JP5963154B2 - Automatic bread machine - Google Patents

Description

  The present invention relates to an automatic bread maker mainly used in general households.

  In recent years, automatic bread machines that produce bread directly from grains such as rice grains have become widespread. An example of this type of automatic bread maker is disclosed in Patent Document 1.

  The automatic bread maker of Patent Document 1 includes a blade rotation shaft provided at the bottom of a bread container, a grinding blade (also referred to as a mill blade) that is non-rotatable with respect to the blade rotation shaft, and a kneading blade (kneading blade) on the outer surface. And a dome-shaped cover provided with. The automatic bread maker of Patent Document 1 further includes a clutch that connects or disconnects the dome-shaped cover and the blade rotation shaft.

  In the automatic bread maker disclosed in Patent Document 1, when the blade rotation shaft is rotated in a state where the dome-shaped cover and the blade rotation shaft are disconnected from each other by the clutch, only the grinding blade rotates. The grains put in the bread container are pulverized by the rotation of the pulverizing blade (mill process). Thereby, the bread-making raw material is manufactured. On the other hand, when the blade rotation shaft is rotated in a state where the dome-shaped cover and the blade rotation shaft are connected by the clutch, the kneading blade rotates. By the rotation of the kneading blade, the bread-making raw material in the bread container and the auxiliary materials such as dry yeast are kneaded (kneading step). Thereby, bread dough is manufactured.

  The automatic bread maker of Patent Document 1 bakes and manufactures bread by baking the bread dough thus manufactured in a bread container.

  Further, in the automatic bread maker disclosed in Patent Document 1, a pulverizing motor for driving the pulverizing blade and a kneading motor for rotationally driving the kneading blade are separately provided. In such a configuration, in the milling process, the pulverization blade is rotated by a pulverization motor in a state where the cereal grains and water are placed in the bread container, so that a mixture of pulverized cereal grains and water (breadmaking) Raw material) is produced. Thereafter, in the kneading step, the kneading blade is rotationally driven by a kneading motor, whereby the mixture is kneaded to form bread dough. Then, bread is manufactured by performing a fermentation process and a baking process on the kneaded bread dough.

JP 2011-45414 A

  However, in the conventional automatic bread maker, a crushing motor that rotates the crushing blade and a mixed motor that rotates the kneading blade are provided separately. For this reason, there exists a subject that an apparatus is large.

  Moreover, in each process of a kneading process and a mill process, it is calculated | required to drive a motor more appropriately according to the state of bread dough. That is, it is required to operate the motor more appropriately during the bread production process.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and realize a miniaturization and a highly reliable automatic bread maker capable of operating a more appropriate motor in a bread production process. Is to provide.

  In order to achieve the above object, the present invention is configured as follows.

The automatic bread maker according to the present invention is an automatic bread maker for processing bread ingredients to produce bread,
A cooking container into which bread ingredients are charged;
A kneading blade and a mill blade which are rotatably provided in the cooking container;
A single motor that transmits rotational driving force to the kneading blade and the mill blade;
An inverter device for controlling rotation by a motor,
The inverter device transmits the rotational driving force of the motor to the mill blade and mills the bread ingredients by rotating the mill blade, and transmits the rotational driving force of the motor to the kneading blades and rotates the kneading blade to produce the bread ingredients. The rotation of the motor is controlled so that the kneading step for kneading is performed, and different rotation control is performed in the kneading step and the milling step.

  As a result, it is possible to realize a highly reliable automatic bread maker that can achieve downsizing and can perform more appropriate motor operation in the kneading process and the milling process.

Moreover, the automatic bread maker according to the present invention is an automatic bread maker for processing bread ingredients to produce bread,
A cooking container into which bread ingredients are charged;
A kneading blade provided rotatably in the cooking container;
A motor that transmits rotational driving force to the kneading blades;
An inverter device for controlling rotation by a motor,
The inverter device controls the rotation of the motor so as to carry out a kneading process in which the rotation driving force of the motor is transmitted to the kneading blade and the kneading blade is kneaded by the rotation of the kneading blade, and the rotation speed for controlling the rotation speed of the motor With control means,
The rotation speed control means has a function of controlling the rotation speed of the motor in the kneading process so as to be a target rotation speed calculated by a control calculation including differential control.

  Thereby, it is possible to realize a highly reliable automatic bread maker that can perform more appropriate motor operation particularly in the kneading process.

  ADVANTAGE OF THE INVENTION According to this invention, the reliable automatic bread maker which can perform the driving | operation of a more suitable motor in the production | generation process of a bread | pan can be implement | achieved.

1 is a perspective view of an automatic bread maker according to an embodiment of the present invention. It is a perspective view which shows the state which opened the cover body of the automatic bread maker of FIG. It is sectional drawing of the automatic bread maker of FIG. It is sectional drawing which shows the structure of the components relevant to the inverter motor of the automatic bread maker of FIG. It is a perspective view of the blade | wing unit with which the automatic bread machine of FIG. 1 is provided. FIG. 5 is a cross-sectional view showing components that similarly rotate in the forward direction when the output shaft of the inverter motor in FIG. 4 rotates in the forward direction. FIG. 5 is a cross-sectional view showing components that similarly rotate in the reverse direction when the output shaft of the inverter motor in FIG. 4 rotates in the reverse direction. It is a schematic block diagram which shows schematic structure of the drive circuit of the automatic bread maker of FIG. It is a transition diagram showing an example of the rotation speed of an inverter motor and the change of an electric current in the kneading process of the automatic bread maker of FIG. FIG. 2 is a transition diagram showing an example of changes in motor rotation speed and current in a kneading process by PI control that omits differential control of the drive circuit of the automatic bread maker shown in FIG. 1. It is a transition diagram showing an example of the rotation speed of an inverter motor and the change of an electric current in the mill process of the automatic bread maker of FIG. It is a transition diagram showing an example of transition of the output voltage of the inverter part in the mill process and kneading process of the automatic bread maker of FIG.

