JPH0240471A - Humidifying device in low-temperature storage device - Google Patents

Abstract

PURPOSE:To prevent stored materials from being brought into over-drying condition without necessitating any special humidifying device by a method wherein cooled air, discharged into a tank, is humidified by a humidifying body utilizing water condensed in an evaporator as a water source. CONSTITUTION:A tank 1, filled with stored materials, is communicated with a cooler 16 through a duct 67. The frame body 58 of the cooler 16 is provided with a water tank 71 at the intermediate part of the side plate thereof and a water collecting hopper 72, provided at the lower part of an evaporator 65, is led into one side of the water tank 71. The lower part of a humidifying body 80 is dipped into the water tank 71 while the upper part of the same is led into the suction area of a ventilating fan 66 to humidify cooled air by passing it through the suction area. According to this constitution, the stored materials in the tank 1 are cooled by the humidified cooling air whereby the materials will never be brought into over-drying condition and any special humidifying device may not be necessitated since water, condensed in the evaporator 65, may be utilized as a water source.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a humidifying device in a low-temperature storage device for storing brown rice, paddy, beans, vegetables, etc., which dry when cooled.

(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 passage is formed between the openings and the cooling air mainly flows through the front air distribution passage to cool the stored items in the inner box is disclosed in Japanese Utility Model Application Publication No. 57-79374. is already known.

(c) Problems to be solved by the invention Among the known low-temperature storage devices mentioned above, the former cools the upper layer of rice stored in the tank, but it is difficult to cool the lower layer, and the lower layer of rice is cooled. There is a problem that the closer it gets to the extraction part, the higher the temperature and the deterioration of quality, resulting in poor taste.
In addition, the latter is configured so that some of the cooling air flows inside the inner box, but when the inner box is filled with grains, etc., this creates resistance and hardly flows, and most of the cooling air does not flow inside the inner box. Since the cooling air flows through the air path formed between the inner and outer boxes, the grains in the inner box are indirectly cooled through the inner box wall material, which improves cooling efficiency. is low and
It was difficult to cool the center and it was not possible to store the entire product in a uniformly cooled state.

In addition, both the former and the latter have the problem that if the stored material is cooled to maintain a low temperature, it will dry out and deteriorate in quality, and if a separate humidifier is added to solve this problem, it will become larger. At the same time, a new problem arises in that the cost becomes significantly high.

(D) Means for Solving the Problems The present invention connects one end and the other end of a tank l for storing agricultural products to the air outlet and suction port of the cooler 16 through an air path, and configures them into a closed circulation path. A water tank is provided below the evaporator 65 of the cooler 16 to receive water dripping from the evaporator 65, and the lower part of the humidifying body 80 having water absorbing properties is connected to the water tank 7.
The above-mentioned problem was solved by immersing the device in the cooling air and allowing the upper part to enter the cooling air path and humidifying the cooling air.

(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 upper part of the tank, and at the same time the lower air chamber is sucked, so the cooling air flows downward between the stored items in the tank. The stored items can be directly cooled by circulating cooling air in the upper and lower parts of the tank, as well as in the center and outer periphery.

Also, when the cooling air circulates between the cooler and the tank, when it passes through the evaporator, some of the water vapor in the cooling air becomes water droplets that flow into the water tank and are stored. This humidified cooling air is sucked up by capillary action and humidified into the cooling air, and this humidified cooling air cools the stored items in the tank, so they never become overly dry.

(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 top plate 5 that is funnel-shaped and gently sloped toward the input port 4, and the peripheral wall 2 includes an inner and outer cylindrical body 2a,
A heat insulating material 6 is interposed between the lid 7 and the screw 8 with a knob, which is rotatably inserted into the center of the lid 7 that fits into the slot 4 so as not to advance or retreat. It is screwed into the threaded hole of the locking rod 9 installed in the lid 7, and a rubber gasket is glued to the lower surface of the outer periphery of the lid 7, so when the M7 is fitted into the inlet 4 and the screw 8 is tightened, the lid 7 is sealed. Ru.

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 a discharge outlet is provided in one example. 12, and the outlet 12 is made airtight by being pressed against the upper surface of the rim of the outlet bored in the bottom plate 3 as shown in FIG. The space surrounded by the peripheral 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 the figure.

