KR20100110600A - A solar water heating system - Google Patents

Abstract

PURPOSE: A water heating system using solar energy is provided to safely protect a water heating system in case of overheat, power outage, or system failure, since pressure is removed due to a thermal medium storage/expansion tank by the operation of an automatic controller. CONSTITUTION: A water heating system using solar energy comprises a thermal medium storage/expansion tank(3). The thermal medium storage/expansion tank is installed between a heat collector(1) and a heat exchanger(4) to form a buffer area. In case of overheat, power outage, or failure of a hot water system, the thermal medium inside the heat collector flows into the thermal medium storage/expansion tank.

Description

Hot water system using solar heat {A solar water heating system}

The present invention is installed by the operation of the controller in the event of overheating, power failure, and failure of the hot water system after installing a buffer area on one side of a hot water system having a sealed structure connecting a heat exchanger, an expansion tank, a heat medium circulation pump, and a hot water circulation pump. The present invention relates to a hot water system using solar heat that allows the expansion and pressure caused by overheating to be canceled by the buffer area so that the hot water system can be safely protected in case of overheating, power failure, or system failure.

Attempts have long been made to use solar energy as a means to solve the energy shortage problem.

Conventionally, a solar heating and heating device using solar heat has been developed as an example of a heating and heating device using solar energy, and briefly explaining the principle of using the solar heat, the heating device is installed to use solar heat while being installed outside the building. The heat medium is transferred to a heat exchanger, and heat is stored in hot water of the heat storage tank through heat exchange with water in the heat exchanger, so that it can be used for hot water or heating as necessary.

In the conventional solar hot water system related to this technology, as shown in FIG. 1, the heat medium heated in the collector 1 arranged to collect solar heat on the outside of the building is a heat collector high temperature part temperature sensor 9 and a heat storage cryogenic part temperature sensor. 11) the heat medium circulation pump 5 is automatically operated according to the detected temperature difference to transfer heat generated in the heat collector 1 to the heat exchanger 4, and the hot water of the heat storage tank 2 in the heat exchanger 4 It consists of a configuration that stores heat through and heat exchange.

At this time, the detection sensor and the pump is connected to the automatic controller 13, and when the solar heat is insufficient is installed to receive heat through the auxiliary boiler (14).

However, the solar hot water system as described above is a closed-loop closed circuit, in which the operation of the heat medium circulation pump 5 is stopped in case of power failure or system failure, and the heat medium in the collector 1 is suddenly overheated to change from liquid phase to gaseous phase. Inflate, and paralyze the function of the hermetic expansion tank (3) made of a closed type by the expansion as described above, and leak or rupture of the collector (1) and pipe connection in series, failure of various sensors, pump failure, etc. The result is a paralyze that paralyzes all the functionality of the system.

In addition, the conventional system has to repair all the heat collector (1), heat medium piping, heat exchanger (4), pumps and heat exchanger peripherals when such a problem occurs, the work process is complicated and requires a lot of time, excessive repair cost There is a problem that occurs.

An object of the present invention for improving the conventional problems as described above, the overheating, power failure, system failure by offsetting the pressure by the heat medium storage and expansion tank by the operation of the controller in the event of overheating, power failure, failure of the solar hot water system The hot water system can be safely protected at the time, and the hot water system can be compactly constructed to make the construction very easy, to minimize the facility time while minimizing the facility space, and to simplify the maintenance. It is to provide a hot water system using solar heat to enable.

The present invention provides a heat collector installed to absorb heat from the sun, a heat storage tank for storing heat generated from the heat collector through heat exchange, and solar heat installed to use the heat stored in the heat storage tank for hot water or heating. In the hot water system used,

Provided is a hot water system using solar heat so that the thermal medium in the collector is automatically drained down to the buffer area in the event of overheating, power failure, or failure of the hot water system, so that over-expansion of the heat medium is not generated in the collecting circuit.

