JPH0493587A - Dehumidifying and drying machine - Google Patents

Abstract

PURPOSE:To remove dusts within a drying part, eliminate a non-uniform drying, and provide a low running cost and reduce noise by a method wherein an air discharging means is controlled to be in its operated state under an action of a circulating means and the air discharging means is controlled to be stopped under a stopped state of the circulating means. CONSTITUTION:A control means E comprises the first control device 14 entirely controlling a dehumidifying and drying machine and the second control device 28 for controlling an air feeding means B. The first control device 14 controls a changing-over of a circulating means D between its active state and its stopped state. It controls operation of an air discharging means C in order to cause the air discharging means C to be active in an operated state of the circulating means D and the air discharging means C to be stopped in stopped state of the circulating means D. The second control device 28 controls driving of a heat pump circuit, the first blowing fan 16, the second blowing fan 19 and dampers 24, 25 in an air feeding means B in response to a detected information of each of the sensors 29 and 30. In a stopped state of the circulating means, a non-uniform drying state is eliminated, a running cost is restricted low and then noise is reduced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a dehumidifying dryer, and more specifically, the present invention relates to a dehumidifying dryer, and more specifically, a drying section that accommodates grains to be dried, and a drying section that sends dehumidified air for drying to the drying section. an air supply means, an exhaust means for sucking and discharging the air in the drying section, a circulation means for circulating and moving the grains in the drying section, and a control means for controlling the circulation means to switch between an operating state and a stopped state. The present invention relates to a dehumidifying dryer equipped with a dehumidifying dryer.

[Conventional technology]

In such a dehumidifying dryer, the grains in the drying section are dried by the dehumidified air sent out from the air supply means, and in order to achieve uniform drying, the grains are circulated and moved by the circulation means. It looks like this. In order to save energy, etc., the circulation of the grains is
This is performed intermittently by switching control between an operating state and a stopped state of the circulation means using the control means.

Conventionally, the exhaust means was maintained in an operating state regardless of whether the circulation means was switched between an operating state and a stopped state.

[Problem to be solved by the invention]

When the exhaust means is put into operation while the circulation means is in a stopped state, a certain air path is created in the drying section by the combined action of air blowing by the air supply means and suction and discharge by the exhaust means. Therefore, there is a problem in that the degree of drying becomes uneven between the grains stored in the position of the air path and the grains stored in the position outside the air path.

The present invention has been made in view of the above circumstances, and its purpose is to eliminate the problem of uneven drying while removing dust from the drying section, as well as to reduce running costs and noise. The object of the present invention is to provide a dehumidifying dryer that can also achieve the following.

[Means to solve the problem]

A characteristic configuration of the dehumidifying dryer of the present invention is such that the control means puts the exhaust means in the working state when the circulating means is in the working state;
Further, when the circulation means is in a stopped state, the exhaust means is brought into a stopped state and the operation of the exhaust means is controlled, and its functions and effects are as follows.

[For production]

The amount of dust generated in the drying section tends to be larger when the grains are circulated than when the grains are not circulated. Accordingly, the present invention provides control using the control means to bring the exhaust means into operation when the circulation means is in operation, thereby accurately discharging a large amount of dust, and yet when the circulation means is in a stopped state, the exhaust means is in the operation state. Stop the exhaust means. As a result, in the stopped state, it is possible to prevent the formation of a certain air path in the drying section, which has conventionally occurred.

Moreover, in the stopped state, the exhaust means is stopped, so the driving energy thereof is not required, and noise is also reduced.

〔Effect of the invention〕

In this way, when the circulation means is in a stopped state, it is possible to prevent the formation of the fixed air path in the drying section, and the conventional problem of non-uniform drying caused by the presence of the air path is solved. It becomes like this.

Furthermore, in the stopped state, the exhaust means is stopped and its driving energy is no longer necessary, so that the running cost of the dehumidifying dryer can be kept as low as possible. In addition, noise is also reduced and the environment is improved.

