CN201011473Y - Double U-shaped tube pressure collector - Google Patents

Abstract

The utility model relates to a double U-shaped tube pressure-bearing heat collector. Existing pressurized solar heat collectors have a relatively complicated structure. Although the structure has been improved recently, the outlet water temperature is still not high. The utility model includes a heat collecting block, a vacuum heat collecting tube and a U-shaped inner tube, and the heat collecting block includes a thermal insulation layer, a shell, a U-shaped pipe joint, a liquid inlet pipe joint and a liquid outlet pipe joint, a fixing rod and a vacuum heat collecting pipe sealing plug . The U-shaped pipe joint, the liquid inlet pipe joint and the liquid outlet pipe joint are fixed on the fixed rod, and the U-shaped inner tube is inserted into the vacuum heat collecting tube; the liquid inlet pipe joint, the U-shaped pipe joint and the liquid outlet pipe joint are sequentially connected with the U-shaped The inner tubes are sealed and connected. Since the U-shaped inner tubes are connected in series, when the liquid flows through each U-shaped inner tube, it is continuously heated to make the outlet liquid temperature higher. The solar heat collector can be directly used to heat water, and can also be used to heat a medium and then heat water through the medium, and the installation is also very convenient; and because it can be easily assembled on site, it is convenient to transport.

Description

Double U-shaped tube pressure collector

technical field

The utility model belongs to a solar energy utilization device, in particular to a double U-shaped tube pressure-bearing solar heat collector.

Background technique

Solar energy is an inexhaustible and inexhaustible natural energy source, and the utilization of solar energy is undoubtedly a problem that people generally pay attention to. At present, there are many kinds of solar collectors on the market, among which most of the vacuum tube solar collectors are non-pressure-bearing. In recent years, in order to meet the application needs of various occasions, the pressure-bearing vacuum tube solar collectors are gradually increasing. CN01216417.8 and CN01216418.6 respectively proposed a kind of "pressure bearing type all-glass vacuum tube solar heat collector" and a kind of "pressure bearing type vacuum tube solar heat collector". The water in the inner denier of the header and the water in the pressurized heat exchange tube obtain heat through heat exchange with the hot water in the inner denier of the header, and the heated water in the pressurized heat exchange tube directly exchanges with the water in the pressurized water tank The water undergoes heat exchange, thereby increasing the temperature of the water in the pressurized tank. Since the water in the pressure-bearing heat exchange tube used in practice obtains heat by exchanging heat with the water in the inner denier of the header as the medium, the thermal efficiency is affected to a certain extent, and the structure is relatively complicated. CN200420025628.9 discloses "a kind of metal-glass heat pipe solar heat collector", which is characterized in that: the metal end with several cooling fins is plugged into the nozzle of the existing coated glass vacuum tube, and sealed with the inside of the tube The wall is cemented, and the sealed cavity formed between the glass tube and the end is injected with a suitable working fluid. Solar energy heats the medium in the vacuum tube, and the metal end obtains heat from the medium, and then transfers it to the water in the actual heat exchange tube. Similarly, the thermal efficiency is also affected to a certain extent, and the structure becomes complicated. CN200520116585.X discloses a "straight-type sub-tube pressure-bearing heat collector", which inserts a straight inner tube into the vacuum heat collecting tube, and the straight inner tube is connected with the tube body of the heat collecting block, and the solar energy is The vacuum heat collecting tube directly heats the water in the straight inner tube, realizes heat exchange with the water in the water tank through natural convection, realizes pressure-bearing operation, and improves thermal efficiency. However, the outlet water temperature of the above-mentioned pressurized solar heat collectors is not too high.

Utility model content

The utility model overcomes the deficiencies in the above-mentioned prior art, and proposes a double U-shaped tube pressure-bearing solar heat collector. The solar heat collector has reasonable structural design, convenient installation, high thermal efficiency, and high outlet liquid temperature.

The technical scheme adopted in the utility model is:

A double U-shaped tube pressure-bearing heat collector, including a heat collecting block, a vacuum heat collecting tube and a U-shaped inner tube, and the heat collecting block includes an insulation layer, a shell, a U-shaped pipe joint, a liquid inlet pipe joint and an outlet pipe. Liquid pipe joints, fixed rods and sealing plugs for vacuum heat collecting tubes; the fixed rods are located in the insulation layer of the heat collecting block; the U-shaped pipe joints are neatly arranged and fixed on the fixed rods, and the liquid inlet pipe joints and liquid outlet pipe joints It is flush with the U-shaped pipe joint and fixed on both ends of the fixed rod respectively, and the port of the U-shaped inner pipe is inserted into the vacuum heat collecting tube outward; one port of the liquid inlet pipe joint is connected with the first vacuum heat collecting tube on the liquid inlet side The first port of the U-shaped inner tube in the liquid inlet side is sealed and connected to the first port, and the second port of the U-shaped inner tube in the first vacuum heat collecting tube on the liquid inlet side is sealed and connected to the first port of the first U-shaped pipe joint. The second port of the first U-shaped pipe joint is sealed with the first port of the U-shaped inner tube in the second vacuum heat collecting tube, and the second port of the U-shaped inner tube in the second vacuum heat collecting tube It is sealed and connected with the first port of the second U-shaped pipe joint, so that it is continuously connected in series and sealed until the second port of the U-shaped inner tube in the last vacuum heat collecting tube is sealed and connected with a port of the liquid outlet pipe joint.

