CN205002426U - Water storage formula solar energy collection pipe and pressure -bearing formula solar water heater - Google Patents

Abstract

The utility model relates to a water storage type solar heat collecting tube and a pressure-bearing solar water heater installed with the heat collecting tube. A structure with a cavity inside, the water storage device is made of hard thermally conductive material; the water storage device is provided with a water inlet pipe and a water outlet pipe to communicate with the inner cavity; the pressure-bearing solar water heater includes at least two of the above-mentioned water storage solar water heaters The heat collecting pipe, and its water storage device is communicated through connecting water pipes to form a series structure, and has a water inlet main pipe and a water outlet main pipe to communicate with the series structure. Since the water storage device is arranged inside the inner tube of the heat collecting tube, the heat collecting tube and the water heater can operate under pressure, and tap water can be directly connected to the water inlet pipe of the water storage device, and the medium in the water storage device can absorb sunlight heat and heat up; and The water heater does not need to be provided with a water storage tank, which can simplify the structure of the water heater.

Description

Water-storage solar heat collector tube and pressurized solar water heater

technical field

The utility model relates to the field of solar water heaters, in particular to a water storage type solar heat collecting tube and a pressurized solar water heater equipped with the heat collecting tube.

Background technique

A traditional solar water heater basically includes two parts: an upper water storage tank and a lower heat collecting tube, wherein the heat collecting tube is usually a cup-shaped structure with one end being an open end and the other end being a closed end. The tube wall of the heat collecting tube is made of double-layer glass. The inner glass is called the inner tube, and the outer glass is called the outer tube. The surface of the inner tube is coated with a light-absorbing layer that absorbs the heat of the sun. It is a vacuum, which can prevent the heat loss inside the inner tube.

When the water heater is working, water is stored inside the water storage tank and the inner tube of the heat collecting tube. When the sunlight irradiates the heat collecting tube, the light-absorbing layer absorbs the heat of the sunlight and makes the temperature of the water inside the inner tube rise. The density of high-temperature water becomes lower and floats up, high-temperature water flows into the upper water storage tank, while low-temperature water in the water storage tank flows back to the heat collecting tube, thus forming a temperature difference cycle, and finally the water in the water heater can be heated to a higher temperature.

However, in the solar water heater with the above design, since the inner tube and the outer tube of the heat collecting tube are made of glass, and there is a vacuum between the inner tube and the outer tube, in order to avoid the rupture of the inner tube, the water heater cannot operate under pressure, that is, the water heater It cannot be directly connected to the water pipe. And then cause the water heater must be placed in the height of the building, allowing the hot water in the water storage tank to flow down with gravity to reach the end of use.

Utility model content

The first technical problem to be solved by the utility model is to provide a water-storage solar heat collector tube, the water storage device inside of which can operate under pressure, and tap water can directly lead to the heat-collector tube.

The second technical problem to be solved by the utility model is to provide a pressure-bearing solar water heater using the above-mentioned solar heat collecting tube, which can operate under pressure, and tap water can be connected to the water heater.

The technical scheme that the utility model solves its technical problem adopts is:

The water-storage solar heat collection tube includes a heat collection tube body, the heat collection tube body includes an inner tube and an outer tube, the inner tube is coated with a light-absorbing layer, and the space between the inner tube and the outer tube is vacuum or filled with heat-insulating gas. There is also a water storage device inside the inner tube, the water storage device is a sealed structure with a cavity inside, and the water storage device is made of hard thermally conductive material; the water storage device is provided with a water inlet pipe and a water outlet pipe, One end of the water inlet pipe and the water outlet pipe respectively lead to the inner cavity of the water storage device, and the other ends of the water inlet pipe and the water outlet pipe respectively lead to the outside of the water storage device from the end of the water storage device close to the opening of the inner pipe.

Further, the water storage device includes a water storage pipe body and a sealing plate, the water storage pipe body is a cup-shaped structure, and the open end of the water storage pipe body is sealingly connected with the sealing plate.

Further, the water inlet pipe leads to the bottom of the inner cavity of the water storage device, and the water outlet pipe leads to the top of the inner cavity of the water storage device.

Further, a sealing ring is provided between the water storage device and the inner tube.

