JP2013228113A - Well hot spring heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a well hot spring heat exchanger capable of efficiently performing heat exchange with water without bringing hot spring water into contact with air.SOLUTION: A well hot spring heat exchanger includes a tubular sealed body inserted toward a spring source, and hot water lift pump disposed in the sealed body to scoop up hot spring water from the spring source via a well to discharge it through a hot water lift pipe to the outside of the sealed body. Heat exchange is performed by double pipes where one of the hot spring water in the hot water lift pipe and water in a water pipe passes through an inner pipe 19-1 and the other passes through an outer pipe 29-1. The device includes means 43 and 45 for enabling turning of at least one of the hot spring water and the water in the pipe on a water supply path.

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 was made paying attention to such a problem, and it aims at providing the well hot spring heat exchange apparatus which can be efficiently heat-exchanged with water, without making hot spring water 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 a well hot spring heat exchange device that exchanges heat with a double pipe through which one of the hot spring water in the hot water pipe and water in the water pipe passes through the inner pipe, and the other passes through the outer pipe,
At least one of the hot spring water or water is swirled by means capable of swirling in the water supply path of the double pipe.
According to this feature, the hot spring water is discharged from the hot water pipe without contact with air from the sealed body, so that precipitates and precipitates are generated in the hot spring water due to the reaction of oxygen and insoluble components in the hot spring water. In addition, it is possible to prevent these deposits and deposits from adhering to the inner peripheral surface of the pipe through which the hot spring water passes at the place where heat is exchanged, and at least one of the hot spring water or water swirls in the pipe. Therefore, heat exchange can be performed efficiently.

Well hot spring heat exchange device of the present invention,
The water supply path of the double pipe is constituted by a substantially S-shaped bent path.
According to this feature, it is possible to secure a heat exchange region in which heat can be effectively exchanged within a predetermined area.

Well hot spring heat exchange device of the present invention,
The outer peripheral surface of the outer pipe is surrounded by a heat insulating material or a heat insulating pipe having a heat insulating material on the inner peripheral surface.
According to this feature, it is possible to prevent the heat exchange efficiency from deteriorating by keeping warm water and hot spring water that have undergone heat exchange even in a place where the outside air temperature is low.

Well hot spring heat exchange device of the present invention,
The water in the water pipe is circulated and fed through a plurality of hot water storage tanks.
According to this feature, it is possible to raise the water temperature to near the hot spring water temperature by circulating and feeding water in the water pipe through the hot water storage tank, and at least one hot water storage tank is used. It becomes possible to respond to the demand for hot water.

It is the schematic which shows the principal part of the well hot spring heat exchange apparatus in an Example. It is detail drawing of the pumping part of a well hot spring heat exchange apparatus. It is a top view of the heat exchange part arrange | positioned in the horizontal direction of a well hot spring heat exchange apparatus, and a related figure of the storage tank part connected with this heat exchange part. It is a schematic side view of the straight part of the heat exchange part arrange | positioned at a horizontal direction. It is the schematic which shows the modification of the well hot spring heat exchange apparatus which arrange | positioned the several hot water tank.

  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. Reference numeral A in FIG. 1 is a source part heated from about 30 ° C. to about 100 ° C. by underground geothermal heat or the like, and hot spring water from the source part A pumped up by the pumping part B is sent to the heat exchanging part C. At the same time, fresh water from the storage tank part D is supplied to the heat exchange part C, and the fresh water subjected to the heat exchange returns to the storage tank part D as warm water.

  The hot water in the storage tank D is circulated through the heat exchanging part C repeatedly, so that the temperature becomes approximately 30 ° C. to 80 ° C. and can be close to the temperature of the hot spring water. The hot spring water that has been subjected to heat exchange can be transported to farms, hot vegetable gardens, or used for snow removal.

