CN209375958U - A kind of ptc heater - Google Patents

Abstract

A kind of ptc heater, by cooperating draw technique guaranteeing leakproofness simplified production technology simultaneously after silica gel plug is arranged in circular metal heating tube both ends, by L-type aluminium strip by being uniformly and intimately spirally wound in circular metal heating tube around blade technolgy, form radiating fin, due to the sealing instead of traditional liquid silica gel, eliminate curing time, production cycle is greatly shortened, facilitate the Automation Design of technique, and spiral winded type radiation fin structure, low manufacture cost, versatility is good, the heat sink strip of production fixed length is not needed, and avoid the surface polishing of heat sink strip, there is no aluminium powder dust, without using binder, there is no the release of toxic gas, it is more environment-friendly and safer.

Description

A kind of ptc heater

Technical field

The utility model relates to electricity field more particularly to PTC heating technique, especially a kind of ptc heater field.

Background technique

In the prior art, PTC ceramic element and electrode member, insulating paper etc. are filled in aluminum pipe and compressed by ptc heater, then Increase radiator on aluminum pipe.Heat spreader structures generally have corrugated cooling strip and aluminum pipe bonding, or perforate and fix on aluminum pipe Radiating fin radiates, or also has and form fin by machining to radiate on aluminum pipe.Above scheme has the drawback that Cost of manufacture is high, for example corrugated cooling strip needs vacuum brazing, and surface needs polishing, gluing, solidification etc. when bonding；Perforation dissipates Hot fin, needs mold to form, and assembling speed is slow；Aluminum tube surfaces machine the complex process of fin, and cost is also high.Waterproofing grade Difference needs to reach certain waterproofing grade in aluminum pipe both ends sealed silicone, and the curing time of silica gel is longer, influences to produce Beat, and sealing effect is unstable.Heat sink strip poor universality, different products need the different radiator of length.Heating Device power is easy to aging, and PTC ceramic element is assemblied in aluminum pipe, and when PTC ceramic element adstante febre, aluminum pipe pressure can be caused by expanding with heat and contract with cold Clamp force becomes smaller, and thermal resistance increases, and specific manifestation is exactly power attenuation.

Utility model content

The purpose of this utility model is that in view of the above-mentioned drawbacks in the prior art, providing a kind of novel ptc heater knot Structure.

Its main operational principle is by cooperating draw technique protecting after silica gel plug is arranged in circular metal heating tube both ends It demonstrate,proves leakproofness and simplifies production technology simultaneously, L-type aluminium strip is uniformly and intimately spirally wound on circular metal by winding process and is added On heat pipe, radiating fin is formed, aluminium strip versatility is good and saves polishing and bonding process.

To achieve the above object, the utility model is using following technical scheme: ptc heater, including aluminum profile electrode strip, PTC ceramic element, insulating film and the round metal tube as heating tube, which is characterized in that the PTC ceramic element is in rectangular Body, including a top surface and a bottom surface, the aluminum profile electrode strip are that cross section is semicircular strip and quantity is two, Two aluminum profile electrode strips are respectively overlay on the top and bottom of the PTC ceramic element, the PTC ceramic element and It being wrapped up on the outside of the aluminum profile electrode strip by the insulating film multilayer, the round metal tube is set in the insulating film periphery, Silica gel plug is arranged in the round metal tube both ends, and round metal tube inner wall of the round metal tube after the draw is handled makes The insulating film, the PTC ceramic element and the aluminum profile electrode strip are in close contact, and the silica gel plug and the circle The inner wall of metal tube is also in close contact, and radiating fin is arranged on the outside of the round metal tube, and the radiating fin is L by cross section The aluminium strip of type is uniformly and intimately spirally wound on the outside of the round metal tube and constitutes.

Further, the round metal tube is the metal tube of stainless steel material or other materials.

The utility model compares with prior art, and effect is positive and apparent.The utility model is not due to needing Sealed silicone solidification is waited, the production cycle is greatly shortened, and facilitates the Automation Design of technique, and spiral winded type radiating fin Structure, low manufacture cost, versatility is good, does not need the heat sink strip of production fixed length, and avoids the surface polishing of heat sink strip, does not have There is aluminium powder dust, does not use binder, the release of toxic gas, not more environment-friendly and safer.

Detailed description of the invention

Fig. 1 is the structure chart of the utility model.

Fig. 2 is the side view of the utility model.

Fig. 3 is the aluminium strip side view that fin is processed in the utility model.

Fig. 4 is the structure chart of the utility model fin.

Specific embodiment

Embodiment:

As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, a kind of ptc heater, including aluminium strip electrode strip 1, PTC ceramic element 2, absolutely Velum 3 and round metal tube 4 as heating tube, which is characterized in that the PTC ceramic element 2 is in cuboid, including one Top surface and a bottom surface, the aluminum profile electrode strip 1 are that cross section is semicircular strip and quantity is two, two aluminium Profile electrode strip 1 is respectively overlay on the top and bottom of the PTC ceramic element 2, the PTC ceramic element 2 and the aluminium 1 outside of profile electrode strip is wrapped up by 3 multilayer of insulating film, and the setting of round metal tube 4 is in 3 outside of insulating film, institute State 4 both ends of round metal tube setting silica gel plug 5, the inner wall of the round metal tube 4 round metal tube 4 after the draw is handled It is in close contact the insulating film 3, the PTC ceramic element 2 and the aluminum profile electrode strip 1, and the silica gel plug 5 and institute The inner wall for stating round metal tube 4 is also in close contact, and be can be convenient and is realized IP67, it might even be possible to the waterproofing grade for reaching IP68, it can To be directly used for a long time in water, radiating fin 7 is set, by the way that around piece machine, cross section is L-type on the outside of the round metal tube 4 Aluminium strip 6 pull into the continuous helical shape of the inner long side of short side outwardly and be uniformly and intimately wrapped in the 4 outside structure of round metal tube At the radiating fin 7, since aluminium strip short side is tightly attached to heating pipe outer wall by aluminium strip deformed tension, so need not be additional Fixation ensure that radiating efficiency.

Further, the round metal tube is stainless steel material, since the thermal expansion coefficient of stainless steel tube is closed lower than aluminium Gold, in the case where expanding with heat and contract with cold for a long time, wrapping power and will not becoming smaller for stainless steel tube makes the power aging degree of heater very It is small.

Claims (2)

1. a kind of ptc heater, including aluminum profile electrode strip, PTC ceramic element, insulating film and as the circle gold of heating tube Belong to pipe, which is characterized in that the PTC ceramic element is in cuboid, including a top surface and a bottom surface, the aluminum profile electrode Item is that cross section is semicircular strip and quantity is two, and two aluminum profile electrode strips are respectively overlay in the PTC pottery On the top and bottom of porcelain element, wrapped up on the outside of the PTC ceramic element and the aluminum profile electrode strip by the insulating film, The round metal tube is set in the insulating film periphery, and silica gel plug, the circular metal is arranged in the round metal tube both ends Pipe inner wall of the round metal tube after the draw is handled makes the insulating film, the PTC ceramic element and aluminum profile electricity Pole item is in close contact, and the inner wall of the silica gel plug and the round metal tube is also in close contact, outside the round metal tube Radiating fin is arranged in side, and the radiating fin is uniformly and intimately spirally wound on the round gold by the aluminium strip that cross section is L-type Belong to and being constituted on the outside of pipe.

2. ptc heater as described in claim 1, which is characterized in that the round metal tube is including stainless steel material Metal tube.