[Second Characteristic Configuration of the Present Invention] A second characteristic configuration of the dehumidifying dryer of the present invention is such that the control means maintains the operating state of the circulation means for a predetermined period of time and controls the stopping state of the circulation means as desired. The point is that it is configured to perform temporal control by repeating maintenance over a period of time.

According to such a dehumidifying dryer, in addition to the control of switching the circulation means between an active state and a stopped state, the time-dependent control can be performed. It also has the effect of improving sex.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 1, the dehumidifying dryer of the present invention includes a drying section (A) that accommodates grains to be dried, and an air supply means (B) that sends dehumidified air for drying to the drying section (A). ), an exhaust means (C) that sucks and discharges the air in the drying section (A), and a circulation means (D) that circulates and moves the grains in the drying section (A).
) and a control means (E) for controlling the circulation means (D) to be switched between an active state and a stopped state. The drying section (A) and the air supply means (B) are connected via a duct (1) so that they can be combined and separated.

A storage space (SP) for storing grains for drying is formed inside the drying section (A), and in the storage space (SP), a plurality of ventilation channels ( 2) is formed.

Above the storage space (SP), there is provided an equalizer (3) that supplies the grains in an evenly distributed manner, and below the equalizer there is a rotary machine that discharges the grains little by little from the gap between the inclined plates (4). A valve (5) is also provided. This storage space (SP)
, the grains supplied little by little from the equalizer (3) and the grains discharged little by little by the drive of the rotary valve (5) are balanced, and the grains as a whole are at the top. Although the height level exceeding the ventilation passage (2) is maintained, each grain gradually moves downward.

The ventilation path (2) is connected to the air supply frame (2a) and stores the dehumidifying air from the air supply means (B) into a storage space (SP).
There are two types: one that blows out air to the exhaust frame (2b), and one that is connected to the exhaust frame (2b) and sucks and exhausts air from the storage space csp> by suction by the exhaust means (C), and both have a chevron-shaped frame that is open at the bottom. is located in the stored grain.

The air supply means (B) has two ventilation passages (17
), (20), and the upper first ventilation duct (
17) has a condenser (15) and a first ventilation fan (16), and a lower second ventilation passage (20) has an evaporator (18).
and a second blower fan (19) are provided, respectively. Furthermore, the second ventilation passage (20) is also provided with a compressor (27), which is connected to the condenser (15) and the evaporator (18).
) and an expansion mechanism (not shown) constitute a heat pump circuit.

The exhaust pressure port (21) of the first ventilation path (17) is connected to the duct (1), and the Wc2 ventilation! ! The outlet (22) of (20) communicates with the outside, and the first ventilation passage (22) communicates with the outside.
17) and the second ventilation path (20) are in communication via a ventilation port (23). The ventilation port (23) and the discharge port (22) are connected from the second ventilation path (20) to the first ventilation path (
damper (17) as a means of adjusting the amount of air flowing to
24) and (25) are provided. These dampers (24) and (25) are configured to be opened and closed simultaneously and in reverse by driving one electric motor (26). That is, when the damper (24) is fully open, the damper (25) is fully open, and in this state, all of the dehumidified air that has been cooled and dehumidified in the evaporator (18) flows through the first vent (23). It is now added to the ventilation path (16). Therefore, the dehumidified air is sent to the duct (1), and the dehumidified air is further sent to the drying section (A), so that the air supply means (B) supplies the dehumidified air to dry grains. The drying section (A) has the function of sending the liquid to the drying section (A) for drying purposes. On the other hand, the damper (24)
When the damper (25) is fully open, the damper (25) is fully closed, and all of the air cooled and dehumidified by the evaporator (18) is discharged to the outside, and the air is heated by the condenser (15) and sent to the duct (1). Only air that has been removed will be pumped in.

The exhaust means (C) specifically includes the exhaust frame (2b
) for suctioning and discharging humid air in the storage space (SP) to the outside; It is equipped with a dust removal device (11) that sucks and discharges floating dust to the outside.

