JP3096319U - Tofu making machine - Google Patents

Abstract

(57) [Summary] (Modifications) [Problem] To provide a tofu manufacturing apparatus which has a small-sized and simple overall configuration, and is capable of optimizing temperature control in a production process from the completion of soymilk to tofu. I do. SOLUTION: A processing current is applied to a counter electrode provided in a tofu manufacturing container containing soy milk through a triac provided in a processing current supply path while appropriately controlling a current value, and soy milk is generated by Joule heat. Warm.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a tofu maker, especially for use in the home, for example It is a model that makes it possible to produce tofu simply and simply.

[0002]

[Prior art]

  Generally, tofu is produced by mixing soymilk with bittern to heat it. An external heat source such as an electric heater, a microwave oven, or a gas stove is used as the heating means. Has adopted a method of heating soy milk.

[0003]

[Problems to be solved by the device]

  However, when using these external heat sources, the container containing soymilk should be placed from the outside. Since it will be heated, it is inevitable that the overall configuration will be large, Considering using it as one of household items, for example, A simple structure is desirable.

[0004]   The present invention was made in consideration of the above points, and the overall configuration is small and It is simple, and the temperature control is optimized during the production process from soy milk to tofu. It aims to propose a tofu maker capable of being optimized.

[0005]

[Means for Solving the Problems]

  In order to solve such a problem, in the present invention, a tofu production container 3 containing soymilk 2 is provided. A machining current flows through the machining current feed path 16 between the counter electrode plates 4A and 4B provided inside. The soybean milk 2 is heated by the Joule heat generated in the soybean milk 2 to produce tofu. It is the tofu maker 1 that does the current value of the processing current flowing through the processing current feed line 16 The processing current value detecting means for outputting and the processing current power supply path 16 are provided and are made of alternating current. The triac 25 for controlling the current value of the machining current and the machining current value detection means 17 are added. Firing angle for controlling the firing angle of the triac 25 based on the work current value detection output S3 And control means (40, 26).

[0006]   A processing electrode for supplying an AC processing current between the counter electrodes 4A and 4B provided in the tofu manufacturing container 3. The triac 25 is provided in the current feeding path 16, and the firing phase angle of the triac 25 is set. The AC processing current flowing in the soybean milk between the counter electrodes 4A and 4B can be controlled by controlling it. By doing so, the soy milk between the counter electrodes 4A and 4B can be heated reliably and safely. It is possible to easily realize the tofu maker 1 that can be used.

[0007]

[Embodiment of device]

  An embodiment of the present invention will be described in detail below with reference to the drawings.

[0008]   In FIG. 1, reference numeral 1 indicates a tofu maker as a whole, and soy milk 2 mixed with bittern is put therein. Place the soy milk 2 in the tofu manufacturing container 3 (made of heat-resistant plastic). Thus, a pair of counter electrode plates 4A and 4B are provided, and counter electrode plates 4A and 4B are provided. As shown in FIG. 4 (A) from the processing control unit 6 via the connection cords 5A and 5B. A machining current S1 having a different AC power supply waveform H1 is supplied.

[0009]   As shown in FIG. 2, the processing control unit 6 is a controller connected to a commercial AC power source. From the power source 11 to the power cord 12, the plug 13, the power switch 14 and the power AC power is supplied to the power supply line 16 forming the machining current feeding path through the power source input terminal 15. And the processing for generating the tofu from the soymilk 2 while receiving the supply of As the current, the machining current value detection circuit 17, the machining switch circuit 18, the machining current control circuit Power is supplied to the connecting cords 5A and 5B through the path 19 and the machining current output terminal 20 in sequence. It

[0010]   Thus, the soy milk 2 put between the counter electrode plates 4A and 4B of the tofu manufacturing container 3 The alternating current supplied from the commercial power source flows as the processing current, and as a result, the soybean milk 2 is directly fed. The soy milk 2 is warmed by the Joule heat.

[0011]   The machining current control circuit 19 has a detailed configuration of the machining current control system as shown in FIG. , Having a triac 25 inserted in the power supply line 16 as a current value control element, A firing pulse signal S generated in the firing phase changing circuit 26 for the gate. 2 (FIG. 4 (E)), its fall at times t11 and t21. Triggers the triac 25, and as a result, the AC power supply waveform H1 (see FIG. )) Extinguishes across the zero-cross point at times t2 and t3 (t1). During this period, the triac 25 is turned on (FIG. 4 (F)).