The first invention is an automatic bread maker for processing bread ingredients to produce bread,
A cooking container into which bread ingredients are charged;
A kneading blade and a mill blade which are rotatably provided in the cooking container;
A single motor that transmits rotational driving force to the kneading blade and the mill blade;
An inverter device for controlling rotation by a motor,
The inverter device transmits the rotational driving force of the motor to the mill blade and mills the bread ingredients by rotating the mill blade, and transmits the rotational driving force of the motor to the kneading blades and rotates the kneading blade to produce the bread ingredients. This is an automatic bread maker that controls the rotation of the motor so as to carry out the kneading process for performing kneading and different rotation control in the kneading process and the milling process.

  As a result, it is possible to achieve downsizing and to perform more appropriate motor operation by performing different rotation control (rotation speed, rotation direction, control method, etc.) in the kneading process and the mill process. A high automatic bread machine can be realized.

  In a second aspect of the invention, in particular, in the first aspect of the invention, the inverter device has a function of changing the rotation direction of the motor in the kneading step and the milling step.

  Thus, more appropriate motor operation can be performed in the kneading step and the milling step.

  In the third invention, in particular, in the first or second invention, the inverter device has a function of changing the rotation speed of the motor in the kneading step and the milling step.

  Thus, more appropriate motor operation can be performed in the kneading step and the milling step.

  In a fourth aspect of the invention, in particular, in the third aspect of the invention, the inverter device sets the rotational speed of the motor in the mill process to be higher than the rotational speed of the motor in the kneading process.

  Thereby, the mill operation of the bread raw material in the mill process can be performed more reliably, and the reliability can be improved.

In a fifth aspect of the invention, in particular, in any one of the first to fourth aspects of the invention, the inverter device includes a rotational speed control means for controlling the rotational speed of the motor,
The rotation speed control means has a function of controlling the rotation speed of the motor in the kneading process so as to be a target rotation speed calculated by a control calculation including differential control.

  Thus, by performing control by differential control with respect to fluctuations in the rotational speed in the kneading process, it is possible to perform more appropriate motor operation particularly in the kneading process.

In a sixth aspect of the invention, in particular, in the fifth aspect of the invention, the inverter device includes current control means for controlling a current supplied to the motor.
The rotation speed control means outputs the target current value calculated by the current control means, thereby controlling the rotation speed of the motor in the kneading step to be the target rotation speed.

  This makes it possible to operate the motor more appropriately in the kneading process.

  In a seventh aspect of the invention, in particular, in the sixth aspect of the invention, the inverter device includes current detection means for detecting a current value supplied to the motor using the voltage across the protective resistance provided in the inverter device. The current value detected by the current detection means is output to the current control means.

  Thus, more appropriate motor operation can be performed by reliably detecting the motor current at low cost.

  In an eighth aspect of the invention, in particular, in any one of the fifth to seventh aspects of the invention, the rotational speed control means calculates the rotational speed of the motor in the mill process by a control calculation including proportional control and integral control. It has a function of controlling to reach the target rotational speed.

  As a result, a kneading process in which the rotational speed of the motor is stable is performed, and the reliability can be improved.

A ninth invention is an automatic bread maker for processing bread ingredients to produce bread,
A cooking container into which bread ingredients are charged;
A kneading blade provided rotatably in the cooking container;
A motor that transmits rotational driving force to the kneading blades;
An inverter device for controlling rotation by a motor,
The inverter device controls the rotation of the motor so as to carry out a kneading process in which the rotation driving force of the motor is transmitted to the kneading blade and the kneading blade is kneaded by the rotation of the kneading blade, and the rotation speed for controlling the rotation speed of the motor With control means,
The rotation speed control means is an automatic bread maker having a function of controlling the rotation speed of the motor in the kneading process so as to be a target rotation speed calculated by a control calculation including differential control.

  This makes it possible to realize a highly reliable automatic bread maker that can perform more appropriate motor operation particularly in the kneading process.

In a tenth aspect of the invention, in particular, in any one of the first to ninth aspects of the invention, the tenth aspect of the invention further includes a driving force switching unit that switches a transmission path of the rotational driving force of the motor to the mill blade and the kneading blade,
The driving force switching unit switches whether to transmit the rotational driving force of the motor to the mill blades, or to the kneading blades, or to both the kneading blades and the mill blades, according to the rotation direction of the motor,
The driving force switching unit includes first and second one-way clutches,
The first one-way clutch allows the reverse rotation of the mill blade when the motor rotates in the reverse direction, while restricting the rotation of the mill blade in the positive direction when the motor rotates in the forward direction.
The second one-way clutch rotates the kneading blade when the motor rotates in the forward direction, while rotating the kneading blade so that the kneading blade does not rotate in the reverse direction when the motor rotates in the reverse direction. regulate.

  As a result, the transmission path of the rotational driving force of the inverter motor can be switched more reliably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment)
An overall configuration of an automatic bread maker according to an embodiment of the present invention will be described. FIG. 1 is a perspective view of an automatic bread maker according to the present embodiment, and FIG. 2 is a perspective view showing a state where a lid of the automatic bread maker according to the present embodiment is opened. FIG. 3 is a sectional view of the automatic bread maker according to the present embodiment. FIG. 4 is a cross-sectional view showing the configuration of components related to the motor of the automatic bread maker according to the present embodiment.

  1 to 3, the automatic bread maker 1 according to the present embodiment includes a device body 10 having a substantially rectangular parallelepiped shape. An operation unit 20 is provided on a part of the upper surface of the device main body 10.

  The operation unit 20 includes an operation key group and a display unit. The operation key group includes, for example, a start key, a cancel key, a timer key, a reservation key, a selection key for selecting a cooking course for bread, and the like. The cooking course includes, for example, a course for manufacturing bread using rice grains as a starting material, a course for manufacturing bread using rice flour as a starting material, a course for manufacturing bread using wheat flour as a starting material, and the like. The display unit is composed of, for example, a liquid crystal display panel and displays time, contents set by the operation key group, errors, and the like.

