JPH0240470A - Low-temperature storage device for agricultural product - Google Patents

Abstract

PURPOSE:To improve cooling efficiency and maintain the quality of stored products in a tank in good condition by a method wherein cooled air is sent into the tank from the upper part thereof and is sucked through a ventilating chamber at the lower part of the tank to circulate it. CONSTITUTION:A cooler 16, supplying cooled air for cooling grain or the like filled into a tank 1, blows out the cooled air into the upper part of the tank 1 from a discharging tube through a duct 67. The tank 1 is provided with a lower net 10, bored with a multitude of holes for passing the cooled air freely, at the lower part thereof and a space, surrounded by the lower net 10, a bottom plate 3 and a peripheral wall 2, is formed so as to be a ventilating chamber 15 while the other side of the ventilating chamber is communicated with the suction port 17a of a suction fan 17 communicated with the suction port of the cooler 16. According to this constitution, the total amount of the cooled air, discharged into the tank 1 after being cooled by the cooler, flows through stored products received in the tank and is retrieved whereby cooling efficiency may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a low-temperature storage device for storing agricultural products such as brown rice, paddy, beans, or vegetables.

(B) Prior Art Conventionally, a low-temperature storage device in which a cooler is provided at the top of a tank is already known from Japanese Utility Model Application No. 59-140824. A low-temperature storage device in which an air path is formed between the inner box and the cooling air mainly flows through the air path to cool the stored items in the inner box has already been disclosed in Japanese Utility Model Application Publication No. 57-79374. Are known.

(c) Problems to be Solved by the Invention In the fiii of the known low-temperature storage devices, the upper layer of rice stored in the tank is cooled, but it is difficult to cool the lower layer, and the lower layer of rice is cooled. There is a problem that as the grain gets closer to the take-out part, the grain gets hotter and deteriorates in quality, resulting in deterioration of taste. When the inner box is filled with particles, etc., they act as resistance and hardly flow, and most of the cooling air flows through the air path formed between the inner and outer boxes, so there is no flow inside the inner box. The grains are cooled indirectly through the wall material of the inner box, which results in low cooling efficiency and difficulty in cooling the center, making it difficult to store the whole grain in a uniformly cooled state. could not.

(d) Means for solving the problem The present invention provides a lower screen l located near the bottom of a tank l for storing agricultural products.
A ventilation chamber 15 is formed between the lower screen 10 and the bottom plate 3 by providing a ventilation hole 15, an air outlet of a cooler 16 is connected to the upper part of the tank l through a cold air passage, and an inlet of the cooler 16 is connected to the ventilation chamber 15.
The above-mentioned problem was solved by configuring the cooler 16, the cold air path, the inside of the tank 1, the ventilation chamber 15, and the intake air path into a sealed circulation path.

(e) Store brown rice, paddy, beans, vegetables, etc. in a working tank and seal it tightly.
When the cooler is operated, the cooling air discharged from the air outlet is sent to the top of the tank, and at the same time, the air chamber below is sucked in.

The cooling air is cooled as it flows downward between the produce stored in the tank, and the stored items can be directly cooled by circulating the cooling air between the top and bottom of the tank, as well as the center and periphery. .

(f) Example An example of the present invention will be explained with reference to the drawings.Tank 1
has a cylindrical peripheral wall 2 and a bottom plate 3 securely fixed to the lower surface of the peripheral wall 2.
and a funnel-shaped and gently sloped r toward the input port 4.
The peripheral wall 2 has a heat insulating material 6 interposed between the inner and outer cylindrical bodies 2a, and is rotatable in the center of the lid 7 that fits into the inlet 4, but does not move forward or backward. The screw 8 with a knob that has been inserted in this way is screwed into the screw hole of a locking rod 9 that is fixedly installed on the lower surface of the inlet 4, and a rubber gasket is glued to the lower surface of the outer periphery of the lid 7. Insert lid 7 into inlet 4
When the screw 8 is fitted and the screw 8 is tightened, it is sealed.

