JPS591978A - Differential-temperature differential-pressure drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention provides a method for storing grains (rice, wheat, beans, etc.) in a warehouse.
Other agricultural products (dried potatoes, shiitake mushrooms, tobacco, medicinal herbs, etc.)
, marine products, wood, etc., in a short period of time and at a relatively low temperature (necessary to avoid quality loss). It is divided into two compartments, a drying room and a differential greenhouse, and an air intake device is installed at the boundary between the compartments, and the condenser and evaporator of any refrigeration equipment are installed in the differential greenhouse, as well as a heating device close to the condenser. The air in the drying chamber is sucked by the suction action of the suction device, and the amount of air still sucked into the drying chamber is controlled by the ventilation control board.
A differential pressure (pressure difference) is generated between the drying chamber and the differential greenhouse, and the air discharged into the differential greenhouse by the air intake device is heated by heat exchange with the condenser of the refrigeration device (e.g., 20°C rank 40
~50℃), and then use a heating device to supplementally raise the temperature (
e.g., about 50 to 60℃) and reaches the evaporator for heat exchange (cooling)
to lower the temperature (e.g., about 30 to 40 degrees Celsius) and condense and remove moisture in the air, drying the air (e.g., about 30 to 40 degrees Celsius).
The air is then sucked into the drying chamber again through the ventilation control plate, and this air circulation flow is repeated repeatedly for rapid drying.

And, in the above, it is normal temperature or high temperature (e.g. 30 to 4
Dry air at a temperature of about 0°C (approximately 0°C) is sent into the drying chamber, but depending on the purpose, if the equipment is installed in the order of 50-1001, high-temperature dry air can be obtained and high-temperature drying can be performed. .

That is, the present invention utilizes the heat exchange effect between the condenser and evaporator of the refrigeration system to create a large temperature difference (temperature difference) in the circulating air inside the refrigerator.
It generates water efficiently and much more energy-savingly than conventional drying equipment using oil-fired heat, and at the same time removes moisture from the air. ) Drying method (a drying method that utilizes the principle that under reduced pressure, the boiling point, evaporation point, etc. are lower and the atmosphere is always unsaturated, so rapid drying can be performed at a relatively low temperature.) In the present invention, a pressure difference (differential pressure, drying room: low pressure, differential greenhouse: high pressure) with the differential greenhouse is generated by controlling the amount of ventilation into the drying chamber by the ventilation control board and by the suction action by the intake device. Therefore, the combination of the above-mentioned temperature difference and pressure difference produces an extremely effective drying effect.

Next, one embodiment of the device of the present invention will be explained with reference to the drawings.
The interior of the storage body, such as a cube, which is suitably formed with a panel 3 etc. equipped with a door control and has excellent heat insulation performance, is divided into a bulkhead plate ψ made of an appropriate material having heat insulation properties and strength, and a ventilation control plate S (
For example, a plate with many small holes 6 perforated on the entire surface) is used to divide the drying room A into two, forming a drying room A and a differential greenhouse B1, specifically a differential greenhouse B and a ventilation chamber 13+ connected to it. An appropriate air intake device 7, such as an intake fan, an intake (exhaust) pump, etc., is installed at the boundary position of the differential greenhouse B (the boundary on the opposite side from the ventilation control board S), and a refrigeration system of any configuration is installed in the differential greenhouse B. A condenser g and an evaporator 9 of the device C (mainly using a refrigeration device for a large refrigerator-freezer), and an appropriate heating device 10 at a rear position close to the condenser. For example, an electric heater is installed, and the compressor//, auxiliary condenser/2, and other attached equipment of the refrigeration equipment C, the automatic temperature controller 13, the automatic humidity controller 17, etc. are installed as appropriate outside the refrigerator, and the entire system is It is composed of

In addition, if the arrangement of the condenser zone, evaporator 9, and heating device 10 in the differential greenhouse B is set to 1O-9- as shown in the figure, drying at a relatively low temperature (for example, about 30 to 40 degrees Celsius) can be carried out. ,
If it is set to 9- or r-10, drying can be carried out at a high temperature (eg, 50 to 100°C or higher), and the setting is arbitrary depending on the purpose.

The ventilation control board S may be any other suitable material such as a board with small holes 6 perforated on its entire surface as shown in the illustrated example, a mesh board, a punching plate, etc. In short, air is taken into the drying room A from the ventilation chamber Bt. It has the effect of narrowing down the amount of air at the time to a set amount, and also has the effect of evenly distributing the dry air and ventilating it evenly and evenly throughout the drying room A. It has the effect of uniform air contact and uniform drying at the same time.

Therefore, although not shown in the drawings, for example, a shutter plate may be attached to the ventilation control plate 5 to adjust the opening number or hole diameter of the ventilation holes B, thereby controlling the amount of ventilation, that is, the degree of differential pressure generated by the intake device 7. It can also be freely adjusted in conjunction with the intake strength adjustment.

In the figure, lψ is a shelf arranged horizontally at equal intervals in the drying chamber A, on which articles to be dried are placed. Drying room A
Depending on the target item, shelves, full-screen shelves, hooks, hangers, etc. are appropriately arranged inside the container, but it is desirable to arrange them so that ventilation can uniformly contact all the items.

/3 is a mesh plate or a partition plate or filter plate with many large holes, and if necessary, it should be installed on the exit side of the drying chamber A (in front of the air intake device 7), but the ventilation should not be controlled. is desirable.

