JPH07114667B2 - Temperature / humidity adjusting device for Nori drying room - Google Patents

Description

The present invention relates to a temperature / humidity adjusting device for controlling relative humidity in a laver drying chamber.

[Conventional technology]

In producing dry seaweed, it is practiced to make seaweed on a seaweed cage and dry it in a drying chamber.

Since the quality of dry seaweed depends on the humidity in the drying room, it is important to properly manage the humidity.

As a conventional method and apparatus for drying seaweed, there are those described in Japanese Patent Publication No. 57-56872 or Japanese Patent Publication No. 63-60986.

In the former Japanese Examined Patent Publication No. 57-56872, when the humidity inside the drying chamber is below a set humidity, when the humidity adjusting means is used regardless of the temperature inside the drying chamber or when the temperature inside the drying chamber is above the reference temperature. There is disclosed a seaweed drying method for preventing overdrying of seaweed by turning off the burner of the combustion furnace and stopping the generation of the amount of heat by the temperature adjusting means regardless of the humidity in the drying chamber.

However, the temperature in the drying chamber is low and the relative humidity is high before the start of drying the seaweed. In the above method, when the burner is operated, the temperature inside the drying chamber gradually rises and the relative humidity gradually falls. It takes a considerable amount of time for the seaweed to enter the drying chamber and the humidity in the drying chamber to reach the set humidity.

Further, Japanese Patent Publication No. Sho 63-60986 cited above describes the following humidity adjusting device for a seaweed drying chamber.

First, when the humidity in the nori drying chamber is detected by the humidity detector and the humidity is higher than the reference value, the exhaust fan is driven to exhaust the water in the nori drying chamber to lower the humidity. After a certain period of time, the humidity detector again measures the humidity in the laver drying room. If the humidity is higher than the reference value, the heater is controlled to raise the temperature in the laver drying room by a predetermined temperature to lower the relative humidity. If the humidity in the nori drying room is lower than the reference value, stop the rotation of the exhaust fan when it is rotating, and if the humidity in the nori drying room is still below the reference value, control the heater to control the temperature of the nori drying room. Is lowered by a predetermined temperature. By repeating this operation, the humidity in the nori drying room is controlled to be constant.

However, in this conventional technique, when the proportion of seaweed occupying the drying chamber gradually increases, the humidity in the drying chamber also tends to gradually increase. When the humidity control operation as described above is performed in such a state, the temperature inside the drying chamber also gradually rises, and the temperature tends to become excessively high, resulting in poor drying of seaweed. In addition, it is wasteful to consume thermal energy, which is uneconomical.

Furthermore, since the humidity in the drying chamber is high at the start of drying the seaweed, the exhaust fan operates, exhausting high-humidity air as well as high-temperature air, and the temperature inside the drying chamber does not rise easily, saving energy The operation is against the request.

In addition, since the humidity is high as described above when the dryer is started and before the heater is ignited, the regulator raises the target temperature in order to lower the humidity. After ignition of the heater, the humidity decreases as the temperature inside the drying chamber rises. At this time, as described above, the drop in humidity is further increased by raising the reference temperature, and the time for the humidity in the drying chamber to return to the setting is also extended. For this reason, a method has been adopted in which the operation start time of the dryer is manually operated without depending on the adjuster, and is switched to the automatic humidity adjusting method by the adjuster when the humidity is stable.

[Problems to be Solved by the Invention]

Therefore, the present invention prevents the temperature and humidity in the drying chamber at the start of drying from dropping too much and accelerates the synchronization to the set humidity,
A technical issue is to prevent waste of energy and enable automatic operation immediately after the start of operation.

[Means for Solving the Problems]

The present invention, a temperature detector and a humidity detector for detecting the temperature and humidity in the nori drying chamber, an exhaust fan arranged in the nori drying chamber, a heater for controlling the temperature in the nori drying chamber, A temperature / humidity adjusting device for a laver drying room, comprising: a controller for controlling an exhaust fan and a heater by comparing output values of a humidity detector and a temperature detector with a reference humidity and a reference temperature. Is equipped with the following means.