The lower screen 10 is made of a metal plate or a synthetic resin plate with a large number of holes 11-. through which cooling air can freely pass through, even though relatively small agricultural products such as brown rice will not leak, and is discharged toward one side. It has an outlet 12, and the outlet 12 is pressed against the upper surface of the rim of the outlet bored in the bottom plate 3 as shown in FIG. 3 and the surrounding wall 2 is configured as a ventilation chamber 15, and on the other side of the ventilation chamber 15 there is an intake port 17a of an intake fan 17 that communicates with an intake port of a cooler 16, which will be described later. They communicate as shown in Figure 3.

The receiving frame 18 includes a cylinder 19 having the same diameter as the tank l, and a lower plate 20.
, a large number of support plates 21 fixed to the upper surface of the lower plate 20 and the inner peripheral surface of the cylinder 19 at intervals in the circumferential direction, and the upper surface of the support plates 21 and the inner periphery of the upper end of the cylinder 19. The bottom plate 3 of the tank 1 is placed on the top plate 22, and a suitable plate is placed on the upper surface of the outer circumferential part of the bottom i3 and the inner circumferential surface of the lower part of the tank 1. +111'a
A large number of pillars 25... are superimposed with each other, and the pillars 25...
The bolts 26 are inserted into the base plate and the bottom plate 3 of the board and the fixing nuts 27 are screwed in, and the pillars 25 are set so that the ones on the other side are higher than those on the negative side (discharge port 12fnll). It's become, said lower net! As shown in Fig. 4, an elliptical rod 23 consisting of a series of round bars fixed to the lower surface of the outer periphery of the lower screen 10 is placed and supported, and the outer periphery of the lower screen 10 is bent diagonally upward. Curved or curved bent part 2
8, so when the moon IO is inserted from above and the receiving rod 23 is placed on the support column 25, the bent portion 28 will be attached to the tank l.
When the tank l becomes large, the lower screen 10 is easily deformed, but can be accurately supported in a constant posture. In addition, a step portion protruding inward can be provided at a portion of the inner cylindrical body 2a corresponding to the upper part of the pillars 25 to support the lower screen in the same manner as the pillars 25.

Further, a zigzag-shaped guide plate 30 is fixed in a cylindrical body 29 whose lower part is an inclined surface at the lower part of the discharge port 12, and a partition plate at the tip engages and disengages from the step above the guide plate 30. The first shutter 31, which is pivoted so as to open and biased by a spring, is interlocked and connected to a metering lever 32 on the left side via a link 33, and a second shutter 36, which pivots a bending part 35, is moved by a spring. A sliding shutter 38 is provided at the upper part of the continuous extraction passage 37 formed between the guide 1Fi 30 and the side plate of the cylinder body 29, by urging the lower partition plate to be pressed against the upper surface of the lower part of the guide plate 30, This sliding shutter 38 is linked 4 to the right operating lever 39.
A retrieval box 41 is interlocked with 0 and has a see-through window 41a closed by a transparent plate on the lower side.A retrieval box 41 is inserted into the retrieval box 41, and a recessed groove is provided at the tip of the bottom of the retrieval box 41.
A first stopper 42, which also serves as a protrusion, is provided to correspond to the recessed groove in the state in which the first stopper 42 is inserted, and a second stopper 43 is provided adjacent thereto. Also, an intermittent timer 44 for setting an operating time and a stop time between the measuring lever 32 and the operating lever 39, switches 45 and 46, and an indicator light 47.
..., etc. are attached, and then screw the operating lever 39 on.
A temperature setting device 50 is provided on the side of the holder, a cleaning M51 is freely attached to the upper part with a screw, and a flow suppressing plate 52 having a dogleg-shaped cross section is attached to the upper part of the outlet 12.
3 to prevent the grains from flowing out all at once.A temperature sensor 55 is installed above the discharge port 12 or attached to a duct 68 connecting the intake fan 17 and the cooler 16.

