CN2380867Y - Composite vacuum-tube solar heat-collector - Google Patents

Abstract

The utility model relates to a composite vacuum pipe solar heat collector. One metal bearing inner chamber is contained in the glass vacuum pipe. An interlayer is formed between a pipe wall in the vacuum pipe and the inner chamber. A coating is coated on the outer wall of an inner pipe. A water inlet pipe and a water outlet pipe are connected to the right part of the inner chamber and are respectively connected with a water inlet pipeline and a water outlet pipeline. A groove is arranged on the left part of an insulating sleeve. The vacuum pipe and the right part of the inner chamber are inserted into the groove. A sealing ring is arranged between the vacuum pipe and the insulating sleeve. The structure is characterized in that heat collection and energy storage are combined into a whole body. The utility model has the advantages of thermal efficiency enhancement, convenient installation, and mutual series connection for multiple heat collectors for increasing the capacity of the heat collectors.

Description

Compound vacuum tube solar collector

The utility model relates to a composite vacuum tube solar heat collector, which integrates heat collection and energy storage, and belongs to the technical field of solar energy equipment.

Existing solar water heater, its vacuum heat collecting tube is connected together with water storage tank during its work, and cold water flows into water storage tank again after being heated in heat collecting tube. Since the water is heated in a three-dimensional closed space and exchanges heat with the cold water in the water storage tank through convection, the start-up speed of the water heater is slow and the thermal resistance is large, so that the thermal efficiency of the water heater is very low; and because the hot water is stored and kept in the water storage tank, However, there is no reliable guarantee for the quality of the water tank, and the heat loss is large; in addition, due to the special connection between the glass heat collecting tube and the water tank, the pressure bearing capacity of the whole machine is poor, especially when the vacuum tube is empty, the upper water tube is easy to burst, which increases the need for dismantling and repairing trouble, and even cause unsafe accidents. When the user needs to increase the capacity, it is costly and the installation is complicated.

The purpose of this utility model is to provide a composite vacuum tube solar heat collector, which can overcome the above-mentioned shortcoming. It combines heat collection and energy storage into one, which can improve thermal efficiency and ensure a certain pressure bearing capacity. It is also very convenient for future capacity expansion and modification.

The purpose of this utility model is achieved in that a metal pressure-bearing liner (2) is contained in the all-glass vacuum tube (1). The right end of the liner (2) is exposed outside the vacuum tube (1), and an interlayer (11) is formed between the inner tube wall (10) of the all-glass vacuum tube (1) and the pressure-bearing liner (2). The outer wall of the inner tube (10) is coated with a selective absorbing coating (12). An outlet pipe (4) and a water inlet pipe (7) are connected above the right part of the inner container (2), and the water inlet pipe (7) is connected with the water inlet pipeline (8). The water outlet pipeline (4) is connected with the water outlet pipeline (6) and the valve (5). In the all-glass vacuum tube (1) and the right part of the pressurized inner container (2) and the electric outlet pipe (4), (7) contain a thermal insulation cover (3), the thermal insulation cover (3) has a groove (13) on the right side, The right end of the all-glass vacuum tube (1) and the metal pressure-bearing liner (2) enters the groove (13). There is a sealing ring (9) between the all-glass vacuum tube (1) and the insulation cover (3). A plurality of heat collectors can be connected in series, so that the water outlet (4) of one is connected with the water inlet pipe (7) of the other.

Figure 1. Composite vacuum collector

Figure 2. Schematic diagram of composite vacuum collector combination

Hereby in conjunction with accompanying drawing the structure of composite vacuum tube solar collector is described in detail:

From Fig. 1, the all-glass vacuum tube (1) of the composite vacuum heat collector contains a metal pressure-bearing liner (2). But the right end of the liner (2) is exposed outside the vacuum tube (1), and an interlayer (11) is formed between the inner tube wall (10) of the all-glass vacuum tube (1) and the pressure-bearing liner (2), and there is air heat conduction in the interlayer Fins and heat transfer medium, while the outer wall of the inner tube (10) is coated with a selective absorbing coating (12). The inner tank (2) is connected with the water outlet pipe (4) and the water inlet pipe (7) above the right part, the water inlet pipe (7) is connected with the water inlet pipe (8), and the water outlet pipe (4) is connected with the water outlet pipe (6) and valve (5). In the all-glass vacuum tube (1) and the right part of the metal pressure-bearing liner (2) and the inlet and outlet pipes (4) and (7) contain a thermal insulation cover (3), the left end of the thermal insulation cover (3) has a groove (13) , the all-glass vacuum tube (1) and the right-hand side of the metal pressure-bearing liner (2) can enter in the groove (13). There is a sealing ring (9) between the all-glass vacuum tube (1) and the heat preservation cover (3), so that the inner bag (2) is sealed in the heat preservation cover (3).

From Figure 2, when the capacity is increased, two or more heat collectors can be connected in series, and multiple heat collectors can be connected in series, so that one water outlet (4) is connected to the other water inlet pipe ( 7) Connect to each other.

Water supply will be needed earlier when starting to use, and the valve (5) can be opened to allow cold water to enter from the water inlet pipe (7), until the cold water flows out from the water outlet pipe (4), at this moment the valve (5) should be closed. Under the condition of solar radiation, the coating (12) coated on the outer wall of the inner tube (10) of the all-glass vacuum tube (1) starts to absorb heat, and the inner layer is heated through the air heat conducting fins in the interlayer (11) or other heat conducting media. Cold water in the gallbladder (2) just opens valve (5) when using water. If the capacity of one heat collecting tube is not enough, multiple sets can be connected in series and connected according to Figure 2.

Compared with the prior art, the composite vacuum tube solar collector has the following advantages: 1. After the heat collector tube absorbs heat, it directly heats the stored cold water without long-distance convection circulation, which can improve thermal efficiency. 2. The insulation layer is a vacuum layer with a vacuum degree of up to 5×10 ^-1 Pa and an anti-reflection layer, so the insulation performance is excellent. 3. Adopting the structure of pressure-bearing inner tank and top water intake, the combined installation is very simple, which makes the operation of the solar water heater easy. 4. The liner can bear the pressure above 0.6mpa.

Claims (2)

1. combined type vacuum tube solar heating element, it is characterized in that: contain a metal pressure-bearing inner bag (2) in the all-glass vacuum tube (1), the right-hand member of this inner bag (2) is exposed to vacuum tube (1) outside, form an interlayer (11) between the inner tubal wall (10) of all-glass vacuum tube (1) and the pressure-bearing inner bag (2), interior pipe (10) outer wall scribbles coating for selective absorption (12), inner bag (2) is connected with outlet pipe (4) and water inlet pipe (7) above the right part, water inlet pipe (7) is connected with inlet pipeline (8), outlet pipeline (4) connects outlet pipeline (6) and valve (5), at all-glass vacuum tube (1) and pressure-bearing inner bag (2) right part and electric outlet pipe (4), (7) contain a muff (3), muff (3) right part fluted (13), all-glass vacuum tube (1) and metal pressure-bearing inner bag (2) right-hand member enter in the groove (13), between all-glass vacuum tube (1) and muff (3) sealing ring (9) are arranged.

2. heat collector according to claim 1 is characterized in that: many heat collectors can be connected in series mutually, and a delivery port (4) and another water inlet pipe (7) are connected to each other.

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