WO2012063518A1

WO2012063518A1 - Automatic breadmaker

Info

Publication number: WO2012063518A1
Application number: PCT/JP2011/064739
Authority: WO
Inventors: あつみ高濱; 小倉　久幸; 井尻　準之介; 久美子岡本
Original assignee: 三洋電機株式会社; 三洋電機コンシューマエレクトロニクス株式会社
Priority date: 2010-11-09
Filing date: 2011-06-28
Publication date: 2012-05-18

Abstract

This automatic breadmaker is provided with: a kneading/mixing motor (50) that can apply rotary power that causes low-speed rotation to a driving shaft; a pulverizing motor (60) that can apply rotary power that causes high-speed rotation to the driving shaft; an AC power source (P) and TRIAC (TRI) that can supply AC power to the kneading/mixing motor (50) and the pulverizing motor (60); and a relay (RY) that can electrically and mechanically connect the AC power source (P) and TRIAC (TRI) to either the kneading/mixing motor (50) or the pulverizing motor (60), and that can switch the connection. As a result, the AC power source (P) and TRIAC (TRI) are prevented from connecting to both the kneading/mixing motor (50) and the pulverizing motor (60) and supplying AC power to both.

Description

Automatic bread machine

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

Commercially available automatic bread maker for home use generally has a mechanism for producing bread by directly using a bread container into which bread ingredients are placed (see, for example, Patent Document 1). In such an automatic bread maker, first, a bread container in which bread ingredients are placed is placed in a baking chamber in the main body. And the bread raw material in a bread container is kneaded into bread dough with the kneading blade provided in a bread container (kneading process). Thereafter, a fermentation process for fermenting the kneaded bread dough is performed, and the bread container is used as a baking mold to bake the bread (baking process).

When bread is manufactured using such an automatic bread maker, so far, flour (wheat flour, rice flour, etc.) or flour such as wheat or rice is used as the raw material for bread. It was necessary to have a mixed powder in which various auxiliary materials were mixed. However, in general households, as represented by rice grains, grains are sometimes held in the form of grains instead of in the form of flour. For this reason, it would be very convenient if the automatic bread maker had a mechanism for producing bread directly from grains. With this in mind, the present applicants have developed a bread production method for producing bread using cereal grains as a starting material (see Patent Document 2).

In this bread manufacturing method, first, cereal grains and liquid are mixed, and the crushed blade is rotated in this mixture to pulverize the cereal grains (grinding step). And the bread raw material containing the paste-form ground powder obtained through the grinding process is kneaded into bread dough using a kneading blade (kneading process). Thereafter, a fermentation process for fermenting the kneaded bread dough is performed, followed by a baking process for baking the bread.

JP 2000-116526 A JP 2010-35476 A

In the bread manufacturing method of Patent Document 2, when cereal grains are crushed by a pulverizing blade, it is preferable that the pulverizing blade is rotated at a high speed (eg, 7000 to 8000 rpm). On the other hand, when the dough is kneaded with the kneading blade, it is preferable that the kneading blade is rotated at a low speed (for example, 180 rpm).

For this reason, the structure of an automatic bread maker that can produce bread using cereal grains as a starting material includes a motor for crushing used in the crushing process and a kneading machine used in the kneading process. It is considered preferable to employ a configuration in which the motor is separately provided. Such an automatic bread maker having two motors is unprecedented, and a new mechanism for manufacturing bread by accurately driving each of these two motors is required.

Therefore, an object of the present invention is to provide an automatic bread maker that can accurately drive each of a plurality of motors.

In order to achieve the above object, the automatic bread maker of the present invention provides a driving shaft that can be connected to a bread container into which bread ingredients are charged so that the rotating power can be transmitted, and a rotating power that rotates at a low speed to the driving shaft. A possible first motor, a second motor capable of imparting rotational power for high-speed rotation to the driving shaft, a power supply unit capable of supplying power to the first motor and the second motor, The power supply unit and any one of the first motor and the second motor can be electrically and mechanically connected, and includes a switching unit capable of switching connection.

According to this configuration, the switching unit electrically and mechanically connects the power supply unit and one of the first motor and the second motor. That is, it is possible to prevent the power supply unit from being connected to both the first motor and the second motor and supplying power thereto.

In the automatic bread maker configured as described above, the direction in which the first motor rotates the driving shaft and the direction in which the second motor rotates the driving shaft may be reversed. According to this configuration, the switching unit prevents the first motor and the second motor from being driven simultaneously. Therefore, it is possible to prevent the automatic bread maker from being damaged by the simultaneous driving of the first motor and the second motor.

In the automatic bread maker configured as described above, the detection unit that detects the magnitude of the current supplied from the power supply unit to the first motor or the second motor, and the switching of the switching unit are controlled. A control unit that acquires a detection result of the detection unit, and the control unit acquires the control unit so that the power supply unit and the first motor are connected to each other. If it is confirmed that the power supply unit supplies a current having a magnitude equal to or larger than the first threshold based on the detection result of the detection unit, the bread making operation may be stopped. According to this configuration, when the control unit performs control to drive the first motor, the connection state of the switching unit is abnormal based on the detection result (for example, the power supply unit and the second motor are If it is determined that it is connected by mistake, the bread making operation is stopped. Therefore, for example, it is possible to prevent the control unit from driving the second motor by mistake.

In the automatic bread maker configured as described above, the control unit checks a detection result of the detection unit at predetermined timings, and the control unit connects the power supply unit and the first motor. When the switching unit is controlled as described above, when it is confirmed that the power supply unit supplies a current having a magnitude equal to or larger than the first threshold continuously for the first number of times or more, You may control to stop operation | movement. According to this configuration, even if the control unit confirms the detection result indicating that the connection state of the switching unit is abnormal, if it does not confirm the first number of times or more, it is not determined to be abnormal, and the bread making operation is stopped. do not do. Therefore, when the detection state indicating that the connection state is abnormal occurs suddenly even though the connection state of the switching unit is correct (the power supply unit and the first motor are connected), It is possible to suppress the control unit from stopping the bread making operation.

In the automatic bread maker configured as described above, the detection unit that detects the magnitude of the current supplied from the power supply unit to the first motor or the second motor, and the switching of the switching unit are controlled. A control unit that acquires a detection result of the detection unit, and the control unit acquires the control unit so that the power supply unit and the second motor are connected to each other. If it is confirmed that the power supply unit supplies a current having a magnitude equal to or smaller than the second threshold based on the detection result of the detection unit, the bread making operation may be stopped. According to this configuration, when the control unit performs control to drive the second motor, the connection state of the switching unit is abnormal based on the detection result (for example, the power supply unit and the first motor are If it is determined that it is connected by mistake, the bread making operation is stopped. Therefore, for example, it is possible to prevent the control unit from driving the first motor by mistake.

In the automatic bread maker configured as described above, the control unit checks a detection result of the detection unit at predetermined timings, and the control unit connects the power supply unit and the second motor. When the switching unit is controlled as described above, when it is confirmed that the power supply unit supplies a current having a magnitude equal to or smaller than the second threshold continuously for a second number of times or more, You may control to stop operation | movement. According to this configuration, even if the control unit confirms the detection result indicating that the connection state of the switching unit is abnormal, it does not determine that there is an abnormality unless it is confirmed more than the second number of times, and stops the bread making operation. do not do. Therefore, a detection result indicating that the connection state is abnormal occurs suddenly or transiently even though the connection state of the switching unit is correct (the power supply unit and the second motor are connected). In this case, it is possible to suppress the control unit from stopping the bread making operation.

In the automatic bread maker configured as described above, the detection unit that detects the magnitude of the current supplied from the power supply unit to the first motor or the second motor, and the switching of the switching unit are controlled. And a control unit that acquires a detection result of the detection unit, wherein the control unit checks a detection result of the detection unit at every predetermined timing, and the control unit includes the power supply unit. When the switching unit is controlled so that the first motor is connected to the first motor, the power supply unit supplies a current having a magnitude greater than or equal to the first threshold continuously for the first number of times or more. When confirming that the bread making operation is stopped, the control unit controls the switching unit so that the power supply unit and the second motor are connected. , Continuously for the second or more times. When it is confirmed that the supply unit supplies a current having a magnitude equal to or smaller than the second threshold value, the bread making operation is controlled to stop, and the second number is more than the first number. May be large. According to this configuration, when the detection result indicating that the connection state of the switching unit is abnormal is likely to occur transiently, the second number of times for the control unit to determine that the connection state of the switching unit is abnormal is determined. When the detection result indicating that the connection state of the switching unit is abnormal is unlikely to occur transiently, the control unit is larger than the first number of times for determining that the connection state of the switching unit is abnormal. Therefore, the control unit can more accurately determine that the connection state of the switching unit is abnormal.

In the automatic bread maker configured as described above, the detection unit includes a first coil connected in series to the power supply unit, the first motor, and the second motor, and the first coil. A detection result generation circuit for generating a detection result based on a current generated in the second coil and inputting the detection result to the control unit; May be provided. According to this configuration, it is possible to detect the magnitude of the current supplied by the power supply unit and input it to the control unit with a simple configuration.

In the automatic bread maker configured as described above, the switching unit switches a connection between the power supply unit and the first motor and the second motor, and switches the connection of the switch depending on whether power is supplied or not. It is good also as a structure which is a relay provided with 3 coils. According to this configuration, the power supply unit and any of the first motor and the second motor can be electrically and mechanically connected with a simple configuration, and the connection can be switched.

In the automatic bread maker configured as described above, an abnormality in at least one of the power supply state detection unit that detects the state of the power supply unit included in the power supply unit, and the first motor and the second motor An abnormality detection unit that detects the abnormality of the motor, and the abnormality detection unit may set a reference for detecting an abnormality of the motor as being different depending on a detection result of the power supply state detection unit. . According to this configuration, the abnormality detection unit sets a reference according to the state of the power supply unit, and detects a motor abnormality based on the reference. Therefore, it is possible to detect an abnormality of the motor with high accuracy according to the state fluctuation of the power supply unit.

In the automatic bread maker configured as described above, the automatic bread maker further includes a supply current detection unit that detects the magnitude of the current supplied to the motor, and the abnormality detection unit has a threshold value according to the detection result of the power supply state detection unit, When the abnormality detection unit confirms that the magnitude of the current supplied to the motor is greater than or equal to the threshold based on the detection result of the supply current detection unit, the motor is set as the reference. It is good also as detecting abnormality of. According to this configuration, even if an excessive current is generated in the circuit due to the motor being locked or the like, the situation can be detected as abnormal.

In the automatic bread maker configured as described above, the abnormality detection unit confirms the detection result of the supply current detection unit at a predetermined timing, and the abnormality detection unit is continuously performed a predetermined number of times or more. If it is confirmed that the magnitude of the current supplied to the motor is equal to or greater than the threshold value, an abnormality of the motor may be detected. According to this configuration, the abnormality detection unit does not determine that there is an abnormality unless a detection result indicating that a current equal to or greater than the threshold is supplied to the motor is continuously obtained from the supply current detection unit. Therefore, it is possible to suppress the abnormality detection unit from detecting an abnormality and inhibiting the operation of the automatic bread maker until the current supplied to the motor suddenly exceeds the threshold value.

In the automatic bread maker configured as described above, when the voltage supplied by the power supply unit is within a predetermined range, the abnormality detection unit sets the larger threshold as the voltage supplied by the power supply unit increases. Also good. According to this configuration, a threshold suitable for the power supplied by the power supply unit can be set. Therefore, the abnormality detection unit can detect the abnormality of the motor with high accuracy.

Specifically, for example, the abnormality detection unit is not confused with the case where the power supply unit supplies normal power and the motor does not have an abnormality when the motor has an abnormality and the motor has an abnormality. It becomes possible to detect abnormality of the motor. Similarly, the abnormality detection unit is not confused when the power supply unit supplies normal power and the motor is normal, and the power supply unit supplies normal power and the motor is abnormal. It becomes possible not to detect.

In the automatic bread maker configured as described above, the power supply unit supplies AC power, and the abnormality detection unit sets the threshold value that can vary depending on the frequency of AC power supplied by the power supply unit. It is good. According to this configuration, a threshold suitable for the frequency of the AC power supplied by the power supply unit can be set. Therefore, the abnormality detection unit can detect the abnormality of the motor with high accuracy.

In the automatic bread maker configured as described above, the abnormality detection unit detects at least an abnormality of the second motor, and the second motor is put into the bread container by a pulverization blade interlocked with the driving shaft. When pulverizing cereal grains, the driving shaft may be given rotational power. According to this configuration, the abnormality detection unit detects an abnormality of the motor that requires high-speed rotation of the driving shaft and that is likely to be locked due to pulverization of the grain. Therefore, it is possible to effectively increase the safety of the automatic bread maker and effectively suppress the occurrence of failure.

According to the present invention, the switching unit electrically and mechanically connects the power supply unit and one of the first motor and the second motor. Therefore, each of the first motor and the second motor can be accurately driven. In addition, according to the present invention, it is possible to detect a motor abnormality with high accuracy according to the state of the power supply unit. Therefore, the safety of the automatic bread maker can be improved and the occurrence of failure can be suppressed.

