JPH0318889B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooking machine such as a food processor that cuts meat, vegetables, and fruits, and relates to an operation control mechanism for a rotating body of the cooking machine driven by a motor. be.

Generally, in a cooking machine such as a food processor, food is put into a container, which is rotated by a motor, and cooked by a rotating body provided inside the container. In such a cooking device, it is necessary to control the speed of the rotating body and the operating time depending on the type of food to be cooked. For example, JP-A-55-
Looking at Publication No. 1825, etc., the speed of the rotating body is controlled by means such as controlling the SCR or triax by variable operation of a variable resistor, and changing the number of turns of the field winding of the motor. The conventional method is to use an electric or spring type time switch such as that disclosed in Japanese Patent No. 34903 to control the operating time of the rotating body. However, when the above-mentioned mechanical time switch is used as a means for controlling operating time, it is undeniable that the mechanical time switch is large in size due to its structure, and it is inevitable that it will be subject to space constraints when incorporated into the main body of the cooking machine. can be,
Furthermore, the moving parts of a mechanical switch are sensitive to external conditions, and are therefore unreliable. Furthermore, regarding speed control, if we tried to change the number of turns of the motor's field winding, the motor itself would become huge depending on the number of turns, and the cooker itself could also become larger. A big problem may arise in securing storage space for the cooking machine. Furthermore, if an attempt is made to control the operation of the rotary body in a cooking machine by combining the speed control means and the operation time control means as described above, when the time switch is turned off and the rotary body is to be driven again, the time switch is turned off. It takes time to reconfigure the settings. Regarding the speed control of the rotating body, it goes without saying that the optimum rotation speed and operating time should be selected depending on the type of food to be cooked, but beyond that, various rotation speeds and operating times should be selected depending on the amount of food to be cooked. You need to set the driving time. However, with conventional cooking machines, it is not possible to change the rotation speed and operating time according to the amount of food, which is very inconvenient, as it is necessary to cook a large amount of food in several batches.

The present invention has been made in view of these conventional drawbacks, and an object of the present invention is to provide a cooking machine having a control function that can change the rotational speed and operating time of the rotating body at any time depending on the amount of food to be cooked. It is something to do.

Its composition consists of a main body with a built-in motor,
It has a container that is attached to the main body, and a rotating body that is installed in the container and is driven by the motor, stores data consisting of the rotational speed and operating time of the motor in the order in which they are input, and changes the data as needed according to the data. ,
The cooking machine includes a control unit that transmits a signal to the motor, and the control unit is configured to be able to vary the rotational speed and operating time of the rotating body according to the amount of food to be cooked.

Therefore, even if the rotational speed or operating time settings of the rotating body change irregularly depending on the amount of food to be cooked, it can be converted to the rotational speed or operating time according to the amount of food with a simple operation, and new settings can be made. This is convenient because there is no need to store data in the control unit by key operations or the like.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The cooking machine of the present invention will be explained in detail below based on an embodiment of a food processor, with reference to the drawings.

Reference numeral 1 denotes a main body case, which is composed of a vertically erected motor storage section 2 and a base 3 for storing power transmission members and various electrical transmission parts. A container 4 made of transparent resin is mounted and engaged on the upper surface of the base 3, and a container lid 6 having a material input port 5 hanging therein is fitted into the upper opening of the container.

Although not particularly shown in the container 4, there is a container 4 inside the container 4.
A cutting blade is provided to cut the food to be cooked that is placed inside. This cutting blade is rotated by a motor M provided inside the base 3.

A manual key switch group 7 is provided on the surface of the base 3.
and automatic key switch group 8 and quantity key switch group 9
is provided.

Manual key switch group 7 is at rest P, cutting blade
Low-speed LS provides 1600rpm rotation, medium-speed MS provides 2200rpm rotation, high-speed S provides 3300rpm rotation, low-speed pulse LP provides 0.5msec low-speed continuous operation, and high-speed pulse PH provides 0.5msec high-speed intermittent operation. , 10 second continuous operation key 10S, 1 second continuous operation key 1S, start key STA that starts a series of cooking processes, reset key RES that returns the microcomputer MC (described later) to the initial state, continuous operation key CON, It consists of a temporary stop key HAL that temporarily stops the rotation of the cutting blade midway through.

