JP2013079748A - Method of installing heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install a heat exchanger body without changing a layout pattern of a heat exchanging tube.SOLUTION: On the ground, a heat exchanging tube 12 wound into a coil is shifted in a direction along a coil surface and extended to form a winding part 16 including an array of continuous loops 18. The heat exchanging tuber 12 connected to the winding part 16 is extended along an arrangement direction of the loop 18 to form a linear part 20. The loops 18 of the winding part 16 and the linear part 20 arranged under the loop 18 are connected by a retainer 26. The loops 18 constitute a positioned heat exchanger body 14. The heat exchanger body 14 is installed in a groove 32 with a loop surface of the loop 18 erected, to fill the groove 32.

Description

  The present invention relates to a method for installing a heat exchanger that constitutes a geothermal heat pump system and is buried in the ground.

  A geothermal heat pump system using geothermal heat has attracted attention from the viewpoint of energy saving and low environmental load. Such a geothermal heat pump system circulates a heat medium such as water, glycol or alcohol in a heat exchanger consisting of a heat exchange pipe buried in the ground, and exchanges this heat medium in the ground. By doing so, it takes heat from the ground and releases heat into the ground.

  Conventionally, a vertical burying method in which a heat exchanger is installed by excavating in the vertical direction at a depth of several tens to several hundreds of meters has been performed, but since the excavation cost is expensive, about 1 m to 3 m A horizontal burying method in which a heat exchanger is horizontally arranged by excavating in a flat shape at a depth of 5 mm is being studied. For example, in the horizontal burying method, a heat exchanger arranges a heat exchange pipe made of a resin pipe having flexibility in a predetermined pattern in a hole excavated at a required width and depth, and arranges the heat exchange pipe. It is installed in the ground by backfilling so as not to break the pattern. Here, since the heat exchange pipe is provided in a coiled state, the loops of the heat exchange pipe wound in the coil shape are spread so as to be shifted in order, and the loops of the heat exchange pipes are partly connected to each other. Arrangement patterns arranged so as to overlap each other are often employed because the heat exchange pipe can be efficiently laid. However, the diameter of each loop of the heat exchange pipe varies depending on the degree of curl in the coil state, and the strength and return amount of the curl also changes depending on the outside air temperature during construction. The length is affected by the time of construction and the contractor. If there are variations in the arrangement pattern and length of the heat exchange tubes, the required heat exchange efficiency cannot be ensured in the ground, and the underground heat pump system may not exhibit the desired performance.

  Therefore, the heat exchanger disclosed in Patent Document 1 is provided with an identification portion provided at a predetermined interval on the tube, and is fixed after the tube is aligned with a plurality of grooves provided on the nozzle so that the identification portion is linear. A plurality of loops continuing the tube are arranged in a direction substantially parallel to the loop surface. Thus, the heat exchanger of patent document 1 keeps the arrangement | positioning pattern and length of a heat exchange pipe | tube constant by fixing a pipe | tube with a nozzle. Patent Document 1 also proposes another heat exchanger that supports a pipe by sandwiching an identification portion provided on the pipe at a predetermined position with a sheet-like fixing member from above and below.

JP 2010-185599 A

  The heat exchanger of Patent Document 1 can set the loop pitch of the tube only within the range of the interval of the groove portion provided in the nozzle, and is not easy to use because it cannot be a flexible tube arrangement pattern according to the site. Is bad. In addition, since the nozzle is long and has a structure capable of supporting the pipe, it is bulky and difficult to handle in transportation and installation work. In another heat exchanger disclosed in Patent Document 1, if the pipe is sandwiched and fixed by a sheet-like fixing member, the pipe cannot be replaced, so that the flexibility of construction is impaired, and this is also easy to use. bad.

  That is, the present invention has been proposed in order to suitably solve these problems inherent in the conventional method for installing a heat exchanger, and is simple in installation work and desired heat exchange efficiency. It aims at providing the installation method of the heat exchanger from which is obtained.