As described above, according to the present invention, in the event of overheating, power failure, or failure of the hot water system, the pressure is compensated by the thermal medium storage and expansion tank by the operation of the automatic controller to safely protect the solar hot water system in the event of overheating, power failure, or system failure. The compact construction of the hot water system makes the construction very easy, minimizing the installation space, minimizing the installation time, and simplifying the maintenance.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 are flow charts illustrating a hot water system using solar heat according to the present invention, respectively, and FIGS. 4 and 5 are exploded and cross-sectional views illustrating a check valve mounted in the hot water system according to the present invention, respectively. 6 is a cross-sectional view showing a check valve mounted on a hot water system according to another embodiment of the present invention.

The present invention uses a heat collector (1) installed to absorb heat from the sun, a heat storage tank (2) for storing the heat generated in the heat collector 1 through heat exchange, the heat stored in the heat storage tank (2) for hot water or heating It is made of a connection structure of the plumbing facility (not shown) that is installed to.

And, the solar heat collection, the heat medium circulation pump (5) is operated in accordance with the temperature difference between the temperature of the heat collector upper temperature sensor (9) and the heat storage tank low temperature part temperature sensor (10) to pass the heat medium of the heat medium storage tank to the collector (1). It is installed to recover the heat of the heat collecting plate (not shown) in the collector and supply it to the heat exchanger (4).

In addition, the heat exchanger (4) is installed so that the low temperature water of the heat storage tank (2) is supplied to the heat exchanger (4) through a hot water circulation pump (6) installed on one side thereof to heat exchange the high temperature solar heat.

Subsequently, the heat medium whose heat exchange is completed by the heat exchanger 4 is installed to be supplied to the heat collector 1 in a liquid state through the heat medium storage and expansion tank 3 which performs the role of the buffer region, and the heat medium storage and A check valve 7 is provided between the expansion tank 3 and the collector 1.

At this time, the check valve (7), while performing the role of the check valve is formed with a back flow hole (O) for performing the role of the orifice to drain down the heat medium when the collector 1 overheats.

In addition, the check valve (7), the lower case (7-4) having a tapered surface on the inner diameter side, the upper case (7-1) having a through hole while being coupled to the lower case (7-4) and the It consists of an assembling structure of the orifice block 7-3 having a slope corresponding to the tapered surface and connected via a spring 7-2.

On the other hand, the check valve 7 is made of a configuration in which the backflow prevention plate (7-7) having a backflow hole (0) is connected to the hinge (7-8) and supported by the support jaw (7-9).

On the other hand, between the rear end and the front end of the check valve 7 or the check valve so that the heat medium is recovered to the heat medium storage and expansion tank 3 without passing through one side of the check valve 7, that is, the check valve 7. It consists of a configuration in which a bypass valve (8) connecting between the rear end of (7) and the front end of the heat medium circulation pump (5) is installed.

The operation of the present invention having the above configuration will be described.

2 to 6, the present invention is a heat medium storage and expansion tank (3) to perform the role of the buffer medium in the heat medium in the collector (1) during overheating, power failure, failure of the solar hot water system having a closed structure Automatic drain down, so that the pressure in the closed system during over-expansion is absorbed in the heat medium storage and expansion tank (3).

In the operation of the solar hot water system as described above, the heat collecting plate in the collector 1 is heated by solar heat so that the temperature difference between the heat collector upper temperature sensor 9 and the heat storage cryogenic temperature sensor 10 is input to the automatic controller 13 in advance. When the set temperature is higher than the set temperature, the heat medium circulation pump 5 and the hot water circulation pump 6 connected to the automatic controller are automatically operated.

At this time, the heat medium circulation pump 5 sends the heat medium stored in the heat medium storage and expansion tank 3 to the heat collector 1, and then transfers the heat medium to the heat exchanger 4, wherein the hot water circulation pump 6 is a heat storage tank ( The water of 2) is sent to the heat exchanger (4).

And, the detailed operation of the heat medium circulation circuit as described above, first generates an operation signal of the thermo-body circulation pump 5 in accordance with the temperature difference between the temperature collector upper part temperature sensor 9 and the heat storage tank low temperature part temperature sensor 10.

Subsequently, the check valve 7 mounted at the front end of the heat medium circulation pump 5 opens to transfer the heat medium to the heat collector 1 to absorb solar heat from the heat collecting plate of the heat collector to heat the heat medium.

