JPH0314442B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is suitable for cutting and cutting food products such as meat, vegetables, and fruits.
The present invention relates to a cooking machine such as a food processor for performing processes such as stirring and kneading, and relates to a drive control mechanism for a rotating body of the cooking machine driven by the motor thereof.

Prior Art For example, Japanese Patent Publication No. 57-28575 discloses a cooking machine according to the present invention which is provided with a data storage unit for speed and time, and a motor is controlled and driven based on the data. Then, reduce the rotation speed of the motor to low →
An example is given in which the speed is increased intermittently from medium speed to high speed. However, as in this example, when the rotation speed is increased during the motor's rest time, it is necessary to supply more power than necessary to the motor due to the load of the food being cooked, and the rotation speed is increased from low speed to medium speed. When the relative speed changes from high speed to high speed, the relative speed is large, causing the ingredients to scatter around the rotating body, making it impossible to efficiently collect the ingredients near the rotating body, resulting in uneven cooking of the ingredients, and the scattered ingredients. It adheres to the container, resulting in waste, and also makes cleaning the container itself troublesome.

Purpose of the Invention The present invention has been made in view of the drawbacks of the prior art as described above, and provides a drive for a rotating body that obtains a uniform finish of the material and prevents the material from being wasted by scattering onto the inner surface of the container. The purpose is to provide a process.

Structure of the Invention A cooking container is placed in a main body case containing a motor, and a rotary body such as a cutting blade stored in the cooking container is rotationally driven by the motor, and the motor is installed in the main body case. The motor can be driven at different rotation speeds such as low speed, medium speed, and high speed by a control section that stores data on the rotation speed and operating time provided and controls the drive of the motor based on the data. Immediately after the start of cooking, the rotational speed of the motor is continuously increased at fixed time intervals in the order of low speed → medium speed → high speed, and then the rotation speed of the motor is controlled and driven according to a series of cooking steps consisting of The feature is that two arbitrary rotational speeds are alternately repeated each time.

Embodiment A cooking machine of the present invention will be explained based on an embodiment of a food processor with reference to the drawings.

Reference numeral 1 denotes a main body case, which is comprised of a vertically erected motor storage section 2 and a base 3 for storing power transmission members and various electrical components. 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 4.

A cutting blade 7 is provided inside the container 4 for cutting the food to be cooked that is put into the container 4. This cutting blade 7 is rotated by a motor M provided inside the motor storage section 2.

A manual key switch group 8 is provided on the surface of the base 3.
and an automatic key switch group 9 are provided. Manual key switch group 8 is set to pause key P and motor M.
Low speed key LS, giving a rotation speed of 1600rpm
Medium speed key MS, giving a rotation speed of 2200rpm
High-speed key HS that provides a rotation speed of 3300 rpm, low-speed pulse key LP that provides low-speed intermittent drive to the motor M every 0.5 to 2 seconds, high-speed pulse key HP that provides high-speed intermittent drive every 0.5 to 2 seconds, and operating time in 10-second increments. 10 second key 10S to set the operation time, 1 second key 1S to set the operating time in 1 second increments, start key ST to start a series of cooking processes (described later), reset key to return the microcomputer MC (described later) to its initial state.
RS, continuous operation key CN for unlimited continuous operation,
It includes a temporary stop key HL that temporarily stops the rotation of the motor M during the cooking process.

Further, the automatic key switch group 9 is an M ₁ switch for recalling the rotational speed and operating time of the motor M suitable for each specific material to be cooked from the memory section of the microcomputer MC.
Ten menu keys of ~ _M10 are also provided on the surface of the base 3.

The surfaces of both key switch groups 8 and 9 are covered with a flexible cover 10 made of soft vinyl chloride or the like. This cover 10 has its end connected to the base 3.
The key switches 8 and 9 are welded or bonded to each other, and their surfaces are printed in correspondence with the two key switches 8 and 9, making it obvious at a glance which switch they are. In addition, the cover 3 can prevent water from entering the key switch groups 8 and 9 in this type of food processor that uses water, etc., 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.

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

First, the motor M is connected to the alternating current power supply AC together with the triax TA. A bridge rectifier BD, a photocoupler PH, and a transistor _TR1 are connected to the gate side of the triac TA. 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.

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 a memory section corresponding to the brain of the food processor of the present invention consisting of 4-bit RAM and ROM, and stores the data input from the manual key switch group 8, and can also read 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 of the microcomputer MC via the transistor _TR1 .
Consists of connected to PG ₀ .

