JPS6329491Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oven equipped with a tub having kneading blades in a heating tank and a heater for heating the heating tank.

In this type of conventional oven, flour,
Pour bread ingredients such as water and seasonings into a bucket,
Bread is automatically produced through a series of processes of kneading, yeast fermentation, and baking controlled by a timer. When shaping semi-finished products by hand, it is inconvenient to have to turn off the timer manually during the process, and the bread also freezes if it is not eaten immediately after baking. It was hot. Therefore, in order to eliminate such problems,
In order to prevent the baking process from being performed at the end of the yeast fermentation process, the timer is set to a separate course for only the kneading and yeast fermentation process, and in order to control this course, the timer is provided with another cam switch and a relay, etc. It has been considered to configure a circuit and drive a relay based on the opening and closing of a cam switch, causing the relay to self-hold, thereby forcibly stopping the timer during the yeast fermentation process. Although this is convenient, it has the disadvantage that the timer and circuit become complicated and the cost increases.

The present invention was developed in view of the above circumstances.The purpose of this invention is to use a timer to continuously control the yeast fermentation temperature during the baking process, so that control can be performed with an extremely simple circuit, and the cost is low. Our goal is to provide an oven that does not compromise convenience.

An embodiment of the present invention will be described below with reference to the drawings. First, in FIGS. 1 and 2, 1 is an outer case, 2 is a heating tank whose front side is open, and 3 is a door provided on the front side of the heating tank 2 so as to be openable and closable. 4 is a support plate disposed inside the outer case 1; 5 is a tub support fixed to the upper surface of the support plate 4; the upper end of this supports the opening 2 in the center of the bottom plate 2a of the heating tank 2;
b is inserted from below. Reference numeral 6 denotes a drive shaft pivotally supported at the center of the tub support 5. A connector 6a is provided at the upper end of this drive shaft, and a pulley 7 is fixed to the lower end. 8 is a motor fixed to the support plate 4;
A V-belt 10 is stretched between the motor pulley 9 and the pulley 7, which are fixed to the rotating shaft 8a. Reference numeral 11 denotes a tub, and a tub support plate 12 fixed to the outer bottom surface of the tub is rotatably engaged with a mounting groove 5a of the tub support 5. Reference numeral 13 denotes a bearing member fixed to the center of the bottom of the tub 11, on which a kneading shaft 14 vertically penetrating the bottom of the tub 11 is rotatably supported.
is engaged with the connector 6a. A kneading blade 15 is detachably attached to the upper part of the kneading shaft 14. Reference numeral 16 denotes a lower heater placed at a predetermined distance from the bottom plate 2a of the heating tank 2, and 17 is an upper heater placed at a predetermined distance from the top plate 2c of the heating tank 2. 18 is a fixed thermostat which is a thermal switch, which senses the temperature inside the heating tank 2 and sets it to a constant temperature suitable for the fermentation temperature, for example 40°C.
It opens when the temperature exceeds ℃ and closes when the temperature falls below a certain temperature. In addition, 19 is an operation knob for a timer which will be described later, 20 is an adjustment knob for adjusting the temperature of a variable thermostat 21 that senses the temperature inside the heating tank 2 and maintains it at a set temperature, and 22 is an "open" and "open" knob. 23 is a switch for selecting the process with the words ``AUTO'' written above it, 23 is an operation switch for switching heaters with the words ``SERIES'' and ``PARALLEL'' written above it, and 24 is the word ``Bake'' and ``Fermentation'' written above. This is a selection switch as a manual switch with .

