass 42 arranged to face the heating chamber 2, and a conductive member 43 laminated on the inner glass 41 and the outer glass 42. It has glass 40A. This conductive member 43 is electrically connected to the door base 21 over the entire circumference. According to this, since the conductive member 43 of the microwave shielding glass 40A is electrically connected to the door base 21, microwaves leaking from the glass (the inside glass 41 and the outside glass 42) can be suppressed. .

Also, in the first embodiment, the conductive member 43 is a metal mesh formed in a mesh shape. According to this, the opening ratio can be increased more than that of punching metal generally used in the past, so that visibility can be improved when the door 20A is closed and the inside of the heating chamber 2 is viewed from outside. be possible. As a result, the cooking state of the food in the heating chamber 2 can be recognized more clearly.

Further, in the first embodiment, the conductive member 43 may be formed by printing metal into a mesh shape, in other words, a mesh-shaped metal film. According to this, the mesh shape can be formed more easily than a knitted shape such as a metal mesh, and the productivity of the conductive member 43 can be improved.

Also, in the first embodiment, the conductive member 43 is continuously connected to the door base 21 over the entire circumference. According to this, leakage of microwaves can be suppressed more reliably.

Further, in the first embodiment, the microwave shielding glass 40A is electrically conductive by the inside glass 41 located on the heating chamber 2 side of the conductive member 43 and the outside glass 42 located on the opposite side of the heating chamber 2. The elastic member 43 is sandwiched and adhered. According to this, since the inner glass 41 and the outer glass 42 are fixed by adhesion, it is possible to suppress scattering of the glass when the glass is broken due to an impact or the like.

Also, in the first embodiment, the conductive member 43 and the door base 21 are fixed with a silicone sealant 50 . According to this, it is possible to fix the conductive member 43 and the door base 21 in close contact with each other, thereby suppressing the leakage of microwaves more reliably, and furthermore, the gap between the microwave shielding glass 40A and the door base 21 can be prevented. It is possible to prevent foreign matter from entering the door 20A.

Further, in the first embodiment, by not mounting the punching metal on the door 20A, the weight of the door 20A can be reduced and the operability can be improved.

(Second embodiment)
FIG. 11 is a cross-sectional view showing the internal structure of the door of the cooker of the second embodiment. FIG. 12 is a cross-sectional perspective view showing the internal structure of the door of the cooker of the second embodiment. It should be noted that the same reference numerals are assigned to the same configurations as in the first embodiment, and redundant descriptions are omitted (the same applies to the third embodiment and subsequent embodiments).
As shown in FIG. 11, the heating cooker 1B of the second embodiment has a door 20B with microwave shielding glass 40C. The microwave shielding glass 40</b>C is composed of an inner-side glass 41 , an outer-side glass 42 , and a conductive member 43 . Further, the microwave shielding glass 40C has an outer peripheral edge portion 43t projecting upward in the vertical direction from the upper edge portions (peripheral edge portions) of the inside glass 41 and the outside glass 42 . The outer peripheral edge portion 43t protrudes to a position overlapping the plate portion 21c of the door base 21. As shown in FIG. Note that the outer peripheral edge portion 43 t extends to a position where it does not overlap the heating chamber front plate 3 .

The outer peripheral edge portion 43t of the conductive member 43 is fixed with the microwave shielding glass 40C pressed against the door base 21 (the rear surface of the plate portion 21c) from the inside of the refrigerator via the silicone sealant 50. be.

As shown in FIG. 12, the plate portion 21c of the door base 21 and the outer peripheral edge portion 43t of the conductive member 43 are fixed by welding. That is, welded portions (electrical connection portions, ground points) 60 formed by spot welding are intermittently formed along the circumferential direction of the door base 21 . Although not shown, the welded portion 60 is intermittently formed not only on the upper portion of the microwave shielding glass 40C but also on the lower portion, the left portion, and the right portion in the circumferential direction. The connection method between the plate portion 21c and the outer peripheral edge portion 43t is not limited to welding, and may be caulked or screwed, and may be selected as appropriate.