(A) When the output of the humidity detector is higher than the upper limit value R _H2 of the allowable range of the reference humidity, and the output of the temperature detector is lower than the low temperature value T _{L3 which} is lower than the allowable range of the target temperature T ₀ of the heater. Means to drive the exhaust fan when high.

(B) When the output of the humidity detector is higher than the abnormal high humidity value R _H3 and the output of the same humidity detector is the same as or larger than the previous output, the target temperature T _{0 of the} heater is set to a very small temperature. A means to raise a step.

(C) A means for stopping the exhaust fan when the output of the humidity detector is lower than the upper limit value R _H2 of the allowable range of the reference humidity, except in the case of (e) below.

(D) When the output of the humidity detector is lower than the upper limit value R _H2 of the allowable range of reference humidity, the target temperature T ₀ of the heater is the reference temperature T _0.
When it is higher than _r , the target temperature T ₀ of the heater is lowered by a small temperature step, and the exhaust fan is driven at this time.

(E) A means for lowering the target temperature T _{0 of the} heater by a small amount when the output of the humidity detector is lower than the abnormally low humidity value R _L3 and when the output is the same as or smaller than the previous output.

(F) When the humidity rises and the output of the humidity detector is higher than the lower limit value R _L2 of the allowable range of the reference humidity, and the target temperature T ₀ of the heater is lower than the reference temperature T _r , the target temperature of the heater A means to raise T ₀ by a very small temperature.

It should be noted that this apparatus can further include the following means.

(G) A means for lowering the target temperature T _{0 of the} heater by a small temperature step regardless of the output of the humidity detector when the output of the temperature detector is lower than the abnormal low temperature value T _L4 .

[Action]

In the present invention, even if the humidity in the nori drying room is higher than the reference humidity, if the humidity becomes lower than the lower limit value R _{H2 of the} high humidity, when the target temperature T ₀ of the heater is higher than the reference temperature T _r , the target temperature T _The target temperature T ₀ is lowered so that ₀ approaches the reference temperature T _r .

Even if the humidity in the nori drying room is higher than the abnormally high humidity value R _H3, if the current output of the humidity detector is lower than the previous output, it is estimated that the means to reduce the humidity was effective, and the target temperature T ₀ is not changed. .

When the target temperature T ₀ becomes higher than the reference temperature T _r , the exhaust fan is operated regardless of the output value of humidity in the nori drying room.

By performing the above operation, the increase in the target temperature T ₀ or the decrease in the target temperature when the humidity is low is suppressed as much as possible, and the humidity in the laver drying room is set to the reference humidity while giving priority to the reference temperature _Tr that is an input value by the operator. Control to be the same as R ₀ .

Such as exhausting high temperature and high humidity air at the start of drying,
In order to prevent the energy-consuming operation, the operation of the exhaust fan is stopped when the output from the temperature detector is lower than the abnormal low temperature value T _L3 . By doing this, the seaweed is dried at an early start-up at the start of drying and in stable humidity conditions.

In addition, the output from the temperature detector is set to an abnormal
When it is lower than T _H4 , the target temperature T ₀ of the heater is lowered by several degrees Celsius from the initial target temperature to prevent the humidity in the nori drying chamber from dropping too much and accelerate the synchronization to the set humidity.

〔Example〕

Hereinafter, the present invention will be specifically described with reference to Examples.

FIG. 1 is a layout diagram of a seaweed drying chamber according to the present invention, and FIG.
FIG. 3 is a block diagram showing the configuration of the processing circuit of the temperature and humidity adjusting apparatus according to the present invention, and FIG. 3 (FIGS. 3A and 3B are connected by lines corresponding to numbers in FIG. 3) of the present invention. 4 is a flowchart showing the processing of the embodiment, FIG. 4 is an explanatory view showing the relationship between the reference temperature and the control of the heater, FIG. 5 is an explanatory view showing the relationship between the set humidity and the operation of each control device, and FIG. It is a time chart which shows the state of control in the initial stage.

