JPH0849858A - Electric heating oven - Google Patents

Abstract

PURPOSE:To scorch the surface in a comparatively short time, shorten a start up time wherein a material to be baked becomes substantially a state of baking, in an electric heating oven to store the material in a heater room for baking. CONSTITUTION:A first heater room 2a on a bottom wall section 11 of a heating room 1, and a second heater room 2b on an upper wall section 12, are formed. A boundary wall between the first and second heater rooms 2a, 2b, is composed by a luminescent heat proof glass plate 13. High temperature light emission heaters H, H such as a halogen lamp or a quartz heater and the like are accommodated in the first, and the second heater room. A reflection plate 21 is set on a wall face of an opposite side to the heating room 1 in the first, and the second heater room 2a, 2b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heating type oven, and more particularly to an electric heating type oven in which a material to be fired can be sufficiently browned.

[0002]

2. Description of the Related Art As an oven of this kind,
As disclosed in Japanese Utility Model Publication No. 55-116906,
There is known a type in which an electric heater is provided in an upper surface wall and a rear constituent wall of a substantially sealed heating chamber closed by a front door, and air in the heating chamber is agitated by forced circulation in the rear constituent wall. There is. In this case, since the boundary film generated on the surface of the object to be baked contained in the heating chamber is peeled off by the forced circulation air flow, the baking can be done in a relatively short time and a certain degree of browning occurs. easy.

However, in this conventional device, a constant time (rise time) is required until the substantial heating (heat transfer to the object to be fired) for baking the object to be fired is started.
Is required. This is because it takes a predetermined time for the electric heater to reach a sufficient heat generation state, and even if the electric heater is in a sufficient heat generation state, the heating chamber of the oven cannot be heated to a predetermined temperature. As long as the material to be fired does not sufficiently transfer heat from the circulating hot air, it takes time for this.

The present invention has been made in view of the above points, and is a state in which an object to be fired can be substantially fired in an "electrothermal oven in which the object to be fired is housed in a heating chamber and fired". It is an object of the present invention to shorten the rising time until it becomes so that it can be browned in a relatively short time. [Invention of Claim 1]

[0005]

[Technical Means] A technical means of the present invention for solving the above-mentioned problem is to "install a first heater chamber (2) on a bottom wall (11) of a heating chamber (1).
a) is provided with a second heater chamber (2b) on an upper wall portion (12), and a boundary wall between these first and second heater chambers (2a) and (2b) has a heat-resistant glass plate (13) having light transmittance And a high temperature light emitting heater (H) such as a halogen lamp heater or a quartz heater is housed in each of the first and second heater chambers (2a) and (2b).
The reflection plate (21) is provided on the wall surface of the heater chamber (2a) (2b) opposite to the heating chamber (1). "

[0006]

The above technical means operates as follows. Heating chamber
(1) When the material to be fired is placed in the high temperature light emitting heater (H) and the high temperature light emitting heater (H) emits light, the high temperature light emitting heater (H) emits light and passes through the heat resistant glass plate (13), and the high temperature light beam is immediately emitted to the heating chamber. (1) Reach within. Then, the high-temperature rays burn the object to be fired. It should be noted that high-temperature light rays traveling from the high-temperature light emitting heater (H) to the opposite side of the heating chamber (1) are also reflected by the reflecting plate (21) and reach the heating chamber (1).

Further, high temperature light rays from the high temperature light emitting heater (H) in one of the first and second heater chambers (2a) and (2b) are heat resistant glass plates.
Although it passes through (13) and reaches the heater chamber on the opposite side, this high-temperature ray is also reflected by the reflection plate (21) and returns to the inside of the heating chamber (1). Then, by baking with this high-temperature light beam, for example, in the case of steak, the surface is baked relatively early and becomes brown, and the inside is baked by the subsequent heating with a high-temperature light beam, and it is baked moderately without letting the meat juice escape. To be done.

Further, even when the dish such as pizza is used only for browning, the browning tends to occur, and the problem of excessive baking to the inside of the pizza hardly occurs. When the high temperature heater (H) is turned off after the completion of firing, the heat capacity of the heater itself is small, so that the residual heat is small and the temperature inside the heating chamber rapidly drops.

