JPH0658191B2 - Strawberries drying method - Google Patents

Description

The present invention relates to a method for drying strawberries.

"Conventional technology" Rush is cultivated for about 20,000 ha mainly in the Yatsushiro region of Kumamoto prefecture and the Chikugo region of Fukuoka prefecture. Currently, the work system is being mechanized, and high-performance machines are being introduced for transplanting and harvesting work. However, the mechanization of the drying and preparation work (mud dyeing, drying, bundling, etc.) that requires the most labor and energy is still insufficient, and an efficient response is delayed. In order to maintain freshness, rush must be soaked in a turbid liquid containing finely crushed stone called mud dyeing after harvesting, and after it is dyed, it can be dried with a large amount of water. For drying, rushes are packed vertically on a slat board, and a dryer that dries hot air has spread to each production farmer, and drying and preparation work is performed individually. However, since this drying system is an open type hot air pressure drying, it requires a large amount of heat energy, and most of it is wasted, resulting in many energy efficiency problems. In addition, the pressure-feeding drying method of standing up tends to cause unevenness of drying due to the position of the rush and the elapsed time, resulting in coexistence of overdried and undried portions, discoloration
Quality irregularities such as fragility occur. Further, this hot air drying method has a problem in noise prevention because it requires a large blowing fan in terms of removing a large amount of water, static pressure, and air volume, and results in a limitation in the operation of the dryer at night. Research on the drying and preparation work of rushes is centered on the research institutes of the production prefectures.
Although many attempts have been made to improve the drying room, use a coke combustion furnace, and a drying system that uses solar heat, all of them have drawbacks in efficiency, energy saving, quality retention, etc. Not in. (Fukuoka Prefectural Agricultural Experiment 198
3.1984. Study on establishment of mechanized work system of igusa, Koichi Tanaka, Mikio Nanbu, Tomoyuki Murakami, Tomio Tajima, Takenori Shimamura, Yasuo Ishigiwa, 1984. 1985. Drying rushes with combined solar energy and alternative fuels (1st report, 2nd report)
Report) Practicality test of a drying facility. Kyushu Agricultural Research 47:19
6).

[Problems to be Solved by the Invention] The present invention improves the efficiency, energy saving, uniform drying and quality retention by uniformly and uniformly reducing the gaps between the parallel strawberries in the drying process of strawberries. The purpose is to

"Means for Solving the Problems" The present invention vertically fills a synthetic resin flexible membrane cylinder with parallel straw bundles, and connects a duct of the same diameter to at least one end of the same cylinder. It is constituted by a strawberry-drying method, characterized in that the above-mentioned strawberry-row is dried by forced suction air to the duct.

[Action] Therefore, the mutual gap between the parallel strawberries in the ventilation channel is reduced because the pressure on the outflow side of the air is lower than that on the inflow side. In addition, the density of the parallel strawberries is uniform throughout. The diameter of each of the strawberries is reduced by drying, but the mutual gap does not increase with the reduction, and the diameter decreases as described above.

[Example] The parallel strawberries 1 were vertically filled in the synthetic resin flexible membrane tube 3,
A duct 4 having the same diameter as that of the same tube 3 is connected to at least one end of the same tube 3, and an axial blower 5 is provided at the opening of the tip of the same tube 4 to suck air from the tube 3 by the blower 5. Discharge from the opening 6. An air conditioning heater 8 and a dehumidifier 9 can be provided at the other end of the cylinder 3 via a duct 7. As shown in FIG. 2, instead of the flexible membrane cylinder 3, the bottom of an upper opening box composed of side plates 10 is formed by a net 11, and the parallel strawberries 1 are laterally filled on the net 11 to form the parallel strawberries. The upper surface of 1 is moss 12
Alternatively, the air suction duct 4 may be connected to the hopper 13 provided on the bottom surface. The air passage 2 formed by the cylinder 3 or the side plate 10 is filled with the parallel strawberries 1. The air pressure passing through the ventilation passage 2 by forcibly sucking air by the blower 5 is low on the suction side and high on the suction side, so that the gaps between the straw-growing lines are uniformly reduced as a whole, and the parallel straw-growing is reduced. The flexible membrane cylinder 3 and the scabbard 12 come into contact with the outer circumference of the strip 1 by a pressure difference from the external pressure. Table 1 shows the air circulation state of strawberry bundle air by the conventional compressed air and the suction air drying of the present invention. Further, Table 2 shows the power consumption of the straw-bundle ventilation by the compressed air and the suction-air drying of the present invention.

As shown in FIG. 3, the drying temperature has been conventionally about 70 ° C., but it is a temperature range in which high-temperature failure is easily caused, so-called “burning”, and caution is required. For this reason, drying at 60 to 50 ° C is safe and convenient.

"Effect" Since the present invention uses the above-mentioned method, not only the amount of dry air of strawberries can be reduced and the unevenness of drying can be reduced, and not only efficient drying can be achieved but also energy saving and quality can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an apparatus for carrying out the strawberry drying method of the present invention, and FIG.
FIG. 3 is a longitudinal sectional view of an embodiment of a ventilation passage, FIG. 3 is a perspective view of a part of FIG. 1, and FIG. 4 is a drying temperature diagram. 1 ... Parallel strawberries, 2 ... Ventilation path.

Claims (1)

[Claims] 1. A parallel straw bundle is vertically filled in a synthetic resin flexible membrane cylinder, a duct having the same diameter as that of the same cylinder is connected to at least one end of the cylinder, and forced suction air into the duct is used for the above. A method for drying strawberries, which comprises drying the strawberries.