The pressurized solar water heater includes at least two water storage solar heat collecting tubes, the water storage type solar heat collecting tubes include a heat collecting tube body, the heat collecting tube body includes an inner tube and an outer tube, the inner tube is coated with a light-absorbing layer, The inner tube and the outer tube are vacuumed or filled with heat-insulating gas, and a water storage device is arranged inside the inner tube, the water storage device is a sealed structure with a cavity inside, and the water storage device is a hard Made of thermally conductive material; the water storage device is provided with a water inlet pipe and a water outlet pipe, one end of the water inlet pipe and the water outlet pipe are respectively connected to the inner cavity of the water storage device, and the other ends of the water inlet pipe and the water outlet pipe are respectively connected to the water storage device. One end of the opening of the inner tube leads to the outside of the water storage device; the adjacent water storage type solar collector tube, its water storage device is connected through the connecting water pipe and forms a series structure, and the water inlet pipe of the first water storage device in the series structure is connected There is a main water inlet pipe, and the water outlet pipe of the last water storage device in the series structure is connected with the main water outlet pipe.

Further, a sealing ring is provided between the water storage device and the inner tube.

Further, it also includes a shell, the inside of which is filled with thermal insulation material, and the thermal insulation material wraps the end of the heat collecting pipe body where the water inlet main pipe, the connecting water pipe, the water outlet main pipe and the sealing ring are located; Shell out.

Further, the connecting water pipe and the main water outlet pipe are wrapped with thermal insulation materials.

Further, the water storage device includes a water storage pipe body and a sealing plate, the water storage pipe body is a cup-shaped structure, and the open end of the water storage pipe body is sealingly connected with the sealing plate.

Further, the water inlet pipe leads to the bottom of the inner cavity of the water storage device, and the water outlet pipe leads to the top of the inner cavity of the water storage device.

The beneficial effects of the utility model are: the water storage type solar collector tube and the pressurized solar water heater of the utility model are equipped with a water storage device inside the inner tube of the heat collector tube, and have a water inlet pipe and a water outlet pipe connected to the water storage device, Tap water or other pressured heat transfer medium can be directly connected to the water inlet pipe of the water storage device. When the medium flows through the water storage device of the heat collecting tube, the light-absorbing layer of the inner tube of the heat collecting tube absorbs the heat of sunlight and transfers it to the water storage device. The temperature of the heat transfer medium inside is raised, and then the high temperature heat transfer medium flows out from the outlet pipe. When the pressurized solar water heater is installed with multiple water storage solar collector tubes in series, the heat transfer medium can be heated to a higher temperature. Since the water heater operates under pressure, the heated heat transfer medium can be transported from a low place It can be used at a high place; and the water heater does not need to be provided with a water storage tank, which can simplify the structure of the water heater.

Description of drawings

Fig. 1 is the schematic diagram of a kind of embodiment of water storage type solar collector tube of the present utility model;

Fig. 2 is the schematic diagram of an embodiment of the pressurized solar water heater of the present invention;

The reference signs of the components in the figure are: water storage type solar heat collector tube 1, heat collector tube body 11, water storage device 12, sealing plate 13, sealing ring 14, main water inlet pipe 20, water inlet pipe 21, water outlet pipe 22, connecting water pipe 25 , water outlet main pipe 29, shell 3, thermal insulation material 31.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

The water storage type solar heat collection tube includes a heat collection tube body 11, the heat collection tube body 11 includes an inner tube and an outer tube, the inner tube is coated with a light-absorbing layer, and the space between the inner tube and the outer tube is vacuum or filled with heat-insulating gas, The inside of the inner pipe is also provided with a water storage device 12, the water storage device 12 is a sealed structure with a cavity inside, and the water storage device 12 is made of a hard thermally conductive material; the water storage device 12 is provided with The water inlet pipe 21 and the water outlet pipe 22, one end of the water inlet pipe 21 and the water outlet pipe 22 lead to the inner cavity of the water storage device 12 respectively, and the other ends of the water inlet pipe 21 and the water outlet pipe 22 are respectively from the water storage device 12 near the opening of the inner pipe. One end leads to the outside of the water storage device 12 .

The basic principle of this water storage type solar collector tube is to install a water storage device inside the inner tube of the vacuum heat collector tube. The water storage device can withstand a certain pressure without deformation, so that the heat collector tube can be used under pressure, and the vacuum heat collector tube The heat of the sun's rays can be transferred to the water storage device, so that the temperature of the heat transfer medium rises, and the function of the heat collecting tube is realized.

