JPH11325724A - Manufacture of dried goods and controller used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always secure a uniform quality while a reduction in power consumption is contrived by drying raw materials for dried goods, by supplying warm air to a drying chamber housing the raw materials, and setting a time for blowing performed plural times at intervals for supplying ambient-temperature air by means of air blowers by stopping a radiator in the course of drying the raw materials. SOLUTION: First and second drying chambers 1 and 2 are arranged in parallel with each other and many racks on which steaming baskets 20 containing, for example, sardines which are spread all over the baskets 20 are piled upon another are arranged in rows in the chambers 1 and 2. Then first and second air blowing-in devices 9 and 10 for drying are arranged at vent ports 5a and 6b provided on one end side of the chamber 1 and the other end side of the chamber 2, so as to blow drying air (warm air) in the chambers 1 and 2 from the devices 9 and 10 in opposite directions. The sardines spread all over the baskets 20 are dried with the warm air and, at the same time, reheated with radiators 19 provided at the centers of the chambers 1 and 2. In addition, the sardines are evenly dried by setting a time for blowing performed plural times for supplying ambient-temperature air by means of air blowers.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a large-sized drying apparatus for simultaneously storing a large amount of dry matter such as fish and shellfish and fine noodles and drying efficiently and with good finish.

[0002]

2. Description of the Related Art In the manufacture of dry products, cold air drying is usually performed by blowing dry air at a temperature lower than room temperature to provide a difference in water vapor tension between the object to be dried and the cool air, thereby promoting evaporation of moisture and drying. A hot air drying method is known in which a moisture in a material to be dried is heated by hot air to evaporate to the surface, and the evaporated water is removed by blowing air. By the way, the conventional old drying method is mainly sun drying, but this method has an advantage that the finish is good without cost, and is used as a standard of the finish quality of the product dried by other methods. Sometimes. However, in this solar drying method, since the area depends on the weather and a dry place is often required to have a large area, the above two methods are currently adopted when producing dry matter such as iriko. I have.

Here, when considering the relationship between raw material moisture, time, and raw material surface temperature in a drying process such as iriko production, in the initial stage of drying, there is a process in which boiled water adhering to the raw material evaporates. Next, there is a constant-rate drying period in which the weight decreases linearly and the drying speed becomes constant. In particular, in the case of using a warm air drying room, after the constant rate drying period, a reduced rate drying period in which the diffusion amount of the internal moisture to the surface cannot follow the surface evaporation amount. In the decreasing rate drying period, the surface temperature of the raw material is gradually higher than the wet bulb temperature, the amount of heat transfer to the object to be dried is reduced, and finally, the surface temperature is equal to the dry air dry bulb temperature, and drying is performed. Stop. That is, it is said that the equilibrium relative humidity of the surface of the raw material at this time is equal to the relative humidity of the dry air.

[0004] Returning to the cold air drying method and the hot air drying method, the cold air drying method requires a refrigerator, and equipment costs and running costs are significantly higher than the hot air drying method. Therefore, in a method of inexpensively drying a large amount of seafood, for example, sardine, as a material to be dried, the hot air drying method is adopted as being economical. In this conventional method of manufacturing iriko using hot air, a sardine-containing sardine is stacked in a drying chamber, hot air is supplied from one end of the drying chamber, exhaust is performed from the other end, and drying is performed. ing. In this case, if the temperature of the hot air is low and the drying speed is low, the freshness of the raw material is reduced during drying, and if the temperature of the hot air is increased and the drying speed is increased, oxidation of lipids, deterioration of color tone, and the like occur. Also, since the commercial value is reduced, drying is performed while controlling the temperature under the condition of a constant air volume. Further, in a drying chamber configured to supply warm air from one end side, a truck having stacked layers is sequentially inserted from the upstream side (warm air supply side) of the drying chamber, and is moved downstream while drying. There is also a method of sequentially extruding the bogie from the downstream end to the outside of the drying chamber, moving it to the upstream side outside the drying chamber, pushing it again into the drying chamber, and drying again with hot air.In this method, the bogie is once pushed out of the drying chamber. At the time, the airbag is exposed to the outside air so that the raw material can be compressed (compressed).

[0005]

However, the above-mentioned conventional method has the following problems. (1) In the conventional drying room, the radiator is controlled only by the temperature sensor, and the air volume is constantly blown and dried by a constant amount. Rate-decreasing dry state, that is, it is in a dry state,
At this time, too much heat was added, which was more than the amount of water that matched the amount of water evaporation from the surface of the raw material, resulting in a slow drying rate and unnecessary power and fuel. There was a problem. (2) There is a problem that the product surface is poorly finished and the commercial value is low because excessive heat is added to the raw material of the sea cucumber that enters the reduced-rate drying state. (3) In the method of taking out the steam out of the drying room in the middle of drying and exposing it to the outside air to compress, it is very uneconomical because the warm air in the room leaks out every time the steam is taken in and out. Since a certain dolly and the dolly in the compressing process move outside in synchronization, depending on the season and weather, there is a problem that the raw material of either one may not be satisfactorily processed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the purpose thereof is to save unnecessary electric power and fuel, and to always provide uniform quality and finished products. It is an object of the present invention to provide a method for producing a dry matter which can be made favorable.

[0007]

Means for Solving the Problems (Solution 1) In order to achieve the above object, in the invention according to claim 1 of the present invention, hot air is supplied to a drying chamber containing a dry material and the dry material is heated with hot air. Drying, and drying the raw material by providing a plurality of intervals of compressing time by operating only a blower that supplies air at an outside temperature by stopping the operation of the radiator during the drying with the hot air and drying the raw material. It is characterized by.

(Solution means 2) In the invention according to claim 2,
Hot air is alternately supplied from both ends of the drying chamber into the drying chamber containing the dry material to dry the dry material with hot air, and the radiator is stopped during the hot air drying to remove air at the outside air temperature. The dry material is dried by providing the compressing time by the operation of only the supplied blower at intervals of a plurality of times.

(Solution means 3) In the invention according to claim 3,
3. The method according to claim 2, wherein the drying chamber is divided in parallel into a first drying chamber and a second drying chamber, and a drying air blowing device including a radiator and a blower is provided in the first drying chamber and the second drying chamber. At one end of the drying chamber and between the other end of the first and second drying chambers alternately move between the one end and the other end of the first and second drying chambers, respectively. It is characterized by supplying hot air or air at the outside air temperature.

(Solution means 4) In the invention according to claim 4,
The method for producing dry matter according to any one of claims 1 to 3, wherein the amount of air blown during the compressing time is controlled to be reduced.

(Solution means 5) In the invention according to claim 5,
5. The method for producing dry matter according to claim 1, wherein the surface temperature of the dry matter is substantially equal to the wet-bulb temperature of hot air supplied into the drying chamber. It is characterized in that it starts at the point of time.

(Solution means 6) In the invention according to claim 6,
The method for producing a dry matter according to any one of claims 1 to 4, wherein the dry matter of the dry matter is a moisture content of 40% to 1 in the compress performed a plurality of times before the drying is completed.
In compressing performed in the vicinity of 5%, hot air having a wet-bulb temperature of 1 ° C. to 2 ° C. lower than the surface wet-bulb temperature of the dry matter is supplied.

