KR20120056180A - Geothermal cooling and heating apparatus - Google Patents

Abstract

PURPOSE: A geothermal cooling and heating device is provided to prevent a shortage of circulated water by supplying the circulated water in a thermal storage tank to a first three-way valve through one of the hot water supply pipe and a cooling water supply pipe. CONSTITUTION: A geothermal cooling and heating device comprises a first three-way valve(141), a second three-way valve(140), a third three-way valve(143), a geothermal heat exchanger member(150), a geothermal sub-heat exchanger(151), a heat pump(152), and a thermal storage tank(153). A fluid supply tube(101) for geothermal heat-exchanging and a fluid return pipe(102) for the geothermal heat-exchanging connect an interval between the geothermal heat exchanger member and the geothermal sub-heat exchanger. A fluid pump(120) for the geothermal heat-exchanging is installed inside the geothermal heat exchanger member. If the fluid pump(120) for the geothermal heat-exchanging is operated, geothermal fluids, which are heat exchanged with the ground are supplied to the geothermal sub-heat exchanger through the fluid supply tube for geothermal heat-exchanging.

Description

Geothermal cooling and heating apparatus

The present invention relates to a geothermal heating and cooling device.

In order to protect the environment, researches to promote the use of renewable energy are being conducted in various fields, one of which is geothermal heating and cooling system using geothermal heat.

Geothermal heating and cooling device has the advantages of environmentally friendly, economical, and convenient by performing cooling or heating using geothermal heat.

However, in the conventional geothermal heating and cooling device, when the circulating fluid is circulated between the heat pump and the heat storage tank, a phenomenon in which the actual circulation amount of such circulating fluid is insufficient on the piping where the circulating fluid is circulated between the heat pump and the heat storage tank is insufficient compared to the required circulation amount. If such a lack of circulation water occurs, the normal operation of the geothermal heating and cooling device may be difficult.

On the other hand, in the conventional geothermal heating and cooling device, when there are a plurality of demand sources connected to the heat storage tank, the temperature of the circulating fluid re-introduced into the heat storage tank after cooling or heating is performed while all the plurality of demand sources are heated and the temperature is raised in the process. The heat storage tank outlet temperature of the circulating fluid flowing out of the heat storage tank is adjusted so that the required heat storage tank inlet temperature is discharged to the demand destination. At this time, when the heating and cooling of some of the demand source is stopped and only the heating and cooling of the other part of the demand is made, the demand source through the circulating fluid is reduced, so that the temperature rise as much as required is not achieved. The temperature of the circulating fluid to be re-introduced to the difference is different from the required storage tank inlet temperature, the temperature stratification that is stratified in accordance with the temperature of the fluid in the storage tank can not be made properly.

An object of the present invention is to provide a geothermal heating and cooling device having a structure that can prevent the lack of circulating water on the pipe between the heat pump and the heat storage tank during operation.

It is another object of the present invention to provide a geothermal heating and cooling device having a structure in which the temperature of a circulating fluid which is re-introduced into a heat storage tank after passing through a plurality of demands can be adjusted to a required heat storage tank inlet temperature.

Geothermal heating and cooling device according to an aspect of the present invention as being capable of performing air conditioning for the demand by using geothermal,

A geothermal heat exchange member that exchanges heat with the ground while the geothermal heat exchange fluid flows; A heat storage tank capable of supplying a circulating fluid to the demand destination and having a temperature stratification in which the circulating fluid is stratified according to a temperature therein; A heat pump connected to each of the geothermal heat exchange member and the heat storage tank and capable of transferring heat from the geothermal heat exchange member to the heat storage tank or transferring heat from the heat storage tank to the geothermal heat exchange member; A heat storage tank side upper flow pipe connecting the heat storage tank upper part and the heat pump such that a circulating fluid having a relatively high temperature flows between the heat storage tank upper part and the heat pump; A heat storage tank side lower flow pipe connecting the heat storage tank lower portion and the heat pump so that a circulating fluid having a relatively low temperature flows between the heat storage tank lower portion and the heat pump; A first three-way valve installed in any one of the heat storage tank side upper flow pipe and the heat storage tank side lower flow pipe; A hot water replenishment pipe connecting between the first three-way valve and the heat storage tank upper part such that a relatively high temperature circulating fluid on the heat storage tank can be replenished with the first three-way valve; And a cold water supplement pipe connecting the first three-way valve and the bottom of the heat storage tank so that a relatively low temperature circulating fluid in the bottom of the heat storage tank can be replenished with the first three-way valve.

