JPH0638887A - Heating control device of bread baking machine - Google Patents

Abstract

PURPOSE:To prevent the killing of yeast plants in a baking machine by outputting a warning from a detecting means responding to the set temperatures before and after the starting of a baking operation. CONSTITUTION:A dough sensor 28 such as a thermistor to be a temperature detecting means is provided at the upper end of a rotary shaft 22. While an oven sensor 35 such as a thermistor is fixed to the internal surface of an inner case 11, a thermostat 36 is fixed to the outer side surface of the inner case 11. When the baking process is reserved, a main heater 15 is operated intermittently in a preheating process, and the temperature is maintained at t1 degree or higher depending on the output of the oven sensor 35, so as to prevent the killing of yeast plants 5. Then, the temperature in a case 16 is maintained at t2 degree depending on the output of the dough sensor 28, and furthermore, it is maintained at t3 degree depending on the output of the oven sensor 35. In the process from the preheating to the oven heating, it is confirmed that the temperature is lower than t4 degree depending on the thermostat 36, and when the temperature rises 60 deg. or higher to kill the yeast plants, the baking operation is stopped as well as outputting a warning of an error display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a bread maker in which wheat flour, water, baking powder and the like are put into a bread baking case, the wheat flour and the like are kneaded in the bread baking case, and primary baking and secondary fermentation are carried out, followed by baking. The present invention relates to a heating control device.

[0002]

2. Description of the Related Art Conventionally, a bread maker has been developed in which kneading, fermentation and baking of bread ingredients are continuously controlled by controlling time and temperature.

[0003]

In the above prior art, when the minimum temperature is held by a reserved operation such as a timer, the inside temperature of the oven may become excessive and the yeast bacteria may be killed. There is a possibility that yeast may be added to kill the yeast, and safety and handling operability cannot be easily improved.

[0004]

[Means for Solving the Problems] In a device provided with a baking case in which bread ingredients are added to carry out kneading, fermentation and baking, and the baking case is provided in an oven, the inside of the oven is set as a yeast kill temperature. And a means for alarming when the means responds to the set temperature before starting the bread making operation, and the detecting means sets the setting after starting the bread making operation. With a means for issuing an alarm when responding to temperature, it is possible to properly monitor the temperature after the bread making reservation operation and after the bread making, and it is possible to easily improve safety and handling operability, etc. compared to the past. The temperature control function required for yeast can be easily improved.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a control circuit diagram of a main part, FIG. 2 is a front view of the whole,
FIG. 3 is a cross-sectional side view, which includes a cylindrical grill body (2) supported by supporting legs (1) ..., and an operating panel (3) for time setting and burning selection. In the center of the front of the grill, and on the left and right of the grill body (2), carry handles (4) are respectively arranged, and a transparent glass dome-shaped lid (5) is placed on the grill body (2). The lid (5) is attached to the fulcrum bracket (7) of the grill body (2) through the forehead frame (6) so that the rear side of the lid (5) can be opened and closed. The handgrip (8) is integrally formed with the forehead frame (6). Also, a cylindrical outer case (9), a bottom case (10) that is fitted and fixed to the lower end side of the outer case (9), and an upper opening cylinder that is installed in the upper half of the outer case (9) to form an oven chamber. A container-shaped inner case (11), each case (11), and each case (9) (10) (11)
The oven main body (2), which is an oven, is constituted by the above, and the display and switch mounting board (12) and the arithmetic circuit board (13) are arranged inside the front surface of the outer case (9).

Further, the bottom of the inner case (11) is mounted and fixed on the upper surface of the base (14) which is erected and fixed on the bottom case (10), and an annular heat radiation type main body which is an electric heating member is provided on the inner circumference of the inner case (11). A baking case (16) is provided with a heater (15) fixed and an upper opening cylindrical container type baking case (16) for kneading, fermenting and baking by adding bread ingredients such as flour and water and baking powder. The bottom part of the case (16) is detachably supported by the bottom part of the inner case (11) by locking tongues (17) and (18) which are engaged and disengaged by the rotation of a stirring blade (for mixing bread ingredients such as wheat flour). 19) is provided on the bottom of the firing case (16),
A ridge body (20) for preventing the clay-like bread material (dough) from entraining the blade (19) is fixed to the inner side surface of the baking case (16).

