CN211702433U

CN211702433U - Electric heating device

Info

Publication number: CN211702433U
Application number: CN202020458328.9U
Authority: CN
Inventors: 强妍
Original assignee: Xiaoai Shanghai Energy Saving Technology Co ltd
Current assignee: Xiaoai Shanghai Energy Saving Technology Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-10-16
Anticipated expiration: 2030-04-01

Abstract

The utility model discloses an electric heating device, include: the electric heating pipe assembly is used for converting electric energy into heat energy; an insulated pipe, the electric heating pipe assembly being located in an inner space of the insulated pipe; a fixing part for fixing the electric heating pipe assembly and the heat insulation pipe.

Description

Electric heating device

Technical Field

The utility model relates to a heating device especially relates to an electric heating device.

Background

An electric heating device is a device which consumes electric energy and converts the electric energy into heat energy to heat materials to be heated, and is widely applied to various industrial production equipment, and the typical application mode is that the electric heating device is used in a hopper of an injection molding machine for drying raw materials or other drying equipment. Most of the existing heaters achieve the heating purpose by heating tungsten wires and radiating heat outwards. The tungsten heater has low heat effect, and usually consumes a large amount of electric energy to achieve the required heating effect. In order to solve the problem of low efficiency conversion of the tungsten heater, an electric heating tube is also provided in the prior art. The electric heating tube is formed by filling electric heating wires into seamless metal tubes (carbon steel tubes, titanium tubes, stainless steel tubes and copper tubes), filling magnesium oxide powder with good heat conductivity and insulativity into gaps, then shrinking the tubes, and then processing the tubes into various shapes required by users. It has simple structure, high heat efficiency, high mechanical strength and excellent adaptability to harsh environment. It can be used for heating various liquids and acid, alkali and salt, and is also suitable for heating and melting metals with low melting point (lead, zinc, tin and babbitt).

As shown in fig. 1, the electric heating tube includes a metal tube 1, a heating wire 2 positioned inside the hollow metal tube, and magnesium oxide powder 3 filled between the heating wire 2 and the metal tube 1, and is connected to a power source through a connector 4. The electric heating tube of fig. 1 is generally used in a dryer, but has disadvantages of slow temperature rise, low heat energy conversion rate, and safety hazard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric heater unit to solve the heat energy conversion rate that exists among the prior art low, heat up slowly, have one or more shortcoming of potential safety hazard.

In order to realize the above utility model purpose, the utility model discloses an electric heating device, include: the electric heating pipe assembly is used for converting electric energy into heat energy; an insulated pipe, the electric heating pipe assembly being located in an inner space of the insulated pipe; a fixing part for fixing the electric heating pipe assembly and the heat insulation pipe.

Furthermore, the electric heating tube assembly comprises a first electric heating tube and a second electric heating tube.

Furthermore, the electric heating pipe assembly further comprises a third electric heating pipe, the first and second electric heating pipes have the same length, and the length of the third electric heating pipe is smaller than that of the first and second electric heating pipes.

Further, the electric heating tube has a U-shape.

Further, the surface of the electric heating tube includes a spiral-shaped protrusion.

Further, the height of the protrusions is 2-5 mm.

Further, the insulated pipe includes an inner pipe and an outer pipe, and the electric heating pipe assembly is located in an inner space of the inner pipe.

Furthermore, a vacuum or filled heat insulation cotton is arranged between the inner pipe and the outer pipe.

Further, the distance between the inner tube and the outer tube is 2-20 mm.

Still further, the insulating tube is selected from one or more of the following materials: stainless steel, quartz, ceramic, magnesium oxide, iron, copper, aluminum.