In order to overcome the above-mentioned problems and achieve the intended purpose, the heat exchanger installation method of the invention according to claim 1 of the present application comprises:
An installation method of a heat exchanger that is used in a geothermal heat pump system and buried in the ground,
On the ground, the heat exchange tube wound in a coil shape is shifted and extended in the direction along the coil surface to form a winding portion in which a plurality of continuous loops are arranged, and is connected to one end of the winding portion in the arrangement direction of the loops. A linear portion is formed by extending the heat exchange tube along the arrangement direction so as to pass the upper side or the lower side of the loop in a posture in which the loop surface is raised toward the other end of the loop in the arrangement direction of the loop. And
The heat exchange pipe constituting the loop and the heat exchange pipe constituting the linear portion are connected by a holder to form a heat exchanger body in which the loop is positioned, and the heat exchanger body is embedded. The summary is as follows.
According to the invention which concerns on Claim 1, the space | interval adjustment of the loop by a holder can be performed flexibly and easily by changing the position connected with the linear part of a holder. And since the loop of a winding part is appropriately aligned with a holder, the obtained heat exchanger can realize heat exchange as designed. In addition, since the heat exchange pipe constituting the loop of the winding part and the heat exchange pipe constituting the linear part are connected by a holder, the presence of the holder causes the direction of the loop in the heat exchange pipe body to be orthogonal to the direction of the loop. For example, when the heat exchanger main body is installed in the groove, the installation work can be easily performed without increasing the amount of excavated soil and excavating labor.

In the invention according to claim 2, the heat exchanger body is installed in a position where the loop surface of the loop is raised in a groove excavated to a size capable of accommodating the heat exchanger body, and the groove is refilled. This is the gist.
According to the second aspect of the present invention, even when the heat exchanger body is changed to a posture in which the loop surface is raised, the loop of the winding portion is appropriately held by the holder, so that the loop is not displaced. In addition, the width of the heat exchange pipe body in the direction perpendicular to the loop arrangement direction does not increase due to the presence of the holder, and the installation work can be easily performed without increasing the amount of excavated soil and labor of the groove. .

The gist of the invention according to claim 3 is that the heat exchanger main body is inserted into the groove from the linear portion side, and the heat exchanger main body is installed in the groove with the linear portion on the lower side. .
According to the third aspect of the present invention, the heat exchange pipe constituting the loop of the winding part and the heat exchange pipe constituting the linear part are connected by the holder, and therefore inserted into the groove from the linear part side. Thus, it is possible to prevent the space between the loops from spreading and the winding part from being caught on the wall surface of the groove. Moreover, since the linear part side becomes comparatively heavy, the heat exchanger main body is easy to insert in a groove | channel, and to position in a groove | channel easily.

The invention according to claim 4 is characterized in that the heat exchanger body is formed before completion of excavation of the groove.
According to the invention of claim 4, since the heat exchanger body can be installed in the groove as soon as the excavation of the groove is completed, it is difficult to be affected by the collapse of the groove.

  According to the installation method of the heat exchanger which concerns on this invention, while being able to flexibly position a heat exchange pipe, the heat exchanger set to the appropriate form can be installed easily.

1 is a side view of a heat exchanger according to a preferred embodiment of the present invention. (a) is a top view of the heat exchanger of an Example, (b) is a bottom view of the heat exchanger of an Example. It is the A section enlarged view of FIG.2 (b). It is a front view which shows the holder of an Example. It is a side view of the heat exchanger which concerns on the example of a change.

  Next, a preferred embodiment of the heat exchanger installation method according to the present invention will be described below with reference to the accompanying drawings. In addition, the direction of the heat exchanger in the following description is based on the state installed in the ground.

  First, the heat exchanger obtained by the installation method of an Example is demonstrated. As shown in FIG. 1 or 2, the heat exchanger 10 according to the embodiment includes a winding portion 16 including a heat exchange pipe 12 that is arranged so that a plurality of loops 18 are connected, and is disposed along the winding portion 16. The heat exchanger main body 14 having a linear portion 20 made of the heat exchange tube 12 and a holder 26 (see FIG. 3) for connecting the winding portion 16 and the linear portion 20 is provided. The heat exchanger main body 14 of the embodiment is configured by bending one heat exchange tube 12 in a predetermined pattern or linearly extending. In the heat exchanger 10, the heat exchange pipe 12 (referred to as an inflow pipe 22 in the case of distinction) that is the inflow side of the heat medium to the heat exchanger body 14 and the outflow side of the heat medium from the heat exchanger body 14. A heat exchange pipe (referred to as a return pipe 24 when distinguished) is located on the same side of the heat exchanger body 14. And the heat exchanger main body 14 keeps a predetermined | prescribed form by the winding part 16 and the linear part 20 being connected by the holder 26. FIG. In the embodiment, the inflow pipe 22 is connected to the winding part 16, and the return pipe 24 is connected to the linear part 20.