[0009]

[Effect] When the high-temperature light emitting heater (H) is turned on, the firing of the object to be fired immediately starts, so that the rise time is almost unnecessary. Moreover, since the surface of the object to be baked is quickly baked, when the product is baked such as steak, the broth of the object to be baked does not flow out excessively.

Further, when the main purpose is to brown the surface without excessively burning the inside of the object to be burned, as in the case of browning the surface of pizza,
It is especially easy to use. High-temperature heating heater (H) Since the heat capacity of the heater itself is small, there is little residual heat, and when heating is stopped after cooking is complete, the temperature inside the heating chamber rapidly drops, preventing excessive cooking progress due to residual heat after the heater stops heating. it can.

[Invention of Claim 2] In addition to the invention of Claim 1, the present invention provides a high temperature light emitting heater (H) (H) housed in the first and second heater chambers (2a) (2b). The technical means adopted for this purpose is to improve the durability of the heater in the space (20) communicating with the first and second heater chambers (2a) (2b). An exhaust fan (3a) is installed, and the empty space (2
0) communicates with the outside, and the first and second heater chambers (2a)
(2b) is provided with a suction port (22) on the opposite side to the vacant chamber (20) '.

As a result, during the firing operation, the suction port is
Since the air flow from (22) to the outside through the empty chamber (20) is generated, the first and second heater chambers (2a) and (2b) are not heated, and the high temperature light emitting heater (H ) Durability is improved. [Invention of Claim 3] In the invention of Claim 1, the invention is intended to enhance the firing efficiency by agitating the air in the heating chamber (1), and is adopted for this purpose. The means to be done is to "provide a stirring fan (14) on the rear surface of the heating chamber (1)".

In this case, since the inside is agitated by driving the agitating fan (14), the surface of the object to be fired is heated by the high temperature light from the high temperature light emitting heater (H). Since the boundary film of is removed by peeling, the firing efficiency is further improved. The stirring fan (14) and the exhaust blower fan may be rotationally driven by a common drive source. In this case, improvement in firing efficiency and the high temperature light emitting heater (H) (H ) Only one drive source is required to improve durability by preventing overheating.

[0014]

Embodiments of the present invention described above will now be described in detail with reference to the drawings. Example 1 shown in FIGS. 1 and 2 is a heating chamber.
(1) Disk-shaped mesh plate unit on which the material to be fired (N) is placed
(41) Rotatable, high temperature light emitting heater (H) (H)
Both the first and second heater chambers (2a) and (2b) that accommodate the above can be air-cooled.

The heating chamber (1) is formed in a box-shaped casing (K) with an open front, and the front open end of the heating chamber (1) is closed by a front door (15) which opens and closes with its lower end as a fulcrum. Has been done. The bottom wall (1) of the heating chamber (1) in the casing (K)
The first heater chamber (2a) is formed in 1), the second heater chamber (2b) is formed in the upper wall part (12), and the empty chamber (20) is formed in the rear wall part.
These three rooms are in communication with each other.

The first and second heater chambers (2a) and (2b) are provided with a large number of high temperature light emitting heaters (H) extending in the left-right direction.
The lower surface of the first heater chamber (2a) and the respective reflection plates (21) provided on the upper surface of the second heater chamber (2b) are arranged at a constant interval,
It is supported by the reflector (21). For this reason, the respective reflection plates (21) are provided with supporting portions (23) (23) for partially supporting the respective high temperature light emitting heaters (H).

An exhaust passage (24) which extends upward and communicates with the outside is formed in the vacant chamber (20), and a third motor (M ₃ ) is connected from the lower end of the exhaust passage (24) toward the vacant chamber (20). ), An exhaust fan (3a) is provided. Further, suction ports (22) and (22) are formed in the front opposite parts of the first and second heater chambers (2a) and (2b). Therefore, when the exhaust fan (3a) is rotated, the pressure difference between the suction port (22) and the suction side of the exhaust fan (3a) causes the first and second heater chambers () from the suction port (22). 2a) (2
An airflow that reaches the outside from the vacant chamber (20) via the exhaust passage (24) via b) is generated.

The first and second heater chambers (2a) (2b) and the heating chamber
The boundary wall surface with (1) is a heat-resistant glass plate (13) having a light-transmitting property, and in this embodiment, transparent heat-resistant glass is adopted. The first and second heater chambers (2a) and (2b) are formed over substantially the entire lower surface constituting wall and the upper surface constituting wall of the heating chamber (1). The entire upper surface is composed of the heat resistant glass plate (13).

