JPS6360985B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device attached to seaweed drying equipment,
In particular, the present invention relates to a humidity adjustment device attached to seaweed drying equipment that controls the humidity in a seaweed drying room, which constitutes the main part of the seaweed drying equipment, to be substantially constant.

[Prior art]

Drying of seaweed is carried out by placing the seaweed in a cage and transporting it along a conveyance path provided in a seaweed drying chamber that constitutes seaweed drying equipment. However, there is a close relationship between the humidity in the seaweed drying room and the quality of the seaweed; if the temperature is too low, the seaweed will become too dry and the product will crack, while if the humidity is too high, the seaweed will be insufficiently dried. Conventionally, an exhaust fan and sometimes a steam generation source were installed in the nori drying room, and while checking the drying condition of the nori, the amount of steam from the steam generation section and the exhaust fan inside the nori drying room were manually operated. The humidity inside the drying room was maintained at a constant level.

In connection with this, a device was proposed in Japanese Utility Model Publication No. 57-53196 that controlled a fan in the nori drying chamber to keep the humidity constant in the nori drying chamber.

[Problems with conventional technology]

However, when trying to control the humidity in the seaweed drying room by controlling the air volume inside the seaweed drying room, it is only possible to control the humidity within a certain range, and the control range is narrow. When the air is extremely dry, it is necessary to provide a steam generation source, and even if the internal fan is controlled as described in Japanese Utility Model Publication No. 57-53196, the overall control will be insufficient. The problem was that it required a lot of effort.

Furthermore, when the humidity is low, steam is generated to maintain a constant humidity inside the nori drying room, but in this case, generating steam requires a steam generation source, which requires a large amount of fuel or electricity. However, this can be done quite easily by slowing down the rotation of the fan, and it is extremely difficult to maintain a constant humidity in the nori drying room while minimizing the overall amount of fuel or electricity. There was a problem.

The present invention was made in view of the above circumstances, and
Automatically controls steam volume and exhaust fan displacement while reducing overall fuel and power consumption.
It is an object of the present invention to provide a humidity adjustment device attached to seaweed drying equipment that maintains the humidity in a seaweed drying room at a substantially constant level.

[Means for solving problems]

The humidity adjusting device attached to the seaweed drying equipment according to the present invention in accordance with the above object includes a seaweed drying chamber in which the seaweed is dried while transporting a cage on which the seaweed is attached, and a ventilation hole in the seaweed drying chamber. A device attached to a seaweed drying equipment, comprising a heat exchange chamber in which a heat generation source and a blower fan are arranged in communication with each other through the seaweed drying equipment. a humidity detector that measures the humidity in the drying chamber; a variable steam generation section that generates steam and sends a predetermined amount of steam into the seaweed drying equipment; It has a variable air volume exhaust fan that is installed indoors and that changes the air volume in stages, and a control device that uses the output of the humidity detector as input to adjust the air volume of the exhaust fan and the amount of steam in the steam generator. Furthermore, if the humidity in the nori drying room is higher than the standard value, the control device will first control the steam generator to gradually reduce the amount of steam, and even if the amount of steam is reduced, If the humidity in the seaweed drying room is higher than the standard value, gradually increase the speed of the exhaust fan to bring the humidity in the seaweed drying room closer to the standard value, and if the humidity in the seaweed drying room is lower than the standard value, first The exhaust fan is decelerated, and if the humidity is still lower than the standard value even after the exhaust fan is decelerated, the steam generated from the steam generating section is gradually increased to bring the humidity in the nori drying room closer to the standard value. The means are provided and configured.

Here, the heat generation source is, for example, one that has an external burner and indirectly heats the air while exchanging heat by conveying the air heated by the burner through a pipe or the like, or one that uses electric heat. say something

[Effect]

Next, the operation of the humidity adjusting device attached to the seaweed drying equipment according to the present invention will be explained.

The humidity adjustment device attached to the seaweed drying equipment of the present invention includes a humidity detector that measures the humidity inside the seaweed drying chamber, a variable steam generation section that sends a predetermined amount of steam into the seaweed drying chamber, and a steam generator that sends a predetermined amount of steam into the seaweed drying chamber. an exhaust fan that exhausts the air of In this case, first reduce the air volume of the variable air volume exhaust fan, and if the output value of the humidity detector is still lower than the standard value even after reducing the air volume, the steam from the steam generator of the variable steam volume type Increase the amount of steam to control the output value of the humidity detector so that it matches the standard value, and if the output of the humidity detector is higher than the standard value, reduce the amount of steam generated from the steam generator of the variable steam amount type, If the output value of the humidity detector is higher than the standard value even after reducing the steam from this steam generator, increase the air volume of the variable air volume exhaust fan mentioned above to adjust the output of the humidity detector and the standard value. A control device is provided in the control device to control the humidity so that the humidity in the seaweed drying chamber is approximately constant.

