SU1499073A1 - Method of microclimate control in animal-raising premises - Google Patents

Abstract

The invention can be used to control the temperature and humidity conditions in livestock buildings. The purpose of the invention is to reduce energy consumption and improve the accuracy of regulation. The regulation is carried out by changing the heat and air capacity of the ventilation unit. When the set points are reached, the difference between the values of thermal power (TM) of the air entering the room and TM is determined to heat the latter up to the temperature of the air in the room, which is kept constant for the duration of the air temperature within the specified limits. 1 il.

Description

The invention relates to ventilation and heating and can be used to automate heating and ventilation systems.

The purpose of the invention is to reduce energy consumption and improve the accuracy of regulation.

The drawing shows a device for implementing a method for controlling a microclimate.

The device contains an electric heat accumulation heater 1 with a solid battery core, a mixing chamber 2 for controlling the supply air temperature, a control valve 3 for control 4, a control air supply for valve 5 for supply air, 7, a duct 8, a sensor 9 for supply temperature (Vg) zduukha, air-performance sensor 10, sensor II for air temperature of livestock

the room and the relative air humidity sensor 12 in the room 13. The sensors are connected via standardization amplifiers 14-17 to an analog multiplexer (AM) 18, the output of which is connected to an analog-to-digital converter (ADC) 19, the digital output of which is connected to the input of a microprocessor controller (CK) 20, one of the outputs of which is connected to the drives 3 and 5, and the other to the control buses of the analog multiplexer 18 and the A / D converter 19.

The device works as follows.

When the fan 7 is operating, the outside air passes through the core of the battery 1, is heated in the mixing chamber 2, the position of the valve 4 sets its temperature, and the position of the valve 6 sets the air capacity and the air duct is supplied to the livestock breeder

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13. The signals from sensors 9–12 normalize the amplifiers 14–17 and, using control signals from the MK 20, AK 18, connects them to the input of the ADC, in which they are converted into a digital code and recorded into the RAM of the MK 20. The MK memories recorded specified values — temperature and relative humidity of the air in the livestock building, as well as the dependence of air density on temperature, the constant specific heat capacity of air, specified, control accuracy, size of control limits and air change. performance and supply air temperatures when running control signals.

When executing the algorithm of the invented method, the MC gives control commands to the inputs of the drives 3 and 5.

Until the moment of setting the given

the room air temperature by changing the position of the flap 4, regulates only the supply air temperature. At the time of setting the desired room temperature, the MK 20 inputs data from sensors 9-12 and calculates the difference in thermal powers. Then, by the deviation of the relative humidity, the MK 20 generates a control signal for changing the air production into the actuator 5, simultaneously from the condition of constant thermal power determines the temperature value of the air inlet, and sends a control signal to the actuator 3 to set this temperature value.

This adjustment process lasts until the change in the thermal regime of the room, i.e. temperature deviations;

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the air in the room is from a predetermined value, after which it proceeds to maintain the temperature of the air in the room by changing the position of the damper 4. The adjustment process is repeated.

Thus, for each thermal mode of the room, when adjusting the relative humidity of the air according to the proposed method, the difference in thermal power is maintained, determined at the moment of over- /./k; from temperature control to regulation of relative air humidity.

Claims (1)

Invention Formula The method of controlling the microclimate of the livestock building by maintaining the desired air temperature in the room by changing the heat output of the heating and ventilation unit, and the given relative humidity - by simultaneously changing the heat and air capacity of the plant, characterized in that, in order to reduce energy consumption and increase the control accuracy , when a predetermined temperature is reached, the amount of thermal power of the air entering the room and the amount of heat are measured th power required for heating this air to an air temperature of a room is determined difference between the measured values and support the latter constant for a period of residence of the room temperature within a predetermined value by changing the heat capacity heating-l-translational installation venti- Lrito (/ nsh  bozdukh fmovHbfU bozduh Нор1М НШШ I eo3fft / x% I one w / v 20 Yuo 6 And about  J 7 G