WO2019087419A1

WO2019087419A1 - Cooker

Info

Publication number: WO2019087419A1
Application number: PCT/JP2018/004645
Authority: WO
Inventors: 裕也渡邊; 上田　真也; 下田　英雄; 小川　将志
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: JP7045389B2; JPWO2019087419A1

Abstract

The cooker (1) according to the present invention includes: an upper heater (15a) which is disposed such that a projection position obtained by projecting the upper heater (15a) on a bottom surface of a heating chamber (10) is out of alignment with a center position of the bottom surface of the heating chamber (10); and a cover (16) which has a first reflection board (16a) that reflects, from the projection position toward a position situated beyond the center position, heat radiated by the upper heater (15a). This configuration enables a heater to apply sufficient heat to an item to be heated.

Description

Cooker

The present invention relates to a heating cooker having a heater heating function.

As a heating cooker provided with a general heater heating function and a high frequency heating function, for example, there is a high frequency heating cooker with a heater disclosed in Patent Document 1.

Japanese Patent Publication "Japanese Patent Application Laid-Open No. 2004-360963 (December 24, 2004)"

By the way, in the heating cooker provided with both a heater heating function and a high frequency heating function like the high frequency heating cooker with a heater disclosed by patent document 1, in order to realize a high frequency heating function in the upper part of a heating chamber In order to perform heater heating, the position of the heater at the upper part of the heating chamber is disposed at a position shifted from the center of the heating chamber. For this reason, in the position which shifts from the center position of a heating chamber, and is far from the heater arranged at the upper part of a heating chamber, the problem that a thing to be heated is not fully heated arises.

One embodiment of the present invention is a heating cooker capable of sufficiently heating the object to be heated by the heater even when the position of the heater disposed at the upper part of the heating chamber is offset from the center of the heating chamber. It aims to be realized.

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 provided with a heater heating function at least, and the heater provided in the upper part of a heating chamber, and the upper surface of the above-mentioned heater And a heater cover for reflecting the heat emitted by the heater toward the heating chamber, the heater projecting a projection position of the heater on the bottom surface of the heating chamber, and The heater cover is disposed at a position shifted from the central position, and the heater cover has a first reflection surface that reflects the heat emitted by the heater from the projected position toward the position beyond the central position. It is characterized by

According to one aspect of the present invention, even when the position of the heater disposed above the heating chamber is offset from the center of the heating chamber, sufficient heating by the heater can be performed on the object to be heated. it can.

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 the schematic perspective view which removed the door in the heating cooker shown in FIG. 2, and showed the waveguide and the cover exposed. It is a schematic diagram which indicated typically a cooking-by-heating machine shown in FIG. It is the schematic diagram which described typically the heating cooker for comparison of the heating cooker shown in FIG. (A) is a figure which shows schematic structure of the upper heater which only the outer surface of the heater pipe coated, and a lower heater, (b) is the figure in which the outer surface and inner surface of the heater pipe were coated. It is a figure which shows the arrangement | positioning position of the thermistor which measures the temperature of the upper heater arrange | positioned at the upper part of a heating chamber.

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 perform the heater heating function, the heating cooker 1 is provided with two heaters 15 each at the upper and lower portions of the heating chamber 10, as shown in FIG. The upper two heaters 15 are covered with a cover (heater 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 heater 15 and radiating it toward the tray 11 in the heating chamber 10. In addition, the lower two heaters 15 are covered with a cover 17 on the outside. Similar to 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 heater 15 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.

The details of the cover 16 will be described later.

(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 needle-like or may be slightly 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.

(Details of cover 16)
FIG. 4 is a schematic perspective view showing the waveguide 14 and the cover 16 exposed by removing the door 21 in the heating cooker 1 shown in FIG.