The port of the U-shaped pipe joint is provided with threads; the port of the U-shaped inner pipe is set as a bell mouth, and is equipped with a nut matching the thread set at the port of the U-shaped pipe joint; the liquid inlet pipe joint The port connected with the liquid outlet pipe joint and the U-shaped inner pipe is provided with the same thread as the U-shaped pipe joint port, and the other port of the liquid inlet pipe joint and the liquid outlet pipe joint is provided with the U-shaped inner pipe. The port has the same bell mouth and is configured with the same nut as the U-shaped inner tube port. In this case, the sealed connection is achieved through the threaded nut and bell mouth provided by the port. When the ports of the U-shaped inner tube, U-shaped pipe joint, liquid inlet pipe joint and liquid outlet pipe joint are not provided with corresponding threads, nuts and bell mouths, the sealing connection can also be welded or quick joint.

In the utility model, the number of vacuum heat collecting tubes to be configured, the number of U-shaped inner tubes and the number of U-shaped pipe joints depend on the size of the required heat collector. If the size of the required heat collector is used, The number of vacuum heat collecting tubes configured is n, the number of U-shaped inner tubes is also n, and the number of U-shaped pipe joints is (n-1). Usually, the inlet pipe joint, the U-shaped pipe joint and the liquid outlet pipe joint are fixed on the fixed rod by welding, and the fixed rod is kept in the heat collecting block under the action of the insulation layer. When assembling, first preset the sealing plug of the vacuum heat collecting tube at the U-shaped pipe joint, the liquid inlet pipe joint and the liquid outlet pipe joint, and connect the ports of each U-shaped inner pipe to the The U-shaped pipe joint and the ports of the liquid inlet pipe joint and the liquid outlet pipe joint, then put the vacuum heat collecting tube on the outside of the U-shaped inner tube and insert the end of the heat collecting block into the insulation layer, and at the same time cover the vacuum heat collecting tube sealing plug tightly . When the incoming liquid enters the U-shaped inner tube through the liquid inlet pipe joint, the vacuum heat collecting tube heats it under the action of solar energy; since n U-shaped inner tubes are connected in series through the U-shaped pipe joint, there are n The vacuum heat collecting tube heats the liquid, so that the temperature of the liquid flowing out from the joint of the liquid outlet pipe is higher.

The utility model can be directly used for heating water, and can also be used for heating a medium, and then the water is heated through the medium. When directly used for heating water, the other port of the liquid inlet pipe joint is directly connected with the water supply pipe, and the other port of the liquid outlet pipe joint is then connected with the water storage tank. When it is used to heat the medium and then heat the water through the medium, the medium is placed in a circulating loop with a heating coil, the utility model is connected to the circulating loop, and then the heating coil is placed in the water storage tank , The medium circulates in the circulation loop, and when it flows through the U-shaped inner tube, it obtains heat from the vacuum heat collecting tube, and heats the water in the water storage tank when it flows through the heating coil.

The utility model is carefully designed, scientific and reasonable, and compared with general solar collectors, its thermal efficiency and outlet liquid temperature are greatly improved, especially when the port of the U-shaped inner tube is provided with a bell mouth and is equipped with a nut, a U When the port of the U-shaped pipe joint is provided with threads, the port connected to the U-shaped inner pipe of the inlet pipe joint and the liquid outlet pipe joint is provided with threads, and the other end is provided with a bell mouth and a nut, the installation is very convenient. Since on-site assembly can be conveniently carried out, transportation is also facilitated.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a schematic diagram of a U-shaped inner tube in an embodiment of the present invention shown in Fig. 1 .

Fig. 3 is a schematic diagram of a U-shaped pipe joint in an embodiment of the present invention shown in Fig. 1 .

Fig. 4 is a schematic view of the inlet pipe joint and the liquid outlet pipe joint in one embodiment of the present invention shown in Fig. 1 .