The schematic perspective view which shows the external appearance structure of the automatic bread maker of 1st Embodiment. The schematic diagram for demonstrating the structure inside the main body of the automatic bread maker of 1st Embodiment. The figure for demonstrating the clutch contained in the 1st power transmission part with which the automatic bread maker of 1st Embodiment is provided, The figure which shows the state which a clutch cuts off power The figure for demonstrating the clutch contained in the 1st power transmission part with which the automatic bread maker of 1st Embodiment is equipped, The figure which shows the state in which a clutch transmits power The figure which shows typically the structure of the baking chamber in which the bread container was accommodated, and its periphery in the automatic bread maker of 1st Embodiment. The schematic perspective view which shows the structure of the blade unit with which the automatic bread maker of 1st Embodiment is provided. Schematic exploded perspective view showing a configuration of a blade unit provided in the automatic bread maker of the first embodiment The schematic side view which shows the structure of the blade unit with which the automatic bread maker of 1st Embodiment is provided. Sectional view at the position AA in FIG. 7A FIG. 3 is a schematic plan view of the blade unit included in the automatic bread maker according to the first embodiment when viewed from below, and a view when the kneading blade is in a folded posture. FIG. 3 is a schematic plan view of the blade unit included in the automatic bread maker according to the first embodiment when viewed from below, and a view when the kneading blade is in an open posture. The figure when the bread container with which the automatic bread maker of 1st Embodiment is provided is seen from the top, and the figure when a kneading blade is in a folding posture The figure when the bread container provided in the automatic bread maker of the first embodiment is viewed from above, and the figure when the kneading blade is in the open posture The block diagram which shows the structure of the automatic bread maker of 1st Embodiment. The schematic diagram which shows the flow of the bread-making course for rice grains performed with the automatic bread maker of 1st Embodiment. The circuit diagram which shows the drive circuit of the motor with which the automatic bread maker of 1st Embodiment is provided. The flowchart which shows the confirmation operation of the abnormality of the relay by the control apparatus with which the automatic bread maker of 1st Embodiment is provided. The block diagram which shows the structure of the automatic bread maker of 2nd Embodiment. The circuit diagram which shows the motor drive circuit with which the automatic bread maker of 2nd Embodiment is provided. The flowchart which shows the abnormality detection operation | movement of the grinding | pulverization motor by the control apparatus with which the automatic bread maker of 2nd Embodiment is provided. The block diagram which shows the structure of the automatic bread maker of 3rd Embodiment. The circuit diagram which shows the motor drive circuit with which the automatic bread maker of 3rd Embodiment is provided.

Hereinafter, embodiments of the automatic bread maker of the present invention will be described in detail with reference to the drawings. In addition, the specific time, temperature, etc. which appear in this specification are illustrations to the last, and they do not limit the content of this invention.

1. First embodiment (configuration of automatic bread maker)
FIG. 1 is a schematic perspective view showing an external configuration of the automatic bread maker according to the first embodiment. As shown in FIG. 1, an operation unit 20 is provided on a part of the upper surface of a main body 10 (the outer shell of which is formed of, for example, metal or synthetic resin) of an automatic bread maker 1 provided in a substantially rectangular parallelepiped shape. It has been. The operation unit 20 includes an operation key group and a display unit that displays time, contents set by the operation key group, errors, and the like. The operation key group includes, for example, a start key, a cancel key, a timer key, a reservation key, a bread manufacturing course (a course for manufacturing bread using rice grains as a starting material, a course for manufacturing bread using rice flour as a starting material) And a selection key for selecting a course for producing bread using flour as a starting material. The display unit is configured by, for example, a liquid crystal display panel.

Inside the main body 10 is provided a baking chamber 30 in which a bread container 80, which will be described later in detail, is accommodated. The firing chamber 30 is composed of, for example, a bottom wall 30a made of sheet metal and four side walls 30b (see also FIG. 4 described later). The baking chamber 30 has a substantially rectangular box shape in plan view, and its upper surface is open. The firing chamber 30 can be opened and closed by a lid 40 provided on the upper part of the main body 10. The lid 40 is attached to the back side of the main body 10 with a hinge shaft (not shown), and the firing chamber 30 can be opened and closed by rotating about the hinge shaft as a fulcrum. FIG. 1 shows a state where the lid 40 is opened.

The lid 40 is provided with a viewing window 41 made of heat-resistant glass, for example, so that the inside of the baking chamber 30 can be seen. A bread ingredient storage container 42 is attached to the lid 40. This bread ingredient storage container 42 makes it possible to automatically feed some bread ingredients during the bread production process. The bread raw material storage container 42 includes a box-shaped container body 42a having a substantially rectangular plane shape, and a container lid 42b that is provided so as to be rotatable with respect to the container body 42a and opens and closes the opening of the container body 42a. . Further, the bread ingredient storage container 42 can support the container lid 42b from the outer surface (lower surface) side and maintain the closed state of the opening of the container body 42a, and is moved by an external force to move the container lid 42b to the container lid 42b. There is also provided a movable hook 42c for releasing the engagement.

An automatic closing solenoid 16 (see FIG. 10 to be described later) is provided in the main body 10 on the lower side of the operation unit 20, and when the automatic closing solenoid is driven, the plunger wall surface of the main body adjacent to the lid 40. It protrudes from an opening 10b provided in 10a. Then, the movable hook 42c is moved by a movable member (not shown) movable by the protruding plunger, the engagement between the container lid 42b and the movable hook 42c is released, the container lid 42b is rotated, and the container main body 42a. The opening of is opened. Note that FIG. 1 shows a state where the opening of the container main body 42a is opened.

The container main body 42a and the container lid 42b are preferably provided with a metal such as aluminum so that powder bread materials (for example, gluten, dry yeast, etc.) stored in the container do not remain in the container. These surfaces are preferably covered with a silicon-based or fluorine-based coating layer, and more preferably configured to be covered with an alumite layer. Moreover, it is preferable that the container main body 42a and the container lid 42b are formed as smoothly as possible without being uneven. The same applies to the members on the inner side of the lid 40 (the side on which the bread ingredient storage container 42 is attached), and it is preferable that the base is made of aluminum and the surface is covered with a coating layer such as silicon or fluorine or an alumite layer. .

In addition, if steam or the like generated when pulverizing grains such as rice grains enters the container body 42a, it is not preferable because the bread material easily adheres to the inner surface of the container. For this purpose, a flange (flange) is provided at the opening side edge of the container main body 42a so that the aforementioned steam or the like does not enter the container, and a packing is provided between the flange and the container lid 42b. (Seal member) 42d is interposed.

FIG. 2 is a schematic diagram for explaining the internal configuration of the main body of the automatic bread maker according to the first embodiment. FIG. 2 assumes a case where the automatic bread maker 1 is viewed from above, and the lower side of the figure is the front side of the automatic bread maker 1 and the upper side of the figure is the back side. As shown in FIG. 2, in the automatic bread maker 1, a low-speed / high-torque type kneading motor 50 used in the kneading process is fixedly disposed on the right side of the baking chamber 30, and the grinding process is performed behind the baking chamber 30. The high-speed rotation type crushing motor 60 used in the above is fixedly arranged. The kneading motor 50 and the crushing motor 60 are both shafts. The kneading motor 50 is an example of the first motor of the present invention, and the crushing motor 60 is an example of the second motor of the present invention.

The first pulley 52 is fixed to the output shaft 51 protruding from the upper surface of the kneading motor 50. The first pulley 52 is connected by a first belt 53 to a second pulley 55 having a diameter larger than that of the first pulley 52 and fixed to the upper side of the first rotating shaft 54. Has been. A second rotating shaft 57 is provided on the lower side of the first rotating shaft 54 so that the center of rotation is substantially the same as the first rotating shaft 54 (see FIGS. 3A and 3B described later). . The first rotating shaft 54 and the second rotating shaft 57 are rotatably supported inside the main body 10. Further, a clutch 56 that performs power transmission and power interruption is provided between the first rotating shaft 54 and the second rotating shaft 57 (see FIGS. 3A and 3B described later). The configuration of the clutch 56 will be described later.

A third pulley 58 is fixed to the lower side of the second rotating shaft 57 (see FIGS. 3A and 3B described later). The third pulley 58 is provided on the lower side of the firing chamber 30 by the second belt 59 and is fixed to the driving shaft 11 and has a first driving shaft pulley 12 (having substantially the same diameter as the third pulley 58). (See FIGS. 3A and 3B described later). The kneading motor 50 itself is a low speed / high torque type, and the rotation of the first pulley 52 is decelerated and rotated by the second pulley 55 (for example, decelerated to 1/5 speed). For this reason, when the kneading motor 50 is driven in a state where the clutch 56 transmits power, the driving shaft 11 rotates at a low speed.

In the following, the first pulley 52, the first belt 53, the first rotating shaft 54, the second pulley 55, the clutch 56, the second rotating shaft 57, the third pulley 58, and the second belt 59 are used. , And the first driving shaft pulley 12 may be expressed as a first power transmission unit PT1.

A fourth pulley 62 is fixed to the output shaft 61 protruding from the lower surface of the grinding motor 60. The fourth pulley 62 is fixed by a third belt 63 below the second driving shaft pulley 13 (below the first driving shaft pulley 12) fixed to the driving shaft 11; 3A and FIG. 3B). The second driving shaft pulley 13 has substantially the same diameter as the fourth pulley 62. As the crushing motor 60, a high-speed rotating one is selected, and the rotation of the fourth pulley 62 is maintained at substantially the same speed in the second driving shaft pulley 13. Therefore, when the crushing motor 60 is driven, the driving shaft 11 is driven. Performs high-speed rotation (for example, 7000 to 8000 rpm).

Hereinafter, the power transmission unit including the fourth pulley 62, the third belt 63, and the second driving shaft pulley 13 may be expressed as a second power transmission unit PT2. The second power transmission unit PT2 has a configuration that does not have a clutch, and connects the output shaft 61 of the crushing motor 60 and the driving shaft 11 so that power can be transmitted constantly.

3A and 3B are views for explaining a clutch included in the first power transmission unit included in the automatic bread maker of the first embodiment. 3A and 3B are diagrams assuming a case of viewing along the direction of the arrow X in FIG. 3A shows a state in which the clutch 56 performs power interruption, and FIG. 3B shows a state in which the clutch 56 transmits power.

3A and 3B, the clutch 56 includes a first clutch member 561 and a second clutch member 562. Then, when the claw 561a provided on the first clutch member 561 and the claw 562a provided on the second clutch member 562 are engaged with each other (the state shown in FIG. 3B), the clutch 56 transmits power. Further, when the two

claws

561a and 562a are not engaged with each other (the state shown in FIG. 3A), the clutch 56 cuts off the power. That is, the clutch 56 is a meshing clutch.

In the present embodiment, each of the two

clutch members

561 and 562 has a circumferential direction (when the first clutch member 561 is seen in plan view from below, or the second clutch member 562 is seen in plan view from above. Assuming the case), six

claws

561a and 562a arranged at almost equal intervals are provided, but the number of the claws may be appropriately changed. Moreover, what is necessary is just to select a preferable shape suitably for the shape of nail | claw 561a and 562a.

The first clutch member 561 is slidable in the axial direction (vertical direction in FIGS. 3A and 3B) with respect to the first rotating shaft 54 and is not relatively rotatable. It is attached. A spring 71 is loosely fitted on the upper side of the first clutch member 561 of the first rotating shaft 54. The spring 71 is disposed so as to be sandwiched between a stopper portion 54a provided on the first rotating shaft 54 and the first clutch member 561, and biases the first clutch member 561 downward. ing. On the other hand, the second clutch member 562 is fixed to the upper end of the second rotating shaft 57.

Switching between the power transmission state and the power cut-off state in the clutch 56 is performed using the arm portion 72 that can be selectively arranged at the lower position and the upper position. A part of the arm portion 72 is disposed below the first clutch member 561 and can contact the outer peripheral portion of the first clutch member 561.

When the arm portion 72 moves from the lower position (state shown in FIG. 3B) to the upper position (state shown in FIG. 3A), the first clutch member 561 moves upward against the urging force of the spring 71. When the arm portion 72 is in the upper position, the first clutch member 561 and the second clutch member 562 do not mesh with each other. That is, when the arm portion 72 is in the upper position, the clutch 56 performs power interruption.

On the other hand, when the arm part 72 moves from the upper position to the lower position, the first clutch member 561 moves downward while being pushed by the urging force of the spring 71. When the arm portion 72 is in the lower position, the first clutch member 561 and the second clutch member 562 are engaged with each other. That is, when the arm portion 72 is in the lower position, the clutch 56 transmits power.

When the crushing motor 60 is driven, if the clutch 56 is in a state where power is transmitted (the state shown in FIG. 3B), rotational power for rotating the driving shaft 11 at high speed is transmitted to the output shaft 51 of the kneading motor 50 (FIG. 2). In this case, if the crushing motor 60 is rotated at, for example, 8000 rpm, the output shaft 51 of the kneading motor 50 is rotated at 40000 rpm depending on the radius ratio (for example, 1: 5) between the first pulley 52 and the second pulley 55. The power to make it necessary. As a result, a very large load is applied to the pulverization motor 60, and the pulverization motor 60 may be damaged. For this reason, when driving the grinding motor 60, it is necessary to prevent the rotational power for rotating the driving shaft 11 from being transmitted to the output shaft 51 of the kneading motor 50. Thus, as described above, the automatic bread maker 1 includes the clutch 56 that performs power transmission and power interruption in the first power transmission unit PT1.

