JP6273053B1 - Heat collection pipe mechanism, manufacturing method thereof, and air conditioner - Google Patents

Abstract

The present invention provides a heat collecting pipe mechanism that hardly causes water leakage, a manufacturing method thereof, and an air conditioner using the same. An air conditioner includes a heat collection pipe mechanism 10 disposed in the ground, an air supply mechanism that supplies air from an external space to a building, and a water circulation mechanism that circulates water for heat exchange. Prepare. The heat collecting pipe mechanism 10 includes a pipe member 11 having a first flow path 11X for flowing air from one side to the other, a spiral pipe 12 having a second flow path 12X for flowing ground water for heat exchange from one side to the other, A water supply mechanism 15 is provided. The water supply mechanism 15 is connected to the closing member 15C that closes the opening end of the second flow path 12X, the through pipe 15P that passes through the closing member 15C, the elbow pipe 15L that is connected to the through pipe 15P, and the elbow pipe 15L. A pipe 15H. [Selection] Figure 5

Description

  The present invention relates to a heat collecting pipe mechanism, a manufacturing method thereof, and an air conditioner.

  In recent years, air conditioners that heat and cool buildings and the like using geothermal heat with small year-round temperature fluctuations have attracted attention. An example of such an air conditioner 110 is shown in FIG. 1A. This device 110 has a heat collecting pipe mechanism 111 embedded in the ground while the pipe axis direction C111 is oriented in a substantially horizontal direction for collecting ground heat. Then, according to the apparatus 110, after air for air conditioning is taken into the heat collecting pipe mechanism 111 from one pipe end 111ea and flows through the pipe member 111, the air is supplied to the other pipe end 111a. It is taken out from 111eb. Thereby, the air is cooled in the summer and heated in the winter. The cooled or heated air is used for air conditioning of a building 120 having a large space such as an agricultural facility such as a barn, a general facility such as an apartment house or a public gymnasium, or an industrial facility such as a factory.

  By the way, the year-round temperature fluctuation in the ground changes according to the depth from the ground surface as shown in FIG. 1B. For example, the annual temperature fluctuation is large at a shallow position less than 5 m deep, but the annual temperature fluctuation is small enough to be ignored at a deep position of 5 m or more deep, and the substantially constant temperature value is the same. It almost coincides with the annual average temperature of the location. Therefore, generally, if the embedment depth of the heat collecting pipe mechanism 111 is 5 m or more, good heat exchange with the underground heat is ensured. On the other hand, when the distance is less than 5 m, the air cooling ability in summer and the air heating ability in winter are inferior compared to the case of 5 m or more.

  On the other hand, the excavation cost when the heat collecting pipe mechanism 111 is buried in the ground is high, and the cost increases as the excavation depth increases. Therefore, there is a desire to make the embedment depth of the pipe member 111 as shallow as possible. In order to meet such demands, an air conditioner has been proposed that makes it possible to simultaneously improve the cooling capacity in summer and the warming capacity in winter and reduce the excavation cost (for example, Patent Document 1).

  The air conditioner described in Patent Document 1 uses a heat collecting pipe mechanism 111 a as shown in FIG. 1C instead of the heat collecting pipe mechanism 111. The heat collecting pipe mechanism 111a includes a tubular body 111aa having a hollow portion Xa through which air passes, and a water channel 111aw arranged in a spiral shape in the peripheral portion of the tubular body 111aa. Further, at both ends of the water channel 111aw, a water supply pipe for supplying water for heat exchange and a drain pipe for draining the water are provided. As the water supply pipe and the drain pipe, as shown in FIG. 1D, the tubular body 111aa A joint structure 111aj penetrating from the inner peripheral surface toward the water channel 111aw is provided. If water is allowed to flow through the water channel 111aw from one pipe end 111aea of the pipe member 111a to the other pipe end 111aeb, the pipe member 111a is placed at a shallow depth of less than 5 m in the ground. Heat exchange with the water flowing from the one pipe end portion 111 aea to the other pipe end portion 111 aeb for the decrease in the summer cooling capacity of the geothermal heat and the decrease in the warming capacity in winter that can occur when buried. Can be supplemented by.