As shown in FIGS. 2 and 4, the two upper heaters (heaters) 15a and 15a are cylindrical heaters and extend in the longitudinal direction orthogonal to the direction in which the object 12 to be heated is taken in and out of the heating chamber 10. It is done. In the upper part of the heating chamber 10, as shown in FIG. 2, the waveguide 14 and the

upper heaters

15a and 15a are provided from a position far from the door 21. For this reason, the

upper heaters

15a and 15a are disposed at a position shifted from immediately above the center position of the heating chamber 10 to the door 21 side. In other words, the

upper heaters

15a and 15a are disposed at positions where the projection positions obtained by projecting the

upper heaters

15a and 15a onto the bottom surface of the heating chamber 10 and the center position of the bottom surface of the heating chamber 10 are shifted. In the present embodiment, a cylindrical heater is used as the upper heater 15a.

As shown in FIG. 2, the cover 16 is a first reflection plate that is inclined downward toward the door 21 on the side of the upper heater 15 a disposed on the side close to the door 21 that opens and closes the heating chamber 10 (first 1) Reflective surface 16a, and on the side of the upper heater 15a disposed on the side far from the door 21, a second reflective plate (second reflective surface) 16b inclined downward toward the opposite side to the door 21 side. The third reflector 16c is disposed above the two

upper heaters

15a and 15a, and is formed between the first reflector 16a and the second reflector 16b. Therefore, one of the two

upper heaters

15a and 15a is disposed close to the first reflection plate 16a, and the other is disposed close to the second reflection plate 16b.

In addition, in the cover 16 of the said structure, although the structure which provided the 3rd reflecting plate 16c between the 1st reflecting plate 16a and the 2nd reflecting plate 16b is shown, it is not limited to this. The cover 16 may be provided at a position where the first reflection plate 16a and the second reflection plate 16b face each other, and may not be provided with the third reflection plate 16c.

The inclination angles of the first reflection plate 16a and the second reflection plate 16b (angles inclined with respect to the upper surface of the heating chamber 10) are different. The inclination angle of the first reflection plate 16a is larger than the inclination angle of the second reflection plate 16b. Thereby, it becomes possible to reflect the heat which the upper heater 15a on the side close to the first reflection plate 16a radiates, and to heat the portion of the heating target 12 on the tray 11 far from the first reflection plate 16a. Regarding the inclination angle of the first reflection plate 16a, the arrangement position of the upper heater 15a, the height of the heating chamber 10, the size of the bottom surface, the size of the mounting position of the object 12 on the tray 11, etc. Is set to the optimum angle in consideration of In this case, not only the inclination angle of the first reflection plate 16a but also the inclination angle of the second reflection plate 16b are adjusted so that the object 12 placed on the tray 11 of the heating chamber 10 can be appropriately heated. You may

For example, as shown in FIG. 4, the inclination of the first reflection plate 16a is made by narrowing (indenting) a single plate so as to incline the interior excluding a part of both ends of the first reflection plate 16a. You may form. In this case, the strength of the first reflection plate 16a is increased by the stop portion of the first reflection plate 16a. Further, the diaphragm portion of the first reflection plate 16a can be easily formed by pressing one metal plate (reflection panel).

Further, both end portions of the upper heater 15a attached to the heating chamber 10 need a region slightly larger than the diameter of the heater pipe for attachment. For this reason, even if the first reflection plate 16a is at such an angle as to interfere with the heater both end portions (attachment portion) as it is, the central portion is recessed except for the portions corresponding to the both end portions, The interference can be avoided while setting the desired reflection angle.

Similarly to the first reflection plate 16a, the inclination of the second reflection plate 16b narrows (inverts) the single plate so as to incline the interior excluding a part of both ends of the second reflection plate 16b. It may be formed by

Thus, if the strength of the first reflecting plate 16a and the second reflecting plate 16b is increased, the strength of the entire cover 16 is also increased. Moreover, the strength of the cover 16 can be easily increased simply by pressing the first reflection plate 16a and the second reflection plate 16b.

