JP2578938B2 - Baking machine baking program - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the duty ratio of a heater in a baking process of a home bread maker.

2. Description of the Related Art A conventional method of controlling the duty ratio of a heater in a baking process of a bread maker of this type is as shown in FIG. 3, for example.

That is, as shown in FIG. 3, from the start of baking to the first peak temperature at which the control target temperature reaches the set first peak temperature, the duty ratio to the heater is set to a constant 100%. Was set to 0% while the temperature decreased to the next set temperature lower than the first peak temperature.

Problems to be Solved by the Invention However, such an energization control has a problem that overshoot and undershoot of the control target temperature with respect to a set temperature are large, and it is difficult to perform accurate temperature control.

In other words, the rate at which the temperature to be controlled rises until the temperature reaches the first peak temperature set in the firing step,
Because it is constant at a rate of 100% to the heater,
The temperature does not drop so much even when the temperature approaches the set temperature. As a result, the overshoot becomes large, and the rate at which the temperature to be controlled decreases from the first peak temperature to the next set temperature lower than the first peak temperature is determined by the heater. Since the power supply rate to the power supply was 0%, the undershoot with respect to the set temperature was increased due to the increase in speed.

In view of the above problems, the present invention divides the period from the start of firing to the first peak temperature at which the control target temperature is set into two or more sections in the firing step,
While the control target temperature is in the first section, the power supply rate to the heater is set to 100%, and then the control target temperature rises to the previous section and approaches the set first peak temperature. Is to reduce the overshoot with respect to the set first peak temperature.

Further, a second object of the present invention is to reduce the power supply rate to the heater while the temperature to be controlled reaches the first set peak temperature and then decreases to the next set temperature lower than the first set peak temperature. The purpose is to make the value larger than 0% to reduce the undershoot with respect to the set temperature.

Means for Solving the Problems In order to achieve the first object, a baking program for a bread maker according to the present invention includes a baking program that starts from the start of baking until the temperature reaches a first peak temperature at which a controlled object temperature is set. Is divided into two or more sections, and while the control target temperature is in the first section, the energization rate to the heater is set to 100%, and then the control target temperature rises to the previous section and reaches the first peak temperature set. As the distance approaches, the duty ratio to the heater is reduced to a lower value.

Further, in order to achieve the second object, the baking program of the bread maker of the present invention is configured such that after the temperature to be controlled reaches the set first peak temperature, the baking program is performed at a temperature lower than the first peak temperature. The energization rate to the heater while the temperature is lowered to the set temperature is made larger than 0%.

Operation According to the above configuration, in the baking step of the bread maker, the period from the start of baking to the first peak temperature at which the control target temperature is set is divided into two or more sections. During the section of
Since the control target temperature is set to 100%, the control target temperature can be quickly raised, and the control target temperature rises to a previous section from the control target temperature and approaches the set first peak temperature. Since the value is reduced to a value, the speed at which the temperature rises can be suppressed, and thereby the overshoot with respect to the first set peak temperature can be reduced.

Further, after the control target temperature reaches the set first peak temperature, the duty ratio to the heater is set to be larger than 0% while the temperature is lowered to the next set temperature lower than the first peak temperature. Therefore, the speed at which the temperature decreases can be suppressed, thereby reducing undershoot.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 2, reference numeral 1 denotes a base, and the base 1 has a motor 2 mounted on a lower surface and a firing chamber 3 mounted on an upper surface, respectively.
Further, the outer box 4, the bottom plate 5, and the legs 6 are fixed to the bottom surface, respectively. The firing chamber 3 has a heater 7 and a pedestal 8
Are fixed, and a supporting member 9 is provided outside the firing chamber 3.
The heat shield plate 10 is attached via the.

Further, an upper frame 11 is sandwiched and fixed between the outer box 4 and the support member 9, and a lid 12 is attached to the upper frame 11 so as to be openable and closable.

A lower bearing 13 is provided at a lower portion of the pedestal 8.
The main shaft 14 is rotatably supported on the main shaft 14.
The upper end portion of the main shaft 14 penetrates into the center of the firing chamber 3, a lower end of the connector 15 is provided at the end thereof, and a large pulley 16 is provided at a lower end portion of the main shaft 14. On the other hand, a small pulley 17 is provided on the rotating shaft of the electric motor 2, and the small pulley 17 is provided.
A belt 18 is hung between the 17 large pulleys 16,
The rotation of the electric motor 2 is transmitted to the main shaft 14.

Reference numeral 19 denotes a pan case, and a through hole is provided at the bottom of the pan case 19, and an upper bearing 20 is attached.
21 is rotatably supported. A connector 22 is fixedly attached to the lower end of the shaft 21.
A kneading blade 23 is detachably attached to an upper end portion of the 21.

The bread case 19 is detachably mounted on the pedestal 8 in the baking chamber 3, and the upper connector 22 is connected to the lower connector 22.
The fitting blade 15 rotates the kneading blade 23 with the rotation of the electric motor 2. Reference numeral 24 denotes a control circuit for controlling energization of the heater 7 and the electric motor 2 in accordance with a baking process.

