JP3007842B2 - Temperature and humidity control device for burley seed tobacco drying room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for drying burley leaf tobacco, and more particularly to an apparatus for controlling the temperature and humidity of a drying room in which leaf tobacco is hung in a browning period.

[0002]

2. Description of the Related Art Burley leaf tobacco drying is usually performed by knitting harvested leaf tobacco and turning yellow in a pipe house.
The browning period and drying are advanced, and suspended in the standard drying room at about 50-70% of the browning period, and dried in the standard drying room until the end of the bone dry period, and a series of operations takes about 40 days. Ends, but
In recent years, steaming, rotting,
In order to prevent the generation of mold, an automatic control device for controlling the temperature and humidity in the standard drying room has been introduced. The temperature / humidity automatic control device in the standard drying room is provided with a temperature / humidity controlling device such as an intake damper, a circulating system fan, a dehumidifying fan, a burner, a humidifier, etc. This is a two-position control that controls the operation and guides the drying room into the range of suitable drying conditions. Depending on the weather conditions during the operation, either the sunny control mode or the rain control mode stored in the storage means of the microcomputer is controlled. Program can be selectively executed.

Usually, the sunny control mode is a control giving priority to ventilation and the rain control mode is a control giving priority to temperature. Switching between the two modes is performed manually by a drying manager (cultivator) operating a mode switching switch. It is supposed to do. Therefore, when the operation is started at 8:00 am, not only must the control mode be set without fail, but once the mode has been set, the mode must be switched every time the weather condition changes. It was inconvenient and troublesome.

[0004] Further, no matter which control mode is selected,
When the temperature and humidity in the drying room are guided to the appropriate range, the operation of all the temperature and humidity control equipment will be stopped for a certain period of time, and the operation of the necessary temperature and humidity control equipment for a certain period of time will be performed. The intermittent operation is performed alternately.However, the intermittent operation is generally stopped for 27 minutes and repeated for 3 minutes. High temperature condition. In addition, leaf tobacco in this atmosphere becomes hot leaves and deteriorates in quality, so that opening and closing of skylights and the like must be controlled.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a first object of the present invention is to save labor in drying management work. Also,
And the second purpose is to prevent the variable evil flavor and taste of the leaf tobacco by the drying chamber top becomes hot during operation stop of the intermittent operation after drying indoor temperature and humidity is derived in a range of suitable conditions The goal is to improve quality.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, one of two types of control programs for rainy weather and fine weather stored in a program storage means is selected. Then, the temperature and humidity control devices provided in the standard drying room are automatically controlled based on the control program in the selected mode, and the temperature and humidity in the standard drying room are guided and maintained in an appropriate condition range. A burley seed leaf tobacco drying room temperature / humidity control device, comprising: an outside air humidity detection unit that detects outside air humidity outside a standard drying room; and a mode selection unit that selects a mode of a control program based on the detection humidity of the outside air humidity detection unit. When the relative humidity of the outside air is more than a predetermined value, for example, 85% or more, the control program of the rain mode is automatically selected, and when it is lower than that, the control program of the sunny mode is automatically selected and controlled. It is intended to as the cause, deer
The program mode selection by the mode selection means
During the operation time of the control device at regular time intervals
It is characterized by performing .

Hereinafter, each configuration of the present invention will be described in more detail. In the present invention, the standard drying room is a dark room closed type drying room for suspending burley tobacco that has been dried to about 50 to 70% of the browning period in a pipe house and drying until the end of the bone dry period. is there. The temperature control and humidity control devices are, for example, a dehumidification fan, a circulating system fan, a burner of a hot air generator, an intake damper, an air shutter, a humidifier, and the like provided in a standard drying room. It is provided at the exhaust port opened above the drying room. The circulating system fan corresponds to, for example, a blower fan of a hot air generator, an intermediate fan provided at an appropriate position in an upper part of a standard drying chamber, a circulator, and the like. The outside air humidity detecting means for detecting the outside air humidity is, for example, a relative humidity sensor or a dry-wet bulb sensor, and performs the relative humidity conversion in the latter case. Also, the mode selection means
This is a means for realizing a function of selecting one of the two modes of control programs for rainy weather and fine weather stored in the storage means based on the detected humidity of the outside air humidity detecting means, and is constituted by a microcomputer. You.

In the temperature / humidity control device for the burley leaf tobacco drying room configured as described above, when the control is started, the control mode is automatically set based on the outside air humidity detected by the outside air humidity detecting means. Once selected, temperature / humidity control is executed by the program in the selected mode. Therefore, it is not necessary for the drying manager to manually select the control mode by operating the mode changeover switch according to the weather conditions of the day every morning, and it is possible to save the labor of the drying management work, and of course, the cultivator decides. The control mode is selected based on the actual relative humidity of the outside air detected by the humidity detecting means, not the apparent weather condition, so that the optimal control mode is reliably selected, and the quality of leaf tobacco can be improved. .