(Solution means 7) In the invention according to claim 7,
A control device used in the method for producing a dry matter according to any one of claims 1 to 4, wherein the temperature sensor is disposed in a drying chamber containing a dry matter material, and drying is performed by measurement of the temperature sensor. A control unit that operates the radiator and the blower for a fixed time so as to maintain the set temperature for use, and a control unit that operates only the blower for a fixed time after a lapse of the fixed time at the set temperature for drying. Features.

(Solution means 8) In the invention according to claim 8,
A control device used in the method for producing dry matter according to claim 5 or 6, wherein a temperature sensor disposed in a drying chamber containing a dry matter and a set temperature for drying is maintained by measuring the temperature sensor. A control unit for operating the radiator and the blower for a certain time, and a control unit for operating only the blower for a certain time after the lapse of the certain time at the set temperature for drying, a sensor for measuring the surface temperature of the dry matter raw material and hot air. When the surface temperature of the dry matter is substantially equal to the wet bulb temperature of the warm air by the sensor for measuring the wet bulb temperature, only the air is blown or the wet bulb temperature is 1 ° C to 2 ° C lower than the surface wet bulb temperature of the dry matter. It is characterized by having a control unit for supplying hot air.

[0015]

According to the first aspect of the present invention, during the hot air drying of the dry material, when the dry state of the dry material enters the reduced-rate drying period, a compressing time is provided to blow only the air at the outside air temperature. By repeating this step a plurality of times, the internal moisture of the dry matter can be positively diffused to the surface to promote drying. By supplying the hot air at the appropriate intervals, for example, it is possible to dry the sardine with a dried product such as sardine while keeping the surface temperature of the sardine as low as possible, thereby improving the finished product. In addition, the compress can be compressed in a short time by forced air blowing, the time until the product is finished can be shortened, and power and fuel can be saved. It should be noted that the residual heat of the radiator is diffused and disappeared in the drying chamber sequentially by blowing air, so that only the vicinity of the radiator is excessively heated and the dry matter is not damaged.

According to the second aspect of the invention, by alternately supplying warm air from both ends of the drying chamber, it is possible to uniformly dry the entirety of the air conditioner disposed in the drying chamber. In addition, hot air drying and compressing can be performed efficiently without moving the turret on a trolley, further improving the finished product and shortening the time required for the finished product, further saving power and fuel. Can do it.

[0017] According to the third aspect of the present invention, the first juxtaposed ones are provided.
At both ends of the drying chamber and the second drying chamber, a drying air blowing device including a radiator and a blower is alternately moved by a cart to supply warm air, so that even a large drying chamber can be efficiently used. The drying process is performed, and a large amount of dry matter can be produced with a good finish using a small amount of air blowing device for drying, which is very economical.

According to the fourth aspect of the present invention, the dry matter in the compress can be processed in an optimum state in accordance with the progress of the compress, and therefore, a dry matter with particularly excellent color tone can be produced. .

According to the fifth aspect of the present invention, in the drying of the dry material, evaporation is performed in the initial stage of drying so as to linearly reduce the amount of moisture therein, and the surface temperature of the dry material during that time is constant. When the surface temperature of the dried material becomes higher than the wet-bulb temperature of the warm air, evaporation is suppressed,
For this reason, the drying speed becomes slow slowly (a reduced-rate drying period). See FIG. 6: In the figure, t _WB is the wet-bulb temperature and t _WD is the dry-bulb temperature. After the constant-rate drying period, the surface temperature of the dry material can be confirmed to increase (Source: Koseisha Publishing Co., Ltd. Takaraya Yukio Fisheries Processing Machine). Therefore, the time when the surface temperature of the dry matter becomes higher than the wet-bulb temperature of the warm air is grasped, and the surface temperature of the dry matter is lowered (compressing) so that the surface of the dry matter is not heated excessively. , And when the surface temperature drops enough,
By repeating the process of performing hot air drying again, it is possible to return to the initial constant-rate drying period and perform efficient drying. The compressing is performed while the sealer is directly placed in the drying chamber. Therefore, the more times the compress is applied, the more time is wasted, the more drying efficiency is improved, and no manual operation is required. In addition, even if it is not a skilled person, the finish of the product can be improved, the heating time can be shortened, and the cost of the fuel required for heating can be reduced.

According to the sixth aspect of the invention, when the dryness of the dry matter becomes high, the dry matter absorbs the moisture in the drying chamber at the time of compressing, so that the target value of the dryness cannot be easily reached. However, by supplying air having a wet-bulb temperature 1 ° C. to 2 ° C. lower than the surface wet-bulb temperature of the dry matter during the compressing at this time, it becomes impossible to absorb moisture from the outside of the dry matter. At the same time, moisture in the body is diffused to the surface side, and subsequent drying can be promoted. The wet-bulb temperature of the air supplied during the compressing is set to the range of 1 ° C. to 2 ° C. with respect to the wet-bulb temperature of the outside air. If it is higher than that, it is difficult to obtain the effect of the compress well.

According to a seventh aspect of the present invention, there is provided a control device for use in the method for producing a dry matter, wherein the control unit for operating the radiator and the blower includes:
The drying temperature is set in advance according to the type of the dry material, and the temperature of the drying chamber is maintained at the set temperature for a certain period of time by the measurement of the temperature sensor during the hot air drying to remove the moisture of the dry material.
Further, after a lapse of a certain time, the control unit that operates only the blower blows the residual heat temperature of the radiator or the outside air temperature. At this time, the dry matter is vaporized (diffused) to the surface side of the body, so that the dry matter is in a compressed state. After this,
Repeated hot air drying and compressing again removes the water content of the dry matter as much as possible in the body and optimally drys it, thereby producing a dry matter with good color tone and good finish. Further, since it is not necessary to carry out the dry raw material to the outside of the drying chamber in order to compress the raw material, it is possible to efficiently and inexpensively produce a product of constant quality.

In the control device used in the dry matter manufacturing method according to the eighth aspect, when the dryness of the dry matter becomes high, the dry matter becomes absorbed in the drying chamber at the time of compressing, and the dry matter is dried. Although it is difficult to reach the target value of the temperature, the air having a wet-bulb temperature of 1 ° C. to 2 ° C. lower than the surface wet-bulb temperature of the dry matter is supplied during the packing at this time, so that the fuel for heating can be obtained. While minimizing costs, it makes it impossible to absorb moisture from the outside of the dry matter raw material and diffuses the moisture inside the body to the surface side, promotes subsequent drying, and economically produces a dry product with a good finish Will be able to do it.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the present embodiment, a drying apparatus for producing sardine as a raw material will be described as an example. First, the structure of the drying device will be described. 1A and 1B are cross-sectional views showing an operation state of a drying apparatus A according to an embodiment, and FIG.
Denotes a first drying chamber, and 2 denotes a second drying chamber.

