JP4779528B2 - Bread machine - Google Patents

Description

  The present invention relates to a bread maker used in general households.

  Conventionally, in this type of bread machine, in order to prevent missetting of the kneading blade, the rotation speed of the kneading blade is measured, and if the rotation speed is greater than a predetermined value, the kneading blade is set incorrectly. In some cases, it is determined that the information has been displayed, and this is displayed to inform the user (see, for example, Patent Document 1).

  FIG. 5 shows a schematic diagram of a conventional automatic bread maker described in Patent Document 1.

  In FIG. 5, a conventional bread maker includes a main body 1, a baking chamber 2, a heater 3, a bread baking mold 4 detachably attached to the main body 1, a motor 5, and a lid 6 that opens and closes the baking chamber 2. And a blade attachment shaft 4a that is rotatably provided in the baking mold 4 and is driven to rotate by a motor 5, a kneading blade 7 that is detachably attached to the blade attachment shaft 4a, and a temperature in the baking chamber 2 are detected. A temperature detection device 8 including a thermistor, a motor control device 9 for driving the motor 5, a heater control device 10 for driving the heater 3, an input device 12 for selecting a menu, a cooking menu, an operation state, and the like are displayed. A rotation speed detection device 31 including a Hall IC that detects the rotation speed of the blade attachment shaft 4a to which the kneading blade 7 is mounted, and a microcomputer for controlling them. And a device 15.

  The operation and operation of the conventional bread maker with the above-described configuration are as follows.

  First, the user attaches the baking mold 4 to the baking chamber 2, attaches the kneading blade 7 to the tip of the blade mounting shaft 4 a, puts a predetermined bread material into the baking mold 4, and uses the input device 12 to make a request. Set the menu and bread baking time, and press the start button (not shown).

  When the operation start time calculated from the set menu and baking time is reached, the motor 5 is operated for a first predetermined time (for example, 5 minutes) and the bread ingredients are put into a dough state, followed by a second predetermined time ( For example, during operation, the rotational speed of the blade attachment shaft 4a is detected by the rotational speed detection device 31. If the kneading blade 7 is properly attached to the tip of the blade mounting shaft 4a and a predetermined bread material is put into the baking mold 4, a predetermined load is applied to the kneading blade 7 and the blade mounting shaft 4a rotates a predetermined amount. Therefore, the bread dough is kneaded and then baked in sequence, and the bread is baked to complete the operation.

If it is forgotten to attach the kneading blade 7 to the tip of the blade mounting shaft 4a, the load due to the bread material is not applied to the blade mounting shaft 4a. The rotation speed is detected by the rotation speed detection device 31, and it is determined that the kneading blade 7 is not set. The fact is displayed on the display device 13 to prompt the user to check and stop the operation. I have to.
JP-A-7-154316

  However, in the configuration of the conventional bread maker, it is necessary to measure the number of rotations of the kneading blades in order to detect forgetting to attach the kneading blades 7, and in order to measure the number of rotations, the blade attachment shaft 4a and It is necessary to place a magnet (not shown) on the circumference of the pulley 4b that rotates integrally, and to attach a Hall IC near the magnet, resulting in a problem that the configuration becomes very complicated and expensive. Was.

  An object of the present invention is to solve the conventional problems described above, and an object of the present invention is to provide a bread maker capable of preventing forgetting to attach kneading blades with an inexpensive configuration.

In order to solve the above-described conventional problems, a bread maker of the present invention includes a baking chamber having a heater, a container that is detachably mounted in the baking chamber, and a rotational motor that is provided in the container and driven by a motor. A kneading blade, a temperature detection device for detecting the temperature in the baking chamber, a control device for controlling the heater and the motor according to the temperature detected by the temperature detection device, and a current detection for detecting a drive current of the motor A current value detected by the current detection device before the bread material is in a dough state at the initial driving of the motor, and stored as a current value 1, and a predetermined time has elapsed from the start of driving of the motor. later, in a state fitted with the kneading blades, if the difference between the sensed current value by the current sensing device at the material bread that Do a dough state and the current value 1 is equal to or lower than a predetermined value Because it is detected as forgetting to install the kneading blades, if the kneading blades are not installed, the bread material will not be in the dough state, so the load applied to the motor is light and the load fluctuation is small, By detecting changes in the motor drive current, it is possible to easily detect forgetting to install the kneading blades, and the current can also be detected with a simple configuration such as a current transformer. A good bread machine can be provided. Furthermore, by looking at the difference between the current 1 that is the driving current of the first motor before the bread dough state and the motor driving current when the bread dough state is reached, it is more stable, It is possible to detect a change in the load applied to the motor, that is, forgetting to attach the kneading blade.

