CN205847637U - A kind of spiral electrothermal tube - Google Patents

Abstract

The utility model discloses a kind of spiral electrothermal tube, including the shell arranged in the shape of a spiral, the trapezoidal shape in cross section of described shell, the described shell area near side, middle part is more than near outside area, described shell be internally provided with heating wire, the two ends of described heating wire wear out described shell two ends, and told shell two ends are provided with insulation tube, described heating wire is fed through described insulation tube, is provided with oxide isolation between described heating wire and described shell.This utility model has the following advantages and effect: the trapezoidal shape in cross section of shell and the shell area near inner side are more than the area in outside, therefore heats inside the shell is more, temperature inside shell rises very fast, water inside shell forms convection current with the water in outside, heating is more uniform, and heating wire heat production in the enclosure conducts heat by magnesia powder as oxide isolation, heat conductivility is good, and insulating effect is then played in the setting of earthenware.

Description

A kind of spiral electrothermal tube

Technical field

This utility model relates to a kind of heating electrical appliance original paper, particularly to a kind of helical heating pipe.

Background technology

Electrothermal tube has another name calledHeat-generating pipe、Add heat pipe, formal name used at school tubular electric heating element, metal tube is put into spiral shapeHeating wire(resistance wire), and about and gap is filled with the insulating powder of good heat resistance, heat conductivity and insulating properties, Heating wire both ends have eduction rod or lead-out wire picks out.It has simple in construction, and mechanical strength is high, the thermal efficiency is high, safety can Lean on, the feature such as simple installation, length in service life.

The cross section of spiral electrothermal tube of the prior art is generally circular in cross section, in heating process spiral electrothermal tube inner side Little with the heating effect difference in outside, therefore the water heating of the convection current of water, i.e. localized region can not be caused well comparatively fast, and Water heats farther out of adjusting the distance is poor, causes heating uneven.

Utility model content

The purpose of this utility model is to provide a kind of heats uniform spiral electrothermal tube.

Above-mentioned technical purpose of the present utility model has the technical scheme that a kind of spiral electrothermal tube, Including the shell arranged in the shape of a spiral, it is characterised in that: the trapezoidal shape in cross section of described shell, described shell is near side, middle part Area more than near outside area, described shell be internally provided with heating wire, the two ends of described heating wire wear out institute Stating shell two ends, told shell two ends are provided with insulation tube, and described heating wire is fed through described insulation tube, described heating wire and institute State and between shell, be provided with oxide isolation.

By using technique scheme, shell is in the shape of a spiral and cross section is trapezoidal, and shell is near the area of side, center More than the area outside it, thus during heating, the water in the middle part of shell can heat comparatively fast, and its outside aqueous phase pair Heating is relatively slow, therefore the water in water inside shell and outside can form the temperature difference, and the water inside shell can be formed with the water in outside and exchange, Thus more uniform to the heating ratio of water, improve heats, heating wire in the enclosure is used for producing heat, and oxide isolation Setting then for heating wire and shell are isolated, prevent outer casing electrification, improve security performance, it is also possible to by heating wire Heat is delivered on shell quickly, improves the efficiency of heating surface, the setting of insulation tube, will be able to close by internal oxide isolation Portion in the enclosure, prevents the loss of oxide isolation from reducing heat-conducting effect, is isolated the end of heating wire and shell, prevents electric heating Silk contacts with shell and causes outer casing electrification, improves security performance.

This utility model is further arranged to: described earthenware is solid by sealing between silica gel and heating wire and housing Fixed.

By using technique scheme, silica gel realizes fixing between earthenware and heating wire and housing, heating wire The part that will not protrude from housing will not be moved, and improves the stability of heating wire, but also can form sealing Effect, is enclosed in enclosure interior by oxide isolation, places the loss of oxide isolation, it is also possible to prevent water from entering into enclosure interior, Form conducting medium, improve security performance.

This utility model is further arranged to: described oxide isolation is magnesia powder.

By using technique scheme, magnesia powder has preferable heat conductivility, it is possible to rapidly by heating wire Heat be transmitted on housing heat, improve heats, and in the case of less than 1100 ° of C, magnesia powder has There are preferable insulating properties, it is possible to by being galvanically isolated on conductive filament, prevent outer casing electrification.

This utility model is further arranged to: the outer surface of described shell is provided with polytetrafluoroethylene floor.

By using technique scheme, politef has surface tension minimum in solid material, is difficult to adhere to Dirt, improves the tidiness of housing.

This utility model is further arranged to: described insulation tube is earthenware.