[0012]   In the case of this embodiment, the ignition pulse signal S2 of the ignition phase changing circuit 26 is It is given to the gate of Triac 25 through Totriac 31 Power supply line 16 and DC control line 32 (+5 [V]) that form the machining current supply path The triac 25 can be exchanged with a simple structure while disconnecting the electrical connection with The power supply waveform (Fig. 4 (A)) can now be ignited in the positive and negative phase angle sections. Has been.

[0013]   Further, the machining current value detection circuit 17 is connected to the power supply line 16 as the current value detection element 36. It has an inserted resistor with a relatively large power capacity, and the voltage across it has a current detection output. As S3, the ignition phase control circuit 40 is connected via the amplifier circuit 37 and the photocoupler 38. Is output to.

[0014]   In the case of this embodiment, the photocoupler 38 outputs positive and negative output from the amplifier circuit 37. When the negative phase interval is reached, the reverse parallel connections are made so that both will emit light. A pair of light emitting diodes 38A and 38B, and a light receiving element 38C The current value detection output S3 output from the AC power supply waveform is as shown in FIG. A voltage waveform that repeatedly produces a conduction waveform every half cycle of H1 (FIG. 4A) One.

[0015]   This current value detection output S3 is given to the input resistor 40A of the ignition phase control circuit 40. 4 (B) based on the voltage between the voltage dividing resistors 40B and 40C. ), The input voltage of the same waveform as the current value detection output S3 is formed, and this input voltage is integrated. Are averaged by the resistor 40D for integration and the capacitors 40E and 40F for integration.

[0016]   Thus, the ignition phase of the value obtained by averaging the waveform of the current value detection output S3 in FIG. The control output S4 is given from the firing phase control circuit 40 to the firing phase changing circuit 26.

[0017]   In the case of this embodiment, the input resistor 40A is a semi-fixed resistor, and its resistance value is By adjusting the voltage across both ends, therefore the input voltage given to the integrating resistor 40D Adjustable, which sets the reference value for the machining current flowing through the triac 25 Functioning as an element (referred to as a reference current value setting element).

[0018]   The ignition phase changing circuit 26 has a mono multivibrator 26A, The vibrator 26A is sent from the zero-cross pulse generation circuit 50 (FIG. 2). The inversion operation is performed by the zero-cross pulse signal S5, and the inversion operation time is It is controlled by the firing phase control signal S4.

[0019]   The zero-cross pulse generation circuit 50 receives the AC power supply waveform H1 from the power supply line 16 (see FIG. 4 (A)), the AC power supply waveform H is received as shown in FIG. 4 (C). 1 before and after the timing of crossing the zero point at time t1 (t3) and time t2. Zero-cross pulse signal falling from logic "1" to logic "0" for a narrow time span. No. S5 is generated, and the ignition phase changes due to the rise from the logic "0" to the logic "1". Trigger the mono-multivibrator 26A of the updating circuit 26.

[0020]   Thus, as shown in FIG. 4D, the mono multivibrator 26A has zero The cross pulse signal S5 (FIG. 4 (C)) rises from logic "0" to logic "1". Mono multi-vibe that rises from logic "0" to logic "1" at the timing Generates the generator output S6 and then depends on the firing phase control signal S4. When the reversing operation time ends at the times t11 and t21, the mono-multivibration Output S6 from logic "1" to logic "0".

[0021]   The ignition phase changing circuit 26 uses the zero-cross pulse signal S5 (FIG. 4 (C)) and the monomer. The multivibrator output S6 (FIG. 4 (D)) is serialized and shown in FIG. 4 (E). A firing pulse signal S2 which is as follows is obtained, and this firing pulse signal S2 is processed as described above. By applying to the light emitting element of the phototriac 31 of the current control circuit 19, the switching is performed. At the time point t11 of the positive half-cycle section and the time point t21 of the negative half-cycle section of the flowing current waveform H1. The triac 25 from the off state to the on state by the fall of the firing pulse signal S2. The state is ignited (Fig. 4 (F)).