Also, the interval (pitch P) between the welded portions 60 is set to be (1/4) wavelength or less of the oscillation frequency of the range heating means 30 . For example, when the frequency is 2.45 GHz, the pitch P is set to 31 mm or less. It should be noted that the shorter the pitch P, the higher the microwave blocking performance.

It should be noted that the configuration is not limited to the configuration in which the welded portion 60 is intermittently formed, and a configuration in which the welded portion is continuously formed along the circumferential direction may be employed.

In the second embodiment configured as described above, the conductive member 43 is intermittently connected to the door base 21 over the entire circumference. According to this, the manufacturing is easier and the cost is lower than in the case of forming continuously over the entire circumference.

Also, in the second embodiment, the intermittently connected welded portion 60 is formed by welding. According to this, the electrical connection can be formed reliably and quickly.

Also, in the second embodiment, the pitch of the intermittently connected welded portions 60 is equal to or less than (1/4) wavelength of the oscillation frequency of the range heating means 30 . According to this, it is possible to reliably block microwaves.

(Third embodiment)
FIG. 13 is a cross-sectional view showing the internal structure of the door of the cooker of the third embodiment.
As shown in FIG. 13, the heating cooker 1C of the third embodiment includes a door 20C using a silicone sealant 51 (conductive sealant) instead of the silicone sealant 50 of the first embodiment. This silicone sealant 51 is electrically conductive, unlike the silicone sealant 50 of the first embodiment. For example, the silicone sealant 51 is a mixture of silicone resin and a conductive material such as carbon black. As in the first embodiment, the outer peripheral edge portion 43s of the conductive member 43A is fixed to the door base 21 while being pressed against the rear surface of the plate portion 21d from the inside of the chamber (heating chamber 2 side). Thereby, the conductive member 43 and the door base 21 are electrically connected.

In the third embodiment configured as described above, the conductive member 43 and the door base 21 are fixed by the conductive silicone sealant 51 . According to this, electrical connection can be obtained more reliably than with the silicone sealant 50 of the first embodiment.

(Fourth embodiment)
FIG. 14 is a sectional view showing the internal structure of the door of the cooker of the fourth embodiment.
As shown in FIG. 14, the heating cooker 1D of the fourth embodiment includes a door 20D with microwave shielding glass 40D instead of the microwave shielding glass 40A of the first embodiment. This microwave shielding glass 40</b>D includes an inner side glass 41 , an outer side glass 44 , and a conductive member 43 .

The outside glass 44 has a shorter outer circumference than the inside glass 41 and has a slightly smaller outer shape than the inside glass 41 . The outside glass 44 is laminated so as not to protrude from the inside glass 41 , and a stepped portion 40 a is formed between the outside glass 44 and the inside glass 41 . The outer peripheral edge of the conductive member 43 is formed larger than the outer peripheral edge of the refrigerator outer glass 44 . As a result, the outer peripheral edge portion 43u of the conductive member 43 is exposed at the stepped portion 40a facing the outside of the refrigerator. Further, the plate portion 21d of the door base 21 is set to a length that does not contact the outside glass 44 of the refrigerator.

The outer peripheral edge portion 43u of the conductive member 43 is fixed via the silicone sealant 50 while being pressed against the rear surface of the plate portion 21d of the door base 21 . Although not shown, the outer peripheral edge portion 43u is formed so as to be exposed on the four sides of the upper, lower, left, and right sides of the inside glass 41, and is in contact with the entire periphery of the door base 21 to provide an electrical connection. It is connected to the.

In the fourth embodiment configured as described above, the outside glass 44 has a shorter outer circumference than the inside glass 41, and the conductive member 43 is exposed on the outside surface of the inside glass 41. According to this, it is not necessary to arrange the conductive member 43 protruding from the inside glass 41 or the outside glass 44, so that the conductive member 43 can be stably pressed against the door base 21 (plate portion 21d). and electrical connection can be reliably obtained.

