JP5480796B2 - Well hot spring heat exchanger - Google Patents

Description

  The present invention includes a tubular sealed body inserted toward a source, and a hot water pump disposed in the sealed body so as to pump hot spring water from the source and discharge the hot spring water to the outside of the sealed body through a hot water pipe. , And a well hot spring heat exchange device that exchanges heat between hot spring water in the hot water pipe and water in the water pipe.

  Conventionally, a circulation pipe (hot water pipe) that circulates source water (hot spring water) that has springed between the source tank and the first pump, and general water (water) between the primary water tank and the second pump. There is a hot spring heat recovery device (well hot spring heat exchange device) including a circulation pipe (water pipe) to be circulated and a heat exchanger that exchanges heat between source water and general water in the circulation pipe (for example, , See Patent Document 1).

JP-A-9-14750 (page 3, FIG. 1)

  However, in the well hot spring heat exchange device described in Patent Document 1, since the insoluble components in the spring water source (hot spring water) that has springed out are precipitated and precipitated by reacting with oxygen in the air, the source tank There is a problem that the deposits and deposits of these insoluble components adhere to the inner surface and the inner peripheral surface of the circulation pipe (the hot water pipe and the heat exchanger), thereby blocking the flow of the source water.

  This invention is made paying attention to such a problem, and it aims at providing the well hot spring heat exchange apparatus which can heat-exchange hot spring water with water, without making it contact with air.

In order to solve the above problems, the well hot spring heat exchange device of the present invention is
A tubular sealed body inserted toward the source, and a hot water pump disposed in the sealed body so as to pump hot spring water from the source through a well and discharge it outside the sealed body through a hot water pipe And comprising
A well hot spring heat exchange device for exchanging heat between the hot spring water in the hot water pipe and the water in the water pipe,
An air vent for discharging air from the sealed body to the upper end of the sealed body, and a top of the hot water pipe for discharging air from the hot water pipe and preventing air from flowing into the hot water pipe. 1 an automatic air vent valve, and an on-off valve that opens and closes the hot water pipe through which the hot spring water after heat exchange flows, and further includes a branch pipe that branches from the hot water pipe, The hot spring water and the hot spring water in the branch pipe are heat-exchanged with the water so as to have different temperatures .
According to this feature, the air in the sealed body is discharged by the air venting device, and the hot water in the hot water pump is pushed out from the first automatic air vent valve by the hot spring water at the initial operation of the hot water pump. After filling, the hot spring water pumped from the source in both the sealed body and the hot water pipe is prevented from coming into contact with oxygen-containing air, and oxygen and the insoluble components in the hot spring water react. Since it is possible to prevent deposits and deposits from forming in the hot spring water, it is possible to prevent the deposits and deposits from adhering to the inner peripheral surface of the hot water pipe, and when the hot water pump is stopped. By closing the on-off valve, the space between the hot water pump and the on-off valve in the hot water pipe is maintained in a state filled with hot spring water that does not have air, and is deposited at the location where heat is exchanged with the water pipe. Prevents deposits and deposits Door can be. Moreover, the hot spring water in the hot water pipe and the hot spring water in the branch pipe can be divided into a plurality of uses having different appropriate temperatures.

Well hot spring heat exchange device of the present invention,
The upper end portion of the sealed body is provided with a second automatic air vent valve that discharges anaerobic gas generated from the hot spring water from the sealed body and prevents air from flowing into the sealed body.
According to this feature, since anaerobic does not accumulate at the upper end of the sealed body, the assembly efficiency of the hot spring water of the hot water pump is reduced by the force that anaerobic pushes the surface of the hot spring water downward. Can be prevented.

Well hot spring heat exchange device of the present invention,
The hot water pipe before heat exchange is provided with a third automatic air vent valve for preventing the inflow of air to the upstream side of the hot water pipe.
According to this feature, even if pumping of the hot spring water by the hot water pump is stopped due to maintenance or the like, the hot water in the hot water pipe between the hot water pump and the third automatic air vent valve does not have air. It is possible to suppress the occurrence of precipitates and deposits in the hot spring water until the hot spring water is pumped up again by the hot water pump.

It is the schematic which shows the well hot spring heat exchange apparatus in an Example. It is the schematic which shows the well hot spring heat exchange apparatus as the 1st modification of an Example. It is the schematic which shows the well hot spring heat exchange apparatus as a 2nd modification of an Example.