  The main components of the whole are a cooking container 40 into which bread ingredients are charged, a kneading blade 84 and a mill blade 82 rotatably provided in the cooking container 40, and a rotational driving force on the kneading blade 84 and the mill blade 82. And an inverter device 200 (to be described later) that controls the rotation of the motor 70 in the kneading process and the milling process in the bread-making process. The inverter device 200 performs different rotation control in the kneading process and the milling process.

  A firing chamber 30 is provided inside the apparatus main body 10. The baking chamber 30 is formed in a box shape with an upper surface opened. A cooking container 40 for storing cooking materials such as bread dough, cake, and rice cake is detachably stored in the baking chamber 30.

  Moreover, inside the baking chamber 30, as shown in FIG. 3, it is an example of the sheathed heater 31 which is an example of the heating part which heats the cooking container 40, and the temperature detection part which detects the temperature in the baking chamber 30. A temperature sensor 32 is provided.

  The sheathed heater 31 is arranged so as to surround the lower part of the cooking container 40 accommodated in the baking chamber 30 with a gap. The temperature sensor 32 is arranged at a position slightly away from the sheathed heater 31 so that the average temperature in the baking chamber 30 can be detected.

  The upper surface opening of the baking chamber 30 is opened and closed by a lid 50 provided on the upper part of the device main body 10. The lid 50 is rotatably attached to a hinge portion 10A provided at the upper rear portion (upper right side in FIG. 3) of the device main body 10. The lid 50 includes a lid body 51 and an outer lid 52. The lid main body 51 is attached with a secondary material container 53 for storing powdery secondary materials such as gluten and dry yeast, and a secondary material container 54 for storing secondary materials having a relatively large volume such as raisins and nuts. Yes. The auxiliary material containers 53 and 54 are disposed above the cooking container 40. The outer lid 52 is attached so that the upper openings of the auxiliary material containers 53 and 54 can be opened and closed.

  The bottom wall of the auxiliary material container 53 is configured by an opening / closing plate 53a. The opening / closing plate 53 a is configured to be rotatable so that the auxiliary material in the auxiliary material container 53 can be put into the cooking container 40. Similarly, the bottom wall of the auxiliary material container 54 is constituted by an opening / closing plate 54a. The opening / closing plate 54 a is configured to be rotatable so that the auxiliary material in the auxiliary material container 54 can be put into the cooking container 40. The opening / closing timing of the opening / closing plates 53a, 54a is controlled by the control unit 90 described later.

  A cooking container support 11 is provided at a substantially central portion of the bottom wall 30 a of the baking chamber 30. As shown in FIG. 4, the cooking container support portion 11 is formed in a substantially cylindrical shape and has an inner diameter that gradually decreases as the distance from the bottom wall 30 a of the baking chamber 30 decreases. A first pulley 61 is provided via a bearing 12 at the lower end of the outer peripheral surface of the cooking container support 11.

  A substantially cylindrical third one-way clutch 13 is provided in the central hole at the bottom of the cooking vessel support 11. A substantially cylindrical body-side kneading shaft 16A is provided inside the third one-way clutch 13 so as to extend in the vertical direction. The third one-way clutch 13 allows rotation of the main body side kneading shaft 16A in the forward direction (for example, clockwise) while restricting rotation of the main body side kneading shaft 16A in the reverse direction (for example, counterclockwise). It is configured.

  A second one-way clutch 15 is provided at the lower outer periphery of the main body side kneading shaft 16A. The second one-way clutch 15 is provided to engage with the first pulley 61. When the first pulley 61 rotates in the forward direction, the second one-way clutch 15 rotates the main body side kneading shaft 16A in the forward direction, while the first pulley 61 rotates in the reverse direction. The rotation of the main body side kneading shaft 16A is restricted so that the shaft 16A does not rotate in the reverse direction.

  A substantially cylindrical body-side mill shaft 14A is provided inside the body-side kneading shaft 16A so as to extend in the vertical direction. The main body side mill shaft 14A is provided to be rotatable relative to the main body side kneading shaft 16A. A second pulley 62 is fixed to the lower end portion of the main body side mill shaft 14A.

  In addition, an inverter motor 70 which is an example of a motor is provided outside the baking chamber 30 and inside the apparatus main body 10. The inverter motor 70 is a motor that can freely change the rotation speed and rotation direction (forward direction, reverse direction) of the output shaft 71 per unit time.

  A third pulley 63 is fixed to the upper periphery of the output shaft 71 of the inverter motor 70. A first belt 65 is wound around the third pulley 63 and the first pulley 61. When the inverter motor 70 is driven and the output shaft 71 rotates, the rotational force of the output shaft 71 is transmitted to the first pulley 61 via the third pulley 63 and the first belt 65.

  In addition, a fourth pulley 64 is provided via a bearing 67 at the lower outer periphery of the output shaft 71 of the inverter motor 70. A second belt 66 is wound around the fourth pulley 64 and the second pulley 62.

  In addition, a first one-way clutch 68 is provided between the third pulley 63 and the fourth pulley 64 on the outer peripheral surface of the output shaft 71 of the inverter motor 70. The first one-way clutch 68 rotates the fourth pulley 64 in the reverse direction when the output shaft 71 rotates in the reverse direction, while the fourth pulley 64 rotates in the normal direction when the output shaft 71 rotates in the forward direction. The rotation of the fourth pulley 64 is restricted so as not to rotate in the direction.

  A main body side connector 17A is fixed to the upper end portion of the main body side mill shaft 14A. The main body side connector 17A is configured to be engageable with a container side connector 17B fixed to a lower end portion of a substantially cylindrical container side mill shaft 14B. When the main body side mill shaft 14A rotates with the main body side connector 17A and the container side connector 17B engaged, the container side mill shaft 14B rotates.