  The heat exchange pipe 12 has flexibility, and a pipe that can be bent into a circular arc shape or stretched linearly by hand is adopted. The heat exchange tube 12 is supplied as a product in a coiled state. The heat exchange tube 12 may be any material having flexibility and appropriate thermal conductivity, and a synthetic resin such as vinyl chloride, polyethylene, polypropylene, polybutene, and crosslinked polyethylene, or a composite tube made of metal and resin is used. Polyethylene is preferable from the viewpoint of cost, strength, corrosion resistance, and the like.

  As shown in FIG. 4, the holder 26 includes a pair of holding portions 28, 30, and holds the heat exchange tube 12 constituting the loop 18 of the winding portion 16 with one holding portion (first holding portion) 28. At the same time, the other holding part (second holding part) 30 is configured to hold the heat exchange pipe 12 constituting the linear part 20. The holding portions 28 and 30 are formed in an annular shape having holding spaces 28a and 30a that match the outer shape of the heat exchange tube 12, and the opposite side of the other holding portions 30 and 28 is cut away to hold the heat exchange tube 12 in the holding space 28a. , 30a are provided with insertion / removal openings 28b, 30b. In the holder 26 of the embodiment, the pair of holding portions 28 and 30 are connected to each other in a back-to-back state with the insertion / removal openings 28b and 30b facing to the opposite side. The insertion / removal openings 28b and 30b are set to be smaller than the diameter of the heat exchange tube 12 fitted into the holding spaces 28a and 30a. The holding portions 28 and 30 are configured to be elastically deformable, and can be deformed so as to be separated from a normal state in which the opposing one portions are aligned with the outer shape of the heat exchange pipe 12 with the insertion / removal openings 28b and 30b interposed therebetween. It has become. The holding portions 28, 30 are configured to detach the heat exchange tube 12 from the holding spaces 28a, 30a through the insertion / removal openings 28b, 30b by expanding the piece portions, and the holding spaces 28a, 30a, It is fixed to the heat exchange pipe 12 accommodated in 30a.

  The holder 26 has a pair of holding portions 28 and 30 fixed to each other, and the first holding portion according to the angle of the loop surface L (see FIG. 2) of the loop 18 with respect to the extending direction of the linear portion 20. The through direction of the holding space 28a (the axial direction of the ring that defines the holding space 28a) and the through direction of the holding space 30a of the second holding unit 30 (the axial direction of the ring that defines the holding space 30a) are set. Has been. In the embodiment, since the loop surface L of the loop 18 intersects the extending direction of the linear portion 20 at a predetermined angle, the penetrating direction of the holding space 28a of the first holding portion 28 and the second holding portion are set. The through direction of the 30 holding spaces 30a intersects at a predetermined angle. Further, in the holder 26 of the embodiment, the first holding portion 28 and the second holding portion 30 are set to have the same shape and size, and the loop 18 is constituted by any holding portion 28, 30. It can be attached to the heat exchange pipe 12, and any of the holding parts 28, 30 can be attached to the heat exchange pipe 12 constituting the linear part 20.

