JP2019154260A - Temperature control device and method for storage tank - Google Patents

Abstract

To provide a temperature control device and method for a storage tank in which temperature of a fermentation body whose viscosity is high and fluidity is low, therefore convection cannot be easily generated, can be adjusted properly.SOLUTION: A controller 16 of a cooling controller 10 is configured so that, when temperature of a first temperature sensor 14 (temperature sensor 141 for a lower layer, first temperature sensor 142 for an upper layer) for measuring temperature in a tank of a fermentation tank 20, does not exceed a lower limit value of the first temperature set value, and temperature of a second temperature sensor 15 (second temperature sensor 151 for a bottom wall, second temperature sensor 152 for a side wall) for measuring temperature of a tank wall, does not exceed a lower limit value of the second temperature set value, when it is in a cooling period, an automatic value 13 (first automatic valve 131, second automatic valve 132) is opened, when it is not in the cooling period, the automatic value 13 is closed, when temperature measured by the first temperature sensor 14 does not exceed an upper limit value of the first temperature set value, the automatic value 13 is closed, when the temperature exceeds the upper limit value of the first temperature set value, if it is in the cooling period, the automatic valve 13 is opened, and if it is not in the cooling period, the automatic value 13 is closed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a storage tank temperature control device that controls the temperature of a stored product stored in a storage tank by cooling or heating, and a temperature control method therefor.

  As for the fermenter which is an example of a storage tank, temperature management is important in order to suppress the temperature rise by fermentation heat by cooling, making active the bacteria contained in the fermented body as a storage active. For example, in a fermenter for producing sake, a three-stage preparation (stage preparation) is performed in which rice bran, water, and steamed rice are added in three separate steps: first-applied, middle-applied, and soup. When the third stage is finished, the next step is moromi. In such a process, strict temperature management is performed in order to control saccharification and fermentation in which saccharification and fermentation proceed in parallel.

Regarding such temperature control, although it is heating, the one described in Patent Document 1 is known.
The temperature control method for fermenting organic matter at high speed described in Patent Document 1 stops the operation of the heating device at the upper limit temperature setting value of the tank wall until the temperature of the processed product in the tank reaches the upper limit temperature setting, The heating temperature is operated at the lower limit temperature setting value, and when the temperature of the processed material in the tank rises above the upper limit temperature setting value, heating is performed regardless of the temperature of the tank wall until the processing temperature in the tank reaches the lower limit temperature setting value. The operation of the apparatus is stopped.

JP-A-1-145390

However, in the temperature control method for fermenting organic matter at high speed described in Patent Document 1, immediately after the operation of the heating apparatus is stopped regardless of the temperature of the tank wall, the processing temperature in the tank reaches the lower limit temperature set value. If heating is performed until the temperature of the processed material in the tank reaches the upper limit temperature setting, the processed material in the tank will be heated rapidly, even if the temperature of the processed material in the tank exceeds the upper limit temperature setting and the operation of the heating device is stopped. The temperature may continue to rise for a while.
In particular, those having a high viscosity and low fluidity, such as soot, in which convection does not easily occur and heat is difficult to propagate through the entire soot are remarkable because the temperature change is slow.

  Therefore, the present invention provides a temperature control device for a storage tank and a temperature control method for the storage tank that can adjust the temperature appropriately even if the storage is difficult to generate convection because of its high viscosity and low fluidity. Objective.

  The storage tank temperature control device of the present invention is immersed in the storage stored in the storage tank, and is disposed on the tank wall of the storage tank, the first temperature sensor for measuring the temperature in the tank, A second temperature sensor for measuring the temperature, a temperature adjustment unit for adjusting the temperature of the storage tank by cooling with a heat medium, and a control device for controlling the delivery of the heat medium to the temperature adjustment unit, The control device decreases the temperature from the first temperature sensor and does not exceed the lower limit value of the first temperature set value, and decreases the temperature from the second temperature sensor and sets the lower limit value of the second temperature set value. When not exceeding, if the cooling period, the delivery of the heat medium to the temperature adjustment unit, and if not the cooling period, the delivery of the heat medium to the temperature adjustment unit is stopped, the temperature from the first temperature sensor is When the temperature does not exceed the upper limit of the first temperature set value, the temperature adjustment When the heating medium is stopped to be sent and the upper limit value of the first temperature set value is exceeded, the heating medium is sent to the temperature adjusting unit if it is a cooling period. The delivery of the heat medium to is stopped.

  Further, the present invention is a first temperature sensor that is immersed in a reservoir stored in a storage tank and measures a temperature in the tank, and is disposed on a tank wall of the storage tank and measures the temperature of the tank wall. A temperature control device for a storage tank, comprising two temperature sensors, a temperature adjustment unit for adjusting the temperature of the storage tank by cooling with a heat medium, and a control device for controlling the delivery of the heat medium to the temperature adjustment part In this temperature control method, the control device causes the temperature from the first temperature sensor to fall and does not exceed a lower limit value of the first temperature set value, and the temperature from the second temperature sensor to fall to a first level. 2 When the lower limit of the temperature set value is not exceeded, if the cooling period, the delivery of the heat medium to the temperature adjustment unit, if not, the delivery of the heat medium to the temperature adjustment unit is stopped, The temperature from the first temperature sensor rises and exceeds the upper limit of the first temperature set value If not, the supply of the heat medium to the temperature adjustment unit is stopped, and if the upper limit value of the first temperature set value is exceeded, the heat medium is sent to the temperature adjustment unit if the cooling period is exceeded. If not, the delivery of the heat medium to the temperature adjusting unit is stopped.