The mesh plate unit (41) is a disk-shaped mesh body (41a).
And an annular frame (41b) for detachably accommodating the same, and is rotatably supported by a rectangular frame (4) for accommodating the annular frame (41b) in an inscribed state. For this reason,
Support rollers (42) inward from the center of each of the rectangular frame bodies (4)
The net plate unit (41) is supported by the upper edge of the body portion of each support roller (42) by projecting the (42). The annular frame (41b) is
A skirt portion hangs down on the inner peripheral side of the annular flat surface portion, and an annular upright plate is continuously provided on the outer peripheral side thereof, and the annular flat surface contacts the supporting roller (42). The inner skirt has an annular frame (4
Exhibits the guiding function when turning in 1b).

A pair of guide rails (16) and (16) for positioning the insertion position of the rectangular frame body (4) are provided on the heat-resistant glass plate (13) serving as an upper partition wall of the first heater chamber (2a). Provided,
A rectangular frame body (4) equipped with a mesh plate unit (41) can slide forward and backward along these guide rails (16) (16). For this reason, a pair of traveling wheels (43) (43) are projected to the outside on both sides of the rectangular frame (4), and these have inner flanges inside the guide rails (16) (16). Is supported by the guide rails (16), (16).
A gear (42a) coaxially and integrally connected to the support roller (42) projects on the outer surface of the right side of the rectangular frame (4) in FIG. It is configured to mesh with a gear (42b) provided on the output shaft of the first drive motor (M ₁ ) in the control box (B) provided on one side. The center of the gear (42b) is located obliquely rearward and upward with respect to the gear (42a) as shown in FIGS. Therefore, when the rectangular frame body (4) is pulled out forward, it deviates from the meshing relationship, and when it is pushed into a predetermined position in the heating chamber (1), the meshing relationship is restored.

The supporting roller (42) and a gear integrated with the supporting roller (42)
(42a) Furthermore, the traveling wheels (43), (43) are rotatably supported by a fixed shaft (44), and the fixed shaft (44) and the tip of the fixed shaft (44) are on the right side guide. It projects outside the rail (16). Then, as shown in FIG. 4, the protruding height is set above the guide rail (16), and the rack (45) for connecting the protruding protrusion is parallel to the guide rail (16). It is installed. This rack has teeth on the upper surface, and a gear (46) provided on the output shaft of the second drive motor (M ₂ ) incorporated in the control box (B) meshes with this.

The arrangement portion of the second drive motor (M ₂ ) is set near the open end of the heating chamber (1), and the gear provided on the output shaft of the second driving motor (M ₂ ) is housed in the heating chamber (1). And the front end of the rack (45) in the rectangular frame (4). Therefore, the positive rotation of the second drive motor (M ₂ ) causes the rectangular frame (4) to move to the heating chamber.
(1) It projects forward from the inside and returns to the inside of the heating chamber (1) by the reverse rotation of the second drive motor (M ₂ ).

In this embodiment, the rectangular frame body (4) is projected forward with the front door (15) opened and in a horizontal posture. Therefore, the front door (15)
In the open position, as shown in FIG. 7, an opening / closing mechanism is adopted such that the inner surface of the front door (15) has a height substantially matching the bottom surface of the heating chamber (1), and the inner surface has In the open state, a pair of auxiliary rails (17) (17) continuous with a pair of guide rails (16) (16) provided at the bottom of the heating chamber (1) are provided. Therefore, the rectangular frame that escaped from the heating chamber (1)
The traveling wheels (43) and (43) of (4) are transferred from the guide rails (16) and (16) to the auxiliary rails (17) and (17).

In the embodiment having the above-mentioned structure, the object to be fired (N) is placed on the net plate unit (41) with the rectangular frame (4) accommodated in the heating chamber (1), To the operating state.
Then, since the high temperature light emitting heaters (H) and (H) are constituted by halogen lamp heaters or quartz heaters, the boundary wall between the heating chamber (1) and the first heater chamber (2a) and the second heater chamber (2a)
Through the heat-resistant glass plate (13) on the boundary wall with the heater chamber (2b),
High temperature light rays of the high temperature light emitting heater (H) (H) and a reflector thereof
The reflected light from (21) reaches the object to be fired (N). Also,
With the start of this operation, it quickly becomes a predetermined heat generation state,
The object to be fired (N) placed on the net plate unit (41) is fired. At the same time, the first drive motor (M ₁ ) is in an operating state, and the material to be fired (N) is rotated together with the net plate unit (41), so that the material to be fired (N) is evenly fired. .