[0022]   On the outer wall of the soymilk manufacturing container 3, there is a voltage value corresponding to the temperature of the tofu manufacturing container 3. A temperature sensor 55 for generating a temperature detection signal S11 is provided (FIGS. 1 and 2), The temperature detection signal S11 is given to the finish temperature detection circuit 56.

[0023]   The finish temperature detection circuit 56 finishes the temperature detection signal S11 with a semi-fixed resistor. Compared with the voltage across the temperature setting element 57, when the voltage across the voltage is exceeded, the finish temperature The detection signal S12 is input to the microcomputer 58A of the processing operation circuit 58.

[0024]   The microcomputer 58A operates so as to control the machining control unit 6 as a whole. When the machining start button 59A on the operation panel 59 is operated, the machining operation is performed. By operating the processing switch relay 58B provided in the working circuit 58, Processing switch using the normally open contact 18A as the processing start / stop command signal S13 By turning on the circuit 18, the alternating current supplied to the power line 16 A current is applied between the counter electrode plates 4A and 4B of the tofu manufacturing container 3. With this When the processing end button 59B provided on the operation panel 59 is operated, or When the finish temperature detection circuit 56 generates the finish temperature detection signal S12, the microphone The computer 58A can control the processing switch relay 58B in a non-operating state. Causes the contact 18A of the processing switch circuit 18 to turn off, which causes tofu The machining current flowing between the counter electrode plates 4A and 4B of the manufacturing container 3 is cut off.

[0025]   In the case of this embodiment, the machining control unit 6 includes a DC power supply connected to the power supply line 16. The power source generation circuit 60 is provided, and the machining control unit 6 is connected to the DC power source generation circuit 60. DC +12 [V] and +5 [V] are generated as the power supply voltage for each part of It's been roaring.

[0026]   With the above-mentioned configuration, the operation is performed in a state where the soybean milk 2 is put in the tofu manufacturing container 3. When the operator operates the machining start button 59A on the operation panel 59, the machining operation circuit 58 The microcomputer 58A turns on the processing switch relay 58B. By this, the contact 18A of the processing switch circuit 18 is closed.

[0027]   At this time, the alternating current supplied from the outlet 11 to the power line 16 is Tofu is passed through the flow value detection circuit 17, the processing switch circuit 18, and the processing current control circuit 19. It flows into the soybean milk 2 between the opposing electrode plates 4A and 4B of the production container 3 and is heated by the Joule heat. Soy milk 2 is warmed.

[0028]   In this state, the alternating current flowing through the soymilk 2 is the current of the processing current value detection circuit 17. The detection output S3 is detected by the flow value detection element 36, and the detection output S3 is output to the amplifier circuit 37 and the It is given to the ignition phase control circuit 40 via the coupler 38 and integrated. As a firing phase control signal S4 representing a more average value, The inversion operation time of the vibrator 26A is determined.

[0029]   Thus, the mono multivibrator 26A has the AC power supply waveform H1 (FIG. 4A). Of the zero cross pulse generation circuit 50 in the positive and negative half cycles of After being triggered by the pulse signal S5 (FIG. 4 (C)), after the reversal time has elapsed 4 (D), the firing phase changing circuit 26 causes the firing pulse to change. Signal S2 (FIG. 4 (E)) is generated, and this firing pulse signal S2 is used to control the machining current. Triac 2 as current control element via phototriac 31 in path 19 The triac 25 is supplied to the gate of the AC power supply waveform H1 (see FIG. 4). At time t11 and t21 in (A)), the commutation operation is performed, whereby the tofu manufacturing container 3 The soybean milk 2 is provided with a reference current value setting element of the integrating resistor 40D of the ignition phase control circuit 40. A machining current having a reference current value corresponding to the resistance value of the input resistance 40A formed flows.

[0030]   Thus, the soy milk 2 is gradually heated by being heated by the Joule heat generated by the processing current. Tofu is gradually produced, but in the process of production, tofu between the counter electrode plates 4A and 4B The resistance value of soymilk 2 gradually changes, and as a result, the processing current changes according to the change in resistance value. Change.

[0031]   When the machining current changes in this way, this change is inserted in the power line 16. The change in the voltage across the current value detecting element 36 of the machining current value detecting circuit 17 Appears, which changes the current detection output S3 of the machining current value detection circuit 17.