On the other hand, in the electric circuit shown in FIG. 3, 25 is a timer, which includes a timer motor 26, a first open/close type cam switch 27 which is controlled to open and close by the timer motor 26, a second open/close type cam switch 28, and an open/close type cam switch 27. 3rd cam switch 29
It is made up of. In this case, the cam switch 28
The switch is of a switching opening/closing type having fixed contact pieces a, b and a movable contact piece c. Reference numerals 30 and 31 are switch parts of the changeover switch 22, which are interlocked to switch the changeover switch 22 into the "oven" mode.
When selected, the contact pieces c and a of the switch part 30 and the contact pieces c and a of the switch part 31 are closed, and the switch is set to "automatic".
When selected, the contact pieces c and b of the switch portion 30 and the contact pieces c and b of the switch portion 31 are closed. 32 and 33 are the operation switches 2
These are the switch parts of No. 3, and these are interlocked, and when the operation switch 23 is selected to "series", the contact pieces c and a of the switch part 32 and the contact pieces c and a of the switch part 33 are closed. When "parallel" is selected, the contacts c and b of the switch section 32 and the contacts c and b of the switch section 33 are closed. The selection switch 24 is closed when "baking" is selected and opened when "fermentation" is selected. Therefore, the motor 8 as a load,
The lower and upper heaters 16 and 17 and the timer motor 26 are connected to a fixed thermostat 18, a variable thermostat 21, a selection switch 24, cam switches 27 to 29, switch parts 30 and 31 of the changeover switch 22, and switch parts 32 and 33 of the operation switch 23. As shown in FIG. 3, the power plug 34 is connected to the power supply plug 34 via the power supply plug 34 as shown in FIG.

Next, we will discuss the operation of this embodiment with the above configuration in the fourth section.
This will be explained with the time chart shown in the figure. First, after putting raw materials such as flour, water, and seasonings into the tub 11 of the heating tank 2, select the changeover switch 22 to "auto", select the operation switch 23 to "series", and turn the selection switch 24. When "firing" is selected and closed, and the operation knob 19 of the timer 25 is set, the cam switch 27 is closed and a current conduction path for the timer motor 26 is formed through the cam switch 27. An energizing path for the motor 8 is formed between contact pieces c and b, between contact pieces c and a of the cam switch 28, and through the cam switch 27, and as the timer 25 starts timing operation, the kneading blades 15 are rotationally driven. The kneading process is started and the materials in the tub 11 are kneaded for a predetermined period of time. Thereafter, when the above-mentioned kneading process is completed, the contact piece ca of the cam switch 28 is opened and the contact piece c-b is closed, and the timer 25 shifts to the primary fermentation of the next yeast fermentation process. In this primary fermentation, between contact pieces c and b of the switch part 30, between contact pieces c and b of the cam switch 28, and between contact pieces b of the switch part 31.
-c, fixed thermostat 18, switch section 3
2, between the contact pieces c and a of the switch part 33, and between the contact pieces a and c of the switch part 33
upper heater 17 via the gap and cam switch 27
An energizing path is formed to a series circuit between the lower heater 16 and the lower heater 16, and the fixed thermostat 18 controls the temperature inside the heating tank 2 to the yeast fermentation temperature. and,
When this primary fermentation is completed, the contact pieces c and b of the cam switch 28 are opened and the contact pieces c and a are closed, and the kneading blades 15 are rotated again to degas the material after yeast fermentation. Then, move on to the next secondary fermentation. In this secondary fermentation, the temperature in the heating tank 2 is controlled to the yeast fermentation temperature as in the primary fermentation, and the yeast fermentation process consisting of primary fermentation, degassing, and secondary fermentation is completed. When the kneading and yeast fermentation processes are thus completed, the baking process begins, and the cam switch 29 closes to short-circuit the fixed thermostat 18. Based on this, between the contact pieces c and b of the switch part 30, between the contact pieces c and b of the cam switch 28, between the cam switch 29, the selection switch 24, and the contact pieces c and a of the switch part 32,
The series circuit of the upper heater 17 and the lower heater 16 is directly energized between the contact pieces a and c of the switch part 33 and through the cam switch 27, and the control of the heaters 16 and 17 by the fixed thermostat 18 is disabled, and the heating The tank 2 is heated to a high temperature and the semi-finished bread in the tub 11 is baked, and the bread is baked.
The bread baked in this way is placed in bucket 11.
Take it out of the heating tank 2, turn it upside down and gently place it in the tub 1.
You can take it out of the tub 11 by tapping 1.