  FIG. 2 is a detailed view of a pumping section B for sending the hot spring water 1 from the source section A to the heat exchanging section C, and is a tubular shape inserted into the hot spring well 3 excavated by an excavator or the like toward the source section A. , A hot water pump 7 that pumps hot hot spring water 1 that is disposed in the sealed body 5 and in which sulfur, calcium, silicon, iron, manganese, etc. are dissolved from the source spring A, and a hot spring that is pumped up It is comprised with the pumping-up pipe 9 which supplies the water 1 to the heat exchange part C. FIG.

  The sealing body 5 has a 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 part A, and the hot spring well 3 is located in the hot spring part. A is sealed so as not to touch air. A plurality of hot water outlets 5 a communicating with the inside and the outside of the sealed body 5 are formed at the lower end of the sealed body 5.

  Hot spring water 1 flows into the sealed body 5 through the hot water outlet 5 a, and a hot water pump 7 is disposed in the hot spring water 1 in the sealed body 5. The hot water pump 7 is connected to a hot water pipe 9 extending outward from the sealed body 5, and the hot spring water 1 is fed from the source spring A via the hot water pump 7 by the operation of the hot water pump 7. It can be pumped outward. In addition, at the uppermost end portion of the hot water pipe 9 outside the sealed body 5, the air in the hot water pipe 9 is discharged out of the hot water pipe 9, and the air flows into the hot water pipe 9. An automatic air vent valve 11 is provided to prevent it.

  An air vent device (not shown) provided outside the seal body 5 is connected above the water surface of the hot spring water 1 in the seal body 5, and the air is vented from the seal body 5 by this air vent device. The upper side of the surface of the hot spring water 1 in the body 5 is evacuated to prevent the hot spring water 1 in the sealed body 5 from coming into contact with oxygen in the air.

  Further, at the upper end of the sealed body 5, anaerobic substances not containing oxygen such as hydrogen sulfide and sulfur dioxide generated from the hot spring water 1 in the sealed body 5 are discharged to the outside of the sealed body 5, and the air into the sealed body 5 is discharged. An automatic air vent valve (not shown) is also provided to prevent inflow. For this reason, even if anaerobicity arises from the hot spring water 1 in the sealed body 5, the anaerobic pressure is compressed above the surface of the hot spring water 1 in the sealed body 5 by discharging this anaerobic gas from the automatic air vent valve as needed. You can prevent charging in the state. Further, the hot water pump 7 is always operated by an inverter for 24 hours 365 days so that the water level in the sealed body 5 is kept constant, so that the fluctuation of the internal pressure is reduced to prevent the intrusion of air.

  On the other hand, a branch passage is formed on the downstream side of the hot water pipe 9. One of the branch passages is a pipe 17 for taking out the hot spring water 1 for inspection through the electric valve 13 and the manual valve 15, and the other of the branch paths. The pipe 19 connected to the heat exchanging part C is configured, and the pipe 17 closes the pipe 17 by the motor-operated valve 13 at the normal time when inspection is not required, and the hot spring water 1 is connected to the pipe 19. It passes through the disposed manual valve 21, check valve 23, and manual valve 25, and flows toward the heat exchanging portion C through the telescopic tube 27. And from the check valve 23, the ground surface G.P. The outer peripheral surface of the pipe line 19 which goes out to L and goes to the heat exchanging part C is covered with a heat insulating material 18 such as glass wool or phenol foam.

  Next, a description will be given of a configuration related to the heat exchange part C and the storage tank part D based on FIGS. 3 and 4. The pipe line 19 branched from the hot water pipe 9 includes a thermometer 6 protruding from the heat exchange part C. The inner pipe 19-1 and the expansion joint 41 are connected. In the heat exchanging part C, a double pipe composed of an inner pipe 19-1 and an outer pipe 29-1 is provided. The outer pipe 29-1 has a larger outer diameter than the inner pipe 19-1, and both pipe pipes A space is formed between them.

