CN2232651Y

CN2232651Y - Whole-line control temp. compound heating cable

Info

Publication number: CN2232651Y
Application number: CN 95241899
Authority: CN
Inventors: 朱荣炎
Original assignee: CHENGDU DAILY USE ELECTRIC APPLIANCE FACTORY
Current assignee: CHENGDU DAILY USE ELECTRIC APPLIANCE FACTORY
Priority date: 1995-07-17
Filing date: 1995-07-17
Publication date: 1996-08-07
Anticipated expiration: 2005-07-17

Abstract

The utility model relates to a whole-line control temp. compound heating cable, comprising an electricity heating line structure and a transducer conducting wire structure which are comparted by a eutectic and insulated material layer, wherein a metal transducer conducting wire is made as a core whose outside is provided with the electricity heating line and the outer insulation after packed by the eutectic and insulated material layer.

Description

All fronts temperature control compound electro-thermal line

The utility model relates to and to have sensing security personnel effect, though thereby can preferentially be not limited only to all fronts temperature control compound electro-thermal line of electric blanket use.

With the electric heating appliance of resistor-type heating wire, can cause accident because of superheating phenomenon in some cases as pyrotoxin.With the electric blanket is example, and local overheating can cause serious accidents such as burning, personnel's electric shock to take place.For this reason, it is core with materials such as glass fibre or synthetic fibers that Chinese patent 91230106.6 has reported a kind of, and its outer separation mutually with meltable insulation material layers such as nylon is all fronts temperature control compound electro-thermal line that the reverse acting spiral form is wound with internal layer electricity heating line and outer security personnel's transducer wire structure respectively.When the part take place overheated, the meltable insulation material layer between these position two layer conductors because of have with temperature raise resistance sharply the characteristic fusion of reduction by two layer conductors are overlapped mutually, start-up control circuitry cuts power supply source and guarantee safe in utilization.In this compound electro-thermal line because of electricity heating line is within the meltable insulation material layer, so outwards the temperature gradient of heat transfer is big during work.Electricity heating line is reverse acting spiral with security personnel's transducer wire and twines not only processing technology complexity, and require the temperature coefficient of resistance of sense line big, the controlling organization supporting with it is also complicated, thereby manufacturing cost height, and just be positioned at neutral gear place between two helixes when the fusion position of meltable insulation material layer, then its sensing sensitivity can be greatly affected.Simultaneously, the mechanical strength of this compound electro-thermal line is also relatively poor.

The purpose of this utility model is to provide a kind of structure more simple at the problems referred to above, mechanical strength height, the reliable and stable and simple temperature control compound electro-thermal completely of the manufacturing process line of protection sensing capabilities.

All fronts of the present utility model temperature control compound electro-thermal line still has by the separated electricity heating line of the meltable insulation material layer of routine and security personnel's transducer wire structure, wherein with the metal transducer wire that plays security personnel's conduction as core, behind meltable insulation material layer parcel, be outside equipped with spirality at it and twine or the electricity heating line and the outer insulation of other appropriate format.Wherein as the metal transducer wire of core can for the multiply strand around the plain conductor form, also can be the single cord form, wherein with the multiply form for well.Owing to adopted plain conductor as core, the mechanical strength of compound electro-thermal line significantly improved.In use, local overheating anywhere takes place make meltable insulation material layer fusion, electricity heating line all can be immediately and metal transducer wire overlap joint as core, and security personnel's performance is more reliable and more stable.On the other hand, electricity heating line is near the top layer, and the heat transfer temperature gradient reduces, and heat transfer efficiency improves.Cancel reverse double helix winding process, also simplified production operation, reduced cost.

Below be described further, but scope of the present utility model is not limited only to down example with example shown in the drawings.

Fig. 1 structure of the present utility model

As shown in the figure, this example core 1 of temperature control compound electro-thermal line completely is a multiply type plain conductor, play the effect of security personnel's sensing, it is wrapped with the meltable insulation material layers 3 such as nylon of one deck routine, and this meltable insulation material layer is wound with one deck electricity heating line 2 outward in a spiral manner.Outermost layer is common heatproof insulating material layer 4.

Claims

1, a kind of all fronts temperature control compound electro-thermal line, have by separated electricity heating line of meltable insulation material layer and transducer wire structure, it is characterized in that with the metal transducer wire as core (1), behind meltable insulation material layer (3) parcel, be outside equipped with electricity heating line (2) and outer insulation (4) at it.

2, compound electro-thermal line as claimed in claim 1 is characterized in that said core (1) is a multiply type metal transducer wire.

3,, it is characterized in that said electricity heating line (2) is the spiral canoe as the compound electro-thermal line of claim 1 or 2.