When the amount of circulation of the circulating fluid flowing along the heat storage tank side upper flow pipe and the heat storage tank side lower flow pipe is less than the required circulation amount, the circulating fluid in the heat storage tank passes through at least one of the hot water supplement pipe and the cold water supplement pipe. It is characterized by being supplemented with a three-way valve.

According to the geothermal heating and cooling device according to an aspect of the present invention, a first three-way valve is installed on the storage tank side lower flow pipe connecting between the heat pump and the heat storage tank, and a hot water supplement pipe connected to each of the upper and lower diffusers in the heat storage tank; As the cold water make-up pipe is connected to the first three-way valve, if the circulation amount of the circulating fluid flowing along the heat storage tank upper flow pipe and the heat storage tank lower flow pipe is less than the required circulation amount, Circulating fluid in the heat storage tank can be replenished with the first three-way valve. Then, there is an effect that the shortage of circulating fluid circulating between the heat pump and the heat storage tank along the heat storage tank side upper flow pipe and the heat storage tank side lower flow pipe can be prevented during operation of the geothermal heating and cooling device.

According to the geothermal heating and cooling device according to another aspect of the present invention, as the third three-way valve and the third three-way valve is connected to the flow pipe without the third three-way valve of the demand-side upper flow pipe and the demand-side lower flow pipe, A portion of the circulating fluid re-introduced into the heat storage tank through the demand side upper flow pipe is introduced into the third three way valve through the third three way valve connecting pipe, and mixed with the circulating fluid flowing out of the heat storage tank toward the customer through the demand side lower flow pipe. Then, the third three-way valve is connected to the demand-side lower flow pipe and the third three-way valve connection pipe so that the temperature of the circulating fluid flowing back through the demand source and then reflowed into the heat storage tank through the demand-side upper flow pipe can be adjusted to the required heat storage tank inlet temperature. Each fluid flowing through it may be operated to mix. Then, even in the case where the heating and cooling of some of the demand sources is stopped and only heating and cooling of the other demand sources is performed, the storage tank inflow temperature, which requires the temperature of the circulating fluid that is re-introduced into the storage tank via the plurality of demand sources, is required. There is an effect that can be adjusted to.

According to the geothermal heating and cooling device according to another aspect of the present invention, as the geothermal auxiliary heat exchanger is installed between the geothermal heat exchange member and the heat pump, and as the second three-way valve connects the geothermal auxiliary heat exchanger, the heat pump and a part of the customer, While cooling the main part of the customer and heating the part of the customer together, there is an effect that noise, vibration, etc. related to the geothermal auxiliary heat exchanger and the like may not be transmitted to the customer or the part of the customer.

According to the geothermal heating and cooling device according to another aspect of the present invention, as the bypass pipe is installed, when the load supply pump starts to operate, the bypass pipe open / close valve detects this and opens the bypass pipe, and reflows into the heat storage tank. By allowing the circulating velocity of the circulating fluid to be made relatively higher than when the circulating fluid does not pass through the bypass pipe, the remaining circulating fluid in the last operating cycle existing in the demand-side upper flow tube and the demand-side lower flow tube can be quickly removed. And, accordingly, there is an effect that can be quickly cooled and heating to the temperature required by the demand destination.

1 is a view showing the configuration of a geothermal heating and cooling device according to a first embodiment of the present invention.
2 is a view showing a part of the geothermal heating and cooling device according to a second embodiment of the present invention.

Hereinafter, a geothermal heating and cooling device according to embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view showing the configuration of a geothermal heating and cooling device according to a first embodiment of the present invention.

Referring to FIG. 1, the geothermal heating and cooling device 100 according to the present embodiment includes a first three-way valve 141, a second three-way valve 140, a third three-way valve 143, and geothermal heat. Including the exchange member 150, the geothermal auxiliary heat exchanger 151, the heat pump 152, and the heat storage tank 153, it is possible to perform the heating and cooling to the customer 156 using the geothermal heat.

The configuration of the geothermal heating and cooling device 100 is exemplary, and some configurations may be omitted.

Reference numerals 101 and 102 denote geothermal heat exchange fluid supply pipes and geothermal heat exchange fluid return pipes connecting between the geothermal heat exchange member 150 and the geothermal heat exchanger heat exchanger 151, and reference numeral 120 denotes the geothermal heat exchange member 150. Geothermal heat exchange fluid pump is installed. When the geothermal heat exchange fluid pump 120 is operated, the geothermal heat exchange fluid heat-exchanged with the ground in the geothermal heat exchange member 150 is supplied to the geothermal auxiliary heat exchanger 151 through the geothermal heat exchange fluid supply pipe 101. The geothermal heat exchange fluid via the geothermal auxiliary heat exchanger 151 is returned to the geothermal heat exchange member 150 through the geothermal heat exchange fluid return pipe 102.

