CN2354303Y - Electronic heater - Google Patents

Abstract

An electronic warmer comprises a tube, a heating wire arranged at the inner bottom of the tube, and a temperature control circuit, wherein the circuit controls the starting time of the heating wire by the temperature sensing of a thermistor, and the electronic warmer is mainly characterized in that: the circuit uses a relay to control the electrifying of the heating wire, and the upper cover of the circuit is provided with an integrally formed protruding chamber for the arrangement of a thermistor; when the temperature control circuit is implemented, the relay and the thermistor can be separated by the circuit board, and the interior of the pipe can be vacuumized to remove heat transfer medium, so that the temperature control circuit can not produce high heat and can not produce interference electric wave except for heating wire, and the sensing portion of the thermistor can extend into water to accurately sense water temperature.

Description

The electronic type warmer

The utility model is at the structural improvement of Shui nationality warmer, refers to a kind of temperature control circuit integration can being included in the pipe especially, and its temperature control circuit self can not produce high heat and send the interference electric wave except that heater wire, and the new-type electronic type warmer of the accurate perception water temperature of energy.

The Shui nationality warmer of traditional type, its aufbauprinciple is the control circuit that alloy heater wire and contains bimetal leaf to be set form in the glass tube of folk prescription opening, its opening is established cap seal and is closed to reach watertight, while also makes one to transfer bar to the bending part to bimetal leaf, nationality is to put the water temperature of regulation and control fish jar in water, make temperature cross low bimetal leaf contact and touch conducting startup heating, temperature reaches a regularly contact tripping outage voluntarily, makes cylinder water maintain the constant temperature scope of a summary.Its structure is reached because of the physical characteristic that adopts mechanical type to expand with heat and contract with cold, and so temperature control effect misses by a mile, reaches ± 1 ℃～2 ℃ scope, needs frequent adjustment contraposition uses in, can only be used as the low quality use at most.Can't reach regulating and controlling effect accurately because the applied hierarchy of skill is low, so the finished product unit price is low, profit is also meagre relatively.Another kind of advanced warmer is to control with electronic type as shown in Figure 6 to reach, since its temperature control accuracy can reach ± 0.3 ℃, so can guarantee to maintain in the cylinder temperature constant state once levelling Hou, comparatively convenient in the use, need not adjust again and again, be the middling that is worth exploitation, but its structural design has following shortcoming:

1. the temperature control circuit of electronic type mainly is to realize with the TRIAC transistor, and the noise that produces during its triggering and conducting can cause the interference phenomenon of EMI to general electrical equipment.

2. the part built-up circuit of electronic type control is bulky, can't receive in the pipe, and its regulation and control partly all should be provided with housing separately and pull strings and be fixed in pipe and use outer the separation, but transfer the bar disjunctor not as existing single hose warmer adjustments in and establish such conveniently unanimity.

3. all reach on the temperature monitoring with thermistor, add that its thyristor itself has the heating phenomenon again, if envelope is ensconced the precision that can cause the gross error on the thermistor temperature-sensitive in the pipe and have influence on temperature control, therefore correct sensing water temperature, so be generally the accuracy of asking temperature control, sensing partly should be led be located at outside.

In addition, though the structural design of existing product also has thermistor envelope ensconced and goes up capping and relatively save the easily design of processing of cost as shown in Figure 7 in the past, but because of not being provided with good deadening measure in managing, make heating-up temperature produce malfunction through going out the accuracy that the width of cloth is penetrated and have influence on thermistor by hot two approach of conduction that rise of air, and cover the coating that set prominent chamber really breaks away from the lid colloid in fact not yet, adjoined water surface and form obstacle on the temperature-sensitive effectively, for the foregoing reasons, its structure can't produce accurate temperature control effect on using, be the disadvantage of this product.Zong, the wanner design of existing electronic type is not can cause temperature-sensitive inaccurate as Fig. 7, exactly form pulling strings of many unfavorable processing and hinder speed of production, increase manufacturing cost on its body as Fig. 6.

