JPS59218122A - Automatic roasting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an automatic roasting device that can always roast raw material that has been roasted twice or more repeatedly to the same brown color set by the user. be.

Configuration of conventional examples and their problems In many conventional roasting methods, the roasting time for the first and second roasting is the same, and in the second roasting time when the temperature of the vessel is rising, for example, When baking, it is unavoidable that the texture will be darker than the first time.

Therefore, in conventional automatic toasters, charging and discharging of the OR is used to compensate for the rise in temperature of the toaster.

In other words, Figure 1 shows the circuit diagram of this method.
1 is an AC power source, and 2 is a contact connected to the AC power source 1. When the contact 7 is turned on, a voltage is applied to the heater 3 and energization 755 to the heater 3 is started. At the same time, resistance 4. The smoothing capacitor 6 is charged to a constant voltage via the diode 6. Then, the constant voltage is divided by a resistor 7.8 to obtain a reference voltage Vr. On the other hand, the capacitor 9 has a variable resistor 10. Charging is started through the evening cycle '11, and the voltage Vc of the capacitor 9 increases. The voltage Vc of this capacitor 9 is the reference voltage V
When it becomes almost equal to f, the PUT 12 performs a switching operation and turns on, and as a result, the charge in the capacitor 9 is transferred to the resistor 13.
The discharge current causes the thyristor 14 to conduct. When the thyristor 14 becomes conductive, the coil 16 is excited, and the contact 2, which was mechanically latched to the closed contact, is opened, and the current supply to the heater 3 is stopped. As is clear from such an operation, the time during which the voltage Vc of the capacitor 9 rises to the reference voltage Vr is the time during which the heater 3 is energized. If the contact 2 is turned on again for a certain period of time after the power supply to the heater 3 is stopped, that is, while the charge in the capacitor 9 remains, the capacitor 9 will be recharged. The time required for the voltage Yc to rise by 1 to the reference voltage is shortened by the amount of charge remaining in the capacitor e, which shortens the roasting time, making it possible to correct the roasting condition. It is something.

If we consider the case of short-time energization, the temperature rise characteristic of the toaster body is similar to the rise characteristic of the voltage Vc of the capacitor 9, so the temperature of the toaster body almost rises due to its own heat capacity. However, the voltage Vc of the capacitor 9 will rise to a certain extent, and as a result, when the second roasting is performed subsequently, there is a problem that the correction will be too much and the bread baking will become unwell. .

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and aims to provide an automatic roasting device that can always achieve a constant degree of toasting when baking bread several times. It is something.

Structure of the Invention In order to achieve the above object, the present invention provides a setting means for setting a timer time, and a setting state determining means for dividing and determining the setting state of the timer time into several stages based on the output of the setting means. , energizing the load.

A load state detection means for detecting a non-energized energized state, and the output of this yellow state detection means stores the number of energization times per energization time and the non-energization time to the load up to the previous time, and the energization time is less than or equal to a predetermined time. In this case, an energization storage means does not store energization information, and a correction value for the current energization time to the load is calculated based on the output of the energization storage means, and this correction value is calculated from the setting time determined by the setting state determination means. The device is equipped with an energizing time determining means for determining the current energizing time by reducing the current energizing time, and a load energizing means for energizing the load for the time determined by the energizing time determining means. The roasting status from the roasting setting time to the previous roasting status (
Since the correction value calculated by calculating the number of energization times per energization time and non-energization time to the load is reduced, it is possible to always obtain a constant degree of firing, and the energization storage means also stores the energization time. Since the configuration is such that the energization information is not memorized if the energization is carried out for a predetermined period of time, for example 30 seconds or less during repeated roasting, even though the temperature of the container that makes up the automatic roasting device has not risen. First, it is possible to solve the problem that, for example, baking bread becomes uncomfortable due to too much correction due to repeated roasting.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2 shows a block diagram of an automatic roasting apparatus according to an embodiment of the present invention, in which 21 is a setting means for setting the timer time, and 22 is a setting state of the timer time based on the output of the setting means 21. 23 is a load state detection means for detecting the energization state to the load 24, that is, whether the load 24 is energized or not; 26 is the aforementioned An energization storage means 26 stores the energization time 9 energization times and non-energization time to the load 24 up to the previous time based on the output of the load state detection means 23, and does not store energization information when the energization time is less than a predetermined time. A correction value for the current energization time to the load 24 is calculated based on the output of the energization storage means 26, and this correction value is subtracted from the set time determined by the setting state determination means 22 to determine the current energization time. The energizing time determining means 27 is a load energizing means that energizes the load 24 for the time determined by the energizing time determining means 26.