Further, both end portions of the upper heater 15a attached to the heating chamber 10 need a region slightly larger than the diameter of the heater pipe for attachment. For this reason, even if the second reflection plate 16b is at such an angle as to interfere with the heater both end portions (attachment portion) as it is, the center portion is recessed except for the portions corresponding to the both end portions, The interference can be avoided while setting the desired reflection angle.

Furthermore, in the third reflection plate 16c, as shown in FIG. 4, a protrusion that protrudes outward is formed opposite to the first reflection plate 16a and the second reflection plate 16b. This further increases the strength of the cover 16.

The first reflection plate 16a reflects the heat emitted by the upper heater 15a from the projection position where the upper heater 15a is projected onto the bottom surface of the heating chamber 10, to a position beyond the central position of the heating chamber 10. If it can be done, it may be processed in any way.

Also, if the second reflector 16b can reflect the heat emitted by the upper heater 15a at a position before the position where heat is reflected by the first reflector 16a in the heating chamber 10, how can it be? You may process it.

(effect)
FIG. 5: is the schematic diagram which described typically the heating cooker 1 which concerns on this embodiment.

FIG. 6 is a schematic view schematically showing the heating cooker 2 for comparison, which differs from the heating cooker 1 shown in FIG. 5 in that the shape of the cover covering the

upper heaters

15a and 15a is different. .

When the waveguide 14 and the

upper heaters

15a and 15a are provided in the upper portion of the heating chamber 10 and the

upper heaters

15a and 15a are offset from directly above the center of the bottom of the heating chamber 10, as shown in FIG. In the conventional heating cooker 2, the inclination angles with respect to the upper surface of the heating chamber 10 of the 1st reflective plate 116a of the cover 116 and the 2nd reflective plate 116b are the same. For this reason, the heat radiated from the upper heater 15a mainly heats the position immediately below the upper heater 15a. That is, the portion not at the position corresponding to the position directly below the upper heater 15a of the object 12 placed on the tray 11 is not sufficiently heated.

On the other hand, in the heating cooker 1 according to this embodiment, as shown in FIG. 5, the inclination angle of the first reflection plate 16a is made larger than the inclination angle of the second reflection plate 16b, and the upper heater 15a The position where the heat radiated from the object to be heated 12 placed on the tray 11 in the heating chamber 10 can be also heated away from the first reflection plate 16a.

As described above, according to the heating cooker 1 of the first embodiment, the position of the upper heater 15a disposed in the upper part of the heating chamber 10 is offset from the center of the heating chamber 10 by the waveguide 14. However, the effect of sufficiently heating the object 12 by the upper heater 15a is achieved.

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.

Although the said embodiment demonstrated the example to which this invention was applied to the heating cooker 1 provided with the waveguide 14 for performing high frequency heating in the said Embodiment 1, this invention demonstrates the waveguide 14 for performing high frequency heating. It can apply also to the cooking cooker which is not equipped with. In particular, the present invention can be applied to a heating cooker in which the upper heater 15a is offset from the center of the heating chamber 10.

As described above, by adjusting the inclination angles of the first reflection plate 16a and the second reflection plate 16b of the cover 16, the object to be heated 12 in the heating chamber 10 can be appropriately heated, so the upper heater 15a The arrangement position of may be provided anywhere in the upper part of the heating chamber 10. That is, even if the upper heater 15a is shifted from the center position of the bottom surface of the heating chamber 10 by the design of the heating cooker 1, the inclination angles of the first reflecting plate 16a and the second reflecting plate 16b may be adjusted. It becomes possible to fully heat the to-be-heated material 12 mounted in the heating chamber 10. FIG. Therefore, according to the present invention, there is an effect that the design freedom of the heating cooker 1 is increased.

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.

Although the number of the upper heaters 15a is two in the first embodiment, the number of the upper heaters 15a may be one or three or more, and the first reflection of the cover 16 covering the upper heaters 15a is also possible. By adjusting the inclination angle of the plate 16a and the second reflection plate 16b, the object 12 in the heating chamber 10 can be sufficiently heated.