The geothermal heat exchange member 150 is buried in the ground and is heat exchanged with the ground while the geothermal heat exchange fluid, for example, water including an antifreeze flows.

In this embodiment, the geothermal heat exchange member 150 is presented as a well type formed therein a well in which the geothermal heat exchange fluid is introduced to receive geothermal heat exchange, which is exemplary, and the geothermal heat exchange fluid supply pipe 101 is provided. And the geothermal heat exchange fluid return tube 102 may be presented in various forms such as hermetically connected to each other in the ground.

The geothermal auxiliary heat exchanger 151 is installed between the geothermal heat exchange member 150 and the heat pump 152, the geothermal heat exchange fluid passing through the geothermal heat exchange member 150, and the heat pump 152. Heat pump circulating fluids passing through the heat exchange with each other.

According to the application of the geothermal auxiliary heat exchanger 151, the geothermal heat exchange fluid into which the antifreeze and the like are mixed may not directly flow into other components in the ground of the geothermal air conditioning system 100, such as the heat pump 152. have.

Reference numerals 103 and 104 denote heat pump supply pipes and heat pump recovery pipes connecting the geothermal auxiliary heat exchanger 151 and the heat pump 152, and reference numeral 121 denotes an auxiliary geothermal heat pump. When the auxiliary geothermal heat pump 121 is operated, circulating fluid between the geothermal auxiliary heat exchanger 151 and the heat pump 152 flows along the heat pump supply pipe 103 and the heat pump recovery pipe 104. Can be.

The heat pump 152 is connected to the geothermal heat exchange member 150 and the heat storage tank 153, respectively, and transfers heat from the geothermal heat exchange member 150 to the heat storage tank 153, or in the heat storage tank 153. It is possible to transfer heat to the geothermal heat exchange member 150.

In the present embodiment, for example, the heat pump 152 is indirectly connected to the geothermal heat exchange member 150 via the geothermal auxiliary heat exchanger 151.

The heat pump 152 is a component that produces cold / hot heat for cooling and heating for the demand destination 156 using geothermal heat. The heat pump 152 may be composed of a compressor, a condenser, an expansion valve, an evaporator, and a 4-way valve.

The second three-way valve 140 connects the geothermal auxiliary heat exchanger 151, the heat pump 152, and a portion 157 of the demand destination 156.

Reference numeral 115 is a portion supply source supply pipe connecting the heat pump return pipe 104 and the first supply header 129, reference numeral 116 connects the first return header 130 and the second three-way valve 140. The first supply header 129 is to distribute the circulating fluid to the portion 157 of the plurality of demand source when the plurality of the demand source 156 is composed of a plurality of demand source 129, The first return header 130 collects the circulating fluid via the portions 157 of the plurality of demand destinations. Reference numeral 128 is a part source supply pipe opening and closing valve for opening and closing the part source supply pipe 115.

Here, when the demand source 156 is an air conditioner or the like, a part of the demand source 157 may be presented as a floor coil installed at the bottom of the space in which the air conditioner is installed.

In the present embodiment, the second three-way valve 140 is installed on the heat pump supply pipe 103 and connected to the partial demand return pipe 116. Then, according to the operation of the second three-way valve 140, circulating fluid between the geothermal auxiliary heat exchanger 151 and the heat pump 152 is the geothermal auxiliary heat exchanger 151 and the heat pump 152. Only a part of the cycle may be circulated, or some of the flow may be flowed to the portion 157 of the demand source through the some source customer supply pipe 115 and the some source customer return pipe 116. When cooling is performed to the demand source 156, a part of the heat discarded from the heat pump 152 toward the geothermal heat exchange member 150 is transferred to the portion 157 of the demand source, thereby heating.

When cooling is required for a major portion of the demand source 156 and heating is required for a portion 157 of the demand source 156, transfer from the heat pump 152 to the geothermal auxiliary heat exchanger 151. The second three-way valve through the heat pump supply pipe 103 and the circulating fluid flowing through the heat pump supply pipe 103 so that at least a portion of the heat to be transferred to the portion 157 of the demand source 156 is 116. The flowing circulating fluid can be operated to mix.