First, referring to FIG. 1, the equipment installed in the nori drying chamber will be described. In the figure, 1 is a seaweed drying room house, 2 is seaweed dryer, 3 is seaweed frame, 4 is an air circulation fan, 5 is a heater, 6A is a temperature detector, 6B is a humidity detector,
7 is a humidifier, 8 is an exhaust fan, 9 is an electric shutter, 10
Is a laver drying room, 11 is a temperature / humidity adjusting device, and 12 is an electric shutter limit switch.

FIG. 2 is a block diagram showing the configuration of the processing circuit. 13 is a ROM storing a processing program, 14 is a RAM for temporarily storing temperature data, humidity data, etc., 15 is a CPU for performing arithmetic processing, and 16 is a CPU. Input interface, 17 is A / D converter, 18
Is a humidity and temperature setting device, 19 is an output interface,
20 is an indicator of temperature, humidity and the like.

FIG. 3 (separated into A and B) is a flowchart showing the processing in the embodiment, but before the explanation, the relationship between the set value of temperature and humidity used in this embodiment and the target value will be described. It is shown in Table 1 and Table 2.

This relationship is shown in FIGS. 4 and 5.

Next, regarding the processing of the temperature and humidity control device according to the present invention,
Description will be given with reference to the drawings.

Step 100: The operator sets the reference temperature T _r .

Step 110: _Let the target temperature T _{0 of the} heater be the initial reference temperature T _r .

Step 120: Store the previously measured humidity output R _M1 in RAM14.

Step 130: Measured values of temperature detector 6A and humidity detector 6B T _M , R _M
Take in.

Step 140: Display the value on the display 20.

Step 150: Determine whether the measured temperature T _M is lower than the abnormal low temperature value T _L4 . If it is lower, proceed to step 180. If it is not lower, proceed to step 180.

Step 160: Determine whether the target temperature T ₀ is the same as the reference temperature T _r . If they are the same, proceed to the next step, and if they are not the same, jump to step 180.

Step 170: Lower the target temperature T ₀ by 3 ° C. below the reference temperature T _r .

Step 180: Determine whether the measured temperature T _M is lower than the abnormal high temperature value T _H4 . If it is lower, the process proceeds to the next step. If it is not lower, the heater 5 is stopped in step 210.

Step 190: Determine whether the measured temperature T _M is lower than the target temperature T ₀ . If it is lower, the process proceeds to the next step. If it is not lower, the heater 5 is stopped in step 210.

Step 200: Turn on heater 5.

Step 220: Determine whether the measured temperature T _M is higher than the low temperature value T _L3 . If it is higher, the process proceeds to the next step. If it is not higher, the exhaust fan 8 is stopped in step 260.

Step 230: Determine whether the target temperature T ₀ is higher than the reference temperature T _r . When it is higher, the exhaust fan 8 is turned on in the next step 250, and when it is not higher, the routine proceeds to step 240.

Step 240: It is judged whether the measured humidity R _M is higher than the upper limit value R _{H2 of the} allowable range. If it is higher, the exhaust fan 8 is turned on in step 250, and if it is not higher, the exhaust fan 8 is turned off in step 260.

Step 270: It is judged whether the measured humidity R _M is higher than the upper intermediate value R _H1 of the allowable range. If it is higher, the humidifier 7 is turned off in step 280, and if it is not higher, the process proceeds to step 500.

Step 290: It is judged whether or not the limit switch 12 of the electric shutter 9 indicates that the shutter is open. If the limit switch 12 is not open, the electric shutter 9 is opened in step 310. If it is open, the process proceeds to the next step.

Step 300: Judge whether the measured humidity R _M is higher than the upper limit value R _{H2 of the} allowable humidity, and if it is higher, proceed to the next step, and if not, proceed to step 390.

Step 320: Determine whether the measured humidity R _M is higher than the abnormal high humidity value R _H3 , and if it is higher, proceed to the next step, and if not, proceed to step 380.

