JPH10192160A - Cooking appliance having rotational function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooking appliance without scattering of or damaging to bread material at the time of starting kneading, or without giving bad influence of intermittent driving of a motor to the bread material by changing motor torque to provide the optimum cooking conditions. SOLUTION: In this cooking appliance an agitating blade is rotated by driving force of a motor 37, so by kneading and mixing subject matter to be cooked by rotation of the agitating blade, rotational resistance of the subject matter is changed in cooking. In this case, capacitors C1, C2 connected to the motor 37 are changed over by a changeover switch 42 to each other, so the capacity of the capacitors C1, C2 is changed to change torque of the motor 37 in accordance with the rotational resistance of the subject matter. The torque of the motor 37 is changed to prevent application of rotational force more than necessity to the subject matter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating body which is rotated by a driving force of a motor, such as a bread maker or a juicer / mixer, and the object to be cooked is stirred and mixed by the rotation of the rotating body. Accordingly, the present invention relates to a cooking appliance having a rotation function of performing cooking such that the rotation resistance of an object to be cooked changes.

[0002]

2. Description of the Related Art Recently, cooking utensils having a rotating function, such as baking machines and juicers / mixers, have become widespread in ordinary households. In such a cooking appliance, for example, a bread maker is
Bread ingredients such as flour, water, and baking powder are put into a baking case, a series of processes such as kneading the bread ingredients in the baking case, baking after primary fermentation and secondary fermentation are controlled by time and temperature. The agitating blade, which is rotationally driven by a motor, is provided in a baking case into which the bread material is charged.

That is, when kneading bread ingredients, the stirring blades are driven to rotate to knead the introduced bread ingredients. Further, the motor that drives the stirring blades to rotate is rotated by a single starting condenser. That is, the motor has a single torque.

In the process of kneading bread ingredients such as flour, water, and baking powder, the viscosity of the bread ingredients changes between the initial stage and the final stage of the kneading. Has a higher viscosity. That is, at the end of the kneading process, a considerable load is applied to the motor that rotates the stirring blade. In order for the kneading to be performed well even when the viscosity is high,
The torque of a conventional bread maker motor is set so that the highest output is obtained when the bread material has the highest viscosity.

[0005]

That is, in the conventional bread maker, since the torque of the motor is set so that the maximum output is obtained when the bread material has the highest viscosity, the flour, water, and baking powder are used. Even in the initial stage of starting the kneading by putting the bread material into the baking case, the motor rotates the stirring blade at the maximum output.
For this reason, in the initial stage of kneading, there is a problem that the unmixed bread material scatters outside the baking case or the bread material is damaged.

[0006] In order to prevent such splattering of the bread material, the motor is turned on / off in the initial stage of kneading.
Intermittent drive by changing the duty ratio of
A device has been devised to reduce the rotational force of the stirring blade. However, even in the case of intermittent drive, the instantaneous torque when the motor is rotating is the same as the torque at the time of the maximum output. This is the case. for that reason,
For bread materials requiring slow and smooth kneading (for example, materials for making castella), intermittent driving of the motor is not always preferable.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to change the torque of a motor so as to obtain optimum cooking conditions, so that an object to be cooked at the start of kneading can be obtained. It is an object of the present invention to provide a cooking utensil having a rotating function that does not cause splattering and that does not adversely affect a cooking object due to intermittent driving of a motor.

[0008]

According to a first aspect of the present invention, there is provided a cooking appliance having a rotating function, wherein a rotating body is rotated by a driving force of a motor, and the rotating body is rotated by the rotation of the rotating body. In a cooking appliance that performs cooking such that the rotational resistance of the object to be cooked changes by stirring and mixing the food, the torque of the motor is changed by changing the capacity of a capacitor connected to the motor. It is varied according to the rotational resistance of the object to be cooked. Further, the cooking utensil having a rotation function according to claim 2 of the present invention rotates the rotating body by the driving force of the motor,
In a cooking appliance that performs cooking in which the rotation resistance of the object to be cooked is changed by stirring and mixing the object to be cooked by the rotation of the rotating body, the motor operates when the rotation resistance of the object to be cooked is greatest. The torque is set so that the maximum output can be obtained, and by changing the capacity of the capacitor connected to the motor set in this way, the unnecessary rotation force is not given to the object to be cooked. Then, the torque of the motor is varied.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a longitudinal sectional view showing a schematic structure of a bread maker according to an embodiment of the present invention, and FIG. 3 is a front view thereof.