  Further, an engagement piece 16Aa is provided at the upper end of the main body side kneading shaft 16A. The engagement piece 16Aa is configured to be engageable with an engagement piece 16Ba fixed to the lower end portion of the substantially cylindrical container side kneading shaft 16B. When the main body side kneading shaft 16A rotates, the engaging piece 16Aa engages with the engaging piece 16Ba, and the container side kneading shaft 16B rotates.

  The container side mill shaft 14B is provided inside the container side kneading shaft 16B via a cylindrical bearing 18. The container-side mill shaft 14B and the container-side kneading shaft 16B protrude into the cooking container 40 through a through hole provided at the center of the bottom of the cooking container 40 when the cooking container 40 is set in the baking chamber 30. It is provided as follows.

  As shown in FIG. 3, a bottomed cylindrical recess 41 is formed at the bottom of the cooking container 40. Moreover, the cylindrical base 42 is provided in the bottom outer surface of the cooking container 40 so that the container side kneading shaft 16B may be surrounded. The cooking container 40 is set in the baking chamber 30 by placing the base 42 on the cooking container support 11 and engaging the main body side connector 17A and the container side connector 17B. On the other hand, the cooking container 40 can be removed from the baking chamber 30 by disengaging the main body side connector 17A and the container side connector 17B. The pedestal 42 may be formed separately from the cooking container 40 or may be formed integrally with the cooking container 40.

  A blade unit 80 is detachably attached to portions of the container-side mill shaft 14B and the container-side kneading shaft 16B that protrude into the cooking container 40.

  The blade unit 80 includes a cap 81, a mill blade 82, a dome-shaped cover 83, a kneading blade 84, and a safety cover 85. Here, in the following description, the mill blade 82 and the kneading blade 84 may be referred to as blades.

  The cap 81 is detachably provided at the tip of the container side mill shaft 14B. The mill blade 82 is provided so as to protrude outward from the outer peripheral surface of the cap 81. The mill blade 82 is a blade for pulverizing grain grains such as rice grains to produce a bread-making material. In a state where the cooking container 40 is set in the baking chamber 30 and the cap 81 is attached to the container-side mill shaft 14B, the mill blade 82 is provided so as to be generally located in the recess 41 of the cooking container 40. .

  The dome-shaped cover 83 is formed so as to cover the mill blade 82 from above. FIG. 5 is a perspective view of a blade unit provided in the automatic bread maker according to the embodiment of the present invention. As shown in FIG. 5, the dome-shaped cover 83 is provided with a plurality of window portions 83 a that connect the space inside the dome-shaped cover 83 and the space outside the dome-shaped cover 83. The bread-making raw material produced by the rotation of the mill blades 82 is discharged to the space inside the dome-shaped cover 83 and the space outside the dome-shaped cover 83 through the plurality of windows 83a.

  The kneading blades 84 are provided so as to stand vertically on the outer surface of the dome-shaped cover 83. The kneading blades 84 are blades for producing bread dough by kneading the bread-making ingredients in the cooking container 40.

  The safety cover 85 is attached to the lower end portion of the dome-shaped cover 83 and is formed so as to cover the mill blade 82 from below. The safety cover 85 is attached to the container-side kneading shaft 16B so that a part of the safety cover 85 is fitted to the inner surface of the container-side kneading shaft 16B. When the container-side kneading shaft 16B rotates, the safety cover 85, the dome-shaped cover 83, and the kneading blade 84 rotate integrally. In a state where the cooking container 40 is set in the baking chamber 30 and the safety cover 85 is attached to the container-side kneading shaft 16B, the mill blade 82 is provided so as to be generally positioned above the recess 41 of the cooking container 40. It has been. In addition, the safety cover 85 is provided with an opening (not shown) for taking materials such as rice grains and water put in the cooking container 40 into the dome-shaped cover 83.

  A control unit 90 that controls driving of each unit is provided below the operation unit 20 of the device main body 10. The control unit 90 stores cooking sequences corresponding to a plurality of cooking courses. In the cooking sequence, when each manufacturing process such as water immersion, milling, cooling, kneading, fermentation, and baking is performed in order, the energizing time of the sheathed heater 31, the temperature adjustment temperature, the rotation direction of the inverter motor 70, and the rotation speed in each manufacturing process. A cooking procedure program in which the opening and closing timings of the opening and closing plates 53a and 54a are determined in advance. The control unit 90 controls driving of the inverter motor 70, the sheathed heater 31, and the opening / closing plates 53 a and 54 a based on the cooking sequence corresponding to the specific cooking course selected by the operation unit 20 and the temperature detected by the temperature sensor 32. To do.

  Next, the operation when the output shaft 71 of the inverter motor 70 is rotated in the forward direction will be described with reference to FIG. FIG. 6 is a cross-sectional view showing components that similarly rotate in the forward direction when the output shaft of the motor in FIG. 4 of the automatic bread maker in the embodiment of the present invention rotates in the forward direction. In FIG. 6, the hatched portion indicates a component that rotates in the positive direction.

  As shown in FIG. 6, when the output shaft 71 of the inverter motor 70 is rotated in the forward direction, the rotational force of the output shaft 71 is transmitted to the third pulley 63 and the first one-way clutch 68, and these components. Rotates in the positive direction.

  The rotational force of the third pulley 63 is transmitted to the first belt 65, the first pulley 61, and the second one-way clutch 15, and these components rotate in the forward direction. The second one-way clutch 15 rotates the main body side kneading shaft 16A in the forward direction because the first pulley 61 rotates in the forward direction. At this time, the third one-way clutch 13 allows rotation of the main body side kneading shaft 16A in the positive direction. The rotational force of the main body side kneading shaft 16A is transmitted to the container side kneading shaft 16B, the safety cover 85, the dome-shaped cover 83, and the kneading blade 84, and these components rotate in the forward direction.