  According to the present invention, the temperature from the first temperature sensor decreases and does not exceed the lower limit value of the first temperature set value, and the temperature from the second temperature sensor decreases and exceeds the lower limit value of the second temperature set value. When there is not, if it is a cooling period, a control apparatus will send out a heat medium to a temperature control part, and will cool. Further, if the cooling period is not set, the supply of the heat medium to the temperature adjusting unit is stopped, and the flow of the heat medium to the temperature adjusting unit is stopped. When the temperature of the stored product rises and exceeds the upper limit value of the first temperature set value, the cooling medium is sent to the temperature adjusting unit to cool the cooling medium. The cooling medium is stopped by stopping the delivery of the heat medium. By doing so, if the temperature exceeds the upper limit value and it is cooled excessively, the lower limit value will be greatly interrupted when the temperature of the stored product decreases. Therefore, excessive cooling can be suppressed by closing the automatic valve if the cooling period is not exceeded even if the upper limit of the first temperature set value is exceeded.

A space cooling unit for cooling the space above the storage; and a space temperature sensor for measuring the space, wherein the control device is a lower limit value of the temperature drop of the space temperature sensor. Can be controlled to open and close the automatic valve in a state lower than the lower limit value of the first temperature set value.
By lowering the lower limit of the lowering of the temperature sensor for space that measures the space part below the lower limit of the first temperature set value, adjusting the temperature of the gas that is easy to convect and propagates quickly, In addition to cooling the storage by cooling, the storage can be cooled by cooling the gas in the space. Therefore, it is possible to cool the storage more effectively.

  In addition, the storage tank temperature control device of the present invention is immersed in the storage stored in the storage tank, and is disposed on the tank wall of the storage tank, the first temperature sensor for measuring the temperature in the tank, and the tank A second temperature sensor for measuring the temperature of the wall; a temperature adjusting unit for adjusting the temperature of the storage tank by heating with a heat medium; and a control device for controlling delivery of the heat medium to the temperature adjusting unit. The control device does not exceed an upper limit value of the first temperature set value by increasing the temperature from the first temperature sensor, and increases an upper limit value of the second temperature set value by increasing the temperature from the second temperature sensor. When the value is not exceeded, the heating medium is sent to the temperature adjusting unit if it is a heating period, and the heating medium is stopped to be sent to the temperature adjusting part if it is not a heating period. When the temperature falls and does not exceed the lower limit of the first temperature set value, When the heating medium is stopped to be sent to the temperature adjusting unit and the lower limit value of the first temperature set value is exceeded, the heating medium is sent to the temperature adjusting unit if it is a heating period. The delivery of the heat medium to the adjustment unit is stopped.

  Further, the present invention is a first temperature sensor that is immersed in a reservoir stored in a storage tank and measures a temperature in the tank, and is disposed on a tank wall of the storage tank and measures the temperature of the tank wall. A temperature control device for a storage tank, comprising: 2 temperature sensors; a temperature adjustment unit for adjusting the temperature of the storage tank by heating with a heat medium; and a control device for controlling the delivery of the heat medium to the temperature adjustment unit. In this temperature control method, the control device causes the temperature from the first temperature sensor to rise and does not exceed the upper limit value of the first temperature set value, and the temperature from the second temperature sensor rises to 2 When the upper limit value of the temperature set value is not exceeded, if the heating period, the delivery of the heat medium to the temperature adjustment unit, if not heating period, the delivery of the heat medium to the temperature adjustment unit is stopped, The temperature from the first temperature sensor drops and exceeds the lower limit of the first temperature set value When there is not, the delivery of the heat medium to the temperature adjustment unit is stopped, and when the lower limit value of the first temperature set value is exceeded, the heating medium is delivered to the temperature adjustment unit if the heating period is exceeded. If not, the delivery of the heat medium to the temperature adjusting unit is stopped.

In the present invention, even when the temperature adjusting unit adjusts the temperature of the storage tank by heating with a heat medium, it can be operated in the same manner as in cooling.
That is, when the temperature from the first temperature sensor rises and does not exceed the upper limit value of the first temperature set value, and the temperature from the second temperature sensor rises and does not exceed the upper limit value of the second temperature set value, If it is a heating period, the control device sends the heat medium to the temperature adjustment unit and heats it. If not, the control device stops sending the heat medium to the temperature adjustment unit and supplies the heat medium to the temperature adjustment unit. Stop the flow. Then, when the temperature of the stored material falls and exceeds the lower limit value of the first temperature set value, the heating medium is sent and heated to the temperature adjustment unit if it is a heating period. Heating is stopped by stopping the delivery of the heat medium to the adjusting unit. By doing so, if the temperature exceeds the lower limit value and is heated excessively, the upper limit value will be greatly interrupted when the temperature of the reservoir rises. Therefore, even if the lower limit value of the first temperature set value is exceeded, if it is not the heating period, excessive heating can be suppressed by stopping the delivery of the heat medium.