  As shown in FIG. 1 or FIG. 2, in the heat exchanger main body 14, the winding part 16 is formed so that the heat exchange pipe 12 is shifted in a direction parallel to the loop surface L and a plurality of continuous loops 18 are arranged. The Further, in the heat exchanger main body 14, the linear portion 20 connects the heat exchange pipe 12 connected to one end in the arrangement direction of the loop 18 in the winding portion 16 from the one end in the arrangement direction toward the other end in the arrangement direction in the winding portion 16. And extending along the alignment direction N. In the heat exchanger main body 14, the linear portion 20 is configured to pass below the loop 18 in the winding portion 16, and in the embodiment, the linear portion 20 is positioned approximately at the center in the width direction of the winding portion 16 in plan view. Thus, it linearly extends from one end of the arrangement direction to the other end of the arrangement direction. The winding part 16 is installed in the heat exchange tube 12 so that a plurality of loops 18 have their loop surfaces L upright, and adjacent loops 18 and 18 are arranged so as to be shifted from each other in a direction parallel to the loop surface L. ing. Further, in the winding portion 16, the heat exchange tubes 12 are arranged so that the adjacent loops 18 and 18 partially overlap each other in the alignment direction N, but are separated so that the adjacent loops 18 and 18 do not contact each other. It is preferable. In the winding part 16, it is possible to reduce the installation space of the heat exchange pipe 12 by arranging adjacent loops 18 and 18 so as to partially overlap. However, if the heat exchange pipes 12 are closely packed, the heat exchange efficiency in the ground Therefore, it is preferable that the overlapping portion of the loops 18 is less than half of the adjacent loops 18. Further, in the front view of the loop surface L (side view of the heat exchanger main body 14), it is preferable that the contact and crossing of the heat exchange pipes 12 are less during one cycle in which the loop 18 returns from the upper end to the lower end and back to the upper end again. . Specifically, the winding portion 16 preferably has a total of 12 or less, more preferably 8 or less, in the intersection of the loop 18 that overlaps in the horizontal direction and the point (contact point) that does not overlap in the horizontal direction but is adjacent in the alignment direction N. Particularly preferred are those having an intersection of 6 or less and no contact.

  In the winding part 16, the loop surface L of each loop 18 intersects with the arrangement direction N of the plurality of loops 18 in a plan view of the heat exchanger body 14. In other words, in the plan view of the heat exchanger body 14, the axial direction of the heat exchange tube 12 of the winding portion 16 is inclined with respect to the axial direction of the heat exchange tube 12 of the linear portion 20 at the holding position of the holder 26. ing. Thus, the heat exchange pipe 12 of the linear part 20 and the heat exchange pipe 12 of the winding part 16 have a relationship that is neither parallel nor vertical. Here, when the loop surface L is in a posture laid down with respect to the arrangement direction N (setting the angle shallow), the width of the groove 32 excavated for installing the heat exchanger body 14 can be reduced. . In the heat exchanger body 14, the plurality of holders 26 are separated from each other in the extending direction of the linear portion 20 and are disposed on the linear portion 20 via the second holding portion 30. The loop 18 of the winding part 16 held by the first holding part 28 is adjusted by adjusting the distance between the loops 18 and aligned. That is, in the heat exchanger main body 14, the arrangement pattern such as the pitch of the loop 18 in the winding portion 16, the angle of the loop surface L, and the non-contact state of the adjacent loops 18, 18 is a plurality of attached to the linear portion 20. It is defined by the holding by the holder 26.

  Next, the installation method of the heat exchanger 10 mentioned above is demonstrated. On the ground, the heat exchange tube 12 wound in a coil shape is spread while being shifted in the direction along the coil surface, and the heat exchange tube 12 is expanded so that a plurality of continuous loops 18 and 18 are arranged in a state of being laid on the ground surface. Thereby, the winding part 16 is formed. At this time, in the winding part 16, a part of the adjacent loops 18 and 18 are overlapped vertically. When the heat exchange pipe 12 connected to one end of the winding portion 16 in the arrangement direction of the loops 18 is installed in the groove 32, the heat exchange tube 12 extends along the outer side of the end portion of the loop 18 serving as the lower end portion of the winding portion 16 and parallel to the arrangement direction of the loops 18. The linear portion 20 is formed by extending the heat exchange tube 12 from one end side to the other end side of the winding portion 16 in the arrangement direction of the loops 18.

  The holder 26 is disposed between the linear portion 20 and the loop 18 of the winding portion 16, the heat exchange pipe 12 constituting the loop 18 is inserted into the first holding portion 28, and the wire is connected to the second holding portion 30. The heat exchange pipe 12 constituting the shaped part 20 is inserted. The loop 18 and the linear part 20 of the winding part 16 are connected by the independent holder 26 for each loop 18 or for each loop 18 with a predetermined interval, so that the winding part 16 and the linear part 20 are combined. An exchanger body 14 is formed. The heat exchanger body 14 can be handled as an integral structure by combining the winding portion 16 and the linear portion 20 connected by the holder 26. The heat exchanger body 14 has a total approximate height that is the sum of the diameter of the loop 18 and the diameter of the heat exchange pipe 12 constituting the linear portion 20, and has an overall width (the direction in which the loops 18 are arranged). An orthogonal horizontal dimension) is smaller than the diameter of the loop 18, and the heat exchanger body 14 is compact in the width direction.