  EMBODIMENT OF THE INVENTION The form for implementing the well hot spring heat exchange apparatus which concerns on this invention is demonstrated below based on an Example.

  The well hot spring heat exchanger according to the embodiment will be described with reference to FIG. The code | symbol 1 of FIG. 1 is the well hot spring heat exchange apparatus of this invention. As shown in FIG. 1, this well hot spring heat exchange device 1 is a tube inserted into a hot spring well 3 excavated by an excavator or the like toward a source spring 2 heated to about 100 degrees by geothermal heat of underground G or the like. A sealed body 4, a hot water pump 6 that pumps hot hot water 5 in which sulfur, calcium, silicon, iron, manganese, etc. are dissolved from the source 2 disposed in the sealed body 4, and room temperature such as clean water A hot water storage tank 7 for storing the hot water 18 as hot water 18, and a heat exchanger 8 for exchanging heat between the hot spring water 5 pumped up by the hot water pump 6 and the hot water 18 stored in the hot water storage tank 7. It is configured.

  Among these, the sealing body 4 has a long vertical dimension of about 1000 meters in the present embodiment, and is inserted into the hot spring well 3 to place the lower end in the hot spring 2, and the hot spring well 3 is the source spring. 2 is sealed to prevent contact with air. A plurality of hot water outlets 4 a communicating with the inside and the outside of the sealing body 4 are formed at the lower end of the sealing body 4.

  For this reason, hot spring water 5 flows into the sealed body 4 via the hot water outlet 4 a, and a hot water pump 6 is disposed in the hot spring water 5 in the sealed body 4. The hot water pump 6 is connected to a hot water pipe 9 extending outward from the sealed body 4, and the hot spring water 5 is extracted from the source 2 through the hot water pump 6 by the operation of the hot water pump 6. It is possible to pump up. In addition, at the uppermost end portion of the hot water pipe 9 outside the sealed body 4, the air in the hot water pipe 9 is discharged to the outside of the hot water pipe 9 and the inflow of air into the hot water pipe 9 is prevented. A first automatic air vent valve 10 is provided to prevent it.

  An air vent device 11 provided outside the sealed body 4 is connected above the water surface of the hot spring water 5 in the sealed body 4. This air venting device 11 evacuates air from the inside of the sealed body 4 to make a vacuum above the surface of the hot spring water 5 in the sealed body 4 so that the hot spring water 5 in the sealed body 4 comes into contact with oxygen in the air. To prevent that.

  Further, at the upper end of the sealed body 4, anaerobic substances that do not contain oxygen such as hydrogen sulfide and sulfur dioxide generated from the hot spring water 5 in the sealed body 4 are discharged to the outside of the sealed body 4, and the air into the sealed body 4 is discharged. A second automatic air vent valve 12 is provided to prevent the inflow of air. For this reason, even if anaerobicity is generated from the hot spring water 5 in the sealed body 4, the anaerobic gas is discharged from the second automatic air vent valve 12 at any time so that the anaerobic atmosphere is generated above the surface of the hot spring water 5 in the sealed body 4. It is possible to prevent charging in a compressed state.

  On the other hand, on the downstream side of the first automatic air vent valve 10 in the hot water pipe 9, the hot spring water 5 pumped by the hot water pump 6 flows toward the downstream side and from the downstream side of the hot water pipe 9 to the upstream side. A third automatic air vent valve 13 for preventing air from flowing in is provided. For this reason, the space between the hot water pump 6 and the third automatic air vent valve 13 in the hot water pipe 9 is always filled with the hot spring water 5 after the air is discharged from the first automatic air vent valve 10.

  A branch pipe 14 branches from the hot water pipe 9 from the downstream side of the third automatic air vent valve 13 in the hot water pipe 9. Further, the hot water pipe 9 is inserted into the heat exchanger 8 on the downstream side of the portion where the branch pipe 14 is branched. The heat exchanger 8 is a casing wrapped with a heat insulating material such as glass wool or phenol foam, and the hot water pipe 9 disposed in the heat exchanger 8 is formed in a ninety-nine fold shape. The heat of the hot spring water 5 is radiated in the heat exchanger 8.

