JP2000205571A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure good cooking by preventing radiation of heat from the window glass of a door thereby making uniform the temperature distribution in the cooking chamber. SOLUTION: A heating cooker comprises a housing 2 employing a reflector on the chamber wall (ceiling wall 12, side wall 13, rear wall) and having a cooking chamber provided with an opening 11 in the front, a heater 20 disposed in the cooking chamber, a mounting net 15 disposed under the heater 20, and a door 130 for opening/closing the opening 11 applied with a partially transparent window glass 133 wherein a heat shield plate 140 for covering the window glass 133 selectively is provided on the cooking chamber side of the door 133.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device for heating an object to be cooked in a cooking chamber with a heater, such as an oven toaster, for example.

[0002]

2. Description of the Related Art Conventionally, there has been widely used a heating cooker such as an oven toaster which is provided with a heater in a cooking chamber and heats, that is, makes a toast by heating or baking an object to be cooked, for example, bread put in the cooking chamber by the heater. Used in homes. Here, a conventional heating cooker will be described with reference to FIGS.

In FIG. 4, reference numeral 1 denotes a cooking device,
The heating cooker 1 includes a housing 2 in which a cooking chamber 10 is formed, a heater 20 disposed in the housing 2, and a control circuit (not shown) for controlling the energizing time of the heater and the like. Have been.

An opening 11 is formed in the front of the cooking chamber 10, that is, in the front of the housing 2, for taking in and out of a cooking object or a cooking object. 12, the left and right side walls 13 (only one side is shown), the rear wall 14, and the bottom wall (not shown) are made of a reflection plate made of a material having high heat reflection efficiency, such as a galvanized steel plate.

[0005] Further, a placing net 15 for placing an object to be cooked is located slightly below the middle portion in the vertical direction of the cooking chamber 10.
Is provided so as to protrude and retract from the opening 11 in conjunction with opening and closing of an opening / closing door 30 described later. A pair of slide shafts 16a and 16b (only one side is shown) project from the placement net 15 on both sides at the rear end of the kitchen net 10. The slide shafts 16a and 16b are provided on the left and right side walls of the cooking chamber 10. 13 is slidably supported by a slit-like guide hole 17 (only one side is shown).

Although not shown, one end of an operating arm is attached to a tip end of the slide shaft 16b, that is, a portion protruding from the guide hole 17, and the other end of the operating arm is attached to the opening / closing door 30. The opening and closing operation of the opening and closing door 30 causes the opening and closing of the opening 11. That is, the placement net 15 projects forward from the opening 11 in conjunction with the operation of opening the opening / closing door 30, and sinks into the cooking chamber 10 in conjunction with the closing operation.

In the cooking chamber 10, an upper heater (not shown) is provided above the placing net 15, that is, at a position near the ceiling wall 12, and below the placing net 15, ie, at the bottom wall. The heater 20 is provided at a position in the vicinity of. The heater 20 is mounted via a socket 21.

Next, the door 3 for opening and closing the opening 11
Reference numeral 0 denotes a frame body 31 having a rectangular window 32 formed thereon as shown in FIGS. 5 and 6, and a window glass 33 attached to the window 32 and made of transparent heat-resistant glass. The lower end of the frame 31 is attached to the lower edge of the lower end of the opening 11 by hinge means (not shown), and the hinge means is pivotally attached to the housing 2 so as to be openable and closable. The frame 3
A handle 34 for opening / closing operation is attached to the upper part of 1.

[0009] The frame 31 is shown in FIGS.
As shown in the figure, an outer frame 36 formed by a front wall 36a formed in a rectangular shape, a peripheral side wall 36b formed on an outer peripheral edge of the front wall 36a, a rear wall 37a, and the rear wall 37a
And an inner frame 37 formed from a peripheral wall 37b fitted inside the peripheral wall 36b.

The front wall 36a of the outer frame 36 is formed with one window hole 36c forming a rectangular window, and the opening edge of the window hole 36c faces the inner frame 37 side. The contact edge 36d is provided so as to protrude.