  In the heat exchanger main body 14, the arrangement pattern of the heat exchange tubes 12 constituting the heat exchanger main body 14 is defined by the holder 26 that connects the loop 18 and the linear portion 20. Specifically, the pitch of the loop 18 in the winding portion 16 and the relationship in which the adjacent loops 18 and 18 do not contact when the heat exchanger main body 14 is installed are extended from the linear portion 20 to the linear portion 20. It is defined by the positions of a plurality of holders 26 that are spaced apart in the direction. In addition, the angle of the loop surface L of each loop 18 is defined by the relationship between the penetrating direction of the holding space 28 a in the first holding unit 28 and the penetrating direction of the holding space 30 a in the second holding unit 30. That is, in the embodiment, since the penetration directions of the first holding part 28 and the second holding part 30 intersect in the plan view of the heat exchanger main body 14, the loop surface L extends from the linear part 20. It is defined by the angle that intersects the current direction.

  A trench 32 used for laying a dark pipe, a excavating machine such as a power shovel or a backhoe, and the like, a groove 32 extending in the longitudinal direction along the arrangement direction of the loops 18 in the heat exchanger main body 14 is provided. 14 is excavated in a size that can accommodate 14. Here, since the heat exchanger main body 14 is assembled on the ground as described above, it is not necessary for an operator to enter the groove 32 in order to configure the heat exchanger main body 14, and the groove 32 is a heat exchanger to be installed. What is necessary is just to excavate with the minimum width | variety which can accommodate this heat exchanger main body 14 according to the main body 14. FIG. As described above, the width of the groove 32 is set to be narrow and an operator does not need to enter the groove 32. Therefore, support work such as earth retaining in the groove 32 can be omitted or simplified. In the embodiment, the groove 32 is excavated deeper than the height of the heat exchanger main body 14, and the width of the groove 32 is such that when the heat exchanger main body 14 is installed in the groove 32, the heat exchanger main body 14 moves to the groove 32. Even when leaning against the wall, the posture is set such that the posture of the loop surface L of the loop 18 can be maintained. The width of the groove 32 is set to be not less than the width of the heat exchanger body 14 and smaller than the diameter of the loop 18, and preferably not more than twice the width of the heat exchanger body 14. That is, the heat exchanger main body 14 is arranged in a posture in which the loop surface L of the loop 18 in the winding portion 16 is set up and the linear portion 20 is arranged below the winding portion 16. Compared with the case where the surface L is arranged so as to approach the horizontal, the width of the groove 32 can be narrowed, and excavation effort and the amount of excavated soil can be suppressed. Moreover, since the groove 32 has a minimum width according to the arrangement pattern of the heat exchange pipe 12, the posture in which the loop 18 is stood against the wall of the groove 32 can be maintained, and the heat exchanger main body 14 can be maintained. In order to support, a support such as a support is not particularly required. As described above, the heat exchanger main body 14 is arranged so that the loop surface L intersects the arrangement direction N of the plurality of loops 18 at a predetermined angle, so that the central portion in the vertical direction of the loop 18 is in the width direction. Therefore, it becomes easy to stand up because it becomes elastically in contact with the wall surface of the groove 32.

