CN2137864Y - Automatic controlled temp rgulator - Google Patents

Abstract

The utility model relates to an automatic controlled temperature regulator which is composed of a temperature measurement system, a preset temperature system, a control system, a protection system and a display system. The automatic controlled temperature regulator has the advantages of simple structure, low cost, multiple functions and reliable temperature control, the automatic controlled temperature regulator can be used for heating devices of electric blankets, water bed heaters, minitype electric incubators, etc., and the automatic controlled temperature regulator has the functions of automatic temperature control, automatic protection, maximum temperature limit, etc.

Description

Automatic controlled temp rgulator

The utility model is a kind of temperature control equipment, and temperature automatically controlled adjuster is used for heaters such as electric blanket, water bed heater, small electrical incubator.

Present existing temperature control adjuster has multiple, but mostly circuit more complicated, cost height, function imperfection, easily produce misoperation.

The purpose of this utility model is to propose a kind of simple in structure, and the temperature automatically controlled adjuster that cost is low, multiple functional overcomes the shortcoming that existing temperature controller exists.

Major technique content of the present utility model is, this temperature automatically controlled adjuster is by temp measuring system, gives putting temperature system, control system, protection system, display system and constituting, and temp measuring system is by resistance R ₂, R ₃Form R ₃Be copper cash or the acid bronze alloy on the heating wire, as temp.-sensing wire, R ₃Comparator IC with control system ₁9 pin pass through resistance R ₆Connect, pass through resistance R ₇IC with holding circuit 5 ₄Connect; Control system 2 is by comparator IC ₁, resistance R ₉, voltage-stabiliser tube DW ₂, effect pipe 9013, bidirectional triode thyristor BCR form, be connected with holding circuit with load; Holding circuit is made up of warm thermometric holding circuit 5 of limit and load protection circuit 6, limits warm thermometric holding circuit by operational amplifier IC ₄With diode D ₁Constitute IC ₄Output 14 pin are by diode D ₁, D ₂Be connected with control circuit power tube 9013, load protection circuit 6 is a unitary operation amplifier IC ₂Output 7 pin are by diode D ₂, D ₄Be connected with the base stage of the power amplifier 9013 of control system, 7 pin pass through D ₄, R ₁₆With display system IC ₃2 pin connect; Display system shows that by duty demonstration 7 and protection 9 constitute, and duty shows by resistance R ₂₀With indicator lamp LED ₃Form, be used to show load condition, pass through resistance R ₂₀Be connected with load; Protection shows that 9 is by a unitary operation amplifier IC ₃, resistance R ₁₉With indicator lamp LED ₂Constitute, pass through D ₄Be connected with holding circuit 6, pass through D ₁Be connected with holding circuit 5, give and put temperature system by adjustable resistance W ₂, W ₃, resistance R ₄, potentiometer W forms, by the centre tap of potentiometer W and the IC of control section ₁10 pin link to each other.

Technique effect of the present utility model is, that this temperature automatically controlled adjuster and existing temperature control adjuster relatively have is simple in structure, with low cost, multiple functional, temperature control reliable, advantage of high precision, can be widely used on the firing equipments such as electric blanket, water bed heater, small electrical incubator.Can effectively control its temperature and have good energy-saving effect, use through the reality test on electric blanket, to can save energy 30-40%.Have functions such as temperature automatically controlled, automatic protection, the highest limit temperature.

Fig. 1 is a circuit block diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model;

1 preset temperature system, 2 control systems, 3 loads, 4 temp measuring systems, the warm thermometric protection of 5 limits, 6 load protections, 7 duties show, 8 the highest limit temperature, 9 are protected demonstration, R ₁-K ₂₄Resistance, DW ₁, DW ₂, DW ₃Voltage-stabiliser tube, D ₁-D ₅Diode, LED ₁Power supply indicator, LED ₂Relay indicating light, LED ₃Malfunction indicator lamp, W ₁, W ₂, W ₃Adjustable resistance, W potentiometer, IC ₁, IC ₂IC ₃, IC ₄, LM329 operational amplifier, BCR bidirectional triode thyristor, 9013 power tubes.

The operation principle of this temperature automatically controlled adjuster as shown in Figure 2, temp measuring system 4 is by resistance R ₂, R ₃Form R ₃Be copper cash or the acid bronze alloy on the heating wire, as temp.-sensing wire.Its characteristic is the rising along with environmental temperature, and its resistivity increases, and voltage signal also changes, and its change procedure is △ t ° → △ R → △ u.

