RU51184U1 - DEVICE FOR RESEARCH OF DRYING MODES OF AGRICULTURAL PRODUCTS OF PLANT ORIGIN - Google Patents

Abstract

The utility model relates to the drying of grain and other agricultural products of plant origin and can be used to study and determine optimal drying conditions using infrared radiation (IR drying). The objective of the utility model is to increase the efficiency and expand the functionality of the device for studying the modes of infrared drying of agricultural products of plant origin. The essence of the proposed utility model is that the device for studying the drying modes of agricultural products of plant origin, contains an infrared emitter with a power supply unit equipped with on and off inputs, a mode setting and recording unit, temperature and humidity sensors of the product, the first, second and third comparators, a drying time lock, equipped with start and stop inputs, an AND circuit and an OR circuit, while the temperature sensor is connected to the first inputs of the first and second mparators, a humidity sensor - to the first input of the third comparator, the output of the first comparator - to the switching input of the power supply through the AND circuit, the output of the second comparator is connected to the disconnecting input of the power supply via the OR circuit, the drying time lock output is connected to the second inputs of the AND and OR circuits, the output of the third comparator is connected to the stop input of the drying time lock, and the second inputs of all comparators, their outputs, the starting input and output of the drying time lock are connected to the mode setting and registration block. The utility model has development, which consists in the fact that the unit for setting and recording modes can be performed on the basis of a computer equipped with an interface unit, and temperature and humidity sensors can be connected to the task unit through an additionally introduced analog-to-digital converter equipped with an input switch and registration modes.

Description

Technical field

The utility model relates to the drying of grain and other agricultural products of plant origin and can be used to study and determine optimal drying conditions using infrared radiation (IR drying).

State of the art

IR-drying of agricultural products is a complex physical and biological process, accompanied by changes in seed and technological properties of the product. The nature of these changes depends, in particular, on the type of product, individual characteristics, the initial quality of a particular batch and on the selected drying temperature.

Therefore, infrared drying of large batches of agricultural products is preceded by a study of product samples to select the optimal drying conditions.

A device is known [patent RU 2216257 IPC A 23 L 3/54, A 23 B 7/02, 2004 on the "Method of drying products of plant origin"], with the help of which both the preliminary selection of the drying mode and the subsequent processing of large batches are performed product. Also known are devices specifically designed to study drying processes ["Apparatus for researching the drying process" by ed. testimonial. No. 416539, IPC F 26 B 17/10, 1974 and "Laboratory installation for drying bulk materials" by ed. testimonial. No. 491808, IPC F 26 B 17/10 1975].

A disadvantage of known devices for studying drying conditions, including a device according to ed. testimonial. No. 491808, selected as a prototype, consists in low research productivity, which does not allow to quickly analyze a large number of drying modes to select the optimal process parameters.

Utility model creature disclosure

The objective of the utility model is to increase the efficiency and expand the functionality of the device.

The essence of the proposed utility model is that a device for studying the drying regimes of agricultural products of plant origin, containing an infrared emitter (IR emitter) with a power supply unit, equipped with on and off inputs, a unit for setting and recording modes, temperature and humidity sensors of the product, the first, second and third comparators, a drying time lock provided with start and stop inputs, an AND circuit and an OR circuit, while the temperature sensor is connected to the first inputs the first and second comparators, the humidity sensor - to the first input of the third comparator, the output of the first comparator - to the switching input of the power supply through the AND circuit, the output of the second comparator is connected to the disconnecting input of the power supply through the OR circuit, the output of the latch is connected to the second inputs of the And and OR circuits drying time, the output of the third comparator is connected to the stop input of the drying time lock, and the second inputs of all comparators, their outputs, the starting input and the output of the drying time lock are connected to the mode setting and registration unit.

This allows us to solve the problem of a utility model.

The utility model has development, which consists in the fact that the unit for setting and registering modes can be performed on the basis of a computer equipped with an interface unit, and temperature and humidity sensors can be connected via an additionally introduced analog-to-digital converter (ADC) equipped with an input switch to the unit for setting and registering modes.

Utility Model Implementation

Figure 1 presents the block diagram of the device, taking into account its development.

The diagram shows:

1 - IR emitter; 2 - its power supply, equipped with a switching 3 and disconnecting 4 inputs; sensors 5, 6 of temperature and humidity, respectively; first 7, second 8 and third 9 comparators; 10 - drying time lock; 11 is a logical circuit And; 12 is a logical circuit OR; block 13 job and registration modes; 14 - ADC with input switch; 15 - sample product, such as grain; 16 - sample pan 15; 17, 18, 19 - the first inputs of the comparators; 20, 21, 22 - the second inputs of the comparators; 23 - starting and 24 - table inputs of the latch 10.

The temperature sensor 5 is connected to the inputs 17 and 18 of the first and second comparators 7 and 8, respectively, the humidity sensor 6 is connected to the input 19 of the comparator 9, the output of the first comparator 7 is connected to the input 25 of the And 11 circuit and through it to the switching input 3 of the power supply unit 2 . The output of the latch 10 is connected to the second input 26 of the circuit 11.

The output of the second comparator 8 is connected to the input 27 of the OR circuit 12 and through it to the disconnecting input 4 of the unit 2. The output of the latch 10 is connected to the second input 28 of the circuit OR 12.