  The bread maker of the present invention has an inexpensive configuration, prevents forgetting to attach the kneading blades, and can always bake the bread deliciously.

1st invention detects the temperature in the said baking chamber, the baking chamber which has a heater, the container mounted | worn detachably in the said baking chamber, the kneading blade provided in the said container, and rotationally driven by the motor A temperature detection device; a control device for controlling the heater and the motor according to a temperature detected by the temperature detection device; and a current detection device for detecting a drive current of the motor. The current detected by the current detection device before the bread material becomes a dough state is stored as a current value 1, and after a predetermined time has elapsed since the start of driving the motor , if the difference between the current value 1 pan material and sensed current value by the current sensing device at that Do a dough state is below a predetermined value, to detect the mounting forget batter blade When the kneading blade is not attached, the bread material does not become a dough state, so the load applied to the motor is light and the load fluctuation is small, so the change in the drive current of the motor is detected. Therefore, it is possible to easily detect forgetting to install the kneading blades and to detect the current with a simple configuration such as a current transformer. Can do.

  Furthermore, by looking at the difference between the current 1 that is the driving current of the first motor before the bread dough state and the motor driving current when the bread dough state is reached, it is more stable, It is possible to detect a change in the load applied to the motor, that is, forgetting to attach the kneading blade.

  In particular, the second invention can change the predetermined value of the first invention. By changing the predetermined value, it is possible to absorb variations in the drive currents of individual motors, and more accurately kneading blades. Can detect forgetting to install.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a schematic view of a bread maker in the first embodiment of the present invention, and FIG. 2 shows an electric circuit block diagram of the bread maker.

1 and 2, reference numeral 1 denotes an automatic bread maker main body, 2 a baking chamber having a heater 3 therein and baking bread, 4 is detachably attached to the baking chamber 2 and serves as a cooking material. A baking mold that serves as a container for storing the bread ingredients, 7 is a kneading blade that is inside the baking mold 4 and kneads the dough, and 5 transmits power through a belt 5a and a pulley 5b to rotate the kneading blade 7. Motor 6, lid for opening and closing firing chamber 2, 8 temperature detector including a thermistor for detecting the temperature in firing chamber 2, 9 motor control device including a triac for driving and controlling motor 5, 10 heater 3 A heater control device including a relay for controlling the driving of the motor, 11 is a current detecting device including a current transformer for detecting the driving current of the motor 5, 12 is an input device for selecting a menu course, and 13 is selected. A display device 15 equipped with a liquid crystal display (hereinafter referred to as an LCD) for displaying a menu course and a completion time, etc., includes a temperature detection device 8, a motor control device 9, a heater control device 10, a current detection device 11, and an input device 12. The control device is equipped with a microcomputer for controlling the LCD 13.

  Further, 14 shown in FIG. 2 is a semi-fixed resistor, and a variable resistance value is transmitted to the control device 15.

  The operation of the bread maker configured as described above will be described.

  In preparation for cooking, the kneading blade 7 is first attached in the baking mold 4, and then the strong powder and thin flour, salt, sugar, powdered milk, dry yeast, egg, and water as cooking ingredients are set. When cooking is started and the kneading process (motor drive) is performed, the kneading blades 7 are rotated by the rotation power of the motor 5 to knead the bread dough in the baking mold 4. After that, when 5 to 10 minutes have passed, the dough is in a dough state.

  Here, when the dough is in a bread dough state, the dough is elastic, and the rotational load of the kneading blades 7 increases. The average current when the motor is driven at that time is 0.75 A at 60 Hz and 0.80 A at 50 Hz. At the start of the kneading process, since the dough is not in the dough state, the average current when driving the motor is 0.66 A or less at 60 Hz and 0.70 A or less at 50 Hz. In addition, when forgetting to attach the kneading blade 7, the dough is not in a bread dough state. Similarly, it becomes 0.66 A or less at 60 Hz and 0.70 A or less at 50 Hz.

  When the kneading process is started and the motor 5 is driven for 5 minutes after 10 minutes have elapsed, the average current when the motor 5 is driven is measured, and when the average current value is 0.66 A or less at 60 Hz. Is detected as forgetting to attach the kneading blade 7.

  When forgetting to attach the kneading blade 7 is detected, the forgetting to attach the kneading blade 7 is displayed on the LCD of the display device 13 as shown in FIG.

