KR20240062780A - Solar collector with reverse circulation of water - Google Patents

Abstract

The present invention relates to a solar heat collection device that can greatly improve heat collection efficiency and hot water production by allowing water to circulate backwards and collect water, and ensure safety by automatically adjusting the pressure in the heat collector.
The present invention includes a heat collecting tube 11 in which upper and lower support caps 12 and 12' are respectively fixed to the upper and lower ends and provided at an angle, and is fixed to the lower support cap 12' and located in the inner center of the heat collecting tube 11. A pressure regulating pipe (13) is provided in the longitudinal direction through which air enters and exits the inside and outside of the collecting pipe (11), and is fixed to the lower support cap (12') on one side of the pressure regulating pipe (13) and extends the length of the collecting pipe (11). A water intake pipe (15) is provided inside the direction to allow cold water to be supplied into the collector pipe (11), and is fixed to be embedded in the lower support cap (12') on one side of the pressure control pipe (13) and collects the collector pipe (11). ) includes a water collection module (10) having a water discharge pipe (16) through which hot water is drained, and a water level detection sensor (14) provided on the upper inner peripheral surface of the collection pipe (11), and cold water is supplied to the water intake pipe (15). It is configured to include a cold water distribution pipe 20 that supplies cold water, and a hot water collection pipe 23 that collects hot water drained to the discharge pipe 16.

Description

Solar collector with reverse circulation of water}

The present invention relates to a solar heat collecting device, and more specifically, to a solar heat collecting device in which water is circulated backwards and collected, which has been improved to greatly improve heat collection efficiency and hot water production.

Like the prior art presented in the patent literature of the prior art literature, it is common for water flowing through a solar heat collection pipe to circulate in a zigzag manner through a plurality of water collection pipes to collect solar heat.

However, the above-described prior art involves the problem that the heat collection efficiency is not very high because the water circulates in a zigzag manner through a plurality of water collection pipes, so solar heat is received while the water is flowing.

KR 10-2328143 B1 2021.11.17

The purpose of the present invention is to provide an improved solar heat collection device that can greatly improve heat collection efficiency and hot water production by allowing water to be collected by circulating backwards.

Another object of the present invention is to provide a solar heat collection device that can ensure safety by automatically adjusting the pressure in the heat collector.

The present invention includes a heat collecting tube in which upper and lower support caps are fixed to the upper and lower ends respectively and provided at an angle, and a heat collecting tube that is fixed to the lower support cap and provided longitudinally at the center of the inside of the heat collecting tube to allow air inside and outside the heat collecting tube to enter and exit. A pressure regulating pipe and a water intake pipe fixed to the lower support cap on one side of the pressure regulating pipe and provided inside in the longitudinal direction of the collecting pipe to allow cold water to be supplied into the interior of the collecting pipe, and embedded in the lower supporting cap on one side of the pressure regulating pipe. It includes a water discharge pipe that is fixed and drains the hot water in the water collection pipe, a water collection module having a water level detection sensor provided on an upper inner peripheral surface of the water collection pipe, a cold water distribution pipe that supplies cold water to the water intake pipe, and a water discharge pipe to the discharge pipe. It is characterized in that it is comprised of a hot water collection pipe through which hot water to be drained is collected.

Another feature is that water is supplied through an intake pipe at the bottom of the collector pipe, and the heated water is configured to reverse in the direction in which the water was supplied and discharged through a discharge pipe at the bottom of the collector pipe.

An upper air layer is formed above the highest water level line formed by supplying cold water to the water level detection sensor of the collector pipe and filling it with water. The upper air layer is provided with the upper end of the pressure regulator located in the upper air layer, so that the internal air of the upper air layer and Another feature is that it is configured to communicate with external air.

The electromagnetic open/close valve of the hot water pipe of the hot water collection pipe is shielded by a control command from the control unit to supply water into the collector pipe, and the electromagnetic open/close valve of the cold water pipe connected to the cold water distribution pipe is shielded so that the water in the collector pipe is converted to solar heat. The water heating temperature signal detected by the temperature sensor in the hot water pipe is applied to the control unit, and the electronic opening/closing valve is opened according to a control command from the control control unit, so that the hot water in the collector pipe is discharged. Another feature is:

In the present invention, after water is supplied through the lower part of the collecting pipe and the water is heated, the hot water is discharged again through the lower part of the collecting pipe, so the water flowing in and out of the collecting pipe is circulated in the reverse direction instead of in one direction, resulting in the heating of the water. Efficiency is improved and hot water production is greatly increased.