Specifically, as shown in Figure 1, the heat collecting tube body 11 can be a traditional vacuum heat collecting tube, which is a cup-shaped structure made of double-layer glass, and its inner tube is coated with a light-absorbing layer for absorbing sunlight heat, and the inner tube and The vacuum between the outer tubes can prevent the heat loss in the heat collecting tube body 11. Obviously, the inner and outer tubes can also be filled with a gas with better thermal insulation, such as an inert gas. In addition, the heat collecting tube body 11 can also be an unconventional heat collecting tube, such as a straight-through vacuum heat collecting tube. Its basic structure is that the tube wall is a straight-through tube made of double-layer glass. vacuum.

A water storage device 12 is arranged inside the inner tube of the heat collecting tube body 11, and the water storage device 12 is used to store heat transfer medium, which may be water in general, or antifreeze or other substances. The material of the water storage device 12 is hard, which means that the interior of the water storage device 12 can withstand a certain pressure without large deformation. Not enough to cause the inner tube to burst. The material of the water storage device 12 needs to have thermal conductivity, which means that the water storage device 12 has good thermal conductivity, so that the heat absorbed by the inner tube of the heat collecting tube body 11 can be quickly transferred to the inside of the water storage device 12 . The preferred material of the water storage device 12 may be stainless steel, aluminum alloy, copper, thermally conductive engineering plastics, and the like.

The water storage device 12 is a sealed structure with a cavity inside. For example, it may be two cup-shaped structures. The mouths of the cups are connected by threads, and the joints are in a sealed state. Preferably, the water storage device 12 may also include a water storage pipe body and a sealing plate 13 , the water storage pipe body is a cup-shaped structure, and the open end of the water storage pipe body is sealed with the sealing plate 13 . This preferred mode is more convenient to manufacture. The specific sealing method may be to use a sealing ring, a sealant, or to form a seal by welding.

The water inlet pipe 21 and the water outlet pipe 22 lead to the cavity inside the water storage device 12 , the heat transfer medium can flow into the water storage device 12 from the water inlet pipe 21 , and flow out from the water outlet pipe 22 after being heated by sunlight.

Preferably, the water inlet pipe 21 may lead to the bottom of the inner cavity of the water storage device 12 , and the water outlet pipe 22 may lead to the top of the inner cavity of the water storage device 12 .

When the water storage type solar heat collector tube of the present invention is arranged according to the position shown in Figure 1, the heat transfer medium, such as water, can directly flow into the bottom of the water storage device 12 from the water inlet pipe 21, gradually rise to the water outlet pipe 22, and then flow out . Such a setting method can allow water to flow upwards from the lowest position of the inner tube of the heat collecting tube body 11 to the highest position of the inner tube of the heat collecting tube body 11, increasing the contact time of the light-absorbing layer of the inner tube during the flow of the water flow, and increasing the solar energy. Light and heat utilization.

Further, in order to prevent heat loss from the gap between the inner tube and the water storage device 12 , a sealing ring 14 may be provided between the water storage device 12 and the inner tube.

The pressurized solar water heater includes at least two water storage solar heat collection tubes 1, the water storage type solar heat collection tube 1 includes a heat collection tube body 11, and the heat collection tube body 11 includes an inner tube and an outer tube, and the inner tube is coated with There is a light-absorbing layer, the inner tube and the outer tube are vacuumed or filled with heat-insulating gas, and a water storage device 12 is arranged inside the inner tube, and the water storage device 12 is a sealed structure with a cavity inside. The water storage device 12 is made of hard thermally conductive material; the water storage device 12 is provided with a water inlet pipe 21 and a water outlet pipe 22, and one end of the water inlet pipe 21 and the water outlet pipe 22 leads to the inner cavity of the water storage device 12 respectively, The other ends of the water inlet pipe 21 and the water outlet pipe 22 lead to the outside of the water storage device 12 from the end of the water storage device 12 close to the opening of the inner pipe respectively; And form a series structure, the water inlet pipe 21 of the first water storage device 12 in the series structure is connected with the water inlet main pipe 20, and the water outlet pipe 22 of the last water storage device 12 in the series structure is connected with the water outlet main pipe 29.