  The heat exchanger main body 14 assembled on the ground is dropped into the groove 32 with the linear portion 20 facing downward, and is installed in the groove 32 with the loop surface L in an upright posture. Then, the groove 32 is backfilled with excavated soil, sand, concrete, or other backfill material. As a result, the gaps between the loops 18 and the gaps between the loops 18 and the linear portions 20 are filled with the backfill material, and the pitch of the loops 18 defined by the holder 26, the separation state of the loops 18, and the angle of the loop surface L The heat exchanger main body 14 is embedded in the ground in a state where the arrangement pattern of the heat exchange pipes 12 is maintained. Since the heat exchanging pipe 12 constituting the loop 18 of the winding part 16 and the heat exchanging pipe 12 constituting the linear part 20 are connected by the holder 26, it is inserted into the groove 32 from the linear part 20 side. Further, it is possible to prevent the winding portion 16 from being caught on the wall surface of the groove 32 by spreading between the loops 18 and 18. Moreover, since the heat exchanger main body 14 is relatively heavy on the linear portion 20 side, it is easy to insert the heat exchanger body 14 into the groove 32 and to position the heat exchanger body 14 within the groove 32. Here, even if the heat exchanger main body 14 is assembled from the heat exchange pipe 12 after the groove 32 is excavated, or the groove 32 is excavated after the heat exchanger main body 14 is assembled, the heat exchanger main body is excavated while the groove 32 is excavated. 14 may be installed in any order. Since the heat exchanger main body 14 can be immediately installed in the groove 32 after excavation of the groove 32 by assembling the heat exchanger main body 14 before the completion of the excavation of the groove 32 as in the embodiment, the collapse of the groove 32 There is a merit that is not easily affected by the above.

  The heat exchanger body 14 can change the arrangement position of the holder 26 along the linear portion 20, so that the distance between the loops 18 in the winding portion 16 can be adjusted flexibly and easily. Moreover, since the heat exchanger main body 14 can change the arrangement | positioning position with respect to the loop 18 with respect to the holder 26, the space | interval adjustment of the loop 18 in the winding part 16 can be performed more flexibly and easily. The heat exchanger body 14 can define the angle of the loop surface L of the loop 18 as the loop 18 and the linear portion 20 are connected by the holder 26. That is, according to the installation method of the embodiment, the angle adjustment of the loop 18 is simple, the parallel relationship between the loop surfaces L and L of the adjacent loops 18 and 18 can be appropriately maintained, and the adjacent loops 18 and 18 can be maintained. It is possible to prevent the heat exchanger body 14 from being deformed, such as coming into contact. Thus, since the loop 18 of the winding part 16 is appropriately aligned by the holder 26, the heat exchanger body 14 can realize heat exchange as designed when installed in the ground. Further, since the adjacent loops 18 and 18 are separated from each other by the holder 26, the heat exchanger main body 14 is prevented from exchanging heat between the loops 18, and the contact area between the soil and the heat exchange pipe 12 is increased to improve efficiency. Heat exchange can be performed well. In addition, since the heat exchanger main body 14 is assembled on the ground, it is easy to perform an assembly operation.

  The heat exchanger main body 14 is integrally handled without greatly changing the arrangement pattern of the heat exchange tubes 12 constituting the heat exchanger main body 14 by holding the linear portion 20 and the loop 18 by the holder 26. The installation work in the groove 32 can be easily performed. The holder 26 is disposed between the overlapping portions of the loop 18 and the linear portion 20, and does not protrude outwardly from a range in which the outer shape of the winding portion 16 is projected onto a plane (see FIG. 2B or FIG. 3). . That is, when the heat exchanger body 14 is installed in the groove 32, the holder 26 can be prevented from being caught in the groove 32, and the presence of the holder 26 does not interfere with the installation work of the heat exchanger body 14. In other words, even when the heat exchanger main body 14 is assembled with the holder 26, the holder 26 does not protrude from the winding portion 16 as described above, so that it is not necessary to increase the width and depth of the groove 32 for the holder 26. . Since the holder 26 is attached independently for each loop 18 to be positioned, the heat exchanger body 14 can be deformed to some extent according to the installation site, and the installation work can be performed flexibly and easily. Even if the heat exchanger main body 14 is deformed, the pitch of the loop 18 and the angle of the loop surface L are defined by the holder 26. Therefore, after the heat exchanger main body 14 is installed in the groove 32, the relationship of the loop 18 is determined. Will not collapse. Moreover, since the holder 26 is compact corresponding to the individual loops 18, not the entire winding portion 16, it is easy to handle without being bulky and can be attached to any loop 18, so that the degree of freedom of installation work is high. Easy to install. In the installation method of the embodiment, the linear portion 20 inevitably provided in the heat exchanger body 14 is used as a reference for adjusting the interval between the plurality of holders 26, so that the number of parts can be minimized. .