Main purpose of the present utility model provides and a kind ofly can effectively reduce cost, control circuit concentrated be located in the body, appearance need not be pulled strings separately and can not produce the new-type electronic type warmer that electrical equipment disturbs.

Secondary objective of the present utility model provides a kind of sensing partly can being located in the pipe disjunctor envelope Tibetan, can normally accurately predict water temperature and avoid managed interior heating-up temperature influence to produce the electronic type warmer of malfunction.

Another order of the present utility model provides a kind of new-type scale that can conveniently be additional to above-mentioned electronics warmer and shows the adjustment structure.

The utility model is achieved in that it includes: a body, is located at the heater wire at the end in the body, and a temperature control circuit constitutes, and wherein this circuit is the startup opportunity of controlling heater wire with the thermistor temperature-sensitive, it is characterized in that; This circuit is provided with the relay of control heater wire energising, and its loam cake has integrally formed prominent chamber and inserts for thermistor again.Take this, except that heater wire, self can not produce high heat and send the situation of disturbing electric wave and make this add circuit temperature, and the sensing of this thermistor partly can be stretched again and reach accurate perception water temperature in the water, and whole effectively integration can reduce assembly cost and improve the practicality of product.

Wherein, this relay and thermistor are separated by circuit board, mica sheet and high-temperature insulation tagma.

Wherein, this relay is positioned at the circuit board bottommost, is communicated with the dice-circuitry plate institute fixing of tabula by another, establishes at the both sides edges of boards of dodging relay to connect the hole and divide into heater wire with binding.

Wherein, the prominent chamber of this loam cake is made by the thin material that the colloid lid extends.

Wherein, this body inside should be evacuated.

Wherein, loam cake is equipped with one and transfers bar, the beneath variable resistor of this bar over against temperature control circuit, shaft is retained on the circuit board by a holder, variable resistor outer sheathed one is and then adjusted the collar of turn again, its anchor ring is provided with scale, and pointer can point to the scale of anchor ring interlock to express the temperature of being adjusted when the accent bar was rotated.

The utility model characteristics are that the structural design novelty is effective, can overcome the various shortcoming of existing product on making, and its integration is included in together be located in the body, and accurate raising of temperature-sensitive and inhibition wave interference are all had tangible improvement.

Fig. 1 is a stereogram of the present utility model.

Fig. 2 is a sectional perspective exploded view of the present utility model.

Fig. 3 is a combination view of the present utility model.

Fig. 4 inserts application schematic diagram in the cylinder for the utility model.

Fig. 5 heats for the utility model and adds the three-dimensional appearance of transferring the bar scale to show.

Fig. 6 is existing electronic type warmer structural representation.

Fig. 7 is another kind of existing electronic type warmer structural representation.

As shown in Figure 1, 2, the electronic type warmer structure that the utility model is set, it also possesses the heater wire 20 that a body 10, is located at the ends in the body 10 basically, and a temperature control circuit 30 constitutes, and wherein this circuit is the startup opportunity of controlling heater wire 20 with thermistor 40 as temperature-sensitive.In addition as attractive in appearance for stressing, the also available on the whole heat-resisting paper 11 with empty window only allows heater wire 20 positions that are provided with expose the whole ring seal of internal structure, but and printing word or pattern on its heat-resisting paper, and the main improvement part of structure is:

This temperature control circuit 30 is energisings of controlling heater wire 20 with relay 31, and be provided with integrally formed prominent chamber 60 at the loam cake 50 of body 10, insert for thermistor 40, the heater wire 20 of isolating the lower end with mica sheet 32 and high-temperature insulation body 33 respectively in the lower end of relay 31, its binding post 34 is located at therebetween, and start energising opportunity of heater wires 20 with this relay 31 of thermistor 40 temperature-sensitives of upper end control lower end, take this to make this temperature control circuit 30 except that heater wire 20, self can not produce high heat and send the interference electric wave.