  Further, in order to correct the variation in current when each individual motor 5 is driven, the semi-fixed resistor 14 is adjusted so as to reliably detect forgetting to attach the kneading blade 7. Here, when the resistance of the semi-fixed resistor 14 is changed, correction as shown in Table 1 can be performed.

  When the AD value is 96 to 128 bits, it is detected that the kneading blade 7 is forgotten to be installed at 0.66 A at 60 Hz, and when the AD value is 0 to 31 bits, the kneading blade 7 is attached at 0.56 A at 60 Hz. It becomes forgetting detection.

  In this way, by performing detection of forgetting to attach the kneading blade 7, it is possible to notify the user of the setting mistake of the kneading blade 7 at a relatively early stage.

  The current value at the time of driving the motor in the first embodiment is determined by the main body configuration and is not limited to this value. Further, although the drive current of the motor 5 is detected by a current transformer, the drive current of the motor 5 can be detected in the same manner in a configuration in which a resistor is connected in series to detect a voltage.

(Embodiment 2)
FIG. 3 shows a schematic diagram of an automatic bread maker according to the second embodiment of the present invention, and FIG. 4 shows an electric circuit block diagram of the automatic bread maker. In addition, the same code | symbol is attached | subjected to the same component as the bread maker in the said 1st Embodiment, and the description is abbreviate | omitted.

  As shown in FIG. 3 and FIG. 4, the present embodiment is made up of a speaker or the like, and when a forgetting to attach the kneading blade 7 is detected, a notification device 21 for making an announcement to forget to attach the kneading blade 7 by voice is provided. It is provided.

  While the kneading process is started and the motor 5 is driven for 1 minute after 5 minutes have elapsed, the average current when the motor 5 is driven is measured, and the current value is stored as a current value 1. After that, if the measured current value does not become larger than the current value 1 + 0.19 (A) for 5 minutes after 4 minutes have passed, it is determined that the kneading blade 7 is not attached, and the notification device 21 To announce that the kneading blades 7 are not attached.

  Further, in order to correct the variation in current when the motor 5 is driven, the semi-fixed resistor 14 is adjusted so as to reliably detect forgetting to attach the kneading blade 7. Here, if the semi-fixed resistor 14 is changed, the correction shown in Table 2 can be performed.

  When the AD value is 96 to 128 bits, when the current value is 60 Hz and the current value is 1 + 0.19 (A) or less, it is determined that the kneading blade 7 is not attached, and the AD value is 0 to 31 bits. When the current value is 1 + 0.10 (A) or less, it is determined that the kneading blade 7 is not attached.

In this way, the detection of forgetting to attach the kneading blade 7 is memorized by storing the current value 1 of the motor 5 before it becomes bread dough and setting it to the current value 1 + 0.19 (A). A set mistake can be detected.

  Although the current value at the time of driving the motor in the second embodiment is (+0.19) [A], this value is determined by the main body configuration and is not limited to this value.

  As described above, since the bread maker according to the present invention can accurately detect forgetting to install the kneading blades, it can notify the user of the failure of bread cooking as soon as possible. The same applies to products.

Schematic of the bread maker in Embodiment 1 of the present invention Electrical circuit block diagram of the bread machine Schematic of the bread maker in Embodiment 2 of the present invention Electrical circuit block diagram of the bread machine Schematic diagram of conventional bread machine

1 Body 2 Baking chamber 3 Heater 4 Bread baking mold (container)
DESCRIPTION OF SYMBOLS 5 Motor 7 Kneading blade 8 Temperature detection apparatus 11 Current detection apparatus 13 Display apparatus 15 Control apparatus 21 Notification apparatus

Claims (2)

A baking chamber having a heater; a container detachably mounted in the baking chamber; a kneading blade provided in the container and driven to rotate by a motor; a temperature detection device for detecting a temperature in the baking chamber; A control device for controlling the heater and the motor according to the temperature detected by the temperature detection device, and a current detection device for detecting the drive current of the motor, wherein the bread material is in a dough state at the initial drive of the motor The current detected by the current detection device is stored as a current value 1 before becoming a state, and the bread material is in a dough state when the kneading blade is attached after a predetermined time has elapsed since the start of driving the motor. Ltd. difference between the current value 1 and the current value detected by the current sensing device at preparative ing is when more than a predetermined value, which is adapted to detect a mounting forget batter blade Down machine. The bread maker according to claim 1, wherein the predetermined value can be changed.