  A space temperature adjusting unit for adjusting the temperature of the space part above the reservoir; and a space temperature sensor for measuring the space part, wherein the control device is configured to control a temperature of the space temperature sensor. By controlling the temperature adjustment unit in a state where the upper limit value is higher than the upper limit value of the first temperature set value, the gas in the space portion can be heated to heat the stored material in the same manner as during cooling. it can.

  The temperature adjusting unit includes an upper layer temperature adjusting unit that cools an upper layer part of the stored material, and a lower layer temperature adjusting unit that cools a lower layer part of the stored material, and the second temperature sensor includes the stored material. In order to measure the temperature of the tank wall corresponding to the upper layer part of the reservoir, in order to measure the temperature of the tank wall corresponding to the upper layer part of the reservoir, and the second temperature sensor for the side wall disposed in the side wall part of the storage tank And a second temperature sensor for the bottom wall disposed on the bottom wall of the storage tank.

  Finer temperature control is possible by dividing the storage tank into a temperature adjusting unit for the upper layer and a temperature adjusting unit for the lower layer and adjusting the temperature. In particular, as a temperature sensor for measuring the lower layer portion of the stored substance, since it is measured by the second temperature sensor for the bottom wall disposed on the bottom wall portion, not the sensor disposed on the side wall portion, the tank wall of the lower layer portion is accurately Temperature can be measured.

According to the cooling of the present invention, even if the upper limit value of the first temperature set value is exceeded, if it is not the cooling period, appropriate temperature management can be performed by stopping the delivery of the heat medium to the temperature adjustment unit. Since the viscosity is high and the fluidity is low, proper temperature adjustment is possible even for a reservoir in which convection hardly occurs.
Further, according to the heating of the present invention, if the heating period is not exceeded even if the lower limit value of the first temperature set value is exceeded, proper temperature management can be performed by stopping the delivery of the heat medium to the temperature adjusting unit. Therefore, since the viscosity is high and the fluidity is low, it is possible to adjust the temperature appropriately even for a reservoir in which convection hardly occurs.

It is a figure which shows the structure of the cooling control apparatus which concerns on embodiment of this invention. It is a figure for demonstrating the cooling part for upper layers of a cooling control apparatus shown in FIG. 1, a heat retention part, and the 1st temperature sensor for upper layers. It is a block diagram of a structure of the control apparatus of the cooling control apparatus shown in FIG. It is a flowchart for demonstrating operation | movement of the control apparatus of the cooling control apparatus shown in FIG. It is a flowchart for demonstrating the temperature management control of the space part of the control apparatus shown in FIG. It is a flowchart for demonstrating the temperature management control of the lower layer part of the control apparatus shown in FIG. It is an example of the graph for demonstrating the state of the temperature of the storage tank controlled by the cooling control apparatus shown in FIG.

A fermenter cooling control apparatus, which is an example of a storage tank temperature control apparatus according to an embodiment of the present invention, will be described with reference to the drawings.
The cooling control apparatus 10 shown in FIG. 1 manages fermentation temperature by managing the temperature of koji, which is an example of a fermented product stored in a fermenter 20 that is an example of a storage tank.
The fermenter 20 includes a tank body 21 in which straw is stored, a lid part 22 that closes an opening 21a (input port) of the tank body 21, and a pedestal part 23 that supports the tank body 21.
The tank body 21 includes a bottom wall portion 211 connected to the pedestal portion 23, a cylindrical side wall portion 212 having a discharge port 21b formed in the lower portion, and a top surface portion 213 having an opening portion 21a formed therein. .

  The cooling control device 10 includes a refrigerator 11 that sends out a refrigerant as a heat medium, a circulation path 12 through which the refrigerant from the refrigerator 11 circulates, an automatic valve 13 that sends and stops the refrigerant to the circulation path 12, The 1st temperature sensor 14 for measuring the temperature inside a tank, the 2nd temperature sensor 15 for measuring the temperature of a tank wall, and the control apparatus 16 which controls the temperature of the fermenter 20 are provided.

In order to cool the fermenter 20, the refrigerator 11 has a function of cooling the refrigerant to a range of −15 ° C. to −17 ° C. and sending it to the circulation path 12. The refrigerator 11 is provided with a refrigerant temperature sensor (not shown) for measuring the refrigerant returning from the fermenter 20, and is connected to the control device 16.
The circulation path 12 is a cooling section 122 (temperature) having a delivery section 121 that is a pipe from the refrigerator 11 to the fermentation tank 20, a cooling pipe 1221 wound around the fermentation tank 20, and a heat retaining section 1222 that covers the fermentation tank 20. Adjustment part) and the inflow part 123 which is a piping which a refrigerant | coolant returns from the cooling part 122 to the refrigerator 11 is provided.