As described above, the geothermal auxiliary heat exchanger 151 is installed between the geothermal heat exchange member 150 and the heat pump 152, the second three-way valve 140 is the geothermal auxiliary heat exchanger 151, By connecting the heat pump 152 and the portion 157 of the demand source, while heating the main portion of the demand source 156 while heating can be performed together with the portion 157 of the demand source, Noise, vibration, and the like related to the geothermal auxiliary heat exchanger 151 may not be transmitted to the demand source 156 or the portion 157 of the demand source.

Reference numeral 105 is a heat storage tank side lower flow pipe connecting the lower part of the heat pump 152 and the heat storage tank 153 so that a circulating fluid having a relatively low temperature flows between the heat storage tank 153 and the heat pump 152. Reference numeral 110 is a heat storage tank side upper flow pipe connecting the upper portion of the heat pump 152 and the heat storage tank 153 so that the circulating fluid of a relatively high temperature flows between the heat storage tank 153 and the heat pump 152. Reference numeral 122 denotes a heat storage pump for allowing a circulating fluid between the heat pump 152 and the heat storage tank 153 to flow in the heat storage tank side lower flow pipe 105 and the heat storage tank side upper flow pipe 110.

The heat storage tank 153 may supply the circulation fluid accommodated therein to the demand destination 156, and temperature stratification is performed in which the circulation fluid is stratified according to temperature.

Here, in the temperature stratification, a layer having a uniform temperature is formed in the heat storage tank 153, and a layer having a relatively low temperature is formed below the heat storage tank 153 according to a difference in temperature of each layer, and a layer having a relatively high temperature. Is formed on the upper side of the heat storage tank 153.

In order to facilitate the temperature stratification, the lower diffuser 154 and the upper diffuser 155 are installed inside the heat storage tank 153.

The lower diffuser 154 is connected to the heat storage tank side lower flow pipe 105, and a plurality of discs are disposed with a height difference, and the circulating fluid flowing in and out is ejected in the circumferential direction thereof, so that the heat storage tank 153 is inside. It can be layered at.

The upper diffuser 155 is connected to the heat storage tank side upper flow pipe 110, a plurality of disks are arranged with a height difference, the circulating fluid flowing out flows in the circumferential direction, the inside of the heat storage tank 153 It can be layered at.

The heat storage tank 153 may be open at an upper portion thereof to achieve an atmospheric pressure atmosphere.

The first three-way valve 141 is to be installed in any one of the heat storage tank side upper flow pipe 110 and the heat storage tank side lower flow pipe 105, in this embodiment is to be installed in the heat storage tank side lower flow pipe (105). do.

Reference numeral 107 denotes the first three-way valve under the heat storage tank 153, in this embodiment, so that the relatively low temperature circulating fluid of the lower diffuser 154, that is, cold water, can be replenished with the first three-way valve 141. 141 and the lower diffuser 154 under the heat storage tank 153 are connected to each other.

Reference numeral 109 denotes the first three-way valve so that the relatively high temperature circulating fluid, ie, hot water, of the heat storage tank 153, in this embodiment, the upper diffuser 155 may be replenished with the first three-way valve 141. 141 and the upper diffuser 155 above the heat storage tank 153.

Reference numeral 126 denotes a cold water supplement pipe opening / closing valve for opening and closing the cold water supplement pipe 107, and reference numeral 127 denotes a hot water supplement pipe opening / closing valve for opening and closing the hot water supplement pipe 109.

As described above, the first three-way valve 141 is installed on the heat storage tank side lower flow pipe 105 connecting between the heat pump 152 and the heat storage tank 153, and the upper side of the heat storage tank 153 is provided. As the hot water supplement pipe 109 and the cold water supplement pipe 107 connected to the diffuser 155 and the lower diffuser 154 are respectively connected to the first three-way valve 141, the heat storage tank side upper flow pipe ( When the circulation amount of the circulating fluid flowing along the 110 and the storage tank side lower flow pipe 105 is less than the required circulation amount, the heat storage tank through at least one of the hot water supplement pipe 109 and the cold water supplement pipe 107 ( Circulating fluid in 153 may be replenished with the first three-way valve 141. Then, the circulation fluid circulating between the heat pump 152 and the heat storage tank 153 along the heat storage tank side upper flow pipe 110 and the heat storage tank side lower flow pipe 105 during operation of the geothermal heating and cooling device 100. Deficiency can be prevented.

Reference numeral 142 denotes a second switching valve installed on the heat storage tank side lower flow pipe 105, and reference numeral 108 denotes a second switching valve connecting the heat storage tank side upper flow pipe 110 and the second switching valve 142. It is a connector.