The automatic key switch group 8 is also provided with ten keys M ₁ to _{M 10} on the surface of the base 3 in order to call up the speed and operating time of the cutting blade suitable for each specific food to be cooked. The surface of each key switch is covered with a flexible cover 10 made of soft vinyl chloride, etc. The end of this cover 10 is welded or glued to the base 3, and the surface of each key switch is It has corresponding printing, so you can tell at a glance what switch it is. Furthermore, in this type of food processor that uses water, the cover 10 can prevent water from entering the key switch groups 7 and 8 , and serves as an extremely good waterproof means, as well as being electrically connected to the outside. Since it is insulated, the risk of short circuit accidents is extremely low.

Furthermore, the amount key switch group 9 is set when the amount of food to be cooked changes, and is used as the amount increase key.
AD, a normal key NO, and a reduction key SU. The increase key AD is used when the amount of food to be cooked is large.
At least either the rotation speed or the operating time of the cutting blade stored in the MC is increased depending on the type of food to be cooked. Normal key NO is pressed when the food to be cooked is standard (4 adult servings). Weight loss key SU
is used when the amount of food to be cooked is small, and by operating this key, at least either the rotational speed of the cutting blade or the operating time previously stored in the microcomputer MC is reduced according to the type of food to be cooked. .

Next, a control circuit for the commutator motor M will be explained according to a circuit diagram of the food processor of the present invention.

First, the commutator motor M is connected to the alternating current power source AC together with the triax TA. A bridge rectifier is installed on the gate side of this triax TA.
BD and photocoupler PH and transistor TR ₁
is connected. However, the photocoupler PH is composed of the light emitting diode LED ₁ and the thyristor SCR, and there is no electrical connection, and only when the light emitting diode LED ₁ turns on and emits light, the light energy activates the thyristor SCR.
is a switching element that conducts. SW
is the main switch, and SS is the safety switch.

Z is a noise absorbing element that removes various radio waves that overlap the current waveform entering the motor M;
Further, it removes minute noises that could not be removed by the triangularly connected capacitor group TC, capacitors C ₁ and C ₂ , resistor R _1, etc., and provides stable drive to the motor M. In particular, the CR circuit composed of a resistor _R1 and a capacitor _C2 serves to prevent mistriggering of the gate signal entering the triact TA.

The MC is a one-chip microcomputer with 4-bit RAM and ROM, which corresponds to the brain of the food processor of the present invention, and stores the data input from the manual key switch group 7 or the automatic key switch group 8 , and stores the data at any time. A signal is output based on the motor M to control the speed and operating time of the motor M. The photocoupler PH is connected to the output port PCO\ of the microcomputer MC via a transistor _TR1 .

The part that branches off on the way from transformer T to diode _D1 is a filter section, which is a variable resistor.
It consists of VR, resistors R ₂ and R ₃ , and capacitors C ₃ , C ₄ , and C ₅ , and orders the current flowing through it, and supplies the current to the operational amplifier OP following this filter section.
Then, due to the action of the op amp OP, the alternating current AC
A 50 Hz or 60 Hz SIN wave is accurately converted and input into the input port of the microcomputer MC as an accurate 20-30 msec rectangular wave. This rectangular wave becomes the reference vibration of the timer in the microcomputer MC, and is the basis for controlling the operating time of the motor M in units of seconds.

Further, from the transformer T through the diode _D2 ,
The circuit that passes through the constant voltage IC, IC, diode D ₃ , Zener diode ZD, and transistor TR ₂ is the constant voltage generation section, which generates a stable constant voltage (+5V) and sends it to the microcontroller MC. The current and voltage are used to promote normal operation of the microcomputer MC.