Note that, as described above, in the automatic bread maker 1, the second power transmission unit PT2 is not provided with a clutch, for the following reason. That is, even if the kneading motor 50 is driven, the driving shaft 11 is only rotated at a low speed (for example, 180 rpm). For this reason, even if the rotational power for rotating the driving shaft 11 is transmitted to the output shaft of the crushing motor 60, a large load is not applied to the kneading motor 50. And the manufacturing cost of the automatic bread maker 1 is suppressed by adopting the structure in which the clutch is not provided in the second power transmission part PT2 in this way. However, it goes without saying that a configuration in which a clutch is provided in the second power transmission unit PT2 may be adopted.

FIG. 4 is a diagram schematically showing a configuration of a baking chamber in which a bread container is accommodated and its surroundings in the automatic bread maker of the first embodiment. FIG. 4 assumes a configuration when the automatic bread maker 1 is viewed from the front side, and the configurations of the baking chamber 30 and the bread container 80 are generally shown in cross-sectional views. In addition, the bread container 80 used as a baking mold while the bread raw material is input can be taken in and out of the baking chamber 30.

As shown in FIG. 4, a sheathed heater 31 is arranged inside the baking chamber 30 so as to surround a bread container 80 accommodated in the baking chamber 30. By using this sheathed heater 31, it is possible to heat the bread ingredients in the bread container 80 (this expression may include bread dough).

Further, a bread container support portion 14 (for example, made of an aluminum alloy die-cast product) that supports the bread container 80 is fixed to a location that is substantially at the center of the bottom wall 30a of the baking chamber 30. The bread container support portion 14 is formed so as to be recessed from the bottom wall 30a of the baking chamber 30, and the shape of the recess is substantially circular when viewed from above. At the center of the bread container support portion 14, the above-described driving shaft 11 is supported so as to be substantially perpendicular to the bottom wall 30a.

The bread container 80 is, for example, an aluminum alloy die-cast molded product (others may be made of sheet metal or the like), has a bucket-like shape, and is handed to the flange 80a provided on the side edge of the opening. A handle (not shown) is attached. The horizontal cross section of the bread container 80 is a rectangle with rounded corners. Further, a concave portion 81 having a substantially circular shape in a plan view is formed on the bottom of the bread container 80 so as to accommodate a part of a blade unit 90 which will be described in detail later.

At the center of the bottom of the bread container 80, a blade rotating shaft 82 extending in the vertical direction is rotatably supported in a state where a countermeasure against sealing is taken. A container side coupling member 82a is fixed to the lower end of the blade rotation shaft 82 (projecting outward from the bottom of the bread container 80). In addition, a cylindrical pedestal 83 is provided on the bottom outer surface side of the bread container 80, and the bread container 80 is accommodated in the baking chamber 30 in a state where the pedestal 83 is received by the bread container support part 14. It has become so. The pedestal 83 may be formed separately from the bread container 80 or may be formed integrally with the bread container 80.

When the pedestal 83 of the bread container 80 is received in the baking chamber 30 in a state of being received by the bread container support portion 14, the container-side coupling member 82 a provided at the lower end of the blade rotation shaft 82 and the driving shaft 11. The coupling (coupling) with the driving shaft side coupling member 11a fixed to the upper end of the shaft can be obtained. As a result, the blade rotation shaft 82 can transmit the rotational power from the driving shaft 11.

The blade unit 90 is detachably attached to a portion of the blade rotating shaft 82 protruding into the bread container 80 from above. The configuration of the blade unit 90 will be described with reference to FIGS. 5, 6, 7A, 7B, 8A, 8B, 9A, and 9B.

FIG. 5 is a schematic perspective view showing the configuration of the blade unit provided in the automatic bread maker of the first embodiment. FIG. 6 is a schematic exploded perspective view showing a configuration of a blade unit provided in the automatic bread maker of the first embodiment. 7A and 7B are views showing a configuration of a blade unit provided in the automatic bread maker of the first embodiment, FIG. 7A is a schematic side view, and FIG. 7B is a cross-sectional view at the position AA in FIG. 7A. 8A and 8B are schematic plan views of the blade unit included in the automatic bread maker according to the first embodiment when viewed from below, FIG. 8A is a view when the kneading blade is in a folded position, and FIG. 8B is a kneading position. It is a figure in case a braid | blade exists in an open attitude | position. 8A and 8B show a state in which a guard to be described later is removed. FIG. 9A and FIG. 9B are diagrams when the bread container provided in the automatic bread maker of the first embodiment is viewed from above. FIG. 9A is a view when the kneading blade is in a folded position, and FIG. 9B is a view when the kneading blade is in an open position.

The blade unit 90 is roughly divided into a unit shaft 91, a crushing blade 92 attached to the unit shaft 91 so as not to rotate relative to the unit shaft 91, and a plan view attached to the unit shaft 91 so as to be relatively rotatable and covering the crushing blade 92. A substantially circular dome-shaped cover 93 and a kneading blade 101 attached to the dome-shaped cover 93 so as to be relatively rotatable are configured (see, for example, FIGS. 5, 6, 7A and 7B). In a state where the blade unit 90 is attached to the blade rotation shaft 82, the crushing blade 92 is positioned slightly above the bottom surface of the recess 81 of the bread container 80. Further, almost the entire grinding blade 92 and the dome-shaped cover 93 are accommodated in the recess 81.

The unit shaft 91 is a substantially cylindrical member formed of a metal such as a stainless steel plate, for example, and has an opening at one end (the lower end in FIGS. 6 and 7B), and the inside is hollow. That is, the insertion shaft 91c is formed in the unit shaft 91 (see FIG. 7B). In addition, a pair of notches 91a are formed on the lower side (opening side) of the side wall of the unit shaft 91 so as to be symmetrically arranged with respect to the rotation center of the unit shaft 91 (see, for example, FIG. 6). 6 shows only one of them). When the unit shaft 91 is put on the blade rotation shaft 82, a pin 821 (see FIG. 7B) that penetrates the blade rotation shaft 82 horizontally engages with the notch 91 a, and the unit shaft 91 is attached to the blade rotation shaft 82. It is attached so that it cannot rotate relative to it.

As shown in FIG. 7B, the upper inner surface of the unit shaft 91 is engaged with the convex portion 82b provided at the center of the upper surface (substantially circular) of the blade rotation shaft 82 (shown by a broken line). A recess 91b is formed at the center. Accordingly, the blade unit 90 can be easily attached to the blade rotation shaft 82 in a state where the centers of the unit shaft 91 and the blade rotation shaft 82 are aligned. For this reason, unnecessary rattling during rotation of the blade is suppressed. In the present embodiment, the convex portion 82b is provided on the blade rotating shaft 82 side and the concave portion 91b is provided on the unit shaft 91 side, but conversely, the concave portion is provided on the blade rotating shaft 82 side and the unit shaft 91 side is provided. A configuration in which a convex portion is provided may be employed.

The pulverizing blade 92 for pulverizing grains is formed of, for example, a stainless steel plate, and the shape thereof is, for example, an airplane propeller. As shown in FIG. 6, an opening 923 a having a substantially rectangular shape in plan view is formed at the center of the crushing blade 92. The crushing blade 92 is attached from the lower side of the unit shaft 91 so that the unit shaft 91 is fitted into the opening 923a.

The lower side of the unit shaft 91 has a shape that is obtained by scraping the side surface of the cylinder, and is substantially the same shape (substantially rectangular shape) as the opening 923a of the grinding blade 92 when viewed from below. The area when the lower side of the unit shaft 91 is viewed from below is slightly smaller than the opening 923a. Since such a shape is adopted, the grinding blade 92 is attached to the unit shaft 91 so as not to be relatively rotatable. Since the stopper member 94 for preventing the retaining member 94 is fitted into the unit shaft 91 on the lower side of the pulverizing blade 92, the pulverizing blade 92 does not fall off the unit shaft 91.

The dome-shaped cover 93 disposed so as to surround and cover the crushing blade 92 is made of, for example, an aluminum alloy die-cast product, and a bearing 95 (in this embodiment, a rolling bearing is used on the inner surface side thereof. ) (See FIG. 7B) is formed. In other words, in order to form the accommodating portion 931, the dome-shaped cover 93 has a configuration in which a substantially cylindrical convex portion 93a is formed at the center when viewed from the outer surface. In addition, the opening is not formed in the convex part 93a, and the bearing 95 accommodated in the accommodating part 931 is in the state in which the side surface and the upper surface are enclosed by the wall surface of the accommodating part 931.

The inner ring 95a is attached to the unit shaft 91 so as not to rotate relative to the bearing 95 with the retaining rings 96a and 96b arranged on the upper and lower sides (the unit shaft 91 is press-fitted into a through hole inside the inner ring 95a. ing). The bearing 95 is press-fitted into the housing portion 931 so that the outer wall of the outer ring 95b is fixed to the side wall of the housing portion 931. The dome-shaped cover 93 is attached to the unit shaft 91 so as to be rotatable relative to the bearing 95 (the inner ring 95a rotates relative to the outer ring 95b).

In addition, the housing portion 931 of the dome-shaped cover 93 is made of, for example, a silicon-based material so that foreign matter (for example, liquid used when pulverizing grain grains or paste-like material obtained by pulverization) does not enter the bearing 95 from the outside. Alternatively, a seal material 97 formed of a fluorine-based material and a metal seal cover 98 that holds the seal material 97 are press-fitted from the lower side of the bearing 95. The seal cover 98 is fixed to the dome-shaped cover 93 with a rivet 99 so that the fixing to the dome-shaped cover 93 is ensured. Although fixing with the rivet 99 may not be performed, it is preferable to configure as in the present embodiment in order to obtain reliable fixing. The sealing material 97 and the sealing cover 98 function as sealing means. The seal cover 98 is preferably coated with fluorine or the like. In particular, it is preferable to use a silver paint because the coating is difficult to peel off and even if it is peeled off, it is difficult to stand out.

On the outer surface of the dome-shaped cover 93, a kneading blade 101 (for example, aluminum) in a planar shape is formed by a support shaft 100 (see FIG. 6) disposed so as to extend in a vertical direction at a location adjacent to the convex portion 93 a. (Made of die-cast alloy product) is attached. The kneading blade 101 is attached to the support shaft 100 so as not to be relatively rotatable, and moves together with the support shaft 100 attached to the dome-shaped cover 93 so as to be relatively rotatable. In other words, the kneading blade 101 is attached to the dome-shaped cover 93 so as to be relatively rotatable.

On one surface near the tip of the kneading blade 101 (assuming a portion that draws the largest circle when the kneading blade 101 is rotated about the support shaft 100), FIG. 5, FIG. 6, FIG. 7A, FIG. As shown in FIGS. 8A, 8B, 9A, and 9B, a cushioning material 107 is attached. The buffer material 107 is provided so as to slightly protrude from the tip of the kneading blade 101 (see, for example, FIG. 9B).

The buffer material 107 is fixed in a state where the buffer material 107 is sandwiched between one surface of the kneading blade 101 and the fixing plate 108 and obtained by caulking the rivet 109 inserted from the other surface side of the kneading blade 101. ing. In the present embodiment, the number of rivets 109 is two, but it goes without saying that the number is not limited.

The buffer material 107 is disposed so as not to directly contact the bread container 80 (inner wall) when the kneading blade 101 is in an open posture, which will be described in detail later. When the kneading blade 101 and the bread container 80 are in direct contact with each other, damage may occur due to interference between them, and the buffer material 107 is provided to prevent such damage.

In the automatic bread maker 1 of the present embodiment, the surface of the bread container 80 and the kneading blade 101 is coated with fluorine. For this reason, it can be said that the buffer material 107 of the present embodiment is provided so that the fluorine coating is not peeled off by contact between the kneading blade 101 and the pan container 80. From this point, the material constituting the cushioning material 107 is preferably a material softer than the coating material so as not to peel off the fluorine coating. For example, silicone rubber or TPE (Thermoplastic Elastomers) is used. . The buffer material 107 also functions as a soundproofing measure, which will be described later. In the following description, the buffer material 107 may be regarded as a part of the kneading blade 101.

Further, in this embodiment, the complementary kneading blade 102 (for example, made of an aluminum alloy die cast product) is fixedly arranged on the outer surface of the dome-shaped cover 93 so as to be aligned with the kneading blade 101. The complementary kneading blade 102 is not necessarily provided, but is preferably provided in order to increase the kneading efficiency in the kneading process of kneading the bread dough.

Here, the operation of the kneading blade 101 will be described. The kneading blade 101 rotates about the axis of the support shaft 100 together with the support shaft 100, and has two postures, a folded posture shown in FIGS. 5, 7A, 8A and 9A, and an open posture shown in FIGS. 8B and 9B. Take. In the folded position, the protrusion 101a (see FIG. 6) hanging from the lower edge of the kneading blade 101 comes into contact with the first stopper portion 93b provided on the upper surface (outer surface) of the dome-shaped cover 93. For this reason, the kneading blade 101 cannot further rotate counterclockwise (assuming the case viewed from above) with respect to the dome-shaped cover 93. In this folded position, the tip of the kneading blade 101 protrudes slightly from the dome-shaped cover 93.

