JP3236436B2 - Roaster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roaster for controlling the temperature in a cooking chamber.

[0002]

2. Description of the Related Art In recent years, with the development of electric products, a large number of electric roasters have been produced. Also,
Many products that incorporate roasters in various types of cooking devices have come to appear.

[0003] However, at present, there has not been much research on a roaster using a temperature control function by utilizing an electric feature.

Hereinafter, a conventional roaster will be described.
FIG. 5 is a sectional view of a conventional roaster. In FIG.
Reference numeral 1 denotes a roaster main body (hereinafter abbreviated as main body), which has a cooking chamber 2 therein, and a door 3 attached to an entrance of the cooking chamber 2. The heater 4 is fixed to an upper part in the cooking chamber 2, and a chimney 5 is provided on a surface opposite to an entrance of the cooking chamber 2. 6
Is a saucer on which foods are placed. Reference numeral 7 denotes a heat shield box, which covers the outside of the cooking chamber 2, and a temperature-sensitive operation switch 8 is attached to a rear surface of the heat shield box 7. The switch 8 for temperature sensing operation and the heater 4 are connected to a power supply in series via an electrical connection line 9.

[0005] The operation of the above configuration will be described. In the cooking operation, first, the door 3 is opened, the food such as fish is placed on the tray 6 and put into the cooking chamber 2, and then a switch (not shown) of the operation unit is provided. The heater 4 is energized by. Cooking can be performed by this operation. However, if the heater 4 is kept energized while the food is being inserted, the heater 4 may be abnormally heated and the food may be ignited. In order to prevent such abnormal heating, the temperature-sensitive switch 8 is operated at a certain temperature or higher, and the power supply to the heater 4 is stopped. The cooking chamber 2 is covered with a heat shield box 7 so that the inside of the main body 1 does not become hot even in the case of such an abnormality.

[0006]

However, in the above configuration, since the switch 8 for the temperature sensing operation is merely operated at a certain temperature or higher, it is not safer against abnormal heating. In addition, it is insufficient to appropriately control the temperature in cooking and prevent overheating. Further, the heat insulation structure when the roaster is combined with another heating cooker to form a composite cooker is also insufficient.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and provides a roaster in which cooking performance such as prevention of overheating is improved by appropriate temperature control, and heat exhausted from a main body is suppressed. This is the first purpose.

[0008] A second object is to reduce the cooking performance without impairing the cooking performance.
An object of the present invention is to provide a roaster with improved safety against abnormal heating.

[0009]

In order to achieve the first object, a roaster according to the present invention is provided in a roaster body .
A cooking chamber which is attached to the inlet of the front face of the cooking chamber
Doors and a heater for heating the food disposed in the cooking chamber, et al provided in the rear wall opposite the inlet of the cooking chamber
It is a chimney for exhausting cooking outdoors to smoke generated from the food
On the outside of the rear wall of the cooking chamber or near the chimney.
And a temperature sensor kicked, and electrically connecting the temperature sensor and the driving circuit, and to control the energization of the heater temperature of the temperature sensor via the drive circuit becomes a predetermined value This is a first problem solving means.

In order to achieve the second object, a switch for temperature-sensitive operation is provided in the main body, and the switch for temperature-sensitive operation is connected in series between an electric connection between a drive circuit and a heater, The temperature of the cooking chamber when the switch of the temperature-sensitive operation is operated to stop energizing the heater is set to a value higher than the temperature of the cooking chamber when the energizing of the heater is controlled by the temperature sensor. This is the second problem solving means.

[0011]

According to the present invention, when the temperature in the cooking chamber reaches a substantially predetermined value, the temperature sensor attached to the rear wall senses the first solution and controls the power supply from the drive circuit to the heater. . At this time, if the temperature of the heater is directly received by the temperature sensor as in the related art, control is performed so as to keep the amount of heat of the heater constant regardless of the size of the food. Will decrease. However, in the present invention, since the temperature sensor is attached to the rear wall portion of the cooking chamber which affects when smoke and water vapor generated from the cooking product are discharged through the chimney, the size sensor is adapted to the size of the cooking product. This changes the state of energization of the heater. That is, when the food is large, a large amount of water vapor is generated during heating, and the temperature of the rear wall surface of the cooking chamber is suppressed from rising. As a result, the time for energizing the heater can be increased, thereby improving the cooking performance. it can. Conversely, when the food is sufficiently scorched or when there is no food, the temperature of the rear wall surface of the cooking chamber tends to rise, and as a result, the time for energizing the heater is reduced. In addition, since these actions keep the heating of the cooking chamber at an appropriate amount, excess heat exhausted from the main body is suppressed.

