JP2011185506A - Oven toaster - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve cooking performance during cutoff of heater energization due to operation of a thermostat. <P>SOLUTION: The oven toaster includes a heater 2 attached to a heating chamber 1 housing a heating object and carrying out cooking, a temperature detecting means 3 for detecting a temperature in the heating chamber 1, a control means 4 for determining a cooking time by a temperature of the cooking chamber 1 at cooking starting and a time from cooking completion of a last time to cooking starting of this time and carrying out cooking by carrying out energization control of the heater 2 during the determined cooking time, and a thermostat monitoring means 10 for carrying out monitoring of operation of the thermostat 9 installed near the heating chamber 1. In the control means 4, extension of the cooking time is carried out in response to opening and closing of a thermostat 9 contact detected during cooking by the thermostat monitoring means 10, and by this, even if the thermostat 9 is operated and the heater 2 is temporarily cut off when continuously carrying out cooking or the like, the cooking performance is improved by automatically carrying out extension of cooking. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an oven toaster that automatically cooks according to the temperature in a heating chamber.

  Conventionally, this type of oven toaster is configured to automatically perform cooking control according to the temperature in the heating chamber (see, for example, Patent Document 1).

  FIG. 4 shows a configuration diagram of a conventional oven toaster described in Patent Document 1. As shown in FIG. As shown in FIG. 4, a heating chamber 1 for storing an object to be heated and cooking the heated object, a heater 2 attached in the heating chamber 1, and a temperature detection means 3 for detecting the temperature in the heating chamber 1 The control means 4 performs cooking by controlling energization of the heater 2 by a signal from the temperature detection means 3, and the thermostat 9 connected in series with the heater 2.

JP-A-7-27345

  However, in the above-described conventional configuration, the control means determines the cooking time based on the temperature in the heating chamber at the start of cooking and the time from the end of the previous cooking to the start of the current cooking, and performs cooking. If the thermostat attached to prevent the temperature in the heating chamber from becoming abnormally high when the operation is performed and the heater is temporarily turned off, the amount of heat applied to the object to be heated will be insufficient. There was a problem that sufficient cooking performance could not be obtained.

  The present invention solves the above-mentioned conventional problems. When a thermostat is operated and cooking is temporarily interrupted when cooking is continuously performed, heating cooking is automatically extended and the food is covered. An object of the present invention is to provide an oven toaster with improved cooking performance by supplementing the amount of heat given to the heated object.

  In order to solve the above-described conventional problems, an oven toaster of the present invention includes a heating chamber in which an object to be heated is stored and cooked, a heater attached to the heating chamber, and a temperature at which the temperature in the heating chamber is detected. The heating means is determined from the detection means, the temperature of the heating chamber at the start of cooking and the time from the end of the previous cooking to the start of the current cooking, and the energization control of the heater is performed during the determined cooking time. A control means for performing cooking by heating, a thermostat installed in the vicinity of the heating chamber, and a thermostat monitoring means for monitoring the operation of the thermostat, the control means during the cooking by the thermostat monitoring means When opening of the thermostat contact is detected, the cooking time is extended according to the opening and closing of the thermostat contact.

As a result, even if the thermostat operates and the heater energization is temporarily interrupted during continuous cooking, the thermostat monitoring means detects the opening of the thermostat contact, and the control means detects the thermostat contact. By automatically extending cooking according to opening and closing, the cooking performance is improved by supplementing the amount of heat which is temporarily cut off due to the heater being cut off in addition to the object to be heated according to the situation.

  The oven toaster of the present invention improves cooking performance by automatically extending cooking even when the thermostat operates and the heater is temporarily shut off when cooking is continuously performed, etc. An object to be heated in a desired cooking state can be provided to a person.

