CN201093776Y - Double glass vacuum metal tube type solar heat collector outputting high temperature - Google Patents

Abstract

The utility model provides a double layer glass vacuum metal tube type solar energy collector of which the output temperature is high, and relates to a heat utilization technology of solar energy. The outer surface of an inner glass blind tube is provided with a solar energy heat-absorbing film; blind ends of the metal tube one and the metal tube two in the inner glass blind tube are mutually communicated; at least two metal fins are arranged outside the metal tube one, and the metal pipe two is arranged between gaps of the fins of the metal pipe one; end parts of metal tubes one and two pass 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 end parts are positioned at the opening ends of the inner glass blind tube. The elevation of temperature of the medium in the metal pipe one and the metal pipe two is fast and high, and the utility model can greatly improve the output temperature of the heat transmission medium. 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-layer glass vacuum metal tube solar collector with high output temperature

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 easy frost damage, easy scaling, low thermal efficiency and the like 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 metal 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 cavity is set between the glass blind tubes, and the feature is that: a solar heat absorbing film is arranged on the outer surface of the inner glass blind tubes; metal tube one and metal tube two are arranged in parallel in the inner glass dead tubes, and the metal tubes one and two are arranged in the inner glass blind tubes. The blind ends of the blind tubes are connected to each other, at least two metal fins are arranged outside the metal tube one, and the metal tube two is set between the fin gaps of the metal tube one; the metal tubes one and two are located at the end of the opening end of the inner glass blind tube Pass through the inner glass dead tube and gap support the open end of the inner glass dead tube.

The utility model is provided with metal fins on the first metal tube and no metal fins on the second metal tube, so that the medium in the first metal tube and the second metal tube forms a temperature difference; due to the amount of medium in the first metal tube and the second metal tube Compared with the amount of medium fully filled in the vacuum tube, it is much less, so the temperature of the medium in the metal tube 1 and metal tube 2 rises faster and higher, which will help improve the effective hot water production rate of the collector and improve heat storage The temperature of the heat transfer medium in the box is conducive to expanding the application field of the heat collector.

The metal fins described in the utility model are radial, and one end of each metal fin is respectively fixedly connected to the outside of the metal pipe.

There are two metal fins in the utility model, which are arc-shaped. One end of the two metal fins is respectively fixedly connected to the outside of the metal pipe, and the other ends are respectively bent towards each other.

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 at the output end of the heat collecting tube, and expands the application space for solar energy in other fields, such as high-temperature heating, refrigeration, seawater desalination, etc.

The first and second metal tubes of two adjacent sets of heat collecting tubes can also be connected in series in sequence, and the two ports formed by the series connection are respectively connected to two collecting tubes.

Description of drawings

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

Fig. 2 is another structural schematic diagram of the utility model.

Fig. 3 is a schematic diagram of the connection structure of the inner and outer glass blind pipes.

Fig. 4 is an enlarged sectional view of part I in Fig. 1 .

Fig. 5 is an A-A sectional view in Fig. 1 .

Fig. 6 is the second A-A sectional view in Fig. 1 .

Detailed ways

As shown in Figure 1, the utility model is composed of at least four sets of heat collecting tubes 1, the metal tubes 1 passing through each heat collecting tube 1 are respectively connected to the high-temperature water pipe 4, and the metal pipes 2 passing out of each heat collecting tube 1 The second metal pipe 3 is connected in parallel with the collective low-temperature water pipe 5 respectively.

As shown in FIG. 2 , the metal tubes 1 and 2 of two adjacent groups of heat collecting tubes can also be connected in series sequentially, and the two ports formed by the series connection are respectively connected to the collecting tube 14 and the collecting tube 15 .

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.

As shown in Figure 4, the opening end of the inner glass blind pipe 6 is gap-fitted with a round soft rubber pad 8, and two through holes are opened on the round soft rubber pad 8, and the size and shape of each through hole are respectively in line with the metal The outer diameters and shapes of the first pipe 2 and the second metal pipe 3 are compatible, and the first metal pipe 2 and the second metal pipe 3 are respectively inserted in the two through holes.

The open end of the metal pipe two 3 is connected to the collective low-temperature water pipe 5 after crossing out from the collective high-temperature water pipe 4 .

As shown in FIG. 5 , the inner glass dead tube 6 is eccentrically arranged inside the outer glass dead tube 7 , and a W-shaped light-concentrating reflector 9 is arranged between the inner glass dead tube 6 and the outer glass dead tube 7 . A solar heat absorbing film 11 is coated on the outside of the inner glass blind pipe 6 .

The first metal pipe 2 and the second metal pipe 3 are arranged in parallel in the inner glass blind pipe 6, and the blind ends of the two inner glass blind pipes 6 communicate with each other.

The cross-sections of the metal pipe 1 2 and the metal pipe 2 3 are respectively in the shape of a full circle, and four metal fins 10 arranged radially are welded and fixed on the outer surface of the metal pipe 1 2 .

As shown in Figure 6, two arc-shaped metal fins 12, 13 are welded and fixed on the outer surface of the metal tube 12, one end of the metal fin 12 is fixedly connected to the outside of the metal tube 2, and one end of the metal fin 13 is also fixedly connected Outside the metal pipe 2, one ends of the two metal fins 12, 13 are respectively bent towards each other.

During actual production, the two arc-shaped metal fins 12, 13 and the metal pipe-2 can be integrally produced through a mold.

Claims (6)

1. The double-layer glass vacuum metal tube solar collector with high output temperature includes at least three sets of heat collector tubes, and each set of heat collector tubes includes two transparent inner and outer glass blind tubes that are connected to each other in the same direction. Two glass blind pipes are fused to each other at the open ends, and a vacuum chamber is set between the two glass dead pipes, and the characteristics are: a solar heat absorbing film is arranged on the outer surface of the inner glass blind pipe; metal is arranged in parallel in the inner glass dead pipe Tube 1 and metal tube 2, metal tube 1 and metal tube 2 are connected to each other at the blind end of the inner glass blind tube, at least two metal fins are arranged outside metal tube 1, and metal tube 2 is set between the fin gaps of metal tube 1 The ends of the metal pipes 1 and 2 located at the opening end of the inner glass blind pipe pass through the inner glass blind pipe and support the opening end of the inner glass blind pipe in a gap type. 2. The double-layer glass vacuum metal tube solar collector with high output temperature according to claim 1, characterized in that the metal fins are radial, and one end of each metal fin is fixedly connected to the outside of the metal tube. 3. The double-glazed vacuum metal tubular solar collector with high output temperature according to claim 1, characterized in that there are two metal fins in an arc shape, and one end of the two metal fins is fixedly connected respectively Outside one metal pipe, the other ends are respectively bent towards each other. 4. The double-layer glass vacuum metal tubular solar collector with high output temperature according to claim 1, characterized in that a concentrating reflector is arranged between the inner and outer glass blind tubes. 5. According to claim 1 or 2 or 3 or 4, the double-layer glass vacuum metal tube solar collector with high output temperature is characterized in that the metal tubes one and two of each group of heat collecting tubes are respectively connected to the collective high temperature water pipe And sum up the low temperature water pipe. 6. According to claim 1 or 2 or 3 or 4 or 5, the double-layer glass vacuum metal tube solar collector with high output temperature is characterized in that the metal tubes one and two of adjacent two sets of heat collecting tubes are sequentially connected in series , the two ports formed by series connection are respectively connected to the two collecting pipes.

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