The bread maker 1 includes an outer case 3, a bottom case 4 having support legs 5 fitted and fixed to the lower end of the outer case 3, and an oven provided in substantially the upper half of the outer case 3. A kiln body 2 comprising an inner case 6 having an open upper surface forming a chamber is provided. An operation panel 7 having various switches for time setting and baking selection is attached to the front center of the outer case 3, and carrying handles 8, 8 are attached to left and right target positions.

A dome-shaped transparent cover 9 made of transparent glass is attached to the upper opening of the outer case 3 so as to be openable and closable. A forehead frame 10 is attached to a peripheral portion of the lid 9, and the rear side of the forehead frame 10 is attached to the outer case 3.
The cover 9 is provided so as to be openable and closable about a support shaft 12 of the support bracket 11 by being attached to the support bracket 11 attached to the support bracket 11. A grip 13 is integrally formed on the front side of the forehead frame 10.
The grip 9 is used to open and close the lid 9.

A display and switch mounting board 15 and an arithmetic circuit board 16 are disposed inside the front surface of the outer case 3, and the inner case 6 is mounted on the upper surface of a base 18 erected and fixed to the bottom case 4. Is mounted and fixed. Further, inside the inner case 6, there is provided a baking case 20 having an open top for charging, kneading, fermenting and baking by adding bread materials such as flour, water and baking powder.

A plurality of locking claws 21 (approximately two to four) are formed on the bottom of the firing case 20. The locking claws 21 are formed on the bottom of the inner case 6. By engaging and disengaging the plurality of locking pieces 22 (the number corresponding to the number of the locking claws 21) by rotation, it is configured to be removable in the inner case 6. A stirring blade (rotating body) 23 for kneading the introduced bread material is connected to a rotating shaft 24 at the bottom of the baking case 20, and the bread material kneaded by the stirring blade 23 is provided. A ridge 25 is attached to a side surface inside the firing case 20 to prevent the slag from being entrained.

The rotating shaft 24 to which the stirring blade 23 is connected is
Bearing plate 3 sandwiched and fixed between inner case 6 and base 18
5. Also, a bracket 36 is attached to the base 18.
The main motor 37 and the rotating shaft 24 are linked via timing pulleys 38 and 39 and a timing belt 40. The stirring blade 23 is rotated at an appropriate speed by rotating the rotating shaft 24 by a motor 37.

An annular heat ray radiating main heater 26, which is an electric heating member, is provided along the inner peripheral surface of the inner case 6, and an oven sensor 27 for measuring the internal temperature of the inner case 6 is provided. It is attached to an upper front position of the inner wall surface of the inner case 6. In addition to the temperature sensor, a dough sensor 28 for detecting the temperature of the bread material put into the baking case 20 is attached to the upper end of the rotating shaft 24, and the internal temperature of the kiln body 2 is controlled by the yeast bacteria. A thermostat 29, which is a sensor for detecting whether the temperature is equal to or lower than the death temperature, is attached to the outer wall surface of the inner case 6.

FIG. 1 shows an electrical configuration of a main part of the bread maker 1 having the above configuration. That is, outputs of various switches 52 provided on the operation panel 7 are guided to a pan adjustment circuit 51 that controls various operations of the bread maker 1. Although not shown, the operation panel 7 has a menu switch for operating the type of bread (white bread, French bread, cake, etc.), a reservation switch for setting the bread baking time, and a cancel for resetting the initial settings. switch,
A switch for changing the reservation time, a switch for setting a clock, a start switch for starting bread making, a stop switch for stopping the bread making operation, and the like are provided.

One control output of the pan adjustment circuit 51 is connected to the other end of the relay 53 whose one end is connected to the power supply _VDD . And the normally open switch 54 of the release 53
The power supply 55 is supplied to the motor 37 by the ON / OFF control of. The motor 37 includes a plurality of motors connected in parallel with different capacities (in this embodiment,
One end of each of the capacitors C1 and C2 is connected to a common terminal c of the changeover switch 42, and the other end of each of the capacitors C1 and C2 is connected to each of the terminals a and C2 of the changeover switch 42. b. That is, the motor 37 is a permanent capacitor type induction motor capable of switching between the capacitors C1 and C2.

Another control output of the pan adjustment circuit 51 is connected to a changeover control input of a changeover switch 42. In the pan adjustment circuit 51, a data table for controlling switching of the changeover switch 42 is stored in advance. That is, the pan adjustment circuit 51 has a configuration including software operating on a microcomputer,
The data table is stored in the ROM, which is a hardware configuration of the microcomputer, in advance. This data table is data obtained in advance through experiments and the like.