Moreover, in the heating cooker 1, in order to raise heating efficiency, it is possible to increase the number of upper heaters 15a, and also to increase the number of lower heaters 15b. Besides increasing the number of the upper heater 15a and the lower heater 15b, it is conceivable to increase the radiation efficiency of the upper heater 15a and the lower heater 15b in order to increase the heating efficiency.

(Heat radiation efficiency)
FIG. 7A is a view showing a schematic configuration of the upper heater 15a and the lower heater 15b in which the heat resistant coating is applied only to the outer surface of the heater pipe 102, and FIG. 7B is an outer surface and the inside of the heater pipe 102. It is a figure in which heat resistant coating was given to the surface. Here, since the upper heater 15a and the lower heater 15b have basically the same configuration, the upper heater 15a will be described below.

As shown in (a) and (b) of FIG. 7, the upper heater 15a includes a heater heating wire 101 as a heating element and a heater heating wire 101, and a heater pipe 102 for insulating and protecting the heater heating wire 101. , And an electrode 103 connected to the heater heating wire 101.

The heater pipe 102 may be any material as long as it is a heat-resistant material such as metal, glass or ceramic.

A heat resistant paint (heat resistant paint) is applied to the surface of the heater pipe 102. 7A shows a state in which only the outer surface of the surface of the heater pipe 102 is coated with the heat resistant paint, and FIG. 7B shows the outer surface and the inner surface of the heater pipe 102 above. It shows the state where the heat resistant paint is applied.

The heat-resistant paint uses a silicon-based black coating liquid. However, the heat-resistant paint may be a heat-resistant paint having a relatively high heat absorption efficiency, and the color may be dark green such as deep green or brown other than black.

As shown in (a) and (b) of FIG. 7, when heat-resistant coating is applied to the surface (outer surface, inner surface) of the heater pipe 102, the heat-resistant coating absorbs more heat generated by the heater heat wire 101, By releasing the heat to the outside, the heat generation temperature of the heater pipe 102 is lowered, and the radiation efficiency is improved. As shown in (a) of FIG. 7, even when heat-resistant coating is applied only to the outer surface of the heater pipe 102, the heat generation temperature of the heater pipe 102 is decreased and radiation efficiency is increased compared to the case where heat-resistant coating is not applied. Do. However, as shown in FIG. 7B, if heat coating is applied to the inner surface in addition to the outer surface of the heater pipe 102, the heat generation temperature of the heater pipe 102 is further reduced, and the radiation efficiency is improved.

(Measurement of heater)
FIG. 8 is a view showing the arrangement position of the thermistor 22 for measuring the temperature of the

upper heaters

15a and 15a arranged in the upper part of the heating chamber 10. As shown in FIG.

As shown in FIG. 8B, the thermistor 22 is installed in the cover 16 substantially perpendicularly to the longitudinal direction of the upper heater 15a as viewed from the top. Moreover, the thermistor 22 is disposed such that the temperature measurement portion at the tip end portion approaches the winding portion of the heater heating wire (FIG. 7) of the upper heater 15a.

That is, the thermistor 22 is disposed such that the tip end portion including the temperature measurement portion of the thermistor 22 approaches the upper heater 15a in a direction perpendicular to the longitudinal direction of the upper heater 15a.

By arranging the thermistor 22 as described above, the influence of the linear portion of the heater heating wire can be reduced and the temperature can be captured stably. Furthermore, as shown in FIG. 8A, the temperature can be more selectively sensed by inclining the tip of the thermistor 22 in the direction of the upper heater 15a.

Since the thermistor 22 is installed in the cover 16, the temperature change of the upper heater 15a can be caught more stably.

By arranging the thermistor 22 in the vicinity of the side surface of the heating chamber 10, it is possible to prevent the user from contacting the thermistor.