Since the mesh plate unit (41) has a structure in which the mesh body (41a) is housed in the annular frame (41b), the high temperature light rays are not blocked by the mesh plate unit (41). Absent. Further, in this firing process, since the firing by the high temperature light from the high temperature light emitting heater (H) (H) is performed, the object to be fired (N)
The surface portion of is rapidly baked, and the surface of the object to be baked (N) is likely to be charred.

On the other hand, since the high temperature light emitting heaters (H) (H) immediately rise and the surface temperature of the high temperature light emitting heaters (H) (H) becomes high, the first and second heater chambers (2a) Although the temperature inside (2b) is high, the third motor (M ₃ ) will start at the same time when the operation starts.
Is started, the exhaust fan (3a) is driven, and the suction port
From (22) through the first and second heater chambers (2a) and (2b), the vacant chamber (20)
Is discharged to the outside through the exhaust passage (24). Therefore, the insides of the first and second heater chambers (2a) and (2b) are air-cooled, and the disadvantage that the high temperature light emitting heaters (H) and (H) become excessively high in temperature is eliminated.

In the baking with the high-temperature light emitting heaters (H) and (H), the surface is baked quickly, so that in a baked product such as steak, the baking proceeds in a state in which the broth is unlikely to leak to the outside. Etc. are baked well. Further, in the case of pizza or the like, the browning of the surface can be performed in a very short time.

When the above firing is completed, the operation of the instrument is stopped automatically or by a manual operation, and the high temperature light emitting heater
(H) (H) becomes non-conducting. In this embodiment, the third motor (M
₃ ) is not stopped even if the equipment is stopped, and the front door (1
It will be stopped in conjunction with the release of 5). For this reason, a switch that interlocks with the opening and closing of the front door (15) and opens when the front door (15) is opened.
(19) is inserted in the electric circuit to the third motor (M ₃ ).
Therefore, when the front door (15) is opened to take out the object to be fired (N), the third motor (M ₃ ) stops and the exhaust fan (3a)
The hot air discharge operation due to is stopped.

Therefore, the air-cooling action of the exhaust fan (3a) is not stopped only by turning off the high temperature light emitting heaters (H) (H) to stop the heating, and the overheating of these heaters is surely prevented. When the front door (15) is opened, its inner surface faces upward and the auxiliary rails (17) (17) mounted on this surface are linearly aligned with the guide rails (16) (16) on the bottom of the heating chamber (1). Continuous.

When the second drive motor (M ₂ ) is driven positively in this state, the rectangular frame (4) escapes from the heating chamber (1) due to the engagement of the gear (46) and the rack (45). Project to. At this time, the traveling wheels provided on both sides of the rectangular frame (4)
(43) (43) from guide rail (16) (16) to auxiliary rail (17) (1
Since it rolls along 7), the rectangular frame (4) can be smoothly taken out above the front door (15). Then, when the rotation amount of the second drive motor (M ₂ ) reaches the set value, it is stopped, so that when the predetermined position of the front door (15) is reached, the heating chamber (1) of the rectangular frame body (4) is The escape movement from () is stopped, and most of the rectangular frame (4) escapes from the heating chamber (1). In this state, the article to be fired (N) placed on the net plate unit (41) is taken out.

When a new object to be fired (N) is placed on the net plate unit (41) of the rectangular frame body (4) in the escaped state and the second drive motor (M ₂ ) is driven in reverse, By the procedure reverse to the above, the rectangular frame (4) returns to the initial position in the heating chamber (1) and stops,
When the front door (15) is closed and firing operation is performed, the above firing is executed. In this embodiment, since the material to be fired (N) being fired is rotated by the first drive motor (M ₁ ), uneven firing is unlikely to occur. Also, the second drive motor (M ₂ )
Driven by, the rectangular frame (4) on which the material to be fired (N) is placed
Can be put in and taken out from the heating chamber (1) on the upper surface of the front door (15) in an open state, so that the heating chamber (1) can be put in and out of the object to be baked (N).
You don't have to worry about getting burned by touching the wall.