In this embodiment, the capacitances of the capacitors C1 and C2 satisfy C1 <C2. When the common terminal c of the changeover switch 42 is connected to the terminal b, the bread material has the highest viscosity (ie, The torque is set so that the maximum output can be obtained when the rotational resistance of the bread material is the greatest). Also, when the common terminal c of the changeover switch 42 is connected to the terminal a, even when the viscosity of the bread material is low (for example, at the beginning of the kneading of the bread material), an appropriate rotation without scattering the bread material and without damaging it. The torque is set so that a force can be obtained. That is, by changing the capacity of the connected capacitor, the motor 37
Is variable.

Although not shown, the output of the cloth sensor 28 and the output of the thermostat 29 are led to the pan adjustment circuit 51, and the pan adjustment circuit 51 sends a signal to the drive circuit of the main heater 26. A control signal is output.

Next, the operation of the bread maker 1 having the above configuration, particularly the operation of the kneading step, will be described. For example, in the kneading process when baking bread, the viscosity is generally low in the initial stage of kneading bread ingredients such as flour, water, and baking powder, and in the middle to late stages where the bread ingredients are evenly mixed. Will be higher. Therefore, the data table in the pan adjustment circuit 51 includes, for example, 10 kneading steps.
Minutes, the capacitor C1 is connected for the first 5 minutes (that is, the changeover switch 42 is connected to the terminal a).
Then, control data for connecting the capacitor C2 (that is, connecting the changeover switch 42 to the terminal b) is stored for the next 5 minutes.

In the bread maker 1 storing such control data, bread ingredients such as flour, water and yeast are put into the baking case 20, bread is selected by a menu switch on the operation panel 7, and then bread is selected. When the start switch is operated, the bread adjustment circuit 51 loads control data (the above-described control data) for baking bread from the data table into a RAM (not shown) and starts control.

That is, according to the read control data,
The common terminal c of the changeover switch 42 normally connected to the terminal b is connected to the terminal a (the capacitor C1). After that, the pan adjustment circuit 51 turns on the normally open switch 54 by turning on the relay 53 and supplies the power supply 55 to the motor 37. Thereby, the motor 37 is driven by the torque determined by the capacity of the condenser C1 to rotate the stirring blade 23.

At this time, the rotational force of the stirring blade 23 is smaller than the torque determined by the capacity of the capacitor C1, that is, the torque at which the maximum output is obtained when the capacitor C2 is connected. Will be kneaded with a moderate force. That is, kneading is performed by applying an appropriate rotational force to the stirring blade 23 without scattering the bread ingredients and damaging the dough. Further, the rotation of the stirring blade 23 at this time is a smooth rotation at a constant speed, and discontinuous stress is applied to the bread material as in the conventional method of intermittently driving the motor to suppress the rotation of the stirring blade 23. There is no such thing as calling.

If such kneading is continued for 5 minutes, the bread ingredients are kneaded appropriately to form a certain amount of dough. The so-called mixing (mixing) stage enters the heat mixing (kneading) stage. Switches the common terminal c of the changeover switch 42 to the original terminal b side (the capacitor C2 side) at this stage. Thereby, the motor 37
Thereafter, the stirring blade 23 is rotated by driving with a large torque determined by the capacity of the capacitor C2, and the dough in the forming stage is further kneaded to produce a final dough.

The rotating force of the stirring blade 23 at this time is a torque determined by the capacity of the condenser C2, that is, a torque at which the maximum output is obtained. Will be kneaded strongly. That is, the feature of the bread maker 1 of the present invention is that the common terminal c of the change-over switch 42 is normally connected to the terminal b, and when the viscosity of the bread material is the largest, the torque which can obtain the maximum output is obtained. The setting is based on the premise (this is the same as a conventional bread maker). If the set torque has a problem such as the scattering of the bread material, the bread material can be kneaded with a weak force. In order to reduce the torque itself of the motor 37, the changeover switch 4
2 in that the common terminal c is switched to the terminal a.

In the above-described embodiment, the switching control of the changeover switch 42 is performed based on the control data stored in the ROM of the pan adjustment circuit 51.
A current sensor for detecting a load current is attached to the motor 37, the output of this current sensor is converted from analog to digital, and the converted output is taken into the pan adjustment circuit 51.
By comparing to a preset reference value within 1
Switching control from the terminal a to the terminal b may be performed. Further, in some cases, the switching of the changeover switch 42 may be performed manually, and the user himself may switch the timing while watching the timing.

Further, in the above-described embodiment, a bread maker is described as an example. However, for a cooking appliance such as a juicer / mixer, the control is reverse to the control of the above bread maker. In other words, in a juicer / mixer, relatively hard objects such as apples and pineapples are roughly cut and put in, so that it is necessary to set a large motor torque in order to finely crush them. On the other hand, after becoming liquid,
This time, it is necessary to reduce the torque of the motor so as to prevent the liquid object from scattering.

