CN204830537U - Heat pipe vacuum tubular solar energy collection parts - Google Patents

Abstract

The utility model relates to a heat pipe vacuum tube type solar heat collecting part, which belongs to the technical field of solar light and heat utilization. The solar heat collection component contains double-layer vacuum glass tubes, metal heat pipes, elastic support sheets, elastic fixing elements and heat preservation cover; the metal heat pipes are fixed on the inner wall of the double-layer vacuum glass tubes through the elastic support sheets; In the vacuum glass interlayer at the top of the double-layer vacuum glass tube; hollow heat-absorbing fins are fixed on the metal heat pipe, and the outer surface of the hollow heat-absorbing fins is coated with selective absorption coating; one end of the metal heat pipe with hollow heat-absorbing fins is inserted Inside the double-layer vacuum glass tube, the other end protrudes out of the double-layer vacuum glass tube through the insulation blocking cover. The solar heat collecting components have the quasi-tracking performance of the sun's rays, high heat collection efficiency, fast heat collection speed, high heat collection rate in cloudy days, and there is no problem of antifreeze. At the same time, it also has the advantages of easy maintenance and installation of heat pipe vacuum type solar heat collecting parts, preventing heat dissipation from hot water at night, and preventing bursting when encountering cold water.

Description

A heat pipe vacuum tube type solar heat collecting component

technical field

The utility model relates to a heat pipe vacuum tube type solar heat collecting part, which belongs to the technical field of solar light and heat utilization.

Background technique

Among the varieties of solar water heaters in my country, vacuum tube solar water heaters have been widely concerned and applied in the field of solar heat utilization due to their good antifreeze and antifreeze performance and low heat loss coefficient, and have huge development prospects and space. Among them, the heat pipe vacuum tube solar collector is considered to be the fourth generation of solar heat collecting products after the sun-dried, flat-plate, and all-glass vacuum tube collectors. At present, the existing heat pipe vacuum tube solar collector is in the form of heat pipe-flat fins. Since the heat-absorbing surface of the flat plate does not have the ability to track the sun's rays, it is greatly affected by the incident angle of the sun, and the heat collection efficiency is low.

Utility model content

The purpose of this utility model is to provide a vacuum tube type solar heat collecting part of hollow fin heat pipe, aiming at improving the quasi-tracking performance and heat collecting efficiency of sunlight, and avoiding the problem of antifreezing at the same time.

The technical scheme of the utility model is as follows:

A vacuum tube heat pipe solar heat collection component, comprising a double-layer vacuum glass tube, a metal heat pipe, an elastic support piece, an elastic fixing element and a thermal insulation cover; the metal heat pipe is fixed on the inner wall of the double-layer vacuum glass tube through the elastic support piece The elastic fixing element is placed in the vacuum glass interlayer at the top of the double-layer vacuum glass tube; it is characterized in that: a hollow heat-absorbing fin is fixed on the metal heat pipe, and a selective absorption coating is coated on the outer surface of the hollow heat-absorbing fin; One end of the metal heat pipe with hollow heat-absorbing fins is inserted into the double-layer vacuum glass tube, and the other end extends out of the double-layer vacuum glass tube through the insulation blocking cover.

In the above technical solution, the hollow heat-absorbing fins are in the shape of a semi-cylindrical, umbrella or wave.

Preferably, the semi-cylindrical hollow heat-absorbing fins are arranged coaxially with the double-layer hollow glass tube.

The utility model has the following advantages and beneficial effects:

The utility model adopts hollow heat-absorbing fins on the metal heat pipe, and a selective absorption coating is coated on the outer surface of the hollow heat-absorbing fins, so that it has quasi-tracking performance for sunlight and effectively improves heat collection efficiency; The heat pipe has a small heat capacity, and it can output heat after a few minutes in the sun, and in cloudy and sunny weather, it can produce more hot water than other water heaters; since the water does not flow directly through the vacuum glass tube, it can be connected to the collector. Withstanding the pressure of tap water and circulating pumps, it has unique advantages in the application of large and medium-sized hot water systems. At the same time, it can avoid the problem of water channel blockage caused by scaling of vacuum glass tubes; At night, it will not dissipate heat downward along the heat pipe to the surrounding environment. It has good heat preservation, and it is not easy to freeze and crack even in severe cold conditions; Immediately inject cold water into the water heater, and the vacuum tube will not burst; the vacuum tube in the collector and the collector are "dry connections", there is no hot water leakage problem, and the installation is easy. Even if there is a problem with one heat pipe, it will be repaired It will not affect the normal use of the whole system, easy maintenance and reliable operation.

