WO2002016832A1

WO2002016832A1 - Floor heater, thermal siphon heat pipe, and method of manufacturing heat pipe

Info

Publication number: WO2002016832A1
Application number: PCT/JP2001/007059
Authority: WO
Inventors: Katsuyuki Kitagawa
Original assignee: Hokko Sohgoh Kaihatsu K.K.
Priority date: 2000-08-18
Filing date: 2001-08-16
Publication date: 2002-02-28
Also published as: JP3765572B2

Abstract

A floor heater, comprising an integral-formed resin insulating panel (10), heat sources (20) laid down on the insulating panel (10), a radiating plate (30) supportedly placed on supporting columns (12) formed integrally with the insulating panel (10), and a heating space formed between the radiating plate (30) and the insulating panel (10), wherein the radiating plate (30) is heated by the heat radiated from the heat sources (20) into the heating space.

Description

TECHNICAL FIELD The present invention relates to a floor heating device, a thermosiphon heat pipe, and a method of manufacturing a heat pipe.

The present invention relates to a floor heating device, a thermosiphon heat source, a top pipe, and a method of manufacturing a heat pipe. Background art

(1) As a conventional floor heating device, as shown in Figures 31Α and 3IB, a panel 90 with a built-in pipe 91 through which hot water flows is laid between a plurality of joists 92, 2 and a panel 90 covered with an aluminum plate 93 are known. In this floor heating device, the panel 90 is brought into contact with the aluminum plate 93 to transfer the heat of the hot water to the aluminum plate 93 and radiate heat from the aluminum plate 93 to heat the room.

(2) FIGS. 32A and 32B show another example of a conventional floor heating device using a heat pipe. This floor heating device is configured such that one end of a plurality of heat pipes 102 is connected to a pipe 101 heated by hot water or the like. The heat pipe 102 is configured by filling a working fluid as a heat transport medium into a pipe whose inside is evacuated. When one end of the heat pipe 102 is heated by the pipe 101, the working fluid evaporates. The evaporated working fluid is condensed at the other end, and heat is exchanged with the outside air or the heat transfer member at the other end to perform heating.

(1) The conventional floor heating devices shown in FIGS. 31A and 31B have the following problems.

(1) As can be seen from Fig. 31B, since the pipe 91 is installed in the narrow groove 94 in the panel 90, even if heat is radiated to the side of the pipe 91, the narrow groove 94 is heated. However, there is a problem that the efficiency of heat transfer to the side of the pipe 91 is extremely low.

(2) The plurality of joists 92 and the panel 90 are separate members, and the number of installation steps such as positioning of the joists 92 increases.

③ Insulation material 96 must be laid between panel 90 and concrete foundation (soil) 95. This is another factor that increases manufacturing costs.

(2) The conventional heat pipe floor heating system shown in Figs. 32A and 32B has the following problems.

This is a method of heating one end of the heat pipe 102, which has poor heat transport efficiency, and the length of the heat pipe 102 is limited. For this reason, the number of heat pipes 102 and the number of heat pipes 101 as heating sources are increased, and there is a problem that the cost increases when the floor area is large. Disclosure of the invention

An object of the present invention is to provide a floor heating device in which the cost of parts is low and the number of installation steps is small.

It is another object of the present invention to provide a thermosiphon heat pipe and a method for manufacturing the heat pipe, which have improved heat transport efficiency.

In order to achieve the above object, a floor heating device according to the present invention includes a resin heat insulating panel integrally formed, a heat source laid on the heat insulating panel, and a support column formed integrally with the heat insulating panel. A heat sink formed between the heat sink and the heat insulating panel; and a heat source that radiates heat from the heat source into the heating space to heat the heat sink.

Further, the floor heating device according to the present invention is a resin heat insulating panel integrally formed, a heat source laid on the heat insulating panel, and a plurality of through holes provided, and a support pillar integrally formed on the heat insulating panel. And a heating space formed between the floor plate and the heat insulating panel, and the air heated by radiating heat from the heat source into the heating space through the through hole is provided to the heating space. Lead to.

As a result, the number of parts can be suppressed and the number of assembly steps can be suppressed, and the period and cost can be reduced.