The first drying chamber 1 and the second drying chamber 2 each have a frame having a length of about 15 m, a width of about 8 m, and a height of about 2 m. The partition 3 is formed in the outer shell portion 3 by providing a partition 4 in the longitudinal direction of the inner center of the inner portion 3, and has a two-row adjacent tunnel shape. 5a is one end side ventilation port of the first drying chamber, 5b is the other end side ventilation port, 6a is one end side ventilation port of the second drying chamber, 6b is the other end side ventilation port, and the one end side ventilation ports 5a, 6a And the other end side ventilation ports 5b and 6b are arranged side by side at the same location. Reference numeral 7a denotes an opening formed in the wall surface of the outer shell 3 facing the one end side ventilation ports 5a, 6a and the other end side ventilation ports 5b, 6b, and 7 denotes a door for opening and closing the opening 7a. Is pivoted to open and close in the vertical direction. Reference numeral 8a denotes a carry-in / out port provided on the left and right of one side surface of the outer shell portion 3, and reference numeral 8b denotes a carry-in / out port provided in the partition 4. Each has a sealing door 8.

Next, 9 is a first drying air blowing device,
Reference numeral 10 denotes a second drying air blowing device, which is disposed opposite to one end side ventilation port 5a of the first drying chamber 1 and the other end side ventilation port 6b of the second drying chamber 2, respectively. The first,
The second drying air blowing devices 9 and 10 include a radiator 11 using a boiler (not shown) as a heat source, and a propeller type blower 1.
2 are arranged in a large number so as to cover the ventilation holes 5a and 6b, respectively, and are fixed on the carts 13 and 13, respectively. Reference numeral 14 denotes a rail extending the trolley 13 so as to be movable between the two ventilation openings. Reference numeral 15 denotes a moving frame for connecting and moving the trolley to the trolley side while supporting a hot water supply hose and wiring from a boiler or a switchboard side as the trolley moves. It is.

A sprocket 16 is disposed on both sides of the outer shell 3 so as to cross the first and second drying chambers 1 and 2.
And a chain stretched so as to be parallel to the rails 14, the starting end and the end of which are fixed to the carriage 13. Reference numeral 18 denotes an electric motor for driving the sprocket. Reference numeral 19 denotes an auxiliary radiator fixed to an intermediate portion of the drying chamber. 20 is a movable rack for laying sardines as raw materials, and 21 is a movable rack for stacking the sardines 20 in about 20 layers. The first drying chamber 1 and the second drying chamber 2 each Row 2 columns can be stored.

Next, FIG. 3 shows the control device B. In the control device B, a hot air drying control unit 35 operates the radiator 11 and the blower 12 with a timer 36 for a certain period of time, and operates the first drying air blowing device side By measuring the temperature / humidity sensors 30a and 30b arranged substantially at the upper center and at the upper center of the second air-blower group at the side of the second drying air blowing device, the optimum temperature at which the supplied hot air is allowed for drying the raw material (set temperature) ) Is adjusted by turning on and off the steam valve 41 of the radiator. Reference numeral 37 denotes a compressing control unit for operating only the blower 12 for a set time of the timer 38 after the end of the hot air drying. Inverter 3 during this pack
9 is set to be 40% of the rotation speed. Further, in the present embodiment, the steam valve 41 is turned ON and OFF at the time of the final stage of drying, for example, at the stage when the dryness of the dry matter becomes about 40% in moisture.
Then, hot air having a wet-bulb temperature about 1 ° C. lower than the wet-bulb temperature on the sardine surface is blown. 31
Reference numerals a and 31b denote temperature sensors for measuring the surface temperature of the dry material in a non-contact manner. Reference numeral 40 denotes a replacement control unit for the first and second drying air blowing devices 9 and 10, and
The drive motors 18 and 18 of No. 3 are operated until the limit switch 33 detects them to perform the replacement. Note that timer 3
6 and 38 are appropriately changed by the timer setting unit 32.
A control unit 43 terminates the drying operation based on the sardine drying target value set in advance by the drying degree setting unit 42. The control unit 43 measures the measured values of the temperature and humidity sensors 30a and 30b and the measured values of the temperature sensors 31a and 31b. Is processed by a sequencer to find the time when the set value is reached,
It controls the work stop. For example, when the sardine has a moisture finish of 15%, the temperature and humidity sensor 30 is set.
The point at which the dry bulb temperature at a relative humidity of 15% measured by the measurements a and 30b becomes equal to the sardine surface temperature measured by the temperature sensors 31a and 31b is the stop point.

Next, the operation will be described. The first drying chamber 1 and the second drying chamber 2 are arranged so as to be parallel. First, as an initial state, a rack in which sardines are spread in the first and second drying chambers 1 and 2 is stacked. The first drying air blowing device 9 is arranged in one side ventilation port 5a arranged side by side, and the second drying air blowing device 9 is arranged in the other side ventilation port 6b arranged side by side. It has been arranged. Then, the first and second drying air blowing devices 9 and 10 are operated by the first and second drying air blowing devices 9 and 10 respectively.
Hot air is blown into each of the second drying chambers 1 and 2 as drying air so as not to face the second drying chambers 1 and 2 from different directions. At this time, the hot air is sequentially blown while being in contact with the sardines in the sardine and dried, and further heated by the radiator 19 on the way and moved while further drying the sardines. Through the opening 7a, the air is exhausted to the atmosphere behind the opening 7a. During the hot-air drying, the hot-air drying control unit 35 controls the opening and closing of the steam valve 41, so that the inside of the drying chamber is always maintained at a constant temperature. After a certain time of the hot air drying, the drying by the hot air is stopped,
Compressing is performed by blowing in only outside air. In this case, the ventilation is reduced to 40%. After performing the hot-air drying and compressing, the first and second drying air blowing devices 9,
10 moves to the adjacent ventilation port in synchronization with the instruction, and again performs drying by blowing in the hot air and compressing after stopping the hot air. In this drying step, the temperature sensors 31a, 31b
Measures the surface temperature of the sardine and uses it to detect changes from the constant-rate drying period to the reduced-rate drying period, that is, to adjust the starting point for compressing, the temperature of hot air, and the supply time.

FIG. 4 is a flow chart of the production of the rice wrapper incorporating the compressing step. First, the air conditioner is set in a drying chamber (S1), and the first and second drying air blowing devices 9 and 10 operate the radiator and the blower as shown in FIG. Supply (S2). In this case, the blower blows the air at full speed, and the radiator is ON / OFF controlled so that the room temperature is kept constant by the measurement of the temperature sensor. At this time, the sardines are dried at a constant rate and become freshly dried. After the completion of the supply of the warm air, the air having the outside air temperature is supplied for a certain period of time by the transfer air only 40% of the blower by the inverter, and the sardine surface is forcibly cooled (S3). At this time, compressing is performed, and the water in the sardine evaporates to the surface. At this time, in the early stage of the air blowing, there is residual heat of the radiator and air blowing at a temperature higher than the outside air temperature
Since it is possible to prevent the residual heat from acting only on the sardines near the radiator, the sardines are not damaged and the residual heat can be effectively used. After the completion of the compressing, the replacement of the air blowing device for drying is performed as shown in FIG.
4). Thereafter, the same steps (S2) and (S3) are performed (S5) and (S6), and the drying air blowing device is replaced again within the set time of approximately 24 hours (S7) (S8). The above operation is regarded as one cycle, and the process returns to step (S2), and the same operation as described above is repeated. In the final stage of compressing (from about 8 hours before the end of the drying step to the end), hot air having a wet bulb temperature lower by about 1 ° C. than the wet bulb temperature on the sardine surface is supplied (S3), (S3).
6) During the final step, the wet bulb temperature on the sardine surface becomes the same as the dry bulb temperature, and the target value for drying is achieved (S7). Is finished and the product is unloaded (S9). By the above-mentioned operations, it is possible to automatically and continuously produce a desired quality product.

