KR20090086053A - Heating and cooling system and using a subsurface heat source - Google Patents

Abstract

A heating and cooling system using a subsurface heat source is provided to improve heating efficiency by using underground air heated by the heat of the earth and heating a heat exchange medium for heating a house. A heating and cooling system using a subsurface heat source comprises a first thermal storage tank(11), a heating part(20), a supplementary heat source feeding unit, and a heat pump(50). The first thermal storage tank stores a first heat exchange media(100). The heating part is connected to the first thermal storage tank and heats up by circulating the first heat exchange medium inside a house. The supplementary heat source feeding unit supplies one among the subsurface water and underground air used as a supplementary heat source for a second thermal storage tank(31) to the second thermal storage tank. The heat pump comprises 1/2 heat exchangers(51,52), a circulating pipe(53), an expansion valve(54) a compressor(55), and an all direction valve(56). The 1/2 heat exchanger is installed in a 1/2 thermal storage tank. The circulating pipe is connected to the 1/2 heat exchanger and forms a closed circuit. The expansion valve and the compressor are installed at the circulating pipe.

Description

Heating and cooling system and using a subsurface heat source}

The present invention relates to a cooling and heating device using an underground heat source, and more particularly to a cooling and heating device using an underground heat source such as underground air and groundwater.

In general, in agricultural production facilities such as greenhouses and greenhouses, energy emitted by the sun during the day is directly used by photosynthesis, and is stored in the ground or other heat-retaining materials for heating.

On the other hand, in order to use the heat and ground heat accumulated as described above is to use a groundwater relatively easy to recover heat. However, when groundwater is used as a heat exchange medium, the amount of heat generated by heating of a facility house or building for growing crops is relatively insufficient.

On the other hand, Korean Patent Laid-Open Publication No. 2000-63299 discloses a geothermal heat exchanger for circulating geothermal heat contained in the ground and groundwater or open water, and geothermal heat drawn up by the geothermal heat exchanger. The cooling and heating cycle which is made to make, and the apparatus which talks with the said heating cycle and heat the indoor hot water are disclosed.

And Korea Patent Publication No. 10-0628466 discloses a heating and cooling device using the underground air layer. The air-conditioning and heating system is formed by drilling and embedding the volcanic ash terrain to extend to the underground space, and a suction pipe for sucking underground air from the porous rock layer, and a blower having an air blower inside to blow and blow underground air through the suction pipe. And an induction pipe for guiding underground air blown from a blower inherent to the blower into a facility, and a technical configuration incorporating a heater in the blower.

However, since such a heating apparatus uses a heater as an auxiliary heat source, there is a problem in that a relatively high cost is required, and it is difficult to apply to a large-capacity heating and cooling apparatus such as a facility house.

In view of this point, Patent No. 800328 discloses a heat pump using underground air as an auxiliary heat source. However, when using the underground air as a secondary heat source, because the use of the air passing through the condenser there is a problem that can not be heated to a relatively high temperature.

The present invention is to solve the problems as described above, the heating and cooling device using an underground heat source that can improve the heating efficiency by heating the heat exchange medium for heating the house and facility house using the ground air heated by geothermal heat The purpose is to provide.

Another object of the present invention is to provide a cooling and heating apparatus using an underground heat source that absorbs heat from an underground heat source by a heat pump, and supplies the heat to a heat exchange medium for heating to increase the temperature of the heat exchange medium for cooling. Has its purpose.

Cold, heating device using the underground heat source of the present invention for achieving the above object

A first heat storage tank in which a first heat exchange medium is stored, and a heating unit connected to the first heat storage tank to circulate and heat the first heat exchange medium in the facility house;

Auxiliary heat source supply means for supplying the second heat storage tank with a selected one of ground water and underground air used as an auxiliary heat source in the second heat storage tank;

A first heat exchanger installed in the first heat storage tank, a second heat exchanger installed in the second heat storage tank, a circulation pipe connecting the first and second heat exchangers to form a closed circuit, and installed in the circulation pipe and the circulation pipe. And a heat pump having an expansion valve and a compressor, and a four-way valve installed in the circulation pipe and circulating in the forward and reverse directions through the expansion valve toward the first heat exchanger or the second heat exchanger. It is characterized by that.