In particular, the present invention is irradiated with solar heat while the water is trapped inside the collector pipe, so not only does it have the effect of being heated relatively more quickly than flowing water, but it also receives solar heat as the water circulates. Because it is heated more quickly than before, the production of high-temperature hot water is increased.

In addition, the present invention has the effect of quickly and smoothly supplying cold water and discharging hot water to the collector pipe because air can be automatically introduced or exhausted into the collector pipe through the pressure regulating pipe.

In addition, in the present invention, even if the water inside the collector tube is evaporated by solar heat, the steam rises to the air layer at the top and is discharged to the outside through the pressure control pipe, so the pressure inside the collector pipe does not increase, preventing damage and explosion of the collector tube. Not only does it have the effect of guaranteeing safety by completely eliminating risks, but it also provides the effect of greatly improving product reliability.

1 is an overall perspective view showing a solar heat collecting device according to the present invention;
Figure 2 is a longitudinal cross-sectional diagram showing the heat collection module according to the present invention;
Figure 3 is a plan cross-sectional view of the heat collection module of the present invention;
Figure 4 is an overall system diagram of the solar heat collecting device of the present invention.

The present invention will be described in more detail based on the attached preferred embodiment drawings as follows.

Referring to Figures 1 and 2, in the present invention, a plurality of elongated heat collecting modules (10) are installed at an angle on a module support (B).

The present invention can be roughly divided into a heat collecting tube 11 in which the upper and lower support caps 12 and 12' are respectively fixed to the upper and lower ends and provided at an angle, and a heat collecting tube 11 fixed to the lower support cap 12' and having a heat collecting tube. (11) A pressure regulator pipe (13) is provided in the longitudinal direction at the center of the interior through which air enters and exits the collector pipe (11), and the pressure regulator pipe (13) is fixed to the lower support cap (12') on one side and collects the collector pipe (11). A water intake pipe (15) is provided inside the heat pipe (11) in the longitudinal direction to supply cold water into the inside of the heat collection pipe (11), and the pressure control pipe (13) is fixed to be embedded in the lower support cap (12') on one side. It is provided with a water collection module (10) having a water discharge pipe (16) through which the hot water in the heat collection pipe (11) is drained, and a water level sensor (14) provided on the upper inner peripheral surface of the heat collection pipe (11).

In addition, it is configured to include a cold water distribution pipe 20 that supplies cold water to the water intake pipe 15, and a hot water collection pipe 23 that collects hot water drained to the discharge pipe 16.

As shown in FIG. 2, the heat collection module 10 has an elongated heat collector 11, and an upper support cap 12 and a lower support cap 12' are provided on the top and bottom of the heat collector 11, respectively. Each is configured to be fixed. The heat collecting tube 11 is preferably a transparent or translucent glass tube, and the upper and lower support caps 12 and 12' are preferably made of plastic.

The pressure regulating pipe 13, the lower end of which is supported by the lower support cap 12', is built into the center of the collector pipe 11. At this time, the lower part of the pressure regulator pipe (13) is exposed to the outside to allow external air to pass through, and the upper end is configured to be located at a relatively higher point than the water surface detection sensor (14) installed on the inner peripheral surface of the upper support cap (12). will be.

Referring to Figures 2 and 3, the pressure regulator pipe (13) is provided with an inlet pipe (15) and a discharge pipe (16) on both sides, respectively, so that water can enter the inside of the collection pipe (11) and then be discharged again. do.

The lower end of the water intake pipe (15) is fixed to the lower support cap (12') and the upper end is configured to be located at a relatively lower point than the upper end of the pressure control pipe (13), and the body of the discharge pipe (16) is attached to the lower support cap. It is configured to be built and fixed inside (12') and communicate with the inside of the collecting tube (11).

And, as shown in FIG. 2, the water intake pipe 15 is connected to communicate with the cold water distribution pipe 20 provided at the lower part, and the discharge pipe 16 is connected to communicate with the hot water collection pipe 23. Code 17 indicates a connection nipple.