Japanese Patent Laying-Open No. 2015-212606

  However, it has been found that when an air conditioner employing the heat collecting pipe mechanism 111a is operated, water may leak from the vicinity of the joint structure 111aj. This phenomenon is not limited to the case where the heat collecting pipe mechanism 111 is buried in the ground, and the same applies to the case where the heat collecting pipe mechanism 111 is installed on the ground.

  In view of such circumstances, the present invention intends to provide a heat collecting pipe mechanism that hardly causes water leakage, a manufacturing method thereof, and an air conditioner using the same.

The heat collecting pipe mechanism of the present invention includes a first pipe member having a first flow path for flowing a first substance from one side to the other, a first pipe member formed on the first pipe member, and a second substance flowing from the one side to the other. A second pipe member having two flow paths, and a heat collecting pipe mechanism for exchanging heat between the first substance and the second substance via the second pipe member and the first pipe member. A closing portion that closes an opening at an end of the second tube member, and a through pipe that penetrates the closing portion, and the second tube member is spiral with the axial direction of the first tube member as a center. The opening of the end of the second tube member opens in the spiral direction of the second tube member, the through pipe faces the spiral direction of the second tube member, and the first substance is a gas. The second substance is a liquid, and the first pipe member and the second pipe member are made of synthetic resin . In addition, the heat collecting pipe mechanism of the present invention is formed in the first pipe member having the first flow path for flowing the first substance from one side to the other, and the second pipe substance from one side to the other. And a second pipe member having a second flow path for flowing, and a heat collecting pipe mechanism for exchanging heat between the first substance and the second substance via the second pipe member and the first pipe member And a welding part that closes an opening at an end of the second pipe member, and a through pipe that penetrates the welding part, wherein the first substance is a gas and the second substance is a liquid. The first tube member and the second tube member are made of synthetic resin .

  An air conditioner according to the present invention includes the above-described heat collecting pipe mechanism.

The manufacturing method of the heat collecting pipe mechanism of the present invention includes a closing step of closing a flow passage opening formed at an end of a spiral tube having a flow passage, and a communication step of communicating the flow passage with an external space. In the communicating step, a through pipe is passed through the closed portion of the spiral tube , the flow passage opening opens in the spiral direction, the through pipe faces in the spiral direction, and the spiral tube is made of synthetic resin. It is made of . Further, the manufacturing method of the heat collecting pipe mechanism of the present invention includes a closing step of welding a flow channel opening formed at an end of a spiral tube having a flow channel, and a communication step of communicating the flow channel with an external space. In the communication step, a penetration pipe is passed through the welded portion of the spiral tube, and the spiral tube is made of a synthetic resin .

  According to the present invention, it is possible to provide a heat collecting pipe mechanism and an air conditioner that are unlikely to cause water leakage.

It is a side view which shows the outline | summary of the conventional air conditioning apparatus. It is a graph which shows the relationship between the depth from the surface of the earth, and the temperature of the ground for each month. It is a perspective view which shows the outline | summary of the conventional pipe member for heat collection. It is sectional drawing which shows the outline | summary of the conventional pipe member for heat collection. It is a side view which shows the outline | summary of an air conditioning apparatus. It is a perspective view which shows the outline | summary of the pipe member for heat collection. It is a side view which shows the outline | summary of the pipe member for heat collection. (A) is a front view which shows the outline | summary of the pipe member for heat collection. (B) is an enlarged view of a broken line part in (A). 5 is a flowchart of a method for manufacturing the heat collecting pipe mechanism 10. 7 is a cross-sectional view showing a second flow path mechanism 81. FIG. It is the elements on larger scale which show the outline | summary of the pipe mechanism 10 for heat collection.

  As shown in FIG. 2, the air conditioner 2 includes a heat collection pipe mechanism 10 disposed in the underground GND, a first duct mechanism 20 that communicates the external space GX and the heat collection pipe mechanism 10, and a heat collection apparatus. A second duct mechanism 30 that communicates the pipe mechanism 10 and the building 120, an air supply mechanism 50 that supplies air from the external space GX to the building 120, and a water circulation mechanism 60 that circulates water for heat exchange are provided.

