KR20030053189A - Hot water and floor heating device of geothermal cooling and heating system - Google Patents

Abstract

PURPOSE: A hot water generating and floor heating apparatus is provided to achieve maximized efficiency of energy utilization by generating hot water without using an additional heating source. CONSTITUTION: A cooling operation is performed in that the first refrigerant compressed by a compressor(1) is condensed in the second heat exchanger unit(5) by using the second refrigerant circulating through a geothermal heat exchange line(6) buried into the ground, and heat-exchanged in the first heat exchanger unit(3) while passing through an expansion valve(4) and the first heat exchanger unit. A heating operation is performed in that the first refrigerant compressed by the compressor is heat-exchanged in the first heat exchanger unit, and the first refrigerant whose temperature is lowered by the heat exchange operation in the first heat exchanger is heat-exchanged with the second refrigerant in the second heat exchanger unit and re-supplied to the compressor. A hot water heat exchanger unit(10) raises the temperature of the water flowing through a hot water circulation line(11), by using the high temperature of the first refrigerant flowing through a refrigerant circulation line(8) arranged in the outlet side of the compressor.

Description

Hot water and floor heating device of geothermal cooling and heating system

The present invention relates to hot water and heating device of the geothermal heating and cooling system, and in particular to enable the generation of hot water without using a separate heating source geothermal heat to maximize the energy utilization efficiency while simultaneously implementing hot water and floor heating The present invention relates to hot water and heating devices for heating and cooling systems.

Geothermal heating and cooling system is a system proposed to realize the cooling and heating of the room while improving the energy use efficiency using geothermal.

1 and 2 show a conventional geothermal heating and cooling system,

Compressor (1) for compressing the first refrigerant for cooling and heating to a state of high temperature, high pressure and discharge it through refrigerant circulation line (8), and geothermal heat exchange line (6) buried in the ground of a certain depth during the cooling operation The high temperature and high pressure first refrigerant discharged from the compressor 1 is condensed in a liquid state and supplied to the expansion valve 4 by using the low temperature of the second refrigerant circulating inside. And a second heat exchanger 5 for supplying the first refrigerant in a low temperature state, which has passed through the expansion valve 4 and the expansion valve 4, to the compressor 1 by raising a predetermined temperature by using the high temperature of the second refrigerant; An expansion valve 4 installed between the 3) and the second heat exchanger 5 to lower the pressure of the first refrigerant passing therethrough, and a low temperature and low pressure first supplied through the expansion valve 4 during the cooling operation. Heat exchange with the air forcedly blown by the fan 9 by using the refrigerant to cool the room, and during the heating operation The first heat exchange unit 3 to heat the room using the first refrigerant of the high temperature state supplied from the compressor 1, and the first refrigerant discharged from the compressor 1 during the cooling operation second heat exchange unit ( 5) the first refrigerant having passed through the first heat exchange part 3 is again supplied to the compressor 1, and during the heating operation, the first refrigerant discharged from the compressor 1 is transferred to the first heat exchange part ( 3) and a reversing valve 2 for resupplying the first refrigerant, which has passed through the second heat exchange part 5, to the compressor 1 again.

On the geothermal heat exchange line 6, a circulation pump 7 for smooth circulation of the second refrigerant filled in the geothermal heat exchange line 6 is provided.

Referring to the operation of the conventional geothermal heating and cooling system configured as described above are as follows.

Since the operation of the conventional geothermal heating and cooling system is largely divided into a cooling cycle and a heating cycle will be described for each operation.

◆ Cooling Cycle ◆

In the cooling cycle, the refrigerant flows as shown in FIG. 1.

When the geothermal air conditioning system is switched to the cooling mode, the reversing valve 2 interconnects the output end of the compressor 1 and the second heat exchange part 5, and the output end of the first heat exchange part 3 and the compressor 1. The first refrigerant circulated through the refrigerant circulation line 8, which is switched to interconnect the input terminals of the compressors, is in the order of the compressor 1, the second heat exchanger 5, the expansion valve 4, and the first heat exchanger 3. Allow it to circulate.