A window 37c is formed on the rear wall 37a of the inner frame 37 to form a window. Positioning pieces 37d and 37e projecting outward are provided on the upper edge and both side edges of the window hole 37c, and an L-shaped support piece 37f is formed on the lower edge.

A lower positioning projection 3 formed at a lower edge of the window hole 37c and spaced apart from each other as shown in FIGS.
7g, and an upper positioning projection 37h (see FIG. 6) is also provided on the upper edge corresponding to the lower positioning projection 37g.

The positioning piece 37d of the inner frame 37,
A window glass 33 is attached to the positioning piece 37e and the L-shaped support piece 37f.
Then, the peripheral wall 37b is attached to the peripheral wall 3 of the outer frame 36.
6b, the outer frame 36 and the inner frame 37 are joined by joining means such as screws (not shown) to form the forming door 30.

In the assembled state, as shown in FIG. 6, the window glass 33 surrounds the positioning piece 3 of the inner frame 37.
7d, the positioning piece 37e, and the L-shaped support piece 37f restrict the movement in the circumferential direction. The movement in the front-rear direction is controlled by the lower positioning projection 37g and the upper positioning projection 3.
7 h and the abutment edge 36 d of the outer frame 36 are attached to the window 32 composed of both window holes 36 c and 37 c.

An operation panel 3 is provided on the right front side of the opening 11 in FIG. 4 as shown in FIG. 4, and the operation panel 3 has setting buttons 4a through 4b for setting the amount of heat generated by the heater 20. 4c, a start switch button 4d and an operation knob 5 of a timer for setting a cooking time are provided.

On the back side of the operation panel 3 of the housing 2, the amount of heat, that is, the amount of electricity, is set by the setting buttons 4a to 4c for setting the amount of heat and the operation knob 5 of the timer for setting the cooking time. , A control circuit (not shown), a timer, and the like.

In FIG. 4, reference numeral 6 denotes a power cord for supplying power to the heater 30 and a control circuit (not shown).

When cooking the object to be cooked, the opening and closing door 30 is opened, the object to be cooked is placed on the placement net 15, and then the opening and closing door 30 is closed. By setting the amount, that is, the intensity of the heating, and setting the cooking time, and operating the start switch button 4d, the heater 20 is energized for the cooking time set at a predetermined heating value, and the object to be cooked is heated. Are cooked and cooked.

By the way, the opening and closing door 30 of the above-mentioned conventional heating cooker 1 is provided with a transparent window glass 33 for visually confirming the cooking condition of the object to be cooked in the cooking chamber 10. The window glass 33 has poor heat reflection efficiency and easily allows the temperature in the cooking chamber 10 to escape to the outside.
Among the temperatures inside 0, the temperature on the opening / closing door 30 side, that is, the front side of the cooking chamber 10 becomes low and the temperature distribution is not uniform, so that the object to be cooked is not uniformly cooked. In other words, of the objects placed on the placement net 15, the portion located at the back of the cooking chamber 10 is not cooked well because the front portion is not sufficiently heated even if it is cooked well. Further, if the cooking time or the like is set so as to heat and cook the front part in a good state, the part located at the back will be overheated and not well cooked.

This means that, for example, when it is desired to apply a suitable browning to the surface such as toast or gratin,
Good cooking cannot be achieved, for example, resulting in burnt spots, and the appearance is impaired.

[0021]

As described above, in the conventional heating cooker 1, the window glass 33 provided in the opening / closing door 30 for opening and closing the opening 11 of the cooking chamber 10 has poor heat reflection efficiency. In addition, the temperature inside the cooking chamber 10 is easily released to the outside, so that the temperature at the front side inside the cooking chamber 10 is low, and the temperature distribution is not uniform. In addition, when it is necessary to provide appropriate browning on the surface of the food, there is a problem that good cooking cannot be performed, the browning becomes uneven, and the appearance is impaired.

