JPH0729945Y2 - Automatic bread machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial field of application” The present invention relates to an automatic bread maker which can perform kneading, fermentation and baking steps continuously with time control and temperature control.

"Prior Art" Conventionally, kneading was performed by rotating a stirring blade with a stirring motor in a container into which bread ingredients were put.

"Problems to be solved by the invention" Since the stirring motor does not have a commercial power frequency switching tap, the original kneading performance is improved by changing the rotation speed of the motor in areas with different frequencies (50Hz or 60Hz, etc.). There is a problem that the function cannot be sufficiently exhibited even if the number of rotations of the motor is adjusted according to the amount and amount of the bread material in order to make good bread.

An object of the present invention is to provide an automatic bread maker capable of keeping the number of rotations of a stirring motor constant without having a frequency switching tap and changing the number of rotations of the motor as needed in areas where commercial power frequencies are different. It is in.

[Means for Solving Problems] In order to achieve the above-mentioned object, the automatic bread maker of the present invention is an automatic bread maker that can continuously perform each process of kneading, fermentation and baking with time control A control means for automatically determining the power supply frequency is provided, and an agitation motor for rotating the agitation blade inside the container is connected to the control means via an inverter circuit so that the agitation blade can be operated by the agitation motor even if the commercial power supply frequency changes. The rotation speed of the stirring motor is changed by rotating the stirring motor substantially constant, the speed changing means is connected to the control means, and the rotation speed of the stirring motor is switched by manual operation. Is.

"Operation" Therefore, even if an automatic bread machine is used in areas with different commercial power supply frequencies (50Hz or 60Hz, etc.), the rotation speed of the stirring motor can be kept constant by the inverter circuit control, and stable kneading performance can be obtained. At the same time, there is no variation in the rotation speed of the stirring motor due to the difference in commercial power supply frequency even when the rotation speed of the stirring motor is manually adjusted by the speed changing means in accordance with the type and amount of the bread material. The number of rotations can be adjusted, and good bread can be made while simplifying the control structure and operation and reducing the manufacturing cost.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. First
Fig. 2 is a control circuit diagram of the bread maker, and Fig. 2 is a sectional side view of the same. It is provided with a box-shaped main body case (2) supported by supporting legs (1) ... (3) is fitted and fixed, and the lid (4) which can be opened and closed is attached to the fulcrum shaft (3a) of the upper case (3).

The base frame (5) is internally fixed to the bottom of the main body case (2), the inner case (7) is fixedly mounted on the base frame (5) via the bearing plate (6), and the inner case (7) is fixed. An annular heat radiation heater (8) is attached to the inner circumference.

In addition, a bread baking case (9) having an upper opening cylindrical shape for introducing bread ingredients such as wheat flour and yeast and kneading, fermenting and baking is provided, and a pair of locking members that are engaged and disengaged by rotating the bread baking case (9). The base plates (11) at the bottom of the bread baking case (9) are detachably fixed to the bottom of the inner case (7) via the bearing plates (6) by the pieces (10a) and (10b).

Further, a bearing part (1
2) is formed, the upper rotating shaft (14) is supported by the bearing portion (12) through the metal (13), and the agitating motor (15) is fixedly mounted on the base frame (5) to form the belt (16). ) And the pulley (17a) (17b), the output shaft (1
8) The lower rotating shaft (19) of the bearing plate (6) is interlocked and connected, while the lower rotating shaft (14) lower end and the lower rotating shaft (19) upper end are disengageable clutch bodies (20a) (20b). Are engaged and connected by. Further, the shaft portion (22) of the stirring blade (21) is fitted from above onto the upper end of the rotary shaft (14) of the end face D type, and the stirring blade (21) is internally provided at the bottom portion of the bread baking case (9). .

Further, the upper surface of the upper case (3) and the upper surface of the lid (4) are substantially level with each other, and a glass window (23) having a spherical convex shape and a heat reflection film formed on the inner surface is provided in the center of the lid (4), and the glass window The heat reflection plate (24) is stretched on the inner surface of the lid (4) other than (23), and the upper end side of the bread baking case (9) is projected outside the upper surface opening of the main body case (2) to make bread baking. The upper end side of the case (9) is covered with a spherical surface of the heat reflection plate (24) inside the lid (4), and an intake hole (26) is formed on a side surface of the lid (4) through an intake guide (25). At the same time, the blower guide (29) is fixed inside the upper case (3), the blower motor (30) and the blower fan (31) are provided inside the main body and the upper case (2) (3), and the blower fan (31) is provided. Blower guide (29) blows air from the inside of the pan baking case (9) through the intake guide (25). It is configured to deliver towards.