[0032]   Here, when the machining current becomes large, the ignition phase control circuit 40 is If the firing phase angle of C25 is increased and conversely the machining current becomes smaller, the firing phase angle The firing phase control signal S4 for reducing the firing phase control signal S4 It is given to the evlator 26A.

[0033]   Incidentally, as shown by the arrows in FIGS. 4D, 4E and 4F, the machining current is Inversion of the mono-multivibrator 26A of the ignition phase changing circuit 26 when it becomes large By increasing the operation time (FIG. 4 (D)), the trailing edge of the firing pulse signal S2 falls. Increase the phase (ie, slow it) (Fig. 4 (E)), and set the firing phase angle of TRIAC 25. It is made large (that is, slow) (FIG. 4 (F)), and thereby the machining current value is made small. this On the other hand, when the machining current becomes small, the monophase vibration of the firing phase changing circuit 26 By reducing the reversing operation time of the oscillator 26A (FIG. 4 (D)), the ignition pulse The falling phase of the scan signal S2 is made smaller (that is, earlier) (Fig. 4 (E)), and the triac The firing phase angle of No. 25 is made smaller (that is, faster) (Fig. 4 (F)), so that the machining current value To increase.

[0034]   Thus, the processing current flowing in the soybean milk 2 between the opposing electrode plates 4A and 4B changes. Control the ignition phase angle of the TRIAC 25 to restore it to As a result, the processing control unit 6 constantly controls the soybean milk 2 based on the reference value set by the input resistor 40A. Continue heating soymilk 2 while applying a constant current.

[0035]   As the tofu nears completion, the resistance value between the counter electrode plates 4A and 4B rapidly decreases. Although it has the property of decreasing, the current continues to flow almost constantly due to the function of the above circuit, The temperature of the tofu manufacturing container 3 continues to rise due to the heat generated by the hurle heat.

[0036]   This rise in temperature is detected by the temperature sensor 55, and the temperature detection signal S11 is detected. When the voltage exceeds the set voltage of the finish temperature setting element 57, the finish temperature detection signal S 12 is applied to the microcomputer 58A of the processing operation circuit 58, , The processing switch relay 58B is controlled to the non-operating state, and as a result, the processing switch When the contact 18A of the circuit 18 is turned off, the counter electrode plates 4A and 4B are connected to each other. Cut off the flowing machining current.

[0037]   Thus, one tofu manufacturing operation is completed.

[0038]   If you want to interrupt the tofu production in the one tofu production process, The operator only has to operate the machining end button 59B on the operation panel 59. The microcomputer 58A of the operation circuit 58 disables the processing switch relay 58B. By setting the operating state, the contact 18A of the processing switch circuit 18 is turned off. The soybean milk 2 processing current is cut off.

[0039]   According to the above configuration, the soybean milk 2 between the counter electrode plates 4A and 4B of the soybean milk manufacturing container 3 can be used. The current value of the flowing machining current is controlled to be a safe and arbitrary set value. Thus, in the process of producing tofu from the soymilk 2, the counter electrode plates 4A and 4B are formed. Even if the resistance value between the two changes, the state of soymilk 2 should not be in an unstable heat generation operating state. Can be suppressed to, for example, soy milk 2 boils, so Tofu production process from soymilk 2 to the state where it becomes impossible to produce tofu The optimum control can be performed reliably and safely.

[0040]   In the process for producing soybean milk 2 from such soybean milk 2 between the counter electrode plates 4A and 4B As the value of the machining current flowing through, set the value of the input resistance 40A of the ignition phase control circuit 40. It can be changed by correcting it. When increasing the reference machining current, decrease the resistance value of the input resistor 40A. By setting the input voltage to a small value and setting the input voltage low, The reversal time (hence the firing phase angle of the triac 25) can be reduced and vice versa. If you want to reduce the standard machining current value, increase the resistance value of the input resistor 40A. As a result, the inversion time of the mono-multivibrator 26A (hence the triac 25 It is sufficient to set the firing phase angle of) larger.