On the lower surface of the lower screen IO, as shown in FIG. side) at a small angle, that is, the outer periphery of the lower screen lO and the outlet 1
The exposed surface h'1 of the lower screen 10 is arranged and fixed in a radial manner at an angle inversely proportional to the distance from the intake fan 17 between the chevron-shaped protrusions 56-. A fan-shaped shielding plate 57 with an area approximately proportional to
is fixed, and the number of holes 11 is reduced in areas close to the intake port 17a and where the suction force is large (and the number of holes 11 is increased in areas where the suction force is weak as they are successively spaced apart from the intake port 17a). This allows any part of the lower screen 10 to be sucked almost equally.

As shown in FIGS. 5 to 7, the cooler 16 faces, in order from the bottom of the frame 58, a compressor 60, a condenser 61, a cooling fan 63 rotated by a motor 62, an evaporator 65, and a blower fan 66 consisting of a sirocco fan.
The blower fan 66 communicates with a discharge pipe 64 provided at the upper side of the tank I via a duct 67 whose outer circumferential surface is coated with a heat insulating material, and which is connected to an opening on the outer surface of the evaporator 65. duct 6 to the outlet of the intake fan I7.
8, a dustproof net 69 which is removable and has a handle is interposed therebetween.

Further, the middle part of the side plate of the frame body 58 has an outer side. Remove the top h7
A water tank 71 is provided which is removably locked at the evaporator 2365, and a water collection funnel 72 provided at the bottom of the evaporator 2365 faces one side of the water tank 71 to collect water condensed by the evaporator 65. A drain tank 74 is placed on a movable pedestal 73 which has one end hinged to the side of the compressor 60, and a detection signal from a pressure-sensitive switch 75 installed on the lower surface of the movable pedestal 73 indicates that the drain tank 74 is full. The water tank 71
A hose 76 is connected to the discharge port on the upper outside of the drain tank 74, and this hose 76 faces the inlet of the drain tank 74 to allow surplus water to flow into the drain tank 74.

It is also possible to drain water by connecting it to a drain, and a drain 77 provided at the outer bottom of the water tank 71 and having a cock is connected to the inlet of the drain tank 74 by a hose 78. .

The humidifying body 80 is constructed by covering a glass fiber cloth with a wire mesh or the like to form a belt shape, the lower part of which is immersed in the water tank 71, and the upper part of the humidifying body 80 covered with a wire mesh or the like.
The air is humidified by passing cooled air facing the suction area of the air.

Further, a dispersion plate 81 having an F-shape in plan view, facing the discharge cylinder 64, is vertically disposed on the lower surface of the top plate of the tank l, and this dispersion plate i81 is located at the lower edge of the discharge port 64. A large number of round holes 83 or horizontal elongated holes 83a are bored in the plate surface in the vertical direction, and the cooling air discharged from the discharge tube 64 is passed through the dispersion plate. 81 to the left and right and are guided to the inner circumferential surface of the tank 1 and pass through the large number of round holes 83 or elongated holes 83a, so that they are almost evenly distributed in the tank 1.

Numeral 85 is a ring whose surface is coated with far-infrared emitting paint, and is connected to the locking rod 9 via a hanging means such as a string 86. When this ring is buried in the grain, the grain is It adapts to the discharge and descends. This ring 85 may not be provided in some cases. 87 is a caster 6 Remove the lid 7 from the above-mentioned low temperature storage device.