The block diagram of the oven toaster in Embodiment 1 of this invention Circuit diagram of oven toaster in Embodiment 1 of the present invention (A) in the first embodiment of the present invention is a temperature change characteristic diagram of the heating chamber of the oven toaster. (B) is a heater operation characteristic diagram of the oven toaster. (C) is a heater current ratio characteristic diagram of the oven toaster. Configuration diagram of a conventional oven toaster

  1st invention contains the to-be-heated material, the heating chamber which cooks, the heater attached to the said heating chamber, the temperature detection means to detect the temperature in the said heating chamber, and the said heating at the time of a heating cooking start Control means for determining the cooking time from the temperature of the room and the time from the end of the previous cooking to the start of the current cooking, and performing the cooking by performing energization control of the heater during the determined cooking time; A thermostat installed in the vicinity of the heating chamber, and thermostat monitoring means for monitoring the operation of the thermostat, and the control means detects the opening of the thermostat contact during cooking by the thermostat monitoring means , By extending the cooking time in response to the opening and closing of the thermostat contacts, the amount of heat that is insufficient when the heater energization is temporarily interrupted, By supplementing, in addition to the heated object in accordance with the situation, the cooking performance is improved.

  In the second aspect of the invention, in particular, the control means of the first aspect of the invention measures the opening time of the thermostat contact and heats it for a time corresponding to the ratio between the determined cooking time and the opening time of the thermostat contact. By setting it as the structure which extends cooking time, it becomes possible to add the calorie | heat amount required for cooking by extending cooking for the time according to the condition, and can aim at the improvement of cooking performance.

  In the third aspect of the invention, in particular, the control means of the first aspect of the invention measures the opening time of the thermostat contact, and sets the heater energization rate according to the ratio between the determined cooking time and the opening time of the thermostat contact. By extending the cooking time for a predetermined time, it is possible to extend cooking for a predetermined time at a heater energization rate according to the situation, and it is possible to add the amount of heat necessary for cooking, The cooking performance can be improved.

  In the fourth aspect of the invention, in particular, the control means of the second aspect of the invention measures the opening time of the thermostat contact, and is predetermined by the time corresponding to the ratio between the determined cooking time and the opening time of the thermostat contact. The heating cooking time can be extended with the heater energization rate of the heater, and heating cooking can be extended by heating at the predetermined heater energization rate for the time according to the situation, and the amount of heat required for cooking Can be added, and cooking performance can be improved.

  In the fifth aspect of the invention, in particular, the heater energization rate of the fourth aspect of the invention is such that the ratio of the determined cooking time and the opening time of the contact point of the thermostat reduces the radiant heat to the object to be heated. It is possible to adjust, and an appropriate amount of heat can be applied while preventing the surface of the object to be heated from being too scorched, thereby improving cooking performance.

  In the sixth aspect of the invention, in particular, the control means of the first aspect of the invention extends the cooking time by a time corresponding to the temperature rise within a predetermined time after the thermostat contact is closed and the heater is re-energized. By doing, cooking can be extended for the time according to the situation, it becomes possible to add the amount of heat necessary for cooking, and the cooking performance can be improved.

  According to a seventh aspect of the present invention, in particular, the control means of the first aspect of the present invention is configured to cook for a predetermined time at a heater energization rate corresponding to a rising temperature within a predetermined time after the thermostat contact is closed and the heater is re-energized. By adopting a configuration that extends the time, it is possible to add the amount of heat necessary for cooking by extending the cooking for a predetermined time at the heater energization rate according to the situation, and improve the cooking performance. .

  In the eighth aspect of the invention, in particular, the control means of the sixth aspect of the invention is configured to heat at a predetermined heater energization rate for a time corresponding to the rising temperature within a predetermined time after the contact of the thermostat is closed and the heater is re-energized. By adopting a configuration that extends the cooking time, cooking can be extended at a predetermined heater energization rate for the time according to the situation, and it becomes possible to add the amount of heat necessary for cooking, improving cooking performance Can be planned.

