CN200979304Y - Direct-through type whole-glass vacuum heat-collecting tube solar energy water heater - Google Patents

Abstract

Straight-through all-glass vacuum heat-collecting tube solar water heater belongs to the field of solar energy utilization devices, and mainly solves the problem that stagnant water and dirt always accumulate in all-glass vacuum solar heat collectors and cannot be discharged cleanly; the feature is that the solar heat collector is made of It consists of straight-through all-glass vacuum heat collecting tubes (4) and lower headers (5) with double-ended openings in a row, and the inner glass tube (11) of the straight-through all-glass vacuum heat collecting tubes (4) has a spiral mouthpiece (14), the lower end of which is flared and welded together with the outer glass tube (12) to form a lower end opening (15), or the main body of the inner glass tube (11) has corrugated bodies that are continuously distributed or discontinuous Group-shaped corrugated body (20) type distribution; beneficial effect: no old water and dirt will accumulate in the solar collector, easy to clean, descale, and antifreeze, high thermal efficiency, full use of heat energy, and no metal and glass The non-removable sealing connection of the vacuum heat collecting tube is easy to produce, low in cost, high in reliability, and has a long working life. The heat load and expand its function are also conducive to the combination with the building.

Description

Straight-through all-glass vacuum collector tube solar water heater

technical field

The utility model belongs to the field of solar energy utilization devices and relates to a straight-through solar water heater with all-glass vacuum heat collecting tubes.

Background technique

In the prior art, the conventional household compact vacuum heat collecting tube solar water heater is mainly composed of three parts: a hot water storage tank, a solar heat collector and a support. There are three types as follows: one is all-glass vacuum heat collecting tube, the other is vacuum heat collecting tube with heat pipe, and the third is vacuum heat collecting tube with metal heat absorbing body. The common structure of the three solar collectors is to adopt A glass vacuum tube structure with one end closed and one end open. The open ends of each glass vacuum tube are respectively connected to the hot water storage tank, while the closed ends are independent of each other and cannot be connected. The water inlet and outlet are all set on the hot water storage tank. The hot water stored in the hot water storage tank, except that there is no hot water in the vacuum heat collecting tube with heat pipes, the hot water stored in the other two kinds of all glass vacuum heat collecting tubes or metal heat absorbing bodies are difficult to use because they cannot be discharged. And there will always be old water and water dirt accumulated, so the amount of available hot water is always less than the total amount of hot water heated by solar energy, which affects the full utilization of the water heater and reduces the thermal efficiency. And the vacuum heat collecting tube with heat pipe must adopt the non-removable sealing connection technology of metal heat pipe and metal and glass vacuum heat collecting tube, which not only increases the material cost, but also has complicated production process and needs special equipment, so the production cost is increased. There is metal and glass hermetically connected together, which reduces the reliability and working life of the finished product.

Contents of the invention

Technical issues resolved

A straight-through all-glass vacuum heat collecting tube solar water heater is provided. By changing the structure of the glass vacuum heat collecting tube and adopting a straight-through all-glass vacuum tube with double-ended openings, the deficiencies in the prior art can be overcome, and the system can be heated by solar energy. All the hot water is discharged and utilized, so that stale water and water dirt do not accumulate in the glass vacuum heat collecting tube, the heat energy is fully utilized, and the thermal efficiency is improved. The production process is simple, the cost is low, the reliability is high, the working life is long, and the function of the solar water heater can be expanded.

The technical solution adopted:

The straight-through all-glass vacuum heat collecting tube solar water heater is composed of a hot water storage tank with an exhaust port and a sensor port, a solar heat collector, a corresponding bracket and an insulation layer. It is characterized in that the solar heat collector is composed of a row type It is composed of straight-through all-glass vacuum heat collecting tubes with double-ended openings and a lower header. The upper openings of each vacuum heat collecting tube are respectively connected to the hot water storage tank through a silicone rubber sealing interface, and the lower openings of each vacuum heat collecting tube are respectively sealed by silicon rubber. The interface is connected with the lower header box, and the lower header box has supply and drainage interfaces.

Beneficial effect:

Since the solar heat collector is composed of straight-through all-glass vacuum heat collecting tubes with double-ended openings, all the hot water heated by solar energy in the solar heat collector can be discharged and utilized, and the hot water storage tank and glass vacuum heat collecting tube can be used There is no accumulation of old water and water dirt, full use of heat energy, high thermal efficiency and antifreeze; no need for and no problem of non-removable sealing connection between metal and glass vacuum heat collector tubes, simple production process, low cost, high reliability, and long working life , At the same time, the glass vacuum heat collecting tube is easy to lengthen, and the heat transfer medium in the glass vacuum heat collecting tube can run in both directions, thereby increasing the load of the water heater and expanding its function, and is also conducive to the combination of buildings.

Description of drawings

Figure 1. Schematic diagram of the overall composition and structure;

Fig. 2, the structure diagram of straight-through all-glass vacuum heat collecting tube 4, (a) the inner glass tube 11 has a spiral mouthpiece 14; (b) the inner glass tube 11 has a corrugated body;

Figure 3. Schematic diagram of the overall composition and structure of a solar water heater with forced circulation and indirect heating;

Detailed ways

Further detailed explanation in conjunction with accompanying drawing:

As shown in Figure 1, the all-glass vacuum solar collector 2 is obliquely fixed on the support 3, the hot water storage tank 1 and the lower header 5 are supported by the support 3, and the straight-through all-glass vacuum heat collection tube 4 with double-ended openings, etc. They are grouped together in a spaced manner, and the corresponding parts are provided with insulation layers 10, and the silicone rubber sealing interface 6 has a sealing effect at the same time; The exhaust port 7 and the sensor port 8 for measuring water level and water temperature are all located on the top of the hot water storage tank 1 .