Reference numeral 145 denotes a first switching valve installed on the heat storage tank side upper flow pipe 110, and reference numeral 106 denotes a first switching valve connecting the heat storage tank side lower flow pipe 105 and the first switching valve 145. It is a connector.

Here, the first three-way valve 141, the second three-way valve 140 and the third three-way valve 143 which will be described later are mixed in the other direction by mixing each circulating fluid flowing in two directions at the required ratio. The first switching valve 145, the second switching valve 142, and the third switching valve 144, which will be described later, are closed in one of two directions and in the other of the two directions. Incoming circulating fluid can flow out of the other direction.

Reference numeral 111 connects the lower diffuser 154 and the second supply header 124 to allow a relatively low temperature circulating fluid to flow between the lower diffuser 154 and the demand source 156 under the heat storage tank 153. The second flow return header 125 and the second flow return header 125 and the flow of the relatively high temperature circulating fluid flows between the upper diffuser 155 and the demand source 156 on the heat storage tank 153, the reference numeral 112, It is a demand-side upper flow pipe connecting the upper diffuser 155, the second supply header 124 is to distribute the circulating fluid to the plurality of demand destination 156 when the demand destination 156 is composed of a plurality of, The second return header 125 collects the circulating fluid via the plurality of demand destinations 156. Reference numeral 123 denotes a load supply pump for allowing a circulating fluid to flow on the demand-side lower flow pipe 111 and the demand-side upper flow pipe 112.

The third three-way valve 143 is to be installed in any one of the demand-side lower flow pipe 111 and the demand-side upper flow pipe 112, in this embodiment is to be installed in the demand-side lower flow pipe 111. do.

Reference numeral 114 denotes a flow pipe in which the third three-way valve 143 is not installed among the demand-side upper flow pipe 112 and the demand-side lower flow pipe 111, and in this embodiment, the demand-side upper flow pipe 112 and the It is a 3rd three-way valve connection pipe which connects the 3rd three-way valve 143.

As described above, a flow pipe in which the third three-way valve 143 is not installed among the demand-side upper flow pipe 112 and the demand-side lower flow pipe 111, and in this embodiment, the demand-side upper flow pipe 112 and the As the third three-way valve 143 is connected by the third three-way valve connecting pipe 114, a part of the circulating fluid that is re-introduced into the heat storage tank 153 through the demand-side upper flow pipe 112 may be formed. Circulating fluid that flows into the third three-way valve 143 through the three-way valve connection pipe 114, and flows out of the heat storage tank 153 toward the demand destination 156 through the demand-side lower flow pipe 111. After mixing, the temperature of the circulating fluid flowing through the demand source 156 and then reintroduced into the heat storage tank 153 through the demand side upper flow pipe 112 can be adjusted to the required heat storage tank inlet temperature. Three-way valve (143) The respective fluid flowing through the exchanger demand-side lower flow tube (111) and said third three-way valve connecting pipe 114 may be enabled to mix. Then, even when the heating and cooling to some of the demand source 156 of the plurality of demand source 156 is stopped and only heating and cooling of the other demand source 156 is made, the heat storage tank after passing through the plurality of demand source 156 ( The temperature of the circulating fluid re-introduced to 153 may be adjusted to the required heat storage tank inlet temperature.

For example, when cooling to some of the demand source 156 of the plurality of demand source 156, some of the relatively high temperature circulating fluid flowing through the demand-side upper flow pipe 112 is the third three-way valve connector The temperature of the circulating fluid flowing into the third three-way valve 143 through the 114 and flowing with the relatively low temperature circulating fluid flowing through the demand-side lower flow pipe 111 is introduced into the demand-side 156. Is raised, and thus the circulating fluid flowing into the heat storage tank 153 through the demand side upper flow pipe 112 after passing through the some customers 156 can be adjusted to the required heat storage tank inlet temperature.

Reference numeral 144 denotes a third switching valve installed in the demand-side upper flow pipe 112, and reference numeral 113 denotes a third switching valve connecting the third change-over valve 144 and the demand-side lower flow pipe 111. It is a tube.

Hereinafter, the operation of the geothermal heating and cooling device 100 will be described.

First, at the time of heating operation to the demand source 156, the second destination valve 140, the partial demand destination return pipe 116 side, the partial demand destination supply pipe opening and closing valve 128, the cold water supplement pipe opening and closing valve ( 126), the second switch valve 142 to the second switch valve connector 108, the first switch valve 145 to the first switch valve 106, the third switch valve At 144 the second return header 125 side is closed.

