JPH03158112A - Automatic soybeans steaming/boiling device for fermented soybeans - Google Patents

Abstract

PURPOSE:To stabilize steaming/boiling conditions, and also to save labor by automatically controlling the opening/closing operation and the opening of respective motor valves via a computer in response to the pressure and temperature signals from a first temperature sensor and a second temperature sensor. CONSTITUTION:Motor valves MV1 to MV5 are provided to pipings L1 to L5 respectively, and they are operated by the motor ON/OFF operation due to the commands from a computer. To each motor valve, a potentiometer is fitted, thereby the opening of the valve is controlled. Further, a pressure sensor is fitted on a steam cooker, and instantaneously changing pressures are taken out as analogue signals for controlling the opening/closing operation of steam- inlet-side automatic valves of the motor valves MV1 and MV4, and that of steam-discharge-side automatic valves of the motor valves MV2, MV3, and MV5. Thus, steaming/boiling conditions can be stabilized, and also can be saved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a steaming apparatus that completely automates the steaming of soybeans for natto by computer control.

[Prior Art] Until now, the steaming of soybeans for natto has relied heavily on manual labor while watching a meter-type pressure gauge.

Figure 3 shows an outline of a conventional manual steamer for soybeans for natto.

In the figure, B is the steamer main body, a steam inlet pipe 1 connected to the upper part of the steamer main body B, a steam exhaust pipe L2 connected to the steam inlet pipe 1 to discharge steam, and a steam exhaust pipe L2 connected to the steam inlet pipe 1 to discharge steam. It has an outlet pipe 3 for discharging steam and broth from the bottom. ■1, V2. V3 is a manual valve provided in piping 1, piping L2, and piping L3, respectively. S
■ is a safety valve installed in the piping 1. P is piping 1
The pressure inside the steamer body B is measured and displayed using a pressure gauge installed in the steamer. The worker opens and closes each manual valve completely by hand while watching the pressure gauge P as follows. ■First, open valve ■2, then open valve v1 to discharge the drain in the piping. When the drain has finished draining, close ■1 and ■2.

■Open valve ■3, adjust valve ■1 while watching the pressure gauge P, and introduce steam into the steamer. The water adhering to the soybeans is discharged from the outlet of pipe 3, and after a few minutes, steam begins to come out. ■ Close valve ■ 3, introduce steam into the steamer body B, and increase the pressure. ■ Over a certain period of time, increase the pressure further, but at this time, open valve ■ 3 slightly to release the broth and steam. Increase the pressure while discharging from the outlet of piping 3. The amount the valve opens at this time (opening degree)
is done based on the intuition of the worker. (2) While adjusting valve v3 to maintain the balance between steam and broth coming out of the outlet of pipe 3, control valve v1 to maintain a constant pressure for a specified period of time. ■Close the valve ■1 and adjust the valve V3 while checking the balance of steam and broth at the outlet of #3, and gradually lower the pressure by opening the valve ■2. ■In the final step, fully open valve ■2 to completely release the steam. In the conventional steaming method shown in 2, in which all of these operations were performed by the intuition of the worker, the steaming conditions differ depending on the worker, and it is natural that the same worker's steaming condition may differ from day to day. It was about. In addition, the opening and closing of the valves was all done manually, which required a lot of effort.

[Problem to be solved by the invention]

The present invention was invented in view of the problems of the prior art as described above, and is an automatic soybean preparation for natto, which performs all steaming operations under computer control to stabilize the steaming state and save labor. The purpose of this invention is to provide a steaming device.

(Means for Solving the Problems) In order to achieve the above object, the automatic soybean steaming device for natto of the present invention includes a steamer body and a steam injector for introducing steam from a boiler into the steamer body. a first motor valve provided on the steam supply pipe, an outlet pipe for removing steam, drain, and broth from the steam boiler body, and a second motor provided on the outlet pipe. A valve, a first temperature sensor installed in the outlet pipe for detecting the temperature of the soybeans during heat exchange and the temperature of the boiling liquid, and a first temperature sensor for draining the steam supply pipe and depressurizing the steamer body. A third motor valve provided on the discharge pipe, a pressure sensor for detecting the steam pressure applied to the steam boiler body, and a drain in the steam supply pipe provided on the discharge pipe. The opening/closing and opening degree of each motor valve are automatically controlled via a computer according to the pressure and temperature signals from the pressure sensor, the first temperature sensor, and the second temperature sensor. It was designed to control the

Further, a broth tank is provided which is connected to the bottom of the boiling pot body via a coupler, and a third motor valve MV3 and a lower temperature sensor are provided to the broth outlet pipe connected to the bottom of the broth tank. A manual valve and a solenoid valve are installed in the steam outlet pipe connected to the top, and when the float switch installed inside the broth tank detects a predetermined amount of broth, it sends a signal to open the third motor valve, and the pressure sensor above sends a signal to open the third motor valve. When it is detected that the inside of the pot body reaches a predetermined pressure, the solenoid valve is opened (a signal is sent).