Wherein, circuit is to dwindle in the SMT mode as far as possible during concrete enforcement, so that reach the functional need that can be placed in the body 10, and do relay 31 and thermistor 40 to be separated and open and set up upper/lower terminal separately with circuit board 39 in the configuration, to avoid being subjected to relay 31 coil electricity warming-up effects to cause deviation on the temperature-sensitive to thermistor 40, relay 31 is the bottommosts that are positioned at circuit board 39 during composition, be communicated with 38 fixings of dice-circuitry plate of tabula by another, and establish at the both sides edges of boards of dodging relay 31 and to connect the heater wire 20 that the hole divides into binding.

In addition, as shown in Figure 3, its loam cake set prominent chambers 60 50 are made by the thin material of colloid lid extension, after thermistor 40 is inserted, its sensing partly can project upwards, the scope of lid that contains that breaks away from loam cake 50 solid coatings, so in the application as shown in Figure 4, stretch into the variation that senses water temperature in the water really around its prominent chamber 60, can accurately realize start-up control, and the more important thing is that its global design is the startup opportunity with relay 31 control heater wires 20, so this temperature control circuit 30 self can not produce high heat and send the interference electric wave except that heater wire 20, add that its relay 31 significantly separates again with thermistor 40,, be different from the greatest feature of existing structure for the utility model so can not take place because of the phenomenon of too pressing close to cause error on the temperature-sensitive.

Referring to shown in Figure 3, the utility model also can be to the body 10 inner technological means that vacuumize of implementing when warmer is made, the air heat transfer medium is removed, make the only surplus width of cloth in inside penetrate heat and can not produce and conduct heat, can allow the influence degree of thermistor 40 managed interior heating ascending temperatures minimize effectively, that is relatively make temperature-sensitive reach more accurate.

Referring to shown in Figure 5, the utility model can be provided with the disjunctor unanimity on heating tube when implementing scale shows the adjustment structure, cover 50 thereon and wear an accent bar 51, make the beneath variable resistor 32 of this bar over against temperature control circuit 30, the middle part of bar also is stuck on the circuit board 39 by 52 fixings of a holder, and it goes up and be provided with the pointer 53 of an indicating graduation; Then sheathed one collar 54 of and then adjusting turn on variable resistor 32, on its anchor ring, be provided with scale 55, the scope of indication is by 20 ℃～35 ℃, so can make when transferring bar 51 to rotate, pointer 53 just and then points to the scale 55 of anchor ring interlock, and clearly demonstrates the temperature value that will be transferred to, uses easy, and processing and manufacturing also saves cost, this design also be existing electronic type warmer can't reach so far functional.

Claims (6)

1. An electronic heater, characterized in that: it comprises a tube body, a heating wire arranged at the bottom of the tube body, and a temperature control circuit, wherein the temperature control circuit uses a thermistor to sense temperature The timing for controlling the start of the heating wire is characterized in that the temperature control circuit is provided with a relay for controlling the energization of the heating wire, and its upper cover has an integrally formed protruding chamber for the thermistor to be placed in. 2. The electronic heater as claimed in claim 1, wherein, the relay and the thermistor are separated by a circuit board, a mica sheet and a high temperature resistant insulator. 3. The electronic heater as claimed in claim 1, wherein, the relay is located at the bottom of the circuit board, held by another small circuit board connected to the horizontal partition, and on the sides of the side boards of the avoidance relay. Connecting holes are provided to connect the heating wires below. 4. The electronic heater as claimed in claim 1, wherein the protrusion of the upper cover is made of a thin material extending from the rubber cover. 5. The electronic heater as claimed in claim 1, wherein the inside of the tube should be evacuated. 6. The electronic heater as claimed in claim 1, wherein the upper cover is pierced with an adjusting rod, the bottom of the rod faces the variable resistor of the temperature control circuit, and the rod body is held by a fixed seat On the circuit board, a collar that rotates along with the adjustment is installed outside the variable resistor. There are scales on the ring surface, so that when the adjusting rod is rotated, the pointer can point to the scale that is linked to the ring surface to express the adjusted temperature.

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