  Fresh water of about 0 ° C. to 20 ° C. pumped by the circulation pump 33 from the hot water storage tank 31 composed of the casing wrapped with the heat insulating material flows through the water pipe 29, and the water pipe 29 passes through the expansion joint 41 to form the heat exchange section C. Is connected to one end of the outer pipe 29-1, and fresh water flows through a space formed between the inner and outer pipe pipes. The outer circumference of the water pipe 29 is covered with a heat insulating material 18, and an expansion / contraction pipe 30 and a manual valve 32 are appropriately provided.

  The double pipe composed of the inner pipe 19-1 and the outer pipe 29-1 is bent in an S shape as shown in FIG. 3, and secures a heat exchange area where heat can be effectively exchanged within a predetermined area. The hot spring water 1 from the pumping section B enters the first straight section S1 of about 5m to 20m surrounded by the heat insulation pipe 44 from one end and is introduced into the inner pipe 19-1, Through the telescopic tube 39 and the swivel means 43, exits from the other end of the first straight portion S 1, passes through the first bent portion K 1 covered with the heat insulating material 18, and is introduced from one end of the second straight portion S 2. Is done.

  The first bent portion K1 is provided with expansion joints 41 and 41 in the vicinity of the outlet portion at the other end of the first straight portion S1 and in the vicinity of one end inlet portion of the second straight portion S2. The valve 32K1 is provided with a thermometer 6 in the vicinity of one end of the second straight portion S2. The hot spring water 1 introduced from one end of the second straight portion S2 passes through several telescopic pipes 39 and swiveling means 43, exits from the other end of the second straight portion S2, and the first bent portion K1. It is introduced from one end of the third straight portion S3 through the second bent portion K2 covered with the heat insulating material 18 configured similarly and provided with the manual valve 32K2.

  The hot spring water 1 introduced from one end of the third straight portion S3 passes through several expansion tubes 39 and swivel means 43 again, exits from the other end of the third straight portion S3, and is connected by the expansion joint 41. Through the transport pipe 19-2 provided with the thermometer 6 and the manual valve 32 on the downstream side of the expansion joint 41, it is used in a bathing facility such as snow melting or hot spring bath or footbath, and its effective use is achieved.

  On the other hand, fresh water of about 0 ° C. to 20 ° C. pumped from the hot water storage tank 31 by the circulation pump 33 is introduced into the outer pipe 29-1 from the other end side of the third straight portion S3, and several swiveling means 45 and Toward the outer pipe 29-1 in the second straight portion S2 through the expansion joint 42 for the outer pipe, the communication portion R1 connecting the other end of the second straight portion S2 from one end of the third straight portion S3 Flowing. The communication part R1 is provided with a thermometer 6, a manual valve 32R1, and an expansion joint 41.

  The hot spring water 1 introduced from the other end of the second straight portion S2 passes through several swiveling means 45 and the expansion joint 42 for the outer pipe, and passes through the first straight portion S1 from one end of the second straight portion S2. It flows toward the other end of the outer pipe 29-1 in the first straight portion S1 through the communication portion R2 configured in the same manner as the first communication portion R1 that connects the other ends of the first straight portion S1. A manual valve 32R2 and a telescopic joint 41 are provided in the communication portion R2.

  The fresh water introduced from one end of the first straight portion S1 is heat-exchanged by the third and second straight portions S3 and S2 to become high temperature. Further, some swiveling means 45 and the expansion joint 42 for the outer pipe are provided. As a result, the first straight portion S1 is also subjected to heat exchange and becomes higher temperature, and returns to the hot water tank 31 through the return pipe 35 connected by the expansion joint 41 from one end side of the outer pipe 29-1. A manual valve 32 and a thermometer 6 are provided on the expansion pipe 41 side of the return pipe 35.

  And by repeating the circulation from the hot water storage tank 31 of the storage tank part D through the outer pipe 29-1 of the heat exchange part C by the circulation pump 33 and returning again to the hot water storage tank 31, there is a difference depending on the temperature of the source, but from about 30 ° C. Hot water 20 at about 80 ° C. is stored in the hot water tank 31. The hot water storage tank 31 is provided with a thermometer 34 for detecting the temperature of the bottom surface side and the upper surface side of the water tank. The hot water in the water tank is stirred by a stirrer (not shown), and the hot water in the hot water storage tank 31 is kept constant. Yes.

