JPH053254B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of controlling a bread dough making machine.

(Prior technology) Conventional bread dough making machines include bread kneading machines that simply knead bread ingredients to make bread dough, and
As described in Japanese Patent No. 59-172586 and Japanese Utility Model Application No. 60-111678, bread making machines are known that perform the entire process from kneading bread ingredients to make bread dough to roasting the bread. However, all of these bread dough making machines are composed of a container containing flour, yeast, and other bread ingredients, a rotating blade that rotates inside the container to knead the bread ingredients, and a drive means that drives the rotating blade. ing. When making bread dough using these bread dough making machines, bread ingredients placed in a container are usually kneaded using rotary blades for a predetermined period of time.

(Problem to be Solved by the Invention) However, although the taste and other baking conditions of bread are significantly affected by the kneading condition of the bread dough, in conventional bread dough making machines, the time for kneading bread ingredients is This method is either set by the person making the dough or is preset in the bread dough making machine, so it requires some experience, and the quality of the dough tends to vary depending on the ingredients, ambient temperature, etc., making it difficult to bake bread that satisfies the taste. The problem was that it was difficult.

(Means for solving the problems) The present invention provides, as means for solving the problems, the following:
A method for controlling a bread dough making machine, comprising detecting the rotational speed of a driving means for driving rotary blades for kneading bread ingredients in a container, and stopping the driving means after fluctuations in the rotational speed reach a set value. It provides:

Further, the present invention provides, as a means for carrying out the method, a speed sensor that converts the rotation speed of the drive means for driving the rotary blades into an electrical signal, and a speed sensor that converts the rotation speed of the drive means using the output signal of the speed sensor. The present invention provides a control device comprising a control means for calculating the rotation speed and stopping the driving means after the rotation speed reaches a preset rotation speed corresponding to an optimal kneading state of the dough.

(Function) The present invention is based on the fact that there is a certain correlation between the kneading state of the bread dough and the change in the rotation speed of the driving means. During the initial stage, there is almost no fluctuation in the rotation speed, but as the kneading time progresses, the rotation speed will fluctuate, and as the kneading progresses to a certain extent, the amount of fluctuation in the rotation speed will increase; We focused on the fact that bread dough reaches its highest quality after a certain period of time has passed, and then gradually deteriorates.Furthermore, we focused on the fact that regardless of the type of flour, etc., the same tendency occurs at different times, and we decided to increase the rotation speed of the drive means. The kneading state of the bread dough is determined based on the variation in the number of revolutions, and after the number of revolutions reaches a preset number of revolutions, it is determined that the optimum kneading state has been reached and the driving means is stopped. This is what I did.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Example) Fig. 1 shows an automatic bread maker used to carry out the method of the present invention, 1 is a main body of the automatic bread maker, 2 is a lid attached to the main body 1 so as to be openable and closable and has a viewing window 2a;
3 is a material container that stores bread ingredients; 4 is a drive shaft that drives the rotary blade 5; 6 is a motor that drives the drive shaft 4 via pulleys 14, 16 and a drive belt 15; and 7 is a motor that increases the temperature inside the refrigerator. 8 is a fan that flows the air in the main body 1, 9 is a heater that heats the air circulated by the fan, 10 is a display and operation panel, Tr ₅ is a transistor that constitutes a voltage stabilization circuit, ZD is a stabilizing Zener diode, _C1 is a stabilizing capacitor, _C2 is a phase advance capacitor, D is a protection diode, PT is a power transformer, and 22 is a DC power supply circuit.

As shown in FIGS. 2 and 3, the control device 11 disposed inside the display/operation panel 10 has the following functions:
It consists of a microcomputer 12 as a control means, and is equipped with a photo interrupter 13 as a speed sensor.

As shown in FIG. 1, this photo interrupter 13 is arranged so as to sandwich a plane on which a protrusion 6b attached to the shaft 6a of the motor 6 rotates.
By blocking the optical path with the protrusion 6b, a pulse-like signal with a period corresponding to the rotation speed of the motor 6 is output.