In addition, the heat medium absorbing solar heat from the heat collector 1 is transferred to the heat exchanger 4 to perform heat exchange to heat water in the heat storage tank 2, and the heat medium having completed heat exchange through the heat exchanger 4 is It is transferred to the heat medium storage and expansion tank (3).

At this time, the air filled in the heat medium circulation circuit (AA) (BB) (CC) (DD) is pushed by the heat medium as the heat medium is circulated to collect into the upper space of the heat medium storage and expansion tank (3), the collector ( When the temperature difference between 1) and the heat storage tank 2 is equal to or higher than the set temperature, the above operation is repeatedly performed.

On the other hand, the operation of the hot water circulating pump (6) operating simultaneously with the heat medium circulation pump (5), first, the heat collector upper temperature sensor (9) according to the temperature difference of the heat storage tank low temperature part temperature sensor (10). In operation, the cold water of the heat storage tank 2 is sucked and transferred to the heat exchanger 4.

In addition, the heat exchanger 4 absorbs heat from the heat medium and transfers the heat to the heat storage tank 2, and if the temperature difference between the heat collector 1 and the heat storage tank 2 is equal to or higher than a set temperature, the above operation is repeatedly performed. .

On the other hand, due to the insufficient amount of insolation, the temperature difference between the heat collector high temperature part temperature sensor 9 and the heat storage cryogenic part temperature sensor 10 becomes less than or equal to the set temperature, or the heating medium circulation pump 5 by the control signal of the automatic controller 13 when overheating. And the operation of the hot water circulation pump 6 is automatically stopped.

At this time, in the heat medium circulation circuit AA (BB) CC, the check valve 7 is closed at the same time as the operation of the heat circulation pump 5 is stopped, and the reverse flow of the orifice function drilled through the sieve valve 7 is performed. Through the ball O, the heat medium in the collector 1 is gradually recovered to the heat medium storage and expansion tank 3.

That is, while the heat medium in the collector 1 is gradually recovered to the heat medium storage and expansion tank 3, the air filled in the heat medium storage and expansion tank 3 performs the role of preventing backflow and air circulation in the heat medium circulation circuit. The heat medium and the air separation function check valve 12 of the heat medium circulation circuit (DD) are transferred to the heat collector through the other heat circulation circuit (BB), and the heat collector is filled with air so that the heat collector (1) is caused by overheating of the heat medium. And breakage of the thermal medium circulation circuit AA (BB) (CC) (DD).

In particular, in the event of a power failure, the bypass valve 8 is automatically opened so that the heat medium in the collector can be recovered to the heat medium storage and expansion tank 3 more quickly to maintain the safety of the system.

At this time, the bypass valve (8) is connected between the front end and the rear end of the check valve (7), so that the heat medium recovered from the collector 1 does not have to pass through the check valve (7), the heat medium is stored more quickly And to the expansion tank 3.

In addition, the bypass valve 8 is configured to connect the rear end of the check valve 7 and the front end of the heat medium circulation pump 5 so that the heat medium recovered from the collector 1 does not have to pass through the check valve 7. The heat medium does not pass through the heat medium circulation pump (5) while preventing the heat medium to be recovered to the heat medium storage and expansion tank (3) to prevent damage to the heat medium circulation pump (5).

When the power failure state is restored, the bypass valve 8 is locked again, and the drain down of the heat medium is performed only through the check valve 7.

Subsequently, when the load of the operation of the heat medium circulation pump 5 is stopped, the above operation is repeated. The same operation is performed even when there is no insolation due to snow or boiling.

On the other hand, when the operation of the hot water circulation pump 6, which stops the operation simultaneously with the heat medium circulation pump 5, stops the circulation of water in the heat storage tank 2, and the operation of the hot water circulation pump 6 is stopped as described above. The operation of the warm water circulating pump 6 is stopped when there is no solar radiation due to the stopping condition, that is, snow or boiling.