(Fifth embodiment)
15 is a cross-sectional perspective view showing the door internal structure of the heating cooker of the fifth embodiment, and FIG. 16 is a sectional view showing the door internal structure of the heating cooker of the fifth embodiment.
As shown in FIG. 15, the heating cooker 1E of the fifth embodiment has a door 20E in which another choke structure 27 is added to the heating cooker 1A of the first embodiment. Like the choke structure 26 , the choke structure 27 blocks microwaves leaking from the heating chamber 2 and is formed integrally with the door base 21 . The choke structure portion 27 is provided inside the choke structure portion 26 provided on the outer periphery of the door 20E. In other words, the choke structure 27 is positioned between the outer door glass 25 and the outer peripheral edge of the microwave shielding glass 40A.

Like the choke structure 26, the choke structure 27 is formed by bending a metal plate made of iron a plurality of times and forming a comb shape along the circumferential direction. Although only a portion of the upper portion of the door 20E is shown in FIG. 15, the choke structure portion 27 is formed over the entire circumference of the upper portion, lower portion, left side and right side of the door 20E.

As shown in FIG. 16, the choke structure portion 27 is formed continuously with the lower end of the plate portion 21d of the door base 21. As shown in FIG. That is, a plate portion 27a extending forward from the lower end of the plate portion 21d, a plate portion 27b extending vertically downward from the front end of the plate portion 27a, a plate portion 27c extending rearward from the lower end of the plate portion 27b, and the plate portion 27c It has a plate portion 27d that extends shorter than the plate portion 27b vertically upward from the rear end of the portion 27c, and a plate portion 27e that extends short forward from the upper end of the plate portion 27d.

A gap S1 is formed between the plate portion 27d of the choke structure portion 27 and the refrigerator-side glass 42 of the microwave shielding glass 40A. This prevents the choke structure 27 from contacting the outside glass 42 and damaging the outside glass 42 .

In addition, since the chalk structure 27 is located on the outer periphery of the microwave shielding glass 40A, it is possible to prevent loss of visibility when viewing the inside of the heating chamber 2 from outside the refrigerator.

In the fifth embodiment configured as described above, a choke structure portion 27 separate from the choke structure portion 26 is provided inside the choke structure portion 26 . According to this, leakage of microwaves from the heating chamber 2 can be further suppressed.

In the fifth embodiment, the case where the choke structure 27 is integrated with the door base 21 has been described as an example. good too. In that case, the choke structure 27 and the door base 21 can be connected by welding, caulking or screwing. Also, the pitch between the welded parts, the pitch between the crimped parts and the crimped parts, and the pitch between the screwed parts are set to 1/4 wavelength or less of the oscillation frequency of the microwave heating means 30 .

(Sixth embodiment)
FIG. 17 is a cross-sectional view showing the internal structure of the door of the heating cooker of the sixth embodiment.
As shown in FIG. 17, the heating cooker 1F of the sixth embodiment includes a door 20F obtained by adding a choke structure portion 28 as another choke structure to the microwave shielding glass 40D of the fourth embodiment. This choke structure portion 28 is formed integrally with the door base 21 .

The choke structure portion 28 includes a plate portion 28a extending forward from the lower end of the plate portion 21d, a plate portion 28b extending vertically downward from the front end of the plate portion 28a, and a plate portion 28c extending rearward from the lower end of the plate portion 28b. A plate portion 28d extending shorter than the plate portion 28b vertically upward from the rear end of the plate portion 28c, and a plate portion 28e extending short forward from the upper end of the plate portion 28d. The

plate portions

28a, 28b, 28d and 28e are configured in the same manner as the

plate portions

27a, 27b, 27d and 27e of the fifth embodiment. The plate portion 28c is formed shorter than the plate portion 27c of the fifth embodiment by the plate thickness of the outside glass 44 or more. Thereby, a gap S2 is formed between the plate portion 28d of the chalk structure portion 28 and the outside glass 44 of the refrigerator. Thus, the choke structure 28 can prevent the outside glass 44 from being damaged.

(Seventh embodiment)
FIG. 18 is a cross-sectional perspective view showing the internal structure of the door of the cooker of the seventh embodiment. FIG. 19 is a cross-sectional view showing the internal structure of the door of the cooker of the seventh embodiment.
As shown in FIG. 18, the cooker 1G of the seventh embodiment has a door 20G with a chalk structure 29 that is separate from the

chalk structures

26, 27, and 28. As shown in FIG. The choke structure portion 29 is provided with

choke structure portions

29 a and 29 b (so-called double choke structure) in two upper and lower stages, and is formed integrally with the door base 21 .