  In the above description, the fresh water to be heat-exchanged is the one stored in the hot water storage tank 31 first, and the heated fresh water (hot water) that has passed through the heat exchange section C by the circulation pump 33 is again used. The process of returning to the hot water tank 31 is repeated so that the temperature of the fresh water in the hot water tank 31 is gradually increased. To obtain hot water in the hot water tank 31 in a short time, as shown in FIG. In addition, if fresh water is introduced into the cold water supply pipe 71 piped on the upper part of the hot water tank 31 and directly joined to the water pipe 29 via the electric valve 77, the heat-exchanged hot water 20 is returned to the hot water tank 31 to store hot water. Good.

  For both the inner pipe 19-1 and the outer pipe 29-1, piping of the most suitable material is selected according to the hot spring quality such as stainless steel, GFRP (glass fiber reinforced plastic), and in particular, the inner pipe 19-1 through which the hot spring water 1 passes. The outer peripheral surface of the outer pipe 29-1 is provided with heat retaining means in consideration of heat loss so that the heat of fresh water heated by heat exchange due to the contact of the outer pipe 29-1 does not escape to the outside.

  That is, the outer peripheral surface of the inner pipe 19-1 at the bent portions K1 and K2 in a relatively short region and the outer peripheral surface of the outer pipe 29-1 at the communication portions R1 and R2 are surrounded by a heat insulating material 18 such as glass wool or phenol foam. As shown in FIG. 4, the heat insulation at the straight portion of each straight portion S1, S2, S3 of about 5m to 20m is carried out by a solid temperature pipe 44 comprising a heat insulation cover 44b having a heat insulation material 44a on the inner surface. The heat retention effect is improved by wrapping the pipe 29-1. Further, the heat insulating material 18 is also applied to the outer peripheral surfaces of the water pipe 29 and the return pipe 35, so that the heat-exchanged hot water and the hot spring water 1 are kept warm even in a place where the outside air temperature is low, thereby preventing a decrease in heat exchange efficiency. be able to.

  The inner pipes 19-1 are connected to each other by an elastic tube 39 that is flexibly connected in the straight portions S1 to S3, and are connected by an elastic joint 41 in the bent portions K1 and K2, and the outer pipe 29 is connected. -1 are connected by the expansion joint 41 in the straight portions S1 to S3, and are connected by the expansion joint 41 in the communication portions R1 and R2, so that the temperature changes in the fluid flowing in both pipes. The expansion and contraction of each inner and outer pipe can be buffered individually. Further, as shown in FIG. 4, the straight portions S1, S2, S3 support the weight by the concrete base 8 embedded in the ground and maintain the horizontality thereof.

  A swiveling means 43 for swirling the hot spring water 1 in the pipe is provided on the downstream side of the inner pipe 19-1 where the telescopic tube 39 is disposed. The swivel means 43 is composed of a plurality of spiral ribs provided at regular intervals in the inner wall circumferential direction of the inner pipe 19-1. When the hot spring water 1 passes through the swivel means 43, a swirl flow is generated, and the inner pipe The temperature of the hot spring water 1 in 19-1 is made uniform. In addition, instead of the spiral rib provided on the inner wall of the pipe, the swirling means may be a water turbine that is rotated by a water flow and that is rotatably mounted in the pipe.

  On the other hand, the outer pipe 29-1 is also provided with swirling means 45 for swirling fresh water circulating in the pipe, and the structure is similar to the swirling means 43 and has a plurality of structures provided at regular intervals in the inner wall circumferential direction. It is composed of spiral ribs. Therefore, a swirling flow is given to the fresh water in the outer pipe 29-1, and the temperature can be made uniform. Thus, since a swirl | flow is given to the hot spring water 1 in the inner pipe 19-1, and the fresh water of the outer pipe 29-1, efficient heat exchange can be aimed at.