(Change example)
The present invention is not limited to the above-described embodiment, and can be modified as follows, for example.
(1) As shown in FIG. 5, an embedded display tape T in which a plurality of upper holders 34 are movably disposed is installed above the heat exchanger body 14 installed in the groove 32, and the embedded display tape The upper holder 34 disposed at a predetermined interval in T may be attached to the upper end portion of the loop 18 of the winding portion 16 so that the upper portion of the loop 18 is aligned. According to the configuration of the modified example, the lower part of the loop 18 of the winding part 16 is positioned by the holder 26 connected to the linear part 20, and the upper part of the loop 18 is positioned by the upper holder 34 connected to the embedded display tape T. Therefore, the arrangement pattern of the heat exchange tubes 12 constituting the heat exchanger body 14 installed in the groove 32 can be set more accurately.
(2) In the heat exchanger body of the embodiment, the linear portion is disposed so as to pass below the loop in the winding portion, but the linear portion is disposed so as to pass above the loop in the winding portion. Also good. Note that the upper side or the lower side of the loop may be arranged so that the linear portion partially overlaps the upper or lower portion of the loop in a side view of the loop.
(3) The holding part of the holder is not limited to the configuration of the embodiment, and may be, for example, a clip shape that sandwiches the heat exchange tube as long as it can hold the heat exchange tube.
(4) The holder can also employ a configuration in which a support is provided between one holding portion and the other holding portion, and the loop and the linear portion are separated by a predetermined distance.
(5) The holder may be configured such that the rotation of the other holding portion relative to the one holding portion is adjustable, and the angle of the loop surface of the loop may be adjusted.
(6) In the embodiment, the inflow pipe is connected to the winding portion and the return pipe is connected to the linear portion, but the inflow pipe is connected to the linear portion and the return pipe is connected to the winding portion, The heat medium may be introduced from the linear portion and returned from the winding portion.
(7) The groove may not be linear, may be bent, or may be a combination of a straight line and a curved line. Since the heat exchange tube has flexibility, the heat exchanger body also has flexibility as a whole, and even if the groove is curved, the heat exchanger body is arranged according to the shape of the groove can do. Therefore, the heat exchanger main body can be arranged avoiding existing structures and piping.
(8) The heat exchanger main body is not limited to being placed in the groove and backfilled, and the heat exchanger main body may be buried in the ground by placing the heat exchanger main body on the ground surface and performing embankment. Further, instead of installing the entire heat exchanger main body in the groove, only a part of the heat exchanger main body may be installed in the groove, and a portion protruding from the groove may be buried.
(9) The heat exchanger body is not limited to a mode in which the loop surface of the loop is installed in an upright posture, and may be a posture in which the loop surface of the loop is horizontally laid or inclined.

12 heat exchanger, 14 heat exchanger body, 16 winding parts, 18 loops, 20 linear parts,
26 holder, 32 groove, L loop surface, N alignment direction

Claims (4)

An installation method of a heat exchanger that is used in a geothermal heat pump system and buried in the ground,
On the ground, the heat exchange tube wound in a coil shape is shifted and extended in the direction along the coil surface to form a winding portion in which a plurality of continuous loops are arranged, and is connected to one end of the winding portion in the arrangement direction of the loops. A linear portion is formed by extending the heat exchange tube along the arrangement direction so as to pass the upper side or the lower side of the loop in a posture in which the loop surface is raised toward the other end of the loop in the arrangement direction of the loop. And
The heat exchange pipe constituting the loop and the heat exchange pipe constituting the linear portion are connected by a holder to form a heat exchanger body in which the loop is positioned, and the heat exchanger body is embedded. A heat exchanger installation method characterized by the above.   2. The heat exchanger according to claim 1, wherein the heat exchanger main body is installed in a posture in which the loop surface of the loop is raised in a groove excavated to a size capable of accommodating the heat exchanger main body, and the groove is backfilled. Installation method.   The heat exchanger installation method according to claim 2, wherein the heat exchanger body is inserted into the groove from the linear part side, and the heat exchanger body is installed in the groove with the linear part facing down.   The heat exchanger installation method according to claim 2 or 3, wherein the heat exchanger body is formed before completion of excavation of the groove.

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