  In the ninth aspect of the invention, in particular, the heater energization rate of the eighth aspect of the invention is such that the heater is closed by closing the thermostat contact and the heater is re-energized, so that the heater is heated. Radiant heat can be adjusted, and an appropriate amount of heat can be applied while preventing overheating of the surface of the object to be heated, and cooking performance can be improved.

  In the tenth aspect of the invention, in particular, the control means of the first aspect of the invention measures the time from the start of cooking until the thermostat contact opens, and the time and heating from the start of cooking until the thermostat contact opens. By extending the cooking time by the time corresponding to the temperature of the heating chamber at the start of cooking, the time from the start of cooking until the heater energization is stopped for the ambient temperature and the capacity of the object to be heated. And by detecting the temperature of the heating chamber at the start of cooking, and extending the cooking for a time according to the situation, it becomes possible to add the amount of heat necessary for cooking, and the cooking performance can be improved.

  In the eleventh aspect of the invention, in particular, the control means of the first aspect of the invention measures the time from the start of cooking to the opening of the thermostat contact, the time from the start of cooking to the opening of the thermostat contact and the heating. The heater energization rate according to the temperature of the heating chamber at the start of cooking is configured to extend the cooking time for a predetermined time, so that the ambient temperature and the capacity of the object to be heated can be changed from the start of cooking to the heater. It can be detected by the time until energization is stopped and the temperature of the heating chamber at the start of cooking, and it is possible to add the amount of heat necessary for cooking by extending cooking for a predetermined time at the heater energization rate according to the situation. The performance can be improved.

  In a twelfth aspect of the invention, in particular, the control means of the tenth aspect of the invention measures the time from the start of cooking until the thermostat contact opens, and the time and heating from the start of cooking until the thermostat contact opens. By configuring the heating cooking time to be extended by a predetermined heater energization rate for the time corresponding to the temperature of the heating chamber at the start of cooking, the ambient temperature and the capacity of the object to be heated can be changed from the start of cooking to the heater. It can be detected by the time until energization is stopped and the temperature of the heating chamber at the start of cooking, and it is possible to add the amount of heat necessary for cooking by extending the cooking at a predetermined energization rate for the time according to the situation. The cooking performance can be improved.

In the thirteenth aspect of the invention, in particular, the heater energization rate of the ninth aspect of the invention is configured to correspond to the time from the start of cooking until the thermostat contacts are opened and the temperature of the heating chamber. Radiant heat can be adjusted, and an appropriate amount of heat can be applied while preventing the surface of the object to be heated from being too scorched, thereby improving cooking performance.

  According to the fourteenth aspect of the invention, in particular, when the cooking of any one of the first to thirteenth aspects of the invention is extended, the user is provided with a notification means for notifying that the cooking is being extended. You can easily know that you are in the middle, and you can reduce the irritation of waiting time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a block diagram of an oven toaster according to the first embodiment of the present invention.

  In FIG. 1, a heating chamber 1 accommodates an object to be heated and cooks, and in the heating chamber 1, a heater 2, temperature detecting means 3 for detecting the temperature in the heating chamber 1, and the object to be heated are placed. A grill 6 is installed. When the cooking start SW 7 is pressed, the control means 4 starts cooking by sending a signal to the heater energizing means 5, and the control means 4 starts from the time when the previous cooking is completed until the current cooking is started. The cooking time is determined from this time and the temperature in the heating chamber 1 at the start of cooking. When the determined cooking time elapses, energization of the heater 2 is stopped and cooking is stopped.

  A thermostat 9 connected in series with the heater 2 is attached in the vicinity of the heating chamber 1, and when the temperature in the heating chamber 1 reaches a first predetermined temperature or more, the contact is opened and the energization to the heater is interrupted. When the temperature drops below the second predetermined temperature, the contact is closed again and energization of the heater is resumed. The thermostat monitoring unit 10 monitors the operation of the thermostat 9 during cooking, and sends a signal indicating that the thermostat 9 is opened to the control means 4 when the contact of the thermostat 9 is opened. Furthermore, when the thermostat contact is opened and the heater energization is temporarily interrupted, the control means 4 also determines the determined cooking time and the time when the thermostat contact is opened even after the determined cooking heating time has elapsed. The heating cooking time is automatically extended in accordance with the temperature rise at the time of reheating and the time from the start of cooking until the contact of the thermostat 9 is opened. In addition, when the heating extension is automatically performed, a notifying means 8 for notifying that effect is provided.