  In the storage tank D, the thermometer 34 and the drive unit of the circulation pump 33 are connected to a control device (not shown), and the drive of the circulation pump 33 is stopped on condition that the measured temperature of the thermometer 34 exceeds a certain value. Designed to interrupt the circulation. And since the circulating pump 33 is again driven on condition that the measured temperature of the thermometer 34 falls below a certain value, the temperature of the hot water 20 in the hot water tank 31 is set in the hot water tank 31 in this embodiment. It is possible to maintain a constant temperature. The hot water 20 held at a predetermined temperature in the hot water storage tank 31 is supplied to facilities such as a hot water pool, hot water supply equipment, and the like by a hot water supply pipe 67 provided with a hot water supply pump 65.

  Next, confirmation of leakage of the hot spring water 1 flowing through the inner pipe 19-1 will be described. First, when confirming the leakage of the hot spring water 1 flowing in the inner pipe 19-1 in the straight portion S1, when closing the manual valve 32K1 of the bent portion K1 and closing the manual valve 32R2 of the connecting portion R2, Since there is no hot water flowing in the outer pipe 29-1, if the hot spring water 1 confined in the inner pipe 19-1 in the straight portion S1 leaks and flows out to the outer pipe 29-1, the hot spring water is introduced to the return pipe 35 side. Since 1 flows out, it can be easily confirmed.

  If it can be confirmed that there is no leakage of the hot spring water 1 flowing through the inner pipe 19-1 in the straight portion S 1, the process proceeds to confirmation of the hot spring water 1 in the straight portion S 2. In this case as well, the manual valve 32K2 of the bent portion K2 is closed and the manual valve 32R1 of the connecting portion R1 is closed, so that leakage of the hot spring water 1 confined to the inner pipe 19-1 in the straight portion S2 is returned to the return pipe. It can be confirmed on the 35th side.

  Confirmation of the hot spring water 1 in the straight portion S3 is provided on the transport pipe 19-2 connected to the other end of the third straight portion S3 by the expansion joint 41 while closing the manual valve 32 provided in the water pipe 29. By closing the manual valve 32, the leakage of the hot spring water 1 confined to the inner pipe 19-1 in the straight portion S3 can be confirmed on the return pipe 35 side.

  Next, a hot water supply means that uses a plurality of hot water storage tanks and always maintains a high temperature for a large amount of hot water demand will be described with reference to FIG. Although FIG. 5 demonstrates using three hot water storage tanks, the number of hot water storage tanks can be suitably increased / decreased with consumption.

  On the other side of the water pipe 29 whose one end side is connected to one side of the outer pipe 29-1, fresh water in each of the storage tanks 31-1, 31-2, 31-3 is automatically and alternately operated by the pump 33, respectively. Are connected to the outlet pipes 51-1, 51-2, 51-3 which are pumped up, and an electric valve 53 and a check valve 55 are interposed in each of the outlet pipes 51-1, 51-2, 51-3. ing. Moreover, the other side of the return pipe 35 whose one end side is connected to the other side of the outer pipe 29-1 is an electric motor for returning the warm water 20 into the storage tanks 31-1, 31-2, 31-3, respectively. It connects with introduction pipes 57-1, 57-2, 57-3 provided with a valve 54.

  A manual valve 59 for stopping the flow of the hot water 20 is provided in the return pipe 35, and manual valves 61 and 63 are provided on the upstream side and the downstream side of the return pipe 35 to which the introduction pipe 57-2 is connected. In addition, an electric valve 54 is interposed in each of the introduction pipes 57-1, 57-2, 57-3. These electric valves 53 and 54 can be used in place of electromagnetic valves.

