CN2094200U

CN2094200U - Automatic thermal heater

Info

Publication number: CN2094200U
Application number: CN 91216914
Authority: CN
Inventors: 李春义
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-06-28
Filing date: 1991-06-28
Publication date: 1992-01-29

Abstract

The utility model relates to a novel automatic constant temperature heater which belongs to the field of electronic temperature control. The utility model comprises a heater and a constant temperature controller, and the two parts adopt the integral combination or the inserting combination of the constant temperature controller. A bimetallic strip thermal controlling mechanism is used in the constant temperature controller to carry out single-adjustment and double-fixation. A controlled silicon constant temperature control circuit of single-adjustment and double-fixation is adopted, which is composed of a resistance wire, the bimetallic strip thermal controlling mechanism and controlled silicon. The utility model with the advantages of convenient use, high temperature control precision, low cost and long service life is a thermal controlling device which is suitable for the aquiculture of tropical fishes.

Description

Automatic thermal heater

New type auto constent temperature heater is the heater of A.T.C, can be used for tropical fish and cultures temperature regulating device, belongs to the electron temperature-control field.

At present the tropical fish automatic constant-temperature heater appearance structure of culturing usefulness is distinguished two kinds of split type (radiator valve independently separates separately with heater) and monoblock types (radiator valve and heater design are in aggregates).Split type owing to adopt the temperature control heating separately, do not exist heat to disturb, accuracy of temperature control relatively accurately and electric heater damages or power is undesirable all can change at any time, more convenient, its shortcoming is that the circuit connection seems disorderly, and electric wire ducks in drink for a long time and forms hidden danger and not attractive in appearance easily.Monoblock type is with radiator valve, heater makes up in same Zhi Jiachang glass tube, circuit adopts inner the connection, there is not lead-in wire in the water, have attractive appearance, its shortcoming is that thermostat heater two parts are too near from getting, heat-insulating problem can't solve, a part of heat of sending of heater makes the temperature around the temperature controller be higher than water temperature in other words, thereby influenced temperature control precision greatly, fuse on the heater controller structure simultaneously, power can't change, and damages to be difficult for changing, existing constent temperature heater is to utilize the temperature memory characteristic of bimetal leaf to realize that the flexibility of bimetal leaf changes with different environmental temperatures.By the machinery adjustment, can make the silver contact on the bimetal leaf constantly be switched on or switched off heater power source in the temperature of adjusting, thus steady temperature.Because bimetal leaf temperature control break-make is the slow motion formula, can produce bigger spark during closed disconnecting circuit, with the passing of time silver contact can ablation, adhesion, cause temperature control, people often are designed to the bimetal leaf controlling organization to be connected in series with that the cover of two in the circuit is common uses.Using method is if require water temperature to be constant at 25 ℃, just select one group of bimetal leaf temperature-controlling mechanism earlier, adjustment is set in 25 ℃, and another group bimetal leaf temperature-controlling mechanism is adjusted in 27 ℃, adhesion is out of control for a certain reason when first group of temperature-controlling mechanism, second group of reserve comes into operation when temperature is increased to 27 ℃, makes temperature constant in 27 ℃, unlikely causing damage.But this way causes the structure more complicated, uses, adjusts trouble, adjust twice temperature respectively, and the monoblock type constent temperature heater is difficult to hold two cover guiding mechanisms owing to compact to design.

The present utility model purpose is to overcome the deficiencies in the prior art, invents a kind of new type auto constent temperature heater, and it can control temperature accurately and reliably, and is safe in utilization, good looking appearance and be easy to change the different heater of power.

The utility model adopts the grafting Combination Design of monoblock type constent temperature heater, and " dull two fixed " design and controllable silicon major loop of bimetal leaf temperature-controlling mechanism triggers the loop, and two controls contact no-spark circuit design reaches purpose of the present invention.

Below in conjunction with drawings and Examples the utility model is done further and carefully to be stated.

The utility model adopts combined integratedization of grafting of monoblock type heated at constant temperature, (Fig. 1).1 is radiator valve, and 2 is heater, and thermometer 3 is housed in the radiator valve, U type bimetal leaf temperature-controlling mechanism 4, and resistance wire 6 is equipped with in printed board 5 in the heater, ceramics 7.Socket 8 is arranged, the resistance wire lead-out wire plug 9 of heater in the printed board of the printing of radiator valve.Radiator valve and heater housing adopt the different-diameter glass tube respectively, and one of heater glass tube is airtight, and one with double-deck plug 10 sealing of pegging graft, and the resistance wire terminal pin is drawn by plug.One of radiator valve is airtight with plug, and power line is drawn by plug, and one uncovered, and then the plug of heater screws in the glass tube of radiator valve, and the resistance wire terminal pin inserts on the socket of radiator valve printed board.Therefore in using, rotate gently about two glass tubes need only and can peg graft, potted circuit is connected simultaneously, changes very convenient.Two pipe upper-lower seal are isolated, and no hot-air flows, and has removed hot interference temperature control error.The double-layer seal plug adopts medical turned welt plug, two glass tubes adopt the test tube of anti-the burning, the heater test tube adopts 18 * 180, the radiator valve test tube adopts 25 * 180(not have the end), resistance wire adopts φ 02 nickel chromium triangle coiled spring-like 120W/220V, thermometer is with-50 ℃---and+50 ℃, 20 * 55(mm).