In the present invention, the heating unit is connected to the first heat storage tank for supplying a first heat exchange medium, fan coil units connected by branch pipes from the supply pipe, the fan coil units connected to the first And a return pipe for returning the first heat exchange medium to the single heat storage tank, and a circulation pump provided in the supply pipe.

In addition, the auxiliary heat source supply means is connected to the second heat storage tank and connected to the basement intake pipe for taking ground water, the intake pump installed in the water intake pipe, and the second heat storage tank is connected to the heat exchanger and the second heat exchanger It is provided with a discharge pipe for discharging the ground water.

The auxiliary heat source supply means includes a plurality of circulation pipes connected to both ends of the second heat storage tank and extended underground to underground to allow heat exchange between the underground air or ground water and the second heat exchange medium in the second heat storage tank. It is provided with a circulation pump installed in the circulation pipe.

The auxiliary heat source supply means is bored in the basement to suck the underground air from the basement, the first and second manifolds installed around the suction pipe, and the first and second manifolds respectively connecting the second heat storage tank First and second connection pipes, both ends of the first and second manifolds respectively connected to the heat exchanger tube extending along the periphery of the suction pipe and exchanging heat with groundwater or underground air, A circulation pump is installed at one side to circulate the second heat exchange medium in the second heat storage tank.

The cooling and heating device using the underground heat source of the present invention uses groundwater or underground air as an auxiliary heat source and heats the first heat exchange medium by absorbing heat from the auxiliary heat source in the heat pump, thereby heating the facility house or building. 1 The temperature of the heat exchange medium can be relatively increased, and furthermore, the cooling or heating efficiency can be maximized.

Cooling and heating device using the underground heat source according to the present invention is capable of heating and heating the interior of the facility house or building, an embodiment thereof is shown in FIG.

Referring to the drawings, the cooling and heating device 10 using the underground heat source is connected to the first heat storage tank 11 and the first heat storage tank 11 in which the first heat exchange medium 100 is stored. The heating unit 20 for circulating and heating the first heat exchange medium 100, and the selected one of ground water and underground air used as auxiliary heat sources in the second heat storage tank 31 are supplied to the second heat storage tank 31. The auxiliary heat source supply means 40, the first heat exchanger 51 provided in the first heat storage tank 11, the second heat exchanger 52 provided in the second heat storage tank 31, A circulation pipe 53 which connects the first and second heat exchangers 51 and 52 to form a closed circuit, an expansion valve 54 and a compressor 55 installed in the circulation pipe 53, and the circulation pipe ( 53) to the first heat exchanger (51) or the second heat exchanger (52) side to circulate in the forward and reverse direction through the expansion valve 54 to achieve a cycle The heat pump 50 provided with the four-way valve 56 is provided.

The heating unit 20 is connected to the first heat storage tank 11 and the supply pipe 21 for supplying the first heat exchange medium 100, and the fan coil is connected to the branch pipe 22 from the supply pipe 21 A return pipe 24 connected to the units 23 and the fan coil units 23 to return the first heat exchange medium 100 to the first heat storage tank 11, and installed in the supply pipe 21. It is provided with a circulation pump 25. The heating unit 20 may be installed on the ground in the facility house, as shown in FIG.

The heating unit is not limited to the above embodiment, but may install a vertical heat exchanger in the facility house and circulate the first heat exchange medium in the first heat storage tank by using the supply pipe and the return pipe to the heat exchanger. 8 and 9, the first heat exchanger 51 may be installed directly inside the facility house without being installed in the first heat storage tank.

The auxiliary heat source supply means 40 is drilled in the basement and suction pipes 200 for sucking underground air from the base, and first and second manifolds 41 and 42 installed around the suction pipes 200. First and second connection pipes 43 and 44 for connecting the first and second manifolds 41 and 42 to the second heat storage tank 31, and the first and second manifolds 43 and 44. Are respectively connected to both ends of the heat exchanger pipes 45 extending along the periphery of the suction pipe 200 to exchange heat with groundwater or underground air, and the first and second connection pipes 43 and 44 of the first and second connection pipes 43 and 44. It is provided with one side and the circulation pump 46 which circulates the 2nd heat exchange medium in a 2nd heat storage tank. Here, the air taken in through the suction pipe may be supplied into the facility house or may heat the second heat exchange medium. In this case, the heat exchange tube may be directly connected to the first and second connection pipes 43 and 44 in a spirally wound state of the suction pipe 200 (see FIG. 5).

And another embodiment of the auxiliary heat source supply means is connected to the second heat storage tank 31 as shown in Figure 2 is connected to the basement intake pipe 61 for intake of groundwater and is installed in the intake pipe It is provided with a water intake pump 62 and a discharge pipe 63 connected to the second heat storage tank 31 for discharging the ground water heat exchanged with the second heat exchanger 52.

On the other hand, the auxiliary heat source supply means may be a heat exchange by supplying the air discharged from the suction pipe 200 to the second heat exchanger 52 as shown in FIG. In this case, a blower 210 may be installed in the housing 52a in which the suction pipe 200 or the second heat exchanger 52 is installed. Here, the air discharged from the second suction pipe 200 may be directly supplied through the duct 220 into the facility house.

6 and 7 show another embodiment of the auxiliary heat source supply means.

Referring to the drawings, the auxiliary heat source supply means 70 is installed in the periphery of the auxiliary heat source supply means 40 installed in the periphery of the suction hole 300 for drilling the underground air from the basement through the underground; 2nd manifolds 71 and 72, 1st and 1st connection pipes 73 and 74 which connect the 1st and 2nd manifolds 71 and 72 to the 2nd heat storage tank 31, respectively, Both ends are connected to the first and second manifolds 73 and 74, respectively, and the heat exchanger pipes 45 extend to the suction hole 300 to exchange heat with groundwater or underground air, and the first and second connection pipes. It is provided on one side of (43) (44), and has the circulation pump 46 which circulates the 2nd heat exchange medium in a 2nd heat storage tank.

Here, the upper side of the suction hole 300, the blowing pipe 77 does not extend to the underground air layer is installed. In addition, the second connection pipe 74 is provided with an auxiliary heat exchanger 78 for heat exchange between the underground air discharged from the blown pipe 77 and the second heat exchange medium. And a duct 79 for selectively supplying the underground air exchanged with the auxiliary heat exchanger 78 to the interior of the facility house may be further provided. Although not shown in the drawing, the duct may optionally further include a damper (not shown) for discharging air to and from the facility house. Although not shown in the drawing, a suction fan and a blower pipe may further include a blowing fan for sucking and discharging underground air.

Referring to the operation of the cold heating device using the underground heat source according to the present invention configured as described above are as follows.

First, in order to heat the interior of the facility house in winter, the first heat exchanger 51 installed in the first heat storage tank 11 is used as a condenser by operating the four-way valve 54 of the heat pump, and the second heat exchange is performed. Group 52 is used as the evaporator. Therefore, the refrigerant circulating in the heat pump is circulated from the compressor to the four-way valve to the first heat exchanger to the expansion valve to the second heat exchanger to the four-way valve to the compressor.

In this process, heat is absorbed from the underground air or the second heat storage tank 31 and the heat corresponding to the amount of heat and the amount of the compressor 55 is discharged from the first heat exchanger 51 to thereby provide the first heat exchange medium 100. Will be heated.

On the other hand, the auxiliary heat source supply unit is heat-exchanged with the underground air through the first connection pipe 43 and the heat exchange pipe 45 is heated after the second heat exchange medium is supplied to the third heat storage tank through the second connection pipe (44). In this process, since the secondary heat exchanger 78 is discharged through the suction pipe or the blown pipe 77 as shown in FIG. 7, the heat exchange efficiency may be increased.

The heat exchange medium heated as described above is supplied through the supply pipe of the heating unit 20 and then discharged from the fan coil unit 23 and then returned.

In the summer, the refrigerant flows through the four-way valve in the compressor.

When the four-way valve is selected to be connected to the exchanger, cooling is achieved. Accordingly, the refrigerant is circulated from the compressor to the four-way valve to the second heat exchanger to the expansion valve to the first heat exchanger to the four-way valve to the compressor.

In this process, the second heat exchanger is cooled by heat exchange with the underground heating source, thereby improving heat exchange efficiency of the first heat exchange medium by the first heat exchanger.

The first heat exchange medium 100 inside the first heat storage tank 11 is cooled by the first heat exchanger, and the cooled first heat exchange medium can be cooled by supplying the cooled first heat exchange medium to the fan coil unit through a supply pipe. In this case, when the underground air is used as the underground heat source, the underground air may be directly supplied to the facility house.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a conceptual diagram showing a heating apparatus using an underground heat source according to the present invention,

2 to 6 is a conceptual diagram showing other embodiments of a heating apparatus using an underground heat source according to the present invention.

Sectional drawing of the auxiliary heat source supply means shown in FIG.

8 is a conceptual view showing another embodiment of the heating apparatus according to the present invention.

Claims (6)

A first heat storage tank in which a first heat exchange medium is stored, and a heating unit connected to the first heat storage tank for circulating and heating the first heat exchange medium in the facility house; Auxiliary heat source supply means for supplying the second heat storage tank with a selected one of ground water and underground air used as an auxiliary heat source in the second heat storage tank; A first heat exchanger installed in the first heat storage tank, a second heat exchanger installed in the second heat storage tank, a circulation pipe connecting the first and second heat exchangers to form a closed circuit, and installed in the circulation pipe and the circulation pipe. And a heat pump having an expansion valve and a compressor, and a four-way valve installed in the circulation pipe and circulating in the forward and reverse directions through the expansion valve toward the first heat exchanger or the second heat exchanger. Cooling, heating apparatus using an underground heat source, characterized in that. The method of claim 1, The heating unit is connected to the first heat storage tank to supply a first heat exchange medium, fan coil units connected to the branch pipes from the supply pipe, and the fan coil units connected to the first heat storage tank by the first heat storage tank. Cooling and heating apparatus using an underground heat source, characterized in that it comprises a return pipe for returning the heat exchange medium and a circulation pump installed in the supply pipe. The method of claim 1,  The auxiliary heat source supply means is connected to the second heat storage tank is connected to the basement intake pipe for taking ground water, the intake pump installed in the water intake pipe, and the second heat storage tank is connected to the heat exchange with the second heat exchanger Cold heating device using an underground heat source, characterized in that provided with a discharge pipe for discharging groundwater. The method of claim 1, The auxiliary heat source supply means is bored in the basement to suck the underground air from the basement, the first and second manifolds installed around the suction pipe, and the first and second manifolds respectively connecting the second heat storage tank First and second connection pipes, both ends of the first and second manifolds respectively connected to the heat exchanger tube extending along the periphery of the suction pipe and exchanging heat with groundwater or underground air, Cooling and heating apparatus using an underground heat source, characterized in that provided with a circulation pump installed on one side for circulating the second heat exchange medium in the second heat storage tank. The method of claim 1, The auxiliary heat source supply means is drilled in the basement to connect the suction hole for sucking underground air from the basement, the first and second manifolds installed around the suction hole, and the first and second manifolds respectively to the second heat storage tank. The first and second connection pipes, and both ends connected to the first and second manifolds, respectively, extending to the ground along the periphery of the suction hole to exchange heat with groundwater or underground air, and the first and second connection pipes. A circulation pump installed at one side of the pipe to circulate the second heat exchange medium in the second heat storage tank, and an auxiliary heat exchanger installed at the second connection pipe to heat exchange the underground air and the second heat exchange medium discharged through the suction hole; Cooling, heating device using an underground heat source, characterized in that.  An auxiliary heat source supply means for supplying the second heat storage tank with a selected one of ground water and underground air used as an auxiliary heat source in the second heat storage tank; A first heat exchanger installed inside the facility house, a second heat exchanger installed in the second heat storage tank, a circulation pipe connecting the first and second heat exchangers to form a closed circuit, and installed in the circulation pipe and the circulation pipe. And a heat pump having an expansion valve and a compressor, and a four-way valve installed in the circulation pipe and circulating in the forward and reverse directions through the expansion valve toward the first heat exchanger or the second heat exchanger. Cooling, heating apparatus using an underground heat source, characterized in that.

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