If the sauna plate is provided at the lower part of the straight cylindrical part of the steaming pot main body, the boiling liquid and steam can be detected and discharged separately, thereby facilitating the steaming operation.

〔Example〕

An embodiment of the present invention will be described below based on the accompanying drawings. In the drawings, the same reference numerals are used to refer to parts that are the same as or similar to those shown in the drawings of prior art devices.

In Fig. 1, B denotes the steamer body, a steam inlet pipe L2 that connects the boiler to the upper part of the steamer body B, a steam exhaust pipe L2 that connects to the steam inlet pipe L2, and discharges steam, and It has an outlet piping 3 for discharging steam and broth from the bottom of the main body B, and is further connected to the steam inlet auxiliary piping 4 connected to the bottom of the steam pot body B and the steam artificial auxiliary piping L4 for discharging steam. It has steam exhaust piping 5.

MVI, MV2. MV3. MV4 and MV5 are connected to piping 1 and piping L2. Piping L3. Piping L4 and piping L
The motor valve installed at 5 is operated by turning the motor on and off according to commands from the computer. Potentiometers are attached to these motor valves, which can control the opening degree of the valves. The motor valve MVI is a valve that turns on and off the injection of steam into the boiler body B of the steamer. The motor valve MV2 is a valve for draining the steam inlet pipe 1. The motor valve MV3 is a valve for draining, draining, and steaming during heat exchange of soybeans. Motor valve MV4 introduces steam from the bottom of the steamer body B (
This is a valve for supplementary input of steam from the bottom, as it is difficult for heat to reach the bottom, and for depressurization. motor? Shunshibu M
V5 is a valve for removing the drain from the steam inlet auxiliary pipe 4. P is a pressure sensor provided in the piping 1, which senses the steam pressure applied to the steam boiler body B. T1 is an upper temperature sensor provided in piping 2, which detects the drain in the steam piping from the boiler. T2 is a lower temperature sensor installed in the pipe 3, which senses the temperature of soybeans during heat exchange and also senses the temperature of the broth. Potentiometers are attached to the motor valves MVI-5, so that the opening degree of each motor valve can be controlled. IF is an interface, CPU is a computer, KB is a keyboard, CRT is a display, PRT is a printer, and B is a power supply panel.

This device attaches a pressure sensor to the steamer, extracts instantaneous pressure changes as an analog signal, and uses the motor valve M
V1. Automatic valve on the steam injection side of motor valve MV4 and motor valve MV2. -[-- Controls the opening and closing of automatic valves on the steam exhaust side of the motor valve MV3 and the motor valve MV5.

Further, it is preferable that the control method is not on/off but differential-integral control. The biggest advantage of steaming natto soybeans using the differential-integral division '+'ll is that pressure changes over time can be raised and lowered more smoothly. Furthermore, a single natto factory often uses multiple steaming pots, and when using multiple pots, the pressure in the pots may drop from time to time, but in this case, the on-off control such as a car is used. When the amount of steam is insufficient to meet the set pressure, the valve opens slightly, causing vibrations when the pressure returns to normal, creating the worst situation for steaming natto and soybeans. However, by using differential-integral control, there is an advantage that stable control of steam pressure can be achieved at all times.

