CN2090038U

CN2090038U - Ribbed tube for radiator

Info

Publication number: CN2090038U
Application number: CN 90207874
Authority: CN
Inventors: 秦彪
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-06-05
Filing date: 1990-06-05
Publication date: 1991-12-04

Abstract

The utility model belongs to technical field of indoor heating. The utility model designs a ribbed tube for radiators. Sheet metal is winded on a tube after processing to form the sector ribbed tube with heat transfer enhancement. The ribbed tube has simple processing, high productive efficiency, high ribbed raw material utilization rate and low cost, and hot rolled steel strips with low quality can be utilized.

Description

Ribbed tube for radiator

The utility model relates to the indoor heating radiator technology.

Existing fin-tube radiator is a kind of heat abstractor of dull and stereotyped gilled tube structure, and following advantage is arranged: the metal thermal intensity height, and in light weight, compact conformation, the pressure-bearing height, installation and maintenance are convenient etc., thereby are widely used.But this radiator manufacturing needs high-test metal plate and steel pipe, the cost height, and manufacturing procedure is many, and the string sheet needs to shape blocks ofly, seals on the pipe more blocks ofly, and production efficiency is not high, processes each string sheet and all will waste some tailings.

The purpose of this utility model is, designs a kind of gilled tube that is used for radiator, and this gilled tube not only has very high reinforcement heat convection characteristics, also has manufacturing process simple, the production efficiency height, and raw material require advantages such as low.

Shown in the accompanying drawing 1 is fan-shaped gilled tube feature schematic diagram.Fan-shaped gilled tube has the enhanced heat exchange characteristics, and when the fan-shaped gilled tube of airflow passes, the flow boundary layer air on fin (1) heat exchange surface constantly is blocked, and has utilized the boundary layer at the The initial segment thinner thickness, and the stronger characteristics of conducting heat are come augmentation of heat transfer.This fan-shaped gilled tube processing and manufacturing is simple, sheet metal is converted into cross section and is " L " shape, the edge is cut into a rule on one side, as shown in Figure 2, be wrapped on the pipe again, as shown in Figure 3, so just form gilled tube, claim also that sometimes this is the zigzag spiral-finned tube with fan-shaped gilled tube feature.From this process for making as can be seen, production efficiency is more much higher than sheet string type, the raw material of fin (1) can adopt the sheet metal (such as hot rolling thin strip) of low-quality, there is not the tailing waste, the requirement of pipe (2) is not high yet, as long as outer surface is straight and even, does not have the requirement of circularity, in fact, pipe (2) also can be used elliptical tube.Accompanying drawing 4,5 shows another kind of machining manufacture, and sheet metal is converted into cross section and is " U " shape, and the edge, both sides is cut into a rule, is wrapped on the pipe (2) again, and this method doubles than foregoing method production efficiency.

Fin is wrapped on the pipe, has the gap between the flanging of fin root and the pipe.Thereby the thermal contact resistance problem appears, can make fin not play thermolysis under the serious situation, the method of sort this problem out has: the one, adopt welding (as: electric welding, soldering) or immersion plating, fin (1) and pipe (2) are combined as a whole, another is to add the filler (3) (can add some metal powders with the glue of energy bonded metal makes) with thermal conductive resin between fin root flanging and the pipe, as shown in Figure 6, this also can eliminate thermal contact resistance.

The fin of being made by fan-shaped gilled tube (4) must be arranged in the convective cover (5), as shown in Figure 7, to improve the decorative appearance and the security performance of radiator, also improved simultaneously the rate of heat dissipation of radiator widely, because convective cover (5) will play the swabbing action as chimney, increased the air velocity of the fin of flowing through (4).The temperature of the air in the suction intensity of convective cover and fin (4) the top convection channel (6) is directly proportional, thereby in convective cover, lay insulation layer (8), as shown in Figure 8, the air stream that is heated by fin keeps high temperature in convection channel, the suction intensity of convective cover is improved like this, and the radiating efficiency of radiator correspondingly is further enhanced.For making convective cover have function of heat insulation, convective cover also can directly adopt the nonmetallic materials of low heat conductivity to make.

Accompanying drawing 9 shows a design, and the convection current air outlet is opened in positive side, though reduced the suction intensity of convective cover like this, flying dust and article are difficult for falling in the fin, thereby wholesomeness is good, and external form is also very attractive in appearance.

Convective cover takes and does not take heat insulation measure, radiating effect to have only the difference of 20%-30%, thereby convective cover do not take heat insulation measure, directly adopts metal blank to make, and the radiating effect of radiator is highly significant also.

Description of drawings:

Accompanying drawing 1 is fan-shaped gilled tube feature schematic diagram, and (1) is fin, and (2) are pipe.

Accompanying drawing 2 twines the sheet schematic diagram for the fin metal.

Accompanying drawing 3 is the winding method schematic diagram of fan-shaped gilled tube, and (1) is fin, and (2) are pipe.

Accompanying drawing 4 twines the sheet schematic diagram for the fin metal.

Accompanying drawing 5 is the winding method schematic diagram of fan-shaped gilled tube, and (1) is fin, and (2) are pipe.

Accompanying drawing 6 is to add filler feature schematic diagram between fin and the pipe, and (1) is fin, and (2) are pipe, and (3) are filler.

Accompanying drawing 7 is the feature structure schematic diagram of radiator, and frame of broken lines (4) is a fin, and (5) are convective cover, and (6) are convection channel.

Accompanying drawing 8 is the feature structure schematic diagram of radiator, and frame of broken lines (4) is a fin, and (7) are the convective cover shell, and (8) are the insulation layer.

Accompanying drawing 9 is the feature structure schematic diagram of radiator,

Embodiment:

Tube outer diameter is got 20mm, and fin adopts the thick hot rolled strip of 0.5mm, and height is got 20mm, the wide 3mm that gets of little fin, fin is spaced apart 6mm, and the convective cover height is got 700mm, the insulation layer adopts the thick foamed plastics of 5mm, and the coefficient of heat transfer of radiator can reach more than 9.0W/t ℃, is 3 times of existing product.

Claims

1, a kind of gilled tube that is used for free convection type heating radiator includes fin and pipe, it is characterized in that: fin (1) be by sheet metal after processing, be wrapped on the pipe (2), form and to have the feature of fan-shaped gilled tube.

2, gilled tube according to claim 1 is characterized in that: described gilled tube is used to the radiator with convective cover.

3, according to claim 1,2 described gilled tubes is characterized in that: connect by welding or immersion plating between fin (1) and the pipe (2).

4, according to claim 1,2 described gilled tubes is characterized in that: be added with filler (3) between fin (1) and the pipe (2).

5, gilled tube according to claim 2 is characterized in that: convective cover adopts has metal material to make.

6, gilled tube according to claim 2, it is characterized in that: convective cover has been taked heat insulation measure, and promptly convective cover is equipped with insulation layer (8).

7, gilled tube according to claim 2, it is characterized in that: convective cover has been taked heat insulation measure, and promptly convective cover adopts has nonmetallic materials to make.