JP2528422Y2 - Roaster - Google Patents

Description

[Detailed description of the invention]

[Purpose of the invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roaster using a heater as a heating source, wherein a heater wire is covered by a tube such as a glass tube and emits heat while emitting light through the tube.

[0003]

2. Description of the Related Art Conventionally, as a heater used as a heating source in a roaster, a sheathed heater in which a heater wire is covered with a metal protective tube is generally used.

[0004]

However, the sheathed heater has a drawback that the heat is hard to be radiated and the start-up performance is inferior. In addition, since the sheathed heater is relatively dark even in a red-hot state, the roasting chamber is required only by the heater. There was a problem that the state inside was difficult to see from the outside.

In view of this, instead of the sheathed heater, it has been considered to use a heater in which a heater wire is covered with a tube such as a glass tube and emits heat while emitting light through the tube. Such a heater is used. Thereby, the above-mentioned disadvantage can be solved.

However, when this type of heater is used,
When the heater tube is damaged and the heater wire is exposed, it is conceivable that the user opens the door of the roasting chamber and accidentally touches the heater wire to cause an electric shock.

Therefore, an object of the present invention is to improve the safety in a heater in which a heater wire is covered by a tube such as a glass tube as a heating source and emits heat while emitting light through the tube. It is an object of the present invention to provide a roaster that can be used and improved in convenience.

[Structure of the invention]

[0009]

The roaster of the present invention is provided with a
Roast room for cooking foods and
The heater wire is installed in a state where
A tube that emits light and emits heat through its tube
Heater, a door for opening and closing the roast chamber, and a heater.
Between one terminal and one terminal of the AC power supply and the heater.
Connect each terminal between the other terminal and the other terminal of the AC power supply.
And turn on in response to the door being closed,
Two door switches that turn off when opened
And the door is opened when the heater is energized.
When the heater is turned off, the door closes within a certain time
And a control device for re-energizing the heater when the
Characterized in was and configuration.

[0010]

According to the above means, when the heater is energized, the heater is cut off when the door is opened, so that there is no danger of electric shock even if the heater tube is broken.

In addition, while the heater is turned off when the door is opened, if the opened door is closed within a predetermined time, the heater is re-energized.
For example, if it is necessary to open the door during cooking and it is opened, or if the door is accidentally opened, if the door is closed and closed within a certain period of time, the heater will be re-energized and cooking will automatically start. Will be resumed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, in FIG. 2, the cooking device 1 is configured by combining a cooking heater 2 and a roaster 3 to which the present invention is applied.

In this case, the cooking heater 2 includes three cooking heaters 4 and a top plate 5 that covers the cooking heaters 4 from above.
A pot or the like is placed on the top plate 5 and cooked by heating it with the cooking heater 4.

On the other hand, the roaster 3 is incorporated in a case 6. A roasting chamber 7 is formed inside the roaster 3, and the roasting chamber 7 is opened and closed by a heat-resistant glass door 9 having a handle 8. Inside the roast chamber 7, shown to the two heaters 10, 10 in FIG. 1, it is arranged in a state exposed to the roasting chamber 7. Although not shown, the heater 10 has a configuration in which a heater wire is covered with a glass tube, in this case, a ceramic tube, and emits high heat while emitting light through the ceramic tube.

The two heaters 10 are connected in parallel between both terminals of an AC power supply 11. A power switch 12 and a first main door switch 13 that responds to opening and closing of the door 9 are connected in series between one terminal of the AC power supply 11 and a common connection point of the heaters 10 and 10. ing. Further, the other terminal of the AC power supply 11 and the heater 10,
A second main door switch 14 that responds to opening and closing of the door 9 and a relay switch 16a of a relay 16 that is controlled by a microcomputer 15 as a control device are connected in series between the common connection point 10 and the common connection point 10. ing.