The opening side of the grain bag is placed on the top plate 5 of the tank 1, and grains, etc. are introduced from the input port 4. At that time, since the top plate 5 is funnel-shaped, it can easily be thickened without leaking to the outside, and if the tank 1 is large, such as with a capacity of 500 kg or more,
The lower screen 1O has a large diameter and its outer periphery is easily deformed, making it difficult to adhere tightly to the inner periphery of the tank 1. However, by fixing the rods 23 to the outer periphery of the lower surface and providing the bent portion 28, it can be adjusted to the desired shape. It can be easily attached to the inner circumferential surface while maintaining its shape, and even if the weight of the grains, etc. is large, it can be reliably supported by the pillars 25. 6. The grains, etc. are filled according to the capacity of the tank 1. After that, when the cooler I6 is driven, the cooling air passes through the tact 67 and is ejected from the discharge cylinder 64 into the tank l, and the first dispersion plate 8! distributes the cooling air substantially uniformly in a plane.

On the other hand, the intake fan 17 sucks the ventilation chamber 15 from one side,
At that time, - the area close to the intake fan 17 will be strongly sucked, and the suction will gradually become weaker as it gets farther away, but since the area of the shielding plate 57 that closes the hole opening is increased, the area close to the intake fan 17 will be The cooling air discharged to the top is sucked out downward while cooling the grains and the like in the tank l almost evenly. Such cooling dries the grains.

Then, the air sucked and discharged by the intake fan 17 passes through the tact 68 and reaches the dustproof net 6! ] In the process of passing through the evaporator 65 to remove dust and being cooled, and being sucked in by the blower fan 66, the humidifying body 80 is humidified by the water sucked up by capillary dyeing, so that the grains, etc. Maintains moisture content.

Further, even if the tank 1 and the 1m ring path are sealed, some air still enters and exits, so the amount of dehumidification by the evaporator 65 is greater than the amount of humidification, and water corresponding to the difference between them flows into the drain tank 74.

In addition, when the temperature setting device 50 is set to an appropriate temperature range, for example, 15 to 19°C for brown rice, and the rm intermittent timer 44 is set to operate and stop, the cooler 16 operates intermittently to store the rice. Cool things to within a set temperature range.

(g) Effects of the invention The invention of claim 1 provides a cooling system that is cooled by a cooler and has a tact time of 6.
The air discharged into tank l from 7 and 68 flows between the stores contained in substantially all m tanks and also flows through the lower screen l.
O is sucked out into the ventilation chamber I5, which improves the cooling efficiency and evenly cools the inside of the tank 1 to maintain the quality of stored materials in all parts in a good condition.

The invention according to claim 2 makes it possible to firmly support the funnel-shaped body even if the tank l is large-sized by supporting the rod 23 fixed to the lower surface of the outer periphery of the funnel-shaped body by a plurality of supporting members. , and even if the member forming the funnel-shaped body is thin, the outer circumference and the inner circumferential surface of the tank l can be tightly joined.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway side view of a tank. FIG. 2 is a front view of the same as above, FIG. 3 is a plan view of same as above, FIG. 4 is a sectional view of the lower screen support part, FIG. FIG. 7 is a plan view of the same as above, FIG. 8 (fa) is a bottom view of the lower screen, and (b) is a sectional view of the same.

Claims (2)

[Claims] (1) A lower screen 10 is placed near the bottom of the tank 1 that stores agricultural products.
is provided to form a ventilation chamber 15 between the lower screen 10 and the bottom plate 3, an air outlet of a cooler 16 is connected to the upper part of the tank 1 through a cold air path, and an inlet of the cooler 16 is connected to the ventilation chamber 15. Cooler 16, cold air path and tank 1 are connected through the intake air path.
This low-temperature storage device for agricultural products is characterized in that the interior, ventilation chamber 15, and suction air path are configured as a closed circulation path. (2) When installing a funnel-shaped body having an outlet in the center near the lower part of the tank 1, a receiving rod 23 is fixed to the lower surface of the outer periphery of the funnel-shaped body, and this receiving rod 23 is attached to the lower part of the tank 1. A storage device characterized in that the storage device is supported by being placed on a plurality of support members fixed to an inner peripheral surface.