FIG. 5 shows the result of the operation performed in the experimental apparatus according to the flowchart. Implementation conditions: Fan air flow 46500 m ³ / h (rated static pressure 2
5mmH ₂ O), same as above, wind speed 7m / sec, radiator calorific value 88760kcal, sardine raw material 1090kg, (S
2), (S5) timer setting time = 5 minutes, (S3),
The timer setting time of (S6) was set to 9 minutes and 30 seconds, and the drying room set temperature = outside air temperature + 8 ° C.

As described above, in the present embodiment, since the compressing time is taken during the drying with hot air, the surface of the sardine is not damaged, the surface is glossy, and the sashimi is dried from the center. It was possible to obtain riko with a waist and high commercial value. Since the pack is kept in the drying room and compressed, the time required to remove the extract from the room can be saved,
The whole amount can be finished evenly. The surplus heat blown by the inverter control allows the radiator to be stopped earlier, saving fuel used for the radiator (heat exchanger) and greatly reducing power consumption, as much as possible heat is expected.

Although the embodiment has been described above, the specific configuration of the present invention is not limited to the present embodiment, and even if there is a design change or the like without departing from the gist of the invention. Included in the invention.

The air volume of the blower, ON / OFF control of the radiator, cycle time, etc. can be automatically changed as appropriate according to the drying state. The structure of the air blowing device for drying, the structure in the drying chamber, the state of stacking of the blue color, the support of the dry material other than the blue color, and the like can be arbitrarily set. Although the drying step is performed for 24 hours, the setting of the working time and the number of times of compressing can be arbitrarily set depending on the dry material.
Examples of dry matter include fish and shellfish other than sardines and noodles such as noodles.

[0034]

As described above, in the method for producing dry matter according to the first aspect of the present invention, since the above-mentioned method is adopted, the dry matter of the dry matter is compressed when the dry state of the raw material enters the reduced-rate drying period. The surface of the dry matter is forcibly cooled by blowing air only at the temperature of the outside air with a certain time, so that the internal moisture of the dry matter can be positively diffused to the surface to promote the drying. By alternately performing hot air drying and compressing,
Since the drying can be performed while the surface temperature of the dry matter is not raised as much as possible, the finished product can be improved. Further, it is possible to further shorten the time until the product is finished, and to obtain effects such as saving power and fuel.

In the method for producing dry matter according to the second aspect, since the above method is employed, hot air is alternately supplied from both ends of the drying chamber so that the entire dry matter raw material disposed in the drying chamber is evenly distributed. It can be dried. In addition, hot air drying in the drying room without moving the dry material
Compressing can be performed efficiently, and the effects of improving the finish of the product, shortening the time until the finish of the product, and further saving power and fuel can be obtained.

In the method for producing a dry matter according to the third aspect, the drying air blowing devices are alternately moved by a cart at both ends of the first drying chamber and the second drying chamber, which are arranged side by side, so that the temperature is increased. Since air is supplied, the drying process can be performed efficiently even in a large drying room, and a large amount of dry matter can be manufactured with a small amount of dry air blowing equipment, and equipment costs can be reduced. Is obtained.

In the method for producing dry matter according to the fourth aspect, the dry matter in the compress can be treated in an optimal state in accordance with the progress of the compress, and therefore, the color tone is particularly excellent, and There are obtained effects such as excellent storage stability and the production of a dried product having high commercial value.

In the method for producing dry matter according to the fifth aspect, when the surface temperature of the dry matter becomes higher than the wet-bulb temperature of the hot air, the surface temperature of the dry matter is lowered (pack). Above), the surface of the dry material is not heated excessively, and when the surface temperature is sufficiently lowered, the process of performing hot air drying again is repeated, thereby returning to the initial constant-rate drying period state and efficiently. Drying can be performed. The compressing is performed while the sealer is directly placed in the drying chamber. Therefore, the more times the compress is applied, the more time is wasted, the more drying efficiency is improved, and no manual operation is required. In addition, even if it is not a skilled person, the finish of the product can be improved, the heating time can be shortened, and the cost of the fuel required for heating can be reduced.

In the method for producing dry matter according to the sixth aspect, when the dry matter of the dry matter becomes high, the dry matter absorbs moisture in the drying chamber at the time of compressing, and the dry matter becomes dry. Although it will not be easily reached the target value, by the warm air to test feed having 2 ℃ lower wet bulb temperature to no 1 ℃ to the surface wet bulb dry matter feed during罨上this point, the dry matter material Conversely, it is possible to prevent the absorption of moisture from the outside and to diffuse the moisture in the body to the surface side, thereby facilitating the subsequent drying.

According to a seventh aspect of the present invention, there is provided a controller for use in the method for producing a dry matter, wherein a drying temperature is set in advance according to a type of dry matter raw material, and the temperature in the drying chamber is measured by a temperature sensor during hot air drying. After removing the moisture of the dry matter by keeping it for a certain period of time, and then operating only the blower to blow the dry matter at the residual heat temperature of the radiator or the outside air temperature, compress the dry matter in the drying chamber. Become. By repeating the drying and the compressing in the drying chamber, moisture in the body of the dry material is removed as much as possible and the material is dried optimally, and a dry product having a good color tone and a good finish can be manufactured. In addition, since it is not necessary to carry out the dry matter raw material outside the drying chamber in order to compress the dry matter, it is possible to obtain an effect such that a product of constant quality can be efficiently manufactured at low cost.

In the control device used in the method for producing dry matter according to the eighth aspect, when the dryness of the dry matter becomes high, the dry matter becomes absorbed in the drying chamber at the time of compressing, and the dry matter becomes dry. Although it is difficult to reach the target value of the temperature, the hot air having a wet-bulb temperature of 1 ° C. to 2 ° C. lower than the surface wet-bulb temperature of the dry matter is supplied during the compressing at this time, so that While minimizing the cost of fuel, it makes it impossible to absorb moisture from the outside of the dry matter and diffuses moisture inside the body to the surface side, promoting subsequent drying, and economically producing a dry product with a good finish. It can be manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an operation state of an apparatus for manufacturing an apparatus according to an embodiment of the present invention in the order of (a) and (b).

FIG. 2 is a vertical cross-sectional view showing an apparatus for manufacturing the first embodiment of the present invention.

FIG. 3 is a block diagram illustrating a control device according to the embodiment;

FIG. 4 is a flowchart illustrating a method for manufacturing a dry matter according to the embodiment.