  When only the fresh water in the storage tank 31-1 is circulated and heated, the electric valve 53 of the outlet pipe 51-1 and the manual valve 59 upstream of the return pipe 35 are opened, and the manual valve 61 of the return pipe 35 is opened. The fresh water pumped out of the storage tank 31-1 passes through the lead-out pipe 51-1, the water pipe 29, and the heat exchanging part C by opening the motor-operated valve 54 of the introduction pipe 57-1 and warm water It can be returned to the storage tank 31-1 from the introduction pipe 57-1. In addition, it is possible to select suitably the temperature of the hot water stored in the hot water storage tank 31-1 by adjusting the amount and flow rate of the hot water returned to the hot water storage tank 31-1.

  Similarly, when only the fresh water in the storage tank 31-2 is circulated and heated, the electric valve 53 of the outlet pipe 51-2 is opened and the electric valve 53 of the outlet pipes 51-1 and 51-3 is closed. The manual valves 59 and 61 of the return pipe 35 are opened and the manual valve 63 is closed. Then, by closing the electric valve 54 of the introduction pipe 57-1 and opening the electric valve 54 of the introduction pipe 57-2, a circuit in which fresh water circulates between the storage tank 31-2 and the heat exchange part C is constructed. .

  When only the fresh water in the storage tank 31-3 is circulated and heated, the electric valves 53 of the outlet pipes 51-1 and 51-2 are closed and all the manual valves of the outlet pipe 51-3 and the return pipe 35 are closed. 59, 61, 63 may be opened, and both motor-operated valves 54 of introduction pipes 57-1 and 57-2 may be closed.

  Thus, since the fresh water of each storage tank can be heated independently, for example, while supplying the hot water 20 of the storage tank 31-1 to a demand location, the water level immediately after supplying warm water falls. In the other storage tank 31-3, the cold water introduced through the replenishment valve 73 provided in the cold water replenishment pipe 71 is supplied with the water level of the water level meter provided for each storage tank and the electric introduction valve 75. The remaining storage tank 31-2 can be recirculated through the heat exchange section C and returned again to the hot water storage tank 31-2 to heat the hot water 20, so that the storage tank 31- While 1 is supplying hot water, the storage tank 31-2 warms the warm water, the storage tank 31-3 performs the water supply operation, and each storage tank can be operated continuously while sharing the work, Always maintain a high temperature for a large amount of hot water demand. It is possible to become.

  Each storage tank 31-1, 31-2, 31-3 is connected to a hot water supply pipe 67 provided with a hot water supply pump 65 for supplying the hot water 20 stored in the hot water storage tank to the outside of the hot water storage tank. ing. Furthermore, a stirrer (not shown) that is driven by a motor is provided in each hot water tank, and the hot water in the upper part of the hot water tank heated by the heat exchanging unit C by the driving of the stirrer and the water temperature are relatively low. The temperature in each hot water storage tank 31-1, 31-2, 31-3 is kept constant by stirring the water of the bottom part in a low hot water storage tank.

  The fresh water to be heat-exchanged is first stored in each hot water storage tank, and the heated fresh water (hot water) that has passed through the heat exchange section C by the circulation pump 33 is returned to the hot water tank 31 again. The hot water is gradually heated so that the temperature of the fresh water in the hot water storage tank 31 is increased. To obtain hot water in the hot water storage tank 31 in a short time, as shown in FIG. The cold water supply pipe 71 and the cold water supply pipe 71 are arranged so that fresh water can be introduced into the cold water supply pipe 71 piped above the 31-1, 31-2, 31-3 and directly joined to the water pipe 29 via the motor operated valve 77. Auxiliary chilled water supply pipes 80, 81, 82 connected to the water pipe 29 are provided, the motorized valves 77 arranged in the auxiliary chilled water supply pipes 80, 81, 82 are appropriately opened, and the outlet pipes 51-1, 51-2. The electric valve 53 on the 51-3 side may be closed.