Detailed ways

As shown in Figure 1, it includes a heat collecting block 1, 12 vacuum heat collecting tubes 2, and 12 U-shaped inner tubes 5, wherein the heat collecting block 1 includes an insulating layer 3, a shell 4, 11 U-shaped pipe joints 6, Liquid inlet pipe joint 7, liquid outlet pipe joint 8, fixed rod 9, vacuum heat collecting tube sealing plug 10. The fixed rod 9 is located in the thermal insulation layer 3 of the heat collecting block 1; the U-shaped pipe joints 6 are neatly arranged and fixed on one side of the fixed rod 9, and the liquid inlet pipe joint 7 and the liquid outlet pipe joint 8 are respectively fixed flush with the U-shaped pipe joints 6 At both ends of the fixed rod 9. The port of the U-shaped pipe joint 6 is provided with a thread 11, as shown in Figure 3; the port of the U-shaped inner pipe 5 is set as a bell mouth 12, and is equipped with a nut 13 that matches the thread 11 provided at the port of the U-shaped pipe joint 6 , as shown in Figure 2; the port where the liquid inlet pipe joint 7 and the liquid outlet pipe joint 8 are connected to the U-shaped inner pipe 5 is provided with the same thread 11 as the U-shaped pipe joint 6 port, and the other port is provided with the same thread 11 as the U-shaped pipe joint 6 port. The same bell mouth 12 is set at the port of the inner tube 5, and is equipped with the same nut 13 as that configured at the port of the U-shaped inner tube 5, as shown in Figure 4; The first port of the U-shaped inner tube 5 in the vacuum heat collecting tube 2 is sealed and connected, and the second port of the U-shaped inner tube 5 in the first vacuum heat collecting tube 2 on the liquid inlet side is connected to the first U-shaped pipe joint The first port of 6 is sealed and connected, the second port of the first U-shaped pipe joint 6 is sealed with the first port of the U-shaped inner tube 5 in the second vacuum heat collecting tube 2, and the second vacuum collector The second port of the U-shaped inner pipe 5 in the heat pipe 2 is sealingly connected with the first port of the second U-shaped pipe joint 6, so that the continuous series is sealed and connected until the second end of the eleventh U-shaped pipe joint 6. The first port is sealed with the first port of the U-shaped inner tube 5 in the twelfth vacuum heat collecting tube 2, and the second port of the U-shaped inner tube 5 in the twelfth vacuum heat collecting tube 2 is connected with the liquid outlet pipe. The corresponding ports of the connector 8 are connected tightly. Sealed connections are made via threaded nuts and flares provided by the ports. The vacuum heat collecting tube 2 is set on the outside of the U-shaped inner tube 5 and its end is inserted into the thermal insulation layer 3 of the heat collecting block 1, and the sealing plug 10 of the vacuum heat collecting tube is tightly covered.

The double U-tube pressure-bearing heat collector can be connected with the water supply pipe and the water storage tank for directly heating the water, and can also be connected to the medium circulation loop, through the coil in the circulation loop, the water is heated by the medium.

Claims (2)

1. A double U-shaped tube pressure-bearing heat collector, comprising a heat collecting block (1) and a vacuum heat collecting tube (2), and the heat collecting block (1) includes an insulating layer (3) and a housing (4) ; It is characterized in that: it also includes a U-shaped inner tube (5); the heat collecting block (1) also includes a U-shaped pipe joint (6), a liquid inlet pipe joint (7) and a liquid outlet pipe joint (8), The fixed rod (9) and the sealing plug (10) of the vacuum heat collecting tube; the fixed rod (9) is located in the thermal insulation layer (3) of the heat collecting block (1); the U-shaped pipe joints (6) are neatly arranged and fixed on the fixed The rod (9), the inlet pipe joint (7) and the liquid outlet pipe joint (8) are flush with the U-shaped pipe joint (6) and respectively fixed on the two ends of the fixed rod (9), and the U-shaped inner pipe (5) The port is inserted into the vacuum heat collecting tube (2) outward; one port of the liquid inlet pipe joint (7) is connected to the U-shaped inner tube (5) in the first vacuum heat collecting tube (2) on the liquid inlet side. The first port is sealed and connected, the second port of the U-shaped inner tube (5) in the first vacuum heat collecting tube (2) on the liquid inlet side is sealed with the first port of the first U-shaped pipe joint (6) connection, the second port of the first U-shaped pipe joint (6) is sealed with the first port of the U-shaped inner tube (5) in the second vacuum heat collecting tube (2), and the second vacuum heat collecting tube The second port of the U-shaped inner tube (5) in (2) is sealed and connected with the first port of the second U-shaped pipe joint (6), so that it is connected in series and sealed until the last vacuum heat collecting tube (2) ) The second port of the U-shaped inner tube (5) is in sealing connection with a port of the outlet pipe connector (8). 2. The double U-shaped tube pressure-bearing heat collector according to claim 1, characterized in that: the port of the U-shaped pipe joint (6) is provided with threads (11); the U-shaped inner tube (5 ) port is set as a bell mouth (12), and is equipped with a nut (13) that matches the thread (11) set at the U-shaped pipe joint (6) port; the inlet pipe joint (7) and the outlet The port where the liquid pipe joint (8) is connected to the U-shaped inner pipe (5) is provided with the same thread (11) as the port of the U-shaped pipe joint (6), and the liquid inlet pipe joint (7) and the liquid outlet The other port of the pipe joint (8) is provided with the same bell mouth (12) as that of the port of the U-shaped inner tube (5), and is equipped with the same nut as that of the port of the U-shaped inner tube (5) (13).

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