FIG. 5 is an explanatory diagram showing test results of the manufacturing method according to the embodiment and a conventional method.

FIG. 6 is an explanatory diagram showing changes in moisture and surface temperature during a drying process.

[Explanation of symbols]

 A Aikoko production apparatus 1 First drying room 2 Second drying room 4 Partition 5a One end side ventilation opening of the first drying room 5b The other end side ventilation opening 6a of the first drying room 6a One end side ventilation opening 6b of the second drying room 2 Ventilation port at the other end of the drying chamber 9 First air blowing device for drying 10 Second air blowing device for drying 11 Radiator 12 Propeller type blower 13 Bogie 30a, 30b Temperature / humidity sensor 31a, 31b Sensor for measuring sardine surface temperature 35 Hot air drying control unit 37 Compression control unit 39 Inverter 40 Replacement control unit of air blowing device for drying 41 Valve of radiator

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 12, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Method for producing dry matter and control device used therefor

[Claims]

[0001]

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a large-sized drying apparatus for simultaneously storing a large amount of dry matter such as fish and shellfish and fine noodles and drying efficiently and with good finish.

[0002]

2. Description of the Related Art In the manufacture of dry products, cold air drying is usually performed by blowing dry air at a temperature lower than room temperature to provide a difference in water vapor tension between the object to be dried and the cool air, thereby promoting evaporation of moisture and drying. A hot air drying method is known in which a moisture in a material to be dried is heated by hot air to evaporate to the surface, and the evaporated water is removed by blowing air. By the way, the conventional old drying method is mainly sun drying, but this method has an advantage that the finish is good without cost, and is used as a standard of the finish quality of the product dried by other methods. Sometimes. However, in this solar drying method, since the area depends on the weather and a dry place is often required to have a large area, the above two methods are currently adopted when producing dry matter such as iriko. I have.

Here, when considering the relationship between raw material moisture, time, and raw material surface temperature in a drying process such as iriko production, in the initial stage of drying, there is a process in which boiled water adhering to the raw material evaporates. Next, there is a constant-rate drying period in which the weight decreases linearly and the drying speed becomes constant. In particular, in the case of using a warm air drying room, after the constant rate drying period, a reduced rate drying period in which the diffusion amount of the internal moisture to the surface cannot follow the surface evaporation amount. In the decreasing rate drying period, the surface temperature of the raw material is gradually higher than the wet bulb temperature, the amount of heat transfer to the object to be dried is reduced, and finally, the surface temperature is equal to the dry air dry bulb temperature, and drying is performed. Stop. That is, it is said that the equilibrium relative humidity of the surface of the raw material at this time is equal to the relative humidity of the dry air.

[0004] Returning to the cold air drying method and the hot air drying method, the cold air drying method requires a refrigerator, and equipment costs and running costs are significantly higher than the hot air drying method. Therefore, in a method of inexpensively drying a large amount of seafood, for example, sardine, as a material to be dried, the hot air drying method is adopted as being economical. In this conventional method of manufacturing iriko using hot air, a sardine-containing sardine is stacked in a drying chamber, hot air is supplied from one end of the drying chamber, exhaust is performed from the other end, and drying is performed. ing. In this case, if the temperature of the hot air is low and the drying speed is low, the freshness of the raw material is reduced during drying, and if the temperature of the hot air is increased and the drying speed is increased, oxidation of lipids, deterioration of color tone, and the like occur. Also, since the commercial value is reduced, drying is performed while controlling the temperature under the condition of a constant air volume. Further, in a drying chamber configured to supply warm air from one end side, a truck having stacked layers is sequentially inserted from the upstream side (warm air supply side) of the drying chamber, and is moved downstream while drying. There is also a method of sequentially extruding the bogie from the downstream end to the outside of the drying chamber, moving it to the upstream side outside the drying chamber, pushing it again into the drying chamber, and drying again with hot air.In this method, the bogie is once pushed out of the drying chamber. At the time, the airbag is exposed to the outside air so that the raw material can be compressed (compressed).

[0005]

However, the above-mentioned conventional method has the following problems. (1) In the conventional drying room, the radiator is controlled only by the temperature sensor, and the air volume is constantly blown and dried by a constant amount. Rate-decreasing dry state, that is, it is in a dry state,
At this time, too much heat was added, which was more than the amount of water that matched the amount of water evaporation from the surface of the raw material, resulting in a slow drying rate and unnecessary power and fuel. There was a problem. (2) There is a problem that the product surface is poorly finished and the commercial value is low because excessive heat is added to the raw material of the sea cucumber that enters the reduced-rate drying state. (3) In the method of taking out the steam out of the drying room in the middle of drying and exposing it to the outside air to compress, it is very uneconomical because the warm air in the room leaks out every time the steam is taken in and out. Since a certain dolly and the dolly in the compressing process move outside in synchronization, depending on the season and weather, there is a problem that the raw material of either one may not be satisfactorily processed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the purpose thereof is to save unnecessary electric power and fuel, and to always provide uniform quality and finished products. It is an object of the present invention to provide a method for producing a dry matter which can be made favorable.

[0007]

Means for Solving the Problems (Solution 1) In order to achieve the above object, the invention according to claim 1 of the present invention uses a dry matter
Hot air is supplied to the drying chamber containing the raw material to
Dry with hot air, and stop radiator operation during the hot air drying.
Only the blower that stops and supplies air at the outside temperature
By setting the compress time several times at intervals,
In the method for producing a dry matter for drying a raw material,
It characterized the this <br/> to reduce control over air volume during the air blowing amount warm air supply during.

(Solution means 2) In the invention according to claim 2,
The dry matter is supplied by supplying warm air into the drying chamber containing the dry matter.
The raw material is dried with hot air, and a radiator is
Operation of only the blower that stops the operation and supplies air at the outside air temperature
By setting the time for compressing by moving several times at intervals
A method for producing a dry matter, wherein the dry matter is dried.
The surface temperature of the dry material is the temperature supplied to the drying room.
It is characterized in that it is started at a time when the temperature is substantially equal to the wet bulb temperature of the wind .

(Solution means 3) In the invention according to claim 3,
The method for producing a dry matter according to claim 1 or 2.
Of the compress to be performed multiple times before the end of drying
When the dryness of the ingredients is 40% to 15% moisture
1 ° C below the surface wet bulb temperature of dry matter
Supply hot air with a wet bulb temperature of
Features .

(Solution means 4) In the invention according to claim 4,
Use in the method for producing a dry matter according to claim 1 or 2.
The control device that controls the
The temperature sensor to be placed and the temperature sensor
Heat radiator and feed for a certain time to maintain the set temperature for drying.
A control unit for operating the blower, and at the set temperature for drying
A system that activates only the blower for a certain time after a certain time has elapsed
And a control unit.