In the above configuration, when the apparatus of the present invention is loaded with articles on the shelf board or the like of the drying chamber A, and then the refrigeration device C and the air intake device 7 are operated and the heating device io is heated, l), the drying chamber A The air inside is sucked into the air intake device 7 and exhausted into the drying chamber B. At this time, the amount of air flowing into the drying chamber A is adjusted and restricted by the ventilation control plate S due to this suction action. A differential pressure is generated between the drying chamber A and the greenhouse B (the pressure in the drying chamber A is lower than atmospheric pressure, and the pressure in the differential greenhouse B is higher than atmospheric pressure).
Due to this differential pressure effect, the articles in the drying chamber A can be efficiently dried even at a relatively low temperature (eg, about 30 to 40°C). Therefore, it is ideal for drying items that are not suitable for high temperature drying to protect quality.

2) If the ventilation control plate S is configured to have a large number of small holes perforated over the entire surface, a uniform ventilation flow will be formed throughout the drying chamber A, and new drying air will be constantly supplied. All articles can be evenly fluidized and dried evenly and in a short period of time.

3) Next, the air (e.g., humid air at about 20° C.) sucked into the air intake device 7 and discharged into the differential greenhouse B, in the illustrated example, first contacts and passes through the condenser of the refrigeration device C. Then, it is heated (e.g., to about 40 to 50 degrees Celsius) by exchanging heat with the vessel, and further, the temperature is auxiliary raised (e.g., to about 50 to 60 degrees Celsius) by the electric heating device 10, and it reaches the evaporator 9. , and passes through the container 9 in contact with each other to exchange heat and lower the temperature (e.g., to about 30 to 40° C.), and at the same time, moisture in the air is condensed and removed (e.g., discharged outside the refrigerator through the drain pipe 16).

), and is circulated as heated dry air (for example, about 30 to 40° C.) from the ventilation chamber 31 to the drying chamber A via the ventilation control plate S.

4), that is, heated dry air (e.g., about 30 to 40°C) is blown into the drying chamber A, and under differential pressure, it contacts and dries the peripheral surface of the article, removes moisture, and lowers the temperature (e.g., 20℃
The air is sucked in by the air intake device 7, heated once (e.g., to about 50 to 60 degrees Celsius) in the differential greenhouse B, and then quickly cooled by the evaporator (to about 30 to 40 degrees Celsius) to remove moisture. By forming a circulating flow for removal and drying, and creating a temperature difference between them (the temperature difference between each is about 20°C), the air that has decreased in temperature and absorbed moisture during article drying is turned into dry air at the set temperature again. It is something that converts.

5) In addition, when high-temperature drying is to be performed, in the above example, the heating capacity of the condenser is utilized to the maximum, and the high-temperature waste is directly fed to the evaporator. If there is, it is possible to use an auxiliary condenser and increase the temperature rise by the heating device again, but it is also possible to arrange the condenser, heating device 10, and evaporator 9 in the opposite way to the illustrated example. If the order is 9, za, 10, high temperature dry air (
For example, 50 to 100° C. or higher) can be generated and fed to a drying chamber under differential pressure to perform high-temperature drying.

6) The temperature difference between the condenser, the heating temperature by the heating device 10, and the cooling temperature by the evaporator 9 is controlled by automatic operation control of the refrigeration device by the automatic temperature controller 13, etc., and automatic turning on of the heating device. % OFF, differential pressure adjustment is performed by automatic control of the output of the intake device, automatic control of the number and diameter of holes in the ventilation control board, etc., and humidity adjustment is performed by the automatic humidity adjustment device 17. is possible.

As described above, the apparatus of the present invention can provide an excellent drying apparatus that performs extremely efficient and uniform drying within a short time due to the combined effect of the temperature difference generation function and the differential pressure generation function, In particular, the energy consumed is the operating energy of the refrigeration system and the intake system, and the thermal energy of the heating system that performs a small amount of auxiliary heating (usually both of them are electric power). Compared to drying equipment that uses thermal energy, this method has great economical effects as it can achieve significant energy savings.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of an embodiment of the device of the present invention, FIG. 2 is a sectional view taken along the arrow A/A// in FIG. 1, and FIG.
B'' is a sectional view taken along the arrow. Numbers: A: Drying room, B: Differential greenhouse, BI: Ventilation room, C: Refrigeration device, l: Warehouse, 2... Door, 3... Panel, t... Partition plate, 5... Ventilation control board, 6... Small hole thereof, 7...
・Intake device, za... condenser, 9... evaporator, 10...
・Heating device, //... Compressor, /2... Auxiliary condenser, 13... Automatic temperature controller, /q-... Shelf, 15.
...Partition plate, 16...Drainage pipe, l7...Automatic humidity control device. No. 1 Revised Figure 2

Claims (1)

[Claims] The interior of the warehouse is divided into two compartments, a drying room and a differential greenhouse, using partition walls and ventilation control plates, and an air intake device is installed at the boundary between the compartments. A heating device is installed close to the refrigeration device, and a large temperature difference is generated in the circulating air by the heat exchange action of the condenser and evaporator of the refrigeration device, and at the same time, moisture in the air is removed. At the same time, a large pressure difference (differential pressure, A differential temperature and differential pressure drying apparatus characterized in that articles stored in a drying chamber are efficiently dried at a relatively low temperature within a short time by the combined effects of differential pressure.