As shown in Figure 2, the basic structure of the straight-through all-glass vacuum heat collecting tube 4 is to have an inner glass tube 11, an outer glass tube 12 and a vacuum chamber 13 between the two tubes, and a steel pipe for fixing the inner glass tube 11 is housed in the cavity. Card 17, the outer surface of the inner glass tube 11 has an absorbing coating 18, and a getter 19 is attached to the inner surface of the proximal end of the outer glass tube 12, and the double-ended openings are the upper opening 16 and the lower opening 15; The structure of the tube 11 has two types, as shown in (a), the lower port of the inner glass tube 11 is welded with a spiral mouthpiece 14, and the lower end of the mouthpiece is flared and the outer glass tube 12 is welded together and Form the lower end opening 15; or as shown in (b), the main body of the inner glass tube 11 has corrugated bodies that are distributed in a continuous manner, or distributed in a discontinuous group of corrugated bodies 20, and the group of corrugated bodies 20 consists of 1～ Composed of 6 continuous corrugated bodies, the grouped corrugated bodies 20 are located near one end, both ends, or the middle part of the inner glass tube 11, or both. The specifications and dimensions of the spiral mouth pipe 14 or the corrugated body and the grouped corrugated body 20 are determined according to the specific requirements of the straight-through all-glass vacuum heat collecting tube 4, and its function is to effectively buffer the inner glass tube 11 caused by thermal expansion and contraction. stress changes to avoid cracking.

As shown in Figure 3, the specific structure of the solar water heater with forced circulation and indirect heating structure is: the lower circulation pipe 21 is installed on the hot water storage tank 1, and the heat exchanger 23 in the heating tank 22 is connected to the circulation pump 24. The water inlet and the lower header 5 are equipped with an upper circulation pipe 25 and are connected to the water outlet of the circulation pump 24. The heating tank 22 is also equipped with an auxiliary heating device 26, and the heating tank 22 is equipped with a corresponding safety valve 27 and a pressure pair. Interface 28 and external water outlet interface 29. The essence of this structure is that the solar collector and the hot water storage tank are separated. As shown in Figure 3, the hot water storage tank 1 is actually the upper header of the all-glass vacuum solar collector 2, and the all-glass vacuum solar collector 2. The water or other heat transfer medium directly heated by solar energy, through the forced circulation system, the heat exchanger 23 transfers heat to the water body in the heating tank 22 to generate hot water, and is automatically pressured by the pressure cold water entering the water inlet port 28 It is used through the pressure discharge of the external water outlet 29. When the solar energy is insufficient, start the auxiliary heating device 26; application in engineering systems.

The corrugated body structure, 2 refers to a water corrugated type similar to concentric circles, and the radial cross-sections on the corrugated body are all ring-shaped in the shape of a washer.

Claims (3)

1. Straight-through all-glass vacuum heat collector tube solar water heater is composed of a hot water storage tank with an exhaust port and a sensor port, a solar heat collector, a corresponding bracket and an insulation layer. It is characterized in that: the solar heat collector is composed of rows It is composed of a straight-through all-glass vacuum heat collecting tube with double-ended openings and a lower header. The upper openings of each vacuum heat collecting tube are connected to the hot water storage tank through a silicone rubber sealing interface, and the lower openings of each vacuum heat collecting tube are respectively connected through silicon rubber. The rubber sealing interface is connected with the lower header, and the lower header has supply and drainage interfaces. 2. The straight-through all-glass vacuum heat-collecting tube solar water heater according to claim 1, characterized in that: the basic structure of the straight-through all-glass vacuum heat-collecting tube (4) has an inner glass tube (11), an outer glass tube ( 12) and the vacuum cavity (13) between the two tubes, the steel clip (17) for fixing the inner glass tube (11) is housed in the cavity, and the outer surface of the inner glass tube (11) has an absorbing coating (18), Also have getter (19) to be attached on the near-end portion inner surface of outer glass tube (12), double-ended opening is upper end opening (16) and lower end opening (15); With regard to the structure of inner glass tube (11), there are Two types, the lower port of the inner glass tube (11) is welded with a spiral mouthpiece (14), and the lower end of the mouthpiece is flared and welded with the outer glass tube (12) to form a lower opening (15); or The main body of the inner glass tube (11) has corrugated bodies distributed continuously, or discontinuously distributed in group-shaped corrugated bodies (20), and the group-shaped corrugated bodies (20) consist of 1 to 6 continuous corrugated bodies Composition, the group corrugated body (20) is located near one end, both ends, or the middle part of the inner glass tube (11), or both. 3. The straight-through all-glass vacuum heat-collecting tube solar water heater according to claim 1 or 2, characterized in that: the lower circulation pipe (21) is installed on the hot water storage tank (1), and passes through the heating tank (22). The heat exchanger (23) of the heat exchanger (23) is connected to the water inlet of the circulation pump (24), and the upper circulation pipe (25) is housed on the lower header (5) and is connected with the water outlet of the circulation pump (24). Auxiliary heating device (26) is housed, and corresponding safety valve (27) and pressure pair inner water inlet interface (28) and outer water outlet interface (29) are housed on the heating tank (22).

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