First, the compressor 1 is driven to compress the first refrigerant in a state of high temperature and high pressure to supply it to the second heat exchange part 5 through the reversing valve 2, and the second heat exchange part 5 has a predetermined depth. The high temperature and high pressure refrigerant supplied from the compressor 1 is cooled by condensing into a liquid state using a second low temperature refrigerant circulating inside the geothermal heat exchange line 6 buried in the ground and expanding the expansion valve (4). ).

That is, the second heat exchange part 5 circulates the refrigerant by using the low temperature of the second refrigerant circulating the geothermal heat exchange line 6 buried at a constant depth in the ground during cooling operation to maintain a state lower than the atmospheric temperature. It acts as a condenser to cool and liquefy the first refrigerant in the high temperature and high pressure state passing through the line (8), thus improving energy use efficiency by using geothermal heat that is kept below the atmospheric temperature in summer. Will be.

The expansion valve 4 expands the liquid first refrigerant supplied from the second heat exchanger 5, converts it into a gas state of low temperature and low pressure, and supplies the same to the first heat exchanger 3. The unit 3 heat-exchanges the air forced by the fan 9 and the first refrigerant to supply cool wind to the room to realize a cooling operation, and then reversing the first refrigerant that has risen in temperature during the heat exchange process. (2) is re-supplied to the compressor (1) so that the cooling operation is performed while the first refrigerant is continuously circulated.

◆ heating cycle ◆

In the heating operation, the flow of the first refrigerant is performed as shown in FIG. 2.

When the geothermal air conditioning system is switched to the heating mode, the reversing valve 2 interconnects the output end of the compressor 1 and the first heat exchanger 3, and the output end of the second heat exchanger 5 and the compressor 1. The first refrigerant is switched to interconnect the input terminals of the refrigerant circulation line (8) in the order of the compressor (1) → the first heat exchange unit (3) → expansion valve (4) → the second heat exchange unit (5) Allow it to circulate.

First, the compressor 1 is driven to compress the first refrigerant to a state of high temperature and high pressure and supply the first refrigerant to the first heat exchanger 3 through the reversing valve 2, and the first heat exchanger 3 is a fan. (9) heat exchanges the cold air and the first refrigerant forced by the air to supply the hot wind to the room so that the heating operation is implemented, and the first refrigerant condensed in the liquid state while the temperature decreases during the heat exchange process is expanded valve ( 4) to supply.

The expansion valve 4 expands the first refrigerant in a liquid state, converts the gas into a gaseous state of low temperature and low pressure, and supplies the same to the second heat exchange part 5, and the second heat exchange part 5 is disposed in the ground at a predetermined depth. The low-temperature, low-pressure first refrigerant supplied from the expansion valve 4 is heated by using a second refrigerant in a room temperature state (higher than a temperature in winter) that circulates in the embedded geothermal exchange line 6. It raises and refeeds it to the compressor 1 through the reversing valve 2 again.

That is, the second heat exchange part 5 circulates through the geothermal heat exchange line 6 buried at a certain depth in the ground during the heating operation, using the high temperature of the second refrigerant to maintain a state higher than the temperature of the winter atmosphere. It acts as an evaporator to evaporate the low temperature and low pressure state of the first refrigerant passing through the circulation line 8 by evaporating the temperature, and thus to the compressor 1 by using geothermal heat that is maintained above the atmospheric temperature in winter. As the temperature of the first refrigerant to be supplied is raised to a certain value, the operating time of the compressor 1 can be shortened by that amount, thereby improving energy use efficiency.

As described above, the conventional geothermal heating and cooling system maintains a state lower than the atmospheric temperature in summer, and uses a geothermal heat in the winter to maintain the state higher than the atmospheric temperature. By raising or lowering the temperature effectively, it has the effect of significantly improving the energy use efficiency compared to the existing heating and cooling system.

However, the conventional geothermal heating and cooling system does not have a device for generating hot water, so in order to use hot water in a general home, there is a problem that a separate hot water device using electricity or gas has to be installed. Because of the installation of a separate hot water device in the installation place, the economic burden on the user was increased, there was a problem that must consume a double energy.

