CN201114793Y

CN201114793Y - An electrical warming bag with built-in dual spiral electrical heat line

Info

Publication number: CN201114793Y
Application number: CNU2007200573333U
Authority: CN
Inventors: 邓建威
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-24
Filing date: 2007-09-24
Publication date: 2008-09-10
Anticipated expiration: 2017-09-24

Abstract

The utility model discloses an electric thermal bag, in which a double helix heating wire is arranged. The electric thermal bag comprises a bag body provided with a bag cavity, an electric control device arranged on the bag body and the double helix heating wire installed in the bag cavity, wherein, the double helix heating wire is electrically connected with the electric control device. The electric thermal bag internally provided with the double helix heating wire of the utility model leads the double helix heating wire to be arranged in the bag body as an electric heating element, thus the flexural strength is very high and the deformation is not easy to occur when in compression; besides, the double helix heating wire can realize the effect of whole line temperature control of the bag body, which is favorable for balanced heating of the whole bag body.

Description

A kind of electric warming bag of built-in double helix heating wire

Technical field

The utility model 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, 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 liquid heat in the 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.

The utility model content

The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art, and provides a kind of simple and reasonable for structure, and 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 purpose of this utility model is achieved in that

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 is equiped with the double helix heating wire in the chamber, 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.

The purpose of this utility model 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 has been heating function that outer spiral resistance wire mainly acts on; And external insulation layer mainly is the insulating effect that electrifies.

Also be provided with controllable silicon on the described bag, controllable silicon is electrically connected with described double helix heating wire.Have the double helix heating wire of PTC and NTC characteristic, be 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.

The beneficial effects of the utility model are:

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 utility model;

Fig. 2 is the double helix heating wire schematic diagram of Fig. 1.

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 on the described bag 2, controllable silicon 4 is 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 can be selected to be arranged on electrical socket or the power line, as long as realize water-stop.

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) on the described bag (2), controllable silicon (4) is electrically connected with described double helix heating wire (3).