JPS60159579A - Circulation type cereal 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] In conventional circulation grain dryers that use combustible oil or gas, (a) shell cracking is likely to occur due to the high temperature of the drying air.

(b) Exhaust gas is emitted, which causes pollution, and when incomplete combustion occurs, the odor of fuel oil sticks to dry matter, and on the other hand, combustion noise causes high noise during operation, and fires occur. There is a risk of

(c) Because it uses exhaust air drying or a partial circulation drying method,
There is a large amount of heat loss due to operation while discarding heat.

2) Facilities such as fuel storage equipment for flammable oil and combustible gas, piping equipment, and accompanying safety equipment are required, and costs are incurred for replenishing and transporting fuel.

There were other drawbacks.

Therefore, in order to eliminate the above-mentioned defects, the present invention utilizes a heat pump type cooling device, and uses an evaporator to cool the humid air blown into the drying base removal chamber, condenses it, and discharges the moisture outside the machine. After dehumidifying and drying the grain, it is heated by the heat radiation of the condenser, and the heated dry air is supplied to the dry air chamber of the ventilation drying chamber of the dryer main body, and the air is circulated to dry the grain. When the moisture of the grains is absorbed into the dry air and the temperature of the dry air reaches the set temperature, the heat is exhausted by the condenser of the ventilation cooler connected to the above cooling device, and the humid air is dehumidified and dried by the evaporator. without using fuel.
This relates to a circulation type grain dryer characterized by circulating dry air at a low temperature of 100 to 40°C, thereby achieving uniform and good drying in a short period of time without causing shell cracks. .

To explain the structure of one embodiment of the present invention shown in the drawings, (1) is a dryer main body of a circulating grain dryer, and the interior includes a conditioning chamber (21), a ventilation drying chamber (3), and a take-out chamber. (4) is constructed three-dimensionally from above, and a drying air chamber (5) made of a ventilation net is provided in the ventilation drying chamber (3), and the bottom surface is formed into a V shape by the ventilation net. 5)
and the bottom of the ventilation drying chamber (3), there are grain flow channels (6) on both sides.
) and a rotary valve (
7).

On the other hand, a take-out screw conveyor (8) is provided in the middle part of the take-out chamber (4), an opening (9) is formed in the front part of one side wall, and a blower 0α is connected to the outside of the opening (9).

(Ill is a supply screw conveyor provided above the main body (1), and when the outlet of the screw conveyor (81) and the inlet of the screw conveyor A discharge gutter αJ is connected to the upper end outlet of α2, and although not shown, a switching valve is provided between the inlet of the screw conveyor oD and the upper end inlet of the discharge gutter a3, which can alternately supply grains thereto. .I
is the dry air inlet installed on the other side wall of the dry air chamber (5),
(15) is a moist air outlet provided at the rear of the other side wall of the take-out chamber (4), and (161 is a feeding funnel attached to the supply port in front of the lower end of the elevator Q21).

αn is the body of the dry air generator installed at the rear of the other side of the main body (1), and 轡 is an inverted U-shaped ventilation passage formed on one side of the body (an), and one end of the downward air passage a. The frontage is connected to the humid air outlet a9 by a bellows (2), and the opening at one end of the upper air passage (211) is connected to the dry air outlet by a bellows c2z.Then, a filter is connected to one side of the lower air passage (2). ■A suction blower (2) is installed in the middle part of the upper air passage (2).
A supply blower (to) is installed on one side of 1+. @
is a temperature sensor installed facing inside the lower air duct (27).
1 is a ventilation duct (a vacant room partitioned and installed on the other side of 119,
2) is a control panel attached to the upper front part of the cavity fin, and e9 is a temperature adjustment knob on the control panel (toward).

(al indicates the ventilation cooler installed on the aircraft αη, (to)
is the fuselage of the cooler (al), with outside air population C3 on one side end of it.
1), an exhaust port 3'IJ is formed on the other side, and a blower is provided on the other side of the body.

(b) shows a heat bong type cooling device, and 04) is its compressor, which is installed in the empty chamber. The life condenser has a reheating condenser, a cooling dehumidifying evaporator, and a waste heat condenser. (To) is the other side wall of ventilation passage a8 and reheat condenser C
9, the exhaust heat condensers C371 are each installed on one side of the fuselage.