  On the other hand, since the output shaft 71 rotates in the forward direction, the first one-way clutch 68 restricts the rotation of the fourth pulley 64 so that the fourth pulley 64 does not rotate in the forward direction.

  That is, when the output shaft 71 of the inverter motor 70 is rotated in the forward direction, the milling blade 84 rotates in the forward direction, while the mill blade 82 does not rotate.

  Next, the operation when the output shaft 71 of the inverter motor 70 is rotated in the reverse direction will be described with reference to FIG. FIG. 7 is a cross-sectional view showing components that similarly rotate in the reverse direction when the output shaft of the motor of FIG. 4 of the automatic bread maker in the embodiment of the present invention rotates in the reverse direction. In FIG. 7, the hatched portion indicates a component that rotates in the reverse direction.

  As shown in FIG. 7, when the output shaft 71 of the inverter motor 70 is rotated in the reverse direction, the rotational force of the output shaft 71 is transmitted to the third pulley 63 and the first one-way clutch 68, and these components. Rotates in the opposite direction.

  The rotational force of the third pulley 63 is transmitted to the first belt 65, the first pulley 61, and the second one-way clutch 15, and these components rotate in the reverse direction. Since the first pulley 61 rotates in the reverse direction, the second one-way clutch 15 restricts the rotation of the main body side kneading shaft 16A so that the main body side kneading shaft 16A does not rotate in the reverse direction.

  On the other hand, since the output shaft 71 rotates in the reverse direction, the first one-way clutch 68 rotates the fourth pulley 64 in the reverse direction. The rotational force of the fourth pulley 64 is transmitted to the second belt 66, the second pulley 62, the main body side mill shaft 14A, the container side mill shaft 14B, the cap 81, and the mill blade 82, and these components are reversed. Rotate in the direction. At this time, the third one-way clutch 13 restricts rotation of the main body side kneading shaft 16A in the reverse direction (so-called co-rotation) by the rotational force of the main body side mill shaft 14A.

  That is, when the output shaft 71 of the inverter motor 70 is rotated in the reverse direction, the mill blade 82 rotates in the reverse direction while the kneading blade 84 does not rotate.

  In the present embodiment, the first pulley 61 is configured to have a larger diameter than the second pulley 62 to the fourth pulley 64. As a result, the rotational speed of the kneading blade 84 relative to the rotational speed of the output shaft 71 of the inverter motor 70 is reduced (for example, 250 rpm), and a high torque is obtained. Further, the rotational speed of the mill blade 82 relative to the rotational speed of the kneading blade 84 is set to a high speed (for example, 4000 rpm).

  In the present embodiment, the “mill shaft” is constituted by a main body side mill shaft 14A and a container side mill shaft 14B which are connected by engaging the main body side connector 17A and the container side connector 17B. . The “kneading shaft” is constituted by a main body side kneading shaft 16A and a container side kneading shaft 16B which are connected by engaging the engaging pieces 16Aa and the engaging pieces 16Ba. Further, the center axis of the mill shaft that becomes the rotation center of the mill blade 82 and the center axis of the kneading shaft that becomes the rotation center of the kneading blade 84 are provided on the same axis.

  In the present embodiment, the “driving force switching unit” includes the bearings 12, 67, the first to fourth pulleys 61 to 64, the first and second belts 65 and 66, and the first to third one-way clutches. 68, 15, and 13. The “driving force switching unit” switches the transmission path of the rotational driving force of the inverter motor 70 to the mill blade and the kneading blade. That is, depending on the direction of rotation of the inverter motor 70 (output shaft thereof), the motor rotational driving force is switched to be transmitted to the mill blade, or to the mixing blade, or to both the mixing blade and the mill blade.

  FIG. 8 is a diagram illustrating a schematic configuration of a drive circuit including an inverter device 200 provided in the control unit 90 in the automatic bread maker according to the present embodiment. The AC power supplied from the AC power supply 101 is temporarily converted to DC by the rectifier circuit 102 and the smoothing capacitor 103 provided in the inverter device 200. Thereafter, the DC power is supplied to the inverter unit 104 including switching elements 400-405 in which free-wheeling diodes 410 to 415 are provided in parallel. The inverter unit 104 has a three-phase series circuit including switching elements 400, 402, and 404 on the upper arm side and switching elements 401, 403, and 405 on the lower arm side. An interconnection point between the upper arm and the lower arm in these series circuits is connected to an inverter motor 70 (see also FIG. 3 and the like) as a load. In addition, a blade unit 80 composed of kneading blades 84 and mill blades 82 is connected to the inverter motor 70 as a load of the inverter motor 70 (see also FIGS. 6 and 7 and the like). Further, protective resistors 416-418 are provided between the switching elements 401, 403, and 405 on the lower arm side and one end on the low potential side of the direct current portion through which a direct current is passed. The current flowing through the inverter motor 70 is detected by measuring the voltage across the protective resistors 416-418.

  The inverter device 200 includes a control unit 108 configured by a microcomputer and an analog circuit. The control means 108 adjusts the AC power output from the inverter unit 104 by controlling the switching of the switching elements 400-405 using an internal timer function or the like, and a desired rotational speed along a predetermined sequence. Inverter motor 70 is rotated. As a switching method, a general pulse width modulation (PWM) method in which the output voltage is controlled by the time width of the drive pulse of the switching element can be used. As the switching elements 400-405, a device capable of high-speed switching such as an IGBT can be used. When the control means 108 outputs the switching pattern of the switching elements 400-405 by pulse width modulation (PWM), an alternating current output to the inverter motor 70 is created in the inverter unit 104.

  The inverter device 200 having the above-described configuration controls the operation of the automatic bread maker so that the inverter motor 70 and the blade unit 80 rotate at a desired number of rotations. Thereby, the bread | pan production | generation function by the automatic bread maker concerning this embodiment is implement | achieved.