When the kneading blade 101 is rotated clockwise (assumed when viewed from above) with respect to the dome-shaped cover 93 from this posture (the state shown in FIG. 9A), the tip of the kneading blade 101 is moved to the open posture shown in FIG. Protrudes greatly from the dome-shaped cover 93. The opening angle of the kneading blade 101 in this opening posture is limited by the second stopper portion 93 c (see FIG. 8B) provided on the inner surface of the dome-shaped cover 93. When the second engagement body 103b (fixed to the support shaft 100), which will be described in detail later, is unable to rotate by hitting the second stopper portion 93c provided on the inner surface of the dome-shaped cover 93, the kneading blade 101 is at its maximum. The opening angle.

When the kneading blade 101 is in the folded position, the complementary kneading blade 102 is aligned with the kneading blade 101 as shown in FIGS. 5 and 7A, for example. The size becomes larger.

Incidentally, as shown in FIG. 6, a first engagement body 103 a constituting the cover clutch 103 is attached to the unit shaft 91 between the pulverization blade 92 and the seal cover 98. For example, a substantially rectangular opening 103aa is formed in the first engagement body 103a made of, for example, zinc die casting, and the first rectangular body 103 in the lower side of the unit shaft 91 is fitted into the opening 103aa so that the first The engaging body 103a is attached to the unit shaft 91 so as not to be relatively rotatable. The first engaging body 103a is fitted from the lower side of the unit shaft 91 prior to the crushing blade 92, and the stopper member 94 prevents the unit shaft 91 from dropping off together with the crushing blade 92. In the present embodiment, the washer 104 is disposed between the first engagement body 103a and the seal cover 98 in consideration of prevention of deterioration of the first engagement body 103a. However, the washer 104 is not necessarily provided. It does not have to be provided.

Further, a second engagement body 103b constituting the cover clutch 103 is attached to the lower side of the support shaft 100 to which the kneading blade 101 is attached. For example, a substantially rectangular opening 103ba is formed in the second engaging body 103b made of zinc die casting, and the second engaging member is fitted into the opening 103ba by fitting a substantially rectangular portion in plan view on the lower side of the support shaft 100. The united body 103b is attached to the support shaft 100 so as not to be relatively rotatable. In the present embodiment, the washer 105 is arranged on the upper side of the second engagement body 103b in consideration of prevention of deterioration of the second engagement body 103b. However, the washer 105 is not necessarily provided.

The cover clutch 103 composed of the first engagement body 103a and the second engagement body 103b functions as a clutch for switching whether or not to transmit the rotational power of the blade rotation shaft 82 to the dome-shaped cover 93. The cover clutch 103 is a rotation direction of the blade rotation shaft 82 when the kneading motor 50 rotates the driving shaft 11 (this rotation direction is referred to as “forward rotation”. In FIGS. 8A and 8B, the rotation is counterclockwise. 9A and 9B, the rotational power of the blade rotation shaft 82 is transmitted to the dome-shaped cover 93. Conversely, the rotation direction of the blade rotation shaft 82 when the crushing motor 60 rotates the drive shaft 11 (this rotation direction is referred to as “reverse rotation”. FIGS. 8A and 8B rotate clockwise, and FIGS. 9A and 9B show rotation directions). Then, the cover clutch 103 does not transmit the rotational power of the blade rotating shaft 82 to the dome-shaped cover 93.

As described above, the direction in which the kneading motor 50 rotates the driving shaft 11 is opposite to the direction in which the grinding motor 60 rotates the driving shaft 11. Therefore, there is a concern that the automatic bread maker 1 is damaged due to the kneading motor 50 and the grinding motor 60 being driven simultaneously. However, since the automatic bread maker according to the present embodiment is configured such that the kneading motor 50 and the crushing motor 60 are not driven simultaneously (details will be described later), it is possible to prevent such damage.

Hereinafter, the operation of the cover clutch 103 will be described in more detail. When the kneading blade 101 is in the folded position (for example, the state shown in FIGS. 8A and 9A), the engagement portion 103bb of the second engagement body 103b is the engagement portion 103ab of the first engagement body 103a (although there are two in this embodiment). It is an angle that interferes with the rotation trajectory (see FIG. 8A). Therefore, when the blade rotation shaft 82 rotates in the forward direction, the first engagement body 103 a and the second engagement body 103 b are engaged, and the rotational power of the blade rotation shaft 82 is transmitted to the dome-shaped cover 93.

On the other hand, when the kneading blade 101 is in the open posture (for example, the state shown in FIGS. 8B and 9B), the engagement portion 103bb of the second engagement body 103b deviates from the rotation trajectory of the engagement portion 103ab of the first engagement body 103a. (See the broken line in FIG. 8B). For this reason, even if the blade rotation shaft 82 rotates, the first engagement body 103a and the second engagement body 103b are not engaged. Accordingly, the rotational power of the blade rotation shaft 82 is not transmitted to the dome-shaped cover 93.

For example, as shown in FIGS. 5 and 6, the dome-shaped cover 93 is formed with a window 93d that communicates the space inside the cover and the space outside the cover. The window 93d is arranged at a height equal to or higher than the grinding blade 92. In the present embodiment, a total of four windows 93d are arranged at intervals of 90 °, but other numbers and arrangement intervals can be selected.

Further, a total of four ribs 93e are formed on the inner surface of the dome-shaped cover 93 so as to correspond to the windows 93d. Each rib 93e extends obliquely from the vicinity of the center of the dome-shaped cover 93 to the outer peripheral annular wall with respect to the radial direction, and the four ribs 93e form a kind of bowl shape. Moreover, each rib 93e is curving so that the side which faces the bread raw material pressed toward it may become convex.

Further, a removable guard 106 is attached to the lower surface of the dome-shaped cover 93. The guard 106 covers the lower surface of the dome-shaped cover 93 and prevents the user's finger from approaching the grinding blade 92. The guard 106 is formed of, for example, an engineering plastic having heat resistance, and can be a molded product such as PPS (polyphenylene sulfide). The guard 106 need not be provided, but is preferably provided so that the user can use it with peace of mind.

For example, as shown in FIG. 6, at the center of the guard 106, there is a ring-shaped hub 106a through which a stopper member 94 fixed to the unit shaft 91 is passed. Further, a ring-shaped rim 106b is provided at the periphery of the guard 106. The hub 106a and the rim 106b are connected by a plurality of spokes 106c. Between the spokes 106c, there is an opening 106d through which the grain to be crushed by the pulverizing blade 92 is passed. The opening 106d has a size that prevents a finger from passing through.

When the spoke 106 c of the guard 106 is attached to the dome-shaped cover 93, the spoke 106 c comes into close proximity with the grinding blade 92. The guard 106 is shaped like an outer blade of a rotary electric razor, and the grinding blade 92 is shaped like an inner blade.

A total of four columns 106e (not limited to this configuration) are integrally formed at the periphery of the rim 106b at intervals of 90 °. A horizontal groove 106ea having one end dead end is formed on a side surface of the pillar 106e facing the center side of the guard 106. The guard 106 is attached to the dome-shaped cover 93 by engaging the grooves 106 ea with the projections 93 f formed on the outer periphery of the dome-shaped cover 93 (all four are arranged at intervals of 90 °). . The groove 106ea and the protrusion 93f are provided so as to constitute a bayonet connection.

As described above, in the automatic bread maker 1 of the present embodiment, since the crushing blade 92 and the kneading blade 101 are incorporated into one unit (blade unit 90), the handling thereof is convenient. The user can easily pull out the blade unit 90 from the blade rotating shaft 82, and can easily clean the blade after the bread making operation. Further, the pulverizing blade 92 provided in the blade unit 90 is detachably attached to the unit shaft 91, and is easily mass-produced and has excellent maintainability such as blade replacement.

Further, in the automatic bread maker 1 of the present embodiment, since a liquid such as water is put in the bread container 80, the bearing 95 is preferably a sealed structure so that the liquid does not enter the bearing 95. In this respect, in the automatic bread maker 1, since the bearing 95 is accommodated in the concave accommodating portion 931 provided in the dome-shaped cover 93, the sealing means (the sealing material 97 and the sealing material 97 and the sealing material only on the inner surface side of the dome-shaped cover 93) If the cover 98) is provided, a structure for sealing the bearing 95 is obtained. For this reason, it is not necessary to provide sealing means above and below the bearing 95, and the seal structure of the bearing 95 can be downsized. For this reason, in the automatic bread maker 1, it is possible to suppress an adverse effect on the shape of the baked bread (for example, the bottom surface of the bread is greatly recessed).

FIG. 10 is a block diagram showing the configuration of the automatic bread maker of the first embodiment. As shown in FIG. 10, the control operation in the automatic bread maker 1 is performed by the control device 120. The control device 120 includes, for example, a microcomputer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an I / O (input / output) circuit unit, and the like. . The control device 120 is preferably disposed at a position that is not easily affected by the heat of the baking chamber 30. Further, the control device 120 is provided with a time measuring function, and temporal control in the bread manufacturing process is possible. The control device 120 is an example of a control unit of the present invention.

The control device 120 includes the operation unit 20 described above, the temperature sensor 15 that detects the temperature of the baking chamber 30, a motor drive circuit 121, a heater drive circuit 122, a first solenoid drive circuit 123, and a second A solenoid drive circuit 124 is electrically connected.

The motor drive circuit 121 is a circuit for driving each of the kneading motor 50 and the pulverization motor 60 under a command from the control device 120, and includes a power supply unit 121a, a switching unit 121b, and a supply current detection unit 121c. ,including. The power supply unit 121 a can supply power for driving the kneading motor 50 and the crushing motor 60. The switching unit 121b can electrically and mechanically connect the power supply unit 121a and any one of the kneading motor 50 and the pulverizing motor 60, and can switch these connections. The supply current detection unit 121 c detects the magnitude (supply current value) of the current supplied from the power supply unit 121 a to the kneading motor 50 or the grinding motor 60 and inputs the detection result to the control device 120. Moreover, the control apparatus 120 confirms the abnormality of the switching part 121b by acquiring the detection result output from the supply current detection part 121c.

The power supply unit 121a is an example of the power supply unit of the present invention, the switching unit 121b is an example of the switching unit of the present invention, and the supply current detection unit 121c is an example of the detection unit of the present invention. . Details of the circuit configuration of the motor drive circuit 121 including the power supply unit 121a, the switching unit 121b, and the supply current detection unit 121c will be described later. Details of the operation for confirming the abnormality of the switching unit 121b by the control device 120 will also be described later.

The heater drive circuit 122 is a circuit for controlling the operation of the sheathed heater 31 under a command from the control device 120. The first solenoid drive circuit 123 controls the driving of the automatic charging solenoid 16 that is driven to automatically input a part of the bread ingredients in the course of the bread manufacturing process, under a command from the control device 120. It is a circuit for. The second solenoid drive circuit 124 is a clutch solenoid 73 (see FIGS. 3A and 3B) used when switching the state of the clutch 56 (see FIGS. 3A and 3B) under a command from the control device 120. It is a circuit for controlling the drive of.

The control device 120 reads a program relating to a bread manufacturing course (breadmaking course) stored in a ROM or the like based on an input signal from the operation unit 20, and a kneading blade by the kneading motor 50 via the kneading motor driving circuit 121. 101, the rotation of the complementary kneading blade 102, the rotation of the grinding blade 92 by the grinding motor 60 through the motor drive circuit 121, the heating operation by the sheathed heater 31 through the heater drive circuit 122, the first solenoid While the operation control of the movable hook 42c by the automatic closing solenoid 16 is performed via the driving circuit 123 and the switching control of the clutch 56 is performed by the clutch solenoid 73 via the second solenoid driving circuit 124, The manufacturing process is executed.

(Operation of automatic bread machine)
The operation of the automatic bread maker 1 configured as described above (hereinafter referred to as bread making operation) will be described. Here, the operation of the automatic bread maker 1 will be described by taking as an example a case where bread is produced by using the rice grain as a starting material by the automatic bread maker 1.

When the rice grain is used as a starting material, a bread-making course for rice grain is executed. FIG. 11 is a schematic diagram showing the flow of the rice grain bread-making course executed by the automatic bread maker of the first embodiment. As shown in FIG. 11, in the bread making course for rice grains, the dipping process, the crushing process, the pause process, the kneading (kneading) process, the fermentation process, and the baking process are sequentially performed in this order. The

In starting the bread making course for rice grains, the user attaches the blade unit 90 to the blade rotation shaft 82 by covering the blade rotation shaft 82 of the bread container 80 with the unit shaft 91. Then, the user weighs rice grains, water, and seasonings (eg, salt, sugar, shortening, etc.) by a predetermined amount and puts them into the bread container 80.

Also, the user weighs the bread ingredients that are automatically input during the bread manufacturing process and puts them in the container body 42a of the bread ingredient storage container 42. When the user stores the bread ingredients to be stored in the container main body 42a, the container lid 42b is supported by the movable hook 42c so that the opening of the container main body 42a is closed by the container cover 42b.

