SU1341623A1 - Temperature regulating device - Google Patents

Abstract

The invention relates to an automatic control technique and is intended to control the temperature in the systems for maintaining the temperature and humidity conditions in order to provide a comfortable working environment for personnel with limited space and power resources. The purpose of the invention is to save energy, increase the service life of the device. The device contains a power source 1, a remote switch 12 heater sections, a three-position temperature sensor 4, diodes 15-1 - 15-4, optocouplers 17, 18, resistor 19, a microprocessor with RAM 6 and ROM 7, input registers 8 and output 9 of the parallel interface , timer 10, power supply unit 11, which is turned on and off by means of relays 14 and 16, associated with a temperature sensor 4 and an output register 9. i (L C

Description

The effect of saving energy and increasing the service life is achieved by introducing relays 14 and 16, by means of which it is disconnected from the power source.

The invention relates to an automatic control technique and is intended to control the temperature in systems that maintain temperature and humidity conditions to provide comfortable conditions for personnel with limited space and power resources in systems with increased requirements for the technical equipment's time resource, where, for example, The sectional electric air heaters are used to heat the object and to cool the cooling units.

The purpose of the invention is to save energy by turning off the device during periods when the temperature is within the specified limits, increasing the service life of the device by reducing the time spent in the on state.

1 shows a block diagram of the device; 2 and 3, the algorithm of its operation.

The device for temperature control contains a source 1 powered by: and, section heater 2, control object 3, temperature sensor 4, microprocessor 5 with memory 6 and permanent memory 7, input 8 register and parallel interface output 9, timer 10 , power supply unit 11, remote switch 12, second power supply bus 13, turn-on relay 14 with contacts 14-1 and 14-2, diodes 15-1 -15-4, switch-off relay 16 with contact 16-1, optrons 17 and 18, the resistor 19 and the first power supply bus 20.

The device works as follows.

When the temperature value is within the specified limits, the contacts of the sensor are 4 times acynty and the control device does not work. In the event that the microcomputer goes out and is turned on with the power supply unit for the time the controlled variable is in the dead band. 3 il.

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Yes, the temperature in the control object 3 from the controlled limits closes the contact of sensor 4, which triggers the relay 14 to turn on and close its contacts 14-1 and 14-2, Pin 14-1 connects the power supply unit 1 to the source buses 13 and 20 1 food. The power supply unit 11 supplies the required voltage levels to the timer 10,

 microprocessor 5, random access memory 6, fixed memory 7. This causes the microprocessor to turn on and exit to the desired cell in the fixed memory 7. The program recorded in the fixed memory starts to run. Next, the operation of the device occurs in accordance with the algorithm shown in figure 2. Getting started is indicated in block 21.

0 In block 22, the operation is initialized (reset of external devices, preparation of memory cells, etc.). Then, through the input register 8, the current state of the temperature sensor 4 connected via the optrons is accepted (block 23) and the combination of the included subsections m of the heater 2 is entered (block 24). The magnitude of the initial power change of an AP is assumed to be

0 A is a constant for a given control object (block 25). Further, in accordance with the information entered into block 23, block 26 determines the level of temperature reached by the boundary (upper or lower), on the basis of which the sign of the power increment on the heater is determined (block 27). In block 28, a new combination of included subsections is formed in accordance with the required change in power dP and the power given out to the object earlier, and then the new combination of subsections is output through output pe-j hister (FIG. O to remote switch 12 that switches the subsections with source 1 power supply (block 29).

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31341623

Thereafter, the counting begins. The adjustment is completed. The end of the wound time interval G (block 30), during which the temperature sensor should open. If the opening did not happen in time (block 33), then the increment of dP power was insufficient and it needs i increase (block 34) by 2 times, and then repeat all operations, starting with block 27, with a new value of 4 P. In block 31 The state of temperature sensor 4 is entered through register 11, and in block 32, the presence of sensor 4 signal is checked. As soon as the signal from sensor 4 disappears, time T is reset (block 35) and time intervals T and T begin (block 36 ), where T is the time of temperature change in the control object 3 from one level of the boundary to another when setting the power increment on the heaters; 2, the specified time interval. No signal from the sensor. temperatures over time i-. ° Starts the end of the control process in a given control cycle (by tact is understood the control process from on to off of the control device).

In blocks 37 and 38, the status of temperature sensor 4 is entered through register 8 and it is analyzed whether it has closed. If sensor 4 is closed, the temperature in the object has reached the opposite level (block 10), then, in accordance with the calculated time T (block 36), until the end of the interval

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bots are denoted by block 44.. I

The proposed device for regulating with the given algorithm of operation due to the introduction of new elements ensures high qualities of regulation by fixing the dynamic characteristics of the object in the memory of the microprocessor and the constant adjustment of these characteristics as they change. Moreover, the processor performs all operations only when the temperature deviates from the norm. Under normal conditions, in the absence of a temperature deviation, regulation is unnecessary and the processor is turned off and does not consume; energy.