  As shown in FIGS. 3 to 4, the heat collecting pipe mechanism 10 includes a pipe member 11 having a first flow path 11 </ b> X that flows air (first substance) from one side to the other, and groundwater for heat exchange from one side to the other. And a spiral tube 12 having a second flow path 12X for flowing (second substance). The tube member 11 and the spiral tube 12 are preferably integrated.

  The pipe member 11 is formed in a cylindrical shape, and is arranged in a substantially horizontal direction in the underground GND. When a plurality of tube members 11 are used as the heat collecting tube mechanism 10, the tube members 11 are arranged so that the openings at the ends of the first flow paths 11 </ b> X of the adjacent tube members 11 face each other. The spiral tube 12 extends spirally around the tube axis direction C1 of the heat collecting tube mechanism 10 and protrudes outward on the outer peripheral surface 11G of the tube member 11.

  Returning to FIG. 2, the heat collecting pipe mechanism 10 is further provided at the water supply mechanism 15 provided at one opening end of the second flow path 12X and the other opening end of the second flow path 12X. A drainage mechanism 16.

  As shown in FIG. 5, the water supply mechanism 15 includes a closing member 15C that closes the open end of the second flow path 12X, a through pipe 15P that passes through the closing member 15C, and an elbow pipe 15L that is connected to the through pipe 15P. And a pipe 15H connected to the elbow pipe 15L.

  The thickness TH1 of the closing member 15C is preferably thicker than the thickness TH0 of the spiral tube 12 that forms the second flow path 12X. The blocking member 15C is formed with a hole 15CX (FIG. 8C) that communicates the external space with the second flow path 12X. One end of the through pipe 15P can be inserted into the hole 15CX. When one end of the through pipe 15P is inserted into the hole 15CX, one end opening of the through pipe 15P opens into the second flow path 12X. The other end of the through pipe 15P is connected to the elbow pipe 15L. Thereby, the water supply mechanism 15 does not protrude from the pipe member 11 in the outer diameter direction R1 (FIG. 5A) and the pipe axis direction C1 (FIG. 4) of the pipe member 11.

  The end opening on one side of the through pipe 15P may be flush with the wall surface 15CA of the closing member 15C, or may be depressed or protruded. Moreover, it is preferable that an external thread is formed in the outer peripheral part of the one end part of the penetration pipe 15P. Furthermore, it is preferable that a female screw that can be screwed into the male screw of the through pipe 15P is formed in the hole 15CX (FIG. 5B). In addition, a seal tape is preferably wound around the outer peripheral portion of the through pipe 15P.

  Since the drainage mechanism 16 has the same structure as the water supply mechanism 15, a detailed description thereof will be omitted.

  As shown in FIG. 2, the air supply mechanism 50 includes a pump provided in the duct mechanism 20, various sensors provided in the duct mechanism 20, and a controller connected to each part. The controller reads sensing signals from various sensors and controls various pumps. From the air supply mechanism 50, the air in the external space can be sent to the underground heat collecting pipe mechanism 10, and the heat exchanged in the ground can be sent to the building 120.

  The water circulation mechanism 60 includes a pipe 61 that connects the water supply mechanism 15 and the drainage mechanism 16 and a pipe unit 62 that collects the pipes 61. The piping unit 62 includes a pump 62P provided in the piping 61, various sensors 62S provided in the piping 61, a controller 62C connected to each portion, and the like, and a circulation path including the piping 61 and the second flow path 12X (FIG. 5). Circulates water for heat exchange. As the water for heat exchange, groundwater that is at a constant temperature annually is used. By using such groundwater as water for heat exchange, it is possible to compensate for the lack of air cooling capability in summer and the lack of air heating capability in winter.

  Here, various sensors of the air supply mechanism 50 and the water circulation mechanism 60 include a flow sensor, a temperature sensor, and the like.

  Next, a method for using the air conditioner 2 will be described.