The pressurized solar water heater of the present utility model adopts at least two aforementioned water storage type solar heat collector tubes, and the adjacent water storage type solar heat collector tubes 1 are connected in series, that is, the first water storage tube 25 is connected The outlet pipe 22 of the water-type solar heat collecting pipe 1 water storage device 12 communicates with the water inlet pipe 21 of the second water storage type solar heat collecting pipe 1 water storage device 12; the second water storage type solar heat collecting pipe 1 water storage device 12 The water outlet pipe 22 communicates with the water inlet pipe 21 of the water storage device 12 of the third water storage type solar heat collection tube 1 until it communicates with the water storage device 12 of the Nth water storage type solar heat collection tube 1 .

In the water storage type solar collector tube 1 of the above-mentioned series structure, the water inlet pipe 21 of the first water storage device 12 is connected to the water inlet main pipe 20, and the water outlet pipe 22 of the last water storage device 12 is connected to the water outlet main pipe 29, and the water inlet main pipe 20 is used to communicate with an external water inlet pipe, such as a running water pipe, and the main water outlet pipe 29 is used to lead to a water end, such as a hot water shower head.

The water heater can directly use each water storage device 12 to store the heat transfer medium without providing a special water storage tank.

When this pressurized solar water heater works, for example, as shown in Figure 2, the external heat transfer medium, such as a running water pipe, can be connected to the water inlet main pipe 20, and the water flow will flow from the first water storage type solar heat collecting tube connected in series. The water inlet pipe 21 of 1 flows into its water storage device 12, and the water flow rises in the water storage device 12, and then flows out from the water outlet pipe 22; it flows into the water storage device 12 of the second water storage type solar heat collector tube 1 through the connecting water pipe 25, Until the water storage device 12 of all the water storage type solar heat collector tubes 1 connected in series is full of water, the water flows out from the main water outlet pipe 29 at last; When exposed to sunlight, the heat of sunlight is absorbed by the light-absorbing layer of the heat collecting tube body 11 and transferred to the internal water storage device 12, which makes the water warm up, the density of high-temperature water becomes smaller, and flows upward in the water storage device 12, while the low temperature The water flows downward, and a temperature difference cycle is formed in the water storage device 12. As the illumination time increases, the water in each water storage type solar collector tube 1 can be heated to a higher temperature. When hot water needs to be used, the valve at the user end is opened, and under the tap water pressure, the water in the water storage device 12 is pressed out, and flows out from the main water outlet pipe 29 to reach the user end.

Since the water storage device 12 can operate under pressure, the water heater can transport hot water from a low place to a high place. Furthermore, the pressurized solar water heater does not cause liquid leakage due to damage to a certain heat collecting tube body 11, and the water heater can still be used continuously.

Similar to the above, preferably, the water storage type solar heat collection tube 1 adopted by the water heater may be provided with a sealing ring 14 between the water storage device 12 and the inner pipe; it may be that the water storage device 12 includes The water storage pipe body and the sealing plate 13, the water storage pipe body is a cup-shaped structure, and the open end of the water storage pipe body is tightly connected with the sealing plate 13; it may be that the water inlet pipe 21 leads to the inner cavity of the water storage device 12 At the bottom position, the outlet pipe 22 leads to the top position of the inner cavity of the water storage device 12 . The arrangement of the sealing plate 13 can be that each water storage pipe body is provided with a sealing plate 13 respectively, or the water storage pipe bodies of a plurality of water storage devices 12 share one sealing plate 13 .

In addition, in order to reduce the heat loss at the connecting water pipe 25 and the water outlet main pipe 29, the connecting water pipe 25 and the water outlet main pipe 29 may be wrapped with thermal insulation materials.

Or, it may also include a shell 3, the shell 3 is filled with thermal insulation material, and the thermal insulation material wraps the end of the heat collecting pipe body 11 where the water inlet main pipe 20, the connecting water pipe 25, the water outlet main pipe 29 and the sealing ring 14 are located; And the water inlet main pipe 20 and the water outlet main pipe 29 lead out from the shell 3 .