  Further, an on-off valve 15 for opening and closing the hot water pipe 9 is provided on the downstream side of the heat exchanger 8 in the hot water pipe 9 from the location where the heat of the hot spring water 5 is radiated. On the other hand, the branch pipe 14 is also provided with an open / close valve 16 for opening and closing the branch pipe 14, and the branch pipe 14 joins the hot water supply pipe 9 on the downstream side of the open / close valve 15. Note that the on-off valve 16 of the branch pipe 14 is normally closed, and is opened only when adjusting the flow rate of the hot spring water 5 flowing through the hot-water pipe 9 or during maintenance of the heat exchanger 8.

  Then, the hot-water pipe 9 joined with the branch pipe 14 is used to heat the hot spring water whose temperature has been lowered by radiating heat in the heat exchanger 8 to finally melt the snow into a bathing facility such as a hot spring bath or footbath, or a public road. Used for purposes such as sprinkling water.

  The hot water tank 7 is a case wrapped with a heat insulating material such as class wool or phenol foam like the heat exchanger 8, and hot water 18 is supplied to the inside by the water pipe 17 as the water level in the hot water tank 7 decreases. It has come to be. Further, a hot water supply pipe 19 provided with a hot water supply pump 20 for supplying hot water 18 stored in the hot water storage tank 7 to the outside of the hot water storage tank 7 is connected to the hot water storage tank 7.

  Furthermore, one end of a loop pipe 21 as a water pipe in the present invention is connected to the bottom of the hot water tank 7 and the other end is connected to the upper part of the hot water tank 7. The loop pipe 21 is provided with an on-off valve 22 for opening and closing the loop pipe 21 and a circulation pump 23 for sucking water from the bottom of the hot water tank 7, and the water in the hot water tank 7 circulates from the water near the bottom. It is sucked into the loop pipe 21 by the pump 23 and discharged to the upper part in the hot water tank 7 through the heat exchanger 8. Note that the downstream side of the on-off valve 22 and the circulation pump 23 of the loop pipe 21 is inserted into the heat exchanger 8 and circulated.

  The place arranged in the heat exchanger 8 in the loop pipe 21 is arranged in the vicinity of the hot water pipe 9 in the heat exchanger 8 and is formed in ninety-nine folds along the hot water pipe 9. Has been. For this reason, the water flowing in the loop pipe 21 is circulated through the loop pipe 21 through the heat of the hot spring water 5 emitted from the hot water pump pipe 9 in the heat exchanger 8. The water temperature rises by receiving heat to near and is discharged into the hot water tank 7 in a state where the water temperature becomes 18. That is, heat exchange between the hot spring water 5 and the hot water 18 is performed in the heat exchanger 8.

  In addition, a stirrer 25 driven by a motor 24 is provided in the hot water storage tank 7, and hot water 18 in the upper part of the hot water storage tank 7 heated in the heat exchanger 8 by driving of the stirrer 25, The water in the bottom of the hot water storage tank 7 is agitated to keep the water temperature in the hot water storage tank 7 constant. The hot water 18 that has been subjected to heat exchange is used for watering for melting snow on public roads in addition to facilities such as a bath, shower, hot water pool, etc. from the hot water tank 7 through the hot water pipe 19 by driving the hot water pump 20. Hot water is supplied for use.

  Although not particularly shown, in this embodiment, a water temperature gauge that constantly measures the temperature of the hot water 18 in the hot water tank 7 is provided in the hot water tank 7, and the water temperature gauge and the on-off valve 22 are provided outside the hot water tank 7. A control device to be connected is provided. The control device closes the on-off valve 22 on the condition that the measured temperature of the water temperature meter exceeds a certain value, and on the condition that the measured temperature of the water temperature meter falls below the certain value. The on-off valve 22 is opened again. For this reason, in the hot water storage tank 7 in a present Example, it is possible to maintain the water temperature of the hot water 18 in the hot water storage tank 7 at a fixed temperature.

  Furthermore, in this embodiment, by connecting the hot water tank 17 and the loop pipe 21 inserted through the heat exchanger 8 to the hot water storage tank 7, heat exchange between the hot spring water 5 and the hot water 18 is performed. Although the water temperature of the hot water 18 was adjusted, a plurality of hot water storage tanks 7 were provided, and the hot water pipes 17 and the loop pipes 21 inserted into the heat exchanger 8 were connected to the respective hot water storage tanks 7. The inflow amount of the hot water 18 from the surface water pipe 17 and the opening / closing of the on-off valve 22 may be controlled. With this configuration, whenever the hot water 18 in a certain hot water tank 7 is used up, the hot water 18 in another hot water tank 7 is switched so that it can be used via the hot water supply pipe 19, and the empty hot water tank 7 Hot water 18 can be supplied to the hot water supply pipe 19 without interruption by allowing the hot water 18 to flow in again from the water pipe 17 to perform heat exchange. Furthermore, the hot spring water 5 and the hot water 18 are efficiently exchanged for 24 hours by inverter control without stopping the hot water pump 6, and the hot water 18 subjected to the heat exchange is used as a bath, a shower, or a hot water pool. It can be used in such facilities.

