CN212081196U

CN212081196U - Novel pipe-in-pipe steam generator

Info

Publication number: CN212081196U
Application number: CN202020105648.6U
Authority: CN
Inventors: 吴智彪; 陆海波
Original assignee: Shenzhen Baolian Zhihui Technology Co ltd
Current assignee: Shenzhen Baolian Zhihui Technology Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-12-04
Anticipated expiration: 2030-01-17

Abstract

The invention provides a novel pipe-in-pipe steam generator which comprises an inner sleeve, a heat transfer insulating medium and an outer sleeve, wherein the heat transfer insulating medium is filled between the inner sleeve and the outer sleeve, a resistance heating wire is embedded in or sleeved outside the heat transfer insulating medium, and the heat transfer insulating medium is a hollow pipe which is prepared in advance or is compacted into a hollow pipe after being filled. The invention has the advantages of simple structure, short exchange path, small heat energy loss, short time, light weight, small volume and the like, has low realization process difficulty and lower cost, and can be widely used in the technical fields of hanging ironing machines, irons, steam cleaners, steam disinfection and the like.

Description

Novel pipe-in-pipe steam generator

Technical Field

The invention relates to a steam generator, in particular to a novel pipe-in-pipe steam generator.

Background

At present, all small household appliances in the world, steam evaporators are composed of electric heating tubes, steam pipelines and steam passages, wherein the steam pipelines are arranged in aluminum castings, the aluminum castings need molds, one mold is few and hundreds of thousands, the heat efficiency is low, heat energy is exchanged from resistance wires to stainless steel tubes, then is exchanged to aluminum, and then is exchanged to stainless steel tubes, and then is used for water and steam, the middle exchange path is long, the heat energy loss is large, the time is long, the weight is heavy, the size is large, the small and exquisite household appliances or electric appliances are gradually biased, a great blocking effect is formed, and the miniaturization development of the household appliances or the electric appliances is not facilitated.

The core heating parts of the existing steam products all use a heating core made by die-casting a heating tube in aluminum alloy, for example, a built-in steam generator of a garment steamer disclosed in chinese patent ZL200920160371.0, the heating tube 201 is arranged in the heating body 200, so that heat radiation generated by the heating wire must penetrate through an insulating heat-conducting filler, a metal outer tube and a die-casting aluminum material and can be finally transmitted to liquid water in a hot pot, the heat radiation loss occupies about 40% in the period, the heating efficiency is only less than 60%, the defect of the product is that the heating time is too long (more than 2 minutes), the thermal efficiency is low, and the service life of the hot pot of the product is short (less than two years).

The invention provides a novel pipe-in-pipe steam generator which has the advantages of short exchange path, small heat energy loss, short time, light weight, small volume and the like, and has great promotion and reuse effect on the miniaturization of household appliances or electric appliances.

Disclosure of Invention

The invention provides a novel pipe-in-pipe steam generator which comprises an inner sleeve, a heat transfer insulating medium and an outer sleeve, wherein the heat transfer insulating medium is filled between the inner sleeve and the outer sleeve, a resistance heating wire is embedded in or sleeved outside the heat transfer insulating medium, and the heat transfer insulating medium is a hollow pipe which is prepared in advance or is compacted into a hollow pipe after being filled.

The prefabricated hollow tube is a hollow magnesium rod, a heating wire is embedded in or sleeved outside the hollow magnesium rod, the inner sleeve is sleeved inside the hollow magnesium rod, the outer sleeve is externally arranged outside the hollow magnesium rod, and heat transfer insulating media are further filled between the hollow magnesium rods and the outer sleeve.

The steam pipe of the invention does not need to cast aluminum, the heating wire directly heats the steam pipe through heat transfer medium, compared with the prior art, the invention has the advantages of short exchange path, small heat energy loss, short time, light weight, small volume and the like, and has great promotion and reuse for the miniaturization of household appliances or electric appliances. How to compact the magnesium powder is always a technical problem in the field, and the invention has the advantages that the magnesium powder is firm and the heat conduction effect is good through the magnesium tube which is prefabricated in advance and the heating wire which is embedded in the magnesium tube.

Preferably, the heating wire is a resistance heating wire.

Preferably, the inner casing is a stainless steel tube.

Preferably, the outer sleeve is a stainless steel tube.

Preferably, the heat transfer insulating medium is a material having good thermal conductivity, good insulation, and a small expansion coefficient.

Preferably, the heat transfer insulating medium is magnesium oxide powder.

Furthermore, the lower end of the inner sleeve is provided with an inlet, and the upper end of the inner sleeve is provided with an outlet.

Further, the steam discharged from the outlet is normal-pressure high-temperature steam.

Further, the temperature of the normal-pressure high-temperature steam is higher than 120 ℃.