In addition, as a bread raw material accommodated in the bread raw material storage container 42, gluten, dry yeast, etc. are mentioned, for example. Instead of gluten, for example, at least one of flour, thickener (eg, guar gum), and upper fresh powder may be stored in the bread ingredient storage container 42. In addition, for example, only dry yeast may be stored in the bread raw material storage container 42 without using gluten, wheat flour, thickener, super fresh powder or the like. Further, in some cases, for example, salt, sugar and shortening seasonings such as salt, sugar and shortening are stored in the bread ingredient storage container 42 together with, for example, gluten and dry yeast so as to be automatically introduced during the bread manufacturing process. It may be. In this case, the bread raw material previously put into the bread container 80 is rice grains and water (in place of mere water, for example, a liquid having a taste component such as soup stock, a liquid containing fruit juice or alcohol, etc.) Become.

After this, the user puts the bread container 80 into the baking chamber 30 and further attaches the bread raw material storage container 42 to a predetermined position of the lid 40. Then, the user closes the lid 40, selects the rice grain breadmaking course using the operation unit 20, and presses the start key. Thereby, the control apparatus 120 starts control operation | movement of the bread-making course for rice grains which manufactures bread using a rice grain as a starting material.

When the bread making course for rice grain is started, the dipping process is started by a command from the control device 120. In the dipping process, the bread raw material previously put in the bread container 80 is set in a stationary state, and the stationary state is maintained for a predetermined time (30 minutes in the present embodiment). This dipping process is a process aimed at making the rice grains easy to be pulverized to the core in the subsequent pulverization process by adding water to the rice grains.

The water absorption rate of rice grains varies depending on the temperature of the water. If the water temperature is high, the water absorption rate increases, and if the water temperature is low, the water absorption rate decreases. For this reason, you may make it fluctuate | variate the time of an immersion process with the environmental temperature etc. in which the automatic bread maker 1 is used, for example. Thereby, it becomes possible to suppress the dispersion | variation in the water absorption degree of a rice grain. Further, in order to shorten the immersion time, the sheathed heater 31 may be energized to increase the temperature of the firing chamber 30.

Further, the grinding blade 92 may be rotated at the initial stage of the dipping process, and further, the grinding blade 92 may be intermittently rotated thereafter. If it does in this way, the surface of a rice grain can be damaged, and the liquid absorption efficiency of a rice grain will be improved.

When the predetermined time has elapsed, the dipping process is terminated by the command of the control device 120, and the pulverizing process for pulverizing the rice grains is started. In this crushing step, the crushing blade 92 is rotated at a high speed (for example, 7000 to 8000 rpm) in a mixture containing rice grains and water.

In this crushing step, the control device 120 controls the crushing motor 60 to rotate the blade rotation shaft 82 in the reverse direction (clockwise rotation in FIGS. 8A and 8B, and counterclockwise rotation in FIGS. 9A and 9B). The controller 120 drives the clutch solenoid 73 before driving the grinding motor 60 so that the clutch 56 shuts off the power (the state shown in FIG. 3A).

When the blade rotation shaft 82 is rotated in the reverse direction to rotate the grinding blade 92, the dome-shaped cover 93 also starts to rotate following the rotation of the blade rotation shaft 82. The rotation of the cover 93 is immediately blocked (stopped). It is preferable that the pulverizing blade 92 is rotated at a low speed in the initial stage of the pulverization process and then rotated at a high speed.

The rotation direction of the dome-shaped cover 93 accompanying the rotation of the blade rotation shaft 82 for rotating the grinding blade 92 is the counterclockwise direction in FIGS. 9A and 9B, and the kneading blade 101 has been folded until then (see FIG. 9A). In the case of the posture shown in FIG. 9B, the resistance is changed to the open posture (posture shown in FIG. 9B) due to the resistance received from the mixture containing rice grains and water.

When the kneading blade 101 is in the open position, the engagement portion 103bb of the second engagement body 103b deviates from the rotation trajectory (see the broken line in FIG. 8B) of the engagement portion 103ab of the first engagement body 103a. For this purpose, the cover clutch 103 disconnects the blade rotation shaft 82 from the dome-shaped cover 93. Further, as shown in FIG. 9B, a part of the kneading blade 101 in the open posture (more precisely, the buffer material 107 provided on the tip side) is formed on the inner wall of the bread container 80 (specifically, the grinding efficiency is improved). The rotation of the dome-shaped cover 93 is prevented (stopped) in order to abut against the bowl-shaped convex portion 80b provided on the inner wall of the bread container 80 for improvement.

In the crushing process, vibration is generated while the crushing blade 92 is rotating. However, since the cushioning material 107 is in contact with the pan container 80, the collision sound generated by the vibration is reduced. It has become.

The pulverization of the rice grains in the pulverization step is performed in a state in which water is soaked in the rice grains by the previously performed immersion step, so that the rice grains can be easily pulverized to the core. In the present embodiment, the rotation of the pulverizing blade 92 in the pulverization step is intermittent. This intermittent rotation is performed, for example, in a cycle of rotating for 30 seconds and stopping for 5 minutes, and this cycle is repeated 10 times. In the last cycle, the stop for 5 minutes is not performed. The rotation of the crushing blade 92 may be continuous rotation, but for the purpose of, for example, preventing the temperature of the raw material in the bread container 80 from becoming too high, it is preferable to perform intermittent rotation.

In the pulverization step, the pulverization of the rice grains is performed in the dome-shaped cover 93 that has stopped rotating, and therefore the possibility that the rice grains scatter outside the bread container 80 is low. Further, the rice grains entering the dome-shaped cover 93 from the opening 106d of the guard 106 in the rotation stopped state are sheared between the stationary spoke 106c and the rotating pulverizing blade 92, so that the pulverization can be performed efficiently. Further, the rib 93e provided on the dome-shaped cover 93 suppresses the flow of the mixture containing rice grains and water (flow in the same direction as the rotation of the grinding blade 92), so that the grinding can be performed efficiently.

Further, the mixture containing the pulverized rice grains and water is guided in the direction of the window 93d by the ribs 93e, and discharged from the window 93d to the outside of the dome-shaped cover 93. Since the rib 93e is curved so that the side facing the mixture pressing toward it is convex, the mixture hardly stays on the surface of the rib 93e and flows smoothly toward the window 93d. Further, instead of the mixture being discharged from the inside of the dome-shaped cover 93, the mixture existing in the space above the concave portion 81 enters the concave portion 81 and passes through the opening portion 106d of the guard 106 from the concave portion 81. Enter the cover 93. Since the pulverization by the pulverization blade 92 is performed while being circulated as described above, the pulverization can be performed efficiently.

In the automatic bread maker 1, the crushing process is completed in a predetermined time (in this embodiment, 50 minutes). However, the grain size of the pulverized powder may vary depending on the hardness of the rice grains and the environmental conditions. For this reason, the end of the pulverization process may be determined based on the magnitude of the load of the pulverization motor 60 (for example, it can be determined by the control current of the motor).

When the pulverization process is completed, the pause process is executed according to a command from the control device 120. This pause process is provided as a cooling period during which the temperature of the contents in the bread container 80 raised by the crushing process is lowered. The reason for lowering the temperature is that the next kneading step is carried out at a temperature at which the yeast is active (for example, around 30 ° C.). In the present embodiment, the pause process is a predetermined time (30 minutes). However, in some cases, the pause process may be performed until the temperature of the bread container 80 reaches a predetermined temperature.

When the pause process is completed, the kneading process is started by a command from the control device 120. Note that before the kneading motor 50 is driven, the control device 120 drives the clutch solenoid 73 so that the clutch 56 transmits power (the state shown in FIG. 3B). The control device 120 starts driving the kneading motor 50 to rotate the blade rotation shaft 82 in the forward direction (counterclockwise rotation in FIGS. 8A and 8B and clockwise rotation in FIGS. 9A and 9B).

When the blade rotation shaft 82 is rotated in the forward direction, the grinding blade 92 is also rotated in the forward direction, and the bread ingredients around the grinding blade 92 flow in the forward direction. Accordingly, when the dome-shaped cover 93 moves in the forward direction (clockwise in FIGS. 9A and 9B), the kneading blade 101 receives resistance from the non-flowing bread ingredients and is folded from the open position (see FIG. 9B). Change the angle to (see FIG. 9A). Thereby, the engaging portion 103bb of the second engaging body 103b has an angle that interferes with the rotation trajectory (see the broken line in FIG. 8A) of the engaging portion 103ab of the first engaging body 103a. Then, the cover clutch 103 connects the blade rotation shaft 82 and the dome-shaped cover 93, and the dome-shaped cover 93 enters a state of being driven in earnest by the blade rotation shaft 82. The dome-shaped cover 93 and the kneading blade 101 in the folded position rotate together with the blade rotation shaft 82 in the forward direction.

In order to surely connect the cover clutch 103 described above, the rotation of the blade rotation shaft 82 at the initial stage of the kneading process is preferably intermittent rotation or low speed rotation. Further, as described above, when the kneading blade 101 is in the folded position, the complementary kneading blade 102 is arranged on the extension of the kneading blade 101, so that the kneading blade 101 is enlarged and the bread raw material is pressed strongly. It is. For this reason, the dough can be kneaded firmly.

The rotation of the kneading blade 101 (this term is used as an expression including the complementary kneading blade 102 in the folded position, the same applies hereinafter) is very slow in the initial stage of the kneading process, and the speed is increased stepwise. Control is performed by the control device 120. In the initial stage of the kneading process in which the kneading blade 101 rotates very slowly, the control device 120 drives the automatic charging solenoid 16 so that the movable hook 42c of the bread ingredient storage container 42 supports the container lid 42b. Let go. Thereby, the opening of the container main body 42a is opened, and for example, bread ingredients such as gluten and dry yeast are automatically charged into the bread container 80.

As described above, the bread raw material storage container 42 is provided with a coating layer inside the container body 42a and the container lid 42b to improve slipping, and is devised so that there is no uneven portion inside. Yes. Furthermore, the situation where the bread raw material is caught by the packing 42d is also suppressed by the device for arranging the packing 42d. For this reason, the automatic charging is completed with almost no bread ingredients remaining in the bread ingredient storage container 42.

In this embodiment, the bread ingredients stored in the bread ingredient storage container 42 are charged while the kneading blade 101 is rotating. However, the present invention is not limited to this, and the kneading blade 101 is stopped. You may decide to throw in in the state which is carrying out. However, as in this embodiment, it is preferable to add the bread ingredients while the kneading blade 101 is rotated because the bread ingredients are uniformly dispersed.

After the bread ingredients stored in the bread ingredient storage container 42 are put into the bread container 80, the bread ingredients are kneaded into a dough connected to one having a predetermined elasticity by the rotation of the kneading blade 101. Go. When the kneading blade 101 swings the dough and knocks it against the inner wall of the bread container 80, an element of “kneading” is added to the kneading. As the kneading blade 101 rotates, the dome-shaped cover 93 also rotates. When the dome-shaped cover 93 rotates, the rib 93e formed on the dome-shaped cover 93 also rotates, so that the bread material in the dome-shaped cover 93 is quickly discharged from the window 93d and the kneading blade 101 kneads the bread. Assimilate into a lump of material.

In the kneading process, the guard 106 also rotates in the forward direction together with the dome-shaped cover 93. The spoke 106c of the guard 106 has a shape in which the center side of the guard 106 precedes and the outer peripheral side of the guard 106 follows when rotating in the forward direction. For this purpose, the guard 106 rotates in the forward direction to push the bread ingredients inside and outside the dome-shaped cover 93 outward with the spokes 106c. Thereby, the ratio of the raw material used as a waste after baking bread can be reduced.

Further, the pillar 106e of the guard 106 has a side surface 106eb (see FIG. 6) which is the front surface in the rotation direction when the guard 106 rotates in the forward direction, and is inclined upward. Bread ingredients are sprung upward on the front surface of the column 106e. For this reason, the ratio of the raw material which becomes waste after baking bread can be reduced.

In the automatic bread maker 1, a predetermined time (10 minutes in this embodiment) obtained experimentally as a time for obtaining bread dough having a desired elasticity is employed as the time for the kneading process. However, if the time of the kneading process is constant, the degree of bread dough may vary depending on the environmental temperature or the like. For this reason, for example, a configuration in which the end point of the kneading process is determined based on the magnitude of the load of the kneading motor 50 (for example, it can be determined by the control current of the motor) may be used.

In addition, when bread containing ingredients (for example, raisins, nuts, cheese, etc.) is baked, the ingredients may be introduced during the kneading process.

When the kneading process is completed, the fermentation process is started by a command from the control device 120. In this fermentation process, the control device 120 controls the sheathed heater 31 to maintain the temperature of the baking chamber 30 at a temperature at which fermentation proceeds (for example, 38 ° C.). Then, the dough is left for a predetermined time (in this embodiment, 60 minutes) in an environment in which fermentation proceeds.

In some cases, in the middle of this fermentation process, the kneading blade 101 may be rotated to perform degassing or rounding of the dough.

When the fermentation process is finished, the firing process is started by a command from the control device 120. The control device 120 controls the sheathed heater 31 to increase the temperature of the baking chamber 30 to a temperature suitable for baking (for example, 125 ° C.). Then, the control device 120 performs control so that the bread is baked in a baking environment for a predetermined time (in this embodiment, 50 minutes). The end of the firing process is notified to the user by, for example, a display on the liquid crystal display panel of the operation unit 20 or a notification sound. When the user detects the completion of bread making, the user opens the lid 40 and takes out the bread container 80 to complete the bread production.