Accordingly, the present invention for solving the above problems is to generate hot water by using the refrigerant temperature of the high temperature, high pressure discharged from the compressor during the cooling and heating operation in the geothermal air-conditioning system to improve the energy utilization efficiency using geothermal heat, the generation The stored hot water is stored in a hot water tank for convenient use by the user, so that hot water can be generated without using a separate heating source, thereby maximizing energy utilization efficiency while simultaneously implementing hot water and floor heating. An object of the present invention is to provide hot water and a heating system for a geothermal heating and cooling system.

The present invention for achieving the above object

During the cooling operation, the first refrigerant compressed to high temperature and high pressure in the compressor is condensed in the second heat exchanger using a second refrigerant circulating inside the geothermal heat exchange line buried in the ground of a predetermined depth, and then the expansion valve and the first heat exchanger are used. Cooling is achieved by the heat exchange operation in the first heat exchange unit while passing through the unit,

During the heating operation, the first refrigerant is cooled by the heat exchange operation in the first heat exchange unit by using the first refrigerant compressed to high temperature and high pressure in the compressor, and then the first refrigerant that has dropped in temperature by the heat exchange operation in the first heat exchanger is second to the second refrigerant. In the geothermal air-conditioning and heating system configured to be re-supplied to the compressor in a state of constant temperature rise by heat-exchanging with the second refrigerant holding a constant temperature by geothermal heat in the heat exchanger,

It characterized in that the hot water heat exchanger for increasing the temperature of the water moving through the hot water circulation line by using the high temperature of the first refrigerant moving through the refrigerant circulation line in the output terminal of the compressor.

Then, one side of the hot water circulation line is connected to the water supply side of the hot water tank, and the other side is connected to the inlet side of the hot water tank, and a hot water circulation pump for smooth circulation of hot water is installed on the hot water circulation line,

The hot water heat exchanger is characterized in that the water in the hot water circulation line is increased in temperature by the heat radiated from the refrigerant circulation line by winding the refrigerant circulation line and the hot water circulation line alternately a predetermined number of times.

1 is a view showing a cooling cycle of the conventional geothermal heating and cooling system.

2 is a view showing a heating cycle of a conventional geothermal heating and cooling system.

Figure 3 is a view showing a cooling cycle of the geothermal heating system to which the hot water device of the present invention is applied.

Figure 4 is a view showing the heating cycle of the geothermal heating system to which the hot water device of the present invention is applied.

5 is a view showing a connection relationship between the hot water circulation line and the hot water tank constituting the hot water device of the present invention.

※ Explanation of code for main part of drawing

1: compressor, 2: reversing valve,

3: first heat exchanger, 4: expansion valve,

5: second heat exchanger, 6: geothermal heat exchange line,

7: circulation pump, 8: refrigerant circulation line,

10: hot water heat exchanger, 11: hot water circulation line,

12: hot water circulation pump, 13: hot water tank

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, FIGS. 3 to 5.

In the description of the present invention, the same components as in the prior art will be denoted by the same reference numerals to avoid redundant description.

The greatest feature of the present invention is that the hot water heat exchanger 10 is configured to generate hot water at the discharge end of the compressor 1 which discharges the first refrigerant in a high temperature and high pressure state at all times during the cooling operation or the heating operation.

That is, the compressor 1 compresses the first refrigerant to a high temperature and a high pressure state as shown in FIG. 3 during the cooling operation, and discharges the first refrigerant to the second heat exchange part 5 through the reversing valve 2, and heating. In operation, as shown in FIG. 4, the first refrigerant is compressed to a state of high temperature and high pressure and discharged to the first heat exchange unit 3 through the reversing valve 2, which is conventionally discharged from the compressor 1. There was a problem in that the use of the first refrigerant only in the heating and cooling operation to effectively use the heat energy emitted from the first refrigerant, in the present invention, high temperature, high pressure discharged from the compressor (1) in order to effectively use the high temperature heat energy It is to install a hot water heat exchanger 10 for generating hot water using the first refrigerant of the.