  Next, each component of the control means 108 will be described. The control means 108 includes a current detection means 801, a driver 802, a rotation speed control means 803, a current control means 804, a voltage output means 805, a rotation speed calculation means 806, and a bread making control means 808.

The bread making control means 808 outputs the target rotational speed ω ^* of the inverter motor 70 corresponding to the time from the bread making start time in each of the kneading process and the mill process in accordance with a predetermined bread making sequence. . The rotation speed calculation means 806 calculates the actual rotation speed ω of the inverter motor 70 by calculating the speed of change of the rotation angle from the detected value of the rotation angle of the inverter motor 70 detected by the rotation angle sensor 107.

Next, the operation of the rotation speed control means 803 in the control means 108 will be described. The rotation speed control means 803 has information on the error between the actual rotation speed ω of the inverter motor 70 obtained by the rotation speed calculation means 806 and the target rotation speed ω ^* given from the outside (breadmaking control means 808). In addition, a predetermined control calculation is performed. Specifically, a control calculation is performed to output a command value I ^{* of the} current to be passed through the inverter motor 70 so that the actual rotation speed of the inverter motor 70 matches the target rotation speed. The calculation method is switched between the kneading process and the milling process. A calculation method in each step will be described.

(Control calculation in the mill process)
In the mill process, the control calculation is performed by the PI control method based on proportional control and integral control shown in the following formula 1.

I ^* = Gpω × (ω ^* −ω) + Giω × Σ (ω ^* −ω) (Formula 1)
Here, Gpω, Giω: Speed control proportional gain, integral gain
ω: actual rotational speed, ω ^* : target rotational speed
I ^* : Current command value (Σ represents time integration)

The current command value I ^* for realizing the target rotational speed ω ^* in the mill process is calculated by the control calculation by this PI control method.

In accordance with the current command value I ^* , the current control unit 804 calculates an output voltage output to the voltage output unit 805. Specifically, the current detection unit 801 detects the current value flowing through the inverter motor 70 from the measured value of the voltage across each of the protection resistors 416-418. Using the information on the difference between the current value I detected by the current detection means 801 and the current command value I ^* output by the rotation speed control means 803, the current control means 804 performs a control calculation according to the following equation 2. Do. As a result, the current control unit 804 calculates the output voltage value V to be output to the voltage output unit 805.

V = GpI × (I ^* −I) + GiI × Σ (I ^* −I) (Formula 2)
Where V: Output voltage value
GpI, GiI: Current control proportional gain, integral gain
I: Actual current value, I ^* : Current command value (Σ represents time integration)

Next, the voltage output means 805 realizes the output voltage value V in the inverter unit 104 from the output voltage value V calculated by the current control means 804 and information on the rotation angle of the inverter motor 70 detected by the rotation angle sensor 107. To output a pulse pattern signal to the driver 802. The pulse pattern signal output by the voltage output means 805 here is calculated using the output voltage value V and the rotation angle of the inverter motor 70 so that the output waveform of the voltage becomes a desired sine wave. Driver 802 outputs a signal for driving switching elements 400-405 to inverter unit 104 in accordance with the pulse pattern signal. By controlling the inverter unit 104 in this way, the inverter motor 70 is driven according to the output voltage value V. Thereby, the actual rotational speed of the inverter motor 70 is maintained at the target rotational speed ω ^* .

Through the control as described above, in the mill process, the inverter motor 70 and the blade unit 80 connected to the inverter motor 70 can be rotated at the target rotational speed ω ^* given from the outside.

  In addition, as a sequence pattern of the rotation speed of the inverter motor 70 in the mill process in the present embodiment, “3000 rpm for 2 minutes and 0 rpm for 10 seconds” may be set as one set, and a total of three sets may be performed.

(Control calculation in the kneading process)
Next, a control method in the kneading process will be described. In the kneading step, the rotation speed control means 803 of the control means 108 performs a control calculation by a PID control method shown in the following expression 3 in which differential control is added to proportional control and integral control.

I ^* = Gpω × (ω ^* −ω) + Giω × Σ (ω ^* −ω) + Gdω × Δ (ω ^* −ω)
... (Formula 3)
Where, Gpω: rotational speed control proportional gain, Giω: integral gain
Gdω: Differential speed control differential gain
ω: actual rotational speed, ω ^* : target rotational speed
I ^* : Current command value (Σ represents time integration, Δ represents time differentiation)

The current command value I ^* for realizing the target rotational speed ω ^* in the kneading process is calculated by the control calculation by this PID control method. The control calculation after calculating the current command value I ^* is the same as that in the milling process described above. That is, the output voltage V is calculated by applying I ^* calculated in Expression 3 to Expression 2, and then the pulse pattern signal, the signal for driving the switching elements 400-405, and the like are sequentially calculated and output, and the inverter unit 104 To control. In this way, in the kneading step, the inverter motor 70 and the blade unit 80 connected to the inverter motor 70 can be rotated at the target rotational speed ω ^* given from the outside.

  As a sequence pattern of the rotation speed of the inverter motor 70 in the kneading process in this embodiment, “100 rpm for 1 minute, 200 rpm for 3 minutes and 250 rpm for 5 minutes” is set as one set, and two sets are performed in total. May be.

  FIGS. 9 and 10 are transition diagrams showing an example of the operation result in the kneading step according to the control method of the rotation speed control means 803 in the control means 108. 9 and 10, when PID control including differential control is performed as the rotational speed control of the inverter motor 70 in the kneading process (FIG. 9) and when PI control not including differential control is performed (FIG. 10). ).