Specifically, the circulation means (D) is arranged below the rotary valve (5), and the rotary valve (5)
a lower screw conveyor (6) that conveys grains discharged from the storage space (SP) at appropriate time intervals by intermittent drive to the opposite side to the arrangement position of the air supply means (B); an elevator (7) that is arranged vertically along the side of the storage space (SP) and lifts the grains conveyed by the lower screw conveyor (6); It is equipped with an upper screw conveyor (8) that conveys the grains lifted by the elevator (7) to the upper center of the drying section (A) where the equalizer (3) is located.

The grains conveyed by the upper screw conveyor (8) are transferred to the storage space (3) by the equalizer (3).
SP) is evenly radiated from above.

When the grains are circulated using the circulation means (D), the grains pass through the space above the storage space (SP) over time before reaching the ventilation path (2). As a result, the grains are subjected to tempering and drying in the space above.

In addition, in the upper part of the drying section (A), the storage space (SP
) is provided with a fullness meter (9) for detecting whether or not the grains are stored at full capacity, and a fullness meter (9) is provided at the bottom of the meter to detect whether or not the grains are stored in the storage space (SP) at a full capacity. A grain thermometer (41) for detecting grain temperature is provided, and a hopper (41) for supplying grains into the drying section (A) is provided on the other side.
12) and a single grain moisture meter (13) for measuring the moisture content of grains stored in the storage space (SP).

Moreover, the white arrows in the drying section (A) and the air supply means (B) indicate the flow of air. Further, at an appropriate position in the duct (1), there is a blowing thermometer (42) for measuring the temperature of the air flowing therethrough, and a blowing air thermometer (42) for heating the flowing air as necessary (for example, in a cold region). In,
A heater (43) is provided to heat the air heated by the heat pump in the air supply means (B) when simply adding the air to the drying section (A) is insufficient for heating. .

Specifically, the control means (E)
The first unit is installed at the bottom of the dehumidifying dryer and controls the entire dehumidifying dryer.
a control device (14); and a second control device (14) provided above the air supply means (B) and controlling the air supply means (B).
28).

The first control device (14) performs control to switch the circulation means (D) between an operating state and a stopped state, and also puts the exhaust means (C) into an operating state when the circulation means (D) is in an operating state. , and in order to bring the exhaust means (C) into a stopped state when the circulation means (D) is stopped, the exhaust means (C)
). Moreover, the first control device (14) also performs control to repeatedly maintain the operating state of the circulation means (D) for a predetermined time and maintain the stopped state for a predetermined time. It has become.

On the other hand, a temperature sensor (29) for detecting the dry bulb temperature of the outside air and a humidity sensor (30) for detecting the humidity of the outside air are provided above the second control device (28). Then, the second control device (28) controls both the sensors (29), (
Based on the detection information of 30), the heat pump circuit, the first ventilation fan (16), and the second
It controls the driving of the blower fan (19), dampers (24), (25), etc.

In both the control devices (14) and (28), the second
Various operation units provided on the control panel (40) shown in the figure,
More specifically, the first operation section (1') for selecting grains is used.
4-OA), a second operation section (40B) for setting drying conditions/displaying operating status, and a third operation section (40C) for issuing operation commands by manually inputting various commands. control is being carried out.

To explain further, the first operation section (40A) is provided with a selection button (31), and each time the selection button (31) is pressed, the type of grain selected changes (the display changes). (displayed on the character display section immediately above the selection button (31)).

In addition, in the second operation section (40B), there is a switching button (32) in the center or a setting button (33) in the left end.
However, a moisture measurement button (34) is provided at the right end. Then, when the switching button (32) is pressed, the setting drying conditions or the operating status display can be selected (
This is displayed on the character display section immediately above the selection button (31) or the moisture measurement button (34). Furthermore, once the drying conditions have been selected as described above, the specific settings for the drying conditions can be determined by pressing the setting button (33) and clicking the button next to the setting button (33). Elevation command button (3
5), the elevation is set digitally (the display is displayed on the digital display immediately above the switching button (32)). Further, in a state where the selection of the driving status display is performed as described above, the display of the driving status is also displayed on the digital display section. In addition, the moisture measurement button (34)
When is pressed, the moisture value measured by the moisture meter (13) is immediately displayed on the digital display section.

