CN201093777Y - Double glass vacuum tube type solar heat collector - Google Patents

Abstract

The utility model provides a double layer glass vacuum metal tube type solar energy collector, which relates to a heat utilization technology of solar energy. A metal tube one and a metal tube two are arranged in parallel in an inner glass blind tube in each set of heat-collecting tubes, wherein, the metal tube two is arranged in the metal tube one; the lower end of the metal tube one is a blind end; the metal tube two is a through tube; a gap is arranged between the lower end of the metal tube two and the inner bottom of the metal tube one; metal fins are arranged outside the metal tube one; the opening end of the metal tube passes out of the inner glass blind tube to be supported on the opening end of the inner glass blind tube in an intermittent type, and the opening end of the metal tube two passes out of the opening end of the metal tube one. The elevation of temperature of medium in the metal pipe one of the utility model is fast and high. The effect hot water productive rate and the temperature of the heat transmission medium in a heat storage tank are favorable to be increased, and the filed of the appliance is expanded.

Description

Double-glazed vacuum tube solar collector

technical field

The utility model relates to solar heat utilization technology.

Background technique

Utilizing solar heating technology is an environmentally friendly advanced technology widely used in recent years. It is currently widely used in water heaters. Although the structures of various solar collectors are different, they all rely on vacuum heat collecting tubes to fully absorb sunlight. energy, and convert it into heat energy and transmit it to the medium (such as water). Vacuum collector tubes are commonly used heat-collecting elements in solar collectors. In the prior art, the heat collecting tube is composed of inner and outer glass blind tubes, the two tubes are evacuated, the outer wall of the inner tube is coated with heat-absorbing material, the inner tube is filled with water, and the water is absorbed by the outer wall of the inner tube to absorb solar radiation energy. Heating, the vacuum layer plays the role of heat preservation. In the process of use, this kind of vacuum heat collecting tube has the disadvantages of being easy to freeze damage, easy to scale, and low thermal efficiency because there is always water in the tube. In addition, because one end of the heat collecting tube is a blind end, and only one end is used as both the cold water inlet and the hot water outlet, the medium inside the heat collecting tube cannot smoothly exchange heat with the outside medium. The heat collecting tubes are then collected into a heat collector through a header. This kind of heat collector is not easy to output a higher temperature due to the large amount of medium water stored in it.

Utility model content

The purpose of the utility model is to design a double-layer glass vacuum tube solar heat collector which can greatly increase the output temperature of the heat transfer medium.

The utility model comprises at least three sets of heat collecting tubes, each set of heat collecting tubes includes two transparent inner and outer glass blind tubes which are mutually socketed in the same direction, and the inner and outer glass blind tubes are welded to each other at the opening ends, and are connected between the two A vacuum chamber is set between the glass blind pipes. Metal tube one and metal tube two are arranged in the inner glass blind tube of each set of heat collecting tubes, metal tube two is arranged in metal tube one, the lower end of metal tube one is a blind end, metal tube two is a straight-through tube, and the Interconnected gaps are set between the lower end and the inner bottom of the metal tube 1; metal fins are set outside the metal tube 1; the opening end of the metal tube 1 passes outside the inner glass blind tube and supports the opening of the inner glass blind tube in a gap manner end, the open end of the metal pipe two passes through the open end of the metal pipe one.

The utility model adopts the special structural design of the metal pipe 1 and the metal pipe 2. The lower temperature medium entering from the metal pipe 2 enters the metal pipe 1 from the blind end of the metal pipe 1. Metal fins are arranged outside the metal pipe 1. The medium is in the The heat energy in the metal tube 1 increases the temperature, which can speed up the flow of the high-temperature medium in the heat collecting tube to the outside of the heat collecting tube; because the amount of medium in the metal tube 1 is much less than that completely filled in the vacuum tube, the metal tube 1 The temperature of the medium in the tank rises faster and higher, which will help to increase the effective hot water production rate of the collector, increase the temperature of the heat transfer medium in the heat storage tank, and expand the application field of the collector.

The fins in the utility model can be radial, one end is connected to the metal pipe one, and the other end is far away from the metal pipe one.

The utility model has at least two fins, which can be arc-shaped, and are connected to the metal pipe 1 through connecting ribs.

In order to improve the light-to-heat conversion efficiency of the medium inside the metal tube, a solar heat absorbing film can be arranged on the outer surface of the metal fin. Sunlight penetrates the outer and inner glass blind tubes and directly shines on the metal tube 1 and the metal fins. The light energy is converted into heat energy through the solar heat absorbing film on it, and then the heat energy is transferred to the medium in the metal tube 1 respectively through heat conduction. .

In the utility model, the solar heat absorbing film can also be directly arranged on the outer surface of the inner glass blind pipe.

The utility model also arranges a light-gathering reflector between the inner and outer glass blind tubes. The concentrating reflector expands the lighting area, and the concentrated sunlight also increases the energy flow density, which further increases the temperature of the medium at the output end of the collector, and can expand the application space of solar energy in other fields, such as high-temperature heating, refrigeration, seawater Fade etc.

The open ends of the metal pipe two of each set of heat collecting pipes of the utility model respectively stretch out from the open end of the metal pipe one respectively, and then pass through the high-temperature water pipes of the collection, and are connected on the low-temperature water pipes of the collection.