In addition, the bread in the bread container 80 can be taken out by, for example, directing the opening of the bread container 80 obliquely downward. Simultaneously with the removal of the bread, the blade unit 90 attached to the blade rotation shaft 82 is also removed from the bread container 80. At the bottom of the bread, burn marks of the kneading blade 101 of the blade unit 90 and the complementary kneading blade 102 (projecting upward from the recess 81 of the bread container 80) remain. However, since the dome-shaped cover 93 and the guard 106 are accommodated in the recess 81, they are prevented from leaving a large burn mark on the bottom of the bread.

(Motor drive circuit)
Next, the circuit configuration of the motor drive circuit 121 will be described with reference to the drawings while giving specific examples. FIG. 12 is a circuit diagram of the motor drive circuit 121. As shown in FIG. 12, the motor drive circuit 121 of this example includes an AC power supply P (power supply unit) and a triac TRI (power adjustment unit) corresponding to the power supply unit 121a (see FIG. 10) described above, and the switching described above. A relay RY corresponding to the section 121b (see FIG. 10) and a current transformer CT corresponding to a part of the above-described supply current detection section 121c. These are connected in series to the kneading motor 50 and the grinding motor 60.

The AC power source P is a power source that supplies, for example, AC power supplied from a commercial power source (or AC power obtained by adjusting power supplied from the commercial power source). In the triac TRI, its two main electrodes are connected in series to the AC power source P, the kneading motor 50 and the grinding motor 60, and a drive signal output from the control device 120 is input to the control electrode.

For example, the control device 120 inputs a pulsed or continuous drive signal (current signal larger than the holding current of the triac TRI) to the control electrode of the triac TRI, thereby turning the triac TRI into a conductive state (ON). The triac TRI conducts the alternating current from when the drive signal is input to the control electrode until the alternating current supplied by the alternating current power supply P and input to the main electrode becomes zero. Therefore, the control device 120 partially supplies the AC power supplied from the AC power supply P to the kneading motor 50 or the grinding motor 60 by inputting a pulsed drive signal to the control electrode of the TRIAC TRI. Can do. On the other hand, the controller 120 can supply the AC power supplied from the AC power source P to the kneading motor 50 or the grinding motor 60 substantially as it is by inputting a continuous drive signal to the control electrode of the TRIAC TRI. it can.

Note that the control device 120 determines the timing for inputting the pulse-shaped drive signal to the control electrode of the triac TRI based on the zero cross signal (the signal indicating the timing at which the voltage of the AC power supplied from the AC power supply P becomes 0). It doesn't matter. In this case, the control device 120 can easily control the amount of AC power supplied to the kneading motor 50 or the grinding motor 60 by turning on the triac TRI.

The current transformer CT includes a primary side coil L1 connected in series to the AC power supply P, the triac TRI, the kneading motor 50 and the grinding motor 60, and a magnetic field generated by passing a current through the primary side coil L1. And a secondary coil L2 that generates a current. One end of the secondary coil L2 is grounded, and the anode of the diode D1 is connected to the other end. The other end of the resistor R1 whose one end is grounded is connected to the cathode of the diode D1. The connection node between the resistor R1 and the diode D1 is connected to the other end of the capacitor C grounded at one end, and a voltage signal (detection result; current supplied to the kneading motor 50 or the grinding motor 60) appearing at the connection node. A signal indicating a value) is input to the control device 120.

The diode D1 and the capacitor C rectify and smooth the current generated in the secondary coil L2 (convert alternating current into direct current). The resistor R1 generates a signal that can be acquired by the control device 120 by converting the current signal into a voltage signal. The diode D1, the resistor R1, and the capacitor C are examples of the detection result generation circuit of the present invention. Further, the current transformer CT, the diode D1, the resistor R1, and the capacitor C in this example correspond to the above-described supply current detection unit 121c (see FIG. 10).

The control device 120 acquires the detection result, which is an analog voltage signal obtained as described above, and converts it into a digital signal. As a result, the control device 120 can check the magnitude of the alternating current supplied by the alternating current power supply P and the triac TRI.

The relay RY includes an AC power supply P and a triac TRI, a switch Sry that can switch an electrical and mechanical connection with any of the kneading motor 50 and the grinding motor 60, and a control coil Lry that controls the connection of the switch Sry. Prepare. The control coil Lry has one end grounded and connected to the anode of the diode D2, and the other end connected to the cathode of the diode D2. For example, the switch Sry connects the AC power supply P and the triac TRI to the kneading motor 50 when no current is passed to the control coil Lry, and the AC power supply P and the triac TRI when the current is passed to the control coil Lry. The grinding motor 60 is connected.

The collector of the PNP transistor TR is connected to the connection node between the other end of the control coil Lry and the cathode of the diode D2. One end of the resistor R2 is connected to the emitter of the transistor TR, and a DC power source VE (for example, a power source that generates and supplies DC power based on AC power supplied from a commercial power source) is connected. The other end of the resistor R2 is connected to the base of the transistor TR, and one end of the resistor R3 is connected to the connection node. The control device 120 outputs a switching signal for controlling switching of the relay RY to the other end of the resistor R3.

For example, when the control device 120 outputs a switching signal having a voltage (low) that is low enough to turn on the transistor (conducting between the emitter and the collector), the direct current supplied from the direct current power source VE is passed to the control coil Lry, The AC power supply P, the triac TRI, and the grinding motor 60 are connected. On the other hand, when the control device 120 outputs a switching signal having a voltage (high) that is high enough to turn off the transistor (non-conduction between the emitter and the collector), the DC current supplied from the DC power supply VE is passed to the control coil Lry. First, the AC power supply P and the triac TRI and the kneading motor 50 are connected.

With this configuration, when the control device 120 does not output a switching signal (high impedance), the AC power supply P and the triac TRI are connected to the kneading motor 50 (the motor that rotates the driving shaft 11 at a low speed), and the grinding motor ( Since a motor that rotates the driving shaft 11 at a high speed is not connected, it is preferable from the viewpoint of ensuring safety.

With the above configuration, it is possible to detect the magnitude of the AC current supplied from the AC power supply P and the TRIAC TRI and input it to the control device 120 with a simple configuration. In addition, with a simple configuration, the AC power supply P and the triac TRI can be electrically and mechanically connected to any one of the kneading motor 50 and the grinding motor 60, and the connection can be switched.

Next, details of the confirmation operation of the abnormality of the relay RY by the control device 120 will be described with reference to the drawings while giving specific examples. FIG. 13 is a flowchart showing an operation for confirming a relay abnormality by the control device. Note that the confirmation operation of the control device 120 shown in FIG. 13 can be performed in each step included in the manufacturing course described above (for example, each step obtained by subdividing the step shown in FIG. 11). Note that it is assumed that neither the kneading motor 50 nor the grinding motor 60 is driven in one step.

As shown in FIG. 13, the control device 120 controls the relay RY to connect the AC power supply P, the triac TRI, and the kneading motor 50 to supply (drive) AC power to the kneading motor 50 (STEP1, YES), a detection result (a signal indicating the magnitude of the AC current supplied by the AC power supply P and the triac TRI) is acquired.

The control device 120 confirms the detection result (value obtained by the above-mentioned AD conversion) at every predetermined timing (for example, every 144 ms) (STEP 2). And the control apparatus 120 confirms whether the confirmed detection result is more than the threshold value A continuously X times or more (STEP3).

The threshold value A is a value that cannot be confirmed when the kneading motor 50 is driven by supplying AC power. When AC power is supplied to the pulverization motor 60, a detection result equal to or higher than the threshold A can be confirmed by the control device 120. Further, X times is the number of times that a state where a value that is suddenly greater than or equal to the threshold value A can be excluded can be excluded. For example, when the control device 120 confirms the detection result every 144 ms, X times may be set to 7 times.

The control device 120 is a case where the confirmed detection result does not continuously exceed the threshold A for X times or more (STEP 3, NO), and when the driving of the kneading motor 50 is not finished (STEP 4, NO), STEP 2 Return to and continue to check the detection results. On the other hand, the control device 120 is a case where the confirmed detection result does not continuously exceed the threshold value A more than X times (STEP 3, NO), and when the driving of the kneading motor 50 is finished (STEP 4, YES). Then, the manufacturing course is advanced to perform the next process (STEP 5), and the confirmation operation in the current process is terminated.

On the other hand, the control device 120 indicates that the connection state of the relay RY is abnormal (for example, the AC power supply P, for example) when the confirmed detection result is a value equal to or greater than the threshold value A for X times or more (STEP 3, YES). And the triac TRI and the grinding motor 60 are erroneously connected), the manufacturing course is stopped (STEP 6), and the confirmation operation is terminated. At this time, the control device 120 may notify the user that the manufacturing course has been canceled due to an abnormality by a display on the liquid crystal display panel of the operation unit 20 or a notification sound.

Thus, when the control device 120 controls to drive the kneading motor 50, the control device 120 stops the bread making operation if it determines that the connection state of the relay RY is abnormal based on the detection result. Therefore, for example, it is possible to prevent the control device 120 from driving the grinding motor 60 by mistake.

Further, the control device 120 suddenly detects a detection result indicating that the connection state is abnormal although the connection state of the relay RY is correct (the AC power supply P, the triac TRI and the kneading motor 50 are connected). Therefore, it is possible to suppress stopping the bread making operation.

Further, the control device 120 controls the relay RY to connect the AC power supply P and the triac TRI and the grinding motor 60 to supply (drive) AC power to the grinding motor 60 (STEP1, NO and STEP7, YES). ), The detection result is acquired in the same manner as in the above STEP 2 (STEP 8). And the control apparatus 120 confirms whether the confirmed detection result is below the threshold value B continuously Y times or more (STEP9).

The threshold value B is a value that cannot be confirmed when the pulverization motor 60 is driven by supplying AC power. Note that when AC power is supplied to the kneading motor 50, a detection result equal to or lower than the threshold value B can be confirmed by the control device 120. Y times is the number of times that a state in which a value less than or equal to the threshold value B can be taken suddenly and transiently (when rotation of the grinding motor 60 starts) can be excluded. For example, when the control device 120 confirms the detection result every 144 ms, the Y times may be 15 times.

Note that, as in this example, the number of times that the control device 120 determines that the connection state of the relay RY is abnormal is such that the detection result indicating that the connection state of the relay RY is abnormal is unlikely to occur transiently ( It is preferable to set (X <Y) so that the case where the abnormality is likely to occur transiently (set to number Y) is larger than (set to number X). Thereby, control device 120 can more accurately determine that the connection state of relay RY is abnormal.

The control device 120 is a case where the detected result that has been confirmed does not continuously become the value of the threshold value B or more continuously Y times (STEP 9, NO), and when the driving of the crushing motor 60 is not finished (STEP 10, NO), STEP 8 Return to and continue to check the detection results. On the other hand, the control device 120 is a case where the confirmed detection result does not continuously become a value equal to or less than the threshold value B for more than Y times (STEP 9, NO), and when the driving of the grinding motor 60 is finished (STEP 10, YES). Then, the manufacturing course is advanced to perform the next process (STEP 5), and the confirmation operation in the current process is terminated.

On the other hand, the control device 120 indicates that the connection state of the relay RY is abnormal (for example, the AC power supply P) when the confirmed detection result is a value equal to or less than the threshold value B continuously for Y times or more (STEP 9, YES). And the triac TRI and the kneading motor 50 are erroneously connected), the manufacturing course is stopped (STEP 11), and the confirmation operation is terminated. At this time, the control device 120 may notify the user that the manufacturing course has been canceled due to an abnormality by a display on the liquid crystal display panel of the operation unit 20 or a notification sound.

As described above, when the control device 120 performs control to drive the grinding motor 60, if the connection state of the relay RY is determined to be abnormal based on the detection result, the bread making operation is stopped. Therefore, for example, it is possible to prevent the controller 120 from driving the kneading motor 50 by mistake.

Further, the control device 120 detects that the connection state of the relay RY is correct (the AC power supply P and the grinding motor 60 are connected), but the detection result indicating that the connection state is abnormal is sudden and transient. Therefore, it is possible to suppress stopping the bread making operation.

Further, in a process in which neither the kneading motor 50 nor the grinding motor 60 is driven (STEP 1, NO and STEP 7, NO), the control device 120 advances the manufacturing course without confirming the detection result (STEP 5).

As described above, the relay RY electrically and mechanically connects the AC power source P and the triac TRI to any one of the kneading motor 50 and the grinding motor 60. That is, it is possible to prevent the AC power supply P and the TRIAC TRI from being connected to both the kneading motor 50 and the grinding motor 60 and supplying AC power to each of them. Therefore, each of the kneading motor 50 and the crushing motor 60 can be driven accurately.

Furthermore, the kneading motor 50 and the grinding motor 60 are prevented from being driven simultaneously by the relay RY. Therefore, it is possible to prevent the automatic bread maker 1 from being damaged by the kneading motor 50 and the grinding motor 60 being driven simultaneously.

2. Second Embodiment Next, an automatic bread maker according to a second embodiment will be described. The automatic bread maker of the second embodiment is generally the same as the configuration of the automatic bread maker 1 of the first embodiment. For this reason, about the structure of the automatic bread maker of 2nd Embodiment, it concentrates and demonstrates a characteristic part. In addition, the same code | symbol is attached | subjected and demonstrated to the part which overlaps with the automatic bread maker 1 of 1st Embodiment.