In addition, the third operation section (40C) includes a tensioning operation/display section (35), a drying operation/display section (36), a drying end display section (37), a discharging operation/display section (38), and a stop operation/display section (36). The operation/display units (39) are arranged in that order from the left. And each of the above-mentioned operation/display sections (35), (36)
, (38), and (39), command signals for the respective operations are input. Incidentally, during automatic operation, simply by pressing the stakeout operation/display section (35), the operation will continue automatically. In addition, each display section (35), (36), (37),
At (38) and (39) (more specifically, at an attached lamp just above each button), the current stage of the operation is displayed.

When dehumidifying and drying grains using such a dehumidifying dryer, automatic control is performed by the control means/R) according to the following procedure.

First, press the loading operation/display section (35) to transfer the grains to the storage space (SP) in the drying section (A) into the hopper (12).
) while supplying the grains to the circulation means (D).
Circulate using. In this state, the storage space (SP
) continues until it is confirmed by the filling needle (9) that the grains in the container are full.

Next, when the storage space (SP) becomes full of grains,
The operation then shifts to drying the grain. The drying operation is a cycle operation in which the control means (E) is used to repeatedly maintain the operating state of the circulation means (D) for a predetermined time and maintain the stopped state for a predetermined time. It is done by executing. Furthermore, by using the control means (E), when the circulation means (D) is in operation, the exhaust means (C) is put into operation, and when the circulation means (D) is stopped, the exhaust means (C) is stopped. In order to achieve this state, the operation of the exhaust means (C) is controlled.

The cycle operation mode includes a normal mode (for example, 12 hours/l circulation) and an end mode (for example, 4 hours/1 circulation). Further, the timing of changing the drying mode of the grains and the completion state of drying of the grains are confirmed based on the results of actually measuring the moisture content of the grains after each cycle of the cycle operation is completed. Then, when the actual moisture measurement result exceeds the target value by a predetermined value during normal mode operation, the normal mode is switched to the end mode,
In addition, in the termination mode, it is determined that the drying is completed only when the actual moisture measurement result reaches the target value twice, and at that point, the drying operation is terminated and the grains are completely dried. Grain ejection is done.

[Another example]

The control means (E) controls switching of the circulation means (D) between an operating state and a stopped state, and controls the operation of the exhaust means (C), but controls the operation of the circulation means (D). It is also possible to consider an embodiment in which the control of repeatedly maintaining the active state for a predetermined period of time and maintaining the stopped state for a predetermined period of time is not executed, and the control is performed by a manual command.

It should be noted that the present invention is not limited to the structure of the attached drawings by adding or writing numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the dehumidifying dryer according to the present invention, and FIG. 1 is a longitudinal sectional side view showing its overall configuration, and FIG. 2 is a front view showing a control panel of its control means. (A)...Drying section, (B)...Air supply means, (C)...Exhaust means, (D)...
Circulation means, (E)... Control means.

Claims (1)

[Claims] 1. A drying section (A) that accommodates grains to be dried, and an air supply means (B) that sends dehumidified air for drying to the drying section (A).
), an exhaust means (C) for sucking and discharging the air in the drying section (A), a circulation means (D) for circulating and moving the grains in the drying section (A), and the circulation means (D) A dehumidifying dryer comprising a control means (E) for controlling switching between an operating state and a stopped state, wherein the control means (E) controls the exhaust means (E) when the circulating means (D) is in an operating state. dehumidifier configured to control the operation of the exhaust means (C) so that the exhaust means (C) is in the operating state and the exhaust means (C) is in the stopped state when the circulation means (D) is in the stopped state; Dryer. 2. The control means (E) is configured to repeatedly maintain the operating state of the circulation means (D) for a predetermined time and maintain the stopped state for a predetermined time. The dehumidifying dryer according to claim 1.