〔Example〕

Next, an embodiment embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a schematic plan cross-sectional view when a humidity adjustment device according to an embodiment of the present invention is attached to seaweed drying equipment, and FIG. 2 is a cross-sectional view taken along the line A-A in FIG. FIG. 3 is a block diagram of a control device used in the humidity adjustment device attached to the seaweed drying equipment according to the above embodiment, and FIG. 4 is a flowchart showing the operating state of the humidity adjustment device attached to the seaweed drying equipment according to the above embodiment. It is a chart diagram.

As shown in FIGS. 1 and 2, a seaweed drying equipment 10 equipped with a humidity adjustment device 10a according to an embodiment of the present invention has a cage 13 in which seaweed 12 is deposited horizontally up and down. 12 pieces of seaweed, passing it through the second layer
a seaweed drying chamber 14 for drying the seaweed, a variable air volume exhaust fan 11 provided on the ceiling of the seaweed drying chamber 14, a humidity detector 15 disposed within the seaweed drying chamber 14, and a humidity detector 15 disposed within the seaweed drying chamber 14; A heat exchange chamber 20 communicates with the seaweed drying chamber 14 through a ventilation port 16a, and in which a heat generation source 16, a blower fan 17, and a steam outlet 19 of a steam generation section 18 of a variable steam amount type are arranged.
and these control devices 21. Among these, a variable air volume exhaust fan 11 installed on the ceiling of the seaweed drying room 14;
The humidity detector 15 disposed in the seaweed drying chamber 14, the variable steam amount type steam generator 18, and the control device 21 constitute a humidity adjusting device 10a according to an embodiment of the present invention. There is.

These will be explained in more detail below.

The seaweed drying chamber 14 is long in the horizontal direction, and the seaweed that has been deposited on the screen 13 enters from the top through the entrance 22, and is folded back to the bottom at the left end of the seaweed drying chamber 14.
It exits from the entrance 22. Also,
A variable air volume exhaust fan 11 is installed in the seaweed drying chamber 14.
The humidity detector 15 is located approximately in the center of the
are arranged at three locations in the seaweed drying chamber 14 to measure the humidity in each part of the seaweed drying chamber 14. On the other hand, the steam generation source 18a of the steam generation section 18 is composed of, for example, a boiler, and its steam outlet is connected to the respective steam jet ports 19 through steam electromagnetic valves 23, 24, 25, and 26 connected in parallel. has been done. The areas through which the steam passes through the steam solenoid valves 23, 24, 25, and 26 have a ratio of 1:2:4:8, so that the flow rate of the steam passing therethrough is approximately in the area ratio.

Note that FIG. 1 shows a blower fan 17 and a heat generation source 1.
Although 6 is not shown, a predetermined number of blower fans 17 are provided so as to send hot air almost evenly into the seaweed drying chamber 14, and the heat generation source 16 is a metal pipe through which high-temperature exhaust gas after combustion passes. It is configured.

Next, the operation of the control means of the control device 21 that constitutes the humidity adjustment device 10a attached to the seaweed drying equipment will be explained in detail.
As shown in the figure, it is controlled by a microcomputer 27. This microcomputer 2
7 is well known, so a detailed explanation will be omitted;
(only one is shown in the diagram) and seaweed drying chamber 1
A thermometer 31 (only one is shown in the figure) for measuring the temperature of the air No. 4 is connected to a setting device 15a for setting reference values for the humidity and temperature.

On the other hand, the output port 32 of the microcomputer 27 has the steam solenoid valve 23,
24, 25, 26 are connected, and the steam solenoid valve 2
3, 24, 25, and 26 so that the amount of steam ejected from the steam outlet 19 changes in 15 steps.
An inverter 33 is connected to control the rotation speed of the exhaust fan 11, so that the rotation speed of the motor of the exhaust fan 11 can be changed in ten steps.

Then, it gives an instruction to the central processing unit 35.
Commands shown in the flowchart shown in FIG. 4 are written in the ROM 36 to control the humidity in the seaweed drying chamber 14. This will be explained in detail below.

First, the humidity adjustment device 1 attached to the seaweed drying equipment
When 0a is activated, the value of the thermometer 31 (not shown in FIGS. 1 and 2) provided in the seaweed drying chamber 14 is read (step 37), and then,
Read the output value of the humidity detector 15 (step
38), read the temperature reference value and humidity reference value (step 39). Note that the temperature reference value and humidity reference value are set in advance to the best values for drying the seaweed.

After this, an interval time (for example, 1 minute) is set, and it is confirmed that the time has elapsed (step 40), and the value of the thermometer 31 (or the average value if multiple thermometers are installed) is confirmed. Confirm that it is higher than the standard value (step 41), and then calculate the humidity standard value (Wo) - the average value of the humidity detector output (Wa).
Calculate (step 42).

Then, it is determined whether the value of (Wo-Wa-3) is negative or not (step 43), and if it is not negative, the seaweed drying chamber 14 is too dry, so whether the exhaust fan 11 is running or not. (step)
44) If the exhaust fan 11 is rotating, reduce the rotational speed of the motor 34 by one step to reduce the air volume and increase the humidity (step 45), and then return to step 37 and repeat the above steps.