By using technique scheme, pottery has preferable insulating properties, and earthenware can be by heating wire and housing Isolation, housing does not comes in contact with heating wire, will not be transmitted on housing by the electric current on heating wire, improve security performance.

In sum, this utility model has the advantages that the trapezoidal shape in cross section of shell and shell are near inner side Area more than the area in outside, therefore heats inside the shell is more, and the temperature inside shell rises very fast, in shell The water of side forms convection current with the water in outside, and heating is more uniform, and heating wire heat production in the enclosure, by magnesia powder as oxygen Changing medium conduction heat, heat conductivility is good, and insulating effect is then played in the setting of earthenware, and arranging of polytetrafluoroethylene floor is permissible Prevent case surface from having dirt to adhere to, improve tidiness.

Accompanying drawing explanation

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

Fig. 2 is sectional view of the present utility model；

In figure: 1, housing；2, heating wire；3, insulation tube；4, oxide isolation；5, polytetrafluoroethylene floor.

Detailed description of the invention

Below in conjunction with accompanying drawing, this utility model is described in further detail.

As it is shown in figure 1, a kind of spiral electrothermal tube, including housing 1, housing 1 in the shape of a spiral, the trapezoidal shape in cross section of housing 1, In the middle part of housing 1, the area of side is more than the area in outside, so during heating, the water in the middle part of housing 1 can be inhaled for it The heat received is more relative to the water in outside, and water and outside water in the middle part of housing 1 have the temperature difference, in housing 1 outside and housing 1 The water in portion can form exchange, improves the uniformity of heating.

As in figure 2 it is shown, be internally provided with heating wire 2 at housing 1, heating wire 2 energising produces heat, heating wire 2 He It is additionally provided with oxide isolation 4 between housing 1, by oxide isolation 4, the heat on heating wire 2 is transmitted on housing 1, it is also possible to Being fixed heating wire 2, heating wire 2 will not be moved in housing 1, not easy fracture, and oxide isolation 4 is non-conductive, The electric current on heating wire 2 can also be prevented to be delivered to isolating between heating wire 2 and housing 1 on shell, improves safety Energy.

Oxide isolation 4 is magnesia powder, and magnesia powder has higher heat conductivility, and slow of speech Canis familiaris L. Canis familiaris L. is rapidly by heating wire 2 heats produced are transmitted on housing 1, improve the efficiency of heating, and when operating temperature is less than 1100 ° of C, magnesia powder There are preferable insulating properties, be possible to prevent the electric current on the heating wire 2 within housing 1 to be transmitted on housing 1, it is to avoid housing 1 Charged and produce safety problem.

Being additionally provided with insulation tube 3 between the two ends of housing 1 and heating wire 2, insulation tube 3 achieves heating wire 2 and housing 1 Between separation, be possible to prevent heating wire 2 to contact with housing 1 and cause housing 1 charged, improve security performance, but also permissible Magnesia powder being enclosed in housing 1 internal, magnesia powder will not run off from housing 1.

By silica gel sealing between insulation tube 3 and heating wire 2 and housing 1, improve sealing property, prevent magnesia powder Run off from housing 1, it is also possible to promoting heating wire 2 and the stability of insulation tube 3, heating wire 2 will not shake, the most easily broken Split.

Insulation tube 3 is earthenware, and pottery has preferable insulating properties, and hardness is higher, will not deform, and promotes Sealing effectiveness and the stability of heating wire 2.

Being also coated with polytetrafluoroethylene floor 5 outside housing 1, politef has prominent non-stick, is fabulous preventing Viscous material, so being not likely to produce dirt, improves tidiness.

This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model The present embodiment can be made after reading this specification by field technique personnel as required does not has the amendment of creative contribution, but As long as all being protected by Patent Law in right of the present utility model.

Claims (4)

1. a spiral electrothermal tube, including the shell arranged in the shape of a spiral, it is characterised in that: the cross section of described shell is trapezoidal Shape, the described shell area near side, middle part more than near outside area, described shell be internally provided with heating wire (2), the two ends of described heating wire (2) wear out described shell two ends, and told shell two ends are provided with insulation tube (3), described electricity Heated filament (2) is fed through described insulation tube (3), is provided with oxide isolation (4) between described heating wire (2) and described shell.

A kind of spiral electrothermal tube the most according to claim 1, it is characterised in that: described oxide isolation (4) is magnesia powder.

A kind of spiral electrothermal tube the most according to claim 1, it is characterised in that: the outer surface of described shell is provided with poly-four Fluorothene layer (5).

A kind of spiral electrothermal tube the most according to claim 1, it is characterised in that: described insulation tube (3) is earthenware.