Further, the inner case (11) and the base (1)
4) The bearing plate (21) is sandwiched and fixed via the locking tongue (18), and the blade (19) is detachably attached to the upper end of the rotary shaft (22) that is pivotally supported by the bearing plate (21). And a main stirring motor (24) is attached to the base (14) through a bracket (23), and the timing pulleys (25) (26) and the timing belt (27) are attached.
The rotary shaft (22) and the motor (24) are interlocked with each other via a rotary shaft (22), and a dough sensor (28) such as a thermistor as a temperature detecting means is provided at the upper end of the rotary shaft (22).

Further, an outside air intake air passage (29) is formed in the bottom case (10), and a bear removal type fan motor (30) is formed.
The blower fan (31) driven by the air passage (29)
The fan duct (33) is fixed to the outer surface of the inner case (11) by attaching the heating fan heater (32) to the exhaust side of the fan (31). The lower end side of the duct (33) communicates with the exhaust side of the passage (29), and a guide duct (34) for sending the air from the fan (31) into the firing case (16) is provided with the air duct (33). ) It is swingably connected to the upper end.

Further, an oven sensor (35) such as a thermistor which is a temperature detecting means is fixed to the inner side surface of the inner case (11), and a thermostat (36) which is a temperature detecting means is attached to the outer side surface of the inner case (11). The sensor (28) (35) and the thermostat (36) fixed to the
Is configured to detect the temperature in multiple stages during the bread making operation.

Further, as shown in FIG. 1, a menu switch (37) for selecting the type of bread (bread, French bread, etc.), a reservation switch (38) for setting the baking time of the bread, and a reset for resetting these initial settings. Switch (39), switch for changing hour and minute of reserved time (4
0) (41), a switch (42) for setting a clock, and a start switch (43) for starting bread making. Then, the switches (37) to (43) are connected to a pan adjusting circuit (44) composed of a microcomputer, and a seven segment type indicator (45) for displaying a time and an error for alarm is provided in the circuit (44). )
The sensor (28) (35) and the thermostat (36) are connected to the circuit (44) by input, and the inside of the grill main body (2) that constitutes the oven has a yeast kill temperature (about 60%). The thermostat (36), which is a means for detecting whether or not the temperature is below ° C),
After the bread making reservation operation and before the bread making operation, an alarm such as an error display and the stopping of the bread making operation are performed based on the excessive temperature output from the thermostat (36), while the thermostat (36) is made after the bread making is completed. When an alarm such as an error display is issued based on the excessive temperature output from, the bread ingredients and baking powder (yeast bacteria) are put in after the inside of the baking case (16) has cooled, and the yeast bacteria due to high temperature are put in. It is configured to prevent the death of.

Further, the power is applied to the main motor (24) through the normally open relay switch (47) of the relay (46) connected to the pan adjusting circuit (44), and
A current sensor (48) for detecting the power supply of the heater (15) by the current flowing through the main heater (15)
And a triac (49) which is a control means for blocking the operation of the main heater (15) other than the heating timing in the bread making operation, and the main heater when the heating operation signal from the bread preparation circuit (44) is off. A relay (50) which is a control means for turning off the heater (15) when current is flowing through the relay (50),
This power source is applied to the main heater (15) via the normally closed relay switch (51) and the triac (49).

Further, a fan motor (30) and a fan heater (32) are provided in parallel via a normally open relay switch (53) of the relay (52), and a fan heater (32) other than when the blower fan (31) is operating. ) Is arranged to block the operation of the fan motor (30) and the fan heater (32), and the fuse (54) and the triac (55) are connected in series to the fan heater (32), and the relay switch (53). When the fan heater (32) is operated via the triac (55), the fuse (54) is blown and the power supply to the fan heater (32) is improper. (56) is provided, and when no current flows through the fan heater (32) even when the fan heater (32) is operated, an abnormality alarm (error It is configured to stop the display) at the same time as bread operation.