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 it orders the current flowing through it and supplies the current to the operational amplifier OP following this filter section.
Then, by the action of the operational amplifier OP, the AC power supply AC
Accurately converts the 50Hz or 60Hz SIN wave of
Accurate 20~ to the input port of the microcomputer MC
Input as a 30msec square wave. This rectangular wave functions as a 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 constant voltage ICSIC and then passes through diode D ₃ , Zener diode ZD, and transistor TR ₂ is a constant voltage generation section, which generates a stable constant voltage of +5V and sends it to the microcomputer MC.
The power supply voltage is used to promote normal operation of the microcomputer MC.

Each of the automatic key switches M ₁ to _{M 10} is connected to input ports PA ₀ to _{PA 3} of the microcomputer MC, respectively;
The manual key switch groups 8 are also connected to PA ₀ to PA ₃ , respectively. Of course the start key ST,
The reset key RS, continuous operation key CN, and pause key HL are also connected to PA ₀ to PA ₃ . All key switches are arranged in a matrix of 4 rows and 6 columns consisting of input ports PA ₀ to PA ₃ and output ports PC ₀ to _{PD 1} , and the microcontroller determines which switch is currently pressed.
The MC makes a judgment and outputs a corresponding signal to the motor M side.

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 ...} L ₂ ...Turn on L ₁₀ as appropriate to light up the display corresponding to the key switch pressed.

Next, the operation of the present invention will be explained based on the cooking process pattern shown in FIG.

To configure a pattern using manual key switch group 8, press the low speed key LS and press the 1 second key 1S 5 times.Press the medium speed key MS and press the 1 second key 1S 5 times.Press the high speed key HS and press 1. Press the second key 1S 4 times Press the medium speed key MS and press the 1 second key 1S twice Repeat , two more times Press the high speed key HS and press the 1 second key 1S 5 times Press the stop key P The data is stored in the memory section of the microcomputer MC by the operation.

Then, after putting the ingredients to be cooked into the container 4, start cooking by pressing the start key ST.
The motor M gradually increases its speed from low speed to medium speed to high speed according to the stored data. In this process, the ingredients are uniformly stirred and crushed gradually, and then finally crushed all at once at high speed. After this, the rotational speed is changed from high speed to low speed and from low speed to high speed, and this is repeated. Figure 4 A and B show the state of the material at this time. In A, the rotational speed of the motor M decreases from high speed to low speed, and this shows how the material that has started to rise close to the inner peripheral surface of the container 4 descends and collects near the cutting blade 7. be. B shows how the motor M increases its rotational speed from low to high speed, and the material is caught in the bubbles generated by the cutting blade 7 and crushed.

Effects of the Invention As described above, the present invention includes a cooking container placed in a main body case having a built-in motor, a rotary body housed in the cooking container being rotationally driven by the motor, and the motor being connected to the main body case. In a cooking machine whose rotational speed and operating time are controlled by a control unit provided in the case, the motor can be driven at different rotational speeds such as low speed, medium speed, and high speed. The rotation speed of the motor is controlled and driven according to a series of cooking steps consisting of an operating time, and the rotation speed of the motor is increased continuously at fixed time intervals in the order of low speed → medium speed → high speed immediately after the start of cooking, and then at fixed time intervals. Since the device alternates between two arbitrary rotational speeds, as in the conventional cooking machine shown in Fig. 5, the material is flung off and remains on the upper surface of the outer periphery of the container, and there is no rough material that is mixed throughout. ,
When the motor is rotating at a low speed, it moves to the center, and then when the rotation speed is increased to a high speed, it is caught in the bubbles generated by the rotating body and crushed, achieving a uniform finish of the material. In addition, there is little adhesion of materials to the top or surrounding surface of the cooking container due to scattering, and the cooking machine can be easily removed and cleaned.

[Brief explanation of the drawing]

The drawings relate to a food processor according to an embodiment of the present invention, and FIG. 1 is an overview perspective view thereof, FIG. 2 is a circuit diagram thereof, FIG. 3 is a motor drive pattern diagram, and FIG.
Figures A and B are both state diagrams of the inside of the cooking container when the motor is driven, and Figure 5 is a diagram of a conventional example corresponding to Figure 4. M...Motor, 1...Main case, 4...Cooking container, 7...Cutting blade (rotating body), MC...Microcomputer (control unit).

Claims (1)

[Claims] 1. A cooking container is placed in a main body case that has a built-in motor, and a rotating body housed in the cooking container is driven to rotate by the motor, and the motor is controlled by a control section provided in the main body case. Therefore, it is a cooking machine whose rotation speed and operation time are controlled, and the motor can be driven at different rotation speeds such as low speed, medium speed, high speed, etc., and the rotation speed and operation time are controlled. Immediately after the start of cooking, the rotational speed of the motor is continuously increased at regular intervals in the order of low speed → medium speed → high speed, and then the rotational speed is increased at any two arbitrary intervals at regular intervals. A cooking machine that is characterized by alternating cooking.