[0022]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an invention according to claim 1 is a casing having a cooking chamber having a chamber wall as a reflection plate and having an opening at a front portion. A body, a heater disposed at least above the cooking chamber, a placement net disposed below the heater in the cooking chamber, and a transparent window glass partially having the opening. A heating cooker provided with an opening / closing door that opens and closes, wherein the heating cooker is provided with a heat shield plate that selectively covers the window glass on the cooking chamber side of the opening / closing door.

As described above, according to the first aspect of the present invention, there is provided a housing having a cooking chamber having a chamber wall as a reflection plate and having an opening at a front portion, a heater disposed at least in an upper part of the cooking chamber, In a heating cooker provided with a placement net disposed below the heater of the cooking chamber and an opening / closing door that partially has a transparent window glass and opens and closes the opening,
Since a heat shield plate for selectively covering the window glass is provided on the cooking chamber side of the opening / closing door, when the window glass is covered with the heat shield plate, heat escaping to the outside through the window glass is suppressed and cooking is performed. Good cooking can be achieved by maintaining a uniform temperature distribution in the room, and when the heat shield plate does not cover the window glass, the cooking room can be visually checked.

According to a second aspect of the present invention, there is provided a heating cooker in which the heat shield plate according to the first aspect is made of a material having substantially the same heat reflection efficiency as the reflector on the wall of the cooking chamber. It is what it was.

As described above, according to the second aspect of the present invention, the heat shield plate according to the first aspect of the present invention is made of a material having substantially the same heat reflection efficiency as the reflector on the wall of the cooking chamber. In addition to the effect of the invention described in claim 1, since the heat from the heater can be reflected on the object to be cooked,
Further, since the temperature distribution in the cooking chamber can be maintained uniformly, and the uniform browning can be provided, it is possible to perform an excellent cooking.

According to a third aspect of the present invention, there is provided a heating cooker according to the first or second aspect, wherein a gap for forming an air layer is formed between the window glass and the heat shield plate. It is.

According to the third aspect of the present invention, since a gap for forming an air layer is formed between the window glass and the heat shield plate in the first or second aspect of the invention,
In addition to the effect of the invention described in claim 1 or 2, the heat that escapes through the window glass to the outside is further suppressed, and the temperature distribution in the cooking chamber can be maintained uniform, so that more excellent cooking can be performed. It has.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. The configuration different from the above-mentioned conventional heating cooker 1 is the configuration of the opening / closing door 130, and the other configuration is the same. The description is omitted.

The door 1 for opening and closing the opening 11 of the housing 2
As shown in the figure, 30 includes a frame 131 having a rectangular window 132 formed thereon and a window glass 133 attached to the window 132 and made of transparent heat-resistant glass.

Then, the lower end of the frame 131 is connected to the opening 1.
1 is attached to an opening edge of the lower end by hinge means (not shown), and is attached to the housing 2 so as to be openable and closable about the hinge means as a rotation center. Further, a handle 134 for opening and closing operation is attached to an upper portion of the frame 131.

As shown in FIGS. 2 and 3, the frame 131 has a front wall 136 formed in a rectangular shape.
a, the peripheral side wall 1 formed on the outer peripheral edge of the front wall 136a
36b, a rear wall 137a,
An inner frame 137 is formed on the outer peripheral edge of the rear wall 137a and is formed from the peripheral wall 137b fitted inside the peripheral wall 136b.

The front wall 136a of the outer frame 136 has a rectangular window 13 in an area above the middle part in the vertical direction.
2 is formed, and an opening edge of the window hole 136c is provided with a contact edge 136d protruding toward the inner frame 137 side. Also,
A slit-shaped guide hole 136e is formed along the vertical direction at the middle part of the front wall 136a in the left-right direction.

The rear wall 137a of the inner frame 137 is formed with another window hole 137c constituting the window 132. Positioning pieces 137d and 137 projecting outward, that is, on the side of the outer frame 36, are provided on the upper edge and both side edges of the window hole 137c.
e is provided, and an L-shaped support piece 1 is provided on the lower edge.
37f are formed. This L-shaped support piece 137f
As shown in FIGS. 2 and 3, a slit-shaped guide hole 137j is formed along the left and right direction at a predetermined distance from the lower positioning protrusion 137g, and guides a heat shield plate 140 described later. Have been.