When making bread with the bread maker having the above-described configuration, the bread case 19 is mounted on the pedestal 8 in the baking chamber 3, and bread ingredients such as flour and chic are put into the bread case 19 and started. The circuit 24 controls the energization of the electric motor 2 and the heater 7 according to the stored baking process.
The bread is automatically baked. That is, first, the small pulley 17, the belt 18, the large pulley 16,
The kneading blades 23 are rotated through the main shaft 14, the lower connector 15, the upper connector 22, and the shaft 21 to knead the dough, and the control circuit 24 detects the temperature of the pan case 19 with a temperature sensor (not shown) while heating the dough. The fermentation and baking of the dough is performed by controlling the power supply to 7 and controlling the temperature of the bread case 19.

FIG. 1 shows a program for controlling the temperature of the bread case 19 in the baking step in which the fermented bread dough is baked last. The vertical axis represents the pan case temperature, the horizontal axis represents time, and the temperature at the start of the firing step is a certain temperature in the course of reaching the first peak temperature.
The second peak temperature is the next set temperature lower than the first peak temperature. Below this, the energization rate to the heater 7 is shown, which is set to 100% for, 70% for, and 20% for, and thereafter, the heater 7 is maintained at a constant temperature. Is turned on and off.

 Next, the operation of the configuration of the above embodiment will be described.

In the baking process, the pan case temperature is controlled by increasing the temperature of the pan case 19 and quickly starting up because the energization rate to the heater 7 is 100% up to a temperature halfway up to the first peak temperature. This can prevent the bread skin from becoming too thick. Then, from that point to the first peak temperature, the energization rate to the heater 7 is 70%.
, The speed at which the temperature of the pan case 19 rises is suppressed. Thus, the overshoot of the temperature of the pan case 19 with respect to the set temperature can be reduced.

The first peak temperature is related to the baking color applied to the outer skin of the bread, and is generally set higher than the set temperature at which heat is passed through the inner layer thereafter.
When lowering the temperature of the pan case 19 from the first peak temperature to the next lower set temperature, the temperature of the pan case 19 decreases because the heater 7 is not turned off but is slightly heated at an energization rate of 20%. The speed can be suppressed, whereby the undershoot with respect to the set temperature can be reduced. Here, 20% of the duty ratio given as an example is based on the relationship between the heat quantity of the heater 7 and the heat capacity of the baking chamber 3 and the pan case 19, so that the temperature of the pan case 19 can be surely increased even when heated at the duty ratio. It is a value that decreases to the set temperature.

According to the present invention, as is apparent from the description of the above embodiment, the period from the start of firing to the first peak temperature at which the control target temperature is set is divided into two or more sections in the firing process. However, since the energization rate to the heater is set to 100% while the temperature to be controlled is in the first section, the temperature to be controlled can be raised quickly, and then the temperature to be controlled rises to the previous section and is set. Since the power supply rate to the heater is reduced to a lower value as the peak temperature approaches the first peak temperature, the rate at which the temperature rises can be suppressed. Overshoot with respect to the peak temperature can be reduced, and accurate temperature control can be performed.

Further, according to the present invention, after the control target temperature reaches the set first peak temperature, the power supply rate to the heater is reduced to 0% while the temperature falls to the next set temperature lower than the first peak temperature.
The temperature of the baking chamber can be reduced to reduce the rate at which the temperature drops, thereby reducing undershoot. It is possible to prevent it from falling too much while you are.

[Brief description of the drawings]

FIG. 1 is a firing pattern diagram of a bread maker showing one embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing the structure of the bread maker, FIG.
The figure is a firing pattern diagram of a conventional bread maker. 2 ... electric motor, 3 ... firing chamber, 7 ... heater, 19 ... pan case, 23 ... mixing blades, 24 ... control circuit.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Tatsuo Washizaki 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Hirofumi Nakakura 1006 Odaka Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. In-house (72) Inventor Shigeru Yamaguchi 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Michio Hiraoka 1006 Oji Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Person Takahiro Ohshita 1006 Kadoma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd.

Claims (2)

(57) [Claims] 1. A baking chamber heated by a heater, a pan case arranged in the baking chamber and containing bread material, a kneading blade for kneading the bread material in the pan case, and a drive of the kneading blade. In a baking process of a bread maker having an electric motor to be controlled and a control circuit for controlling the heater and the electric motor, two or more sections are provided from the start of baking until the temperature to be controlled reaches the first set peak temperature. When the temperature to be controlled is in the first section, the energization rate to the heater is set to 100%. From there, as the temperature to be controlled rises to the previous section and approaches the set first peak temperature, the heater is heated. Baking program for a baking machine that reduces the electricity supply rate to a lower value. 2. A baking chamber heated by a heater, a pan case installed in the baking chamber and containing bread material, a kneading blade for kneading the bread material in the pan case, and a drive of the kneading blade. In the baking process of a bread maker having an electric motor to be controlled and a control circuit for controlling the heater and the electric motor, after the control target temperature reaches the set first peak temperature, the control target temperature becomes lower than the first peak temperature. 0% duty ratio to the heater during the next lower set temperature
Baking machine for a baking machine with a larger size.