Further, a voltage monitoring circuit (57) is provided for detecting when the power supply voltage (+ 5V) of the pan adjusting circuit (44) has dropped due to a power failure or the like, and a voltage (+4. 7V), the H level output from the monitor circuit (57) is applied to the non-inhibitable interrupt terminal (NMI) of the pan adjusting circuit (44). Then, at the end of the interrupt (NMI) control of the preparation circuit (44), the output terminal (P1) that produces the L level output is connected to the preparation circuit (57).
Connected to the standby terminal (STBY) of the
(MI) processing is performed to prepare for low-current-consumption operation (standby mode). Even if the time during which the power supply voltage drops due to load current changes, an interrupt (NM
I) It is configured to prevent the standby mode from being entered before the processing is completed.

Further, a monitoring timer (58) which is a control circuit for starting the low current consumption operation only when the voltage drop is maintained when the preparation for the low current consumption operation is completed is provided.
The L level output from the monitoring circuit (57) is monitored by the monitoring timer (5
8). The pan adjusting circuit (4) is connected via the delay circuit (59) and the backup capacitor (60).
The timer (5) is connected to the reset terminal (RESET) of 4).
8) is connected to the output, and the preparation circuit (44) is restored to normal by the timer (58) in response to a temporary voltage drop, and the bread making operation is continued, for example, a temporary voltage drop (+ 4.6V). Eliminates the inconvenience of stopping the CPU operation of the preparation circuit (44) because only the interrupt (NMI) process is performed by the above, and only the interrupt (NMI) and the standby mode process are performed by the temporary voltage drop (+ 4.4V). It is possible to return to normal even after the standby mode processing, and it is possible to prevent the stopping of the bread making operation due to noise and temporary voltage drop, and the timing such as preparation for low current consumption operation changes depending on the load current. It can be removed, and when there is a power outage, the preparation circuit (4
The low power consumption operation for operating only the memory (RAM) of 4) is performed, and when the power is supplied again, the bread making operation is performed from the state before the power failure.

This embodiment is constructed as described above, and is shown in FIG.
In that state, add bread ingredients such as flour, baking powder, seasonings, butter and water, and put baking powder on the upper side of the flour and water on the lower side to prevent the baking powder from getting wet. In order to set the baking time of the bread by operating the switch of the operation panel (3), when the bread is baked, the main heater (15) is intermittently operated in the preheating process as shown in FIG. Based on the output of the oven sensor (35) as in 5, the temperature is maintained at t1 degree or more to prevent the yeast from dying.

Further, the time required for bread making is calculated backward from the baking time of the bread and the bread making operation is started about 4 hours before. The blades (19) are rotated by the main motor (24) to make the baking case. The bread material in (16) is kneaded, and hot air or cold air is sent into the baking case (16) by the blower fan (31) and the fan heater (32), and based on the output of the dough sensor (28) as shown in FIG. The case (1
The temperature in 6) is maintained at t2 degrees, and the first stirring for m1 hour, the rest for m2 hours and the second stirring for M1 hour are performed.

Then, as shown in FIG. 7, an oven sensor (35)
Hold at t3 degree based on output, ferment M2 hours and m3
A rounding process of time is performed, and after the waiting time of M3 hours has passed, a rounding process of m4 hours and a roasting process of M4 hours are performed. In the process from preheating to roasting, the thermostat (36 ) Based on the output, it is confirmed that the temperature is t4 degrees or lower, and when the temperature rises to 60 degrees or higher at which the yeast is killed, an error display alarm is issued and the bread making operation is stopped.

Then, as shown in FIG. 9, the fabric sensor (28) is t
The main heater (15) is operated to bake the pan until the temperature of 5 degrees is detected or the baking time of M5 elapses, and at the same time, the fan motor (30) is operated to cool the pan for M6 hours to manufacture the pan. The detection of the thermostat (36) gives an error warning until the temperature falls to t4 degrees or below, thereby preventing the yeast bacteria from dying when the bread making operation is restarted.

Furthermore, the heat (5) of the fan heater (32)
When 4) is disconnected, the bread making operation is stopped, but t1
When the temperature is kept above the temperature, the bread making operation can be continued and only the error display can be displayed. When the power failure is a temporary voltage drop, the monitoring timer (58) detects this and the pan adjusting circuit (44) detects the temporary voltage drop.
After the low power consumption operation is prepared for the voltage drop such as the power failure, the low power consumption operation of the pan adjusting circuit (44) is started.