The lower edge of the window hole 137c is shown in FIG.
As shown in FIG. 3, there are provided lower positioning projections 137g formed apart from each other.
The upper positioning protrusion 137h is similarly provided on the upper edge corresponding to g.
(See FIG. 3).

Then, the positioning piece 137 of the inner frame 137 is set.
d, the window piece 133 is fitted into the positioning piece 137e and the L-shaped support piece 37f, and a heat shield plate 140, which will be described later, is disposed. Then, the peripheral wall 137b is connected to the peripheral wall 13 of the outer frame 136.
6b, the outer frame 136 and the inner frame 137 are connected by connecting means such as screws (not shown), so that the door 130 is assembled.

In the assembled state, as shown in FIG. 3, the window glass 133 surrounds the positioning pieces 137d and 137e of the inner frame 137, and the L-shaped support piece 137.
f restricts movement in the peripheral direction, and movement in the front-rear direction is restricted by the lower positioning protrusion 137g and the upper positioning protrusion 137h and the contact edge 136d of the outer frame 136. It is attached to a window 132 consisting of 136c and 137c.

When the outer frame 136 and the inner frame 137 are connected to each other, a space 138 is formed below the window 132 of the frame 131 as shown in FIG. At 138, the heat shield plate 140 is provided so as to be vertically movable through the guide hole 137j.

The heat shield plate 140 is formed in a rectangular shape to cover at least the surface of the window glass 133 attached to the window 132 on the side of the cooking chamber, and the ceiling constituting the reflector of the cooking chamber 10. It is formed of a material having substantially the same heat reflection efficiency as the wall 12, the side wall 13, and the rear wall 14, so that the heat from the heater 20, that is, the radiant heat is efficiently reflected to the cooking object in the cooking chamber 10. I can do it.

As shown in FIG. 3, a through hole 141 is formed at the lower end of the heat shield plate 140, and one end of a knob shaft 142 is attached to the through hole 141 so as to pass therethrough. . The other end of the knob shaft 142 protrudes from the guide hole 136e formed in the outer frame 136, and a knob 144 is attached to the other end of the knob shaft 142. As shown in FIG. 3, a rear wall 137 of the inner frame 137 is provided on the one end side of the knob shaft 142.
A sliding body 145 that is in sliding contact with a is attached.

In FIG. 2, the knob 144 is connected to the knob shaft 1.
Although shown as being attached to the other end of the knob 42, the knob 144 is attached to the knob shaft 142 after the other end of the knob 142 is projected from the guide hole 136e.

A receiving plate 146 that slides vertically along the inner surface of the front wall 136a of the outer frame 136 is attached to the knob shaft 142 in a loose fit state. Is one end side to the heat shield plate 140,
Also, a coil spring 147 is attached, the other end of which is in contact with the receiving plate 146 and biases the two in a direction to separate them.

When the heat shield plate 140 is disposed in the space 138 of the frame 131, the heat shield plate 14
0 is a guide hole 13 formed in the support piece 137f.
7j, and the other end of the knob shaft 142 projects outward from a guide groove 136e formed in a front wall 136a of the outer frame 136, and the knob 144 is attached to this portion. . In addition, the urging force of the coil spring 147 causes the receiving plate 146 and the sliding body 1 to move.
45 are in contact with the inner surface of the front wall 136a of the outer frame 136 and the inner surface of the rear wall 137a of the inner frame 137 in a press-contact state. By operating the knob 144 in the vertical direction, the heat shield plate 140 is moved in the vertical direction. It can be moved to.