Further, according to the second solving means, the temperature of the cooking chamber when the power supply to the heater is stopped by operating the switch of the temperature sensing operation, and the temperature of the cooking chamber when the power supply to the heater is stopped by the temperature sensor. Because the temperature is set to a higher value, the temperature-sensitive switch does not work before the temperature sensor, and the drive circuit uses a temperature sensor that can set the difference between the temperature at which power is turned off and the temperature at which power is turned on. Can be heated without impairing the cooking performance. Further, when the temperature sensor breaks down, the switch for the temperature sensing operation operates to stop the abnormal heating, thereby improving safety.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described with reference to FIG.

FIG. 1 is a sectional view of a roaster unit according to an embodiment, FIG. 2 is a perspective view of the same, FIG. 3 is a sectional view of the same, and FIG. 4 is a block diagram showing the same control. In FIG. 1, reference numeral 10 denotes a roaster main body (hereinafter abbreviated as a main body) incorporated in kitchen furniture or the like, which has a cooking chamber 11 with an enameled surface inside, and a door 12 attached to an entrance of the cooking chamber 11. . A heater 13 is fixed to an upper portion of the cooking chamber 11, and a chimney 14 for discharging steam or smoke generated during cooking in the cooking chamber 11 to the outside is provided on a rear wall surface 11 a opposite to the entrance of the cooking chamber 11.
Is provided toward the upper rear. A temperature sensor 15 is provided on the rear wall surface 11a of the cooking chamber 11. As shown in FIG. 2, the temperature sensor 15 holds a thermistor (not shown) covered with an insulating tube 15b by a metal plate 15a of aluminum or the like. Drill a hole 16 as shown in
A screw portion 17 is formed on a mounting flange 14 a provided on the chimney 14 and fixed by screws 18. Then, as shown in FIG. 4, the temperature sensor 15 is electrically connected to the drive circuit 19. In addition, 20 is a saucer on which foods and the like are placed.

The outside of the cooking chamber 11 is covered with a heat shield box 21, and a switch 22 having a large on-off width and having a large on / off width is attached to the rear surface of the heat shield box 21. The switch 22 and the heater 13 for the temperature sensing operation are connected in series to a power source via an electrical connection line 23 as shown in FIG. Here, when the temperature of the temperature sensor 15 reaches a predetermined value, the drive circuit 19 has a function of controlling the energization of the heater 13, and the switch 22 for the temperature sensing operation operates to energize the heater 13. The temperature of the cooking chamber at the time of stopping the cooking
3 is set to a value higher than the cooking chamber temperature when controlling the energization of the cooking chamber.

An upper body 24 has a plate 25 on the upper surface and an induction heating section 26 inside. Reference numeral 27 denotes a heating coil, which is electrically connected to the control circuit unit 28 to form an induction heating unit 26. Reference numeral 29 denotes a kitchen furniture main body, which holds the main body 10 and the upper main body 24 described above.

The operation of the roaster configured as described above will be described below. As the cooking operation, door 1
2 is opened, the food such as fish is placed in the cooking chamber 11 on the receiving tray 20, and the heater 1 is turned on by a switch (not shown) of the operation unit.
The cooking progresses by energizing 3. If the heater 13 is kept energized while the food is being put, the food will be in a state of being sufficiently burnt. However, in such a case, the temperature of the rear wall surface 11a of the cooking chamber 11 increases, and the temperature sensor 1
When 5 reaches a predetermined temperature, the power supply from the drive circuit 19 to the heater 13 is stopped. At the same time, when the temperature sensor 15 drops to a certain temperature, the power supply from the drive circuit 19 to the heater 13 is restarted, and such an on / off action suppresses overheating by cooking the food in a predetermined manner.

As described above, the temperature sensor 15 is provided on the rear wall surface 11a of the cooking chamber 11 to control the temperature of the rear wall surface 11a so as not to directly receive the radiant heat of the heater 13. Decompression degree etc.)
It works in accordance with the size and size, thereby improving cooking performance and safety. That is, when there is no cooking material, the temperature rise of the rear wall surface 11a by the heater 13 becomes faster and the power supply to the heater 13 decreases, and when the cooking material is large, the power supply to the heater 13 increases and the food is heated sufficiently.