  The delivery unit 121 is provided with a high pressure gauge 121a for measuring the pressure of the refrigerant. The inflow portion 123 is provided with a low-pressure manometer 123a for measuring the refrigerant pressure.

The cooling part 122 is wound around the lower part of the side wall part 212 of the fermenter 20, and cools the lower layer part 21x of the straw stored in the fermenter 20, and a side wall part 122a (lower temperature control part). 212 is wound around an upper layer cooling portion 122b (upper layer temperature adjusting portion) that cools the upper layer portion 21y of the basket, and is wound around the upper portion of the side wall portion 212 and the top surface portion 213 so as to be above the kite. A space cooling unit 122c (space temperature adjusting unit) that cools the space 21z.
The heat retaining part 1222 is not only disposed on the cooling pipe 1221 when wound around the side wall part 212 and the top surface part 213, but is also installed so as to cover the lid part 22. For the heat retaining unit 1222, a heat insulating material such as urethane, polystyrene foam, or glass wool can be used.

The automatic valve 13 includes a first automatic valve 131, a second automatic valve 132, and a third automatic valve 133.
The first automatic valve 131 is provided at a connection portion between the lower layer cooling unit 122 a and the delivery unit 121. The second automatic valve 132 is provided at a connection portion between the upper layer cooling section 122 b and the delivery section 121. The third automatic valve 133 is provided at a connection portion between the space cooling unit 122 c and the delivery unit 121.

The wiring from the first temperature sensor 14 and the second temperature sensor 15 is connected to the control device 16.
In the present embodiment, as the first temperature sensor 14 and the second temperature sensor 15, a resistance element (a resistance temperature detector) of the measurement unit is used that measures temperature based on a resistance value that varies with temperature. A thermocouple may be used.
In the first temperature sensor 14, the measurement unit 14b is suspended from the sensor body 14a by wiring.
The first temperature sensor 14 includes a first temperature sensor 141 for a lower layer for measuring the temperature of the lower layer portion 21x of the basket and a first temperature sensor 142 for the upper layer for measuring the temperature of the upper layer portion 21y of the basket. ing.
In addition, in the space portion 21z above the bag, a space temperature sensor 17 for measuring the temperature of the space portion 21z hangs the measurement portion from the sensor main body by wiring in the same manner as the first temperature sensor 14.

The 2nd temperature sensor 15 is installed in the state where the protective tube which incorporated the resistance element extended from a sensor main body contacted or brought close to the tank wall (bottom wall part 211, side wall part 212).
The second temperature sensor 15 is used for measuring the temperature of the bottom wall portion 211 corresponding to the lower layer portion 21x and the temperature of the side wall portion 212 corresponding to the upper layer portion 21y. And a second temperature sensor 152 for the side wall.

The control device 16 is a computer that manages the temperature of the fermenter 20 by controlling the opening and closing of the automatic valve 13 based on the temperatures measured by the first temperature sensor 14 and the second temperature sensor 15.
As illustrated in FIG. 3, the control device 16 includes a communication unit 161, a signal input unit 162, a signal output unit 163, an operation unit 164, a display unit 165, a processing unit 166, and a storage unit 167. ing.

  The communication unit 161 has a function of receiving information from the Internet W, which is an example of a telecommunication line, and outputting the information to the processing unit 166, or inputting information from the processing unit 166 and transmitting the information to the Internet W. The measurement history read by the processing unit 166 from the storage unit 167 is transmitted to the external terminal device via the communication unit 161 through the Internet W, and displayed on the terminal device, whereby the temperature of the fermenter 20 is measured by each temperature sensor. The condition can be monitored remotely.

The signal input unit 162 receives analog signals from the first temperature sensor 14, the second temperature sensor 15, and the refrigerant temperature sensor, converts them into digital signals, and outputs them to the processing unit 166.
The signal output unit 163 receives the digital signal from the processing unit 166, converts it into an analog signal, and outputs it to the automatic valve 13.
The operation unit 164 is used for inputting a set value serving as a reference for temperature management. The display unit 165 is a display that can display a set value or a temperature state.

The processing unit 166 outputs a signal instructing opening / closing of the automatic valve 13 based on the signal indicating the temperature from the first temperature sensor 14 and the second temperature sensor 15 input from the signal input unit 162 and the set value. To the unit 163. The processing unit 166 has a built-in timer.
The timer performs counting that repeats the freezing period and the non-freezing period based on the set value.
The storage unit 167 stores the measurement history of the first temperature sensor 14, the second temperature sensor 15, and the refrigerant temperature sensor, the set value of the control temperature, and the like.

The operation | movement and use condition of the cooling control apparatus 10 of the fermenter 20 which concerns on embodiment of this invention comprised as mentioned above are demonstrated based on FIG. 1, FIG.
First, the administrator operates the operation unit 164 while inputting a setting value while viewing the setting screen (not shown) displayed on the display unit 165 by the processing unit 166 of the control device 16 (step S10).

