SU1282096A1 - Device for controlling temperature in objects with similar conditions - Google Patents

Abstract

The preferred use of the invention is sawing poultry, mainly the process of local heating of young poultry by means of electric brooders. The purpose of the invention is to increase reliability when controlling temperature in objects with similar conditions. The goal is achieved by the fact that the device uses one object temperature sensor and adjusts the mode of operation of the controller according to the results of monitoring the temperature distribution of the circulating medium by a corresponding change in the value of the output parameter of the object temperature setter. For this, a device for controlling the temperature of objects with similar conditions includes a setting device 5 and an object temperature sensor 1, environmental temperature sensors 2, comparators 3, keys 4, controller 6, heaters 7, and a resistive voltage divider on elements 8-10. 1 il. i (L

Description

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11282096

The invention relates to temperature control and is intended primarily for use in centralized temperature control systems in objects with the following conditions. For example, 4 of them are used to control air conditioning systems. d v v k n t s e n z h v

conditions, for example, in convection-type brooders, incubators.

The aim of the invention is to improve the reliability of the device for controlling the temperature in objects with similar conditions.

The drawing is a functional diagram of the device for controlling the temperature in objects with similar conditions.

The device contains an object temperature sensor 1, ambient temperature sensors 2, outputs connected to the inputs of Comparators 3, keys 4, unit 5 temperature of volume, controller 6 with heaters of object 7 connected to its output, while unit 5 of object temperature connected to the first input of the regulator 6 through the input resistive voltage divider, consisting of a series connection of resistors 8-10, connected between the output of the object temperature setpoint 5 and the common bus of the device, with the average point of Voltage is connected to the first input of the regulator 6, the extreme resistors 8 and 10 of the voltage divider are bounded by the corresponding keys 4, while the sensor 1 of the object temperature is connected to the input of the regulator 6, and the outputs of the comparators are the 3rd control inputs of the keys 4.

The device works as follows.

Comparators 3, according to the results of intercomparison of signals from sensors 2 of the ambient temperature, provide one or several switches 4 to operate, which leads to supplying the first input of controller 6 with a new value of the object temperature setpoint generator 5, which corrects the mode of operation of the controller according to mutual correspondence distribution of the ambient temperature and the location of the monitored object, equipped with the sensor 1 of the object temperature. In this case, the regulator 6 changes the level of power supplied to the object heaters in order to prevent overshoot.

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Lirovanie temperature in objects for the cases of the controlled object outside the zone of priority relative values of the ambient temperature. Comparators 3 and keys 4 allow you to simply change the priority control conditions according to the principle of using information about the spatial distribution of the environment zone with the priority temperature value relative to the object being monitored by changing the mutual correspondence of its inputs and outputs. For the case of the presence of three sensors 2 of the ambient temperature, as well as at the location of the monitored object near the central sensor 2 of the ambient temperature and with the priority setting of the temperature of the object according to the condition of placing the monitored object with the sensor 1 of the object temperature in the zone with an average or intermediate value of the ambient temperature then The docking of the device is illustrated in the drawing. For example, when a controlled object is placed at a given time in an environmental zone with an average relative temperature value, two switches 4, which shunt the same size resistors 8 and 10 in different arms of the voltage divider, are either turned on or off, which does not change the coefficient transmission of the voltage divider and, accordingly, the voltage value at the first input of the regulator 6. When the controlled object is in a zone with a relative maximum ambient temperature value Jelic output regulator for eliminating unacceptable temperature reduction in uncontrolled objects. For this, the second (lower) switch 4 closes, shunt resistor 10, which leads to a fixed reduction in the voltage divider transfer ratio and to a corresponding decrease in voltage at the first input of regulator 6, as a result of which the power level supplied to the object heaters 7 increases.

The proposed device provides increased reliability of temperature control in objects with similar conditions, since it has only one object temperature sensor.

which is permanently connected to the input of the controller.

Claims (1)

Formula invented A device for controlling the temperature in objects with similar conditions, containing comparators, ambient temperature sensors connected in pairs to the comparators' inputs, keys, an object temperature setter, a controller with heaters connected to its output and To the input - a data point of the object temperature, characterized in that, in order to increase reliability in operation, a reagent voltage divider is introduced into it, through which the object temperature setter is connected to the common bus of the device, parallel to the divider resistors are included the corresponding keys that control inputs connected to the outputs of the respective comparators, the output of the resistive voltage divider is connected to the corresponding input of the controller.