The arrangement position of the thermistor 22 is not limited to the position close to the upper heater 15a, and the direction in which the end portion provided with the temperature measurement portion of the thermistor 22 is perpendicular to the longitudinal direction of the upper heater 15a In the above, any position may be provided as long as it is disposed in the cover 16. It is arranged as.

[Summary]
The heating cooker according to aspect 1 of the present invention is a heating cooker having at least a heater heating function, and covers a heater (upper heater 15a) provided in the heating chamber 10 and the heater (upper heater 15a). And a heater cover (cover 16) for reflecting the heat emitted by the heater (upper heater 15a) toward the inside of the heating chamber 10, and the heater (upper heater 15a) is the heater (upper heater 15a) Is arranged so that the projection position obtained by projecting the light source onto the bottom surface of the heating chamber 10 and the center position of the bottom surface of the heating chamber 10 are shifted, and the heater cover (cover 16) It is characterized in that it has a first reflection surface (first reflection plate 16a) for reflecting the heat emitted by the heater (upper heater 15a) toward the position beyond the center position.

According to the above configuration, when the heater is disposed at a position where the projection position where the heater is projected on the bottom surface of the heating chamber and the center position of the bottom surface of the heating chamber are shifted, the heater cover is Since the first reflecting surface for reflecting the heat emitted by the heater is provided from the projection position to a position beyond the center position of the bottom surface of the heating chamber, the vicinity of the position directly below the heater in the heating chamber, The heat of the heater can be reflected to the vicinity of a position deviated from the position directly below the heater.

Thereby, even if the heater is disposed at a position where the projection position where the heater is projected on the bottom surface of the heating chamber and the center position of the bottom surface of the heating chamber are offset, The heating by the heater can be sufficiently performed.

In the heating cooker according to aspect 2 of the present invention, in the above aspect 1, the heater cover (cover 16) includes at least a reflection panel having the first reflection surface (first reflection plate 16a), and the first reflection The surface (first reflection plate 16a) may be formed by recessing a part of the reflection panel.

According to the above configuration, by forming the first reflective surface by indenting a part of the reflective panel, it is possible to increase the strength (such as bending strength) of the reflective panel. In addition, since the first reflective surface is formed by indenting a part of the reflective panel, it is possible to easily change the reflection angle of heat from the heater by adjusting the degree of indenting.

Furthermore, both end portions of the heater attached to the heating chamber require an area slightly larger than the diameter of the heater pipe for attachment. For this reason, even if the first reflection plate is at such an angle as to interfere with the heater both end portions (attachment portion) as it is, it is desirable to dent the central portion except the portions corresponding to the both end portions. The above-described interference can be avoided while setting the reflection angle of.

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

above aspect

1 or 2, the projection of the heater cover (cover 16) is more than the position where heat is reflected by the first reflection surface (first reflection plate 16a) At a position close to the position, a second reflection surface (second reflection plate 16b) may be provided to reflect the heat emitted by the heater (upper heater 15a).

According to the above configuration, the second reflection reflects the heat emitted from the heater to a position closer to the projected position where the heater is projected on the bottom surface of the heating chamber than the position where the heater cover reflects heat on the first reflection surface. By having a surface, it is possible to reflect heat at a position where it can not be reflected by the first reflection surface. Thus, the entire heating chamber can be sufficiently heated.

In the heating cooker according to aspect 4 of the present invention, in any one of the aspects 1 to 3, the heater cover (cover 16) has a reflective panel having the second reflective surface (second reflective plate 16b). And the second reflection surface (the second reflection plate 16b) is provided at a position facing the first reflection surface (the second reflection plate 16b), and is formed by recessing a part of the reflection panel. It is also good.

According to the above configuration, by forming the second reflective surface by indenting a part of the reflective panel, it is possible to increase the strength (such as bending strength) of the reflective panel. In addition, since the second reflective surface is formed by indenting a part of the reflective panel, it is possible to easily change the reflection angle of heat from the heater by adjusting the degree of indenting.