As shown in FIG. 18, the choke structure portion 29a is positioned below (inside) the choke structure portion 29b and is formed in a comb shape along the circumferential direction. The choke structure portion 29b is formed at a position where the comb teeth of the choke structure portion 29a are missing, and is formed in a comb shape along the circumferential direction. By providing such a choke structure 29, it is possible to improve the microwave shielding performance compared to the single-

stage choke structures

27 and 28. FIG. Also, by applying the choke structure 29, it is possible to increase the tolerance for product variations.

As shown in FIG. 19, the choke structure portion 29 is located inside the outer peripheral edge portion 43s of the conductive member 43. As shown in FIG. A gap S3 is formed between the chalk structure portion 29a and the outside glass 42 of the refrigerator. A gap S4 is formed between the chalk structure portion 29b and the outside glass 42 of the refrigerator. As a result, it is possible to prevent the outside glass 42 from being damaged by the chalk structure portion 29 .

In the seventh embodiment, the choke structure 29 is integrally formed with the door base 21. However, as described in the fifth embodiment, the choke structure 29 and the door base 21 and may be configured as separate parts (separate bodies). In that case, the choke structure 29 and the door base 21 are connected to each other by welding, crimping or screwing. Also, the pitch between the welded parts, the pitch between the crimped parts and the crimped parts, and the pitch between the screwed parts are set to 1/4 wavelength or less of the oscillation frequency of the microwave heating means 30 .

(Eighth embodiment)
FIG. 20 is a cross-sectional perspective view showing the internal structure of the door of the heating cooker of the eighth embodiment. FIG. 21 is a cross-sectional view showing the internal structure of the door of the heating cooker of the eighth embodiment.
As shown in FIG. 20, the heating cooker 1H of the eighth embodiment includes a door 20H with microwave shielding glass 40E instead of the microwave shielding glass 40D of the fourth embodiment. The microwave shielding glass 40</b>E includes an inner-side glass 45 , an outer-side glass 42 , and a conductive member 43 .

The inner glass 45 has a shorter outer circumference than the outer glass 42 and has an outer shape that is one size smaller than the outer glass 42 . Further, the inside glass 45 is located inside the outer peripheral portion of the outside glass 42 , and a stepped portion 40 b is formed between the outside glass 42 and the inside glass 45 . An outer peripheral edge portion 43v of the conductive member 43 is exposed at the stepped portion 40a. Further, the conductive member 43 is configured so as not to protrude from the outside glass 42 of the refrigerator.

The door 20H also has a holding member 70 for holding the microwave shielding glass 40E. The holding member 70 includes a holding plate portion 70a arranged along the plate portion 21a of the door base 21, a holding plate portion 70b arranged along the plate portion 21b, and a holding plate portion 70b arranged along the plate portion 21c. It includes a plate portion 70c and a holding plate portion 70d arranged along the plate portion 21d. For example, the holding plate portion 70a is fixed to the plate portion 21a by welding, crimping, screwing, or the like. As a method for fixing the holding member 70, the plate portion 21a of the door base 21 and the holding plate portion 70a may be fastened together to the resin member of the door frame 22 using screws.

As shown in FIG. 21, the outer peripheral surface of the outside glass 42 is pressed against the rear surface of the holding plate portion 70d of the holding member 70, and the plate portion 21d of the door base 21 is pressed against the outer peripheral edge portion 43v of the conductive member 43. In this state, the microwave shielding glass 40E is fixed to the door base 21 using the silicone sealant 50. As shown in FIG. The silicone sealant 50 is applied across the plate portion 21d of the door base 21 and the inside glass 45 of the refrigerator.

The eighth embodiment configured in this manner includes a holding member 70 that presses and holds the outside glass 42 . The inside glass 45 has a shorter outer periphery than the outside glass 42 , and the conductive member 43 is exposed on the inside (heating chamber 2 side) surface of the outside glass 42 . According to this, even if the outside glass 42 is formed larger than the inside glass 45 and the exposed conductive member 43 (peripheral edge portion 43v) faces the inside of the chamber, the door base 21 can be connected to the conductive member. It can be fixed by pressing against 43, and an electrical connection can be obtained.