Connected to the microcomputer 12 are a motor 6, a fan motor 8a, an internal heater 7, a fan heater 9, a buzzer 19, and temperature sensors that detect the material temperature and internal temperature, respectively.

The motor 6 and the fan motor 8a are connected to a commercial power source through the contacts of relays Ry ₂ and Ry ₁ , respectively, and each relay Ry ₁ and Ry ₂ is driven by driver transistors Tr ₁ and Tr ₂ , and the internal heater 7 And the fan heater 9 is connected to each tryack 20, 21.
A driver transistor Tr ₄ that turns on and off the
Driven by Tr ₃ .

When making bread dough using the automatic bread maker having the above configuration, the control device operates according to the flowchart shown in FIG. That is, first, flour, yeast, and other ingredients are placed in an ingredient container in order, and the container is set so that the yeast and water are isolated from other bread ingredients.
When the start switch SW ₁ is turned on, the process of kneading the bread ingredients begins.

In the kneading process, first, microcomputer 1
The signal from Tr 2 turns on transistor Tr ₂ , which energizes relay Ry ₂ , so
The drive circuit of the motor 6 is closed (step 1),
The motor 6 is turned on and the rotating blades 5 mix the bread ingredients. At the same time as the motor 6 rotates, a pulse-like signal corresponding to the rotation speed of the motor 6 is input from the photo interrupter 13 to the microcomputer 12, and the number of pulses N per unit time is inputted to the microcomputer 12.
is counted (step 2), and the number of pulses N
is the number of pulses at the optimal kneading state set in advance.
When N falls below ₀ (step 3), it starts counting the time (step 4) and starts a predetermined time t written in advance in the program memory (ROM) (usually
It is set within the range of 5 to 10 minutes. ), and when the predetermined time t has elapsed (step 5), the microcomputer 12 turns off the transistor _Tr2 , stops the rotation of the motor 6, and ends the kneading process.

If it is a bread kneading machine that simply kneads bread ingredients to make bread dough, the entire process will be completed with the above operations, but in the case of a bread machine that performs everything from kneading the dough to roasting, the program memory ( Each process such as primary fermentation, primary gas filling, secondary fermentation, secondary gas filling, molding fermentation, baking, and cooling is performed sequentially according to the program written in the ROM) while controlling the temperature. Since it is essentially the same as a conventional bread maker, the explanation will be omitted.

(Effects of the Invention) As is clear from the above description, according to the present invention, the degree of kneading of the dough is determined based on the rotational speed of the driving means, and the kneading operation is stopped when the optimum kneading state is reached. As a result, there will be no under-kneading or over-kneading depending on the type of bread ingredients used or the ambient temperature, and variations due to ingredients can be suppressed, making it possible to always obtain the best dough. Therefore, bread of the same quality and good taste can be made.

In addition, even if the rotation of the rotary blade is blocked by the fabric and the motor locks, this can be detected and the power to the motor can be immediately stopped, so there is no need to provide a large torque margin for the motor, and therefore a small motor can be used. This allows for downsizing and cost reduction of kneading machines and bread making machines.

Furthermore, by writing the fluctuation of the motor rotation speed according to the menu in the program memory (ROM) in advance, it is possible to automatically determine the menu of the automatic bread maker, which provides excellent effects. .

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of the automatic bread maker according to the present invention, Fig. 2 is a block diagram of its control device, Fig. 3 is its motor drive circuit diagram, and Fig. 4 is a flowchart of the control device in the kneading process. It is a diagram showing a chart. 1-Body of automatic bread maker, 2-lid, 3-material container, 4-drive shaft, 5-rotating blade, 6-motor (drive means), 7-interior heater, 8-fan, 9-for fan heater, 11 - control device, 12 - microcomputer, 13 - photo interrupter.

Claims (1)

[Claims] 1. Control of a bread dough making machine characterized by detecting the rotational speed of a driving means for driving rotary blades for kneading bread ingredients in a container, and stopping the driving means after fluctuations in the rotational speed reach a set value. Method.