(Solution means 5) In the invention according to claim 5,
The dry product according to any one of claims 1 to 3.
In the control device used in the method of manufacturing
A temperature sensor arranged in the housed drying chamber;
Constant to maintain the set temperature for drying by sensor measurement
Control unit to operate the time radiator and blower, and
After a certain period of time at the set temperature for drying, a blower for a certain period
Control unit that activates only and measurement of surface temperature of dry matter
Dry matter source by sensor and sensor measuring hot air wet bulb temperature
When the surface temperature of the material becomes approximately equal to the wet-bulb temperature of the hot air
Blow only or 1 ℃ or less from surface wet bulb temperature of dry matter
Equipped with a control unit for supplying hot air with a wet bulb temperature of 2 ° C lower
It is characterized by having.

[0012]

According to the first aspect of the present invention, the dry matter in the compress can be processed in an optimum state in accordance with the progress of the compress, and therefore, a dry matter having particularly excellent color tone can be produced. .

According to the second aspect of the present invention, in the drying of the dry material, evaporation is performed in the initial stage of drying so as to linearly reduce the amount of moisture therein, and the surface temperature of the dry material during that time is constant. When the surface temperature of the dried material becomes higher than the wet-bulb temperature of the warm air, evaporation is suppressed,
For this reason, the drying speed becomes slow slowly (a reduced-rate drying period). See Figure 6: tW · B is the wet-bulb temperature and tWD is the dry-bulb temperature in the figure, and the surface temperature of the dry matter can be confirmed to increase after the constant-rate drying period. (Source: Yukio Takatani, published by Koseisha Koseikaku Shuppan) Fish processing machinery). Therefore, the time when the surface temperature of the dry matter becomes higher than the wet-bulb temperature of the warm air is grasped, and the surface temperature of the dry matter is lowered (compressing) so that the surface of the dry matter is not heated excessively. , And when the surface temperature drops enough,
By repeating the process of performing hot air drying again, it is possible to return to the initial constant-rate drying period and perform efficient drying. The compressing is performed while the sealer is directly placed in the drying chamber. Therefore, the more times the compress is applied, the more time is wasted, the more drying efficiency is improved, and no manual operation is required. In addition, even if it is not a skilled person, the finish of the product can be improved, the heating time can be shortened, and the cost of the fuel required for heating can be reduced.

According to the third aspect of the present invention, when the dryness of the dry matter is high, the dry matter is absorbed in the drying chamber at the time of compressing, and the target value of the dryness cannot be easily reached. However, by supplying air having a wet-bulb temperature 1 ° C. to 2 ° C. lower than the surface wet-bulb temperature of the dry matter during the compressing at this time, it becomes impossible to absorb moisture from the outside of the dry matter. At the same time, moisture in the body is diffused to the surface side, and subsequent drying can be promoted. The wet-bulb temperature of the air supplied during the compressing is set to the range of 1 ° C. to 2 ° C. with respect to the wet-bulb temperature of the outside air. If it is higher than that, it is difficult to obtain the effect of the compress well.

According to a fourth aspect of the present invention, there is provided a control device used in the method for producing a dry matter, wherein the control unit for operating the radiator and the blower includes:
The drying temperature is set in advance according to the type of the dry material, and the temperature of the drying chamber is maintained at the set temperature for a certain period of time by the measurement of the temperature sensor during the hot air drying to remove the moisture of the dry material.
Further, after a lapse of a certain time, the control unit that operates only the blower blows the residual heat temperature of the radiator or the outside air temperature. At this time, the dry matter is vaporized (diffused) to the surface side of the body, so that the dry matter is in a compressed state. After this,
Repeated hot air drying and compressing again removes the water content of the dry matter as much as possible in the body and optimally drys it, thereby producing a dry matter with good color tone and good finish. Further, since it is not necessary to carry out the dry raw material to the outside of the drying chamber in order to compress the raw material, it is possible to efficiently and inexpensively produce a product of constant quality.

In the control apparatus used in the method for producing dry matter according to the fifth aspect, when the dryness of the dry matter is high, the dry matter is absorbed in the drying chamber at the time of compressing, so that the dry matter is absorbed. Although it is difficult to reach the target value of the temperature, the air having a wet-bulb temperature of 1 ° C. to 2 ° C. lower than the surface wet-bulb temperature of the dry matter is supplied during the packing at this time, so that the fuel for heating can be obtained. While minimizing costs, it makes it impossible to absorb moisture from the outside of the dry matter raw material and diffuses the moisture inside the body to the surface side, promotes subsequent drying, and economically produces a dry product with a good finish Will be able to do it.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the present embodiment, a drying apparatus for producing sardine as a raw material will be described as an example. First, the structure of the drying device will be described. 1A and 1B are cross-sectional views showing an operation state of a drying apparatus A according to an embodiment, and FIG.
Denotes a first drying chamber, and 2 denotes a second drying chamber.

The first drying chamber 1 and the second drying chamber 2 each have a frame having a length of about 15 m, a width of about 8 m, and a height of about 2 m. The partition 3 is formed in the outer shell portion 3 by providing a partition 4 in the longitudinal direction of the inner center of the inner portion 3, and has a two-row adjacent tunnel shape. 5a is one end side ventilation port of the first drying chamber, 5b is the other end side ventilation port, 6a is one end side ventilation port of the second drying chamber, 6b is the other end side ventilation port, and the one end side ventilation ports 5a, 6a And the other end side ventilation ports 5b and 6b are arranged side by side at the same location. Reference numeral 7a denotes an opening formed in the wall surface of the outer shell 3 facing the one end side ventilation ports 5a, 6a and the other end side ventilation ports 5b, 6b, and 7 denotes a door for opening and closing the opening 7a. Is pivoted to open and close in the vertical direction. Reference numeral 8a denotes a carry-in / out port provided on the left and right of one side surface of the outer shell portion 3, and reference numeral 8b denotes a carry-in / out port provided in the partition 4. Each has a sealing door 8.

Next, 9 is a first drying air blowing device,
Reference numeral 10 denotes a second drying air blowing device, which is disposed opposite to one end side ventilation port 5a of the first drying chamber 1 and the other end side ventilation port 6b of the second drying chamber 2, respectively. The first,
The second drying air blowing devices 9 and 10 include a radiator 11 using a boiler (not shown) as a heat source, and a propeller type blower 1.
2 are arranged in a large number so as to cover the ventilation holes 5a and 6b, respectively, and are fixed on the carts 13 and 13, respectively. Reference numeral 14 denotes a rail extending the trolley 13 so as to be movable between the two ventilation openings. Reference numeral 15 denotes a moving frame for connecting and moving the trolley to the trolley side while supporting a hot water supply hose and wiring from a boiler or a switchboard side as the trolley moves. It is.

A sprocket 17 is disposed on both sides of the outer shell 3 so as to cross the first and second drying chambers 1 and 2.
And a chain stretched so as to be parallel to the rails 14, the starting end and the end of which are fixed to the carriage 13. Reference numeral 18 denotes an electric motor for driving the sprocket. Reference numeral 19 denotes an auxiliary radiator fixed to an intermediate portion of the drying chamber. 20 is a movable rack for laying sardines as raw materials, and 21 is a movable rack for stacking the sardines 20 in about 20 layers. The first drying chamber 1 and the second drying chamber 2 each Row 2 columns can be stored.