FIG. 14 is a block diagram showing the configuration of the automatic bread maker of the second embodiment. FIG. 15 is a circuit diagram showing a motor drive circuit provided in the automatic bread maker of the second embodiment. As can be seen from FIGS. 14 and 15, the automatic bread maker of the second embodiment includes a power supply state detection circuit 125 that detects the state of the power supply unit 121aa of the motor drive circuit 121 (an example of the power supply state detection unit of the present invention). It differs from the structure of 1st Embodiment by the point provided with. An AC power supply P (see FIG. 15) that supplies power for driving the kneading motor 50 and the grinding motor 60 corresponds to the power supply unit 121aa.

The power supply state detection circuit 125 generates a signal indicating the state of the AC power supply P and inputs it to the control device 120 (an example of the abnormality detection unit of the present invention). As a signal indicating the state of the AC power supply P, for example, a signal indicating the magnitude of the voltage of the AC power supplied by the AC power supply P (for example, an effective value, hereinafter referred to as a power supply voltage value) or the AC power supply P is supplied. A signal indicating the frequency (for example, 50 Hz or 60 Hz, hereinafter referred to as a power supply frequency) of AC power to be used can be employed. It should be noted that other signals may be adopted as the signal indicating the state of the AC power supply P. However, for the sake of concrete explanation, a case where the power supply state detection circuit 125 can output the above two signals will be exemplified.

The power supply state detection circuit 125 may use any known circuit for generating a signal indicating the power supply voltage value. For example, the power supply state detection circuit 125 performs full-wave rectification on the AC power supplied from the AC power supply P by a diode bridge or the like, and smoothes the obtained pulsating current with a capacitor or the like. You may output as a signal to show. In this case, the control device 120 can check the power supply voltage value by measuring the voltage value of this signal.

Further, the power supply state detection circuit 125 may use any known circuit in order to generate a signal indicating the power supply frequency. For example, when the signal is a zero cross signal (a signal indicating the timing at which the voltage of the AC power supplied from the AC power supply P becomes 0), the power supply state detection circuit 125 converts the AC power supplied from the AC power supply P to a diode bridge or the like. Full-wave rectification is performed, and the obtained pulsating current is passed through the light-emitting diode of the photocoupler, and the signal obtained by binarizing and inverting the signal appearing in the phototransistor phototransistor with an inverter or the like is output as a signal indicating the power supply frequency It doesn't matter. In this case, the control device 120 can confirm the power supply frequency by measuring the number of times that this signal becomes high within a predetermined time (that is, the number of zero cross points).

Incidentally, the control device 120 of this embodiment can detect any abnormality of the kneading motor 50 and the crushing motor 60. However, in the following, for the sake of concrete explanation, a case where the control device 120 detects an abnormality of the crushing motor 60 that is highly necessary to detect the abnormality as described above will be exemplified. In addition, when the controller 120 detects an abnormality of the kneading motor 50, a method similar to that when detecting an abnormality of the pulverization motor 60 described later may be applied.

Hereinafter, the detection operation of the abnormality of the grinding motor 60 by the control device 120 will be described with reference to the drawings while giving a specific example. FIG. 16 is a flowchart showing an operation of detecting an abnormality of the grinding motor by the control device. Note that the detection operation of the control device 120 shown in FIG. 16 is performed in each process included in the bread manufacturing course described in the description of the first embodiment (for example, each process obtained by subdividing the process shown in FIG. 11). ) Can be performed.

As shown in FIG. 16, when driving the crushing motor 60 (STEP1, YES), the control device 120 uses the AC power supply P based on the signal input from the power supply state detection circuit 125 (see FIGS. 14 and 15). Are checked (power supply voltage value and power supply frequency), and a threshold is set (STEP 2). Further, the control device 120 checks the supply current value based on the signals input from the supply current detection unit 121b (see FIG. 14; in FIG. 15, the current transformer CT, the diode D1, the resistor R1, and the capacitor C) ( (Step 3).

The threshold value is a value that can be compared with the supply current value. If the supply current value is equal to or greater than the threshold value, the crushing motor 60 is abnormal (for example, an excessive current is generated in the motor drive circuit 121 due to locking or the like). It is a value that can be determined to be highly likely. For example, the control device 120 records a table of candidate values (respective threshold values corresponding to each power supply voltage value and each power supply frequency) obtained in advance by experiments or the like, and supports both the confirmed power supply voltage value and power supply frequency. The threshold value is set by reading out the candidate value obtained from the table.

In the above table, when the power supply frequency is the same, the power supply voltage value is within a predetermined range (for example, within a range excluding a value close to the lower limit and a value close to the upper limit, in other words, an intermediate range). The larger the value, the larger the candidate value. In the case of this example, if the power supply voltage value is outside the above predetermined range, the candidate value becomes substantially constant (stops raising and stopping) even if the power supply voltage value fluctuates. Also, if the power supply frequency is different, the candidate value may be different even when the power supply voltage value is the same. As described above, since the control device 120 sets the threshold value suitable for the power supply voltage value and the power supply frequency, it is possible to detect the abnormality of the motor with high accuracy.

For example, when the table as described above is employed, the control device 120 supplies the normal power to the AC power supply P when the AC power supply P supplies power smaller than normal and the grinding motor 60 has an abnormality. Thus, it is possible to detect the abnormality of the grinding motor 60 without being confused with the case where the grinding motor 60 is normal. Similarly, when the AC power supply P supplies power larger than normal and the pulverization motor 60 has no abnormality, the control device 120 supplies normal power and the pulverization motor 60 has abnormality. It is possible not to be confused with and not to detect anomalies.

The above STEP2 and STEP3 are performed every predetermined timing (for example, every 144 ms). And the control apparatus 120 confirms whether the confirmed supply current value is more than a threshold value continuously X times or more (STEP4). This X times is the number of times that a state where the supply current value can suddenly take a threshold value or more can be excluded. For example, when the control device 120 sets a threshold value every 144 ms and confirms the supply current value, X may be set to 7 times.

If the confirmed supply current value does not continuously exceed the threshold value X times or more (STEP 4, NO) and the driving of the crushing motor 60 is not finished (STEP 5, NO), the control device 120 is STEP 2. Return to, and continue to set the threshold and confirm the supply current value. On the other hand, the control device 120 is the case where the confirmed supply current value does not continuously exceed the threshold value X times or more (STEP 4, NO), and when the driving of the grinding motor 60 is finished (STEP 5, YES). Then, the manufacturing course is advanced to perform the next process (STEP 6), and the abnormality detection operation of the grinding motor 60 in the current process is terminated.

With this configuration, it is possible to suppress the control device 120 from detecting an abnormality and inhibiting the operation of the automatic bread maker until the supply current value suddenly exceeds the threshold value.

On the other hand, in the control device 120, when the confirmed supply current value continuously exceeds the threshold value X times or more (STEP 4, YES), the crushing motor 60 is abnormal (for example, locked). Thus, the manufacturing course is stopped (STEP 7), and the abnormality detection operation of the grinding motor 60 is terminated. At this time, the control device 120 may notify the user that the manufacturing course has been canceled due to an abnormality by a display on the liquid crystal display panel of the operation unit 20 or a notification sound. In STEP 7, if the control device 120 stops the supply of power to the grinding motor 60 by stopping the drive signal to the triac TRI (see FIG. 15), the manufacturing course is set as described above. It may be stopped or stopped (trying to resume the manufacturing course after a predetermined time has elapsed).

In the process of not driving the grinding motor 60 (STEP 1, NO), the control device 120 advances the manufacturing course without setting the threshold value or confirming the supply current value (STEP 6).

As described above, the control device 120 sets a reference (a threshold value in the above-described specific example) corresponding to a change in the state of the power supply (in the above-described specific example, the AC power supply P), and the motor ( In the specific example described above, an abnormality of the grinding motor 60) is detected. Therefore, it is possible to detect abnormality of the motor with high accuracy according to the state of the power source. Therefore, the safety of the automatic bread maker can be improved and the occurrence of failure can be suppressed. As described above, in the pulverization step, the driving shaft 11 needs to be rotated at a high speed, and the pulverization motor 60 may be locked in order to pulverize the cereal grains (rice grains). However, in the automatic bread maker of this embodiment, the control device 120 can detect an abnormality (lock) of the crushing motor 60. Therefore, it is possible to effectively increase the safety of the automatic bread maker and effectively suppress the occurrence of failure.

The configuration example of the motor drive circuit 121 shown in FIG. 15 includes a common drive system (current transformer CT, diode D1, resistor R1, capacitor C, and triac TRI) for the kneading motor 50 and the grinding motor 60. A configuration for selecting a motor to be selected (relay RY, diode D2, transistor TR, resistor R2, and resistor R3) is provided, but the following modifications are also possible. For example, it does not have a configuration for selecting a motor to be driven, but has a separate drive system, and the control device 120 controls each drive system (particularly, the triac TRI) to select the kneading motor 50 and the grinding motor 60. However, it may be configured to drive automatically. However, with the configuration as shown in FIG. 15, the AC power supply P and the triac TRI and any of the kneading motor 50 and the grinding motor 60 are electrically and mechanically connected. Therefore, for example, even if a malfunction of the control device 120 occurs, it is preferable because both the kneading motor 50 and the grinding motor 60 are prevented from being driven.

In the above description, the case where the control device 120 detects an abnormality of the pulverization motor 60 has been mainly described. However, as described above, the control device 120 detects the abnormality of the pulverization motor 60 (see FIG. 16). It is possible to detect an abnormality in the kneading motor 50 by a similar method. However, in this case, it is preferable that the control device 120 records a table (candidate value) corresponding to the kneading motor 50 and sets a threshold different from that in the case of detecting an abnormality of the grinding motor 60.

3. Third Embodiment Next, an automatic bread maker according to a third embodiment will be described. The automatic bread maker of the third embodiment is generally the same as the configuration of the automatic bread maker 1 of the first embodiment. For this reason, about the structure of the automatic bread maker of 3rd Embodiment, it concentrates and demonstrates a characteristic part. In addition, the same code | symbol is attached | subjected and demonstrated to the part which overlaps with the automatic bread maker 1 of 3rd Embodiment.

FIG. 17 is a block diagram showing the configuration of the automatic bread maker according to the third embodiment. FIG. 18 is a circuit diagram showing a motor drive circuit provided in the automatic bread maker of the third embodiment. As can be seen from FIGS. 17 and 18, the automatic bread maker of the third embodiment is provided with a power frequency detection circuit 126 (power frequency detection unit) that detects the power frequency of the power source 121 aa of the motor drive circuit 121. Different from the configuration of the first embodiment. An AC power supply P (see FIG. 18) that supplies power for driving the kneading motor 50 and the grinding motor 60 corresponds to the power supply unit 121aa. Further, the triac TRI in FIG. 18 corresponds to the supply power adjustment unit 121ab (see FIG. 17) that adjusts the magnitude of the alternating current supplied to the kneading motor 50 and the crushing motor 60.

Incidentally, the kneading process performed mainly by driving the kneading motor 50 is greatly affected by the power frequency. Specifically, when the power supply frequency is low (for example, 50 Hz), the bread dough may be insufficiently kneaded as compared to when the power supply frequency is high (for example, 60 Hz).

Therefore, the control device 120 suppresses the influence of the power supply frequency by adjusting the length of the kneading process according to the power supply frequency detected by the power supply frequency detection circuit 126 (see FIGS. 17 and 18). Specifically, the control device 120 eliminates the shortage of kneading of the bread dough by increasing the time of the kneading process as the power frequency detected by the power frequency detecting circuit 126 is smaller. Details of a method for adjusting the length of the kneading process by the control device 120 (control method for driving the kneading motor 50) will be described below.

It should be noted that the influence of the power supply frequency can also occur mainly in the pulverization process driven by the pulverization motor 60. For this reason, the control device 120 may adjust the length of the pulverization step (for example, the longer the pulverization step is, the lower the power frequency is), as in the kneading step. However, the influence of the power supply frequency in the pulverization process is smaller than the influence of the power supply frequency in the kneading process. Therefore, adjustment of the length of the pulverization process by the control device 120 can be unnecessary (the difference in the length of the manufacturing course caused by the difference in the power supply frequency can be reduced).

In the configuration shown in FIGS. 17 and 18, the control device 120 inputs the pulsed drive signal to the control electrode of the triac TRI so that the AC power supplied from the AC power source P is converted into the kneading motor 50 or the grinding motor 60. Can be partially supplied. Thus, for example, the control device 120 intermittently adjusts the length and frequency of the pulsed drive signal input to the triac TRI, thereby rotating the kneading motor 50 or the crushing motor 60 and the driving state (intermittent driving). Or continuous drive).

On the other hand, the controller 120 can supply the AC power supplied from the AC power source P to the kneading motor 50 or the grinding motor 60 substantially as it is by inputting a continuous drive signal to the control electrode of the TRIAC TRI. it can. Thereby, for example, the control device 120 can continuously drive the kneading motor 50 or the grinding motor 60 by continuously inputting a continuous drive signal to the control electrode of the triac TRI. Further, the control device 120 adjusts the length of time for which the continuous drive signal is continuously input to the control electrode of the triac TRI, thereby adjusting the length of time for continuously driving the kneading motor 50 or the grinding motor 60. Can be adjusted. The “continuous driving” of the kneading motor 50 or the pulverizing motor 60 is, for example, a continuous driving for 1 minute or longer, preferably 2 minutes or longer, and more preferably 2 minutes 30 seconds or longer.