The microcomputer 15 is supplied with power from an AC power supply 11 via a DC constant voltage circuit 17. In addition, this microcomputer 1
5 includes an operation unit 18 provided on the front of the case 6, an auxiliary door switch 19 that responds to opening and closing of the door 9, a thermistor 20 for detecting the temperature in the roasting chamber 7, and a buzzer 21.
Is connected.

Although not shown, the operation unit 18 is provided with a plurality of keys such as a timer key for setting a cooking time, a start key for starting cooking, and a stop key for stopping cooking.

The microcomputer 15 detects opening and closing of the door 9 by turning on and off the auxiliary door switch 19, and further, based on a detection signal of the thermistor 20, the microcomputer 15 inside the roasting chamber 7 during cooking. The temperature is controlled, for example, in the range of 200 to 250 ° C. .

Next, the operation of the above configuration will be described mainly with reference to the flowchart of FIG. It should be noted that the flowchart of FIG. 3 shows only a portion related to the gist of the present invention.

In order to bake an object to be cooked, for example, fish, the user first opens the door 9 of the roasting chamber 7, accommodates the fish in the roasting chamber 7, closes the door 9, and turns on the power switch 12. Manipulate. At this time, when the door 9 is closed, the first and second main door switches 13, 14 and the auxiliary door switch 19 are closed.

Then, after initialization (step S1), the microcomputer 15 waits until a timer key or a start key of the operation section 18 is operated (steps S2 and S3).

Here, for example, the timer key is not operated,
When only the start key is operated (in the case of manual cooking), the heaters 10 and 10 are turned on by turning on the relay switch 16a of the relay 16 on condition that the door 9 is closed (step S4). Power is supplied (step S5). Cooking is started by the energization of the heaters 10, 10.

In step S6, the process waits until the stop key is operated, and turns off the relay switch 16a based on the operation of the stop key, thereby turning off the heaters 10 and 10 (step S6).
7). Thus, the manual cooking is completed. At this time, if the door 9 is opened while the heaters 10 and 10 are energized, the first and second main door switches 13 and 14 are both turned off, so that the heaters 10 and 10 are cut off.

On the other hand, if the timer key is operated to select timer cooking in step S2, the cooking time (T) of the first timer is determined based on the operation of the timer key.
Is set (step S8). Then, on condition that the start key is operated (step S9) and that the door 9 is closed (step S10), the heaters 10, 10 are energized via the relay switch 16a (step S11). The timer 1 starts counting (step S12). Thereby, timer cooking is started.

During this timer cooking, timer cooking is executed until the set cooking time (T) elapses, provided that the stop key is not operated and the door 9 is not opened (steps S13 and S14). , S1
5). When the set cooking time (T) has elapsed, the process proceeds to step S16 according to "Y" in step S14. In step S16, the heaters 10, 10 are turned off via the relay switch 16a, thereby ending the timer cooking.

If the stop key is operated during the timer cooking, the process proceeds to step S16 according to "Y" in step S13, the heaters 10 and 10 are cut off, and the cooking is completed.

During the timer cooking, if the door 9 is opened, the first and second main door switches 1
At the same time, the auxiliary door switch 19 is turned off. When the first and second main door switches 13 and 14 are turned off, the heaters 10 and 10 are turned off. The microcomputer 15 detects that the door 9 has been opened by turning off the auxiliary door switch 19, and based on this, the relay switch 16a
Is turned off, so that the heaters 10, 10 are also turned off (step S17).

Next, the microcomputer 15 stops counting by the first timer in step S18, and starts counting by the second timer in step S19. Then, in steps S20 and S21, the process waits until the time during which the door 9 is open has elapsed for the predetermined time t.

When a predetermined time t (for example, one minute) has elapsed while the door 9 is open, the process proceeds to step S22 in accordance with "Y" in step S21, and the buzzer 21 is driven and notified. In this case, even if there is a remaining time of the cooking time, the process is ended as it is.