(Ninth embodiment)
FIG. 22 is a cross-sectional perspective view showing the internal structure of the door of the heating cooker of the ninth embodiment. FIG. 23 is a cross-sectional view showing the internal structure of the door of the cooker of the ninth embodiment.
As shown in FIG. 22, the heating cooker 1I of the ninth embodiment has a door 20I provided with microwave shielding glass 40F made of single layer glass 46 (glass). This microwave shielding glass 40F has a transparent single layer glass 46 and a conductive member 43 provided on the surface of this single layer glass 46 on the outer side of the chamber. In addition, the single-layer glass 46 and the conductive member 43 have shapes that match each other. The single layer glass 46 is similar to the inside glass 41 and the outside glass 42 used for the microwave shielding glass 40A.

As shown in FIG. 23, the microwave shielding glass 40F is arranged with the conductive member 43 facing the outside of the refrigerator (the side opposite to the heating chamber 2). Also, the conductive member 43 is arranged in the space Q between the single-layer glass 46 and the outer door glass 25 . Then, the outer peripheral edge portion 43w of the conductive member 43 is pressed against the rear surface of the plate portion 21d of the door base 21 and fixed via a silicone sealant (not shown).

In the ninth embodiment configured as described above, the door 20I includes a transparent outer door glass 25 arranged outside the microwave shielding glass 40F. The microwave shielding glass 40F is single-layer glass 46 . A conductive member 43 is provided on the single-layer glass 46 on the outside surface of the container. According to this, since the conductive member 43 is positioned in the sealed space Q between the outer door glass 25 and the single-layer glass 46, the conductive member 43 (metal mesh or the like) is prevented from being damaged. be able to. Further, by using the single-layer glass 46, the microwave shielding glass 40F can be made lighter, and the door 20I can be made lighter.

(Tenth embodiment)
FIG. 24 is a cross-sectional perspective view showing the internal structure of the door of the heating cooker of the tenth embodiment. FIG. 25 is a cross-sectional view showing the internal structure of the door of the heating cooker of the tenth embodiment.
As shown in FIG. 24, the heating cooker 1J of the tenth embodiment has a door 20J with a choke structure 27 added to the door 20I of the ninth embodiment. The choke structure 27 is similar to the choke structure 27 of the fifth embodiment.

As shown in FIG. 25, a gap S5 is formed between the conductive member 43 and the plate portion 27d of the choke structure portion 27. As shown in FIG. As a result, it is possible to prevent the conductive member 43 from being damaged by the choke structure portion 27 . 24 and 25, illustration of a silicone sealant for fixing the conductive member 43 while being pressed against the plate portion 21d is omitted.

(Eleventh embodiment)
26 is a cross-sectional perspective view of the door internal structure of the heating cooker of the eleventh embodiment when viewed from the door side, and FIG. 27 is the door internal structure of the heating cooker of the eleventh embodiment viewed from the inside of the refrigerator. FIG. 28 is a plan view showing the structure of the door of the heating cooker of the eleventh embodiment.
As shown in FIGS. 26 and 27, the heating cooker 1K of the eleventh embodiment includes a heating chamber 2 containing an object to be heated, microwave heating means 30 (heat source) for heating the object to be heated, A door 20K that can be opened and closed with respect to the heating chamber 2, an outer door glass 91 and an inner door glass 92 provided on the outer side and the inner side of the door 20K, and a door base 21 are provided.

At least one of the outer door glass 91 and the inner door glass 92 is composed of double glazing that is adhesively fixed. That is, of the outer door glass 91 and the inner door glass 92, only the outer door glass 91 may be made of double glazing, or only the inner door glass 92 may be made of double glazing, or both may be made of double glazing. may Double glazing is obtained by fixing two or more glass plates with an adhesive.

The punching metal 93 is formed integrally with the door base 21 and electrically connected. As shown in FIG. 28, this punching metal 93 is an iron plate with a plurality of round holes arranged vertically and horizontally.