  FIG. 2 is a circuit diagram of the oven toaster according to the first embodiment of the present invention.

  In FIG. 2, a power supply for a circuit is generated by a power supply circuit unit 12 from a power supply supplied from a commercial power supply 11. The heater energization means 5 includes a relay 5a and a relay drive unit 5b, and turns on / off the heater energization by opening and closing the contact of the relay 5a. In general, during heating cooking such as toast, the contact of the relay 5a is kept closed and the heater energization is continued.

  The thermostat monitoring unit 10 includes a resistor 10a, a resistor 10b, a diode 10c, and a diode 10d. When the contact of the thermostat 9 is closed, a pulse signal synchronized with the cycle of the commercial power supply 11 is output from a microcomputer or the like. It is output to the configured control means 4. Further, when the contact of the thermostat 9 is opened, the pulse signal disappears. The control means 4 determines the opening / closing of the contacts of the thermostat 9 based on the presence / absence of a pulse from the thermostat monitoring unit 10.

  The control means 4 is connected to the temperature detection means 3, the cooking start SW 7 and the notification means 8, and sends and receives signals to control the heating of the oven toaster.

  About the oven toaster comprised as mentioned above, the operation | movement and an effect | action are demonstrated below, using FIG.

  FIG. 3A is a temperature change characteristic diagram in the heating chamber 1 during cooking by the oven toaster in the first embodiment of the present invention, and FIG. 3B is a graph showing a change in temperature in the heating chamber 1. FIG. 3C is a heater operating characteristic diagram, and FIG. 3C is a heater energization characteristic graph corresponding to the temperature change in the heating chamber 1.

  When the cooking start SW 7 is pressed, the control means 4 receives the signal and starts energizing the heater. Further, the control means 4 determines the cooking time based on the temperature θ0 in the heating chamber 1 at the start of cooking and the time TR from the end of the previous heating cooking to the current heating cooking start time. Here, let the determined cooking time be T4.

  Generally, when the temperature θ0 in the heating chamber 1 at the start of cooking is the same, the cooking time is determined to be longer as the TR time is longer (the time from the end of the previous heating cooking to the start of the current cooking). The

  When the TR time is the same, the cooking time is determined to be longer as the temperature θ0 in the heating chamber 1 at the start of cooking is lower.

  The thermostat 9 determines that the heater is overheated when the temperature in the heating chamber 1 reaches θ3 at T1 during cooking, and the contact is opened to interrupt the heater energization. When time elapses, the temperature in the heating chamber 1 decreases, and when the temperature reaches θ1 (<θ3), the contact of the thermostat 9 is closed again and the heater is energized. The control means 4 measures the time TOFF during which the contact point of the thermostat 9 from T1 to T2 is open, determines the heating cooking extension time Tα by the ratio (TOFF / T4) of the determined cooking time T4 and the heater stop time TOFF, After T4, the heater is energized for Tα time to extend cooking. In the case of the same cooking time, the heat cooking extension time Tα becomes longer as the ratio of the heater stop time TOFF to the determined cooking time T4 increases.

  As described above, in the present embodiment, even when the thermostat contact is opened and the heater energization is interrupted when cooking is performed continuously, the control means 4 is connected to the thermostat contact by the thermostat monitoring means. By detecting the opening and automatically extending the cooking time, it becomes possible to add a heat amount according to the situation to the object to be heated, and the cooking performance can be improved.

  Moreover, the control means 4 may extend cooking for a predetermined time from the heating cooking time determined by the heater energization rate according to the ratio of the determined heating cooking time and the heater energization stop time. Thereby, it is possible to prevent the object to be heated from being overly baked by reducing the similar effect and the heater energization rate and suppressing the radiant heat.