In addition, the check valve (7), the lower case (7-4) having a tapered surface on the inner diameter side, the upper case (7-1) having a through hole while being coupled to the lower case (7-4) and the Consists of the assembly structure of the orifice block (7-3) connected via a spring (7-2) while having an inclined surface corresponding to the tapered surface so that the flow from the bottom to the top can be fully opened so that there is no problem of purifying the heat medium And the flow from the top to the bottom is gradually drained down only through the backflow hole.

Through the above configuration, the heat medium present in the collector 1 during overheating or non-operation can be recovered to the heat medium storage and expansion tank 3 to prevent damage to the component due to overheating.

On the other hand, inevitably, when an abnormal overpressure occurs in the heat medium circuit, the safety valve 15 mounted on the heat medium storage and expansion tank 3 is opened to discharge only the air filled in the heat medium storage and expansion tank 3. To keep the safety.

1 is a flowchart illustrating a conventional solar hot water system.

2 and 3 are a flow chart illustrating a hot water system using solar heat according to the present invention, respectively.

Figure 4 and Figure 5 is an exploded view and a coupled state sectional view showing a check valve mounted to the hot water system according to the present invention, respectively.

Figure 6 is a cross-sectional view showing a check valve mounted to the hot water system according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

1 ... heat collector 2 ... heat storage tank

3 ... heat storage and expansion tank 4 ... heat exchanger

5.Hyper circulation pump 6 ... Hot water circulation pump

7 .... check valve 8 ... bypass valve

9 ... Cooler temperature sensor 10 ... Cooler temperature sensor

11 ... Thermal temperature sensor for heat storage tank 12 ... Check valve for heat medium and air separation function

13 ... Automatic controller 14 ... Secondary boiler

15 ... Safety valve

Claims (7)

In a heat collector installed to absorb heat from the sun, a heat storage tank for storing the heat generated from the heat collector through heat exchange of the heat exchanger, a hot water system using solar heat is installed to use the heat stored in the heat storage tank for hot water or heating, Between the collector 1 and the heat exchanger 4, a heat medium storage and expansion tank 3, which is a buffer area, is provided so that the heat medium in the heat collector is transferred to the heat medium storage and expansion tank 3 in the event of overheating, power failure, or failure of the hot water system. Hot water system using solar heat, characterized in that flowing The hot water system using solar heat according to claim 1, wherein a check valve having an orifice function is provided between the collector and the heat medium storage and expansion tank so that the heat medium in the collector flows to the expansion tank. The heat medium storage and expansion tank (3) is provided with a heat medium and an air separation check valve (12) at one side thereof, and when the heat medium circulation pump (5) operates, air in the collector is stored and expanded. It serves as a passage to induce to collect in the upper portion of the tank (3) and to perform the passage function to transfer the air stored in the heating medium storage and the upper portion of the expansion tank (3) to the collector when the heating medium circulation pump (5) is stopped. Hot water system using solar heat. The check valve of claim 2, wherein the check valve is formed with a backflow pipe that serves as an orifice, a lower case having a tapered surface on an inner diameter side, an upper case and a tapered surface having a through hole coupled to the lower case. An orifice block is assembled between the lower case and the upper case via a spring while having a corresponding inclined surface, so that the heating medium moves downward through the backflow pipe in the event of overheating, power failure, or failure of the hot water system. Hot water system using The check valve (7) according to claim 2, wherein the check valve (7) is configured such that a backflow prevention plate (7-7) having a backflow hole (0) is connected to the hinge (7-8) and supported by the support jaw (7-9). Hot water system using solar heat, characterized in that the heating medium is downward through the backflow pipe in the event of overheating, power failure, or failure of the hot water system 3. The bypass valve (8) according to claim 2, wherein a bypass valve (8) is provided at one side of the check valve (7) to connect the front and rear ends of the check valve (7) so that the heat medium of the collector does not pass through the check valve (7). Hot water system using solar heat, characterized in that heat medium storage and recovery to the expansion tank (3) 3. The bypass valve (8) according to claim 2, wherein a bypass valve (8) for connecting the rear end of the check valve (7) and the front end of the heat medium circulation pump (5) is provided at one side of the check valve (7). ) And the hot water system using solar heat, characterized in that it is recovered to the heat medium storage and expansion tank (3) without passing through the heat medium circulation pump (5).

Images