In the above steps S20 and S21, the door 9 is opened before the time during which the door 9 is
Is closed, the process proceeds to step S23 according to "Y" in step S20. In step S23, the closing of the door 9 is detected by turning on the auxiliary door switch 19 with the closing of the door 9, and based on this, the relay switch 16a is turned on to re-energize the heaters 10, 10.
At this time, when the door 9 is closed, both the first and second main door switches 13 and 14 are closed.

Then, in step S24, the first timer is restarted, and thereafter, the process proceeds to step S13. Then, cooking is performed for the remaining time of the set cooking time (T).

According to the above-described embodiment, the heater wire is used as the heating source because the heater wire is covered with the ceramic tube and emits heat while emitting light through the tube. Since the amount of heat radiated is large and the rising performance is good, and a lot of light is emitted through the ceramic tube, the roast chamber 7 is bright,
The inside becomes easy to see from the outside.

In addition, even when such a heater 10 is used, when the heater 10 is energized, the heater 10 is cut off when the door 9 is opened. Even if it is damaged, there is no risk of electric shock, and safety can be improved. In this case, in particular, an alternating current is applied to both terminals of the heaters 10, 10.
The first and second main terminals are respectively connected to both terminals of the power supply 11.
Switches 13 and 14 are connected and door 9 is open.
The first and second main door switches 13 and 13
When the AC power supply 11 is turned off,
Since the motors 10 and 10 are in a double-cut state,
It can further improve the integrity.

Further, while the heater 10 is turned off when the door 9 is opened, it is necessary to open the door 9 during timer cooking, for example, when the door 9 is opened. Alternatively, when the door 9 is opened by mistake, if the door 9 is opened and then closed within a predetermined time (t), the heater 10 is re-energized. There is no need to operate the start key one by one in order to resume operation, and the device is easy to use.

In this case, if the door 9 is not closed within a certain period of time after being opened, the buzzer 2
1, the user is notified of the fact, so that the usability is further improved and the door 9 can be prevented from being left in a half-closed state.

In the above embodiment, the heater 10 is re-energized when the door 9 is once opened and then closed within a predetermined time only during the timer cooking. However, the present invention is not limited to this. For example, even during manual cooking, the heater 9 may be re-energized when the door 9 is once opened and then closed within a predetermined time.

As means for notifying that the door 9 has not been closed even after a certain time has passed since the door 9 was opened,
Not limited to the buzzer 21, for example, a light emitting element such as an LED may be provided on the operation unit 18 or the top plate 5, and the light emitting element may be turned on or off.

[0038]

As is apparent from the above description, according to the roaster of the present invention, a heater which is a heater which emits heat while emitting light through the tube is covered by a heater wire as a heating source. In the apparatus used, safety can be improved by turning off the heater when the door of the roasting chamber is opened when the heater is energized. Moreover, the heater is double-cut for AC power supply
Therefore, safety can be further improved. In this case, when the door once opened is closed within a predetermined time, the heater is re-energized, so that the usability can be improved.

[Brief description of the drawings]

FIG. 1 is an electrical configuration diagram showing an embodiment of the present invention.

FIG. 2 is an external perspective view.

FIG. 3 is a flowchart showing control contents of a microcomputer.

[Explanation of symbols]

3 is roaster, 7 is roast room, 9 is door, 11 is AC power
Source, 10 is a heater, the 13, 14 first and second main door switch, 15 is a microcomputer (control device),
Reference numeral 16 denotes a relay, 18 denotes an operation unit, and 19 denotes an auxiliary door switch.

Claims (1)

(57) [Scope of request for utility model registration] Roast chamber for accommodating a 1. A the foods, provided in a state exposed in this roasting chamber, a heater for emitting heat while emitting light through the tube heater wire is covered by a pipe such as a glass tube And a door for opening and closing the roast chamber , between one terminal of the heater and one terminal of the AC power supply.
And the other terminal of the heater and the other terminal of the AC power supply
Respectively, according to that said door is closed
Two doors that turn on and turn off when the door is opened
A roaster comprising: a switch; and a control device for turning off the heater when the door is opened when the heater is energized, and for re-energizing the heater when the door is closed within a predetermined time. .