  Further, the same effect can be obtained even if the cooking extension time is determined by a combination of the time corresponding to the ratio of the determined heating cooking time and the heater energization stop time and the heater energization ratio.

(Embodiment 2)
The configuration of the second embodiment of the present invention is the same as the configuration of the first embodiment, and a description thereof will be omitted.

  In FIG. 3, only the parts of the operation and action of the second embodiment different from those of the first embodiment will be described.

The thermostat 9 determines that the heater is overheated when the temperature in the heating chamber 1 reaches θ3 at T1 during cooking, and the contact is opened to interrupt the heater energization. When time elapses, the temperature in the heating chamber 1 decreases, and when the temperature reaches θ1 (<θ3), the contact of the thermostat 9 is closed again and the heater is energized.

  The control means 4 measures the rising temperature θj (θ2−θ1) from the time T2 when the contact of the thermostat 9 is closed again and the heater is energized to the time T3 when the time Tj has elapsed, and cooking is performed according to the rising temperature θj. The extension time Tα is determined, and the cooking time is extended by energizing the heater for Tα time after the determined cooking time T4.

  It can be judged that the capacity of the object to be heated is large or the ambient temperature is low as the temperature rise θj from the time T2 to the time T3 when the power is re-energized is small, and the heating cooking extension time Tα becomes long.

  As described above, in the present embodiment, the controller 4 detects the ambient temperature and the capacity of the object to be heated based on the rising temperature within a predetermined time when the heater is re-energized, and the time corresponding to the situation is detected. Because the cooking time is extended beyond the determined cooking time, the necessary heat capacity can be given even with the difference in the capacity of the object to be heated and the difference in the ambient temperature when the heater is re-energized. Can be improved.

  Further, the control unit 4 may extend cooking for a predetermined time from the determined cooking time by the heater energization rate corresponding to the temperature rise within the predetermined time when the heater is re-energized. Thereby, it is possible to prevent the object to be heated from being overly baked by reducing the heater energization rate and suppressing the radiant heat.

  Further, the same effect can be obtained even when the cooking extension time is determined by a combination of the time corresponding to the rising temperature within the predetermined time at the time of re-energization of the heater and the heater energization ratio.

(Embodiment 3)
The configuration of the third embodiment of the present invention is the same as that of the first embodiment, and a description thereof will be omitted.

  In FIG. 3, only the parts of the operation and action of the third embodiment different from those of the first embodiment will be described.

  The control means 4 measures the time T1 from the start of cooking until the contact of the thermostat 9 is opened and the heater energization is stopped, and the heating cooking is extended from the measured time T1 and the temperature θ0 of the heating chamber at the start of cooking. The time Tα is determined, and the cooking time is extended by energizing the heater for Tα time after T4.

  When the temperature θ0 of the heating chamber at the start of cooking is the same, the longer the time T2 until the temperature in the heating chamber 1 reaches θ3 determined to be overheating, the larger the capacity of the object to be heated or the ambient temperature is Since it is determined to be low, the heating cooking extension time Tα is set long.

  As described above, in this embodiment, the ambient temperature depends on the time from the start of cooking by the control means 4 until the thermostat contact is opened and the heater energization is stopped and the temperature of the heating chamber at the start of cooking. And the amount of heat to be heated is detected and the cooking time is extended by the cooking time determined according to the situation. Cooking performance can be improved.

Further, the controller 4 may extend the cooking for a predetermined time from the determined cooking time by the heater energization rate according to the time from the start of cooking to the stop of the heater and the temperature of the heating chamber at the start of cooking. Thereby, it is possible to prevent the object to be heated from being overly baked by reducing the heater energization rate and suppressing the radiant heat.

  Further, the same effect can be obtained even if the cooking extension time is determined by a combination of the time from the start of cooking to the stop of the heater, the time corresponding to the temperature of the heating chamber at the start of cooking, and the heater energization ratio.