The set value can be the temperature inside the tank (first temperature set value) and the temperature of the tank wall (second temperature set value). The temperature of the tank wall is lower than the temperature inside the tank because it is cooled by the cooling unit 122.
For example, the upper limit value of the first temperature set value can be 10.5 ° C., and the lower limit value can be 10.0 ° C. Further, the upper limit value of the second temperature set value can be 5.5 ° C., and the lower limit value can be 3.9 ° C.

Further, the set value is set in units of a cooling period (temperature adjustment period) of a timer built in the processing unit 166 and a non-cooling period (period not a temperature adjustment period) that is not a cooling period. For example, the cooling period and the non-cooling period can each be 5 minutes.
These set values can be appropriately determined according to the type, state, fermenter capacity, and fermenter structure of the koji. The processing unit 166 stores the set value in the storage unit 167.

When the temperature setting is completed, the administrator activates the temperature control of the cooling control device 10.
The processing unit 166 starts a built-in timer (step S20).

And the process part 166 performs temperature management control of the space part 21z first (step S30).
The processing unit 166 inputs a signal from the space temperature sensor 17 via the signal input unit 162.
The processing unit 166 determines whether the temperature of the space portion 21z is rising or falling from the change in temperature from the space temperature sensor 17 (step S110).
If it is determined in step S110 that the temperature is decreasing, the cooling is stopped during or after cooling, but the temperature of the cooled space portion 21z gradually increases from the tank wall to the inside of the tank. It shows a spread state.

Accordingly, the processing unit 166 is set to an uncooled state (step S120).
This uncooled state is a state in which the third automatic valve 133 is closed. If the state of the third automatic valve 133 so far is open, it is closed, and if it is closed, it remains as it is. Is.

  After step S120, the temperature management control of the space portion 21z is finished, and when step S30 shown in FIG. 4 is finished, the next steps S40 and S50 are executed, and it is determined whether or not the process is finished in step S60. Again, the temperature management control of the space part 21z of step S30 is performed.

  If the fermentation heat of koji spreads to the space portion 21z and the temperature of the space portion 21z starts to rise due to the cooling being stopped, the process proceeds to step S130 in the determination at step S110.

The processing unit 166 determines whether or not the increase in temperature from the space temperature sensor 17 exceeds the upper limit value of the first temperature set value (step S130). Here, the temperature setting of the space portion 21z is the same as the temperature setting of the lower layer portion 21x and the upper layer portion 21y, and the first temperature setting value is used.
If it is determined in step S130 that the temperature rise does not exceed the upper limit value of the first temperature set value, the temperature rise is allowed to the upper limit value of the first temperature set value, so the processing unit 166 In a non-cooled state (step S120).

If it is determined in step S130 that the temperature rise has exceeded the upper limit value of the first temperature set value, the processing unit 166 determines whether the timer is in the cooling period or the non-cooling period ( Step S140).
When it is determined that the timer indicates the non-cooling period, the processing unit 166 sets the non-cooling state (step S120).

When it is determined in step S140 that the timer indicates the cooling period, the processing unit 166 sets the cooling state (step S150).
The cooling state is a state in which the third automatic valve 133 shown in FIG. 1 is opened. If the state of the third automatic valve 133 so far is closed, it is opened, and if it is opened, it remains as it is. It is what.
When the third automatic valve 133 is in an open state, the refrigerant from the refrigerator 11 passes through the third automatic valve 133 via the delivery unit 121 and flows into the space cooling unit 122c, so that the side wall of the tank body 21 The upper portion of the portion 212 and the top surface portion 213 are cooled.
By doing so, the space part 21z of the tank main body 21 is cooled, and the rise in temperature can be changed to the fall.
In this way, the temperature of the space portion 21z above the straw of the fermenter 20 is adjusted.

  As shown in FIG. 4, when the temperature management control (step S30) of the space portion 21z is completed, the processing unit 166 next performs the temperature management control of the upper layer portion 21y of the basket shown in FIG. 1 (step S40).

In the temperature management control of the upper layer portion 21y, first, the processing unit 166 inputs a signal from the upper layer first temperature sensor 142 via the signal input unit 162.
As illustrated in FIG. 6, the processing unit 166 determines whether the temperature is rising or falling from the temperature change from the upper-layer first temperature sensor 142 (step S <b> 210).
If it is determined in step S210 that the temperature is decreasing, the cooling is stopped during or after cooling, but the temperature of the cooled upper layer portion 21y is transferred from the tank wall to the inside of the tank. It shows a gradually expanding state.

  Next, the processing unit 166 determines whether or not the temperature drop from the upper layer first temperature sensor 142 exceeds the lower limit value of the first temperature set value (step S220).

If it is determined in step S220 that the lower limit value of the first temperature set value is not exceeded, the processing unit 166 then determines that the temperature drop of the second temperature sensor 152 for the side wall is the second temperature set value. It is determined whether or not a lower limit value is exceeded (step S230).
If it is determined in step S230 that the lower limit value of the second temperature set value has been exceeded, the processing unit 166 enters an uncooled state and waits for a conversion to a temperature increase due to fermentation heat (step S240).