Preset temperature system 1 is by adjustable resistance W ₂, W ₃And potentiometer W forms, and inputs to comparator/operational amplifier IC according to the variation of ambient temperature measurement system 4 voltages ₁9 pin are determined the operating point, adjust W ₂, W ₃Make its quiescent potential corresponding with institute of environment measurement system measured value.

Control system 2 is by comparator IC ₁, resistance R ₉, voltage-stabiliser tube DW ₂, power tube 9013, bidirectional triode thyristor BCR form.The obtained voltage signal of temp measuring system and preset temperature system passes through IC ₁Comparator has determined the duty of control section, when environmental temperature is lower than preset temperature, i.e. and IC ₁9 pin current potentials be lower than 10 pin current potentials, IC ₁8 pin output high potential, promote 9013 work, the BCR conducting, is heated at the energising of main circuit heating wire.Otherwise heating wire stops heating.After reaching heat balance, main circuit is interrupted heating, reaches the constant temperature purpose.

Protection system is made up of warm thermometric holding circuit 5 of limit and load protection circuit 6, when the main circuit heating wire disconnects or strikes sparks, and C ₅Pass through R ₁₄The loop discharge makes IC ₂5 pin current potential moment current potentials reduce, and 6 pin current potentials are partial pressure potential of being exported by 8 pin.At this moment, IC ₂End of oppisite phase 6 pin current potentials be higher than in-phase end 5 pin current potentials, IC ₂Output 7 pin output LOW voltages, pass through D ₄Drag down 2 pin current potentials, pass through D again ₂Drag down 9013 triode quiescent potential, IC like this ₃1 pin output high potential, trouble light is bright, 9013 end simultaneously, BCR cuts off main circuit.Because pin 1 is a high level, passes through D ₃Making pin is high level.Finish self-locking.5 pin voltages are R during operate as normal ₂₄Voltage drop, R ₂₄For being connected on more powerful resistive element in the load.

Display system is shown by duty and protection shows LED ₁Be power supply indicator, LED ₂Be relay indicating light, LED ₃Be malfunction indicator lamp, LED when operate as normal ₁, LED ₂Bright, LED behind the constant temperature ₂Flicker, LED when breaking down ₃Bright.

This temperature automatically controlled adjuster operation principle is, when inputing to comparator IC ₁10 pin current potentials are higher than 9 pin current potentials, and 8 pin output high potential passed through R when just electric blanket temperature was lower than preset temperature ₉Provide operating voltage, electric current to 9013.Make 9013 conductings, BCR obtains conducting behind enough operating voltages, the current signal, and the load energising is in heated condition.When inputing to IC ₁When 10 pin current potentials are equal to or less than 9 pin current potentials, when just electric blanket temperature is equal to or higher than preset temperature, 8 pin output electronegative potential, 9013 by, BCR turn-off, cutting off the electricity supply stops heating.After heating Ei temperature reached preset temperature, the temperature of electric blanket was just upper and lower unsteady at preset temperature, thereby reaches the constant temperature purpose.

Claims (1)

1, a kind of temperature automatically controlled adjuster by temp measuring system, give and put temperature system, control system, protection system, display system and form, is characterized in that temp measuring system is by resistance R ₂, R ₃Form R ₃Be copper cash on heating wire or acid bronze alloy, R ₃Comparator IC with control system ₁9 pin pass through resistance R ₆Connect, pass through resistance R ₆IC with holding circuit 5 ₄Connect; Control system is by comparator IC ₁, resistance R ₉, voltage-stabiliser tube DW ₂, effect pipe 9013, bidirectional triode thyristor BCR form, be connected with holding circuit with load; Holding circuit is made up of warm thermometric holding circuit of limit and load protection circuit, limits warm thermometric holding circuit output 14 pin by diode D ₁, D ₂Be connected with control circuit effect pipe 9013, load protection circuit is a unitary operation amplifier IC ₂, output 7 pin are by diode D ₃, D ₄Be connected with the substrate of the power amplifier 9013 of control system, 7 pin pass through D ₄, R ₁₆With display system IC ₃2 pin connect; Display system is shown by duty and the protection demonstration constitutes, and duty shows by resistance R ₂₀With indicator lamp LED ₃Form, pass through R ₂₀Be connected with load; Protection shows by a unitary operation amplifier IC ₃, resistance R ₁₉With indicator lamp LED ₂Constitute, pass through D ₄Be connected with holding circuit 6, pass through D ₁Be connected with holding circuit 5, give and put temperature system by adjustable resistance W ₂, W ₃, resistance R ₄, potentiometer W forms, by the centre tap of potentiometer W and the IC of control section ₁10 pin connect.

Images