The utility model adopts bimetal leaf temperature control guiding mechanism (Fig. 2), and we are referred to as " dull two fixed " design.It is the U type that two groups of bimetal leafs is processed into disjunctor.Two groups of silver contacts one (11) are on the U matrix, and other end (12) are installed in the printed board.The different silver contact of used thickness makes two groups of bimetal leaf temperature control mechanisms form the alternate position spike of 1mm.This alternate position spike can make two groups of bimetal leaf temperature control mechanisms keep about 2 ℃ temperature difference, and temperature difference is protected in closing that promptly we require fully.Dull two decide mechanism and can guarantee under the temperature condition of adjusting arbitrarily, back-up protection temperature+2 ℃ are followed the tracks of simultaneously automatically and to be adjusted, that is to say when the thermostat temperature of adjusting is 25 ℃, the back-up protection temperature also just the while automatic adjusting be 27 ℃.When the thermostat temperature of adjusting is 26 ℃, the back-up protection temperature just simultaneously automatic adjusting be 28 ℃.By that analogy, realized the automation adjustment of back-up protection fully.The bimetallic temp-controlling element adopts bimetallic U matrix, and material 5J16, thickness are 02, and sheet metal length is 50mm, and each sheet metal width is 5mm, and two gaps are 5mm.

The utility model adopts dull two controllable silicon constant temperature control circuit (Fig. 3) of deciding.It is by resistance wire, and bimetal leaf temperature-controlling mechanism and controllable silicon are formed.Two groups of contacts of bimetal leaf temperature-controlling mechanism are the thermostatic control switch for one group, and one group is the back-up protection switch.Resistance wire, back-up protection sheet metal switch and controllable silicon form series circuit and insert the 220V power supply, and the end from resistance wire and thermostatic control sheet metal switch joins simultaneously, and the other end is connected in series a resistance again and links silicon controlled control grid.Like this, the controllable silicon major loop is subjected to the back-up protection mechanism controls, triggers the loop and is subjected to temperature control bimetal leaf mechanism controls.The contact has only the silicon controlled trigger current about 2mA to pass through, and will never produce ablation, adhesion, and accuracy of temperature control also improves greatly.Puncture even controllable silicon occurs, major loop bimetallic temperature control mechanism guarantees that also the temperature rising is no more than 2 ℃ and just comes into operation.Make temperature constant again in the temperature higher 2 ℃ than the temperature of adjusting.Use dull pair of silicon controlled to decide the bimetal leaf temperature-adjusting circuit, can be described as the high precision temperature control circuit of high safety factor.Bidirectional triode thyristor adopts TLC336A, resistance R ₅Be 47K1/8W.

Fig. 1 is the utility model shape assumption diagram.1 is radiator valve, and 2 is heater, and 3 is thermometer, and 4 is U type bimetal leaf temperature-controlling mechanism, and 5 are printed board, and 6 is resistance wire, and 7 is ceramics, and 8 is socket, and 9 is plug, and 10 is double-deck plug.

Fig. 2 is the utility model bimetal leaf temperature-controlling mechanism.11 is one of silver contact, is contained on the U matrix; 12 is the silver contact other end, is contained in the printed board.

Fig. 3 is the dull two controllable silicon constant temperature control circuit electrical schematic diagrams of deciding of the utility model.

The utility model advantage is:

1. adopt the grafting combination of monoblock type constent temperature heater, easy to use, heater can easily be changed and good looking appearance.

2. it is dull two fixed to adopt, and adjusts job simplification, and cost reduces.

3. adopt dull pair of controllable silicon to decide constant temperature control circuit, make temperature-controlled precision improve, prolong service life greatly.

Claims

1, a kind of new type auto constent temperature heater, by the heater of forming by resistance wire, it is characterized in that its one of heater housing glass tube airtight one with the sealing of pegging graft of double-deck plug, the resistance wire terminal pin is drawn by plug; Its radiator valve is made up of thermometer, U type bimetal leaf temperature-controlling mechanism, printed board, and thyristor and socket are arranged in the printed board, and its radiator valve outer casing shell Guan Yitou closes with plug, and power line is drawn by plug, and one uncovered; The heater glass tube is different with the radiator valve diameter glass tube, and the plug of heater glass tube can screw in the radiator valve glass tube, and its resistance wire terminal pin inserts on the radiator valve printed-board receptacle.

2, new type auto constent temperature heater according to claim 1, the U type bimetal leaf temperature-controlling mechanism that it is characterized in that its radiator valve is the U type that is processed into disjunctor with two groups of bimetal leafs, one of two groups of silver contact is on the U matrix, the other end is in printed board, and two groups of different silver contacts of used thickness make two groups of sheet metal temperature control mechanisms form the 1mm alternate position spike.

3, new type auto constent temperature heater according to claim 1; it is characterized in that the dull two controllable silicon constant temperature control circuits of deciding of its employing; it is made up of resistance wire, U type bimetal leaf temperature-controlling mechanism and controllable silicon; resistance wire, back-up protection sheet metal switch and controllable silicon form series circuit and meet 220V; resistance wire, thermostatic control sheet metal switch, the resistance of going here and there connects the SCR control grid.