  When the temperature management control of the upper layer portion 21y is finished after the transition from Step S240 and Step S40 shown in FIG. 4 is finished, the next Step S50 is executed, and it is determined whether or not the Step S60 is finished. The temperature management control of the upper layer portion 21y of S40 is executed.

In step S210, it is determined that the temperature is decreasing. In step S220, it is determined that the lower limit value of the first temperature set value is not exceeded. In step S230, the lower limit value of the second temperature set value is exceeded. If it is determined that there is no, the soot can be cooled to the lower limit value of the second temperature set value, and then the processing unit 166 determines whether the timer is in the cooling period or the non-cooling period ( Step S250).
When it is determined in step S250 that the timer indicates the non-cooling period, the processing unit 166 sets the non-cooling state (step S240).

In Step S230, when it is determined that the timer indicates the cooling period, the processing unit 166 sets the cooling state (Step S260).
The cooling state is a state in which the second automatic valve 132 shown in FIG. 1 is opened. If the state of the second automatic valve 132 so far is closed, the second automatic valve 132 is opened. It is what.

When the second automatic valve 132 is in the open state, the refrigerant from the refrigerator 11 passes through the second automatic valve 132 via the delivery unit 121 and flows into the upper layer cooling unit 122b that functions as the upper layer temperature adjustment unit. To do. Thus, the process part 166 can cool the center part of the side wall part 212 of the tank main body 21 because a refrigerant | coolant is sent to the cooling part 122b for upper layers.
By doing so, the upper layer part 21y of the tank main body 21 is cooled, and the fall of temperature can be lowered to the lower limit value of the second temperature set value.

If it is determined in step S220 that the lower limit value of the first temperature set value has been exceeded, the processing unit 166 enters an uncooled state, and the processing unit 166 sends the refrigerant to the upper layer cooling unit 122b. It stops and waits for the conversion to the temperature rise by fermentation heat (step S240).
This uncooled state is a state in which the second automatic valve 132 is closed. If the state of the second automatic valve 132 so far is open, the second automatic valve 132 is closed. Is.

Next, when the temperature of the koji is converted to a temperature rise due to fermentation heat, it is determined in step S210 that the temperature of the upper layer portion 21y of the koji is rising.
Next, the processing unit 166 determines whether or not the increase in the temperature of the upper-layer first temperature sensor 142 exceeds the upper limit value of the first temperature setting value (step S270).

If it is determined in step S270 that the temperature rise does not exceed the upper limit value of the first temperature set value, the temperature rise is allowed to the upper limit value of the first temperature set value, so the processing unit 166 In a non-cooled state (step S240).
When it is determined in step S270 that the temperature rise has exceeded the upper limit value of the first temperature set value, the processing unit 166 determines whether the timer is in the cooling period or the non-cooling period (step S270). S250).

When it is determined in step S250 that the timer indicates the cooling period, the soot in the upper layer portion 20y of the tank body 21 becomes too high, so that the processing unit 166 enters a cooling state (step S260). .
In Step S250, when it is determined that the timer indicates the non-cooling period, the processing unit 166 sets the non-cooling state (Step S240).

  As shown in FIG. 4, when the temperature management control (step S40) of the upper layer portion 21y of the straw is finished, the processing unit 166 next performs the temperature management control of the lower layer portion 21x of the straw shown in FIG. 1 (step S50). ).

  In the temperature management control of the lower layer portion 21x, in the temperature management control of the upper layer portion 21y shown in FIG. 6, the first temperature sensor 142 for the upper layer is the first temperature sensor 141 for the lower layer, and the second temperature sensor 152 for the side wall is for the bottom wall. Since only the second temperature sensor 152 and the cooling part 122 through which the refrigerant flows are replaced from the upper layer cooling part 122b to the lower layer cooling part 122a, the control method from step S210 to step S260 is the same, and the description is omitted.

When the temperature management control of the lower layer portion 21x is finished, the processing unit 166 next determines whether or not the processing is finished (step S60).
If the manager has not instructed termination, the process returns to the temperature management control of the space portion in step S30, and steps S30 to S60 are repeated.
If it determines with it being complete | finished in step S60, the process part 166 will complete | finish temperature control.

  Thus, even if the temperature rise of the soot exceeds the upper limit value of the first temperature set value, when it is a non-cooling period, in order not to perform cooling, by cooling the tank wall in small increments, It is possible to prevent the temperature in the tank from being drastically lowered and greatly decrease the temperature in the tank from being lower than the lower limit value of the first temperature set value.

  Since the cooling control device 10 individually adjusts the temperature of the upper layer portion 21y and the lower layer portion 21x, the viscosity is high and the fluidity is low. Therefore, the convection hardly occurs and the heat does not easily propagate. However, proper temperature adjustment can be realized, and strict temperature control is possible.