  As shown in FIG. 2, the water circulation mechanism 60 circulates groundwater in a circulation path including a pipe 61 and a second flow path 12X (FIG. 5). The air supply mechanism 50 sends the air in the external space to the building 120 via the first flow path 11X of the heat collecting pipe mechanism 10. By the water circulation mechanism 60 and the air supply mechanism 50, the air passing through the first flow path 11X undergoes heat exchange between the underground GND around the tube member 11 and the water passing through the second flow path 12X. As a result, heat exchange can be efficiently performed between the underground GND, groundwater, and air passing through the first flow path 11X.

  Here, when the liquid feeding pressure by the pump 62P is increased, the water pressure in the second flow path 12X increases. As a result, the spiral tube 12 is deformed so as to swell due to an increase in water pressure. In the prior art, the through pipe 111ap (FIG. 1D) of the joint structure 111aj corresponding to the water supply mechanism 15 and the drainage mechanism 16 penetrates a portion of the spiral pipe 12 that is easily deformed. The sealing effect of the gap with the spiral tube 12 is reduced, and water leakage is likely to occur.

  On the other hand, in the present invention, as shown in FIG. 5, since the thickness TH1 of the closing member 15C is thicker than the thickness TH0 of the spiral tube 12 forming the second flow path 12X, the blocking member 15C is caused by an increase in water pressure. Deformation is less likely to occur than the helical tube 12. Further, the through pipe 15P penetrates the closing member 15C which is not easily deformed. Therefore, water leakage due to an increase in water pressure is unlikely to occur.

  In the prior art (FIG. 1D), the through pipe 111ap is fixed to the inner surface of the spiral tube 12 by bolting via a washer to secure the sealing performance. However, the inner surface of the spiral tube 12 is a curved surface. Furthermore, as will be described later, when the spiral tube 12 is an extrusion-molded body, minute irregularities that are marks of molding remain on the inner surface of the spiral tube 12. Even if the through pipe 111ap is fixed to the inner surface of the spiral tube 12 in such a state by using bolting via a washer, it is difficult to achieve high sealing performance. In the present invention, since the hole 15CX is formed in the closing member 15C and the through pipe 15P is screwed into the hole 15CX, higher sealing performance can be ensured as compared with the prior art.

  From the viewpoint of the heat exchange rate, the inner peripheral side portion of the spiral tube 12 forming the second flow path 12X is a path through which heat is exchanged between groundwater and air (hereinafter referred to as a heat exchange path). Therefore, I want to make that part as thin as possible. Similarly, since the outer peripheral portion serves as a heat exchange path for exchanging heat between the underground GND and the groundwater, it is desired to make the portion as thin as possible. On the other hand, the path through which the second flow path 12X communicates with the external space is set so as to avoid the heat exchange path, like the closing member 15C. For this reason, it is possible to prevent groundwater circulation and groundwater leakage while suppressing a decrease in the heat exchange rate. That is, it becomes easy to individually design the circulation of groundwater and the prevention of leakage of groundwater in the second flow path 12X and the external space, and the securing of the heat exchange rate.

  Further, when the through pipe 15P is screwed into the hole 15CX of the closing member 15C, the opening direction of the through pipe 15P is parallel to the flow direction in the second flow path 12X. Compared with the case where the flow direction is orthogonal to the flow path 12X, water becomes easier to flow from the second flow path 12X toward the through pipe 15P. Therefore, the heat exchange rate is improved.

  Next, a method for manufacturing the heat collecting pipe mechanism 10 will be described.

  As shown in FIG. 6, the manufacturing method of the heat collecting pipe mechanism 10 includes a second flow path forming step 90 for forming a second flow path mechanism 81 having a second flow path 12X, and a spiral second flow path. A tube mechanism forming step 92 for forming the heat collecting tube mechanism 10 from the mechanism 81, a closing step 94 for closing the end opening of the second flow path 12X using the closing member, and a drilling step for opening a hole in the closing member 15C. 96 and a penetrating process 98 for penetrating the penetrating pipe 15P through the closing member 15C.