FIG. 3 shows a control device B. In the control device B, a hot air drying control unit 35 operates the radiator 11 and the blower 12 with a timer 36 for a certain period of time, and operates the first drying air blowing device side By measuring the temperature / humidity sensors 30a and 30b arranged substantially at the upper center and at the upper center of the second air-blower group at the side of the second drying air blowing device, the optimum temperature at which the supplied hot air is allowed for drying the raw material (set temperature) ) Is adjusted by turning on and off the steam valve 41 of the radiator. Reference numeral 37 denotes a compressing control unit for operating only the blower 12 for a set time of the timer 38 after the end of the hot air drying. Inverter 3 during this pack
9 is set to be 40% of the rotation speed. Further, in the present embodiment, the steam valve 41 is turned ON and OFF at the time of the final stage of drying, for example, at the stage when the dryness of the dry matter becomes about 40% in moisture.
Then, hot air having a wet-bulb temperature about 1 ° C. lower than the wet-bulb temperature on the sardine surface is blown. 31
Reference numerals a and 31b denote temperature sensors for measuring the surface temperature of the dry material in a non-contact manner. Reference numeral 40 denotes a replacement control unit for the first and second drying air blowing devices 9 and 10, and
The drive motors 18 and 18 of No. 3 are operated until the limit switch 33 detects them to perform the replacement. Note that timer 3
6 and 38 are appropriately changed by the timer setting unit 32.
A control unit 43 terminates the drying operation based on the sardine drying target value set in advance by the drying degree setting unit 42. The control unit 43 measures the measured values of the temperature and humidity sensors 30a and 30b and the measured values of the temperature sensors 31a and 31b. Is processed by a sequencer to find the time when the set value is reached,
It controls the work stop. For example, when the sardine has a moisture finish of 15%, the temperature and humidity sensor 30 is set.
The point at which the dry bulb temperature at a relative humidity of 15% measured by the measurements a and 30b becomes equal to the sardine surface temperature measured by the temperature sensors 31a and 31b is the stop point.

Next, the operation will be described. The first drying chamber 1 and the second drying chamber 2 are arranged so as to be parallel. First, as an initial state, a rack in which sardines are spread in the first and second drying chambers 1 and 2 is stacked. The first drying air blowing device 9 is arranged in one side ventilation port 5a arranged side by side, and the second drying air blowing device 9 is arranged in the other side ventilation port 6b arranged side by side. It has been arranged. Then, the first and second drying air blowing devices 9 and 10 are operated by the first and second drying air blowing devices 9 and 10 respectively.
Hot air is blown into each of the second drying chambers 1 and 2 as drying air so as not to face the second drying chambers 1 and 2 from different directions. At this time, the hot air is sequentially blown while being in contact with the sardines in the sardine and dried, and further heated by the radiator 19 on the way and moved while further drying the sardines. Through the opening 7a, the air is exhausted to the atmosphere behind the opening 7a. During the hot-air drying, the hot-air drying control unit 35 controls the opening and closing of the steam valve 41, so that the inside of the drying chamber is always maintained at a constant temperature. After a certain time of the hot air drying, the drying by the hot air is stopped,
Compressing is performed by blowing in only outside air. In this case, the ventilation is reduced to 40%. After performing the hot-air drying and compressing, the first and second drying air blowing devices 9,
10 moves to the adjacent ventilation port in synchronization with the instruction, and again performs drying by blowing in the hot air and compressing after stopping the hot air. In this drying step, the temperature sensors 31a, 31b
Measures the surface temperature of the sardine and uses it to detect changes from the constant-rate drying period to the reduced-rate drying period, that is, to adjust the starting point for compressing, the temperature of hot air, and the supply time.

FIG. 4 is a flow chart of the production of the rice wrapper incorporating the compressing step. First, the air conditioner is set in a drying chamber (S1), and the first and second drying air blowing devices 9 and 10 operate the radiator and the blower as shown in FIG. Supply (S2). In this case, the blower blows the air at full speed, and the radiator is ON / OFF controlled so that the room temperature is kept constant by the measurement of the temperature sensor. At this time, the sardines are dried at a constant rate and become freshly dried. After the completion of the supply of the warm air, the air having the outside air temperature is supplied for a certain period of time by the transfer air only 40% of the blower by the inverter, and the sardine surface is forcibly cooled (S3). At this time, compressing is performed, and the water in the sardine evaporates to the surface. At this time, in the early stage of the air blowing, there is residual heat of the radiator and air blowing at a temperature higher than the outside air temperature
Since it is possible to prevent the residual heat from acting only on the sardines near the radiator, the sardines are not damaged and the residual heat can be effectively used. After the completion of the compressing, the replacement of the air blowing device for drying is performed as shown in FIG.
4). Thereafter, the same steps (S2) and (S3) are performed (S5) and (S6), and the drying air blowing device is replaced again within the set time of approximately 24 hours (S7) (S8). The above operation is regarded as one cycle, and the process returns to step (S2), and the same operation as described above is repeated. In the final stage of compressing (from about 8 hours before the end of the drying step to the end), hot air having a wet bulb temperature lower by about 1 ° C. than the wet bulb temperature on the sardine surface is supplied (S3), (S3).
6) During the final step, the wet bulb temperature on the sardine surface becomes the same as the dry bulb temperature, and the target value for drying is achieved (S7). Is finished and the product is unloaded (S9). By the above-mentioned operations, it is possible to automatically and continuously produce a desired quality product.

FIG. 5 shows the results of the operation performed in the experimental apparatus according to the flowchart. Implementation conditions: Fan air volume 46500 m3 / h (Rated static pressure 2
5 mmH2O), same as above, wind speed 7 m / sec, radiator calorific value 88760 kcal, sardine raw material 1090 kg, (S
2), (S5) timer setting time = 5 minutes, (S3),
The timer setting time of (S6) was set to 9 minutes and 30 seconds, and the drying room set temperature = outside air temperature + 8 ° C.

As described above, in this embodiment, since the compressing time is taken in during the drying with hot air, the surface of the sardine is not damaged, the surface is glossy, and the sashimi is dried from the center. It was possible to obtain riko with a waist and high commercial value. Since the pack is kept in the drying room and compressed, the time required to remove the extract from the room can be saved,
The whole amount can be finished evenly. The surplus heat blown by the inverter control allows the radiator to be stopped earlier, saving fuel used for the radiator (heat exchanger) and greatly reducing power consumption, as much as possible heat is expected.

Although the embodiments have been described above, the specific configuration of the present invention is not limited to the embodiments, and even if there is a design change within a range not departing from the gist of the invention, the present invention is not limited to the embodiments. Included in the invention.

The air volume of the blower, ON / OFF control of the radiator, cycle time, etc. can be automatically changed as appropriate according to the drying state. The structure of the air blowing device for drying, the structure in the drying chamber, the state of stacking of the blue color, the support of the dry material other than the blue color, and the like can be arbitrarily set. Although the drying step is performed for 24 hours, the setting of the working time and the number of times of compressing can be arbitrarily set depending on the dry material.
Examples of dry matter include fish and shellfish other than sardines and noodles such as noodles.