FIG. 9 shows changes in the rotational speed and current of the inverter motor 70 in the kneading process of the automatic bread maker in the present embodiment. FIG. 9 shows the actual rotation speed, actual current value I, and current command value I of the inverter motor 70 (kneading blade 84) when the PID control based on Expression 3 is performed by the rotation speed control means 803 in the kneading step. It is a transition diagram showing an example of transition of ^* . As shown in FIG. 9, when PID control is used, the rotation speed of the inverter motor 70 is maintained to be substantially constant. That is, by operating the current command value ^* and the current using the rotation speed error, the time integral value of the error, and the time differential value of the error by PID control, the rotation speed of the inverter motor 70 becomes the target rotation speed ω ^*. Is controlled to be substantially constant.

On the other hand, FIG. 10 shows changes in the rotational speed and current of the inverter motor 70 when the kneading process is controlled by PI control not including differential control in the drive circuit of the automatic bread maker shown in FIG. In FIG. 10, in the kneading step, the actual rotation of the inverter motor 70 (kneading blade 84) in the case where PI control (control similar to Expression 1) in which differential control is omitted from Expression 3 by the rotation speed control means 803 is performed. Number, actual current value I, and current command value I ^* are shown as an example. As shown in FIG. 10, when PI control is used, it turns out that the rotation speed of the inverter motor 70 is changing greatly. This principle is as follows. That is, since the dough is clay-like in the kneading process, the load (torque) that the kneading blade 84 receives from the dough varies greatly in time than the load that the mill blade 82 receives from the dough in the milling process. When the load received by the kneading blade 84 varies greatly, the number of revolutions of the inverter motor 70 connected to the kneading blade 84 and the kneading blade 84 also varies greatly. If the PI control by proportional control and integral control not including differential control is performed as the rotation speed control of the inverter motor 70 in this case, it is not possible to cope with a large rotation speed fluctuation of the inverter motor 70 in the kneading operation. As a result, the fluctuation of the rotational speed of the inverter motor 70 becomes larger than when the PID control as shown in FIG. 9 is performed. On the other hand, according to PID control, since differential control is included, it is possible to cope with a large rotational speed fluctuation of the inverter motor 70 in the kneading operation, and the rotational speed can be maintained substantially constant.

  As an example of the rotational speed fluctuation of the inverter motor 70, 250-350 rpm in the case of PID control including differential control as shown in FIG. 9, PI control not including differential control as shown in FIG. In the case of 150-450 rpm.

  FIG. 11 is a transition diagram illustrating an example of changes in the rotation speed and current of the inverter motor 70 (mill blade 82) in the milling process of the automatic bread maker according to the present embodiment. FIG. 11 shows an example of transition of the rotational speed and current of the inverter motor 70 when the PI control based on Expression 1 is performed by the rotational speed control means 803 in the mill process. As shown in FIG. 11, even when PI control is used instead of PID control, the rotation speed of the inverter motor 70 in the milling process is maintained substantially constant. Since the dough is not clay-like in the milling process, fluctuations in the load received by the mill blade 82 and the inverter motor 70 are small, and a stable rotational speed of the inverter motor 70 is realized even with PI control that does not include differential control. ing. On the contrary, when differential control is introduced in the milling process, the rotational speed of the inverter motor 70 tends to become unstable because it reacts too sensitively to fluctuations in the rotational speed of the inverter motor 70. Therefore, in the mill process, the rotational speed of the inverter motor 70 is controlled by PI control that does not include differential control.

  FIG. 12 is a transition diagram showing an example of the transition of the output voltage of the inverter unit 104 in the milling process and the kneading process in the automatic bread maker of the present embodiment. As described above, when the output shaft 71 of the inverter motor 70 is rotated in the forward direction, the kneading operation is performed by rotating the kneading blade 84 in the forward direction. On the other hand, when the output shaft 71 of the inverter motor 70 is rotated in the reverse direction, the mill operation is performed by rotating the mill blade 82 in the reverse direction. In order to realize the forward and reverse rotations of the inverter motor 70, the inverter unit 104 outputs a voltage as shown in FIG. 12 to the inverter motor 70.

  That is, at the time of the kneading step, a sinusoidal AC voltage is output in the order of U phase, V phase, W phase to the three-phase windings (U phase, V phase, W phase) of the inverter motor 70, The inverter motor 70 is rotated in the forward direction. On the other hand, during the milling process, the inverter motor 70 is rotated in the reverse direction by outputting a sinusoidal AC voltage in the order of the U phase, the W phase, and the V phase. As described above, the inverter unit 104 of the drive circuit changes the rotation direction of the inverter motor 70 in the kneading process and the milling process, thereby realizing a kneading function and a milling function by one inverter motor 70.

  As described above, the automatic bread maker in the present embodiment includes the cooking container 40 into which the bread ingredients are charged, the kneading blade 84 and the mill blade 82 that are rotatably provided in the cooking container 40, the kneading blade 84 and the mill. A single motor 70 that transmits rotational driving force to the blades 82 and an inverter device 200 that controls rotation by the motor 70 are provided. The inverter device 200 transmits the rotational driving force of the motor 70 to the mill blade 82 and mills the bread ingredients by the rotation of the mill blade 82, and transmits the rotational driving force of the motor 70 to the kneading blade 84 and kneads. The rotation of the motor 70 is controlled so as to carry out the kneading process of kneading bread ingredients by the rotation of the blades 84. Further, different rotation control is performed in the kneading process and the milling process.

  As described above, since the single motor 70 is used, the automatic bread maker can be downsized. Further, since the rotation control of the motor 70 in the kneading process and the mill process is performed by the inverter device 200, the rotation speed of the motor 70 and the blades can be variably controlled, and the bread generation process, particularly the kneading process and the mill In the process, a more appropriate operation of the motor 70 can be performed. Moreover, since different rotation control (the number of rotations, a rotation direction, a control method, etc. differ) is performed by the kneading | mixing process and a mill process, the more suitable operation of the motor 70 can be performed. In this way, a highly reliable automatic bread maker can be realized.

