CN101438986A

CN101438986A - Electric heating bag of built-in double helix electric heating wire

Info

Publication number: CN101438986A
Application number: CNA2007100317651A
Authority: CN
Inventors: 邓建威
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-25
Filing date: 2007-11-25
Publication date: 2009-05-27
Also published as: WO2009065289A1

Abstract

The invention discloses an electric heating bag which is provided with a double helix heating wire internally. The electric heating bag comprises a bag body which is provided with a bag cavity and is equipped with an electric control gear. The bag cavity is filled with the double helix heating wire which is connected with the electric control gear electrically. The electric heating bag with the double helix heating wire internally is provided with the double helix heating wire in the bag body used as an electric heating element, has very high bending resistance and is not pressed and deformed easily; and furthermore, the double helix heating wire can achieve the effect of the complete temperature control of the bag body and is good for the bag body to be heated in a balanced way.

Description

The electric warming bag of built-in Double helix heating wire

Technical field

The present invention relates to a kind of electric warming bag, especially a kind of electric warming bag of built-in Double helix heating wire.

Background technology

China's utility model patent number: ZL200320120843.2 discloses a kind of " soft electric warm water bag ", its Granted publication number: CN2665572Y, and Granted publication day: on December 22nd, 2004; The electric warm water bag of this structure comprises a bag body, socket cover, seal receptacle, heating wire and liquid injection hole, also is provided with the high-resistance heating wire of low temperature that power density is not more than 50 watts/meter in the described bag body, and this heating wire is agglomerating or overlap agglomerating.The electric warm water bag of said structure, by heating wire to the intravital liquid heat of bag.But, 1), the electric warm water bag of this structure the electric warm water bag of said structure has the following disadvantages:, adopted common heating wire as electrical heating elements, this heating wire is agglomerating or overlap agglomeratingly with irregular form, and directly is placed on the bag inner chamber to liquid heat; Because bag is a flexible instrument, the flexural strength of heating wire is very low, and the easy deformation of its pressurized influences the heats of bag, even causes damage; Moreover the heating wire that is wound in bulk also causes easily and gets loose; 2), used the electric warming bag of this heating wire, do not reach the purpose of temperature control completely; 3), heating wire twines the big position of density and is heated higherly in the bag, heating wire twines the little position of density and is heated lowlyer, and it is unbalanced to cause bag integral body to be heated; 4), to twine heating wire agglomerating or be overlapped to form bulk, its troublesome poeration.

Summary of the invention

The objective of the invention is to solve above-mentioned the deficiencies in the prior art, and provide a kind of simple and reasonable for structure, heating wire flexural strength height, and can reach temperature control completely is with the electric warming bag of the built-in Double helix heating wire that improves the temperature control accuracy.

The object of the present invention is achieved like this:

A kind of electric warming bag of built-in Double helix heating wire comprises the bag with bag chamber, and bag is provided with electric control gear, and described bag intracavity is equiped with the Double helix heating wire, and the Double helix heating wire is electrically connected with electric control gear.The Double helix heating wire is set as electrical heating elements in bag, its flexural strength is very high, is difficult for pressurized deformation; Moreover the Double helix heating wire can be realized the bag effect of temperature control completely, helps its integral body and is subjected to thermal balance.

Purpose of the present invention can also adopt following technical measures to solve:

Described Double helix heating wire comprises mandrel, internal layer PTC spiral resistance wire, NTC heat-sensitive layer, outer spiral resistance wire and external insulation layer respectively by innermost layer to outermost layer.The Double helix heating wire of this structure, its mandrel play fixedly internal layer PTC spiral resistance wire effect; Internal layer PTC spiral resistance wire has ptc characteristics, that is: PTC positive temperature coefficient, and high more its resistivity of temperature is big more, can export temperature variant signal in real time; The NTC heat-sensitive layer has the NTC characteristic, that is: NTC negative temperature coefficient, and high more its resistivity of temperature is more little, can export temperature variant signal in real time equally; It is heating function that outer spiral resistance wire mainly acts on; And external insulation layer mainly is the electric insulation effect.

Also be provided with controllable silicon or comparator on the described bag, controllable silicon or comparator are electrically connected with described Double helix heating wire.Have the Double helix heating wire of PTC and NTC characteristic, utilize its sensing characteristics, be equipped with electronic control circuit; With the controllable silicon is example, and along with temperature change in the bag, Double helix heating wire control thyristor operating angle size, and then automatic feedback control heating wire size of current because the Double helix heating wire all has sensing characteristics in the road completely, therefore, reach the effect of circuit temperature-controlling completely.