The invention has the advantages that the cast magnesium powder and the pipe contraction work of the electric heating pipe are not changed, the pressure of the pipe contracted in the middle of the pipe is small, the safety is higher, the pressure can be normal pressure and high pressure, and the electric heating pipe can be made into a miniature small household appliance, such as a coffee machine small boiler. The heat energy that the heating resistance wire sent is direct through cavity magnesium stick, to the resistance wire, almost directly to interior cover way, and the temperature that the resistance wire produced can reach more than 800 degrees, and middle exchange layer is few, and the route is short, and the difference in temperature is big, and the thermal efficiency is high, and the time is short can reach, goes out steam in the twinkling of an eye, the purpose of heating steam, and this part is small, light in weight, and the structure is extremely stable, has reduced the material and the process more than 3/4 than traditional cast aluminium evaporimeter, very big reduction manufacturing cost.

Drawings

FIG. 1 is a schematic view of a novel hollow magnesium rod structure of a tube-in-tube steam generator;

FIG. 2 is a schematic view of the structure of an inner tube and hollow magnesium rod of a novel tube-in-tube steam generator;

FIG. 3 is a schematic diagram of a novel tube-in-tube steam generator;

FIG. 4 is a side cross-sectional view of a novel tube-in-tube steam generator configuration;

FIG. 5 is a cross-sectional view of a novel tube-in-tube steam generator configuration.

Detailed Description

The invention is further described below with reference to the figures and examples.

Example 1

As shown in fig. 4-5, a novel tube-in-tube steam generator includes an inner tube 1, a heat transfer insulating medium 4 and an outer tube 3, the heat transfer insulating medium 4 is filled between the inner tube 1 and the outer tube 3, and a resistance heating wire is embedded in the heat transfer insulating medium 4, so the heat transfer medium 4 is a pre-made hollow tube or is compacted into a hollow tube after being filled.

Wherein, the inner sleeve and the outer sleeve are stainless steel pipes. Furthermore, the lower end of the inner sleeve is provided with an inlet, and the upper end of the inner sleeve is provided with an outlet.

Example 2

As shown in fig. 1-3, a novel tube-in-tube steam generator includes an inner tube 1, a heat transfer insulating medium 4 and an outer tube 3, wherein the heat transfer insulating medium 4 is a prefabricated hollow magnesium rod 2, the hollow magnesium rod 2 is also externally sleeved with a resistance heating wire, the inner tube 1 is internally sleeved inside the hollow magnesium rod 2, the outer tube 3 is externally arranged outside the hollow magnesium rod 2, and the outer tube 3 is externally arranged between the hollow magnesium rods 2 and is further filled with magnesium oxide powder 4.

Water flows into the outlet from the inlet at the lower end of the inner sleeve, the water absorbs heat generated by the resistance heating wire in the steam pipeline and is gradually vaporized to generate steam, the steam continuously absorbs heat in the process of flowing along the inner wall of the inner sleeve to continuously raise the temperature of the steam, so that liquid in the pipeline is rapidly vaporized, and the temperature is about 240 ℃ when the steam is discharged through the outlet (the performance of the steam product requires that the temperature at the steam outlet of the hot pot is not lower than 200 ℃).

The invention provides a novel pipe-in-pipe steam generator, which aims to ensure that a pipe-in-pipe hollow magnesium rod is heated uniformly, so that water or a liquid-vapor mixture can be heated fully in a steam pipeline to meet the temperature requirement of a steam product on the steam performance.

The utility model discloses a simple structure, it is short to have exchange route, and the heat energy loss is little, and the time is short, light in weight, advantages such as small realize that the technology degree of difficulty is low, and the cost is lower, but wide application in technical field such as coffee machine small boiler, garment steamer, flatiron, steam cleaner, steam disinfection.

While the invention has been described in connection with specific preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The novel pipe-in-pipe steam generator comprises an inner sleeve, a heat transfer insulating medium and an outer sleeve, and is characterized in that the heat transfer insulating medium is filled between the inner sleeve and the outer sleeve, a resistance heating wire is embedded in or sleeved outside the heat transfer insulating medium, and the heat transfer insulating medium is a hollow pipe which is prepared in advance or is compacted into a hollow pipe after being filled.

2. The new tube in tube steam generator of claim 1 wherein the prefabricated hollow tube shape is a hollow magnesium rod.

3. The new tube in tube steam generator of claim 1, wherein the heater is a resistance heater.

4. The novel tube in tube steam generator of claim 2 or 3, wherein the inner tube is a stainless steel tube.

5. The new tube in tube steam generator of claim 4, wherein the outer sleeve is a stainless steel tube.

6. The new tube in tube steam generator of claim 1 wherein the heat transfer insulating medium is magnesium oxide powder.

7. The new tube in tube steam generator of claim 5 wherein the inner tube is provided with a water inlet at a lower end and an outlet at an upper end.

8. The new tube in tube steam generator of claim 7 wherein the outlet steam is atmospheric high temperature steam.

9. The new tube in tube steam generator of claim 8, wherein the atmospheric hot steam temperature is greater than 120 degrees celsius.