CS218638B1 - Connection for universal use of temperature controller for cyclic regulation - Google Patents

Abstract

The purpose of the invention is to ensure the possibility of selecting any temperature, maximum and minimum values of the cycle with one temperature controller while maintaining maximum regulatory effect. ! The essence of the invention lies in connecting the second pole of the thermocouple sensor to one switch; one switch to one part of the third switch and to the second switch, the second switch to one part of the fourth switch and the temperature controller, the second part of the third switch to the second part of the fourth switch and the second part of the fourth switch to the temperature controller.

Description

The invention relates to a wiring for universally using a temperature range controller in cyclic regulation with one range interval and a second thermocouple sensor for use outside this control range as well as a type of thermocouple sensor.

Temperature control over a wide range requires a range of temperature controllers, both in terms of ranges and associated sensor types. Such a solution is. costly, demanding on maintenance, repairs and space. The known connection for the universally used temperature controller, where a controlled source is routed between one pole of the thermocouple sensor and one temperature controller inlet, is only suitable for temperature control where one constant temperature is required during the heat treatment period. For cyclic control where the temperature during the heat treatment periodically changes from maximum to minimum and vice versa, such a solution is inappropriate.

The described disadvantages eliminate the wiring for universally using a temperature controller in cyclic control.

SUMMARY OF THE INVENTION The second pole of a thermocouple sensor is connected to a changeover contact of one switch whose switching contact is connected to a changeover contact of one part of a third switch, the breaker contact of one switch is connected to a changeover contact of another switch whose break contact is connected to the other the temperature regulator supply, the switching contact of the second switch is connected to the switching contact of one part of the fourth switch and the other parts of the third and fourth switches are interconnected and connected to the second supply of the temperature regulator.

The advantage of the proposed circuit is the possibility to choose any temperature of maximum and minimum cycle value with one temperature regulator while maintaining maximum regulation effect.

The overall schematic of the universal use of the temperature controller in cyclic control with two controlled sources is shown in the attached drawing.

Claims (1)

Wiring for universal use of temperature regulator in cyclic control where one pole of thermocouple sensor is connected to one temperature regulator inlet and poles of controlled sources to the make and break contacts of two-part switches, characterized in that the other pole of thermocouple sensor (B) is connected to make a first switch (D) whose make contact is connected to the make contact of one part of the third switch (E), the break contact of the first The wiring consists of a temperature controller A connected to a thermocouple sensor; thermocouple sensor B; connected to the first switches D; a second switch C connected to the temperature controller, a first switch D connected to the second switches C; a third switch E connected to the first switches D i of the temperature controller A, a fourth switch F connected to the second and third switches C, E; a first upstream source G connected to the third switches E and a second controlled source H connected to the fourth switches F. The connections according to the invention are used as follows depending on the position of the individual switches. The first switch D, controlled by the timing device, switches two states to create cyclic control with maximum and minimum temperature at one setpoint on temperature controller A. If the temperature controller range A is suitable to process the direct signal of thermocouple sensor B at maximum temperature is the second switch C in the upper position, connecting sensor B directly to temperature controller A. By switching the second switch D to the lower position, the thermocouple sensor B is connected via a controlled source G to the temperature controller A according to the position of the third switch E to increase or decrease its signal, temperature values. By switching the second switch C to the lower position, the thermocouple sensor B is connected in both positions of the first switch D to the controlled sources G and H and according to the third and fourth switches E and F its signal is increased or decreased to reach maximum and minimum cycle temperatures in the controller temperature A. The proposed circuitry according to the invention allows to set 'six' options for cyclic control. The wiring of the invention can be used to extend the range of temperature controllers with a thermocouple sensor in cyclic control. BACKGROUND OF THE INVENTION The switch (D) is connected to a changeover contact of a second switch (C) whose break contact is connected to a second supply of the temperature controller (A), while the switch contact of the second switch (C) is connected to a changeover contact of one part of a fourth switch. ) and the second parts of the third and fourth switches (E) and (F) are interconnected and connected to the second inlet of the temperature controller (A).