[0028]

As described above, in the method for producing dry matter according to the first aspect of the present invention, since the above method is employed, the dry matter in the compress is optimally adjusted according to the progress of the compress. It can be processed in a state, and therefore, effects such as excellent color tone, stiffness, excellent storability, and production of a dry product with high commercial value can be obtained.

In the method for producing dry matter according to the second aspect, the time when the surface temperature of the dry matter becomes higher than the wet bulb temperature of the warm air is grasped, and the surface temperature of the dry matter is lowered (pack). Above), the surface of the dry material is not heated excessively, and when the surface temperature is sufficiently lowered, the process of performing hot air drying again is repeated, thereby returning to the initial constant-rate drying period state and efficiently. Drying can be performed. The compressing is performed while the sealer is directly placed in the drying chamber. Therefore, the more times the compress is applied, the more time is wasted, the more drying efficiency is improved, and no manual operation is required. In addition, even if it is not a skilled person, the finish of the product can be improved, the heating time can be shortened, and the cost of the fuel required for heating can be reduced.

In the method for producing dry matter according to the third aspect, when the dry matter of the dry matter becomes high, the dry matter becomes absorbed in the drying chamber at the time of compressing, so that the dry matter becomes dry. Although it will not be easily reached the target value, by the warm air to test feed having 2 ℃ lower wet bulb temperature to no 1 ℃ to the surface wet bulb dry matter feed during罨上this point, the dry matter material Conversely, it is possible to prevent the absorption of moisture from the outside and to diffuse the moisture in the body to the surface side, thereby facilitating the subsequent drying.

According to a fourth aspect of the present invention, there is provided a controller for use in the method for producing a dry matter, wherein a drying temperature is previously set according to a kind of the dry matter raw material, and the temperature in the drying chamber is measured by a temperature sensor during hot air drying. After removing the moisture of the dry matter by keeping it for a certain period of time, and then operating only the blower to blow the dry matter at the residual heat temperature of the radiator or the outside air temperature, compress the dry matter in the drying chamber. Become. By repeating the drying and the compressing in the drying chamber, moisture in the body of the dry material is removed as much as possible and the material is dried optimally, and a dry product having a good color tone and a good finish can be manufactured. In addition, since it is not necessary to carry out the dry matter raw material outside the drying chamber in order to compress the dry matter, it is possible to obtain an effect such that a product of constant quality can be efficiently manufactured at low cost.

In the control device used in the method for producing dry matter according to the fifth aspect, when the dryness of the dry matter becomes high, the dry matter becomes absorbed in the drying chamber at the time of compressing, and the dry matter is dried. Although it is difficult to reach the target value of the temperature, the hot air having a wet-bulb temperature of 1 ° C. to 2 ° C. lower than the surface wet-bulb temperature of the dry matter is supplied during the compressing at this time, so that While minimizing the cost of fuel, it makes it impossible to absorb moisture from the outside of the dry matter and diffuses moisture inside the body to the surface side, promoting subsequent drying, and economically producing a dry product with a good finish. It can be manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an operation state of an apparatus for manufacturing an apparatus according to an embodiment of the present invention in the order of (a) and (b).

FIG. 2 is a vertical cross-sectional view showing an apparatus for manufacturing the first embodiment of the present invention.

FIG. 3 is a block diagram illustrating a control device according to the embodiment;

FIG. 4 is a flowchart illustrating a method for manufacturing a dry matter according to the embodiment.

FIG. 5 is an explanatory diagram showing test results of the manufacturing method according to the embodiment and a conventional method.

FIG. 6 is an explanatory diagram showing changes in moisture and surface temperature during a drying process.

[Explanation of Reference Codes] A Ariko Production Equipment 1 First Drying Room 2 Second Drying Room 4 Partition 5a One-side Ventilation Port of First Drying Room 5b One-End Ventilation Port of First Drying Room 6a One End of Second Drying Room Side ventilation port 6b The other ventilation port at the other end of the second drying chamber 9 First drying air blowing device 10 Second drying air blowing device 11 Radiator 12 Propeller type blower 13 Truck 30a, 30b Temperature and humidity sensor 31a, 31b Sardine surface Temperature measurement sensor 35 Hot air drying control unit 37 Packing control unit 39 Inverter 40 Replacement control unit of air blowing device for drying 41 Valve of radiator

Claims (8)

[Claims] 1. A hot air is supplied to a drying chamber containing a dry material to dry the dry material with hot air, and the radiator is stopped during the hot air drying to supply air at an outside air temperature. A method for producing dry matter, characterized in that dry matter is dried by providing a compressing time by operating only a blower at a plurality of intervals. 2. A hot air is alternately supplied from both ends of the drying chamber into a drying chamber accommodating a dry raw material to dry the dry raw material with hot air, and an operation of a radiator is stopped during the hot air drying. A method for producing dry matter, characterized in that a dry matter is dried by providing a compressing time at a plurality of intervals by operating only a blower for supplying air at an outside air temperature. 3. The drying chamber is divided in parallel into a first drying chamber and a second drying chamber, and a drying air blowing device including a radiator and a blower is connected to one end of the first drying chamber and the second drying chamber. And the other end are alternately moved by a trolley, and the trolleys are moved so that one end and the other end of the first or second drying chamber are interchanged, and the destination of the hot air or the outside air temperature is moved. The method for producing a dry matter according to claim 2, wherein air is supplied by blowing air. 4. The method for producing dry matter according to claim 1, wherein the amount of air blown during the compressing time is controlled to be smaller than the amount of air blown when hot air is supplied. . 5. The compressing method according to claim 1, wherein the compressing is started when the surface temperature of the dry material becomes substantially equal to the wet bulb temperature of the hot air supplied into the drying chamber. The method for producing a dry matter according to any one of the above. 6. A compress performed in a state where the dryness of the dry matter is 40% to 15% of moisture among the compresses performed a plurality of times until the end of the drying is 1 ° C. below the surface wet bulb temperature of the dry matter. The method for producing a dry matter according to any one of claims 1 to 5, wherein hot air having a wet bulb temperature lower by 2 to 2 ° C is supplied. 7. A temperature sensor disposed in a drying chamber accommodating a dry matter, a control unit for operating a radiator and a blower for a predetermined time so as to maintain a drying set temperature by measuring the temperature sensor, and the drying unit. A control unit that activates only the blower for a certain time after a certain time elapses at the set temperature for use,
5. The method according to claim 1, further comprising:
A control device used in the method for producing a dry matter according to any one of the above items. 8. A temperature sensor disposed in a drying chamber accommodating a dry material, a control unit for operating a radiator and a blower for a predetermined time so as to maintain a drying set temperature by measuring the temperature sensor, and the drying unit. A control unit that activates only the blower for a certain time after a certain time elapses at the set temperature for use,
When only the surface temperature of the dry matter becomes approximately equal to the wet air temperature of the hot air by the sensor for measuring the surface temperature of the dry matter and the sensor for measuring the wet air temperature of the hot air, only the air is blown or the surface wet air temperature of the dry matter The control device for use in the method for producing dry matter according to claim 5 or 6, further comprising a control unit configured to supply hot air having a wet bulb temperature lower by 1 ° C or 2 ° C. [0001]