As shown in Fig. 7, the refrigerant extrusion port of the compressor C34) and the inlet of the reheat condenser 6 are connected to the reheat condenser (c) by a pipe equipped with an electromagnetic three-way valve. Connect the outlet and the inlet of the cooling and dehumidifying evaporator with an expansion valve (41J pipe).
The outlet of the evaporator Masuda for cooling and dehumidification and the refrigerant inlet of the compressor P) are connected through a pipe (4z), and the solenoid three-way valve (to) and the inlet of the exhaust heat condenser G'71 are connected through a pipe (431). The outlet of the heat condenser 4371 and the cooling and dehumidifying evaporator (
The inlets of the expansion valves (441 and 49) are connected to each other by pipes (49).

Although not shown, a blower 241. (5), (to)
, temperature sensor (To), control panel (2), compressor (A and solenoid 3-way valve (To)). When the compressor (to) starts operating and the temperature of the dry air in the main body (1) and ventilation chamber ae reaches the set temperature, the electromagnetic three-way valve ( (to) is switched from the pipe G9 side to the pipe 03 side, and constitutes an electric circuit in which the blower @ starts operating.

Next, its effect will be explained. After starting the operation of the dryer, the grains are put into a funnel a and fed into the main body +11 via an elevator Q21 and a screw conveyor aυ.
If the grains are stopped from being fed into the funnel αe when a predetermined amount has passed from the drying chamber (3) to the tempering chamber (2) in the main body (1), then the drying chamber (3) and the tempering chamber (2) can be stopped. ) The grains in
As the rotary valve (7) rotates, it gradually descends from the inside of the conditioning chamber (2) through the flow path (6) of the drying chamber (31) and enters the take-out chamber (4) from the lower end of the drying chamber (3). , and is returned to the main body (1) via the screw conveyor (8), elevator Q3, and screw conveyor (111), and circulates within the main body (11).

On the other hand, turn on the control panel (2) to start operating the dry air generator, and then turn the knob (to) to set the predetermined temperature within 10°-40°C depending on the grain. (5) Initially, due to the operation of the compressor (2), the refrigerant is
As shown by the solid line arrow in the figure, the compressor passes through the electromagnetic three-way valve (2) and pipe C39, is press-fitted into the condenser (c), and is radiated from the condenser. ]l
, through the expansion valve (4υ) to reach the evaporator, evaporate and cool the evaporator, and then return to the compressor (2) through the pipe (42).

On the other hand, when the blower (2414) is operated, the air inside the main body (11) and the airframe aD is circulated through the drying chamber (3), the take-out chamber (4), and the ventilation passage Q8 as shown by the arrow in FIG. The humid air that has passed through the grains that descend sequentially in the flow path (6) from the chamber (5) and reached the take-out chamber (4) passes through the outlet (151) and the filter ■, where it is dust-removed and sent downward. It is sucked into the air passage a9.

Therefore, the above-mentioned intake air flows through the ventilation passage α and the other side wall of the evaporator (
3) The air branches off into the space between the evaporator (■) and the condenser (2), and the air that advances into the space between the other side wall of the ventilation passage Q8 and the evaporator (G) flows through the evaporator (G). The air is cooled and condensed as it passes through the evaporator, and the moisture is discharged outside the aircraft αη, and the air is dehumidified and dried until the relative humidity in the atmosphere reaches 20 to 25 cm, and then passes through the evaporator and condenser ( g), and is combined with the humid air that advances directly into the space.

The air, which has been appropriately dehumidified and dried, passes between the condensers and is warmed as it passes through the condensers, and the heated dry air passes through the upper air passage c! Through D, enter the air chamber (
5) The grains are dehumidified and dried as they pass through the grains in the flow path (6), and the above actions are repeated sequentially while the air is circulated and the grains are circulated and dried. It will be done. On the other hand, the temperature of the circulating dry air gradually increases as time passes.

In addition, at the beginning of the work, if the exhaust fan aα is operated, the dust mixed in the grains and blown into the extraction chamber (4) will be suctioned by the exhaust fan 0Q and discharged to the outside of the main body (1). It is possible to remove dust from inside the main body (1). Thereafter, when the operation of the exhaust fan 00) is stopped, the circulation drying operation described above is performed.

(B) When the temperature of the circulating air reaches the set temperature, the temperature sensor Qθ automatically switches the electromagnetic three-way valve (to) to the pipe (43 side) and the blower (
) starts operation.