The hot water heat exchanger 10 wound the refrigerant circulation line 8 located at the output end of the compressor 1 several times, and the hot water circulation line 11 in which the hot water is circulated between the refrigerant circulation lines 8 is wound. The temperature of the water passing through the hot water circulation line 11 is increased by using the heat emitted from the refrigerant circulation line 8 by the high temperature first refrigerant passing through the refrigerant circulation line 8.

In other words, the first refrigerant of the high temperature state discharged from the compressor 1 by winding the hot water circulation line 11 and the refrigerant circulation line 8 in a state where the hot water circulation line 11 and the refrigerant circulation line 8 are in close contact with each other is wound a predetermined number of times. The hot water is generated by heating the water passing through the hot water circulation line 11 by using the heat dissipated in the process of passing through the refrigerant circulation line 8 wound several times.

On the other hand, the hot water circulation line 11 is connected to the hot water tank 13 for storing a certain amount of hot water as shown in Figure 5 so that the temperature rise water is stored in the hot water tank 13, the hot water circulation line One side of the (11) is connected to the water supply side of the hot water tank 13, the other side is connected to the inlet side of the hot water tank 13, the hot water circulation pump for smooth circulation of hot water on the hot water circulation line (11) 12) Install.

Therefore, when water is supplied to the hot water tank 13, the water is circulated through the hot water circulation line 11, discharged from the compressor 1, and dissipated from the high temperature first refrigerant passing through the refrigerant circulation line 8. The temperature is raised to be collected again to the hot water tank 13, the user can conveniently use the hot water collected in the hot water tank (13).

In addition, when a portion of the hot water circulation line 11 is used as the floor coil of the indoor floor as shown in FIG. 4, it is possible to naturally realize floor heating in winter.

In the description of the present invention, the overall operation of the cooling cycle and the heating cycle of the geothermal heating and cooling system is the same as in the prior art, and thus a detailed description thereof is omitted.

As described above, the present invention generates hot water by using a refrigerant temperature of a high temperature and a high pressure discharged from a compressor during cooling and heating operation in a geothermal air-conditioning system that improves energy utilization efficiency by using geothermal heat, and generates the hot water. Geothermal heating and cooling system that maximizes energy efficiency while realizing hot water and floor heating at the same time by storing hot water in a tank to allow users to use it conveniently. The effect of providing hot water and heating can be expected.

Claims (2)

During the cooling operation, the second heat exchange part 5 uses the second refrigerant circulated inside the geothermal heat exchange line 6 embedded in the ground at a predetermined depth in the ground to compress the high temperature and the high pressure in the compressor 1. After condensation, the cooling is performed by the heat exchange operation in the first heat exchange unit 3 while passing through the expansion valve 4 and the first heat exchange unit 3, During the heating operation, heating is performed by the heat exchange operation in the first heat exchange unit 3 using the first refrigerant compressed at high temperature and high pressure in the compressor 1, and then the heat exchange operation in the first heat exchanger 3 is performed. In the geothermal air-conditioning and heating system configured to re-supply to the compressor 1 in a state in which the first refrigerant having a temperature decrease by the second heat exchanger 5 exchanges heat with the second refrigerant having a constant temperature by geothermal heat. , A hot water heat exchanger 10 is formed to increase the temperature of the water moving through the hot water circulation line 11 by using the high temperature of the first refrigerant moving through the refrigerant circulation line 8 at the outlet side of the compressor 1. Hot water and heating device of geothermal heating and cooling system characterized in that. The method of claim 1, One side of the hot water circulation line 11 is connected to the water supply side of the hot water tank 13, and the other side is connected to the inlet side of the hot water tank 13, for the smooth circulation of hot water on the hot water circulation line (11) Install the hot water circulation pump (12), The hot water heat exchanger 10 is wound between the refrigerant circulation line 8 and the hot water circulation line 11 a predetermined number of times alternately so that the water in the hot water circulation line 11 is heated by the heat emitted from the refrigerant circulation line 8. Hot water and heating device of the geothermal heating and cooling system, characterized in that the rise.