The positioning member for positioning the heat source may be formed integrally with the support column. It is preferable to provide holes on the heat sink at predetermined intervals to communicate the heating space with the heating space. It is preferable that a lattice-shaped groove is formed in the heat insulating panel, and a pipe-shaped heat source is provided in this groove. It is also possible to surround and connect the support pillars formed on adjacent heat insulation panels. it can. A rug equivalent to one tatami mat whose surface is covered with rug-like pieces may be laid on the upper part of the heat sink.

It is desirable to form a grid-like groove in the heat insulating panel, and arrange a pipe-like heat source in this groove. A concave portion may be formed on the bottom surface of the heat insulating panel.

If a thermosiphon heat pipe is used as the heat source, a floor heating device with high heat efficiency and high space efficiency can be provided.

The outer peripheral edge of the heat insulating panel may be formed of a circular polystyrene foam, and the length of the heat pipe may be different depending on the area where the heat pipe is laid. It is preferable that the heat insulating panel is made of polystyrene foam.

The outer pipe of the thermosiphon heat pipe and the lid may be fixed by caulking or may be fixed by an adhesive. The surface of the heat pipe is preferably coated with ceramics.

In addition, the thermosiphon heat pipe according to the present invention comprises an outer pipe and an inner pipe partially supported in a circumferential direction by a protruding portion projecting from the inner circumferential surface of the outer pipe to the inner diameter side. It has a double pipe.

Thereby, a heat pipe having high heat transfer efficiency can be formed at low cost. Further, the method for manufacturing a heat pipe according to the present invention comprises: extruding a double pipe having an outer pipe and an inner pipe partially supported in a circumferential direction by a protruding portion projecting from the inner circumferential surface of the outer pipe to the inner diameter side. A first step of integrally forming by molding, a second step of closing both ends of a predetermined space between the outer peripheral surface of the inner pipe and the inner peripheral surface of the outer pipe in the pipeline direction with a closing member, And a third step of evacuating the specified space and enclosing a predetermined heat transport medium.

This makes it possible to manufacture a heat pipe without sacrificing thermal efficiency and at a reduced processing cost.

It is preferable that the closing member is formed of resin and adhered to both ends of the double pipe in the pipe direction. The fin members may be radially provided on the outer peripheral portion of the outer pipe by extrusion. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view of an embodiment of a floor heating device according to the present invention. FIG. 2 is a perspective view of a main part of the floor heating device as viewed from a direction II in FIG.

FIG. 3 is a plan view of a heat insulating panel of the floor heating device according to the present invention.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.

FIG. 5 is a cross-sectional view taken along line VV of FIG.

Figure 6 is a view from the line VI-VI of Figure 3.

Figure 7A is a plan view of the heat insulation panel as viewed from the back.

FIG. 7B is a cross-sectional view taken along line bb of FIG. 7A.

FIG. 8A is a perspective view of a connecting member that connects the heat insulating panels.

FIG. 8B is a plan view showing a connection state by a connection member.

FIG. 8C is a cross-sectional view of the connecting portion.

FIG. 9A is a cross-sectional view cut along a plane perpendicular to the axial direction of the heat pipe. FIG. 9B is a longitudinal sectional view of the heat pipe cut along an axial surface.

FIG. 10A is a diagram illustrating heat radiation in a cross section taken along the line IV-IV in FIG. 3.

FIG. 10B is a view for explaining heat radiation in a cross section taken along line VV of FIG. 3.

FIG. 11 is a diagram corresponding to FIG. 3 showing another embodiment of the heat insulating panel.

FIG. 12 is a diagram showing an example of an object laid on a heat sink.

FIGS. 13A and 13B are diagrams illustrating another method of fixing the lid to the outer pipe with an adhesive. 14A and 14B are diagrams illustrating another method of fixing the caulking type lid to the outer pipe. Fig. 15 is a diagram illustrating the jig block and other devices that fill the working fluid by evacuating the pipes of Figs. 14A and B and seal them with a ball.

FIG. 16 is a view showing a modification of the jig block shown in FIG.

FIG. 17 is a diagram illustrating another example of sealing the inside of a pipe.