In addition, the integrated low-temperature water pipes described in the utility model are arranged in the integrated high-temperature water pipes. It is easy to install and also conducive to heat preservation.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model.

FIG. 2 is a partially enlarged sectional view of FIG. 1 .

Fig. 3 is an A-A sectional view in Fig. 1 .

Fig. 4 is the second A-A sectional view in Fig. 1 .

Fig. 5 is a third A-A sectional view in Fig. 1 .

Fig. 6 is another partially enlarged sectional view of the present utility model.

Detailed ways

As shown in Figures 1 and 2, the utility model is composed of at least four sets of heat collecting tubes 1. The metal tubes 1 and 2 passing through each heat collecting tube 1 are respectively connected to the summary high-temperature water pipe 4. From the metal tubes of each heat collecting tube 1 The metal pipe two 3 that the pipe one 2 open ends pass through after passing through the through hole of the high temperature water pipe 4, and then connected to the low temperature water pipe 5 of the collection. Sealing should be done between the metal pipe 2 3 and the through hole of the collected high-temperature water pipe 4 passed through. A sealing rubber ring 8 is arranged between the open end of the inner glass blind pipe 6 and the metal pipe one 2 .

As shown in Figure 3, each set of heat collecting tubes 1 is composed of two transparent inner glass blind tubes 6, outer glass blind tubes 7, metal tube one 2 and metal tube two 3, which are mutually socketed in the same direction. The glass blind pipes 6 and 7 are welded to each other at the open ends, and a vacuum chamber is set between the two glass dead pipes. The first metal pipe 2 is arranged eccentrically in the inner glass blind pipe 6, and the second metal pipe 3 is arranged concentrically in the first metal pipe 2.

The lower end of the metal pipe one 2 is a blind end, the metal pipe two 3 is a straight-through pipe, and a gap is set between the lower end of the metal pipe two 3 and the inner bottom of the metal pipe one 2 . as shown in picture 2.

As shown in FIG. 3 , four metal fins 11 are arranged radially outside the metal pipe 2 , and the outer surfaces of each metal fin 11 are respectively provided with a solar heat absorbing film; the metal pipe 1 2 is coated with a solar heat absorbing film 10 . A W-shaped concentrating reflector 9 is arranged between the inner glass blind pipe 6 and the outer glass blind pipe 7 .

As shown in FIG. 4 , the inner glass dead tube 6 is concentrically arranged in the outer glass dead tube 7 . Three sets of connecting ribs 12 are used to connect three arc-shaped metal fins 11 provided with solar heat absorbing film outside the metal pipe 2 .

As shown in FIG. 5 , the inner glass dead tube 6 is eccentrically arranged in the outer glass dead tube 7 . A solar heat absorbing film 10 is arranged outside the inner glass blind pipe 6 . Three arc-shaped metal fins 11 are respectively connected to the outside of the metal pipe 2 through three sets of connecting ribs 12 .

As shown in FIG. 6 , the integrated low-temperature water pipe 5 can be arranged in the integrated high-temperature water pipe 4 .

Claims (9)

1. Double-layer glass vacuum tube solar collector, including at least three sets of heat collecting tubes, each set of heat collecting tubes includes two transparent inner and outer glass blind tubes that are connected to each other in the same direction, and the inner and outer glass blind tubes are in the The open ends are welded to each other, and a vacuum chamber is set between the two glass blind tubes. It is characterized in that: metal tube one and metal tube two are arranged in the inner glass blind tube of each set of heat collecting tubes, and metal tube two is arranged on metal tube one. Inside, the lower end of the first metal tube is a blind end, the second metal tube is a straight-through tube, and a gap connected to each other is set between the lower end of the second metal tube and the inner bottom of the first metal tube; metal fins are arranged outside the first metal tube; The opening end of the first metal tube passes through the outside of the inner glass blind tube and supports the opening end of the inner glass blind tube in a gap type, and the opening end of the metal tube two passes through the opening end of the metal tube one. 2. The double-layer glass vacuum tube solar heat collector according to claim 1, characterized in that the fins are radial, one end is connected to the metal tube one, and the other end is far away from the metal tube one. 3. The double-layer glass vacuum tube solar heat collector according to claim 1, characterized in that at least two fins are arc-shaped and connected to the first metal tube through connecting ribs. 4. According to claim 1, 2 or 3, the double-layer glass vacuum tube solar heat collector is characterized in that the outer surface of the metal fin is provided with a solar heat absorbing film. 5. The double-layer glass vacuum tube solar heat collector according to claim 1 or 2, characterized in that a solar heat absorbing film is arranged on the outer surface of the metal tube one. 6. According to claim 1, 2 or 3, the double-layer glass vacuum tube solar collector is characterized in that the outer surface of the inner glass blind tube is provided with a solar heat absorbing film. 7. The double-layer glass vacuum tube solar collector according to claim 1, 2 or 3, characterized in that a concentrating reflector is arranged between the inner and outer glass blind tubes. 8. According to the described double-layer glass vacuum tube solar heat collector of claim 1, it is characterized in that the open end of the metal tube two of each set of heat collecting tubes stretches out from the open end of the metal tube one respectively, and then passes through the high-temperature water pipe. After going out, connect to the summary low-temperature water pipe. 9. The double-layer glass vacuum tube solar collector according to claim 8, characterized in that the combined low-temperature water pipes are arranged in the combined high-temperature water pipes.

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