The automatic key switches _M1 to _M10 are respectively connected to the input ports PAO\~ _PA3 of the microcomputer MC, and the manual key switch group 7 is also connected to the input ports PAO\~PA3, respectively.
Connected to PA ₃ . Of course, the start key STA, reset key RES, and continuous operation key
CON, pause key HAL are also PAO\~PA ₃
It is connected to the. And all the key switches
The microcomputer MC determines which switch is currently pressed in a matrix of 4 rows and 6 columns consisting of input ports consisting of PAO\~ _PA3 and output ports consisting of PCO\~ _PD1 . A corresponding signal is output to the motor M side. However, the quantity key switch group 9 is connected to an input/output port different from the above-mentioned one.

Furthermore, when each key switch is pressed, the diodes D ₄ , D ₅ , D ₆ , D ₇ ,
Current flows through D ₈ , D ₉ and transistors TR ₃ ,
The base voltages of TR ₄ , TR ₅ , TR ₆ , TR ₇ , and TR ₈ drop and the transistors TR ₃ ... TR ₈ become conductive, and the digital display sections DD ₁ , DD ₂ , DD ₃ and the light emitting diodes
LED ₂ , LED ₃ ...LED ₁₁ are turned on as appropriate, and the display corresponding to the pressed key switch is lit.

Next, the operation of the present invention will be explained.

When cooking manually, use the speed keys such as low speed pulse LP, high speed pulse HP, low speed LS, medium speed MS, high speed HS, etc. and the operation time keys 10S and 1S to control the cooking process, which consists of multiple data. Once stored in the RAM of the microcomputer MC, when the start key STA is pressed, the stored data is loaded in order and the operation of the motor M is controlled according to the data.

In addition, when performing automatic cooking, after selecting one of the menu keys _M1 to _M10 , pressing one of the quantity keys 9 and pressing the start key STA, the motor M starts the controlled operation. For example, increase key
When AD is pressed, menu key 8
Of the data loaded from the ROM, the operating time is converted into a signal in the form of standard (4 servings) + α, and the operating time of the motor M is lengthened for each cooking step. When the reduction key SU is pressed, the operating time of the data loaded from the ROM by the menu key 8 is converted into a signal in the form of standard (4 servings) - α, and the operating time of the motor M is set for each cooking step. It is shortened to . Furthermore, when the standard key ( ) is pressed, the data loaded from the ROM by the menu key 8 directly participates in the control of the motor M.
However, not only can the operating time be increased or decreased using the volume keys 9 , but the driving speed of the motor M can also be increased or decreased. When all the cooking steps are completed, the buzzer BEP sounds and the light emitting diode LED ₁₂ lights up.

As described above, the present invention includes a main body containing a motor, a container attached to the main body, and a rotating body internally inside the container and driven by the motor.
In the cooking machine, the cooking machine includes a control section that stores data consisting of the rotational speed and operating time of the motor in the order in which they are input, and transmits signals to the motor at any time according to the data, the control section controlling the amount of food to be cooked. Since the rotating body is configured to be able to vary its rotational speed and operating time according to the amount of food to be cooked, the rotational speed and operating time settings of the rotating body change irregularly depending on the amount of food to be cooked. With a simple operation, it is possible to convert the rotational speed or operating time according to the amount of food into the rotation speed or operation time according to the quantity, and there is no need to store the data in the control unit through new key operations. It has great practical effects, as it eliminates the disadvantages of cooking in several batches or wasting ingredients when cooking for a small number of people.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a food processor according to an embodiment of the present invention, FIG. 2 is a circuit diagram thereof, and FIG. 3 is a flowchart of the operation. M...Motor, 1...Main body, 4...Container,
MC...Microcomputer (control unit).

Claims (1)

[Claims] 1 It has a main body with a built-in motor, a container attached to the main body, and a rotating body built in the container and driven by the motor, and stores data consisting of the rotational speed and operating time of the motor in the order of input. In the cooking machine, the cooking machine includes a control unit that transmits an energization control signal to the motor according to the data at any time, and the control unit changes the rotational speed and operating time of the rotating body according to the amount of food to be cooked. A cooking machine characterized in that it is configured to be able to.