A cold water pipe (20a) is connected to one side of the cold water distribution pipe (20), and an electronic open/close valve (21) is provided in the middle of the cold water pipe (20a). In addition, a pressure sensor 22 and an electronic opening/closing valve 21' are provided in the middle of the cold water pipe 20a connected to the other side of the cold water distribution pipe 20. In addition, the cold water distribution pipe 20 is configured to have a relatively larger diameter compared to the diameter of the cold water pipe 20a.

A temperature sensor 24 and an electronic open/close valve 21" are installed in the middle of the hot water pipe 23a, which is provided in communication with one side of the hot water collection pipe 23 connected to the water discharge pipe 16. Here, too, the temperature sensor 24 and the electronic open/close valve 21" are installed. It is desirable that the diameter of the water collection pipe 23 be relatively larger than the diameter of the hot water pipe 23a.

The upper support cap 12 of the heat collection module 10 is concealed and built into the upper case 25 provided on the upper side of the heat collection module 10 shown in FIG. 1, and the lower support cap of the heat collection module 10 (12'), the cold water distribution pipe 20, and the hot water collection pipe 23 are preferably embedded and supported in a concealed manner within the lower case 25' provided on the lower side of the heat collection module 10 shown in FIG. do.

Referring to FIG. 4, in the present invention, cold water is supplied to the cold water distribution pipe 20 by connecting the water supply and the cold water pipe 20a, and cold water is supplied with the electronic open/close valve 21 operated to be open. In addition, the electronic opening/closing valve 21 is controlled and operated by the control control unit 40, and since the control circuit of the control control unit 40 that controls this is already known, detailed drawings and descriptions will be omitted.

Therefore, since the present invention is configured to have a relatively larger diameter of the cold water distribution pipe 20 compared to the diameter of the cold water pipe 20a, the relative difference of the cold water distribution pipe 20 in the narrow diameter of the cold water pipe 20a When cold water flows to a large diameter, the flow rate is relatively fast due to the Venturi effect, and a certain pressure is generated in the empty space that is not yet filled with water in the cold water distribution pipe (20), so that it flows to one side within the cold water distribution pipe (20). As the water gradually fills up horizontally without being biased, cold water flows simultaneously into each water intake pipe 15 of the plurality of heat collection modules 10.

And, as shown in FIG. 2, the cold water flowing into the water intake pipe 15 flows out from the upper part of the collector pipe 11 and falls toward the bottom, so the water (W) gradually flows inside the collector pipe 11. It fills up as it fills up. Of course, at this time, cold water is supplied to the water intake pipe 15 with the electronic opening/closing valves 21' and 21" shielded by a control command from the control unit 40.

In addition, as described above, the upper end of the water intake pipe 15 is positioned to the upper end of the collector pipe 11 to ensure that cold water is supplied by reducing the pressure of the water (W) rising inside the collector pipe 11 as much as possible. This is to facilitate water supply through the pipe (15).

To facilitate understanding of the present invention, for example, when the upper end of the water intake pipe 15 is located below the water collection pipe 11, the pressure of the gradually rising water gradually increases and pressurizes the cold water coming out of the water intake pipe 15, thereby smoothly Water cannot be discharged easily, but in the present invention, the upper part of the water intake pipe (15) is configured to be located up to the upper end of the collector pipe (11), thereby reducing the pressure of the water that was first filled inside the collector pipe (11) as much as possible, thereby ensuring smooth operation. This is to ensure water supply.

Therefore, as cold water is supplied to the water intake pipe 15, the water (W) inside the collector pipe 11 gradually rises to the water level sensor 14, and the water level sensor 14 is connected to the control unit 40. When a detection signal is applied, the control unit 40 sends a control command to the electronic opening/closing valve 21 so that the electronic opening/closing valve 21 is in a shielded state. In this state, water (W) does not circulate and collects the water. It becomes trapped inside the heat pipe 11.

Therefore, since the water (W) is trapped inside the heat collector 11 and is irradiated with solar heat, it is not only heated relatively more quickly than flowing water, but also receives solar heat as the water circulates. Because it is heated more quickly than before, the production of high-temperature hot water increases.