In the embodiment shown in Figure 2, the thermal insulation material 31 wraps the water inlet main pipe 20, the connecting water pipe 25 and the water outlet main pipe 29, and the end portion of the heat collecting pipe body 11 where the sealing ring 14 is located to prevent heat from leaking from these positions.

Claims (10)

1. Water-storage solar heat collecting tube, comprising a heat collecting tube body (11), said heat collecting tube body (11) comprising an inner tube and an outer tube, the inner tube is coated with a light-absorbing layer, and the space between the inner tube and the outer tube is vacuum or Filled with heat-insulating gas, it is characterized in that a water storage device (12) is arranged inside the inner tube, the water storage device (12) is a sealed structure with a cavity inside, the water storage device (12) It is made of hard thermally conductive material; the water storage device (12) is provided with a water inlet pipe (21) and a water outlet pipe (22), and one end of the water inlet pipe (21) and the water outlet pipe (22) respectively lead to the water storage The inner cavity of the device (12), the other end of the water inlet pipe (21) and the water outlet pipe (22) respectively lead to the outside of the water storage device (12) from the end of the water storage device (12) close to the opening of the inner pipe. 2. The water storage type solar collector tube as claimed in claim 1, characterized in that, the water storage device (12) comprises a water storage pipe body and a sealing plate (13), the water storage pipe body is a cup-shaped structure, and the water storage pipe body is a cup-shaped structure. The open end of the water pipe body is sealingly connected with the sealing plate (13). 3. The water storage type solar collector tube according to claim 1, characterized in that, the water inlet pipe (21) leads to the bottom position of the inner cavity of the water storage device (12), and the water outlet pipe (22) leads to To the top position of the inner cavity of the water storage device (12). 4. The water storage type solar heat collection tube according to claim 1, characterized in that a sealing ring (14) is arranged between the water storage device (12) and the inner tube. 5. A pressurized solar water heater comprising at least two water storage type solar heat collecting tubes (1), said water storage type solar heat collecting tubes (1) comprising a heat collecting tube body (11), said heat collecting tube body (11) comprising The inner tube and the outer tube, the inner tube is coated with a light-absorbing layer, and the space between the inner tube and the outer tube is vacuum or filled with heat-insulating gas. It is characterized in that a water storage device (12) is also arranged inside the inner tube, so that The water storage device (12) is a sealed structure with a cavity inside, and the water storage device (12) is made of a hard thermally conductive material; the water storage device (12) is provided with a water inlet pipe (21) and a water outlet pipe (22), one end of the water inlet pipe (21) and the water outlet pipe (22) leads to the inner cavity of the water storage device (12) respectively, and the other end of the water inlet pipe (21) and the water outlet pipe (22) connects from the water storage device respectively. (12) One end close to the opening of the inner pipe leads to the outside of the water storage device (12); the adjacent water storage type solar heat collector tube (1), its water storage device (12) communicates through the connecting water pipe (25) and forms a series structure , the water inlet pipe (21) of the first water storage device (12) in the series structure is connected with the water inlet main pipe (20), and the water outlet pipe (22) of the last water storage device (12) in the series structure is connected Water outlet main pipe (29) is arranged. 6. The pressurized solar water heater according to claim 5, characterized in that a sealing ring (14) is provided between the water storage device (12) and the inner pipe. 7. The pressurized solar water heater as claimed in claim 6, characterized in that, it also comprises a casing (3), and the inside of the casing (3) is filled with thermal insulation material, and the thermal insulation material wraps the main water inlet pipe (20), Connect the water pipe (25), the water outlet main pipe (29) and the end of the heat collecting pipe body (11) where the sealing ring (14) is located; and the water inlet main pipe (20) and the water outlet main pipe (29) are drawn from the shell (3). 8. The pressurized solar water heater according to claim 5, characterized in that, the connecting water pipe (25) and the main water outlet pipe (29) are wrapped with thermal insulation materials. 9. The pressurized solar water heater according to claim 5, wherein the water storage device (12) comprises a water storage pipe body and a sealing plate (13), the water storage pipe body is a cup-shaped structure, and the water storage pipe The opening end of the body is sealingly connected with the sealing plate (13). 10. The pressurized solar water heater according to claim 5, characterized in that, the water inlet pipe (21) leads to the bottom position of the inner cavity of the water storage device (12), and the water outlet pipe (22) leads to The top position of the inner cavity of the water storage device (12).