  In the second flow path forming step 90, a cylindrical second flow path mechanism 81 having a hollow portion that becomes the second flow path 12X is formed using a mold. In the present embodiment, the hollow portion of the second flow path mechanism 81 has a trapezoidal cross section as shown in FIG.

  In the pipe mechanism forming step 92, the second flow path mechanism 81 is spiraled and the adjacent portions 81D are welded together. Thus, the heat collecting pipe mechanism 10 is formed from the spiral second flow path mechanism 81 (FIG. 5). At this time, in the cross-sectional direction of the second flow path mechanism 81, the inner peripheral portion 81N of the second flow path mechanism 81 functions as the tube member 11, and the outer peripheral portion 81G of the second flow path mechanism 81 functions as the spiral tube 12. (FIG. 8 (A)).

  In the closing step 94, the end opening 12XX of the second flow path 12X is closed using the closing member 15C (FIG. 8B). As illustrated, the closing member 15C may be disposed in the second flow path 12X or may be disposed outside the second flow path 12X. The material of the closing member 15C is not particularly limited, but it is preferable to use the same material as the second flow path mechanism 81 or a material that is more difficult to deform than the second flow path mechanism 81. When a material that is more easily deformed than the second flow path mechanism 81 is used as the material of the closing member 15C, the thickness of the closing member 15C is set to a level that is less likely to be deformed than the second flow path mechanism 81. Good.

  As a closing method, welding is preferable if the material of the closing member 15C is a synthetic resin. Examples of the synthetic resin used as a material for the closing member 15C and the second flow path mechanism 81 include polyethylene, and among them, high-density polyethylene is used. In addition, if the material of the closing member 15C is a metal, welding may be used. Examples of the metal used as the material of the closing member 15C and the second flow path mechanism 81 include stainless steel and aluminum alloy. Moreover, as an aspect of closure, the contact portion between the closure member 15C and the heat collecting pipe mechanism 10 may be welded or welded, or the entire closure member 15C may be welded or welded.

  In the drilling step 96, a hole 15CX communicating with the second flow path 12X and the external space is provided in the closing member 15C, and a female screw is formed in the hole 15CX (FIG. 8C).

  In the penetration step 98, a penetration pipe 15P that can be screwed into the hole 15CX is screwed (FIG. 8D). Accordingly, the second flow path 12X and the external space communicate with each other through the water supply mechanism 15 and the drainage mechanism 16.

  The pipe mechanism forming step 92 is performed before the closing step 94, the drilling step 96, and the penetrating step 98. However, the present invention is not limited to this, and any of the closing step 94, the punching step 96, and the penetrating step 98 is performed. You may carry out after that process.

  In the above embodiment, the first substance is air and the second substance is groundwater, but the present invention is not limited to this. For example, the first substance may be a gas such as nitrogen or oxygen, and the second substance may be water or other liquid whose temperature is adjusted.

  In the above-described embodiment, the spiral tube 12 is projected outwardly on the outer peripheral surface 11G of the tube member 11 (FIG. 5B), but the present invention is not limited to this, and the inside of the tube member 11 It may project inward on the peripheral surface 11N or may be provided on the thick portion 11C of the pipe member 11.

  In the above embodiment, the heat collecting pipe mechanism 10 is arranged in the ground GND, but the present invention is not limited to this, and the heat collecting pipe mechanism 10 may be arranged on the ground. When the heat collecting pipe mechanism 10 is arranged on the ground, an enclosure member that covers the pipe unit in which the pipe member 11 and the spiral pipe 12 are integrated, and a filler that fills a gap between the pipe unit and the enclosure member. And preferably. Moreover, it is preferable that thermal conductivity becomes high in order of an enclosure member, a filler, and a pipe unit. The enclosing member has a three-layer structure, and preferably includes a heat insulating layer, an outer layer located outside the heat insulating layer, and an inner layer located inside the heat insulating layer. The heat insulating layer is made of rigid urethane foam (rigid polyurethane foam), and its thermal conductivity is lower than that of the filler and the tube unit. The outer layer material includes a steel plate, and the inner layer material includes an aluminum sheet. As the filler, water, sand (river sand, mountain sand, quartz sand, etc.), soil or the like may be used. When using sand, it is preferable to use water-containing sand for the purpose of increasing the thermal conductivity. Furthermore, for the purpose of increasing the thermal conductivity, a granular material composed of at least one of silicon oxide, alumina, and blast furnace slag may be mixed at a volume content of 1 to 20% with respect to sand or earth. .