FIG. 18 is an elevation view of a prefabricated styrofoam dome on which a floor heating device according to the present invention is installed.

FIG. 19 is a plan view of the assembled styrofoam dome of FIG.

FIG. 20 is an internal plan view of the assembled styrofoam dome of FIG.

FIG. 21 is a perspective view showing a dome piece of the assembled styrofoam dome of FIG. 18. Fig. 22A is a plan view showing the heat insulation panel and heat pipes installed on the prefabricated styrofoam dome in Fig. 18. FIG. 22B is an enlarged view of a main part of FIG. 22A.

FIG. 23 is a cross-sectional view showing another example of the double pipe constituting the heat pipe.

FIG. 24 is a diagram for explaining the extrusion molding process.

FIG. 25A is a front view of the dice used to form the double tube of FIG. FIG. 25B is a cross-sectional view taken along the line bb of FIG. 25A.

FIG. 26A is a front view of a lid used for the double pipe of FIG.

FIG. 26B is an enlarged view of a main part showing a state where the lid is attached.

Figure 26C is a perspective view of the lid.

FIG. 27A to FIG. 27C are diagrams showing modified examples of FIG.

FIG. 28 is a diagram showing a modification of FIG.

FIG. 29 is a cross-sectional view showing still another example of the double pipe constituting the heat pipe. FIGS. 3OA to 30C are diagrams showing modified examples of FIG.

Figure 31A is a plan view of a conventional floor heating device.

FIG. 31B is a side view of FIG. 31A.

Fig. 32A is a plan view of a conventional floor heating device.

FIG. 32B is a side view showing the side view of FIG. 32A. BEST MODE FOR CARRYING OUT THE INVENTION

One embodiment of a floor heating device according to the present invention will be described with reference to FIGS. Fig. 1 is a plan view showing the floor heating device with the heat sink removed, Fig. 2 is an exploded perspective view of the floor heating device as viewed from the direction of arrow II in Fig. 1, and Fig. 3 is a heat insulating panel 10 of the floor heating device. FIG. The floor heating system consists of four styrofoam insulation panels 10 placed on the surface of the concrete-soil CB, and eight heat-sifon heat pipes 20 a, 20 held by the insulation panels 10 1 ^ "20 h (hereinafter, sometimes referred to as 20 as a representative), sealing side plates 50 a and 5 Ob surrounding four insulating panels 10 and sealing the inside, and insulating panels 1 And a hot water supply device 40 for circulating hot water through the heat pipe 20. The number of heat insulating panels 10 and the heat pipe 2 are provided. The number of 0s is not limited to that shown in Fig. 1, but may be provided as necessary according to the indoor space to be heated. The heat capacity to be heated is appropriately determined according to the size of the indoor space to be heated, the area, and the like.

Each of the heat insulating panels 10 is formed of a rectangular Styrofoam material having a thickness of about 12 O mm. As also shown in FIGS. 2 and 3, the heat insulating panel 10 is surrounded by grooves 11 A and 11 B formed in a lattice shape orthogonal to each other, and grooves 11 A and 11 B. A bundle 12 and a heat insulating portion 13 at the bottom of the panel are provided.

As shown in FIGS. 4 and 5, the groove 11A has a U-shaped cross section having the pipe outer diameter and width of the heat pipe 20, and one heat pipe 20 is provided for every three grooves 11A. Is arranged. That is, the heat pipes 20 are provided at every third groove 11A. The heat sink 30 is bonded to the upper surface of the bundle 12. Therefore, the bundle 12 has a function of holding the heat sink 30 on the heat insulating panel 10, a function as a cushion material of the heat sink 30, and a function of insulating the heat of the heat sink 30. . The bundle 12 also functions as a member for positioning the heat pipe 20 on the heat insulating panel 10.