Moreover, since the temperature of the space part 21z of the tank main body 21 located above the tub stored in the tank main body 21 is individually controlled, the temperature of the gas that is easy to convect and has a quick temperature propagation can be adjusted. Therefore, not only can the temperature be adjusted from the tank wall (the bottom wall portion 211 and the side wall portion 212), but the temperature of the soot can be adjusted by the gas in the space portion 21z.
In the present embodiment, in the first temperature setting value, the space portion 21z, the upper layer portion 21y, and the lower layer portion 21x are the same, but the lower limit value of the first temperature setting value of the space portion 21z is set to the first By setting the temperature lower than the lower limit value of the temperature setting value, not only can the tank wall be cooled to cool the soot, but also the gas in the space 21z can be cooled to cool the soot. Therefore, the soot can be cooled more effectively.

Since the temperature of the tank wall of the lower layer part 21x of the tank body 21 is measured not by the sensor arranged on the side wall part 212 but by the second temperature sensor 151 for the bottom wall arranged on the bottom wall part 211, the lower layer is accurately measured. The temperature of the tank wall of the part 21x can be measured.
Furthermore, a cooling part can also be provided in the lid part 22. For example, by providing a cooling element using the Peltier effect in the lid part 22, the space part 21 z can be effectively cooled, and the temperature can be adjusted from the tank wall of the entire tank body 21.

  In the present embodiment, the cooling pipe 1221 is wound around the side wall portion 212 and the top surface portion 213 of the fermenter 20, and the cooling portion 122 is covered with the heat retaining portion 1222. However, as a water jacket type cooling portion, Good.

  In the present embodiment, the second temperature sensor 15 (the second temperature sensor 151 for the bottom wall, the second temperature sensor 152 for the side wall) has a temperature measurement position on the tank wall (the bottom wall portion 211 and the side wall portion 212). It is installed in contact or in close proximity, but if it can directly or indirectly measure the temperature of the tank wall, it is placed in the tank body 21 and in contact with or close to the tank wall. Also good.

As described above, in the present embodiment, the case where the koji is cooled by the temperature control device has been described, but the present invention can also be applied to the case where the fermented material is heated.
For example, when producing soy sauce, the koji stored in the fermenter may be heated and induced to 14 ° C to 30 ° C.
In such a case, the refrigerator 11 (see FIG. 1) is a heater, and for the temperature set value, the upper limit value is replaced with the lower limit value and the lower limit value is replaced with the upper limit value. By controlling the delivery of, a precise temperature adjustment is possible even with heating.

Furthermore, this invention can be applied not only to the fermenter which ferments a fermented body but to the case where the storage tank which stores a stored thing is cooled or heated.
In addition, in the storage tank for storing sake, the effect of maintaining the quality can be expected by lowering the temperature at the boundary between the sake and gas by keeping the upper space at a temperature lower than that of sake.
In addition, the temperature adjustment control method of the present invention can be applied as a freeze prevention function or a local heating prevention function for stored products (sake) in a storage tank that stores sake at low temperatures in a temperature range close to the freezing temperature.

  Since the present invention has high viscosity and low fluidity, the present invention is suitable for temperature control of a fermented product that hardly generates convection, and is optimal for temperature control when producing sake.

DESCRIPTION OF SYMBOLS 10 Cooling control apparatus 11 Refrigerator 12 Circulation path 121 Sending part 121a Pressure gauge 122 Cooling part (temperature adjustment part)
1221 Cooling pipe 122a Cooling section for lower layer (temperature adjusting section for lower layer)
122b Cooling unit for upper layer (temperature adjusting unit for upper layer)
122c Space cooling unit (space temperature control unit)
1222 Insulating section 123 Inflow section 123a Pressure gauge 13 Automatic valve 131 First automatic valve 132 Second automatic valve 133 Third automatic valve 14 First temperature sensor 14a Sensor body 14b Measuring section 141 First temperature sensor for lower layer 142 First for upper layer Temperature sensor 15 Second temperature sensor 151 Second temperature sensor for bottom wall 152 Second temperature sensor for side wall 16 Control device 161 Communication unit 162 Signal input unit 163 Signal output unit 164 Operation unit 165 Display unit 166 Processing unit 167 Storage unit 17 Space Temperature sensor 20 Fermenter 21 Tank body 211 Bottom wall part 212 Side wall part 213 Top part 21a Opening part 21b Outlet 21x Lower layer part 21y Upper layer part 21z Space part 22 Lid part 23 Base part W Internet

Claims (8)