Step 330: Determine whether the measured humidity R _M is higher than or equal to the previous measured value R _M1 , and if so, proceed to the next step, otherwise proceed to step 380.

Step 340: It is determined whether the high temperature value T _H3 is lower than the abnormal high temperature value T _{H4. If} it is low, the process proceeds to the next step. If not, the process proceeds to step 380.

Step 350: Activate the first timer.

Step 360: Determine if the first timer has counted up. If it is counting up, proceed to the next,
If not, proceed to step 440.

Step 370: Raise the target temperature T ₀ of the heater 5 by 1 ° C. and proceed to step 380.

Step 390: Determine whether the target temperature T ₀ is higher than the reference temperature T _r . If it is higher, the second timer is activated in step 400, and if it is not higher, proceed to step 380.

Step 410: Determine if the second timer has counted up. If it is counting up, proceed to the next,
If not, proceed to step 430.

Step 420: Lower the target temperature T ₀ of the heater 5 by 1 ° C. and proceed to step 380.

Step 380: Clear the first to fourth timers and return to step 120.

Step 430: Clear the first, third and fourth timers and return to step 120.

Step 440: Clear the second to fourth timers and return to step 120.

Step 500: Determine whether the measured humidity R _M is lower than the lower intermediate value R _{L1 of the} allowable range. If it is lower, the process proceeds to the next step. If it is not lower, the humidifier 7 is stopped in step 510.

Step 520: It is judged whether or not the limit switch 12 of the electric shutter 9 detects closing of the shutter. If not, the shutter 9 is closed at step 530, and if it is closed, the process proceeds to the next step.

Step 540: It is judged whether or not the measured humidity R _M is lower than the lower limit value R _{L2 of the} allowable range. If it is lower, the process proceeds to the next step. If it is not lower, the humidifier 7 is stopped in step 630.

Step 550: Turn on the humidifier 7.

Step 560: Determine whether the measured humidity R _M is lower than the abnormally low humidity value R _L3 . If it is low, proceed to the next step. If not, proceed to step 620.

Step 570: It is judged whether or not the measured humidity R _M is lower than the previous measured value R _M1 , and when it is lower, the process proceeds to the next step, and when it is not lower, the process proceeds to step 620.

Step 580: It is judged whether or not the low temperature value T _L3 is higher than the abnormal low temperature value T _L4 , and if it is higher, the process proceeds to the next step, and if not, the process proceeds to step 620.

Step 590: Activate the third timer.

Step 600: Determine if the third timer has counted up. If it is counting up, proceed to the next,
If not, proceed to step 680.

Step 610: Lower the target temperature T ₀ of the heater 5 by 1 ° C. and proceed to step 380.

Step 640: Judge whether the target temperature T ₀ is lower than the reference temperature T _r . If it is lower, the fourth timer is activated in step 650, and if it is not lower, the procedure proceeds to step 620.

Step 660: Determine if the fourth timer has counted up. If it is counting up, proceed to the next,
If not, proceed to step 690.

Step 670: Raise the target temperature T ₀ of the heater 5 by 1 ° C. and proceed to step 620.

Step 620: Clear the first to fourth timers and return to step 120.

Step 680: Clear the first, third and fourth timers and return to step 120.

Step 690: Clear the first to third timers and return to step 120.

Note that, in FIG. 3, steps surrounded by parentheses indicate auxiliary processing.

The sixth section shows how the above-mentioned processing improves at the start of drying.
Shown in the figure. In the figure, the solid line shows the case of the conventional method, the chain line shows the case where the dryer is started by the conventional humidity adjusting device, and the broken line shows the temperature detector output and the humidity detector output, respectively, in the case of the method according to the present invention. Shows. As can be seen from this figure, in the conventional humidity control device (dashed line),
Since the target temperature is raised by the high humidity output before the start of drying, there is a large drop in humidity.

〔The invention's effect〕

Since the present invention is configured as described above, it has the following effects.