Be provided with the location heat sink in the described bag, have several line holes on the heat sink of location, the Double helix heating wire passes described line hole and is fixed on the heat sink of location.By default line hole on the heat sink of location, the layout of Double helix heating wire is more become evenly, that is, the heating of Double helix heating wire is more even; Moreover two spiral shell heating wires can be by location heat sink heat radiation, its better heat-radiation effect.

The invention has the beneficial effects as follows:

1), the electric warm water bag of this structure, adopted Double helix heating wire with PTC and NTC characteristic, this Double helix heating wire also has very strong flexural strength, pressurized is difficult for deformation; Moreover the Double helix heating wire is equipped with electronic control circuit, as: controllable silicon or comparator etc., make the Double helix heating wire reach the effect of circuit temperature-controlling completely, can realize the bag effect of temperature control completely, help its integral body to be subjected to thermal balance;

2), the Double helix heating wire do not need to be provided with agglomerating or overlaps agglomeratingly, it is simple and reasonable for structure, installs simple and easyly, and is difficult for getting loose.

Description of drawings

Fig. 1 is an electric warming bag structural representation of the present invention;

Fig. 2 is the Double helix heating wire sketch map of Fig. 1.

The specific embodiment

As depicted in figs. 1 and 2, a kind of electric warming bag of built-in Double helix heating wire comprises the bag 2 with bag chamber 1, and bag 2 is provided with electric control gear, and described bag is equiped with Double helix heating wire 3 in the chamber 1, and Double helix heating wire 3 is electrically connected with electric control gear.Described Double helix heating wire 3 comprises mandrel 301, internal layer PTC spiral resistance wire 302, NTC heat-sensitive layer 303, outer spiral resistance wire 304 and external insulation layer 305 respectively by innermost layer to outermost layer.

Also be provided with controllable silicon 4 or comparator on the described bag 2, controllable silicon 4 or comparator are electrically connected with described Double helix heating wire 3.Have the Double helix heating wire 3 of PTC and NTC characteristic, be equipped with electronic control circuit, as: controllable silicon 4 or comparator etc. make Double helix heating wire 3 reach the effect of circuit temperature-controlling completely.Described controllable silicon 4 or comparator can be selected to be arranged on electrical socket or the power line, as long as realize water-stop.

Be provided with location heat sink 5 in the described bag 2, have several line holes on the heat sink 5 of location, Double helix heating wire 3 passes described line hole and is fixed on the heat sink 5 of location.By default line hole on the heat sink 5 of location, the layout of Double helix heating wire 3 is more become evenly, that is, 3 heating of Double helix heating wire are more even; Moreover two spiral shell heating wires 3 can be by 5 heat radiations of location heat sink, its better heat-radiation effect.

For further improving safeguard protection, can in circuit, set up protective tube, with the break-make of control entire circuit to the bag heating; Protective tube also can be to be electrically connected with electric heating body; Is example with Double helix heating wire 3 as electric heating body, and electric heating body damages, and the liquid in the bag is charged, and at this moment, the protective tube open circuit protection is to realize the heated protective to bag.

Claims

1. the electric warming bag of a built-in Double helix heating wire, comprise the bag (2) with a bag chamber (1), bag (2) is provided with electric control gear, it is characterized in that, be equiped with Double helix heating wire (3) in the described bag chamber (1), Double helix heating wire (3) is electrically connected with electric control gear.

2. according to the electric warming bag of the described built-in Double helix heating wire of claim 1, it is characterized in that described Double helix heating wire (3) comprises mandrel (301), internal layer PTC spiral resistance wire (302), NTC heat-sensitive layer (303), outer spiral resistance wire (304) and external insulation layer (305) respectively by innermost layer to outermost layer.

3. according to the electric warming bag of the described built-in Double helix heating wire of claim 1, it is characterized in that, also be provided with controllable silicon (4) or comparator on the described bag (2), controllable silicon (4) or comparator are electrically connected with described Double helix heating wire (3).

4. according to the electric warming bag of claim 1 or 2 described built-in Double helix heating wires, it is characterized in that, be provided with location heat sink (5) in the described bag (2), have several line holes on the location heat sink (5), Double helix heating wire (3) passes described line hole and is fixed on the location heat sink (5).