The heat radiating plate 30 is, for example, a plywood called a control panel. One heat radiating plate 30 is provided with about 400 holes 30a having a diameter of 8 mm at intervals of 80 mm. When the heat pipe 20 is installed in the groove 11 A extending in the X direction, the upper space of the bundle 12, that is, the predetermined upper space US between the back surface of the heat sink 30 and the heat pipe 20 (FIG. 4) is formed. Further, since the groove 11A communicates with the groove 11B extending in the Y direction, the groove 11B also communicates with the space. Among the grooves 11A, the groove 11A in which the heat pipe 20 is not accommodated also communicates with the space and the plurality of grooves 11B. Therefore, the space U S formed by the heat insulating panel 10, the heat radiating plate 30, and the sealed side plates 50 a and 50 b is one heating space.

The number and interval of the holes 30a are also determined as appropriate, and are not limited to the embodiment. Further, the heat sink 30 may be made of a material other than plywood. For example, a metal plate such as an aluminum plate may be used. It is not essential to open the hole 30a. A metal radiator plate and a plywood may be stacked and used.

In the groove 11 A, the upper half of the outer peripheral surface of the heat pipe 20 faces the above-mentioned space US for almost the entire length in the axial direction, and both left and right outer peripheral surfaces of the heat pipe 20 are grooved by predetermined pitches. It faces 1 1 B. Therefore, as described in detail in FIGS. 10A and 10B, heat is radiated from the heat pipe 20 to the upper space US and the plurality of grooves 11B, and Is warmed.

The expansion ratio of the styrofoam of the heat insulating panel 10 is about 10 to 60 times, preferably 20 to 40 times. The bundle 12 has a square cross-sectional shape with a side of about 50 mm, and the height H 1 (FIG. 4) of the bundle 12 is about 100 mm. The thickness H2 (FIG. 4) of the heat insulating portion 13 is approximately 20 mm. The outer diameter of the heat pipe 20 is 50 mm, the bottom of the groove 11 A is a semicircular shape having a radius of 25 mm, and the width of the groove 11 A is in accordance with the outer diameter of the heat pipe 20. 50 mm. Thus, the heat pipe 20 is fitted into the groove 11A and positioned on the heat insulating panel 10. The above numerical values are for this embodiment, and the floor heating device according to the present invention is not limited to these values. These figures are appropriately determined according to the required heating capacity, which depends on the size of the room and the area.

As shown in FIG. 6, the closed side plate 50b is provided with a hole through which an inner pipe 22 of the heat pipe 20 described later penetrates, and the heat pipe 20 is formed by the closed side plate 50b. Is also positioned. That is, rotation of the heat pipe 20 around the axis is prohibited.

As shown in FIG. 7, lattice-shaped grooves 11C are provided on the rear surface of the heat insulating panel 10 so as to correspond to the grooves 11A and 11B on the front surface. A bundle 14 is formed at the bottom of the panel by the groove 11 C, and the lower surface of the bundle 14 is adhered to the surface of the concrete space C B. As a result, the bonding surface of the heat insulating panel 1 follows the undulations and unevenness of the concrete soil CB, and the adhesiveness is improved. A plurality of circular or rectangular concave portions may be provided on the back surface of the heat insulating panel 10 instead of the lattice-like grooves 14. In this case, a recess may be provided in the lower part of the bundle 12 having a large thickness.

The four heat insulating panels 10 are joined using the connecting members 15. As shown in FIG. 8A to FIG. 8, the connecting member 15 is an octagonal plate-like member having a thickness substantially equal to the depth of the grooves 11A and 11B, and a rectangular through hole 1 5a is provided. Bundles 1 2 1 and 1 2 2 of the edges of adjacent panels (referred to as 10 A and 10 B) are inserted into the through-holes 15 a in close contact with each other, so that the panels 1 Ο Α and Ι 0 B are combined. By connecting the panels in this way, the panel 10 can be positioned accurately. By providing the connecting member 15, the area of the panel top surface, that is, the panel 10 and heat radiation Since the contact area with the plate 30 increases, the force (surface pressure) acting on the panel 10 per unit area from the upper surface of the heat sink 30 decreases, and the strength of the panel 10 improves. FIG. 9 is a diagram showing details of the thermosiphon heat pipe 20. The heat pipe 20 is made of an aluminum outer pipe 21 having a diameter of 50 mm, and an aluminum pipe penetrating the outer pipe 21 as a double pipe and eccentrically provided with respect to the outer pipe 21. An inner pipe 22 having a diameter of 12 mm; an aluminum lid 24 for sealing the vacuum space 23 formed between the inner and outer pipes 21 and 22 and holding the inner pipe 22; And a working fluid 25 filled in the vacuum space 23. The working fluid is filled into the vacuum space 23 such that the upper peripheral surface of the inner pipe 22 is exposed to the vacuum space 23. The inner pipe 22 protrudes through the lid 24, is attached to the lid 24, and is fixed. By fitting the lid 24 coated with the adhesive on the inner peripheral surface to the outer pipe 21, the lid 24 is fixed to the outer pipe 21 with the adhesive BD. The size and shape of the pipes 21 and 22 are not limited to the embodiment.