  As described above, the well hot spring heat exchange apparatus according to the present embodiment has the tubular sealed body 5 inserted toward the source, and the hot spring water 1 is pumped from the source by the well, and the hot water pipe 9 is disposed outside the sealed body 5. A hot water pump 7 disposed in the sealed body 5 so as to be discharged via the water, and either one of the hot spring water 1 and the water in the water pipe 29 passes through the inner pipe 19-1, and the other is the outer pipe 29-. Since heat is exchanged by a double pipe passing through 1, at least one of the hot spring water 1 or water is swirled by means 43 or 45 capable of swiveling in the water supply path of the double pipe. The water 1 is discharged from the hot water pipe 9 without coming into contact with the air from the sealed body 5, and it is possible to prevent precipitates and precipitates from being generated in the hot spring water 1 due to the reaction between oxygen and insoluble components in the hot spring water 1. And hot spring water 1 passes through the place where heat is exchanged Since it is possible to avoid the deposits and deposits from adhering to the inner peripheral surface of the pipe, the hot spring water 1 or at least one of the water is sent while being swirled by means 43 or 45 capable of swirling in the pipe. Heat exchange can be performed efficiently.

  In addition, since the water supply path of the double pipe is configured by a substantially S-shaped bent path, a heat exchange region capable of effectively exchanging heat within a predetermined area can be secured.

  Further, the outer peripheral surface of the outer pipe is surrounded by the heat insulating material or the heat insulating pipe having the heat insulating material on the inner peripheral surface, so that the hot water 20 and the hot spring water 1 that are heat-exchanged are kept warm even in a place where the outside air temperature is low. Therefore, it is possible to prevent a decrease in heat exchange efficiency.

  Further, the water in the water pipe 29 in the double pipe is circulated and fed through a plurality of hot water storage tanks 31-1, 31-2 and 31-3, so that the water in the water pipe is circulated and fed through the hot water tank. By operating, it is possible to raise the water temperature to near the hot spring water temperature, and by using at least one hot water storage tank, it is possible to meet the demand for a large amount of hot water.

  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-described embodiment, hot water is supplied to the inner pipe 19-1, and fresh water is supplied to the outer pipe 29-1, but conversely, fresh water is supplied to the inner pipe and hot water is supplied to the outer pipe. It doesn't matter. Furthermore, the swirling flow may be applied only to one of fresh water or hot spring water.

  In each storage tank, it has been described that independent operations such as supply of hot water, warming of warm water, and replenishment of water are sequentially performed, but depending on the purpose of use, a plurality of storage tanks may simultaneously perform the same operation. It doesn't matter. Furthermore, the number and arrangement of the swiveling means 43 and 45, or the expansion and contraction pipes 39 and the expansion and contraction joints 41 and 42 are appropriately set according to conditions such as the temperature of the hot spring water and the length of the heat exchange section C.

1 Hot spring water 5 Sealed body
7 Hot water pump 9 Hot water pipe 19-1 Inner pipe 29-1 Outer pipe
20 Hot water 29 Water pipe
31 Hot water storage tank 39 Telescopic pipes 41, 42 Telescopic joints 43, 45 Turning means
A Hot spring part B Pumping part C Heat exchange part D Storage tank part GL Ground surface

Claims (4)

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 a well hot spring heat exchange device that exchanges heat with a double pipe through which one of the hot spring water in the hot water pipe and water in the water pipe passes through the inner pipe, and the other passes through the outer pipe,
At least one of the hot spring water or water is swirled by means capable of swirling in the water supply path of the double pipe.   The well hot spring heat exchanger according to claim 1, wherein the water supply path of the double pipe is configured by a substantially S-shaped bent path.   The well hot spring heat exchanger according to claim 1 or 2, wherein the outer peripheral surface of the outer pipe is surrounded by a heat insulating material or a heat insulating pipe having a heat insulating material on the inner peripheral surface.   The well hot spring heat exchanger according to any one of claims 1 to 3, wherein the water in the water pipe is circulated and supplied through a plurality of hot water storage tanks.

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