On the other hand, if the exhaust fan 11 is not rotating, confirm that the steam solenoid valves 23, 24, 25, and 26 are not fully closed (step 46), and set the steam valve to 15 stages (steam solenoid valve 23 ,24,25,2
6) is increased by one step (step 47) to perform humidification, and the process returns to step 37 again.

By the way, if the value of (Wo-Wa-3) is negative in step 43, it is determined whether or not (Wo-Wa+2) is negative (step 48). here,
If the value of (Wo-Wa+2) is not negative, the humidity is within ±2% of the standard value and is good, so return to step 37 again. However, if the value of (Wo-Wa+2) is negative, Due to excessive humidity, steam valves 23, 2
4, 25, and 26 are working (step 49), and if they are working, shift down the steam valve set to 15 steps as described above (step 50) to reduce the amount of steam. Return to step 37 again.

On the other hand, if the steam solenoid valves 23, 24, 25, and 26 are all closed, check whether the exhaust fan 11 is fully open (step 51). The fan 11 is increased in speed (step 52) to quickly exhaust moisture, and the process returns to step 37. Note that if the exhaust fan 11 is fully open in step 51 and if the steam valve is fully open in step 46, the system is uncontrollable, so an alarm is issued (steps 53 and 54).

In addition, in the above process, the interval time was set to approximately 1 minute, but this was provided because it takes time for the entire system to stabilize after operating the controlled objects such as the exhaust fan or steam valve. , it is of course possible to change it depending on the responsiveness of the entire system.

Further, in the above embodiment, the exhaust amount of the exhaust fan 11 was set in 10 steps, and the amount of steam ejected was set in 15 steps, but the invention is not limited to this.

〔Effect of the invention〕

The present invention is configured as described above, and is attached to a seaweed drying equipment to automatically control the humidity within the drying equipment to a substantially constant level, thereby significantly saving labor and improving the humidity within the seaweed drying equipment. Since the humidity of the seaweed can be quickly maintained uniformly, the occurrence of defective seaweed during the seaweed drying process can be reduced.

In addition, since the seaweed is dried automatically, it can be easily linked with other seaweed processing machines, and its mechanism and structure are simple, so it can be easily integrated into existing seaweed drying equipment. Can be set.

In addition, since the control requires a heat source or an electric power source to generate steam, which is relatively expensive, this is combined with the control of the exhaust fan and is effectively controlled by the control means, so that no steam is wasted. Therefore, overall fuel and electricity costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a schematic plan cross-sectional view when a humidity adjustment device according to an embodiment of the present invention is attached to seaweed drying equipment; FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1;
FIG. 3 is a block diagram of a control device used in the humidity adjustment device attached to the seaweed drying equipment according to the above embodiment, and FIG. 4 shows the operating state of the humidity adjustment device attached to the seaweed drying equipment according to the above embodiment. It is a flowchart diagram. Explanation of symbols, 10...Seaweed drying equipment, 10a...
...Humidity adjustment device, 11...Exhaust fan, 12...
Seaweed, 13...Storage, 14...Seaweed drying room, 15...
...Ventilator, 16...Heat generation source, 17...Blower fan, 18...Steam generator, 19...Steam outlet,
20...Heat exchange chamber, 21...Control device, 23,2
4, 25, 26...Steam solenoid valve, 27...Microcomputer.

Claims (1)

[Scope of Claims] 1. A seaweed drying chamber in which the seaweed is dried while conveying a cage on which the seaweed has been deposited, and a heat generating source and an air blower connected to the seaweed drying chamber through a ventilation hole. a humidity detector installed in the seaweed drying equipment and configured to measure the humidity in the seaweed drying room; A variable steam generation section that generates steam and sends a predetermined amount of steam into the seaweed drying equipment, the amount of which can be varied in stages; It comprises an exhaust fan of variable air volume type, and a control device that uses the output of the humidity detector as input to adjust the air flow rate of the exhaust fan and the steam amount of the steam generation section. If the humidity in the drying room is higher than the standard value, first control the steam generator to gradually reduce the amount of steam, and even if the humidity in the nori drying room is still higher than the standard value, For example, the speed of the exhaust fan is gradually increased to bring the humidity in the seaweed drying room closer to the standard value, and if the humidity in the seaweed drying room is less than the standard value, the exhaust fan is first decelerated; If the humidity is still lower than the standard value, the seaweed drying equipment is provided with a control means that gradually increases the steam in the steam generating section to bring the humidity in the seaweed drying room closer to the standard value. Humidity adjustment device attached to. 2. The steam generation section includes a steam generation source that generates steam, a plurality of steam solenoid valves with different discharge amounts connected in parallel to the steam generation source, and steam connected to the steam solenoid valves connected in parallel. 2. A humidity adjusting device attached to a seaweed drying facility as set forth in claim 1, comprising a spout and an amount of steam from the steam spout being made variable by turning on and off the steam electromagnetic valve. 3. The humidity adjustment device attached to the seaweed drying equipment according to claim 2, wherein the humidity detector is disposed within the seaweed drying chamber, and the steam outlet of the steam generating section is disposed within the heat exchange chamber.