Therefore, when such a juicer / mixer is equipped with a control circuit similar to the circuit configuration shown in FIG. 1 (hereinafter, the description will be made using the reference numerals assigned to the circuit shown in FIG. 1 as necessary). In the data table, for example, if the mixing process is performed for 30 seconds, the capacitor C2 is connected for the first 10 seconds (that is, the changeover switch 42 is connected to the terminal b).
Side, and control data for connecting the capacitor C1 (that is, connecting the changeover switch 42 to the terminal a side) for the next 20 seconds is stored.

In a juicer / mixer in which such control data is stored, objects to be cooked such as apples and pineapples which have been roughly cut are put in, and mixing is started. ) Loads the above control data from the data table into a RAM (not shown) and starts control. That is, according to the read control data, the mixing adjustment circuit keeps the changeover switch 42 in the normal connection state (that is, the state in which the common terminal c is connected to the terminal b side) and makes the relay 53 conductive so that the normally open switch 54 Is turned on, and the power supply 55 is supplied to the motor 37. Thereby, the motor 37 is driven by the torque determined by the capacity of the capacitor C2 to rotate the rotating teeth (corresponding to the stirring blade 23).

At this time, the rotating force of the rotating teeth is a torque determined by the capacity of the capacitor C2, that is, a torque at which the maximum output is obtained. This kind of mixing
If the cooking is continued for 0 second, the object to be cooked becomes almost liquid, so that the mixing adjustment circuit switches the common terminal c of the changeover switch 42 to the terminal a side (the capacitor C1 side) at this stage. As a result, the motor 37 is thereafter switched to the capacitor C1.
, The rotating teeth are rotated by driving with a small torque determined by the capacity of the liquid, and the liquid to be cooked is further mixed.

At this time, the rotating force of the rotating teeth is smaller than the torque determined by the capacity of the capacitor C1, that is, the torque at which the maximum output is obtained when the capacitor C2 is connected. The mixing is performed by applying an appropriate rotational force to the stirring blade 23 so as not to scatter the object to be cooked. In each of the embodiments described above, the number of capacitors C1 and C2 to be switched is described as two. However, it is obvious that the number of capacitors C1 and C2 may be three or more to perform fine switching.

[0033]

According to the cooking utensil of the present invention having a rotation function, the rotating body is rotated by the driving force of the motor, and the object to be cooked is agitated and mixed by the rotation of the rotating body. In a cooking appliance that performs cooking in which the rotation resistance of the object to be cooked is changed, the torque of the motor is varied according to the rotation resistance of the object to be cooked by changing the capacity of a capacitor connected to the motor. doing. According to a second aspect of the present invention, there is provided a cooking utensil having a rotation function, wherein a rotating body is rotated by a driving force of a motor, and the cooking object is agitated and mixed by the rotation of the rotating body. In a cooking appliance that performs cooking in which the rotational resistance of the cooker changes, the motor is set so that the maximum output is obtained when the rotational resistance of the object to be cooked is the largest, and the motor set in this manner is used. By changing the capacity of the condenser connected to the motor, the torque of the motor is varied so as not to apply an excessive rotational force to the object to be cooked. That is, by changing the torque of the motor so as to obtain the optimum cooking conditions, for example, in a bread maker, it is possible to prevent the bread ingredients from scattering at the start of kneading, and to prevent the bread ingredients from being damaged. Further, the object to be cooked can be smoothly kneaded at a constant speed without any adverse effect on the object to be cooked due to the intermittent drive of the motor such as a conventional cooking appliance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a main part of a bread maker according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a schematic structure of a bread maker according to an embodiment of the present invention.

FIG. 3 is a front view showing a schematic structure of a bread maker according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bread maker 37 Motor 42 Changeover switch 51 Pan adjustment circuit C1, C2 Capacitor

Claims (2)

[Claims] 1. A rotating function for rotating a rotating body by a driving force of a motor, stirring and mixing the object to be cooked by the rotation of the rotating body, thereby performing cooking such that the rotation resistance of the object to be cooked is changed. A cooking utensil having a rotation function, wherein the torque of the motor is varied according to the rotation resistance of the object to be cooked by changing the capacity of a capacitor connected to the motor. 2. A rotating function for rotating a rotating body by a driving force of a motor, stirring and mixing the object to be cooked by the rotation of the rotating body, and thereby performing cooking such that the rotation resistance of the object to be cooked is changed. In the cooking utensil having the motor, the torque is set so that the maximum output is obtained when the rotation resistance of the object to be cooked is the largest, and the capacitor connected to the motor set in this manner is A cooking utensil having a rotation function, wherein a torque of the motor is varied by changing a capacity so as not to apply an excessive rotation force to the object to be cooked.