In the above state, when each of the pumps 120, 121, 122, and 123 is operated, the geothermal heat exchange fluid obtained by heat exchange with the geothermal heat exchange member 150 is circulated with the circulating fluid in the geothermal auxiliary heat exchanger 151. Heat exchanged and such heat exchanged circulating fluid enters the heat pump 152.

Then, in the heat pump 152, a relatively high temperature circulating fluid including heat through the heat storage tank side upper flow pipe 110 flows into the upper portion of the heat storage tank 153 through the upper diffuser 155 and is formed.

Thereafter, after the relatively high temperature circulating fluid flows out of the heat storage tank 153 through the other end of the upper diffuser 155, the third switching valve 144, the third switching valve connecting pipe 113, The demand source is sequentially passed through the second supply header 124, the demand source 156, the second return header 125, the third three-way valve connecting pipe 114, and the third three-way valve 143. After heating to 156, it is re-introduced into the lower portion of the heat storage tank 153 through the lower diffuser 154 and stratified.

Then, after the relatively low temperature circulating fluid flows out of the heat storage tank 153 through the other stage of the lower diffuser 154, the second switching valve 142 and the first three-way valve 141 Flows back into the heat pump 152.

In the heat pump 152, a relatively low temperature circulating fluid flows into the geothermal auxiliary heat exchanger 151 through the heat pump return pipe 104, and heat exchanges again with the geothermal heat exchange fluid to obtain heat.

The heating operation for the demand source 156 may be performed while forming the cycle as described above.

In the heating operation process as described above, when the circulating fluid passing through the first three-way valve 141 is insufficient, hot water in the upper portion of the heat storage tank 153 through the hot water supplement pipe 109 may be replenished.

On the other hand, during the cooling operation with respect to the demand source 156, in the second three-way valve 140, the partial demand destination return pipe 116 side, the partial demand destination supply pipe opening and closing valve 128, the hot water supplement pipe opening and closing valve ( 127, the first three-way valve 141 side from the second switch valve 142, the heat pump 152 side from the first switch valve 145, and the third switch valve 144 from the first switch valve 142. 3 The switching valve connector (113) side is closed.

In the above state, when each pump 120, 121, 122, 123 is operated, the geothermal heat exchange fluid that loses heat while being heat-exchanged in the geothermal heat exchange member 150 is circulated with the circulating fluid in the geothermal auxiliary heat exchanger 151. Heat exchanged and such heat exchanged circulating fluid enters the heat pump 152.

Then, the relatively low temperature circulating fluid is transferred to the heat storage tank side upper flow pipe 110, the second switching valve connecting pipe 108, the second switching valve 142 and the lower diffuser 154 in the heat pump 152. Inflow into the lower portion of the heat storage tank 153 through the stratified.

Then, after the relatively low temperature circulating fluid flows out of the heat storage tank 153 through the other end of the lower diffuser 154, the third three-way valve 143, the second supply header 124, the demand source 156, after cooling the demand destination 156 while sequentially passing through the second return header 125 and the third switching valve 144, the heat storage tank 153 through the upper diffuser 155. It is reflowed to the top of) and stratified.

Then, after the relatively high temperature circulating fluid flows out of the heat storage tank 153 through the other end of the upper diffuser 155, the first switching valve 145, the first switching valve connecting pipe 106 and It is re-introduced into the heat pump 152 via the first three-way valve 141.

In the heat pump 152, a relatively high temperature circulating fluid flows into the geothermal auxiliary heat exchanger 151 through the heat pump return pipe 104, and heat exchanges again with the geothermal heat exchange fluid to lose heat.

The cooling operation for the demand source 156 may be performed while forming the cycle as described above.

In the cooling operation process as described above, when the circulating fluid passing through the first three-way valve 141 is insufficient, the cold water of the bottom of the heat storage tank 153 may be replenished through the cold water supplement pipe 107.

On the other hand, during the operation of supplying heating to the part 157 of the demand destination while cooling the demand destination 156, the second three-way valve 140 and the part of the demand destination return pipe 116 and Except for opening some of the demand source supply pipe opening and closing valve 128, the respective components are opened and closed in the same manner as in the cooling operation.

In the above state, the process of performing cooling up to the heat pump 152 and the demand destination 156 is the same as that of the cooling operation described above, and thus redundant description is omitted.

In the heat pump 152, a relatively high temperature circulating fluid flows into the geothermal auxiliary heat exchanger 151 through the heat pump return pipe 104, and heat exchanges again with the geothermal heat exchange fluid to lose heat.

At this time, some of the relatively high temperature circulating fluid passing through the heat pump return pipe 104 may be partially supplied to the demand source supply pipe 115, the first supply header 129, a part of the demand destination 157, and the second. Partial heating is performed on the part 157 of the customer destination via the return header 130 and the part customer return pipe 116, and then to the heat pump 152 through the second three-way valve 140. Inflow.