In this embodiment, the temperature sensor 15 is connected to the rear wall 1.
Since it is provided in the vicinity of the chimney 14a, when the steam or the like generated from the cooked food is discharged from the chimney 14, the temperature rise of the temperature sensor 15 is suppressed. At this time, the degree of the suppression is affected by the size of the cooked food, and the larger the cooked food, the more steam is generated during heating. Therefore, the rise in the temperature of the temperature sensor 15 is suppressed.
3, the energization time will be increased. In this embodiment, the temperature sensor 15 is fixed by the mounting flange 14 of the chimney 14.
This is achieved by forming a female thread portion 17 in the a and tightening a screw 18 therein. With this configuration, regardless of the conventional problem that the female thread is cut off at the place where the enamel is processed, the temperature sensor 15 is removed. Can be directly attached to the enameled cooking chamber 11.

Further, the temperature of the cooking chamber at the time when the switch 22 for the temperature sensing operation is operated to stop energizing the heater 13 is set as follows.
By setting the temperature to a value higher than the temperature in the cooking chamber when the power supply to the heater 13 is controlled by the temperature sensor 15, the cooking system does not operate prior to the control system of the temperature sensor 15 and the drive circuit 19, so that the cooking performance is improved. Nothing worse. Conversely, even if the temperature sensor 15 or the like breaks down, an abnormal temperature rise in the cooking chamber 11 can be sensed by the switch 24 of the temperature sensing operation by the bimetal, and the energization of the heater 13 can be stopped mechanically. Safety can be sufficiently ensured. Further, the cooking performance can be further improved by reducing the difference between the temperature at which the heater 13 is turned off and the temperature at which the heater 13 returns, by reducing the on / off difference of the temperature sensor 15.

Further, because of the temperature control by the temperature sensor 15, the heat exhausted from the roaster can be reduced as a result, and the control circuit unit 28 having poor heat resistance is provided above the roaster as in this embodiment. Induction heating unit 26 provided
And a roaster can be easily provided in a composite heating cooker such as kitchen furniture.

In this embodiment, the switch 2 for the temperature sensing operation is used.
Although a bimetal type was used for 2, it goes without saying that a thermal fuse or the like may be used.

[0023]

As is apparent from the above description, according to the present invention, a temperature sensor is provided on the rear wall of the cooking chamber, and when the temperature of the temperature sensor reaches a predetermined temperature, the energization of the heater is controlled. Accordingly, it is possible to provide a roaster in which cooking performance such as prevention of overbaking by appropriate temperature control is improved, and heat exhausted from the main body is suppressed.

Further, by providing a temperature-sensitive operation switch operating at a temperature higher than that of the temperature sensor in the main body, a roaster having improved safety against abnormal heating without impairing cooking performance is provided. be able to.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a roaster unit in which a roaster according to an embodiment of the present invention is incorporated in kitchen furniture.

FIG. 2 is a perspective view of an essential part of the roaster.

FIG. 3 is a sectional view of an essential part of the roaster.

FIG. 4 is a block diagram showing control of the roaster.

FIG. 5 is a sectional view of a conventional roaster.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roaster main body 11 Cooking room 11a Rear wall surface 12 Door 13 Heater 14 Chimney 15 Temperature sensor 19 Drive circuit 22 Switch for temperature sensing operation 23 Electrical connection line

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shunichi Nakazawa 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-company (56) References JP-A-4-184012 (JP, A) JP-A-5-172343 (JP, A) JP-A-4-60145 (JP, U) JP-A-5-90208 (JP, U) ) Japanese Utility Model Showa 50-108989 (JP, U) Japanese Utility Model Showa 50-72110 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24C 7/04 A47J 37/06 301

Claims (2)

(57) [Claims] And 1. A cooking chamber provided in the roaster body, a door attached to the inlet of the front surface of the cooking chamber, a heater for heating the food disposed in the cooking chamber, an inlet of the cooking chamber a chimney that the smoke generated from the food provided at the rear wall of the side opposite to the exhaust cooking outdoors and, of the cooking chamber
And a temperature sensor provided on the outer surface or chimney near the back wall, and electrically connecting the temperature sensor and the driving circuit, the temperature of the temperature sensor via the drive circuit becomes a predetermined value the heater Roaster that controls the power supply to 2. A switch for temperature-sensitive operation is provided in a roaster body, and the switch for temperature-sensitive operation is connected in series between an electric connection line between a drive circuit and a heater, and the switch for temperature-sensitive operation is operated. 2. The roaster according to claim 1, wherein the temperature in the cooking chamber when the power supply to the heater is stopped is set to a value higher than the temperature in the cooking chamber when the power supply to the heater is controlled by the temperature sensor.