When the knob 144 is moved to the uppermost position, the upper end of the heat shield plate 140 moves to a position substantially in contact with the positioning piece 137d as shown by a two-dot chain line in FIG. In this state, the heat shield plate 140 covers the entire surface of the window glass 133 from the inside. Also,
When the heat shield plate 140 covers the entire surface of the window glass 133, the guide holes 137j are connected to the lower positioning protrusions 137g.
, A predetermined gap G is formed between the heat shield plate 140 and the window glass 133, and the gap G allows the heat shield plate 140 and the window glass 133 to be formed between the heat shield plate 140 and the window glass 133. An air layer is formed. The heat shield effect of the air layer and the heat shield effect and the radiation effect of the heat shield plate 140 reliably prevent the temperature in the cooking chamber 10 from escaping to the outside.

When the knob 144 is lowered to the lowermost position, the lower end of the heat shield plate 140 is connected to the rear wall 13 of the inner frame 137.
The downward movement is restricted by a stopper 137k provided on the bottom surface 7a. In this state, the upper end of the heat shield plate 140 is located at a position hidden by the lower edge of the window 136c. 140 is not covered at all. In this state, the window glass 133
, The inside of the cooking chamber 10 can be visually checked, so that the cooking state of the object placed on the placement net 15 can be confirmed.

The heat shield plate 140 is connected to the receiving plate 14.
6 and the sliding body 145 move while being pressed against the inner surface of the front wall 136a of the outer frame 136 and the inner surface of the rear wall 137a of the inner frame 137, as described above. It is something like that.

Next, the operation of the cooking device 1 will be described. First, the opening / closing door 130 is opened, the object to be cooked is placed on the placing net 15 projecting forward from the opening 11, and then the opening / closing door 130 is closed. In conjunction with this closing operation, the placing net 15 described above sinks into the cooking chamber 10.

Next, the cooking conditions of the object to be cooked are set by one of the setting buttons 4a to 4c of the operation panel 3, and the cooking time is set by the operation knob 5. Next, the knob 144 is moved upward to remove the heat shield plate 1.
40 is moved upward, the window glass 133 is covered, and the start switch button 4d is operated.

By operating the start switch button 4d, the control circuit (not shown) starts energizing the heater 20, and the object is cooked. At this time, the heat from the heater 20, that is, the radiant heat is transmitted to the ceiling wall 12, the side walls 13, the rear wall 14, and the heat shielding plate 1 as a reflection plate.
The light 40 is reflected toward the object to be cooked and can be efficiently heated.

Further, since the heat radiation to the outside through the window glass 133 is prevented by the air layer of the gap G formed between the heat shield plate 140 itself and the window glass 133, the inside of the cooking chamber 10 is uniform. Temperature distribution is maintained.

In other words, the radiant heat reflected by the ceiling wall 12, the side walls 13, the rear wall 14 as the reflection plate and the heat shield plate 140 and the heat radiation to the outside through the window glass 133 are prevented, so that good cooking is achieved. What is done. Further, the surface of the object to be cooked can be made uniform brown.

When it is necessary to check the cooking status of the object to be cooked during cooking, the heat shield plate 140 is moved downward,
This can be done by visual observation through the window glass 133.

As described above, the room wall of the housing 2, that is, the ceiling wall 1
2. A cooking chamber 10 is provided with the side walls 13 and the rear wall 14 as reflectors and having an opening 11 at the front, and heaters 20 are arranged above and below the cooking chamber 10, and are located between the heaters 20. A mounting net 15 is provided, and the opening 11
The heat shield plate 140 that selectively covers the window glass 133 is provided on the side of the cooking chamber 10 of the opening and closing door 130 that partially has a transparent window glass. When covered, the window glass 133
The heat that escapes to the outside through the
This makes it possible to maintain a uniform temperature distribution within 0 and achieve good cooking.

Further, the heat shield plate 140 is made of a material having substantially the same heat reflection efficiency as the reflectors of the chamber wall, ie, the ceiling wall 12, the side walls 13, and the rear wall 14, as the reflectors of the cooking chamber 10. Therefore, the temperature distribution in the cooking chamber 10 can be maintained more uniform.

