CN2366791Y

CN2366791Y - Heat pipe specially for solar energy water heater

Info

Publication number: CN2366791Y
Application number: CN99208074U
Authority: CN
Inventors: 胡拾命; 齐英栋
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-21
Filing date: 1999-04-21
Publication date: 2000-03-01
Anticipated expiration: 2009-04-21

Abstract

The utility model relates to a heat pipe specially for a solar energy water heater, which is designed for further improving the heat efficiency of a solar energy water heater with a heat pipe. Heat absorption plates are arranged on both sides of the heat pipe. The cross sections of the heat absorption plates are wing-shaped. The number of tortuous edges of the heat absorption plates ranges from two to four. Compared with a heat absorption plate with the same width, the areas of the heat absorption plates of the special purpose heat pipe are enlarged. The heat absorption plates can sufficiently absorb heat quantity in a heat collecting plate of a water heater. A part of tortuous edges can vertically accept sunshine. Then, heat absorptivity is improved. The heat absorption plates and the heat pipe of the utility model are integrally shaped by aluminum products. Bonding faces do not exist. Heat resistance is not generated. Heat-transfer efficiency is the best.

Description

The special-purpose heat pipe of solar water heater

The utility model relates to a kind of solar thermal collector, the special-purpose heat pipe in specifically a kind of solar water heater.

Heat pipe solar energy water heater is simple in structure with it, the thermal efficiency is high and obtain large-scale popularization and application.Critical component-heat pipe wherein then is the focus that water heater production and research institute pay close attention to.The heat pipe that the water heater earliest period is used, the sealing copper pipe that working medium is housed exactly.Along with constantly discovering, the heat pipe of straight pipe type does not reach the highest to the utilization ratio of solar energy, has designed the heat pipe of band wing thus, and promptly be provided with heat absorption in the both sides of heat pipe dull and stereotyped.Utilize heat absorption dull and stereotyped, increase the endotherm area at sunshine.This has had raising by a relatively large margin than the thermal efficiency of straight tube shape heat pipe.This band wing heat pipe has two kinds of forms at present, and a kind of is that the two layers of thin copper coin is repeatedly pressed, and look is lived the copper heat pipe, and in the heat pipe both sides flat stretching out; Another kind is that the middle part of individual layer copper coin has the bar shaped half slot, and the copper heat pipe places groove, and side makes to be integral along welding.Improve though the heat pipe heat absorption efficiency of these two kinds of forms has had by a relatively large margin, also have some defectives: one is to use copper pipe, copper coin, and cost is higher; The 2nd, manufacturing process is many, complex process; The 3rd, the equipment input is many, and cost is many man-hour, and production efficiency is low, the production cost height; The 4th, the heat absorption flat board can not be finished driving fit with heat pipe and contact, and the thermal resistance in the heat transfer process is increased, and has influenced heat transfer efficiency.

The purpose of this utility model just provides the special-purpose heat pipe of solar water heater that a kind of cost is low, the thermal efficiency is high, to reduce production costs, improves the overall thermal efficient of solar water heater.

The utility model is achieved in that the special-purpose heat pipe of water heater still belongs to the scope of band wing heat pipe, promptly in the both sides of heat pipe absorber plate is arranged, and the cross section of absorber plate is wing shape, and its tortuous limit has 2-4.

The utility model also can be realized like this: absorber plate and heat pipe are the aluminium global formation.

Advantage of the present utility model is, makes flat absorber plate into wing shape, thereby in identical absorber plate width range, has increased the absorber plate area, can fully absorb the heat that water heater thermal-arrest plate casing internal cause is produced sunshine thus.In addition, no matter the wing shape absorber plate also makes in the morning or afternoon always have the tortuous limit of part absorber plate vertically to accept sunshine, has improved the photothermal absorptivity of absorber plate.The aluminium global formation of band wing heat pipe greatly reduces than the copper material cost, and integrated structure, makes not have faying face between heat pipe and absorber plate, does not produce thermal resistance, so heat transfer efficiency is best.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a cross section of the present utility model cutaway view.

Fig. 2 is an outward appearance vertical view of the present utility model.

As shown in drawings, the special-purpose heat pipe of this solar water heater includes the wing shape absorber plate 2 of heat pipe 1 and both sides, and its cross section resembles a hawk of spreading its wings to fly.Can there be 2-4 on the tortuous limit of absorber plate 2, is better implementation with 3 shown in Figure 1.Tortuous limit is less than two, Cheng Qiwei wing not then, and more than four, then each tortuous limit inevitable narrow (because the width of absorber plate has certain limit, can not be wide) influences endothermic effect.The results showed that the tortuous limit of absorber plate 2 ratio of height h and the width B of heat pipe 1 and both sides absorber plate 2 summations up and down is: h: B=1: (15～30) define the tortuosity on absorber plate 2 tortuous limits thus.The better scope of h: B is 1: (18～20), within this scope, the unit are collecting efficiency that water heater thermal-arrest plate of the present utility model is housed reaches the optimum range level.

In addition, the absorber plate 2 in the utility model is the form of aluminium global formation with heat pipe 1, promptly earlier with the aluminium fusing, then by mould, once squeezes the type that rolls into.Its production process is continuous, and production process is simple, uses lower cost for material, can reduce the overall cost of solar water heater.The section bar of moulding by structural segmented intercepting shown in Figure 2, and is removed the both sides wing of one section on heat pipe 1 head, with as the usefulness of joining with the water heater storage tank.The bottom of heat pipe 1 is a sealing end 3, in order to after heat pipe is exhausted priming by vacuum working medium, imposes sealing wax.

Heat pipe in the utility model and absorber plate monolithic molding, and be the wing structure, heat transfer efficiency is good, the heat absorption efficiency height, and rigidity is stronger, is difficult for flexural deformation.

Claims

1, the special-purpose heat pipe of a kind of solar water heater has absorber plate (2) in the both sides of heat pipe (1), it is characterized in that the cross section of absorber plate (2) is wing shape, and its tortuous limit has 2-4.

2, special-purpose heat pipe according to claim 1 is characterized in that absorber plate (2) and heat pipe (1) are the aluminium global formation.

3, special-purpose heat pipe according to claim 1, the flanging that it is characterized in that absorber plate (2) ratio of the width B of height h and heat pipe (1) and both sides absorber plate (2) summation up and down are: h: B=1: (15～30).