An example of pressure steaming will be explained using the above-described configuration. Open the lid of the steamer, add the soaked soybeans, and close the lid. As an initial setting, motor valve MVI is closed and motor valve MV2 is closed.
Motor valve MV3 is also closed, motor valve MV3 is open, motor valve MV4 is closed, and motor valve MV5 is also closed. Then take the following steps. ■Open motor valve MV2. ■Open motor valve MV1. ■Steam begins to come out when the drain in the piping is removed. ■The upper temperature sensor T1 detects 90 to 100°C. This shows that only steam has been removed from the drain. ■Close motor valve MV2. ■0.8
Heat exchange is performed on the soybeans in the pot using a steam pressure of kg/cJ. The soybeans will warm up. ■Steam begins to come out after heat exchange. - Lower temperature sensor T2 detects 90 to 100°C. It can be seen that the drain inside the pot was drained and only steam was left. ■Close motor valve MV3. Increase the pressure inside the pot to 1.6 kg/cJ in 0.5 minutes. (DI, 6 kg/cI!
When the value reaches 1, open motor valve MV4 to potentiometer value 15 and close it immediately. ＠When the pressure inside the pot reaches the set value, open the motor valve MV3 to a potentiometer value of 8 to 9 to release steam and broth. ■Increase the pressure inside the pot to 2. Give it to Okg/cJ in 5 minutes. o2.0kg/
When crA is reached, close motor valve MVI. ■Leave the motor valve MV3 as it is and remove the steam from the motor valve MV2 to depressurize it. ■Reduce the pressure inside the pot to 1 kg/c in 45 minutes. ■When the pressure drops to 1 kg/cd, fully open motor valve MV2 and set the pressure to O. [phase]
Steaming is complete when the pressure becomes 0. [Phase] Remove the steamed soybeans from the pot.

In the above-mentioned embodiment, if there is a lot of broth coming out of the outlet piping 3, the motor valve MV3 is opened, and if there is less broth, the motor valve MV3 is closed. It was difficult to open and close the motor valve MV3 accurately because the motor valve MV3 came out together with the motor valve MV3.

Therefore, as shown in FIG. 2, a new broth tank b is provided, and the bottom of the steamer body B and this broth tank b are connected via a coupler K. The broth outlet pipe L3 connected to the bottom of the broth tank b is provided with a motor valve MV3 and a lower temperature sensor T2. This motor valve MV3 is operated to open when the float switch FS provided in the broth tank b detects a predetermined amount of broth. Further, a manual valve HV and a solenoid valve EV are provided in the steam outlet pipe 6 connected to the upper part of the broth tank b. This electromagnetic valve EV is operated to open when the pressure sensor P detects that the pressure in the steamer reaches a predetermined value.

With such a configuration, the boiling liquid and steam to be discharged are detected separately, and necessary operations are performed accordingly, allowing for more accurate steaming.

[Effects of the Invention] As described above, according to the present invention, the entire steaming operation is carried out under computer control, thereby making it possible to stabilize the steaming state and save labor.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing one embodiment of the present invention, Fig. 2 is a schematic explanatory diagram showing another embodiment of the present invention, and Fig. 3 is a schematic explanatory diagram showing an example of a conventional steaming apparatus. It is. B・-Steamer body, MVI~5-・・Motor valve, L
1 to 6... Piping.

Claims (2)

[Claims] (1) a steamer body, a steam injection pipe for introducing steam from the boiler into the steamer body, a first motor valve provided on the steam injection pipe, and steam from the steamer body; An outlet pipe for draining drain and broth, a second motor valve provided on the outlet pipe, and a second motor valve provided on the outlet pipe for detecting the temperature of soybeans during heat exchange and detecting the temperature of the broth. a first temperature sensor, a discharge pipe connected to the bottom of the steam boiler body for draining the steam supply pipe and depressurizing the steam boiler, and a third temperature sensor provided on the discharge pipe. It has a motor valve, a pressure sensor that detects the steam pressure applied to the steam boiler body, and a second temperature sensor that is installed in the discharge pipe and detects the drain in the steam supply pipe. An automatic soybean steaming device for natto, characterized in that the opening/closing and opening degree of each motor valve are automatically controlled via a computer according to pressure and temperature signals from one temperature sensor and a second temperature sensor. . (2) A broth tank is provided which is connected to the bottom of the boiling pot body via a coupler, and a third motor valve MV3 and a lower temperature sensor are provided to the broth outlet pipe connected to the bottom of the broth tank. A manual valve and a solenoid valve are installed in the steam outlet pipe connected to the top of the tank, and when a float switch installed inside the broth tank detects a predetermined amount of broth, it sends a signal to open the third motor valve, and the pressure sensor 2. The automatic soybean steaming device for natto according to claim 1, wherein when it is detected that the inside of the steam pot body reaches a predetermined pressure, a signal is sent to open the solenoid valve.