  As described above, the oven toaster according to the present invention automatically cooks by extending the cooking even when the thermostat operates and the heater is temporarily shut off when cooking is performed continuously. Since the performance can be improved and the object to be heated in a desired cooking state can be provided to the user, it can also be applied to uses such as a hot cooker that uses a thermostat such as a hot plate.

DESCRIPTION OF SYMBOLS 1 Heating chamber 2 Heater 3 Temperature detection means 4 Control means 5 Heater energization means 6 Grill net 7 Cooking start SW
8 Informing means 9 Thermostat 10 Thermostat monitoring unit

Claims (14)

A heating chamber for storing an object to be heated and cooking, a heater attached to the heating chamber, temperature detecting means for detecting the temperature in the heating chamber, the temperature of the heating chamber at the start of cooking, and the previous time The heating cooking time is determined from the time from the end of cooking to the start of the current cooking, and the heating means is controlled by energizing the heater during the determined heating cooking time, and installed in the vicinity of the heating chamber. Thermostat monitoring means for monitoring the operation of the thermostat, and the control means detects the opening of the thermostat contact when the thermostat monitoring means detects the opening of the thermostat contact during cooking. An oven toaster that extends the cooking time according to opening and closing. The control means measures the opening time of the thermostat contact and extends the cooking time by a time corresponding to the ratio between the determined cooking time and the opening time of the thermostat contact. The toaster oven described. The control means measures the opening time of the thermostat contact, and extends the cooking time by a predetermined time at a heater energization ratio according to the ratio between the determined cooking time and the opening time of the thermostat contact. The oven toaster according to claim 1. The control means measures the opening time of the thermostat contact, and extends the cooking time by a predetermined heater energization rate by a time corresponding to the ratio between the determined cooking time and the opening time of the thermostat contact. The oven toaster according to claim 2 which was constituted. The oven toaster according to claim 4, wherein the heater energization rate is configured in accordance with a ratio between the determined cooking time and the opening time of the thermostat contact. The oven toaster according to claim 1, wherein the control means is configured to extend the cooking time by a time corresponding to the rising temperature within a predetermined time after the contact of the thermostat is closed and the heater is re-energized. The control means is configured to extend the cooking time for a predetermined time at a heater energization rate corresponding to a temperature rise within a predetermined time after the contact of the thermostat is closed and the heater is re-energized. Oven toaster. The control means is configured to extend the cooking time at a predetermined heater energization rate for a time corresponding to the rising temperature within a predetermined time after the contact of the thermostat is closed and the heater is re-energized. The toaster oven described. The oven toaster according to claim 8, wherein the heater energization rate is configured to correspond to a rising temperature within a predetermined time after the contact of the thermostat is closed and the heater is energized again. The control means counts the time from the start of cooking until the thermostat contact opens, and the time corresponding to the time from the start of cooking until the thermostat contact opens and the temperature of the heating chamber at the start of cooking. The oven toaster according to claim 1, wherein only the cooking time is extended. The control means measures the time from the start of cooking to the opening of the thermostat contact, and energizes the heater in accordance with the time from the start of cooking to the opening of the thermostat contact and the temperature of the heating chamber at the start of cooking. The oven toaster according to claim 1, wherein the cooking time is extended for a predetermined time at a rate. The control means counts the time from the start of cooking until the thermostat contact opens, and the time corresponding to the time from the start of cooking until the thermostat contact opens and the temperature of the heating chamber at the start of cooking. The oven toaster according to claim 10, wherein the cooking time is extended by a predetermined heater energization rate. The oven toaster according to claim 9, wherein the heater energization rate is configured in accordance with a time from the start of cooking to a time when the thermostat contact is opened and a temperature of the heating chamber. The oven toaster according to any one of claims 1 to 13, further comprising notification means for notifying that heating cooking is being extended when heating cooking is extended.

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