The air blown from the fan (31) is the firing case (9).
The backflow prevention plate is provided with a blower guide plate (32) at the outlet of the intake hole (26) so as to blow out toward the inside, and prevents hot air and steam on the side of the firing case (9) from flowing in the direction of the fan (31). Install the (33) at the inlet of the intake hole (26), and install the fan (31).
The prevention plate (33) is opened by the pressure of the air to blow air.

Furthermore, a bread baking case (9) with a stirring blade (21)
A dough sensor (34) is provided on the bottom surface so as to be eccentric to the center of rotation of the stirring blade (21), and the heat transfer detection window (36) is provided by the base plate (11) through the heat insulating resin body (35). The bread baking case (9) is fixed to the bottom of the bread baking case (9).
The cloth sensor (34) is elastically supported from below the bottom part of the detection window (36) protruding inward so as to be able to move up and down.

Further, a ridge body (38) for preventing the clay-like bread material (dough) from rotating around with the blade (21) is fixed to the inner side surface of the baking case (9), and the outer circumference of the inner case (7) is insulated. Enclose with the body (39), and the operation panel (4
0) is installed.

An oven sensor (41), which is a temperature sensor, is fixedly installed in the main body case (2), and a menu switch (42) for selecting the type of bread (bread, French bread, etc.) is provided on the operation panel (40). , A reservation switch (43) (44) for setting the hour and minute of the baking time of the bread, a cancel switch (45) for resetting those initial settings, and a start switch (46) for starting bread making. And a pan adjustment circuit composed of a microcomputer (47)
Connect the switches (42) to (46) to
A seven-segment display (48) for displaying time and warning error is connected to the circuit (47).
Each of the sensors (34, 41) is connected to the circuit (47) via a changeover switch (67), and the changeover switch (67) is automatically changed over by the timer output of the circuit (47). 34) and (41) are configured to be input-connected according to the bread making process.

The thermostat (49) is connected to the circuit (47) as an input to detect whether or not the inside of the inner case (7) that constitutes the oven is below the yeast kill temperature (about 60 ° C). (49) is provided, and after the bread making reservation operation and before the bread making operation is started, an alarm such as an error display and the making of the bread making operation are stopped based on the excessive temperature output from the thermostat (49), while the bread making operation is finished. After that, an alarm such as an error display is given based on the excessive temperature output from the thermostat (49), and when the bread is continuously made, after the baking case (9) is cooled, the bread ingredients and the yeast are put, It is designed to prevent the death of yeast by high temperature.

Further, a DC power source (51) is applied to an agitating motor (15) driven by AC through an inverter circuit (50) for intermittently generating DC and alternating current using a semiconductor element as a switch, and a firing case (9) which is a container. ) In a kneading device provided with a stirring motor (15) for rotating a stirring blade (21) which is a rotating body, an adjusting circuit (47) which is a control means for automatically determining a commercial power frequency (50 Hz or 60 Hz) is provided. The agitating motor (15) is provided to the adjusting circuit (47) via the inverter circuit (50), and the commercial power frequency (50 Hz or
60 Hz) changes, the stirring motor (15) causes the stirring blade (21) to rotate substantially constant, and at the same time, the stirring motor (1
5) A rotation adjuster (5
2) is provided, and the regulator (52) is connected to the regulation circuit (47), for example, when one loaf of bread ingredients and two loaves of bread ingredients,
Alternatively, when a material requiring strong kneading is added, the adjuster (52) is manually operated to switch the rotation speed of the stirring motor (15).

Further, as shown in FIG. 1, the current sensor (53) for detecting the power supply to the heater (8) by the current flowing through the heater (8) and the operation of the heater (8) other than the heating timing in the bread making operation. And a triac (54) to prevent
A relay (55) which is a control means for turning off the heater (8) when a current is flowing through the heater (8) when the heating operation signal from the pan adjusting circuit (47) is off. The power source is applied to the heater (8) via the normally closed relay switch (56) of the relay (55) and the triac (54).

Further, the blower motor (30) is provided through the normally open relay switch (58) of the relay (57), and the adjusting circuit (4) is provided.
The buzzer (60) is connected to the output 7) via the amplifier (59).

This embodiment is constructed as described above, and bread ingredients such as the state shown in FIG. 2, wheat flour, yeast, seasonings, butter and water are added, yeast is on the upper side of the flour and water is on the lower side. This is to prevent yeast from getting wet by setting the bread baking time by operating the switch on the operation panel (40). When baking bread, as shown in Fig. 3, preheating step when making a reservation. The heater (8) is intermittently operated by and is kept at t1 degree or more based on the output of the oven sensor (41) to prevent the yeast from dying.

Further, the time required for bread making is calculated backward from the baking time and the bread making operation is started about 4 hours before, and the blade (21) is rotated by the stirring motor (15) to make the baking case (9). ) Bread ingredients are mixed and the blower fan (3
The air is sent into the baking case (9) by 1), the temperature in the case (9) is maintained at t2 degrees based on the output of the dough sensor (34), the first stirring of m1 hour and the rest of m2 hour and Allow the second agitation for M1 hours.