The output of the third comparator 9 is connected to the stop input 24 of the latch 10, and the second inputs 20, 21, 22 of all comparators, their outputs start input 23 and the output of the latch 10 of the drying time are connected to the unit 13 for setting and registering modes. Sensors 5 and 6 are also connected to block 13 through an analog-to-digital converter 14 provided with an input switch.

The unit 13 for setting and registering modes can be performed on the basis of a computer equipped with a unit for interfacing with the corresponding input and output signals.

The device operates as follows.

In the initial state, the power supply unit 2 is turned off, and the unit 13 supports a signal at the input 23 of the latch 10, which holds the latch in the off state. In turn, the latch 10 generates a signal at input 28, which, passing through the OR circuit 12 to the input 4, keeps the power supply unit 2 in the off state regardless of the output signal of the comparator 8 supplied to the input 27 of the circuit 12. The same output signal of the latch 10, arriving at the second input 26 of the circuit And 11, blocks the inclusion through it of block 2 at its input 3 by the output signal of the comparator 7, input to the input 25 of the circuit 11.

A sample 15 of the product, for which it is necessary to determine the drying time in various temperature conditions, is placed on a pallet 16 equipped with sensors 5 for temperature and 6 humidity of the product. On block 13 set the on and off temperature of the IR emitter 1, corresponding to the investigated mode, and the desired final (conditional) humidity of the dried product. In this case, at the second inputs of comparators 20, 21, 22, corresponding signal levels are established, which comparators 7, 8, 9 compare with signal levels reflecting the initial state of sample 15 from sensors 5 and 6 at their first inputs 17, 18, 19. B by comparing the initial parameters of the sample 15 with the given comparators 8 and 9 do not work and do not give signals to block 2 and the latch 10, and the comparator 7 works, but its output signal to turn on the block 2 is blocked by the signal of the latch 10 at the input 26 of the And 11 circuit.

Then, the block 13, acting on the starting input 23 of the latch 10, puts the latch 10 in the on state, thereby starting the process of experimental drying of the product. In this case, the blocking signal from the input 26 of the circuit And 11 is removed, the IR emitter 1 is turned on and the heating period of the sample 15 begins, during which the signal from the sensor 6 at the inputs 17 and 18 of the comparators 2 and 8 changes accordingly.

After the signal level at the first input 18 of the comparator 8. reaches a predetermined value supplied to its second input 21 from block 13, the comparator 8 is triggered and its output signal at the input 27 of the OR 12 circuit turns off the IR emitter 1. The temperature reduction interval begins in which a sample of 15 product is traced. When the signal from the sensor 5 reaches the temperature of the signal level from block 13 at the second input 20 of comparator 7, this comparator is activated and, upon input 25 of circuit I 11, turns on the IR emitter 1. The period of heating of the product to the temperature set by block 13 at the second input 21 of comparator is repeated 8, followed by turning off the infrared emitter and tracking sample 15, as described above.

The drying process with repeating periods of heating and curing continues until the sample 15 reaches the final (conditioned) humidity, corresponding to the signal level set by block 13 to the second input 22 of comparator 9.

At this moment, the comparator 9 is triggered and, at the input 24, it releases the latch 10. In the off state, the latch 10 again, using circuits 11 and 12, maintains the off state of the unit 2 supplying the IR emitter and blocks its inclusion.

The arrival of the output signals of the comparators 7, 8, 9 and the latch 10 in block 13 allows you to measure and record the corresponding time intervals with the necessary accuracy and, thereby, automatically record the progress of studies of the temperature conditions of infrared drying of dispersed products.

For a more complete study of the IR-drying process, unit 13 can additionally register simultaneously occurring changes in temperature and humidity of product 15, for which an ADC 14 equipped with an input switch can be introduced into the device. In this case, the signals

from the temperature sensor 5 and the humidity sensor 6 through the ADC 14 enter the block 13 in digitized form.

A useful model can also be used in the study of drying regimes, characterized in addition to temperature and humidity by other variable parameters (for example, such as blowing parameters or spectral parameters of infrared radiation).

Claims (3)

1. A device for studying the drying regimes of agricultural products of plant origin, containing an infrared emitter with a power supply unit, equipped with on and off inputs, a unit for setting and recording modes, temperature and humidity sensors of the product, the first, second and third comparators, a drying time lock, equipped start and stop inputs, AND circuit and OR circuit, while the temperature sensor is connected to the first inputs of the first and second comparators, the humidity sensor to the first input of the third of the comparator, the output of the first comparator is to the switching input of the power supply through the AND circuit, the output of the second comparator is connected to the disconnecting input of the power supply via the OR circuit, the output of the drying time lock is connected to the second inputs of the circuits AND, the output of the third comparator is connected to the stop input of the fixing drying time, and the second inputs of all comparators, their outputs, starting input and output of the drying time lock are connected to the unit for setting and registering modes. 2. The device according to claim 1, in which the unit for setting and registering modes is made on the basis of a computer equipped with an interface unit. 3. The device according to claim 1, in which the temperature and humidity sensors through an additionally introduced analog-to-digital converter equipped with an input switch are connected to the unit for setting and registering modes.