In the cycle as described above, the heating operation for the portion 157 of the demand source may be performed together with the cooling operation for the demand source 156.

Hereinafter, a geothermal air conditioning system according to a second embodiment of the present invention will be described with reference to the drawings. In carrying out this description, the description overlapping with the contents already described in the above-described first embodiment of the present invention will be replaced with the description thereof.

2 is a view showing a part of the geothermal heating and cooling device according to a second embodiment of the present invention.

Referring to FIG. 2, in the present embodiment, a plurality of demand sources 256 are connected to the demand destination lower flow pipe 211 and the demand destination upper flow pipe 212, and the demand destination on the demand destination lower flow pipe 211. A load supply pump 223 is installed to flow circulating fluid from the heat storage tank 253 to the plurality of demand sources 256 along the upper flow pipe 212 and the demand-side lower flow pipe 211.

In this embodiment, the bypass unit 260 is provided. The bypass unit 260 includes a bypass pipe 261, a bypass pipe open / close valve 262, and a temperature sensor 263.

The bypass pipe 261 has a diameter larger than that of the demand-side upper flow pipe 212 and the demand-side lower flow pipe 211, and thus the demand-side upper flow pipe 212 and the demand-side lower flow pipe 211. The flow of the circulating fluid can be smoother and the amount of fluid circulation per unit time can be increased relatively. In addition, the bypass pipe 261 may include the demand-side upper flow pipe 212 and the demand-side lower flow pipe 211 at the end of the plurality of demand sources 256 based on the flow direction of the circulating fluid. And both ends thereof are connected to each other so that the circulating fluid may bypass the last demand source 256 and pass through the bypass pipe 261.

The bypass pipe opening valve 262 opens and closes the bypass pipe 261, and is electrically connected to the temperature sensor 263 and the load supply pump 223.

At the beginning of operation of the load supply pump 223, the circulating fluid remaining in the last demand cycle is present in the demand-side upper flow pipe 212 and the demand-side lower flow pipe 211, and the remaining circulating fluid is removed. Until then, the demand source 256 is difficult to heat and cool to the required temperature.

In the present embodiment, as the bypass pipe 262 is installed, when the load supply pump 223 starts to operate, the bypass pipe opening / closing valve 262 detects the bypass pipe 262. To open the circulation flow rate of the circulating fluid re-introduced into the heat storage tank 253 to be relatively larger than the case where the circulating fluid does not pass through the bypass pipe 262. Residual circulating fluid in the last operating cycle present in the demand-side lower flow pipe 211 can be quickly removed, thereby allowing the air conditioning to be rapidly heated to the temperature required by the demand-source 256.

On the other hand, the temperature sensor 263 detects the temperature of the circulating fluid flowing in the bypass pipe 261.

When the temperature of the circulating fluid in the bypass pipe 261 detected by the temperature sensor 263 reaches the required temperature, the bypass pipe open / close valve 262 closes the bypass pipe 261. . Then, the circulating fluid does not pass through the bypass pipe 261, but flows back into the heat storage tank 253 after passing through the demand source 256 at the end, and thus normal cooling and heating operation may be performed.

While the invention has been shown and described with respect to specific embodiments thereof, those skilled in the art can variously modify the invention without departing from the spirit and scope of the invention as set forth in the claims below. And that it can be changed. However, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

According to the geothermal heating and cooling device according to an aspect of the present invention, the shortage of circulating water on the pipe between the heat pump and the heat storage tank can be prevented during operation, and the temperature of the circulating fluid re-introduced into the heat storage tank after passing through a plurality of demand destinations is It can be tailored to the required heat storage inlet temperature, which makes the industry highly available.

Claims (5)