The rectangular frame (4) is attached to the second drive motor (M
_In order to accurately reciprocate between the loading position in the heating chamber (1) and the removal position on the upper surface of the open front door (15) by driving ₂ ), the second drive motor is operated by operating the operation switch. A device for rotating (M ₂ ) forward or backward by a predetermined angle may be adopted. Since the linear movement amount of the rack (45) is determined according to the rotation angle of the gear (46), for example, a control device as shown in FIG. 8 can be adopted.

By the take-out operation switch (71), the second
When the drive motor (M ₂ ) is driven to rotate normally and the output of the rotation angle detection means (72) reaches a set value, the first comparison means (73) which outputs a stop signal, and the closing operation switch (74) The second drive motor (M ₂ ) is reversely driven by the second drive motor and outputs a stop signal when the rotation angle of the second drive motor (M ₂ ) reaches a set value.
The configuration of providing (75) is adopted.

As a result, the take-out operation switch (7
1) and a rectangular frame by operating the closing operation switch (74)
(4) can be taken in and out, and the take-out position and the take-in position are preset. It goes without saying that the take-out position is set at a position where the rack (45) cannot be disengaged from the gear (46). At the loading position of the rectangular frame (4), the gear (42a) meshes with the gear (42b), but since the gear (42b) is located above and behind the gear (42a), When the frame body (4) is returned to the throw-in position and is ejected forward therefrom, the meshing of the two gears does not interfere.

As shown by the phantom line in FIG. 1, the stirring fan (14) driven by the third motor (M ₃ ) is installed in the heating chamber.
When it is provided in (1), the air in the heating chamber (1) is agitated by the agitating fan (14) during the firing operation, and the air is burned on the surface of the article to be fired (N) during firing. Since the generated boundary is separated by the stirring air flow, the firing efficiency is further improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a front view of a partial cutout.

FIG. 3 is a plan view of the bottom of the heating chamber (1)

FIG. 4 is a sectional view taken along line XX.

FIG. 5 is a sectional view taken along line YY.

FIG. 6 is a diagram showing the relationship between the gear (42a) and the gear (42b).

[Fig. 7] Relationship between the guide rail (16) and the auxiliary rail (17) with the front door (15) opened.

FIG. 8 is an explanatory diagram of an operation circuit for loading and unloading the rectangular frame body (4).

[Explanation of symbols]

 (1) ・ ・ ・ Heating chamber (11) ・ ・ ・ Bottom wall (2a) ・ ・ ・ First heater chamber (12) ・ ・ ・ Top wall (2b) ・ ・ ・ Second heater chamber (13) ・..Heat-resistant glass plate (H) ... High-temperature light-emitting heater (21) ... Reflector plate

Claims (4)

[Claims] 1. An electrothermal oven in which an object to be fired is housed in a heating chamber and fired, and a first heater chamber (2a) is provided on a bottom wall portion (11) of the heating chamber (1). 12) Second heater chamber
(2b) is provided, and the boundary wall between the first and second heater chambers (2a) and (2b) is constituted by a heat-resistant glass plate (13) having light transparency, and the first and second heater chambers (2a) ) (2b) accommodates a high temperature light emitting heater (H) such as a halogen lamp heater or a quartz heater, and the heating chambers in the first and second heater chambers (2a) and (2b)
An electrothermal oven with a reflector (21) on the wall opposite (1). 2. An exhaust fan (3a) is provided in an empty chamber (20) communicating with the first and second heater chambers (2a) (2b), and the empty chamber (2) is provided.
0) communicates with the outside, and the first and second heater chambers (2a)
The electric heating oven according to claim 1, wherein the suction port (22) is provided on the opposite side of the empty chamber (20) in the (2b). 3. The electric heating oven according to claim 1, wherein a stirring fan (14) is provided on the rear surface of the heating chamber (1). 4. A front door for closing the front opening of the heating chamber (1)
The electrothermal oven according to claim 2, further comprising exhaust fan control means for stopping the drive source of the exhaust fan (3a) by the output from the means for detecting the opening of (15).