The automatic bread maker in the present embodiment includes a cooking container 40 into which bread ingredients are charged, a kneading blade 84 that is rotatably provided in the cooking container 40, and a motor that transmits rotational driving force to the kneading blade 84. 70 and an inverter device 200 that controls the rotation of the motor 70. The inverter device 200 transmits the rotational driving force of the motor 70 to the kneading blades 84 and kneads the bread ingredients by the rotation of the kneading blades 84. Rotation speed control means 803 for controlling the rotation speed of the motor 70 and controlling the rotation speed of the motor 70 is provided. The rotation speed control means 803 has a function of controlling the rotation speed of the motor 70 in the kneading step so as to be a target rotation speed ω ^* calculated by a control calculation including differential control.

  Thus, the rotation control of the motor 70 in the kneading process is performed by the inverter device 200, and the rotation control of the motor 70 is performed using the control calculation including the differential control. Therefore, it is possible to variably control the rotation speed of the motor 70 and the blades, and it is possible to perform more appropriate operation of the motor 70 by performing control by differential control with respect to fluctuations in the rotation speed, particularly in the kneading process. . In this way, a highly reliable automatic bread maker can be realized.

  Although this embodiment demonstrated what implement | achieved switching of the control of the rotation speed in the automatic bread machine which has both a kneading process and a mill process, it is not restricted to such a case. For example, even in an automatic bread maker having only a kneading process that does not have a milling process, the same effect can be obtained by controlling the kneading process by a similar method using differential control. Further, even when the kneading blade motor and the mill blade motor are provided separately (for example, two motors are provided), the same effect can be obtained.

In the present embodiment, the current command value I ^* is calculated based on the target rotational speed ω ^* , and the output voltage V ^* is calculated based on the current command value I ^* and the actual current value I. It is not limited to such a case. For example, the output voltage V may be calculated directly from the target rotational speed ω ^* without calculating the current command value I ^* . In this case, the rotation speed control means 803 may be directly connected to the voltage output means 805 without providing the current detection means 801 and the current control means 804.

  As described above, the automatic bread maker in the present embodiment can operate a more appropriate motor in the bread generation process, and has high reliability, so that the automatic bread maker particularly used in general homes Useful.

Claims (10)

An automatic bread maker that processes bread ingredients to produce bread,
A cooking container into which bread ingredients are charged;
A kneading blade and a mill blade which are rotatably provided in the cooking container;
A single motor that transmits rotational driving force to the kneading blade and the mill blade;
A kneading shaft for transmitting the rotational driving force from the motor to the kneading blades;
The rotational driving force from the motor is transmitted to the mill blade, the mill shaft provided inside the kneading shaft,
An inverter device for controlling rotation by a motor,
The inverter device transmits the rotational driving force of the motor to the mill blade and mills the bread ingredients by rotating the mill blade, and transmits the rotational driving force of the motor to the kneading blades and rotates the kneading blade to produce the bread ingredients. Neri controls the rotation of the motor so as to perform a kneading step for the, have rows of different rotational control during compounding and milling step,
The inverter device is an automatic bread maker having a function of setting the rotation speed of the motor in the milling process to be higher than the rotation speed of the motor in the kneading process . A first pulley that transmits the rotational driving force from the motor to the kneading shaft; and a second pulley that transmits the rotational driving force from the motor to the mill shaft;
The automatic bread maker according to claim 1, wherein the first pulley has a larger diameter than the second pulley. An automatic bread maker that processes bread ingredients to produce bread,
A cooking container into which bread ingredients are charged;
A kneading blade and a mill blade which are rotatably provided in the cooking container;
A single motor that transmits rotational driving force to the kneading blade and the mill blade;
An inverter device for controlling rotation by a motor,
The inverter device transmits the rotational driving force of the motor to the mill blade and mills the bread ingredients by rotating the mill blade, and transmits the rotational driving force of the motor to the kneading blades and rotates the kneading blade to produce the bread ingredients. In addition to controlling the rotation of the motor to carry out the kneading process of performing kneading, different rotation control is performed in the kneading process and the milling process,
The inverter device includes a rotation speed control means for controlling the rotation speed of the motor,
The rotational speed control means is an automatic bread maker having a function of controlling the rotational speed of the motor in the kneading process so as to be a target rotational speed calculated by a control calculation including differential control. The automatic bread maker according to claim 3 , wherein the inverter device has a function of changing a rotation direction of the motor in the kneading step and the milling step. The automatic bread maker according to claim 3 or 4 , wherein the inverter device has a function of changing a rotation speed of the motor in the kneading step and the milling step. The automatic bread maker according to claim 5 , wherein the inverter device sets the rotation speed of the motor in the mill process to be higher than the rotation speed of the motor in the kneading process. The inverter device includes current control means for controlling the current supplied to the motor,
Speed control means, by outputting a target current value calculated by the current control means, for controlling the rotation speed of the motor in the kneading step so as to target rotational speed, any one of claims 3 6 Automatic bread machine as described in. The inverter device includes current detection means for detecting the current value supplied to the motor using the voltage across the protective resistor provided in the inverter device, and the current value detected by the current detection means is used as the current control means. The automatic bread maker according to claim 7 which outputs. Speed control means, the rotational speed of the motor in the mill process, having the function of controlling so that the target rotational speed Ne that is calculated by including the proportional control and integral control control operation, one of claims 3 8 2. An automatic bread maker according to item 1. An automatic bread maker that processes bread ingredients to produce bread,
A cooking container into which bread ingredients are charged;
A kneading blade provided rotatably in the cooking container;
A motor that transmits rotational driving force to the kneading blades;
An inverter device for controlling rotation by a motor,
The inverter device controls the rotation of the motor so as to carry out a kneading process in which the rotation driving force of the motor is transmitted to the kneading blade and the kneading blade is kneaded by the rotation of the kneading blade, and the rotation speed for controlling the rotation speed of the motor With control means,
The rotational speed control means is an automatic bread maker having a function of controlling the rotational speed of the motor in the kneading process so as to be a target rotational speed calculated by a control calculation including differential control.

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