  As described above, in the well hot spring heat exchange device 1 according to the present embodiment, the air vent device 11 that discharges air from the inside of the sealed body 4 to the upper end portion of the sealed body 4 and the hot water pipe at the top of the hot water pipe 9. A first automatic air vent valve 10 that discharges air from the inside 9 and prevents air from flowing into the hot water pipe 9; an open / close valve 15 that opens and closes the hot water pipe 9 through which the hot spring water 5 flows at least after heat exchange; The air vent device 11 discharges the air in the sealed body 4 and pushes the air in the hot water pipe 9 from the first automatic air vent valve 10 by the hot spring water 5 at the initial operation of the hot water pump 6. After the hot water pipe 9 is filled with the hot spring water 5, the hot spring water 5 pumped from the source 2 in both the sealed body 4 and the hot water pipe 9 is prevented from coming into contact with oxygen-containing air. , Oxygen and insoluble components in hot spring water 5 react to warm Since it is possible to prevent the formation of precipitates / precipitates in the water 5, it is possible to prevent the deposits / precipitates from adhering to the inner peripheral surface of the hot water pipe 9, and the hot water pump 6 is stopped. In this case, the on-off valves 15 and 16 are closed to maintain the hot water pump 6 and the on-off valves 15 and 16 in the hot water pipe 9 in a state filled with the hot spring water 5 in which no air exists. In addition, it is possible to prevent deposits and deposits from adhering at locations where heat is exchanged with the water pipe 17.

  In addition, a second automatic air vent valve 12 is provided at the upper end of the sealed body 4 to discharge anaerobic gas generated from the hot spring water 5 from the sealed body 4 and prevent air from flowing into the sealed body 4. Thereby, since anaerobic does not accumulate in the upper end part in the airtight body 4, the assembly efficiency of the hot spring water 5 of the hot water pump 6 falls by the force which anaerobic pushes the water surface of the hot spring water 5 downward. Can be prevented.

  Moreover, since the third automatic air vent valve 13 for preventing the inflow of air to the upstream side of the hot water pipe 9 is provided in the hot water pipe 9 before heat exchange, the hot water 5 of the hot water pump 6 is used. Even when the pumping is stopped due to maintenance or the like, the inside of the hot water pipe 9 between the hot water pump 6 and the third automatic air vent valve 13 is maintained in a state filled with hot spring water 5 in which no air exists. Until the pumping of the hot spring water 5 by the hot water pump 6 is resumed, it is possible to suppress the generation of precipitates and precipitates in the hot spring water 5.

  Next, a first modification of the embodiment will be described with reference to FIG. In addition, the same structure as the said Example and the overlapping structure are abbreviate | omitted. As shown in FIG. 2, in the well hot spring heat exchange device 1 ′ in the present embodiment, the heat exchanger 8 is arranged at the bottom of the hot water tank 7, and the hot water pipe 9 includes the heat exchanger 8 and the hot water tank. 7 is inserted through both.

  One end of the loop pipe 21 is connected to the upper part in the hot water tank 7, and the other end of the loop pipe 21 is arranged in the hot water tank 7 on the downstream side of the heat exchanger 8. . For this reason, while the water in the upper part in the hot water tank 7 is sucked in by the circulation pump 23, the hot water 18 whose water temperature has risen in the heat exchanger 8 arranged in the hot water tank 7 is fed from the other end of the loop pipe 21. Released.

  That is, in this embodiment, the hot water 18 heated by heat exchange with the hot spring water 5 in the heat exchanger 8 can be discharged into the hot water tank 7 without loss of heat energy.

  Next, a second modification of the embodiment will be described with reference to FIG. It should be noted that the same components as those shown in the above-described embodiment are denoted by the same reference numerals and redundant description is omitted. In the well hot spring heat exchanger 1 ″ according to the present embodiment, a branch pipe 14 is branched downstream from the third automatic air vent valve 13 in the hot water pipe 9. The branch pipe 14 is extended by a predetermined distance in parallel with the hot water pipe 9, and the water guide pipe 9 is connected to a hot water storage tank 26 for storing the hot spring water 5 at a proper temperature for use at all times by operating a valve.