Further , in the present invention, the mode selecting means
Selection of the program mode during the operation of the controller.
Since the control mode is always performed at predetermined time intervals, even if the control mode is selected at the start of the control, if the weather condition during the control operation changes, the control mode is reviewed based on the weather condition each time. The control is automatically switched to a control mode according to the changed weather condition.

Accordingly, there is no need to manually switch the control mode every time the weather conditions change, so that it is possible to save the labor of the drying management work, and it is also possible to save the weather for some reason such as the absence of a manager. There is no danger that the control mode cannot be switched in accordance with the change of the condition, and that the leaf tobacco may be stuffy, rot or moldy. Therefore, managers are stationed near the site (at home) in preparation for sudden changes in weather conditions
There is no need to cultivate, and the restraint on drying management for cultivators is eased.

According to the second aspect of the present invention, either one of the control programs for the rainy mode and the fine weather mode stored in the program storage means is selected, and the temperature / humidity control device provided in the standard drying room is selected. A temperature and humidity control device for a burley seed leaf tobacco drying room that automatically controls the types based on the selected control program, wherein the automatic control of the temperature and humidity control devices based on the control program is performed by controlling the temperature and the temperature in the drying room. After the humidity is guided to the appropriate condition range, the temperature control and humidity control devices are controlled intermittently, and when the operation is stopped, all the temperature control and humidity control devices are stopped. A dehumidifying fan and an air shutter provided in the upper part of the drying chamber as part of the humidity control equipment, an upper temperature detecting means provided in the upper part of the standard drying chamber to detect the temperature of the part, and during the intermittent stop control. Upper temperature detection When the means detects a temperature equal to or higher than a predetermined set temperature, by providing the above-mentioned exhaust fan and an abnormally high temperature ventilation control means for operating an air shutter, the drying chamber which has become hot when the operation is stopped in intermittent operation. The upper air is ventilated by outside air.

In the temperature / humidity control apparatus for a burley leaf tobacco drying room having such a configuration, during the temperature / humidity control, when the intermittent operation is stopped, the temperature in the upper part of the drying room is detected, and the detected temperature is set. When the temperature exceeds the temperature, the ventilation shutter and ventilation fan are activated to ventilate the high-temperature air in the upper part of the drying chamber by the outside air. It is possible to prevent an abnormally high temperature that adversely affects leaf tobacco. . This eliminates the need for providing a skylight or the like in the standard drying room and manually opening and closing the skylight during temperature and humidity control, thereby saving labor. In addition, the tobacco suspended in the upper part of the drying chamber is prevented from becoming a high-temperature leaf and causing a deterioration in flavor and the quality is improved. Moreover, since the humid air in the middle of the leaf does not move, there is no adverse effect on leaf tobacco suspended below the middle stage.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral A denotes a standard drying room, which is formed in a warehouse shape (shed) having a gabled roof having, for example, a steel frame, metal panel walls and a roof. It has a structure that can be multiplied by many.

In the standard drying room A, an outside air humidity detecting means 1 for detecting the humidity of the outside air, an indoor humidity detecting means 2 for detecting the humidity in the drying room A, an outside air temperature detecting means 3 for detecting the outside air temperature, a drying room Each detecting means such as an indoor temperature detecting means 4 for detecting the temperature in A, an upper temperature detecting means 5 for detecting particularly the temperature in the upper part of the drying chamber A, and the like are provided. 6. Ventilation shutter 7, hot air generator 8, intermediate blower fan 9, circulator 10, humidifier (not shown) are provided, and these temperature and humidity control equipment is usually from 8:00 am to 5:00 pm During this period, the operation is controlled by the control device 11 based on the temperature / humidity data detected by each of the detection means 1 to 5, and the temperature and humidity inside the drying chamber A are adjusted to an appropriate state.

In this case, the above-mentioned proper state is 32 ° C. ≧ temperature ≧
22 ° C., 85% ≧ relative humidity ≧ 70%, as shown in FIG.
85% at temperature <22 ° C ≥ 70% so that dehumidification is performed when temperature is <32 ° C and 85% <relative humidity. %, So that the relative humidity <70% at 32 ° C ≧ temperature ≧ 22 ° C
In such a case, the operation of the dehumidifying fan 1, the ventilation shutter 2, the hot air generator 3, the intermediate blower fan 4, the circulator 5, and the humidifier is controlled by the control device so as to humidify.

The outside air humidity detecting means 1 is provided outside the drying chamber A,
The indoor humidity detecting means 2 is installed at an appropriate position in the drying room A, and outputs a humidity signal corresponding to the detected humidity to the control device 11.