Further, since a gap G for forming an air layer is formed between the window glass 133 and the heat shield plate 140, the heat escaping to the outside through the window glass 133 is further suppressed, and the temperature distribution in the cooking chamber 10 is reduced. Can be maintained uniformly.

Moreover, in the above embodiment, since the shielding area can be adjusted according to the food,
For example, as shown by a two-dot chain line in FIG. 1, if the positioning mark M of the heat shielding plate 140 corresponding to the food is attached to the side surface of the window 136c of the outer frame 136 of the opening and closing door 130, the positioning, that is, shielding The area can be easily adjusted.

In the above embodiment, the heat shield plate 1
Although the door 40 is slid up and down into the door 130, it may be detached as necessary. However, as in the above embodiment, the open / close door 1
When slidably provided inside 30, there is an advantage that the handling is easy.

In the above-described embodiment, the heaters 20 are arranged above and below the cooking chamber 10, but they may be arranged only above.

[0058]

As described above, according to the first aspect of the present invention, a casing having a cooking chamber having a chamber wall as a reflection plate and having an opening at a front portion, and being disposed at least above the cooking chamber. In a heating cooker provided with a heater, a placement net disposed below the heater in the cooking chamber, and an opening / closing door that partially has a transparent window glass and opens and closes the opening, Since the heat shield plate that selectively covers the window glass is provided on the cooking room side of the opening / closing door, when the window glass is covered with the heat shield plate, the heat that escapes to the outside through the window glass is suppressed, and Has an effect that the cooking temperature can be kept uniform and good cooking can be performed, and when the window glass is not covered with the heat shield plate, the cooking chamber can be visually confirmed.

According to a second aspect of the present invention, the heat shield plate according to the first aspect of the present invention is made of a material having substantially the same heat reflection efficiency as the reflector on the wall of the cooking chamber. In addition to the effect of the first aspect of the present invention, the heat from the heater can be reflected on the object to be cooked, so that the temperature distribution in the cooking chamber can be maintained uniformly and a uniform brown spot can be provided. This has the effect that good cooking can be achieved.

According to a third aspect of the present invention, in the first or second aspect, a gap for forming an air layer is formed between the window glass and the heat shield plate. Or, in addition to the effect of the invention described in claim 2, there is an effect that it is possible to further suppress the heat escaping to the outside through the window glass and maintain a uniform temperature distribution in the cooking chamber, so that better cooking can be performed. It is.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cooking device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an opening / closing door of the cooking device.

FIG. 3 is a cross-sectional view of the opening / closing door of the heating cooker (a cross-sectional view taken along line XX in FIG. 1).

FIG. 4 is a perspective view of a conventional heating cooker.

FIG. 5 is an exploded perspective view of the opening and closing door of the conventional heating cooker.

FIG. 6 is a sectional view of the opening / closing door of the conventional cooking device (FIG. 4).
Cross-sectional view taken along line YY in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating cooker 2 Housing 10 Cooking room 11 Opening of cooking room 12 Ceiling wall (part of peripheral wall of cooking room) 13 Side wall (part of peripheral wall of cooking room) 14 Rear wall (part of peripheral wall of cooking room) 15 Placement net 20 Heater 130 Opening / closing door 133 Window glass 140 Heat shield plate

Claims (3)

[Claims] 1. A housing having a cooking chamber having a chamber wall as a reflection plate and having an opening at a front portion, a heater disposed at least in an upper portion of the cooking chamber, and a heater disposed below the heater in the cooking chamber. In a heating cooker provided with a placement net disposed and a partly transparent window glass and an opening / closing door for opening and closing the opening, the window glass is selected on the cooking chamber side of the opening / closing door. A cooking device characterized in that a heat shield plate is provided for covering. 2. The heat shield plate according to claim 1,
A heating cooker comprising a material having substantially the same heat reflection efficiency as a reflection plate on a wall of a cooking chamber. 3. A cooking device according to claim 1, wherein a gap for forming an air layer is formed between the window glass and the heat shield plate.