Compared with the prior art, the utility model provides a technical scheme can promote electric heating pipe's programming rate effectively, can rapid heating up to 148 degrees centigrade in 5 minutes. On the other hand, the utility model provides a technical scheme takes directional release with the heat energy of electric heating pipe subassembly release, can realize rapid heating up to specific position. Furthermore, the potential safety hazard of scalding caused by direct contact with a human body due to overhigh surface temperature of the heating pipe is avoided.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

fig. 1 is a schematic structural view of an electric heating tube in the prior art;

fig. 2 is a schematic structural view of an electric heating apparatus according to a preferred embodiment of the present invention;

fig. 3 is a schematic structural view of an electric heating apparatus according to another preferred embodiment of the present invention;

fig. 4 is a schematic structural view of the present invention employing 6 electric heating tubes.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment. The terms "outside" and "outside" as used herein generally refer to a location away from the central axis, and "inside" and "inboard" generally refer to a location near the central axis.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.

An object of the utility model is to provide an electric heater unit solves the shortcoming of the electric heater unit that exists among the prior art. The electric heating device comprises an electric heating pipe assembly, a fixing part positioned at one end of the electric heating pipe assembly, and a heat insulation pipe positioned outside the electric heating assembly. The heat energy released by the electric heating pipe assembly can be directionally released through the heat insulation pipe, and rapid temperature rise can be realized at a specific position. The heat insulation pipe also avoids the potential safety hazard of scalding caused by direct contact with a human body due to overhigh surface temperature of the heating pipe. The following describes in detail implementations of the present invention with reference to the respective drawings.

As shown in fig. 2, fig. 2 is an embodiment of the electric heating apparatus provided by the present invention. The electric heating device comprises an electric heating pipe assembly 10 and a heat insulation pipe 30, wherein the heat insulation pipe 30 can be vacuumized and filled with heat insulation cotton, and the electric heating pipe assembly 10 is positioned inside the heat insulation pipe 30. In the present embodiment, the insulating tube 30 is cylindrical, but those skilled in the art can design it into other shapes according to the actual use requirement. The electric-heating-tube assembly 10 and the insulation tube 30 are connected by the fixing member 20, and the power supply connection member 40 is used to supply power to the electric-heating-tube assembly 10. The heat insulation pipe 30 is made of metal or nonmetal elements, such as quartz pipe, ceramic pipe, magnesium oxide pipe, stainless steel pipe, iron pipe, copper pipe, and aluminum pipe. In a preferred embodiment, the insulated pipe 30 is a double pipe, i.e., an inner and outer pipe. The double-layer pipes can be vacuumized and filled with heat insulation cotton. In a preferred embodiment the linear distance between the double tubes is 2-20mm (millimetres), more preferably 5-10 mm. In a preferred embodiment, the material of the heat insulation cotton can be selected from glass fiber cotton, ceramic cotton, rock wool, aerogel and other heat insulation materials. In a preferred embodiment, both the inner and outer tubes are made of stainless steel tubing.

In the present embodiment, the electric heating tube assembly 10 is composed of a U-shaped heating tube, which can be replaced by a spiral-shaped heating tube or other shapes by those skilled in the art.

As shown in fig. 3, fig. 3 is another embodiment of the electric heating apparatus provided by the present invention. The electric heating device also comprises an electric heating device comprising an electric heating tube assembly 10 and an insulated tube 30. In this embodiment, the electrical heating assembly 10 is comprised of three U-shaped fin heating tubes. The surface distribution of

fin heating pipe

11, 12, 13 has spiral arch, can greatly increase the heat radiating area on heating pipe surface through this spiral arch, reaches the rapid utility model purpose that heaies up. After repeated tests by people, the utility model discloses the height of fin is 2-5mm, can reach best radiating effect when the distance between two adjacent fins on same axis is 10-16mm, and the radiating efficiency can promote more than 50% than no fin heating pipe.