On the other hand, since water (W) is trapped inside the collector pipe (11) and is irradiated with solar heat, the water (W) inside the collector pipe (11) may evaporate. In this case, as the vapor pressure gradually increases, There is a risk that the collector tube 11 may not be able to withstand the vapor pressure and some weak parts may be damaged, or in severe cases, the collector tube 11 made of glass may explode.

Therefore, the present invention is configured to form an upper air layer (11a) on the upper part of the highest water level rise line (S) formed by supplying cold water to the water level sensor (14) of the collector pipe (11) and filling it with water (W), It is configured so that the internal air and external air of the upper air layer 11a communicate.

Therefore, in the present invention, when the water (W) inside the collector pipe (11) is evaporated by solar heat, the steam rises to the upper air layer (11a) on the upper side, and the upper air layer (11a) is connected to the pressure control pipe (13). Because it is connected to the external atmospheric layer, the internal pressure of the collector pipe (11) does not increase as the steam is discharged to the outside through the pressure control pipe (13), thereby completely eliminating the risk of damage and explosion of the collector pipe (11). Safety is definitely guaranteed.

In addition, the present invention not only controls the internal pressure of the collector pipe (11) not to increase by the pressure control pipe (13), but also controls the pressure control pipe (13) when cold water is supplied through the water intake pipe (15). Since the air inside the collector pipe (11) is exhausted to the outside and cold water is introduced, cold water is supplied very quickly and well. Conversely, when water (hot water) is discharged through the discharge pipe (16), the outside air is Since the hot water flows into the upper part of the collector pipe (11) through the pressure regulator pipe (13), the hot water can be discharged very smoothly and quickly.

In addition, in the present invention, the temperature at which the water (W) is heated is detected by the temperature sensor 24 on one side of the hot water collection pipe 23 connected to the collector pipe (11). The detected temperature is measured by the control unit 40. When the temperature is applied to the hot water temperature preset in the control unit 40, the control unit 40 sends a control command signal to the electronic opening/closing valve (21") to open the electronic opening/closing valve (21"). , In this state, the hot water in the hot water collection pipe 23 is gradually drained into the hot water pipe 23a, and the heated water W (hot water) in the water collection pipe 11 is discharged through the discharge pipe 16. At this time, external air flows into the heat collector 11 through the pressure control pipe 13, so hot water is discharged very quickly and smoothly even without opening the electronic on-off valve 21.

Therefore, in the present invention, after water is supplied through the lower part of the collecting pipe 11 and the water is heated, the hot water is discharged again through the lower part of the collecting pipe 11, so that the water entering and leaving the collecting pipe 11 flows in one direction. Instead of circulating backwards, the heating efficiency of water (W) is improved and hot water production is greatly increased.

That is, in the present invention, water is supplied through the water intake pipe 15 at the bottom of the collector pipe 11, and the heated water is also turned backwards in the direction in which the water was supplied to the discharge pipe 16 at the bottom of the collector pipe 11. ) can be said to be the biggest feature in that it is structured to drain through.

Referring to Figure 4, the hot water discharged from the collector pipe 11 is stored in the hot water storage tank 42 through the auxiliary tank 41, and the circulation pumps 43 and 43' are operated as needed to maintain home life. It is used as hot water or supplied through the heating pipe 44 to heat the room. In addition, when there is little or no hot water inside the auxiliary tank 41, cold water is supplied through the cold water pipe 20a and the hot water created by heating the heater 45 is supplied to the hot water storage tank 42 to provide household hot water or heating. It can be used as hot water. At this time, when the hot water temperature preset by the temperature sensor valve 48 is reached, the temperature sensor valve 48 is opened and hot water is supplied to the hot water storage tank 42, and when the preset hot water temperature is lower than the temperature sensor valve 48, the temperature sensor valve 48 is opened. is shielded. The night time sensor valve (46) is a valve that allows water from the heating pipe (44) to be supplied to the auxiliary tank (41) at night and to the collector pipe (11) during the day. The backflow prevention valve 47 functions to prevent cold water from flowing back into the heating pipe 44.