In the geothermal heating and cooling device capable of performing heating and cooling to the demand destination by using geothermal,
A geothermal heat exchange member that exchanges heat with the ground while the geothermal heat exchange fluid flows;
A heat storage tank capable of supplying a circulating fluid to the demand destination and having a temperature stratification in which the circulating fluid is stratified according to a temperature therein;
A heat pump connected to each of the geothermal heat exchange member and the heat storage tank and capable of transferring heat from the geothermal heat exchange member to the heat storage tank or transferring heat from the heat storage tank to the geothermal heat exchange member;
A heat storage tank side upper flow pipe connecting the heat storage tank upper part and the heat pump such that a circulating fluid having a relatively high temperature flows between the heat storage tank upper part and the heat pump;
A heat storage tank side lower flow pipe connecting the heat storage tank lower portion and the heat pump so that a circulating fluid having a relatively low temperature flows between the heat storage tank lower portion and the heat pump;
A first three-way valve installed in any one of the heat storage tank side upper flow pipe and the heat storage tank side lower flow pipe;
A hot water replenishment pipe connecting between the first three-way valve and the heat storage tank upper part such that a relatively high temperature circulating fluid on the heat storage tank can be replenished with the first three-way valve; And
And a cold water replenishment pipe connecting the first three-way valve and the bottom of the heat storage tank so that a relatively low temperature circulating fluid in the bottom of the heat storage tank can be replenished with the first three-way valve.
When the amount of circulation of the circulating fluid flowing along the heat storage tank side upper flow pipe and the heat storage tank side lower flow pipe is less than the required circulation amount, the circulating fluid in the heat storage tank passes through at least one of the hot water supplement pipe and the cold water supplement pipe. Geothermal heating and cooling device, characterized in that supplemented with a three-way valve. The method of claim 1,
The geothermal heat exchange member is made of a well type formed therein a well for receiving geothermal heat exchange fluid is exchanged geothermal heat,
The geothermal heating and cooling device
A geothermal auxiliary heat exchanger disposed between the geothermal heat exchange member and the heat pump, wherein the geothermal heat exchange fluid passing through the geothermal heat exchange member and the heat pump circulating fluid via the heat pump exchange heat with each other; And
And a second three-way valve connecting part of said geothermal auxiliary heat exchanger, said heat pump and said demand source.
When cooling is required for the main part of the demand source, and heating is required for a part of the demand source, at least a part of the heat transferred from the heat pump to the geothermal auxiliary heat exchanger is transferred to the part of the demand source. Geothermal heating and cooling device, characterized in that the valve is operated. The method of claim 1,
A customer-side upper flow pipe connecting the heat storage tank upper part and the customer destination so that a circulating fluid having a relatively high temperature flows between the heat storage tank upper part and the demand destination;
A demand-side lower flow pipe connecting the bottom of the heat storage tank and the demand source so that a circulating fluid having a relatively low temperature flows between the bottom of the heat storage tank and the demand destination;
A third three-way valve installed in any one of the demand-side upper flow pipe and the demand-side lower flow pipe; And
And a third three-way valve connecting pipe connecting the third three-way valve and the flow pipe in which the third three-way valve is not installed among the demand-side upper flow pipe and the demand-side lower flow pipe.
A portion of the circulating fluid re-introduced into the heat storage tank is mixed with the circulating fluid flowing out of the heat storage tank toward the demand destination through the third three-way valve connecting pipe, and passes through the demand destination, and then the demand-side upper flow pipe and the demand destination And the third three-way valve is operated such that the temperature of the circulating fluid re-introduced into the heat storage tank through any one of the lower flow pipes can be adjusted to the required heat storage tank inlet temperature. The method of claim 1,
The demand destination is composed of a plurality,
The geothermal heating and cooling device
A customer-side upper flow pipe connecting the heat storage tank upper part and the customer destination so that a circulating fluid having a relatively high temperature flows between the heat storage tank upper part and the demand destination;
A demand-side lower flow pipe connecting the bottom of the heat storage tank and the demand source so that a circulating fluid having a relatively low temperature flows between the bottom of the heat storage tank and the demand destination;
A load supply pump for flowing a circulating fluid from the heat storage tank to the demand destination along the demand-side upper flow pipe and the demand-side lower flow pipe;
A larger diameter than the demand-side upper flow tube and the demand-side lower flow tube, and the demand-side upper flow tube and the demand-side lower flow tube at the end of the plurality of demand sources based on the flow direction of the circulating fluid; A bypass pipe connected at both ends to allow the circulating fluid to bypass the last demand source; And
Including; bypass pipe opening and closing valve for opening and closing the bypass pipe;
In the initial operation of the load supply pump, the rate at which the circulating fluid remaining in the demand-side upper flow pipe and the demand-side lower flow pipe is re-introduced into the heat storage tank may be relatively larger than when the circulating fluid does not pass through the bypass pipe. And the bypass pipe opening / closing valve opens the bypass pipe when the load supply pump is operated. The method of claim 4, wherein
The geothermal heating and cooling device includes a temperature sensor for sensing the temperature of the circulating fluid flowing through the bypass pipe;
And the bypass pipe opening / closing valve closes the bypass pipe when the temperature of the circulating fluid detected by the temperature sensing sensor reaches a required temperature.

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