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 mounting plate 22, and a suitable plate is placed on the upper surface of the outer circumference of the bottom plate 3 and the inner circumference of the lower part of the tank 1. A large number of pillars 25 are superimposed at regular intervals, and bolts 26 are inserted into the base plate and bottom plate 3 of the pillars 25, and screwed into fixing nuts 27.・
・The elliptical rods 23 made of a series of round rods fixed to the lower surface of the outer periphery of the lower screen 10 are placed on the fourth As shown in the figure, the lower screen IO is supported in a placed state, and since the outer peripheral edge of the lower screen IO is a bent portion 28 that is bent or curved diagonally upward, the lower screen IO can be inserted from above and received. The rod 23 is the pillar 25.
- When placed on top, the bent portion 28 is pressed against the inner circumferential surface of the tank l and comes into close contact with it, and when the tank l becomes large, the lower screen lO
Although it is easy to deform, it can be accurately supported in a fixed posture. In addition, the pillars 25 and 2 of the inner cylindrical body 2a are
A step portion protruding inward can be provided at a portion corresponding to the upper part of . to support the lower screen in the same manner as the above-mentioned 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. The lower partition plate is urged to be pressed against the upper surface of the lower part of the guide plate 30, and ii
A sliding shutter 38 is provided above the continuous extraction passage 37 formed between the side plates of the cylindrical body 29 of the guise plate 30, and this sliding shutter 38 is linked 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.
1 is inserted, a first stopper 42 consisting of a protrusion corresponding to the groove is provided, and a second stopper 43 is provided adjacent to the first stopper 42. Further, an intermittent timer 44, a switch 45.
46, an indicator light 47, etc., are screwed onto the plate 48, a temperature setting device 50 is provided on the side of the operation lever 39, and a cleaning lid 51 is removably attached to the top with screws. A flow suppression plate 52 with a square cross section is installed above the discharge port 12 using support rods 53 to prevent grains, etc. from flowing out all at once.
It is attached to the duct 68 that connects the intake fan 17 and the cooler 16.

On the lower surface of the lower screen 10, 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 area of the lower screen 10 is approximately proportional to the distance from the intake port 17a of the intake fan 17 between the chevron protrusions 56. A fan-shaped shielding plate 57 with an area of The number of holes 11 is increased in areas where the pressure is weaker, so that any part of the lower screen 10 can 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 l 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 17.
8, a dustproof net 69 which is removable and has a handle is interposed therebetween.

In addition, an outer lid 70 is attached to the middle part of the side plate of the frame body 58.
A water tank 71 is provided which is removably locked at the evaporator 65, and a water collection funnel 72 provided at the bottom of the evaporator 65 is placed facing one example of the water tank 71 to collect water condensed by the evaporator 65. A drain tank 74 is mounted 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 fills the drain tank 74. A hose 76 is connected to the discharge port on the upper part of the outside of the water tank 71, and the water is discharged after the water is discharged by an alarm.
is provided at the bottom of the outside of the water tank 71 so that surplus water can flow into the drain tank 74 by facing the inlet of the drain tank 74, or can be drained by connecting to a drainage ditch. A drain 77 with 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 and forming it into a band shape.The lower part of the humidifying body 80 is immersed in the water tank 71, and the upper part is exposed to the suction area of the blower fan 66. It is designed to humidify by passing cooling air through it.

Further, on the lower surface of the top plate of the tank 1, a dispersion plate 81 is vertically disposed, facing the discharge cylinder 64 and having an F-shape in plan view. It has a bent part 82 toward the edge, and a large number of round holes 83 or horizontal long holes 83a are bored in the vertical plate surface, so that the cooling air discharged from the discharge tube 64 is dispersed. The particles are guided to the inner circumferential surface of the tank 1 by being guided to the left and right by the plate 81, and pass through the large number of round holes 83 or elongated holes 83a, so that they are almost evenly distributed within 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 J blowfish 85 may not be provided. 87 is a caster.

In the above-mentioned low-temperature storage device, the lid 7 is removed, 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 this time, since the top plate 5 is funnel-shaped, it can easily flow into the tank without flowing out.
If the lower screen 10 is large, such as with a capacity of 500 kg or more, the diameter of the lower screen 10 will be large and its outer periphery will be easily deformed and it will be difficult to fit tightly to the inner periphery of the tank 1, but it is necessary to fix the rod 23 to the outer periphery of the lower surface. By providing the bent portions 28, it is easy to bring the grains into close contact with the inner circumferential surface while maintaining a predetermined shape, and even if the grains are heavy, they can be reliably supported by the supports 25.

After filling the tank l with grains etc. according to the capacity, when the cooler 16 is driven, cooling air is ejected from the discharge pipe 64 through the duct 67 into the tank l, and the dispersion plate 81 distributes the cooling air into a flat surface. Distribute it almost evenly.

On the other hand, the intake fan 17 sucks the ventilation chamber 15 from one side,
At that time, the parts near the intake fan 17 are strongly sucked,
Although it gradually becomes weaker as it gets farther away, the areas of the shielding plates 57 that close the holes 11 are made larger, so all parts are sucked in almost equally, and the cooling air discharged to the top. The grains, etc. in the tank 1 are cooled substantially uniformly while descending and are sucked out into the ventilation chamber 15, and when such cooling is performed, the grains, etc. are dried.

The air sucked and discharged by the intake fan 17 passes through a duct 68, a dustproof net 69, and an evaporator 65, where it is removed from dust and cooled. Since the water sucked up is humidified by this phenomenon, grains and the like are kept at a substantially constant moisture content.

Further, even if the tank 1 and the circulation 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.

Next, to explain temperature control, Fig. 9 shows the control circuit, where S is the earth leakage breaker, 1SSJ is the operation switch, TH is the thermostat, WL is the power lamp,
SS2 is a timer switch, TM is an intermittent timer that sets the operating time and stop time, X is a driving relay, GL
is the operation lamp, VFM is the intake fan 17 relay, LS
is the pressure sensitive switch 75.75c is the full water relay, UFM is the motor 6 that drives the cooling fan 63 and the ventilation fan 66.
2 relay, RL is full water lamp, B is buzzer, CM is compressor 60 relay, 51c is compressor 6
0 is an over relay, and 52c is a full water over relay.