  Further, the hot water pipe 9 and the branch pipe 14 are inserted into a heat exchanger 27. The heat exchanger 27 in the present embodiment is a housing for storing hot water 18, and a water pipe 17 is connected to the heat exchanger 27. Hot water 18 is supplied to the inside by the water pipe 17. Furthermore, the heat exchanger 27 has a sufficient length so that the hot water 18 stored therein is sufficiently heat-exchanged with the hot spring water 5 in the hot water pipe 9 and the branch pipe 14 and heated to a constant water temperature. A hot water supply pipe 28 provided with an on-off valve 29 for supplying the sufficiently heated hot water 18 to the outside of the heat exchanger 27 is connected.

  For this reason, the hot water 18 is in direct contact with the hot water pipe 9 and the branch pipe 14 in the heat exchanger 27, and the hot water 18 in the heat exchanger 27 heats the hot spring water 5 only through the hot water pipe 9. Since it can receive, the temperature of the hot water 18 can be raised efficiently while the temperature of the hot spring water 5 can be reduced efficiently.

  An on-off valve 30 is provided on the upstream side of the place where the hot water pipe 9 is disposed in the heat exchanger 27, and from the place where the hot water pipe 9 is disposed in the heat exchanger 27. On the downstream side, an on-off valve 31 is provided. Similarly, an on-off valve 32 is provided on the upstream side of the location where the branch pipe 14 is disposed in the heat exchanger 27, and more than the location where the branch pipe 14 is disposed within the heat exchanger 27. On the downstream side, an on-off valve 33 is provided.

  By adjusting the opening degree of these on-off valves 30, 31, 32, 33, the flow rate of the hot spring water 5 flowing through the hot water pipe 9 and the branch pipe 14 is adjusted, and the heat exchanger 27 receives heat from the hot spring water 5. The temperature of the hot water 18 can be adjusted as appropriate.

  In particular, in the present embodiment, the on-off valves 30 and 31 are not fully opened, and the flow rate of the hot spring water 5 in the hot water pipe 9 in the heat exchanger 27 is low. For this reason, the hot spring water 5 in the hot water pipe 9 is exchanged in the heat exchanger 27 with water flowing into the heat exchanger 27 from the surface water pipe 17 by opening a predetermined amount of the on-off valve 29. Heat exchange takes place over a sufficient amount of time. By this heat exchange, the hot spring water 5 is stored in the hot water storage tank 26 in a state where the water temperature is relatively low at around 45 degrees. The hot water 18 that has been heat-exchanged with the hot spring water 5 in the heat exchanger 27 is supplied via a hot water supply pipe 28 to a hot water supply tank (not shown) provided in a facility such as a bath, a shower, or a hot water pool. It has become.

  On the other hand, the on-off valves 32 and 33 are opened to substantially fully open, and the flow rate of the hot spring water 5 in the branch pipe 14 in the heat exchanger 27 is high. For this reason, the hot spring water 5 in the branch pipe 14 is heat-exchanged with the hot water 18 in the heat exchanger 27 without taking much time, and is supplied to a hot spring bath or the like at a relatively high water temperature of 60. It has come to be.

  The well hot spring heat exchange device 1 ″ according to the present embodiment includes a compressor 34 for blowing air to the hot spring water 5 stored in the hot water storage tank 26. Blower pipes 35 and 36 are connected to the compressor 34.

  Among these, the blower pipe 35 is inserted into the heat exchanger 27 and extends toward the hot water storage tank 26, and the blower pipe 35 is located closer to the compressor 34 than the portion disposed in the heat exchanger 27. An on-off valve 37 that can be opened and closed is provided. On the other hand, the blower pipe 36 extends outward from the heat exchanger 27 toward the hot water storage tank 7 and is provided with an on-off valve 38 on the way. These blower pipes 35 and 36 are connected to the hot water storage tank. 26 is connected to the hot water storage tank 26 in a state of being merged in the vicinity of the hot water tank 26.

  In this way, by connecting the compressor 34 to the hot water storage tank 26 via the blower pipes 35 and 36, the hot spring in the hot water storage tank 26 in which the compressed air generated in the compressor 34 flows in the blower pipe 35 or the blower pipe 36. The water 5 can be sprayed.