15

20 f

formula of invention

25

A temperature control device comprising an n-section heater, a power source, a three-position temperature sensor, a remote heater section switch, diodes, optocouplers, a resistor, a microprocessor with operational and permanent memory, input and output registers

30 parallel interface, timer, power supply unit to which a microprocessor is connected via clock power, which is connected to the timer output via address buses

35 data and control registers input and output of the parallel interface, RAM and Permanent memory, characterized in that, with

the purpose of saving energy, increasing the time T (block 39), and also, according to the life of the device, to change the state of the sensor (block 40)

switching-on and switching-off relays are introduced, and the n outputs of the parallel interface output register are connected to the control inputs of the switching elements of the remote heater section switch, whose information outputs are connected to the n inputs of the parallel input register

the required increment of power dР is calculated according to the formula of block 41: iР - CT and the algorithm is repeated starting from block 27. If the temperature value in the object returns to the previous boundary, then go to block 34. The control cycle ends

provided there is no sensor-interface signal, the first bus of the temperature source 4 (block 42) is connected to the power supply through the first discharge of a predetermined period of time G. . the closing contact of the switching-on relay at the end of the cycle of operation is made by the coman- the first input of the power supply unit, and also from the output register 9 to the middle contact of the sensor by the temperature of the relay 16 (block 43), which leads .pypj diode and second contact opening contact 16-1, disconnecting the switching contact of the relay to turn on the relay 14 and relieving voltage from the first winding terminal of this relay, and the power supply unit 11 due to the opening through the second and third diode connecting the terminal 14 -2 Stops the feed with extreme contacts. The sensor supplies power to the device nodes, the clock cycle, which are also connected

bots are denoted by block 44.. I

The proposed control device with the above algorithm of operation due to the introduction of new elements ensures high quality of regulation by fixing the dynamic characteristics of the object in the memory of the microprocessor and constant adjustment of these characteristics when they change. Moreover, the processor performs all operations only when the temperature deviates from the norm. Under normal conditions, in the absence of a temperature deviation, regulation is unnecessary and the processor is turned off and does not consume; energy.

20 f

formula of invention

A temperature control device comprising an n-section heater, a power source, a three-position temperature sensor, a remote heater section switch, diodes, optocouplers, a resistor, a microprocessor with operational and permanent memory, input and output registers

a parallel interface, a timer, a power supply unit to which a microprocessor is connected via a power supply bar, which is clock input connected to the output of the timer via address buses

data and control of the I / O register of the parallel interface, operational and permanent memory, which is characterized by the fact that

the purpose of saving energy, increasing the life of the device, into it

switching-on and switching-off relays are introduced, and the n outputs of the parallel interface output register are connected to the control inputs of the switching elements of the remote heater section switch, whose information outputs are connected to the n inputs of the parallel input register

513416236.

the control circuit of the first and second output registers is connected through an optocoupler and a second bus resistor: - the winding of the off relay and a parallel power source and the second input of the power supply, the negative bus of the power supply is connected through the executive circuits of the optocouplers to (n 1) - m

connected to it the fourth diode with a positive bus of the power supply unit, the current of the turn-on relay winding is connected via the disconnecting contact of the disconnecting switch to the second power supply bus.

and (n + 2) -th inputs of the input register of the parallel interface, (n + 1) -th

The output of the register is connected through the winding of the off relay and the fourth diode connected to it with the positive bus of the power supply unit, and the phase of the winding of the switch-on relay is connected via the disconnecting contact of the relay to the second bus of the power supply.

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Compiled by J. Grechishnikov Editor J. Petrushko Tehred L. Serdyukova Proofreader I. Muska

Order 5726

Circulation 863 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

Claim A device for temperature control, containing an η-section heater, a power supply, a three-position temperature sensor, a remote switch of the heater sections, diodes, optocouplers, a resistor, a microprocessor with random and permanent memory, input and output registers of the parallel interface, a timer, a power supply to which the microprocessor is connected via the power bus, which is connected by a clock input to the timer output via the data address bus and the control of the input and output registers of the parallel interface and permanent memory, distinguished by the fact that, in order to save energy, increase the operating life of the device, an on-relay and an off relay are introduced into it, moreover, the η outputs of the parallel interface output register are connected to the control inputs of the switching elements of the remote control section of the heater sections, the information outputs of which are connected to the η inputs of the input register of the parallel interface, the first bus of the power source is connected through the first make contact of the enable relay to the first input of the power supply, and Also with the middle contact of the temperature sensor and through the first diode and the second make contact of the enable relay with the first output of the circuit of this relay, and through the second and third diodes it is connected to the extreme contacts of the temperature sensor !, which are also connected through the control circuits of the first and second optocouplers and a resistor with a second power supply bus and a second input of the power supply, the negative bus of the power supply is connected via the optocoupler executive circuits to the (n + 1) th and (n + 2) th inputs of the parallel interface input register, (n + 1) th output register output is connected across the relay coil and parallel to it off the fourth diode is incorporated with the positive power supply bus, the output switch relay coil is connected through normally closed trip contact relay with the second power source bus. Fi g. 2