Since the thermostat TH and intermittent timer TM are inserted in parallel, switch the timer selector switch SSZ to the left contact in the figure and set the temperature setting device 50 to the appropriate temperature range, for example 15 to 19°C for brown rice (storage When the operation switch SS is turned ON after setting the operation switch SS (varies depending on the type of object), the operation relay X is also turned ON, and the intake fan 17,
The motor 62 and compressor 60 are started, and the intake fan 17 sucks in the ventilation chamber 15 and sends air through the duct 68 to the cooler 16 . The liquid is discharged from the discharge cylinder 64 into the tank l through the duct 67. At this time, as mentioned above, when cooling the air, the evaporator 65 condenses a part of the water vapor in the air to form water droplets, which drip into the water collection funnel 72 and flow into the water tank 71, but in the initial stage of cooling. Since the humidity in the air and the moisture content of the stored material are high, many water droplets are generated and there is no need to humidify, so the water is allowed to flow into the drain tank 74 from the drain 77.
The temperature inside the tank l changes from T, (e.g. 30°C) to the set temperature 15°C during the initial H# time as shown in Figure 10.
The thermostat is activated and each device is stopped. During this period, if the hose 76 is removed from the drain tank 74 during operation, connect it to the drain tank 74 as shown in the figure, and thereafter, when the temperature sensor 55 detects the upper limit temperature, each device is activated to cool the inside of the tank l. , it will stop when the lower temperature limit is reached.

Next, to explain another cooling method, when the timer selector switch SS4 is switched as shown by the solid line in FIG.
As the intake fan 17 and the like repeatedly operate and stop as shown in FIG. 1, the temperature inside the tank decreases step by step, and it takes 82 hours, which is longer than H1, to reach the appropriate temperature range. During this period, grains, etc. gradually decrease in a state where the temperature difference and moisture content difference between the surface layer and the deep layer are small, and from then on, the intermittent timer 44
It operates intermittently according to the set time, and when the lower limit temperature is reached during that time, the thermostat TH turns OFF, so the timer T
When the M circuit turns OFF and all parts stop, and the temperature sensor 55 detects the upper limit temperature, the thermostat TH turns ON.
After that, the intermittent timer 44 is activated and each part operates intermittently until the lower limit temperature is reached.

(G) Effects of the Invention As described above, the present invention connects one end and the other end of the tank l for storing agricultural products to the air outlet and the intake port of the cooler 16 through an air path, and configures them into a closed circulation path. A water tank is provided below the evaporator 65 of the cooler 16 to receive the water dripping from the evaporator 65, and the lower part of the humidifier 80 having water absorption properties is immersed in the water tank 71, and the upper part enters the cooling air path. When the cooling air passes through the evaporator 65, it is dehumidified and dried, but the water that drips from the evaporator 65 and accumulates in the water tank 71 is sucked up by the humidifying body 80 and transferred to the tank I. This will humidify the cooling air discharged to
It is possible to prevent stored materials from becoming overly dry.

Moreover, since the water condensed by the evaporator 65 is stored in a water tank and used as a water source, and the humidifier 80 humidifies the cooling air, a special humidifying device is not required, and the entire structure can be made compact. It can be obtained at low cost, and the work of supplying water for humidification can be omitted, and the work of draining water can be reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view of the tank, Fig. 2 is a front view of the same, and Fig. 2 is a partially cutaway side view of the tank.
FIG. 3 is a plan view of the same as above, FIG. 4 is a sectional view of the lower screen support part, FIG. 5 is a side view with a part of the cooler cut away, FIG. Figure 8 (a) is a bottom view of the lower screen, (b) is a cross-sectional view, Figure 9 is a control circuit diagram, Figure 1O is a time chart for controlling with a thermostat, and Figure 11 is a diagram using a thermostat and an intermittent timer. teIl+
FIG. l...tank, 3...bottom plate, lO...bottom screen, 12...discharge port, 15...ventilation chamber, 16...cooler, 17...
Intake fan, 23...receptacle, 25...post, 28...bending part, 44...intermittent timer, 50...temperature setting device, 5
5...Temperature sensor, 56...Chevron protrusion, 57...Blocking plate, 65...Evaporator, 66...Blower fan, 67, 6
8...Duct, 71...Water tank. 72...Water collection funnel, SO...Humidifier, 81...Dispersion plate (Figure J, Figure f, Figure 7, Figure C)

Claims (1)

[Scope of Claims] One end and the other end of a tank 1 for storing agricultural products are connected to an air outlet and an inlet of a cooler 16 by an air passage to form a closed circulation path, and the evaporator 65 of the cooler 16
A water tank is provided at the bottom of the evaporator 65 to receive the water dripping from the evaporator 65, and the lower part of the water-absorbing humidifier 80 is immersed in the water tank 71, and the upper part enters the cooling air path to humidify the cooling air. A humidifier in a low temperature storage device characterized by: