US 11,835,268 B2
Underground heat exchange type cooling and heating system
Jong Woo Kim, Jeju-si (KR)
Assigned to INTERTECH Co., Ltd., Jeju-si (KR)
Filed by INTERTECH Co., Ltd., Jeju-si (KR)
Filed on Nov. 20, 2020, as Appl. No. 17/100,366.
Application 17/100,366 is a continuation of application No. PCT/KR2018/014382, filed on Nov. 21, 2018.
Claims priority of application No. 10-2018-0098610 (KR), filed on Aug. 23, 2018.
Prior Publication US 2021/0071915 A1, Mar. 11, 2021
Int. Cl. F24F 5/00 (2006.01); F24T 10/10 (2018.01); F24T 10/13 (2018.01); F24T 10/15 (2018.01); F24T 10/17 (2018.01)
CPC F24T 10/15 (2018.05) [F24F 5/0046 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An underground heat exchange system, comprising:
an underground heat exchange device which is buried under the ground to allow heat to be exchanged between a first heat medium flowing in the underground heat exchange device and a geothermal heat;
a plurality of cooling and heating units which cools or heats an indoor space by means of a second heat medium flowing in the plurality of cooling and heating units;
a plurality of heat pump units which allows heat to be exchanged between the first heat medium and the second heat medium to change the second heat medium to have a setting temperature for cooling or heating and individually performs a cooling or heating operation;
a first transfer circuit which transmits the first heat medium having undergone heat exchange in the underground heat exchange device to the plurality of heat pump units and transmits the first heat medium having undergone heat exchange in the plurality of heat pump units to the underground heat exchange device; and
a second transfer circuit which transmits the second heat medium having undergone heat exchange in the plurality of heat pump units to the plurality of cooling and heating units and transmits the second heat medium discharged from the plurality of cooling and heating units to the plurality of heat pump units,
wherein the underground heat exchange device includes:
a supply pipe which is connected to the first transfer circuit to supply the first heat medium from the outside to the underground;
a reverse pipe which collects and passes the first heat medium having undergone heat exchange;
a heat exchange pipe which is spirally formed to have at least one mountain portion along a length direction of the supply pipe to connect the supply pipe and the reverse pipe to each other and guide a movement of the first heat medium supplied through the supply pipe to exchange heat of the first heat medium to flow the first heat medium into the reverse pipe;
a return pipe which is connected to the reverse pipe and the first transfer circuit to discharge the first heat medium having undergone heat exchange from the underground to the outside; and
an interval maintaining member which is disposed along a length direction of the heat exchange pipe and is coupled to the at least one mountain portion, and
the heat exchange pipe is disposed around the supply pipe, the return pipe, and the reverse pipe to enclose the supply pipe, the return pipe, and the reverse pipe, the heat exchange pipe is disposed along an axial direction of the supply pipe; and the first heat medium which flows into the supply pipe through the first transfer circuit simultaneously passes through the supply pipe and the heat exchange pipe to undergo heat exchange and then flows into the reverse pipe, and the first heat medium flowing into the reverse pipe flows out to the first transfer circuit through the return pipe.