Description of drawings

Fig. 1 is a schematic diagram of the structural principle of a heat pipe vacuum tube type solar heat collector of the present invention.

Fig. 2 is the front view of the utility model.

FIG. 3 is a cross-sectional view along line A-A of FIG. 2 .

The components in the figure represent: 1-double-layer vacuum glass tube; 2-metal heat pipe; 3-hollow heat-absorbing fin; 4-elastic support sheet; 5-selective absorption coating; Fixed elements.

Detailed ways

Below in conjunction with accompanying drawing, working principle of the present utility model, concrete structure are further described.

Fig. 1 is a structural schematic diagram of a heat pipe vacuum tube type solar heat collecting part provided by the utility model. Element 7; the metal heat pipe 2 is fixed on the inner wall of the double-layer vacuum glass tube 1 through the elastic support sheet 4; the elastic fixing element 7 is placed in the vacuum glass interlayer at the top of the double-layer vacuum glass tube 1; fixed on the metal heat pipe 2 There are hollow heat-absorbing fins 3, and the hollow heat-absorbing fins can be in the shape of a semi-cylindrical, umbrella or wave; for the semi-cylindrical hollow heat-absorbing fins, they should be arranged coaxially with the double-layer hollow glass tube 1.

The outer surface of the hollow heat-absorbing fin 3 is coated with a selective absorbing coating 5; one end of the metal heat pipe with the hollow heat-absorbing fin is inserted into the double-layer vacuum glass tube 1, and the other end passes through the insulating cover 6 to extend out of the double-layer vacuum glass tube. The hollow heat-absorbing fin 3 is made of a metal material with good thermal conductivity, and is welded together with the metal heat pipe 2; the hollow heat-absorbing fin 3 is fixed on the double-layer vacuum glass tube 1 with an elastic fixing element 7 by the elastic support piece 4 on the inner wall.

Principle and working process of the present utility model are as follows:

During actual operation, the heat collecting component is kept facing south and placed inclined or perpendicular to the horizontal plane. During the day, sunlight shines through the double-layer vacuum glass tube to the selective absorption coating on the surface of the hollow heat-absorbing fin, and the selective absorption coating The layer transfers the absorbed heat to the hollow heat-absorbing fin 3, and then transfers the heat to the liquid working medium inside the evaporation end of the metal heat pipe. The liquid working medium becomes gaseous working medium after being heated and evaporated and flows upward along the metal heat pipe. The condensing end of the metal heat pipe realizes condensation and release heat, thereby transferring heat to the heat transfer medium (such as air, water, etc.) The substance flows back down to the evaporator along the metal heat pipe, and then continues to absorb the heat from the selective absorption coating and becomes steam to flow upwards. This reciprocates to form a cycle of heat absorption and heat release, thereby continuously transferring heat from sunlight to the heat transfer device. Thermal media to realize efficient light-to-heat conversion and utilization of solar energy.

Claims (3)

1. A heat pipe vacuum tube type solar heat collecting part, comprising a double-layer vacuum glass tube (1), a metal heat pipe (2), an elastic support sheet (4), an elastic fixing element (7) and an insulation blocking cover (6); The metal heat pipe (2) is fixed on the inner wall of the double-layer vacuum glass tube (1) through the elastic support piece (4); the elastic fixing element (7) is placed in the vacuum glass interlayer at the top of the double-layer vacuum glass tube (1); It is characterized in that a hollow heat-absorbing fin (3) is fixed on the metal heat pipe (2), and the outer surface of the hollow heat-absorbing fin (3) is coated with a selective absorption coating (5); the metal heat pipe (2) has a One end of the hollow heat-absorbing fin is inserted into the double-layer vacuum glass tube (1), and the other end extends out of the double-layer vacuum glass tube through the heat insulating cover (6). 2. A heat pipe vacuum tube type solar heat collecting component according to claim 1, characterized in that: the hollow heat absorbing fins (3) are in the shape of a semi-cylindrical, umbrella or wave. 3. A heat-pipe vacuum tube type solar heat collecting component according to claim 2, characterized in that: the semi-cylindrical hollow heat-absorbing fins (3) are coaxially arranged with the double-layer hollow glass tube (1).