Each of the temperature detecting means 3 to 5 comprises a temperature sensor. The outside air temperature detecting means 3 is located outside the drying chamber A, and the upper temperature detecting means 5 is located at the upper part of the drying chamber A, for example, in the attic above the beam. The temperature detecting means 4 is installed at an appropriate position in the drying chamber A, preferably at a central portion, and outputs a temperature signal corresponding to the detected temperature to the control device 11.

The dehumidifying fan 6 is provided at an exhaust port 66 formed on the wall a on one wife side of the standard drying chamber A, and the ventilation shutter 7 is provided on the wall b on the other wife side. The wet fan 6 is located at a position slightly lower than the beam of the standard drying room A, and the ventilation shutter 7 is located at a position higher than that.

The hot air generator 8 has a conventionally well-known structure in which a burner, a blower fan, a heat exchanger and the like (not shown) are housed and arranged in a body 81, and the hot air generator 8 has a wall a on the side of the wife provided with the moisture exhaust fan 6. And an intake port 82 with an intake damper (not shown) is opened outside the drying chamber A. The hot air generator 8 has a circulation port 83 at the upper part of the fuselage 81 that extends to the attic above the beam of the drying chamber A and opens toward the ventilation shutter 7 side. The hot air outlet 84 has an eave-side wall c.
Are connected to a duct 85 extending on the floor, and a plurality of mesh ducts 86 are connected to the duct 85 and extend toward the other end b on the floor. The intermediate blower fan 9 is appropriately disposed in the attic above the beams of the standard drying chamber A with the blow direction directed toward the circulation port 83 of the hot air generator 8.

The circulator 10 is appropriately provided at a height slightly lower than the beam of the standard drying chamber A, and a flexible duct 101 attached to the outlet thereof hangs down to near the floor.

The control device 11 is electrically connected to the humidity and temperature detecting means 1 to 5 and the temperature and humidity control devices 6 to 10 so as to be located at an appropriate position inside or outside the standard drying room A. It is provided and mainly comprises a microcomputer. The control device 11 controls the temperature and humidity control devices 6 to
Selection of 10 and operation patterns of these temperature and humidity control devices 6 to 10 (including the operation of adjusting the opening of the intake damper)
A program storage means 111 such as a ROM or a RAM for storing a program obtained by programming a program, a program reading means 112 for reading a program stored and held in the program storage means 111, and a program read by the program reading means 112 A program execution means 113 comprising, for example, a CPU for executing the program, a data storage means 114 such as a RAM for storing data temporarily obtained during control and arithmetic processing of the program execution means 113, and execution of the program. And a D / A converter for converting the program execution result of the program execution means 113 into actual selection signals and operation signals for the temperature control / humidification devices 6 to 10. Means 116, and in the present invention, the program storage means 111 has 10 two modes control program for sunny and wet weather the respective operation patterns are different are stored.

Further, the control device 11 inputs the humidity data of the outside air detected by the outside air humidity detecting means 1 and, based on the two types of programs stored in the program storage means, in accordance with the input data, for the rainy weather or the rainy weather. A mode selecting means 117 for selecting one of the fine weather control modes is provided. Only the program of the mode selected by the mode selecting means 117 is read by the program reading means 112.

The program storage means 111 of the control device 11
Are shown in the flowcharts of FIGS. 6 to 8. Hereinafter, an outline of the operation of the control device 11 will be described based on a flowchart. When the power is turned on, the operation of the control device 11 is started. First, it is confirmed that the current time is a predetermined start time (for example, 8:00 am), and preparation for a predetermined time (for example, 5 minutes) is performed. Driving. Although the power can be turned on by a manual operation of the power switch, it is convenient if the power is automatically turned on at a predetermined time every morning by using a 24-hour timer.

After the completion of the preparatory operation, the control program in the rain mode is executed if the outside air humidity detected by the outside air humidity detecting means 1, that is, the relative humidity outside the drying chamber A is 85% or more, and if the humidity is lower than 85%. The control program of the fine mode is selected, and the operating program (burner, blower fan, intake damper) of the dehumidifying fan 6, the ventilation shutter 7, the hot air generator 8, the intermediate blower fan 9, the circulator according to the selected control program.
The operation of Step 10 is controlled to guide and maintain the temperature and humidity in the drying chamber A to an appropriate zone. At this time, the burner of the hot air generator 3 controls the temperature difference between the outside air temperature and the outside air temperature based on the temperatures detected by the outside air temperature detecting means 3 and the indoor temperature detecting means 4. And
At the set end time (for example, 5:00 pm), a predetermined cool-down operation is performed to stop the control.