Therefore, as shown by the dotted line arrow in Fig. 7, the refrigerant passes from the compressor, through the electromagnetic three-way valve (to), to the pipe (113), and is pressurized into the condenser (3p), where the heat is radiated from the condenser Gn. ,
Next, it passes through the pipe (c) and the expansion valve (converter) into the evaporator, where it evaporates and cools the evaporator (2).
2 and returns to the compressor (goods).

On the other hand, the outside air is inlet (31) by the operation of the blower (to).
The exhaust gas is sucked into the fuselage (to) and passes through the condenser C371, and as it passes through the condenser Gn, the condenser C371 is cooled, and the heated exhaust gas is passed through the outlet G2 to the fuselage (
3o) Released outside.

Therefore, the condenser (g) is closed so that no refrigerant passes through it, and the air circulating inside the main body (1) and the aircraft body aη is kept in the evaporator (g).
The temperature of the circulating air gradually decreases because it is only cooled and condensed as it passes through the air and is not heated.

(Q) When the temperature of the circulating air drops to the set temperature, the electromagnetic 3
The direction valve □□□ is switched to the pipe C31 side, and the above operation (5) is performed.

Thereafter, the above actions are automatically repeated one after another, and the flow path (6)
The drying effect is performed by passing dehumidified dry air of uniform temperature at a constant speed.

At that time, by rotating the knob (to), the circulating air temperature in the main body (11 and fuselage (17)) can be adjusted to 106 to 40.
It can be freely adjusted and set within the range of °C.

Since the circulation type grain dryer of the present invention is configured as described above, (a) the temperature of the drying air is low in the range of 106 to 40°C, so there is no sudden temperature change and there is little occurrence of shell cracking.

(b) In addition to the high dehumidification efficiency of dry air, the drying time can be significantly shortened by heating the dry air, and when the temperature of the dry air reaches the set temperature, the refrigerant is automatically turned on. Switching to the condenser of the ventilation cooler, the heat is exhausted outside the machine, and the dry air is only cooled and condensed by the evaporator, so drying is performed with dehumidified dry air at a uniform and appropriate temperature throughout, improving work efficiency.

e] Since no flammable oil or gas is used, there is no pollution caused by exhaust gas, there is no combustion noise, the noise during operation is low, and the operating temperature is low (maximum 40 degrees Celsius) (and there is no risk of fire occurring). There is very little danger, and you can leave the car running with confidence.

2) Since dry air is constantly circulated during operation, heat loss is extremely low, and the only heat source is electricity, reducing costs for fuel storage equipment, piping equipment, fuel supply and transportation, and associated safety equipment. can.

(e) Not only can continuous operation be achieved by simply setting the temperature and turning on the switch, the temperature of the drying air can be arbitrarily set to a temperature suitable for drying the grains, and the amount of water discharged from dehumidification can be used to dry the grains. It is easy to operate, manage and handle.

(f) One beat pump type cooling device performs both cooling and heating of dry air, so it can be configured easily.

There are other effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of a circulating grain dryer showing one embodiment of the present invention, Fig. 2 is a side view of the same, and Fig. 3 is 1-1 in Fig. 2.
Line sectional view, Figure 4 is a 1m-II line sectional view of Figure 3, Figure 5
The figure is a sectional view taken along the ■-■ line in Figure 3, and Figure 6 is a cross-sectional view of I'V in Figure 3.
-IV line sectional view and FIG. 7 are piping diagrams of the beat pump type cooling device.

Claims (1)

[Claims] The side wall of the main body of the dryer, which has a conditioning chamber, a ventilation drying chamber, and a take-out chamber arranged three-dimensionally from above to circulate grain, has an air inlet facing a drying air chamber installed in the ventilation drying chamber.
and an air outlet facing the extraction chamber, the air outlet and the air inlet are communicated through a ventilation passage, and a blower is provided in the ventilation passage, and an evaporator and a condenser of a heat pump type cooling device are installed in parallel at appropriate intervals. The condenser installed in the ventilation cooler outside the machine and the above cooling device are connected by a pipe circuit with a three-way electromagnetic valve, and a temperature sensor is installed at an appropriate location inside the dryer body with ventilation ducts. Between the above electromagnetic 3-way valve and the temperature control control panel, when the temperature of the dry air reaches a predetermined temperature, the electromagnetic 3-way valve operates from the condenser side in the above ventilation path when the temperature sensor detects the temperature. A circulating grain dryer characterized by forming an electric circuit that switches to the condenser side of the ventilation cooler.