[0041]   In the above embodiment, the reference current in the ignition phase control circuit 40 is changed. The case where the semi-fixed resistor is used as the input resistor 40A as the value setting element has been described. Instead of this, I want to change the reference current value by using a fixed resistor as the input resistor 40A. In this case, the input resistor 40A may be replaced with a fixed resistor having another resistance value. The same effect as the above case can be obtained.

[0042]   Moreover, in the above-described embodiment, the soybean milk 2 between the counter electrode plates 4A and 4B is flushed. In order to constantly control the machining current value to be set to the predetermined reference machining current value, Current value detection circuit 17, firing phase control circuit 40, firing position using typical circuit elements Although the phase change circuit 26 is used, instead of this, these control operations are performed by the microphone. It may be realized by software means using a computer.

[0043]   Further, in the above-described embodiment, the circuit system of the DC control voltage and the AC power supply control As a means for connecting with the system, a phototriac 31 and a photocoupler 38 are provided. However, instead of this, other conversion means (for example, a transformer is used for coupling). The same effect as above can be obtained even if they are combined by It Also, if the DC power supply circuit uses a method that uses an isolation transformer, the circuit reference point ( It is also possible to directly control the circuit with the same source point).

[0044]

[Effect of device]

  As described above, according to the present invention, AC machining is performed between opposing electrodes provided in a tofu manufacturing container. A triac is provided in the machining current feed line that allows current to flow, and the firing phase of the triac By controlling the angle, it is possible to control the alternating processing current that flows in the soymilk between the opposing electrodes. By doing so, the soy milk between the counter electrodes can be heated securely and safely. A simple tofu maker can be easily realized.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the overall configuration of a tofu maker.

FIG. 2 is a block diagram showing a detailed configuration of a processing control unit in FIG.

FIG. 3 is a connection diagram showing a detailed configuration of a machining current control system of FIG.

FIG. 4A is a machining current S having an AC power waveform H1.
It is a signal waveform diagram showing 1. (B) is the current detection output S
3 is a signal waveform diagram showing No. 3 of FIG. (C) is a signal waveform diagram showing the zero-cross pulse signal S5. (D) is a signal waveform diagram showing the output of the mono multivibrator 26A. (E) is a signal waveform diagram showing the firing pulse signal S2. (F) is a signal waveform diagram showing an on / off operation of the triac 25.

[Explanation of symbols]

1 ... Tofu maker, 2 ... Soy milk, 3 ... Tofu production container,
4A, 4B ... Counter electrode plates, 5A, 5B ... Connection cord, 6 ... Processing control section, 15 ... Power input terminal, 16 ...
… Power line (machining current feeding path), 17 ... Machining current value detection circuit, 18 ... Machining switch circuit, 18A ... Contact, 19 ... Machining current control circuit, 20 ... Machining current output terminal, 25 ... TRIAC, 26 ... Ignition phase changing circuit, 26A ... Mono multivibrator, 31 ... Phototriac, 32 ... DC control line, 36 ... Current value detecting element, 37 ... Amplifying circuit, 38 ... Photocoupler , 40 ... Ignition phase control circuit, 40A ... Input resistance (reference current value setting element), 40B, 40C ... Voltage dividing resistance, 40D ... Integrating resistance, 40E, 40F ... Integrating capacitor, 50 ... … Zero cross pulse generator, 55
...... Temperature sensor, 56 ...... Finish temperature detection circuit, 57 ...
… Finishing temperature setting element, 58… Machining operation circuit, 58A
...... Microcomputer, 58B ... Relay for processing switch, 59 ... Operation panel, 59A ... Processing start button, 59B ... Processing end button, 60 ... DC power supply generation circuit.

Claims (2)

[Scope of utility model registration request] 1. A tofu is produced by warming the soymilk by Joule heat generated in the soymilk by passing a processing current through a processing current feeding path between opposing electrode plates provided in a tofu manufacturing container containing soymilk. A tofu maker, comprising a triac provided in the machining current power supply path for controlling the current value of the machining current composed of an alternating current, and firing angle control means for controlling the firing angle of the triac. A tofu maker characterized in that 2. The tofu maker, based on processing current value detection means for detecting a current value of the processing current flowing through the processing current feeding path, and processing current value detection output of the processing current value detection means. The tofu maker according to claim 1, further comprising a current value feedback means capable of setting a current value of the processing current to an arbitrary value.