By the way, there is the problem that the glass will shatter if the heating cooker is dropped or the door glass is impacted. Therefore, by configuring as in the eleventh embodiment, at least one of the outer door glass 91 and the inner door glass 92 is made of multi-layered glass, so that it is possible to suppress the scattering of the glass due to a drop or impact. Become.

It should be noted that the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the first embodiment and the tenth embodiment may be combined as appropriate.

1A to 1I heating cooker 2 heating chamber 3 heating chamber front plate 20A to 20I door 21

door base

21a, 21b, 21c, 21d plate portion 25 outer door glass 26

choke structure portion

27, 28 choke structure portion (another choke structure portion )
29 choke structure (two-stage choke structure)
30 Microwave heating means (heating source)
40A to 40F

Microwave shielding glass

41, 45 Inside glass (glass)
42, 44 outside glass (glass)
43

Conductive member

43s, 43t, 43u, 43v, 43w Outer peripheral edge 46 Single layer glass (glass)
50 silicone sealant (sealant)
51 silicone sealant (conductive sealant)
60 weld (electrical connection)
70 holding member P pitch Q space S5 gap

Claims

a heating chamber containing an object to be heated;
a heating source that microwave-heats the object to be heated;
a door that can be opened and closed with respect to the heating chamber;
a door base provided on the outer periphery of the door,
the door has a microwave shielding glass comprising a transparent glass placed facing the heating chamber and a conductive member laminated to the glass;
The heating cooker, wherein the conductive member is electrically connected to the door base over the entire circumference.
In the heating cooker according to claim 1,
The heating cooker, wherein the conductive member is a metal mesh formed in a mesh shape.
In the heating cooker according to claim 1,
The heating cooker, wherein the conductive member is formed by printing a metal in a mesh shape.
In the heating cooker according to claim 1,
The heating cooker, wherein the conductive member is continuously connected to the door base over the entire circumference.
In the heating cooker according to claim 1,
The heating cooker, wherein the conductive member is intermittently connected to the door base over the entire circumference.
In the heating cooker according to claim 5,
The heating cooker, wherein the intermittently connected electrical connections are connected by welding, crimping, or screwing.
In the heating cooker according to claim 6,
The heating cooker, wherein the pitch of the intermittently connected electrical connection parts is equal to or less than (1/4) wavelength of the oscillation frequency of the heating source.
In the heating cooker according to claim 1,
The microwave shielding glass is constructed by sandwiching and bonding the conductive member between an inner glass located on the heating chamber side and an outer glass located on the opposite side of the heating chamber. A heating cooker characterized by:
In the heating cooker according to claim 8,
The heating cooker, wherein the outer glass is formed to have a shorter outer periphery than the inner glass, and the conductive member is exposed to the outer surface of the inner glass.
In the heating cooker according to claim 8,
A holding member that presses and holds the outside glass of the refrigerator,
The heating cooker, wherein the inside glass has a shorter outer circumference than the outside glass, and the conductive member is exposed on the inside surface of the outside glass.
In the heating cooker according to claim 1,
said door comprising a transparent outer door glass positioned outside said glass cabinet;
The microwave shielding glass is a single layer glass,
The heating cooker, wherein the single-layer glass is provided with the conductive member on the outer surface of the refrigerator.
In the heating cooker according to claim 1,
The door base is provided with a choke structure,
A heating cooker, wherein a chalk structure separate from the chalk structure is additionally provided inside the chalk structure.
In the heating cooker according to claim 12,
The heating cooker, wherein the separate chalk structure part is a chalk structure part arranged in two stages, one on the inside and one on the outside, with respect to the surface direction of the glass.
In the heating cooker according to claim 12 or claim 13,
The heating cooker, wherein the another choke structure is arranged with a gap from the conductive member.
In the heating cooker according to claim 1,
The heating cooker, wherein the conductive member and the door base are fixed with a sealant.
In the heating cooker according to claim 1,
The heating cooker, wherein the conductive member and the door base are fixed by a conductive sealant.
A heating chamber containing an object to be heated, a heating source for microwave heating the object to be heated, a door that can be opened and closed with respect to the heating chamber, and a pair of glasses provided on the outside and inside of the door. , the door base and the
A heating cooker, wherein at least one of the pair of glasses is composed of double-layered glass that is adhesively fixed.