  The hot spring water in the hot water storage tank 26 in contact with the compressed air reacts with oxygen in the air to generate insoluble components as precipitates / precipitates, and these precipitates / precipitates are formed at the bottom of the hot water storage tank 26. Precipitate.

  That is, the hot water storage tank 26 in this embodiment functions as a sedimentation tank for precipitating deposits / precipitates at the bottom. Then, by supplying the hot spring water 5 in which the insoluble components are sufficiently precipitated in the hot water storage tank 26 as a bathing facility such as a footbath or snow melting water, the deposits and deposits are formed in the piping in the bathing facility. Prevents adhesion.

  The compressed air blown to the hot spring water 5 in the hot water storage tank 26 can pass through one of the blow pipes 35 and 36 by opening and closing the on-off valves 37 and 38 described above. . Specifically, in the summer when the outside air temperature is high, the open / close valve 38 is opened and the compressed air flowing through the blower pipe 36 is blown to the hot spring water 5 in the hot water storage tank 26, and in the winter when the outside air temperature is low, the heat exchanger By opening the on-off valve 37 so that the compressed air flows through the blower pipe 35 side inserted into the hot water pipe 27, the hot compressed air is blown to the hot spring water 5 in the hot water storage tank 26, and the hot spring water 5 is efficiently deposited. Things / precipitates can be precipitated in the hot water tank 7.

  As described above, the well hot spring heat exchanging device 1 ″ in the present embodiment further includes the branch pipe 14 branched from the hot water pipe 9, and the hot spring water 5 in the hot water pipe 9 and the hot spring water in the branch pipe 14. 5 is heat-exchanged with the hot water 18 so that the temperatures thereof are different from each other. Therefore, the hot spring water 5 in the hot water pipe 9 and the hot spring water 5 in the branch pipe 14 are each operated by a valve operation (not shown). It can be used separately for different purposes.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, the hot spring water 5 and the hot water 18 are heat-exchanged by arranging the hot-water pipe 9 and the loop pipe 21 in the heat exchanger 8 close to each other. You may make it raise the heat exchange efficiency of 5 and the warm water 18. FIG.

  In the embodiment, the hot water pipe 9 and the branch pipe 14 are inserted into the heat exchanger 27 and the hot water 18 in the heat exchanger 27 and the hot spring water in the hot water pipe 9 and the branch pipe 14 are inserted. However, a part of one of the hot water pipe 9 and the branch pipe 14 is formed in a large diameter to form a heat exchanger, and several water water pipes 17 are provided in the heat exchanger. By inserting, hot water having different temperatures may be generated by valve operation.

1,1 ', 1''Well hot spring heat exchange device 2 Source 3 Hot spring well 4 Sealed body 5 Hot spring water 6 Hot water pump 8 Heat exchanger 9 Hot water pipe 10 First automatic air vent valve 11 Air vent device 12 Second automatic air vent Valve 13 Third automatic venting valve 15, 16 On-off valve 18 Hot water 20 Hot water supply pump 21 Loop pipe (water pipe)
27 Heat exchanger 30, 31 On-off valve 32, 33 On-off valve G Underground

Claims (3)

A tubular sealed body inserted toward the source, and a hot water pump disposed in the sealed body so as to pump hot spring water from the source through a well and discharge it outside the sealed body through a hot water pipe And comprising
A well hot spring heat exchange device for exchanging heat between the hot spring water in the hot water pipe and the water in the water pipe,
An air vent for discharging air from the sealed body to the upper end of the sealed body, and a top of the hot water pipe for discharging air from the hot water pipe and preventing air from flowing into the hot water pipe. 1 an automatic air vent valve, and an on-off valve that opens and closes the hot water pipe through which the hot spring water after heat exchange flows, and further includes a branch pipe that branches from the hot water pipe, The hot spring water and the hot spring water in the branch pipe are subjected to heat exchange with the water so that the temperatures thereof are different from each other .   The upper end of the sealed body is provided with a second automatic air vent valve that discharges anaerobic gas generated from the hot spring water from the sealed body and prevents air from flowing into the sealed body. Item 1. The well hot spring heat exchange device according to item 1.   The well according to claim 1 or 2, wherein the hot water pipe before heat exchange is provided with a third automatic air vent valve that prevents inflow of air to the upstream side of the hot water pipe. Hot spring heat exchanger.

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