The power supply frequency detection circuit 125 generates a signal indicating the power supply frequency (for example, 50 Hz or 60 Hz) of the AC power supply P and inputs the signal to the control device 120. For example, the power frequency detection circuit 125 generates a zero cross signal and inputs it to the control device 120.

The power supply frequency detection circuit 125 may use any known circuit in order to generate a zero cross signal. For example, the power supply frequency detection circuit 125 performs full-wave rectification on the AC power supplied from the AC power supply P by a diode bridge or the like, passes the obtained pulsating current to the light emitting diode of the photocoupler, and converts the signal appearing in the phototransistor of the photocoupler A zero-cross signal may be generated by binarization and inversion with the above. In this case, the control device 120 can confirm the power supply frequency by measuring the number of times that this signal becomes high within a predetermined time (that is, the number of zero cross points).

Incidentally, as described above, when the kneading motor 50 is continuously driven, it is greatly affected by the power supply frequency. Specifically, when the power supply frequency is low (for example, 50 Hz), the rotation of the kneading motor 50 may be insufficient compared to when the power supply frequency is high (for example, 60 Hz).

Therefore, the control device 120 suppresses the influence of the power supply frequency by adjusting the length of time for continuously driving the kneading motor 50 according to the power supply frequency detected by the power supply frequency detection circuit 125. Specifically, the control device 120 eliminates insufficient rotation of the kneading motor 50 by increasing the time during which the kneading motor 50 is continuously driven as the power frequency detected by the power frequency detecting circuit 125 is lower.

Specifically, for example, in one process included in the above-described kneading process, the control device 120 drives the kneading motor 50 continuously for 8 minutes after confirming that the power supply frequency is 60 Hz. On the other hand, in the said process, if the control apparatus 120 confirms that a power supply frequency is 50 Hz, it will drive the kneading motor 50 continuously for 9 minutes. As described above, when the control device 120 confirms that the power supply frequency is low, the controller 120 increases the time for continuously driving the kneading motor 50 by, for example, about 30 seconds to 1 minute.

Further, even when the kneading motor 50 is continuously driven, a process in which the continuous driving time is long is particularly greatly affected by the power supply frequency. Therefore, the control device 120 adjusts the length of time for at least the step of continuously driving the kneading motor for the longest time. Thereby, it is possible to effectively suppress the influence of the power supply frequency that occurs when the kneading motor 50 is continuously driven.

When the controller 120 continuously inputs a continuous drive signal to the TRIAC TRI so that the kneading motor 50 is continuously driven, the frequency of the AC power supplied by the AC power supply P is determined by the kneading motor 50. Directly affects the behavior of In this case, there is less room for the control device 120 to adjust the AC power supplied to the kneading motor 50. However, even in such a case, the control device 120 adjusts the length of time for which the kneading motor 50 is continuously driven, thereby suppressing the influence of the power frequency generated when the kneading motor 50 is continuously driven. It becomes possible.

Even when the crushing motor 60 is continuously driven, the influence of the power supply frequency can occur. Therefore, similarly to the kneading motor 50 described above, the control device 120 adjusts the length of time for continuous driving (for example, adjustment for increasing the time for which the crushing motor 60 is continuously driven as the power frequency decreases). You may do. However, the influence of the power supply frequency in the crushing motor 60 is smaller than the influence of the power supply frequency in the kneading motor 50. Therefore, adjustment of the length of time for which the crushing motor 60 is continuously driven by the control device 120 can be unnecessary (reducing the difference in the length of the manufacturing course caused by the difference in the power supply frequency). can do).

As described above, the control device 120 suppresses the influence of the frequency of the AC power supplied from the AC power supply P by adjusting the length of time for driving the motor (for example, the kneading motor 50). Therefore, the configuration of the motor (for example, the kneading motor 50) and the driving device (for example, the motor driving circuit 121) and the driving method of the motor (for example, the kneading motor 50) can be simplified. Therefore, it becomes possible to suppress the difference in the performance of the automatic bread maker 1 caused by the difference in the frequency of the AC power supplied from the AC power supply P by a simple method.

The configuration example of the motor drive circuit 121 shown in FIG. 18 includes a common drive system (current transformer CT, diode D1, resistor R1, capacitor C, and triac TRI) for the kneading motor 50 and the grinding motor 60. A configuration for selecting a motor to be selected (relay RY, diode D2, transistor TR, resistor R2, and resistor R3) is provided, but the following modifications are also possible. For example, it does not have a configuration for selecting a motor to be driven, but has a separate drive system, and the control device 120 controls each drive system (particularly, the triac TRI) to select the kneading motor 50 and the grinding motor 60. However, it may be configured to drive automatically. However, when configured as shown in FIG. 18, the AC power supply P and the triac TRI and any one of the kneading motor 50 and the grinding motor 60 are electrically and mechanically connected. Therefore, for example, even if a malfunction of the control device 120 occurs, it is preferable because both the kneading motor 50 and the grinding motor 60 are prevented from being driven.

4). Others The embodiment of the automatic bread maker described above is an exemplification of the present invention, and the configuration of the automatic bread maker to which the present invention is applied is not limited to the embodiment described above.

For example, in the embodiment described above, the connection between the AC power supply P and the triac TRI and any of the kneading motor 50 and the grinding motor 60 can be switched as a configuration including the relay RY, but the same operation is realized. Any other configuration may be used as long as it can be obtained. Similarly, in the embodiment described above, a signal indicating the supply current value is generated by the current transformer CT, the diode D1, the resistor R1, and the capacitor C. However, as long as the same operation can be realized, Other configurations may be used. Similarly, in the embodiment described above, the AC power supplied to the kneading motor 50 or the pulverization motor 60 is controlled by the triac TRI. However, other configurations may be used as long as the same operation can be realized. It does not matter.

In the embodiment described above, the configuration and operation of the automatic bread maker have been described by taking as an example the case where rice grains are used as a starting material. However, the present invention is also applicable when grain grains other than rice grains such as wheat, barley, straw, buckwheat, buckwheat, corn, and soybean are used as starting materials.

Moreover, in the above, the case where the rice grain (grain grain) was used as a starting material was shown, However, the automatic bread maker of embodiment shown above uses grain flours, such as wheat flour and rice flour, as a starting material, for example. Bread can also be produced. When wheat flour or rice flour is used as a starting material, the grinding blade 92 is not necessary. In this case, a bread container or a blade unit different from those shown above may be used.

Moreover, in the above, although illustrated about the automatic bread maker 1 which can perform all the processes concerning the manufacture of bread, such as a dough manufacturing process (dipping process, crushing process and kneading process), fermentation process and baking process, The automatic bread maker of the present invention is not necessarily limited to one capable of executing all these steps. For example, among the above steps, those that cannot execute at least one step except the dough manufacturing step can be included in the automatic bread maker of the present invention. In this case, the configuration related to the process that cannot be executed (for example, the sheathed heater 31 and the heater driving circuit 122) may not be provided in the automatic bread maker. In addition, the operation of the automatic bread maker that can execute only a part of the bread manufacturing process (for example, the bread dough manufacturing process) in this way is similar to the operation of the automatic bread maker of the above-described embodiment. Is the action.

The present invention is suitable for an automatic bread maker for home use.

1 Automatic bread machine 11 Drive shaft 50 Kneading motor (first motor)
60 Crushing motor (second motor)
80 Bread container 82 Blade rotating shaft 92 Grinding blade 101 Kneading blade 120 Control device (control unit, abnormality detection unit)
121 motor drive circuit 121a power supply unit 121aa power supply unit 121b switching unit 121c supply current detection unit (detection unit)
125 Power supply state detection unit CT Current transformer L1 Primary coil (first coil)
L2 Secondary coil (second coil)
D1 diode D2 diode R1 to R3 resistor C capacitor TR transistor RY relay Sry switch Lry coil (third coil)
P AC power supply TRI Triac

Claims

A driving shaft capable of transmitting rotational power to a bread container in which bread ingredients are charged;
A first motor capable of applying rotational power for rotating at a low speed to the driving shaft;
A second motor capable of applying a rotational power for rotating the driving shaft at a high speed;
A power supply unit capable of supplying power to the first motor and the second motor;
The power supply unit and either the first motor or the second motor can be electrically and mechanically connected, and a switching unit capable of switching the connection;
An automatic bread maker.
The automatic bread maker according to claim 1, wherein a direction in which the first motor rotates the driving shaft and a direction in which the second motor rotates the driving shaft are opposite to each other.
A detection unit for detecting a magnitude of a current supplied by the power supply unit to the first motor or the second motor;
A control unit that controls switching of the switching unit and acquires a detection result of the detection unit;
Further comprising
When the control unit controls the switching unit so that the power supply unit and the first motor are connected, the power supply unit is based on the acquired detection result of the detection unit. 3. The automatic bread maker according to claim 1, wherein the bread making operation is controlled to stop when it is confirmed that a current having a magnitude equal to or greater than the threshold value is supplied.
The control unit is to confirm the detection result of the detection unit for each predetermined timing,
When the control unit controls the switching unit so that the power supply unit and the first motor are connected, the power supply unit is continuously set to the first threshold value for a first number of times or more. 4. The automatic bread maker according to claim 3, wherein the bread making operation is controlled to be stopped when it is confirmed that a current of the above magnitude is supplied.
A detection unit for detecting a magnitude of a current supplied by the power supply unit to the first motor or the second motor;
A control unit that controls switching of the switching unit and acquires a detection result of the detection unit;
Further comprising
When the control unit controls the switching unit so that the power supply unit and the second motor are connected, the power supply unit is based on the acquired detection result of the detection unit. 3. The automatic bread maker according to claim 1, wherein the bread making operation is controlled to be stopped when it is confirmed that a current having a magnitude equal to or less than the threshold value is supplied.
The control unit is to confirm the detection result of the detection unit for each predetermined timing,
When the control unit controls the switching unit so that the power supply unit and the second motor are connected, the power supply unit is continuously connected to the second threshold value for a second number of times or more. 6. The automatic bread maker according to claim 5, wherein when the current of the following magnitude is confirmed to be supplied, the bread making operation is controlled to be stopped.
A detection unit for detecting a magnitude of a current supplied by the power supply unit to the first motor or the second motor;
A control unit that controls switching of the switching unit and acquires a detection result of the detection unit;
Further comprising
The control unit is to confirm the detection result of the detection unit for each predetermined timing,
When the control unit controls the switching unit such that the power supply unit and the first motor are connected, the power supply unit is equal to or greater than a first threshold continuously for a first number of times. When it is confirmed that a current of a magnitude of is supplied, the bread making operation is controlled to stop.
When the control unit controls the switching unit so that the power supply unit and the second motor are connected, the power supply unit is not more than a second threshold continuously for a second number of times or more. When it is confirmed that a current of a magnitude of is supplied, the bread making operation is controlled to stop.
The automatic bread maker according to claim 1 or 2, wherein the second number of times is greater than the first number of times.
The detection unit is
A first coil connected in series to the power supply unit and the first motor and the second motor;
A second coil in which a current is generated by a magnetic field generated by passing a current through the first coil;
A detection result generation circuit for generating a detection result based on a current generated in the second coil and inputting the detection result to the control unit;
An automatic bread maker according to claim 7, comprising:
The switching unit is
A switch for switching connection between the power supply unit and the first motor and the second motor;
A third coil that switches the connection of the switch with or without energization;
The automatic bread maker according to claim 1 or 2, which is a relay including
A power supply state detection unit for detecting a state of a power supply unit included in the power supply unit;
An abnormality detection unit for detecting an abnormality in at least one of the first motor and the second motor;
With
The automatic bread maker according to claim 1, wherein the abnormality detection unit sets a reference for detecting abnormality of the motor as being different depending on a detection result of the power supply state detection unit.
A supply current detector for detecting the magnitude of the current supplied to the motor;
The abnormality detection unit sets a threshold value according to the detection result of the power supply state detection unit as the reference,
11. The abnormality of the motor is detected when the abnormality detection unit confirms that the magnitude of the current supplied to the motor is equal to or greater than the threshold based on a detection result of the supply current detection unit. Automatic bread maker described in 1.
The abnormality detection unit confirms the detection result of the supply current detection unit at every predetermined timing,
The automatic detection according to claim 11, wherein the abnormality detection unit detects an abnormality of the motor when it is confirmed that the magnitude of the current supplied to the motor is equal to or greater than the threshold value continuously for a predetermined number of times or more. Baking machine.
When the voltage supplied by the power supply unit is within a predetermined range,
The automatic bread maker according to claim 11 or 12, wherein the abnormality detection unit sets the threshold value to be larger as the voltage supplied from the power supply unit is larger.
The power supply unit supplies AC power,
The automatic bread maker according to claim 11 or 12, wherein the abnormality detection unit sets the threshold value that can be different depending on a frequency of AC power supplied by the power supply unit.
The abnormality detection unit detects at least an abnormality of the second motor,
The second motor applies rotational power to the drive shaft when the grain put into the bread container is pulverized by a pulverization blade interlocked with the drive shaft. The automatic bread maker according to any one of the above.