  In the above embodiment, the spiral second flow path 12X is provided around the tube member 11. However, the present invention is not limited to this, and a straight second flow path 12X may be provided around the tube member 11. Good.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

2 Air conditioner 10 Heat collection pipe mechanism 15 Water supply mechanism 15C Closure member 15P Through pipe 15L Elbow pipe 15H Pipe 16 Drainage mechanism 20 First duct mechanism 30 Second duct mechanism 50 Air supply mechanism 60 Water circulation mechanism

Claims (11)

A first pipe member having a first flow path for flowing a first substance from one to the other;
A second pipe member formed on the first pipe member and having a second flow path for flowing a second substance from one to the other,
A heat collecting pipe mechanism for performing heat exchange between the first substance and the second substance via the second pipe member and the first pipe member;
A blocking portion that closes an opening at an end of the second pipe member;
A through pipe penetrating the blocking portion,
The second pipe member extends spirally around the axial direction of the first pipe member,
The opening at the end of the second pipe member is directed in the spiral direction of the second pipe member,
The through pipe faces the spiral direction of the second pipe member,
The first substance is a gas and the second substance is a liquid;
The heat collecting pipe mechanism, wherein the first pipe member and the second pipe member are made of synthetic resin.   2. The heat collecting pipe mechanism according to claim 1, wherein the closed portion is a welded portion. A first pipe member having a first flow path for flowing a first substance from one to the other;
A second pipe member formed on the first pipe member and having a second flow path for flowing a second substance from one to the other,
A heat collecting pipe mechanism for performing heat exchange between the first substance and the second substance via the second pipe member and the first pipe member;
A welded portion that closes an opening at an end of the second pipe member;
A through pipe penetrating the welded portion,
The first substance is a gas and the second substance is a liquid;
The heat collecting pipe mechanism, wherein the first pipe member and the second pipe member are made of synthetic resin.   4. The heat collecting pipe mechanism according to claim 1, wherein a thickness of a penetrating portion by the penetrating pipe is thicker than other portions of the member forming the second flow path. 5. .   The tube structure for heat collection according to any one of claims 1 to 4, wherein the tube member is formed of an extruded product.   An air conditioner comprising the heat collecting pipe mechanism according to any one of claims 1 to 5. A closing step of closing the flow path opening formed at the end of the spiral tube having the flow path;
A communication step of communicating the flow path with an external space,
In the communication step, a through pipe is passed through the closed portion of the spiral tube,
The channel opening opens in a spiral direction;
The through pipe is directed in the spiral direction,
The method of manufacturing a heat collecting pipe mechanism, wherein the spiral pipe is made of a synthetic resin. In the blockage step, the channel opening is closed by welding the channel opening,
The method for manufacturing a heat collecting pipe mechanism according to claim 7, wherein the closed portion is a welded portion . A closing step of welding a channel opening formed at the end of a spiral tube having a channel;
A communication step of communicating the flow path with an external space,
In the communication step, a through pipe is passed through the welded portion of the spiral tube,
The method of manufacturing a heat collecting pipe mechanism, wherein the spiral pipe is made of a synthetic resin.   The heat collecting device according to any one of claims 7 to 9, further comprising a hole forming step which is performed between the closing step and the communication step and forms a hole through which the through pipe can be inserted. A method of manufacturing a pipe mechanism. A tube structure forming step that is performed before the closing step and connects adjacent portions of the spiral tube to form a tube structure surrounded by the spiral tube;
11. The method of manufacturing a heat collecting pipe mechanism according to claim 7, wherein a liquid flows through the spiral tube and a gas flows through the tube structure. 11.

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