A first temperature sensor that is immersed in a reservoir stored in a storage tank and measures a temperature in the tank;
A second temperature sensor arranged on the tank wall of the storage tank and measuring the temperature of the tank wall;
A temperature adjusting unit for adjusting the temperature of the storage tank by cooling with a heat medium;
A control device for controlling the delivery of the heat medium to the temperature adjustment unit,
The control device includes:
When the temperature from the first temperature sensor falls and does not exceed the lower limit value of the first temperature set value, and the temperature from the second temperature sensor falls and does not exceed the lower limit value of the second temperature set value , If the cooling period, send the heat medium to the temperature adjustment unit, if not cooling period, stop sending the heat medium to the temperature adjustment unit,
When the temperature from the first temperature sensor rises and does not exceed the upper limit value of the first temperature set value, the sending of the heat medium to the temperature adjustment unit is stopped, and when the upper limit value of the first temperature set value is exceeded In addition, the temperature control device for a storage tank sends out the heat medium to the temperature adjusting unit if it is a cooling period, and stops sending the heat medium to the temperature adjusting part if it is not the cooling period. A space temperature adjusting unit for adjusting the temperature of the space above the reservoir, and a space temperature sensor for measuring the space,
The said control apparatus is a temperature control apparatus of the storage tank of Claim 1 which controls the said temperature adjustment part in the state in which the lower limit of the temperature of the said temperature sensor for space is lower than the lower limit of the said 1st temperature setting value. A first temperature sensor that is immersed in a reservoir stored in a storage tank and measures a temperature in the tank;
A second temperature sensor arranged on the tank wall of the storage tank and measuring the temperature of the tank wall;
A temperature adjusting unit for adjusting the temperature of the storage tank by heating with a heat medium;
A control device for controlling the delivery of the heat medium to the temperature adjustment unit,
The control device includes:
When the temperature from the first temperature sensor rises and does not exceed the upper limit value of the first temperature set value, and when the temperature from the second temperature sensor rises and does not exceed the upper limit value of the second temperature set value , If it is a heating period, send out the heat medium to the temperature adjustment unit, if not heating period, stop sending the heat medium to the temperature adjustment unit,
When the temperature from the first temperature sensor falls and does not exceed the lower limit value of the first temperature set value, the delivery of the heat medium to the temperature adjustment unit is stopped, and when the lower limit value of the first temperature set value is exceeded In addition, the storage tank temperature control device sends out the heat medium to the temperature adjustment unit during the heating period, and stops sending the heat medium to the temperature adjustment unit during the heating period. A space temperature adjusting unit for adjusting the temperature of the space above the reservoir, and a space temperature sensor for measuring the space,
The said control apparatus is a temperature control apparatus of the storage tank of Claim 3 which controls the said temperature adjustment part in the state in which the upper limit of the temperature of the said temperature sensor for space is higher than the upper limit of the said 1st temperature setting value. The temperature adjusting unit includes an upper layer temperature adjusting unit for adjusting the temperature of the upper layer part of the stored material, and a lower layer temperature adjusting unit for adjusting the temperature of the lower layer part of the stored material,
In order to measure the temperature of the tank wall corresponding to the upper layer part of the stored matter, the second temperature sensor is provided on the second temperature sensor for the side wall disposed on the side wall part of the storing tank, and the upper layer part of the stored matter. 5. The storage tank according to claim 1, further comprising: a second temperature sensor for a bottom wall disposed on a bottom wall portion of the storage tank in order to measure a temperature of the corresponding tank wall. Temperature control device.   The temperature control device for a storage tank according to any one of claims 1 to 5, wherein a temperature adjustment unit is provided in a lid portion that closes an input port formed in the tank body of the storage tank. A first temperature sensor that is immersed in a reservoir stored in a storage tank and measures a temperature in the tank;
A second temperature sensor arranged on the tank wall of the storage tank and measuring the temperature of the tank wall;
A temperature adjusting unit for adjusting the temperature of the storage tank by cooling with a heat medium;
A temperature control method for a temperature control device for a storage tank, comprising a control device for controlling the delivery of the heat medium to the temperature adjustment unit,
The control device is
When the temperature from the first temperature sensor falls and does not exceed the lower limit value of the first temperature set value, and the temperature from the second temperature sensor falls and does not exceed the lower limit value of the second temperature set value, If it is a cooling period, it sends out the heat medium to the temperature adjustment unit, and if it is not the cooling period, it stops sending the heat medium to the temperature adjustment unit,
When the temperature from the first temperature sensor rises and does not exceed the upper limit value of the first temperature set value, the sending of the heat medium to the temperature adjustment unit is stopped, and when the upper limit value of the first temperature set value is exceeded In addition, the temperature control method of the storage tank temperature control device stops sending the heat medium to the temperature adjusting unit if it is a cooling period and stops sending the heat medium to the temperature adjusting part if it is not the cooling period. A first temperature sensor that is immersed in a reservoir stored in a storage tank and measures a temperature in the tank;
A second temperature sensor arranged on the tank wall of the storage tank and measuring the temperature of the tank wall;
A temperature adjusting unit for adjusting the temperature of the storage tank by heating with a heat medium;
A temperature control method for a temperature control device for a storage tank, comprising a control device for controlling the delivery of the heat medium to the temperature adjustment unit,
The control device is
When the temperature from the first temperature sensor rises and does not exceed the upper limit value of the first temperature set value, and the temperature from the second temperature sensor rises and does not exceed the upper limit value of the second temperature set value, If it is a heating period, it sends out the heat medium to the temperature adjusting part, and if it is not a heating period, it stops sending the heat medium to the temperature adjusting part,
When the temperature from the first temperature sensor falls and does not exceed the lower limit value of the first temperature set value, the delivery of the heat medium to the temperature adjustment unit is stopped, and when the lower limit value of the first temperature set value is exceeded In addition, the temperature control method of the temperature control device of the storage tank that sends out the heat medium to the temperature adjusting unit if it is a heating period and stops sending the heat medium to the temperature adjusting part if it is not a heating period.