In the heating cooker according to aspect 5 of the present invention, in the above aspect 4, the heater (upper heater 15a) is composed of two cylindrical heaters, and one of the two cylindrical heaters has the first reflection. It may be disposed close to the surface (first reflection plate 16a), and the other may be disposed close to the second reflection surface (second reflection plate 16b).

According to the above configuration, the number of heaters can be two, and heat can be reflected by the reflection surface close to each heater, so that the heating chamber can be heated more efficiently.

In the heating cooker according to aspect 6 of the present invention, in any one of the aspects 1 to 5, the heater (upper heater 15a) is a heating element (heater heating wire 101), and the heating element (heater heating wire 101) The outer surface and the inner surface of the heater pipe 102 may be heat-resistant coated.

According to the above configuration, the heat transmittance of the heat pipe can be increased by applying the heat resistant coating to the outer surface and the inner surface of the heat pipe. As a result, the heat generated by the heat generating element in the heat pipe can be dissipated easily by the heat-resistant coating on the surface, so the temperature of the heat pipe itself can be lowered and the radiation efficiency can be improved.

The heating cooker according to aspect 7 of the present invention includes the thermistor 22 for measuring the temperature of the heater (upper heater 15a) according to any one of the above aspects 1 to 6, and the thermistor 22 The front end portion including the temperature measurement portion may be disposed in the heater cover (cover 16) in a direction perpendicular to the longitudinal direction of the heater (upper heater 15a).

According to the above configuration, the thermistor is disposed close to the heat source inside the heater by being disposed at a position where the tip end having the temperature measurement portion approaches in the direction perpendicular to the longitudinal direction of the heater. Temperature measurements can be made at the location. Thereby, the temperature can be captured stably.

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 15 heater 15a upper heater 15b lower heater 16 cover (heater cover)
16a 1st reflector (1st reflective surface)
16b Second reflector (second reflective surface)
16c third reflector 17 cover 18 projection 19 phase adjustment member 21 door 22 thermistor 101 heater heating wire (heating element)
102 heater pipe 103 electrode 116 cover 116 a first reflector 116 b second reflector

Claims

A heating cooker having at least a heater heating function,
A heater provided in the heating chamber,
And a heater cover that covers the heater and reflects the heat emitted by the heater toward the heating chamber.
The heater is disposed such that a projected position where the heater is projected on the bottom surface of the heating chamber is offset from a central position of the bottom surface of the heating chamber.
The heater cover is
A heating cooker characterized by comprising a first reflection surface for reflecting heat emitted by the heater from the projection position toward a position beyond the center position.
The heater cover at least includes a reflective panel having the first reflective surface,
The heating cooker according to claim 1, wherein the first reflective surface is formed by indenting a part of the reflective panel.
The heater cover is
The second reflective surface that reflects the heat emitted by the heater is provided at a position closer to the projection position than the position where the first reflective surface reflects heat. Cooker as described.
The heater cover includes a reflective panel having the second reflective surface,
The heating cooker according to claim 3, wherein the second reflection surface is provided at a position facing the first reflection surface, and is formed by indenting a part of the reflection panel.
The heater consists of two cylindrical heaters,
5. The apparatus according to claim 4, wherein one of the two cylindrical heaters is disposed close to the first reflection surface, and the other is disposed close to the second reflection surface. Cooker.
The heater comprises a heating element and a heater pipe covering the heating element.
The heating cooker according to any one of claims 1 to 5, wherein a heat resistant coating is applied to the outer surface and the inner surface of the heater pipe.
A thermistor for measuring the temperature of the heater,
7. The thermistor according to claim 1, wherein a tip end portion of the thermistor having a temperature measurement portion is disposed in the heater cover in a direction perpendicular to a longitudinal direction of the heater. The heating cooker according to any one of the above.