SU1450783A1 - Method of monitoring and automatic regulation of intensity breathing of bulk grain in storehouses - Google Patents

Abstract

The invention relates to storages equipped with active grain venting devices. The aim of the invention is to reduce grain losses from self-heating. This method involves determining the relative humidity of still air in the overgrown storage space and ventilating the grain layer with moisture not exceeding the equilibrium moisture content of the grain stored for storage, and ventilation is performed when the difference between the humidity of the atmospheric air and the air of the overdraft space is higher than the specified one. 1 il.

Description

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This invention relates to methods for monitoring and automatically controlling the respiration rate of a grain mass in storage.

The purpose of the invention is to reduce grain losses from self-heating.

The drawing shows a flowchart that implements the proposed method.

The block diagram has two circuits, one of which includes: a relative humidity sensor 1, the output of which through the subtraction unit 2 is connected with one of the inputs of the comparison unit 3, the second input of the latter is connected with the output of the master unit 4, the output of the comparison unit 3 through the amplifying unit 5 is connected to the input of the heat vent unit 6, the output of which through the control object 7 is connected to the input of the sensor 1 relative humidity of air. The other circuit includes: a relative humidity sensor 8, the output of which is connected to the input of the subtraction unit 2 and the input of the comparison unit 9, the other input of which is connected to the output of the master unit 10, the output of the block 9 through the amplifying unit 11 is connected to the input of the heat and frying unit 6, the output of which is connected to the input of the sensor 8 relative humidity.

The method is carried out as follows.

With an increase in the intensity of respiration of the grain mass, the relative humidity of the air in the supergrain space increases. repositories. The relative humidity sensor 1, installed inside the storage, in its supergrain space, responds to an increase in relative humidity and sends a signal f to subtraction unit 2, where the signal p ... from the relative humidity sensor 9 controlling humidity is subtracted from it atmospheric air.

The difference signal AP, i.in block 3, is compared with the signal of the driver block 4. When this difference is exceeded, the command 1450783 is sent through the amplifier 5

yes, to turn on the fan of the heat ventilation unit 6. The grain essence is maintained, and the relative humidity of the ventilated air is maintained at the level of the conditioned equilibrium humidity of seeds. The signal from the atmospheric air relative humidity sensor 9 in block 10 is compared with the signal of driver unit 11, and the amplifying unit 12 is given the command to turn on or turn off, depending on the signal level at the output of block 10, sections of heating elements in the heat fan unit 6. Process Venting is carried out until the difference fi at the output of block 2 is 5 equal to zero, then through block 3 of comparison and amplifying block 5 a command is given to turn off the heat fan block 6. The proposed method allows reduce grain losses from self-heating and reduce energy costs for maintaining the conditional properties of grain by increasing the accuracy of control and eliminating the need to ventilate the grain mass while monitoring its condition.

5 Formula of Invention

The method of controlling and automatically controlling the intensity of respiration of the grain mass in the storages, which involves measuring the relative humidity of atmospheric air, supplying ventilating air and regulating its humidity by connecting heating elements depending on the mismatch between the current and the specified values of atmospheric air humidity, In order to reduce grain losses from self-heating, the relative humidity of the air in the non-supergrain space is measured, determine the difference between this humidity and atmospheric humidity

40 air, compare it with a predetermined value, and the supply of ventilating air is carried out depending on the result of the comparison.

Claims (1)

Claim A method of monitoring and automatically controlling the intensity of respiration of grain mass in storages, which provides for measuring the relative humidity of atmospheric air, supplying ventilating air and regulating its humidity by connecting heating elements depending on the mismatch of the current and set values of atmospheric humidity, characterized in that, in order to reduce grain loss from self-heating, measure the relative humidity in the windproof grain space, determine divide the difference between this humidity and atmospheric humidity, compare it with a given value, and the supply of ventilating air is carried out depending on the result of the comparison.