FIG. 3 shows the specific circuit configuration of the automatic roasting device, where 31 is an AC power source, 32 is a contact connected to the AC power source 31, and when this contact 32 is closed, the heater 33 is energized. will be started. This energization starts at the resistors 34 and 36.
, 36, and a diode 37 degree transistor 38 circuit. That is, when contact 32 is open, transistor 38 is in an off state, and the collector voltage of transistor 38 is approximately equal to +Van. On the other hand, when the contact 32 is closed, a voltage divided by the resistors 34 and 36 is applied to the transistor 38 in the positive half wave according to the frequency of the AC power supply, and the transistor 38 is turned on. in this case,
The collector voltage of transistor 3B becomes approximately equal to GND. ′-! In the negative half wave, resistor 34 and diode 37
Current flows through the transistor 38, turning off the transistor 38. By opening and closing the contact 32 in this manner, a square wave having the same frequency as the frequency of the AC power source is outputted to the collector of the transistor 38, which is then manually inputted to the microcomputer 39. Similarly, the microcomputer 39 has a resistance of 40°41.42. Diode 43. Transistor 4 in the transistor 440 circuit
The collector voltage of No. 4 is manually controlled to monitor the power supply frequency, and this period is used as the reference time for its own timer.

Setting of the timer for one hour is done by a variable resistor 46,
Then, the timer/D converter 46 determines which timer is one hour and inputs it to the microcomputer 39. (Set time Ts) Then, the correction time Tg is subtracted by the microcomputer 39, and when one hour has passed after the start of energization (Ts-T), the microcomputer 39 outputs an output, and the transistor 47, which is normally on,
to the state of cuff. As a result, resistance 48, 491/
il: The gate of the thyristor 60 is triggered, and the thyristor 50 becomes conductive. The conduction of the thyristor 6o excites the coil 61, opens the contact 32 which was mechanically latched to a closed contact, and stops energizing the heater 33.

Next, the operation when the automatic roasting apparatus according to an embodiment of the present invention is applied to a toaster will be explained using the flowchart shown in FIG.

When the user puts bread into the stove and presses the switch to close the contact 32, the process passes through step 101, and in step 102, the on-time timer starts, and at step 10 IC, the user manually inputs the time set by the setting means 1. . If the load energization switch remains on, that is, if automatic roasting is being performed, step 10
In step 5, the energization is continued until the on-timer elapsed time reaches the set time, and when the set time is reached, the energization of the load is ended in step 106, and the on-time timer is stopped in step 107. Then, in step 108, the energization time is 30
It is determined whether the time is less than 30 seconds, but in normal automatic roasting, the set time is set at least 30 seconds or less, so
In step 109, the current energization time information is stored, and the process returns to step 101 to wait for the next switch to be pressed and turned on. This stored time information is naturally involved in setting the next energization time when roasting is repeated. When toasting bread with this toaster, the switch may be manually turned off midway through, but at this time, if it is determined in step 104 that the switch is off within 30 seconds after passing through step 102, the above-mentioned Energization memory means 2
5 is configured so that time information regarding this energization is not stored, so naturally it is not involved in setting the next energization time.

According to the above embodiment, when repeatedly toasting bread in the toaster, the user can set the desired browning color using the setting means 1, and then the energization time can be set to gradually shorten each time from the second time onwards. The user can obtain bread of the same brown color as desired without having to take the trouble of re-baking the bread. In addition, during repeated roasting, the time information related to energization is not stored or ignored when energization is applied for 30 seconds or less, so even though the temperature of the vessel has not risen, the repeated roasting It is possible to solve the problem of automatic roasting apparatuses, in which, for example, baking bread becomes inconvenient due to too much correction due to baking.

Effects of the Invention As described above, according to the present invention, when roasting is repeated two or more times, the roasting state from the current roasting setting time to the previous roasting state (load energization time 9 energization number and Since the correction value calculated by calculating the de-energized time (non-energized time) is reduced, a constant firing condition can always be obtained with high precision.Furthermore, the output of the load state detection means allows the load to be energized for the previous time 1 energized. The energization storage means that stores the number of times and non-energization time is configured not to store energization information when the energization time is a predetermined time, for example, 30 seconds or less during repeated roasting. This also solves the problem that, even though the temperature of the baking equipment does not rise, excessive compensation is applied due to repeated roasting, making baking bread uncomfortable, for example. be.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing a conventional example, FIG. 2 is a block diagram of an automatic roasting device showing an embodiment of the present invention, FIG. 3 is a specific electric circuit diagram of the same roasting device, and FIG. The figure is a flowchart showing the operation of the roasting apparatus. 21... Setting means, 22... Setting state determining means, 23... Load state detecting means, 24.
... Load, 26 ... Energization storage means, 26
. . . Energization time determining means, 27 . . . Load energization means.

Claims (1)

[Claims] Setting means for setting a timer time, setting state determining means for dividing the setting state of the timer time into several stages based on the output of the setting means, and determining whether the load is energized or not. A load state detection means for detecting the energization state of energization, and the output of this load state detection means stores the previous energization time 2 times and non-energization time to the load, and when the energization time is less than a predetermined time. is an energization storage means that does not store energization information, and calculates a correction value for the current energization time to the load based on the output of this energization storage means, and calculates this correction value from the setting time determined by the setting state determination means. An automatic roasting device comprising an energizing time determining means for determining the current energizing time by reducing the current energizing time, and a load energizing means for energizing the load for the time determined by the energizing time determining means.