The electronic opening/closing valve (21) is controlled to open and close by the control unit (40) so that it is opened and closed separately during the day and at night. In addition, when all the hot water inside the collector pipe 11 is discharged, the internal pressure drops, and the pressure sensor 22 detects that the cold water pressure (water pressure) in the cold water pipe 20a also drops, and sends a detection signal to the control unit 40. When applied, the control unit 40 sends a control command to the electronic opening/closing valve 21 to open it and supply cold water to the collector pipe 11. Since the electronic open/close valves (21, 21', 21"), night time sensor valve (46), backflow prevention valve (47), and temperature sensor valve (48) are already known valves, detailed drawings and descriptions will be omitted. And All valves except the backflow prevention valve 47 are opened and closed by control commands from the control unit 40.

And since the overall heating system as shown in FIG. 4 may be changed into various forms depending on the case, the present invention is not necessarily limited to what is shown and described, and may be modified in various ways by those skilled in the art to which the present invention pertains. Since it can be implemented in a modified form, it is obvious that it should be broadly protected as long as it does not significantly deviate from the scope of the claims.

10: Collection module 11: Collection tube
11a: Upper air layer 12,12': Upper and lower supports
13: Pressure regulator 14: Water level sensor
15: intake pipe 16: discharge pipe
17: Connection nipple 20: Cold water distribution pipe
20a: Cold water piping 21, 21', 21": Electronic open/close valve
22: Pressure sensor 23: Hot water collection pipe
23a: Hot water pipe 24: Temperature detection sensor
25, 25': upper, lower case 40: control unit
41: Auxiliary tank 42: Hot water storage tank
43,43': Circulation pump 44: Heating pipe
45: Heater 46: Night time sensor valve
47: Backflow prevention valve 48: Temperature sensor valve
S: Highest water level rise line B: Module support
W:water

Claims (4)

A heat collecting tube (11) in which upper and lower support caps (12, 12') are fixed to the upper and lower ends, respectively, and are provided at an angle;
A pressure control pipe (13) fixed to the lower support cap (12') and provided longitudinally at the center of the inside of the collector pipe (11) through which air enters and exits the collector pipe (11).
An inlet pipe (15) fixed to the lower support cap (12') on one side of the pressure regulating pipe (13) and provided inside the longitudinal direction of the collecting pipe (11) to allow cold water to be supplied into the collecting pipe (11);
A drain pipe (16) fixed to be embedded in the lower support cap (12') on one side of the pressure control pipe (13) and through which the hot water in the collector pipe (11) is drained;
It includes a heat collection module (10) having a water level detection sensor (14) provided on the upper inner peripheral surface of the heat collector (11);
a cold water distribution pipe (20) that supplies cold water to the water intake pipe (15);
A solar heat collecting device in which water circulates backwards, comprising a hot water collection pipe (23) through which hot water drained into the discharge pipe (16) is collected.
According to claim 1,
Water is supplied through the inlet pipe 15 at the bottom of the collector pipe 11, and the heated water also returns in the direction in which the water was supplied and is discharged through the discharge pipe 16 at the bottom of the collector pipe 11. A solar heat collection device in which water circulates backwards, characterized in that it is configured as possible.
According to claim 1,
An upper air layer (11a) is formed on the upper part of the highest water level rise line (S) formed by supplying cold water to the water level sensor (14) of the collector pipe (11) and filling it with water (W), and the upper air layer ( A solar heat collecting device in which water circulates backwards, characterized in that the upper part of the pressure regulator pipe (13) is positioned in 11a) so that the internal air of the upper air layer (11a) communicates with the external air.
According to claim 1,
The electronic opening/closing valve (21") of the hot water pipe (23a) of the hot water collection pipe (23) is shielded by a control command from the control unit (40) to supply water into the collection pipe (11), and the cold water distribution pipe (20) ) is shielded to the electromagnetic opening/closing valve (21) of the cold water pipe (20a) connected to the water collector (11) to heat the water (W) in the solar collector, and to the temperature sensor (24) in the hot water pipe (23a). The water (W) heating temperature signal detected by the sensor is applied to the control unit 40, and the electronic opening/closing valve 21" is opened according to a control command from the control control unit 40 so that the hot water in the collector pipe 11 is discharged. A solar heat collection device in which water is circulated backwards.