In the present embodiment, the heating pipes 13 and the heating pipes 12 have the same length and are distributed in parallel with each other, and the third heating pipe 11 has a smaller length than the

heating pipes

12 and 13 and is distributed perpendicularly to the

heating pipes

12 and 13. In addition to the 3 heating pipes in this embodiment, 6, 9, 12, 15, 18 heating pipes may be provided. Taking 6 heating pipes as an example, 12 equal divisions, namely 30 degrees uniform distribution, can be carried out on the circumference. When 6 heating pipes set up inside this thermal-insulated 30, can set up to two sets of heating pipe subassemblies, every group contains 3 electric heating pipe. As shown in fig. 4, 11a and 11b are two ends of the same electric heating tube, and the rest are analogized in turn. The three

electric heating pipes

11, 12 and 13 form a first group of heating pipe components, 14, 15 and 16 form a second group of heating pipe components, and the connecting ends of the first group of heating pipe components and the second group of heating pipe components and the fixing part are sequentially and alternately arranged. The first group of heat pipe assemblies has a length greater than the second group of heat pipe assemblies. The

heating pipes

13 and 12 are the same in length and are distributed in parallel, the third heating pipe 11 is shorter than the

heating pipes

12 and 13, and the distribution positions are perpendicular to the

heating pipes

12 and 13. The heating pipes 15 and 16 have the same length and are distributed in parallel, the heating pipe 14 has a length smaller than that of the heating pipes 15 and 16, and the distribution positions are perpendicular to the heating pipes 15 and 16. Through above-mentioned design, 6 heating pipes are contactless each other to can furthest promote heating efficiency.

In this embodiment, the fixing member 20 is a flange, which includes a plurality of circular holes for mounting the electric heating assembly 10.

It will be clear to a person skilled in the art that the values referred to in the present invention are not absolute values in the mathematical sense, but rather values taking into account errors in the state of the art.

Compared with the prior art, the utility model provides a technical scheme can promote electric heating pipe's programming rate effectively, can be in 5 minutes rapid heating to 148 degrees centigrade, has avoided shortening by a wide margin because of the too high working life who leads to of resistance wire temperature. On the other hand, the utility model provides a technical scheme takes directional release with the heat energy of electric heating pipe subassembly release, can realize rapid heating up to specific position. Furthermore, the potential safety hazard of scalding caused by direct contact with a human body due to overhigh surface temperature of the heating pipe is avoided.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. An electric heating device, comprising: the electric heating pipe assembly is used for converting electric energy into heat energy; an insulated tube, the electric heating tube assembly being located in an interior space of the insulated tube; a fixing part for fixing the electric heating pipe assembly and the heat insulating pipe.

2. The electric heating apparatus of claim 1, wherein the electric heating tube assembly comprises first and second electric heating tubes.

3. The electric heating apparatus of claim 2, wherein the electric heating tube assembly further comprises a third electric heating tube, the first and second electric heating tubes are the same length, and the third electric heating tube is shorter than the first and second electric heating tubes.

4. An electric heating apparatus as claimed in claim 2 or 3, wherein the electric heating tube is U-shaped.

5. An electric heating apparatus as claimed in any one of claims 2 to 3, wherein the surface of the electric heating tube comprises a spiral-shaped protrusion.

6. An electrical heating apparatus as in claim 5 wherein the height of the protrusions is 2-5 mm.

7. The electric heating apparatus of claim 1, wherein the electric heating tube assembly comprises a first group of electric heating tubes and a second group of electric heating tubes, the first group of electric heating tubes and the second group of electric heating tubes are three U-shaped electric heating tubes, and the first group of electric heating tubes and the second group of electric heating tubes are alternately arranged with the connecting ends of the fixing part.

8. The electric heating apparatus of claim 1, wherein the insulated pipe comprises an inner pipe and an outer pipe, the electric heating pipe assembly is located in an inner space of the inner pipe, and a vacuum or filled insulating cotton is disposed between the inner pipe and the outer pipe.

9. An electrical heating device as in claim 8 wherein the distance between the inner and outer tubes is 2-20 mm.

10. An electric heating device as claimed in claim 1 or 7, characterized in that the heat-insulating tube is made of stainless steel.