Eins og við vitum öll er rafhitastrengjum skipt í stöðugt afl rafmagnshitakapla og sjálf-hitatakmarkandi rafmagnshitakapla, og stöðugt afl rafmagnshitakaplar er frekar skipt í röð stöðugt afl rafmagnshitakapla og samhliða stöðugt afl rafmagns hitastrengir. Fólk ruglar oft saman þessum tegundum af rafhitastrengjum og ekki er ljóst hver munurinn er á þessu þrennu. Hér er útskýrður munurinn á raðtengingu og samhliða tengingu stöðugra rafhitunarkapla og sjálf-hitatakmarkandi rafhitakapla.
1. Mismunurinn á röð stöðugra rafmagns hitastrengs og samhliða stöðugra rafmagns hitastrengs
1. The constant power electric heating cable in series cannot be cut, and the constant power electric heating cable in parallel can be cut.
2. The heating elements of the two are different: the series electric heating cable adopts nickel-chromium alloy wire (the metal bus inside is heated), and the parallel electric heating cable adopts nickel-chromium winding wire for heating (that is, the winding wire wound on the outside, the metal busbar inside to conduct electricity).
3. The parallel constant power electric heating cable is suitable for large tanks and pipelines with high temperature requirements and explosion-proof areas, and the series electric heating cable is suitable for long-distance pipelines such as oil long-distance pipeline heating and large-scale tank insulation.
2. Munurinn á rafhitunarkapalnum sem takmarkar sjálf-hitastigið og rafhitunarsnúrunni með stöðugu afli:
1. Working principle
Sjálf-hitatakmarkandi hitasnúra: Eftir að kveikt er á straumnum er straumurinn virkjaður af öðrum vírunum og færður í hinn vírinn í gegnum PTC kjarnann til að mynda lykkju og kjarninn með viðnámsgildi hitnar upp.
Stöðugur hitunarkapall: Þegar einangruðu vírinn er virkjaður fer straumurinn í gegnum hitunarvírinn og hitunarvírinn framleiðir hita og flytur varma.
2. Structural differences
Self-limiting temperature heating cable: PTC polymer conductive material is filled between the two wires.
Constant power heating cable: The copper-nickel heating wire is wound around the insulated wire and connected to the insulated wire at a distance.
3. Use environment
Self-limiting temperature tracing cable: used in places where the environment is not very complicated and the temperature requirements are not high.
Constant power heating cable: suitable for occasions where the user environment is more complicated and the temperature requirements are higher.
4. Use effect
Self-limiting temperature heating cable: It can adjust its own heating temperature according to the ambient temperature.
Constant power heating cable: the temperature remains unchanged, the calorific value and power are constant, and the stability performance is relatively strong.