On the other hand, if you want to modify the bread ingredients after yeast fermentation, or if you do not want to eat the bread immediately,
After putting the raw materials into the tub 11, select and release the selection switch 24 to "fermentation" and set the operation knob 19 of the timer 25, each process of kneading and yeast fermentation is controlled by the timer 25 in the same manner as described above. Ru. Then, when the firing process begins, the selection switch 24 is opened, so that the series circuit of the upper heater 17 and the lower heater 16 is not directly energized by the selection switch 24, but a current-carrying path is formed through the fixed thermostat 18. is,
Therefore, the control of the heaters 16 and 17 by the fixed thermostat 18 is enabled, and the inside of the heating tank 2 is continuously controlled to the yeast fermentation temperature. As a result, the baking process is apparently converted into a yeast fermentation process and the secondary fermentation continues, after which the timer 25 stops measuring and the cam switch 27 is opened.
As a result, the heaters 16 and 17 are cut off, and the baking process, which is controlled to the yeast fermentation temperature, is completed.

In addition, when the selector switch 22 is operated to select "oven" and the timer 25 is set to a predetermined time,
The contact pieces c and a of the switch part 30 are closed, and the contact pieces c and a of the switch part 31 are closed, so that the contact pieces c and a of the switch part 30 are closed.
The heater 16 and the 17
The series circuit is energized, heating the heating tank 2 to the set temperature of the variable thermostat 21 and heating the food for a predetermined period of time. Here, select switch 24
If "fermentation" is selected and opened, the variable thermostat 21 is disabled and the fixed thermostat 18 is enabled instead, and the heating tank 2 is maintained at a constant temperature, for example, 40°C.

Furthermore, if the operating switch 23 is operated to select "parallel", the heaters 16 and 17 are energized separately and generate heat at a higher temperature than when the heaters 16 and 17 are connected in series. It becomes possible to brown the food during cooking.

As explained above, the present invention is equipped with a selection switch that activates the thermal switch when selected during the baking process by the timer and controls the yeast fermentation temperature in the heating tank. The heating tank can be continuously controlled at the yeast fermentation temperature during the baking process with a simple circuit that only requires a cam switch and relay to forcibly stop the timer at the end of the yeast fermentation process. A semi-finished bread material can be obtained after the yeast fermentation process has been completed, and a simple circuit configuration can be used to provide an oven that is inexpensive and does not impair convenience.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a vertical front view, FIG. 3 is an electric circuit diagram, and FIG. 4 is a time chart for explaining the operation. In the drawing, 2 is a heating tank, 8 is a motor, 11 is a bucket,
15 is a kneading blade, 16 and 17 are heaters, 18 is a fixed thermostat (thermal switch), 22 is a changeover switch, 24 is a selection switch (manual switch), and 25 is a timer.

Claims (1)

[Scope of utility model registration request] A bucket having kneading blades in a heating tank and a heater for heating the heating tank, including a thermal switch that controls the heater to control the temperature in the heating tank to yeast fermentation temperature, and an open/close type switch. It is equipped with a first cam switch, a second cam switch of changeover type, and a third cam switch of open/close type, and when set, the first cam switch closes and starts operation, thereby operating the motor that rotationally drives the kneading blades. Then, the second cam switch is switched to stop the motor, and the heater is energized via the thermal switch to perform the yeast fermentation process, and then the third cam switch is turned on to stop the motor.
a timer that closes the third cam switch to short-circuit the thermal switch, disables the heater control by the thermal switch, and continues energizing the heater to perform the firing process; An oven comprising: a manual switch that releases the short circuit of the thermal switch, enables heater control by the thermal switch, and continues to control the yeast fermentation temperature in the heating tank.