 
8. An underground heat exchange type cooling and heating system, comprising:
an underground heat exchange device which is buried under the ground to allow heat to be exchanged between a first heat medium flowing in the underground heat exchange device and a geothermal heat;
a plurality of cooling and heating units which cools or heats an indoor space by means of a second heat medium flowing in the plurality of cooling and heating units;
a plurality of heat pump units which allows heat to be exchanged between the first heat medium and the second heat medium to change the second heat medium to have a setting temperature for cooling or heating and individually performs a cooling or heating operation;
a plurality of heat storage tanks which stores the second heat medium having undergone heat exchange in the plurality of heat pump units and the second heat medium discharged from the plurality of cooling and heating units;
a first transfer circuit which transmits the first heat medium having undergone heat exchange in the underground heat exchange device to the plurality of heat pump units and transmits the first heat medium having undergone heat exchange in the plurality of heat pump units to the underground heat exchange device;
a second transfer circuit which transmits the second heat medium having undergone heat exchange in the plurality of heat pump units to the plurality of heat storage tanks and transmits the second heat medium stored in the plurality of heat storage tanks to the plurality of heat pump units; and
a third transfer circuit which transmits the second heat medium stored in the plurality of heat storage tanks to the plurality of cooling and heating units and transmits the second heat medium discharged from the plurality of cooling and heating units to the plurality of heat storage tanks,
wherein the underground heat exchange device includes:
a supply pipe which is connected to the first transfer circuit to supply the first heat medium from the outside to the underground;
a reverse pipe which collects and passes the first heat medium having undergone heat exchange;
a heat exchange pipe which is spirally formed to have at least one mountain portion along a length direction of the supply pipe to connect the supply pipe and the reverse pipe to each other and guide a movement of the first heat medium supplied through the supply pipe to exchange heat of the first heat medium to flow the first heat medium into the reverse pipe;
a return pipe which is connected to the reverse pipe and the first transfer circuit to discharge the first heat medium having undergone heat exchange from the underground to the outside; and
an interval maintaining member which is disposed along a length direction of the heat exchange pipe and is coupled to the at least one mountain portion, and the heat exchange pipe is disposed around the supply pipe, the return pipe, and the reverse pipe to enclose the supply pipe, the return pipe, and the reverse pipe, the heat exchange pipe is disposed along an axial direction of the supply pipe; and the first heat medium which flows into the supply pipe through the first transfer circuit simultaneously passes through the supply pipe and the heat exchange pipe to undergo heat exchange and then flows into the reverse pipe, and the first heat medium flowing into the reverse pipe flows out to the first transfer circuit through the return pipe.
 
9. An underground heat exchange system, comprising:
an underground heat exchange device which is buried under the ground to allow heat to be exchanged between a first heat medium flowing in the underground heat exchange device and a geothermal heat;
a plurality of cooling and heating units which cools or heats an indoor space by means of a second heat medium flowing in the plurality of cooling and heating units;
a plurality of heat pump units which allows heat to be exchanged between the first heat medium and the second heat medium to change the second heat medium to have a setting temperature for cooling or heating and individually performs a cooling or heating operation;
a heat storage tank in which the first heat medium having undergone heat exchange in the underground heat exchange device flows into an upper side to be stored and the first heat medium having undergone heat exchange in the plurality of heat pump units flows into a lower side to be stored;
a first transfer circuit which transmits the first heat medium having undergone heat exchange in the underground heat exchange device into the upper side of the heat storage tank and transmits the first heat medium which flows into the lower side of the heat storage tank to be stored, to the underground heat exchange device;
a second transfer circuit which transmits the first heat medium flowing into the upper side of the heat storage tank to be stored, to the plurality of heat pump units, and transmits the first heat medium having undergone heat exchange in the plurality of heat pump units into the lower side of the heat storage tank; and
a third transfer circuit which transmits the second heat medium having undergone heat exchange in the plurality of heat pump units to the plurality of cooling and heating units and transmits the second heat medium discharged from the plurality of cooling and heating units to the plurality of heat pump units,
wherein the underground heat exchange device includes:
a supply pipe which is connected to the first transfer circuit to supply the first heat medium from the outside to the underground;
a reverse pipe which collects and passes the first heat medium having undergone heat exchange;
a heat exchange pipe which is spirally formed to have at least one mountain portion along a length direction of the supply pipe to connect the supply pipe and the reverse pipe to each other and guide a movement of the first heat medium supplied through the supply pipe to exchange heat of the first heat medium to flow the first heat medium into the reverse pipe;
a return pipe which is connected to the reverse pipe and the first transfer circuit to discharge the first heat medium having undergone heat exchange from the underground to the outside; and
an interval maintaining member which is disposed along a length direction of the heat exchange pipe and is coupled to the at least one mountain portion, and
the heat exchange pipe is disposed around the supply pipe, the return pipe, and the reverse pipe to enclose the supply pipe, the return pipe, and the reverse pipe, the heat exchange pipe is disposed along an axial direction of the supply pipe; and the first heat medium which flows into the supply pipe through the first transfer circuit simultaneously passes through the supply pipe and the heat exchange pipe to undergo heat exchange and then flows into the reverse pipe, and the first heat medium flowing into the reverse pipe flows out to the first transfer circuit through the return pipe.