The control in each of the fine and rainy modes is performed in accordance with the procedures shown in the flowcharts of FIGS. As is clear from FIGS. 7 and 8, both the fine and rainy modes are repeatedly executed in a control cycle of a predetermined time (for example, 3 minutes), and the relative humidity of the outside air detected by the outside air humidity detecting means 1 at the start of each control cycle. Check and review the control mode selection. Also, in both the fine and rainy modes, when the temperature and humidity in the drying chamber A are guided to the appropriate zone, the operation is performed for T1 time (for example, 3 minutes),
The intermittent operation is stopped for T2 time (for example, 27 minutes). During the T1 time operation, the ventilation fan, the intermediate ventilation fan 9, the circulator 10, and the dehumidifying fan 6 of the circulating system fan are operated and stopped for T2 time. At times, in principle, the operation of all the temperature / humidification devices 6 to 10 including the above-mentioned fans is stopped. However, the humidity exhaust fan 6 and the ventilation shutter 7 are separately controlled based on the temperature of the upper portion of the drying chamber A. That is, the detection data of the upper temperature detecting means 5 is input to the control device 11,
During the time stop, the upper temperature detecting means 5 sets the set temperature, for example, 40
An abnormally high temperature ventilation means 118 which outputs an abnormally high temperature signal when a high temperature of not less than ℃ is detected is provided.
The program for abnormally high temperature ventilation stored in 1 is read by the program reading means 112, executed by the program executing means 113, and controlled to open the ventilation shutter 7 and to operate the moisture exhaust fan 6, The hot air in the upper part of the drying chamber A is ventilated by the outside air without moving the humid air in the middle of the leaves.

It should be noted that, when the control of the dehumidifying fan 6 and the ventilation shutter 7 at the time of the stop of the time T2 is performed and when the control is not performed, the result of the test in the fine weather shows that when the control is not performed, the outside air temperature 32 is controlled. When the temperature is ℃, the temperature in the upper part of the drying chamber A is
Although the temperature was 37 ° C., when the control was performed, the temperature in the upper part of the drying chamber A was 32 ° C. when the outside air temperature was 32 ° C.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a temperature / humidity control device of a burley seed leaf tobacco drying room of the present invention.

FIG. 2 is a plan view illustrating an arrangement state of temperature control / humidity control devices provided in a standard drying room.

FIG. 3 is a side view as viewed from the same eaves side.

FIG. 4 is a side view seen from the wife side.

FIG. 5 is an explanatory diagram illustrating a state of temperature and humidity adjustment.

FIG. 6 is a flowchart illustrating a control program stored in a storage unit.

FIG. 7 is a flowchart illustrating a control program for a rainy weather mode.

FIG. 8 is a flowchart illustrating a control program for a fine weather mode.

[Explanation of symbols]

A: Standard drying room 1: Outside air humidity detection means 5: Upper temperature detection means 6-1O: Temperature control / humidity control equipment (6: Dehumidification fan, 7: Ventilation shutter, 8: Hot air generator, 9: Intermediate ventilation) Fans, 10:
(Circulator) 11: Control device 111: Program storage means 117: Control mode selection means 118: Abnormal high temperature ventilation means

Claims (2)

(57) [Claims] 1. One of two control programs for rainy weather and fine weather stored in a program storage means is selected, and the temperature and humidity control equipment provided in a standard drying room is selected. In a temperature / humidity control device for burley seed leaf tobacco drying automatically controlled based on a control program, an outside air humidity detecting means for detecting outside air humidity outside a standard drying room, and a control program based on the detected humidity of the outside air humidity detecting means. A mode selection means for selecting a mode ,
Controls the selection of the program mode by the mode selection means.
A temperature / humidity control device for a burley seed tobacco drying room, characterized in that the temperature / humidity operation is carried out at predetermined time intervals throughout the operation time of the device. 2. The method according to claim 1, wherein one of the control programs for rainy mode and fine weather stored in the program storage means is selected, and the temperature and humidity control devices provided in the standard drying room are selected. A temperature and humidity control device for a burley seed tobacco drying room automatically controlled based on a control program, wherein automatic control of temperature and humidity control devices based on the control program is performed when the temperature and humidity in the drying room are within an appropriate condition range. After being guided to the above, in the control including intermittent operation of the temperature and humidity control equipment and stopping the operation of all the temperature and humidity control equipment when the operation is stopped, A moisture exhaust fan and an air shutter provided as an upper part of the drying chamber, an upper temperature detecting means provided at an upper part of the standard drying chamber to detect a temperature of the part, and the upper temperature detecting means during the intermittent stop control. Is the prescribed setting When a temperature equal to or higher than the temperature is detected, the humidification fan and the abnormal high-temperature ventilation control means for operating the air shutter are provided.
Humidity control device.