Then, based on the output of the oven sensor (41), it is maintained at t3 degrees, the fermentation for M2 hours and the rounding process for m3 hours are performed, and after the waiting time for M3 hours has passed, the rounding for m4 hours and the roasting for M4 hours are performed. In the process from preheating to roasting, it is confirmed that it is t4 degrees or less based on the output of the thermostat (49), and when the oven temperature rises above the temperature at which the yeast is killed, the error display Gives an alarm and stops the bread making operation.

Then, until the cloth sensor (34) detects t5 degrees, or
The heater (8) is operated until the baking time of M5 hours elapses, the bread is baked, and the fan motor (31) is operated to cool the M6 hours, and the baking is completed and the buzzer (58) is completed. Is operated, and during the bread making operation,
The output of the oven sensor (41) and the temperature data of the adjusting circuit (47) are compared to detect a plurality of internal temperatures (t1) (t3) (t7) of the inner case (7) to ferment and bake the bread. The operation is automatically and continuously performed.

In addition, in each of the steps of the first stirring, the second stirring, and each rounding, when the blade (21) is rotated by the stirring motor (15) to knead the bread ingredients in the baking case (9),
The adjustment circuit (47) determines the commercial power frequency (50Hz or 60Hz), and the adjustment circuit (47) determines the inverter circuit (50).
Control the stirring motor (1
5) is always kept almost constant, and when the bread ingredients are 1 loaf and 2 lobbies, or the bread ingredients in which the seasoning and the like are mixed in advance are added as the bread ingredients separately when used. At this time, the adjuster (52) is manually switched to change the rotation speed of the stirring motor (15) and the kneading force of the blade (21) is changed to an optimum state.

Also, after the bread is baked and the fan motor (31) blows air to dehumidify the inside of the inner case (7), an oven heater (8) is used to keep the temperature at about the body temperature (t4) for a certain time (M7). ) Operation control to prevent overcooling of the pan, while pressing the reservation switches (43) and (44) at the same time allows the warming operation to be performed manually, and the automatic and manual warming It is automatically stopped before the quality of the bread deteriorates, and the warming operation is performed to maintain the set temperature for the set time after the completion of the bread making operation.

[Effect of the Invention] As is clear from the above examples, the present invention is a control for automatically determining the commercial power supply frequency in an automatic bread maker that can continuously perform each process of kneading, fermentation and baking with time control. The means (47) is provided, and the control means (47) is connected to the stirring motor (15) for rotating the stirring blade (21) inside the container (9) via the inverter circuit (50), and the commercial power frequency is changed. Even if the stirring blade (21) is rotated substantially constant by the stirring motor (15), a speed changing means (52) for changing the rotation of the stirring motor (15) is provided, and the speed changing means (5) is provided.
2) is connected to the control means (47), and the speed change means (52) is manually operated to switch the rotation speed of the stirring motor (15). The commercial power frequency (50 Hz or
Even if you use an automatic bread machine in different areas (60Hz etc.),
By controlling the inverter circuit (50), the rotation speed of the stirring motor (15) can be kept constant, stable kneading performance can be obtained, and the rotation speed of the stirring motor (15) can be adjusted according to the type and amount of bread ingredients. Even when manually adjusting by the speed changing means (52), there is no variation in the rotation speed of the stirring motor (15) due to the difference in the frequency of the commercial power source, so that the stirring motor (15) is accurate.
The number of rotations can be adjusted, and good bread can be made while simplifying the control structure and operation and reducing the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a control circuit diagram of a bread maker showing an embodiment of the present invention, FIG. 2 is a side view of the same section, and FIG. 3 is a timing chart of the bread making operation. (9) ... Bread baking case (container) (15) ... Agitation motor (21) ... Agitation blade (47) ... Pan adjustment circuit (control means) (50) ... Inverter circuit (52) ... Rotation adjuster (transmission means)

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An automatic bread maker in which each step of kneading, fermentation and baking is continuously performed with time control, and a control means (47) for automatically determining a commercial power supply frequency is provided, and the control means (47). ) Is connected to a stirring motor (15) for rotating the stirring blade (21) inside the container (9) via an inverter circuit (50), and the stirring blade (15) causes the stirring blade (15) to rotate even if the commercial power frequency changes. A speed changing means (52) for changing the rotation of the stirring motor (15) is provided while rotating the (21) substantially constant, the speed changing means (52) is connected to the control means (47), and the speed changing means (52) is manually operated. 52) An automatic bread-making machine, characterized in that it is configured to operate the stirring motor (15) to change the rotation speed of the stirring motor (15).