(1) Since the exhaust fan is stopped and the target temperature is lowered depending on the detected temperature value, early rising at the start of drying and dry seaweed under stable humidity conditions can be performed, and high-quality dry seaweed can be produced. . Also, the heat power can be reduced and energy saving can be achieved.

(2) When the output from the temperature detector is lower than the target temperature, the target temperature of the heater should be lowered by several degrees Celsius below the initial target temperature in order to prevent the humidity in the laver drying room from dropping too much at the start of drying. Therefore, it is possible to prevent the humidity in the nori drying room from dropping too much and speed up the synchronization with the reference temperature.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a layout of a laver drying chamber equipped with the apparatus according to the present invention, FIG. 2 is a block diagram showing a configuration of a processing circuit of a temperature and humidity adjusting apparatus according to the present invention, FIG. 3A and FIG. 3B is a flow chart showing the processing of the embodiment according to the present invention, FIG. 4 is an explanatory view showing the relationship between the reference temperature and the control of the heater, and FIG. 5 shows the relationship between the set humidity and the operation of each control device. Explanatory drawing and FIG. 6 are time charts showing the state of control in the initial stage of operation. 1: Nori drying room house, 2: Nori dryer 3: Nori frame, 4: Air circulation fan 5: Heater, 6A: Temperature detector 6B: Humidity detector, 7: Humidifier 8: Exhaust fan, 9: Electric shutter 10: Nori drying room, 11: Temperature / humidity adjustment device 12: Electric shutter limit switch 13: ROM, 14: RAM 15: CPU 16: Input interface 17: A / D converter 18: Humidity and temperature setting device 19 : Output interface 20: Display

Claims (3)

[Claims] 1. A temperature detector and a humidity detector for detecting the temperature and humidity inside the nori drying chamber, an exhaust fan provided in the nori drying chamber, and a heater for controlling the temperature inside the nori drying chamber. A temperature / humidity adjusting device for a nori drying room, comprising: a controller for controlling the exhaust fan and the heater by comparing the output values of the humidity detector and the temperature detector with the reference humidity and the reference temperature. The vessel is equipped with the following means to control the temperature and humidity of the seaweed drying room. (A) When the output of the humidity detector is higher than the upper limit value R _H2 of the allowable range of the reference humidity, and the output of the temperature detector is lower than the low temperature value T _{L3 which} is lower than the allowable range of the target temperature T ₀ of the heater. Means to drive the exhaust fan when high. (B) When the output of the humidity detector is higher than the abnormal high humidity value R _H3 and the output of the same humidity detector is the same as or larger than the previous output, the target temperature T _{0 of the} heater is set to a very small temperature. A means to raise a step. (C) A means for stopping the exhaust fan when the output of the humidity detector is lower than the upper limit value R _H2 of the allowable range of the reference humidity, except in the case of (e) below. (D) When the output of the humidity detector is lower than the upper limit value R _H2 of the allowable range of reference humidity, the target temperature T ₀ of the heater is the reference temperature T _0.
When it is higher than _r , the target temperature T ₀ of the heater is lowered by a small temperature step, and the exhaust fan is driven at this time. (E) A means for lowering the target temperature T _{0 of the} heater by a small amount when the output of the humidity detector is lower than the abnormally low humidity value R _L3 and when the output is the same as or smaller than the previous output. (F) When the humidity rises and the output of the humidity detector is higher than the lower limit value R _L2 of the allowable range of the reference humidity, and the target temperature T ₀ of the heater is lower than the reference temperature T _r , the target temperature of the heater A means to raise T ₀ by a very small temperature. 2. When the output of the temperature detector is lower than the abnormal low temperature value T _{L4, a} means for lowering the target temperature T _{0 of the} heater by a small temperature step is further provided regardless of the output of the humidity detector. The temperature and humidity adjusting device for a nori drying room according to claim 1. 3. The temperature / humidity adjusting device for a seaweed drying chamber according to claim 1, wherein the controller is controlled by a microcomputer.