Further, at the final stage of the manufacturing process, each of the sensors (28) (35) and the thermostat (36).
It confirms that the multi-stage set temperature is detected, and performs a safety check to test whether it operates properly. The safety check program is set in advance in the memory surplus location of the bread preparation circuit (44). Then, the firing case (1
By the heating (air cooking) and cooling of 6), each sensor (28) (35) and thermostat (36) can perform a multi-step temperature check in the bread making operation in a shorter time (about 10 minutes) than the actual bread making operation. It is configured to
First, the fan motor (30) and the fan heater (32) are operated to gradually raise the temperature, and the oven sensor (35) as shown in FIG. 5 sets t1 degrees and the dough sensor (28) as shown in FIG. 6 sets t2 degrees. As shown in FIG. 7, the oven sensor (35) detects t3 degrees.

Next, the main heater (15) is operated to raise the temperature, and the thermostat (36) as shown in FIG.
9 to detect t4 degrees, the dough sensor (28) to detect t5 degrees, and the oven sensor (35) to detect t6 degrees (safety maximum temperature) as shown in FIG. 10, and operate the fan motor (30). To lower the temperature,
As shown in the figure, the oven sensor (35) measures t7 degrees.
As shown in Fig. 2, the oven sensor (35) measures t8 degrees,
As shown in FIG. 3, the thermostat (36) detects t9 degrees respectively, and the baking process (about 4 hours) of FIG. 4 is performed for a short time (about 4 hours) by the main heater (15) and the fan heater (32). It is shortened to 10 minutes and the safety check of the product in the manufacturing process is performed.

Note that m1 and m2 are 3 to 10 minutes, and m3 and m
4 for 1-5 seconds, M1-M6 for 10-100 minutes, t1, t
2, t3 is 20 to 40 degrees, t4 is a set temperature lower than the temperature at which yeasts die (around 60 degrees), and t5 is 90 to 1
10 degrees, t6 is 200 to 250 degrees, t7 and t8 are 150 degrees
-200 degrees, t9 is 40-60 degrees.

[0023]

As is apparent from the above embodiments, the present invention is provided with a baking case (16) in which bread ingredients are charged to carry out kneading, fermentation and baking, and the baking case (1
6) An apparatus for internally installing the oven (2), comprising means for detecting that the inside of the oven (2) is at or above a preset temperature set as the yeast killing temperature, and the means before starting the bread making operation. A means for giving an alarm when responding to the set temperature and a means for giving an alarm when the detecting means responds to the set temperature after the start of the bread making operation are provided. The subsequent temperature monitoring can be performed properly, safety and handling operability can be easily improved compared to the conventional one, and the temperature control function necessary for yeast can be easily improved. It has the practical effect of.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of a main part showing an embodiment of the present invention.

FIG. 2 is an overall front view.

FIG. 3 is a sectional side view.

FIG. 4 is a timing chart of a bread making operation.

FIG. 5 is a temperature measurement flowchart.

FIG. 6 is a temperature measurement flowchart.

FIG. 7 is a temperature measurement flowchart.

FIG. 8 is a temperature measurement flowchart.

FIG. 9 is a temperature measurement flowchart.

FIG. 10 is a temperature measurement flowchart.

FIG. 11 is a temperature measurement flowchart.

FIG. 12 is a temperature measurement flowchart.

FIG. 13 is a temperature measurement flowchart.

[Explanation of symbols]

 (2) Main body of oven (oven) (16) Baking case

Claims (1)

[Claims] 1. A device comprising a baking case in which bread ingredients are added to carry out kneading, fermentation and baking, and the baking case is internally provided in an oven, wherein the inside of the oven is equal to or higher than a set temperature set as a yeast killing temperature. And a means for issuing an alarm when the means responds to the set temperature before starting the bread making operation, and the detecting means responds to the set temperature after starting the bread making operation. A heating control device for a bread maker, which is provided with a means for issuing a warning when.