A hose 26 made of an elastic material is connected to a tip of the inner pipe 22 protruding from the lid 24. The hot water supply device 40 shown in FIG. 1 is connected to the elastic body hose 26, and hot water adjusted to a predetermined temperature is supplied through the inner pipe 22, that is, the heat pipes 20a, 20b-20h. Circulate and return to hot water supply device 40. That is, as shown in FIG. 1, the hot water from the hot water supply device 40 is guided to the entrance IN at one end of the heat pipe 20a and flows into the inner pipe 22. This hot water is led from the outlet OUT at the other end of the heat pipe 20a to the inlet IN of the heat pipe 20d, and flows into the pipe 22 therein. This hot water is led from the outlet OUT at the other end of the heat pipe 20d to the inlet IN of the next heat pipe 20e. The hot water that has passed through each heat pipe 20 returns to the hot water supply device 40 from the outlet OUT of the heat pipe 20b.

The behavior of heat radiation by the heat pipe 20 will be described in detail with reference to FIGS. 1OA and 10B. The working water 25 is heated by flowing hot water through the inner pipe 22 by the hot water supply device 40. The working fluid 25 evaporates when heated. The working liquid 25 evaporated in the vacuum space 23 comes into contact with the upper inner wall surface of the outer pipe 21 to be deprived of heat and condensed. The condensed working fluid 25 travels along the inner wall surface of the outer pipe 21 and returns to the lower part of the vacuum space 23. The heat is radiated from the outer wall surface of the outer pipe 21 thus heated as shown by the arrow. You That is, in the cross section shown in FIG. 1OA, heat is radiated to the space US above the heat pipe 20 only in the groove 11A. In the cross section shown in FIG. 10B, the heat pipe 20 not only radiates heat upward in the groove 11A but also radiates heat to the lateral groove 11B as indicated by the arrow. Thereby, the heating space surrounded by the heat insulating panel 10, the sealing members 50a and 50b, and the radiator plate 30 is warmed by the heat radiation from the heat pipe 20. Then, the heated air in the heating space directly heats the heat sink 30 and is guided upward through the hole 30a. Therefore, if a carpet or a flooring material is provided on the heat radiating plate 30, the carpet / the flooring material is heated and the indoor space is heated.

The portion of the heat radiating plate 30 that is in contact with the bundle 12 is not heated by the air in the heating space, but is heated by the heat transfer inside the heat radiating plate 30. Therefore, if the contact area with the bundle 12, that is, the cross-sectional area of the bundle 12 is too large, the temperature of that part differs from the surrounding temperature. Therefore, when such a temperature difference becomes a problem, the bundle 12A may be thinned as shown in FIG. In FIG. 11, reference numeral 12B denotes a lower portion of the bundle 12A and functions as a positioning member for the heat pipe 20. In this case, the cross-sectional area of the bundle 12A is determined so that the function of the bundle 12A as a cushioning agent is not impaired.

According to the floor heating device according to such an embodiment, the following operation and effect can be obtained.

(1) The heat pipe 20 is positioned by the bundle 12 integrally formed on the heat insulating panel 10 made of styrene foam, and the radiator plate 30 is supported by the bundle 12. Therefore, the function of insulating from the concrete soil CB, the function of supporting the radiator plate 30, and the function of positioning the heat pipe 20 can all be performed by one heat insulating panel 10. As a result, the number of parts and the number of assembling steps can be reduced, and an inexpensive floor heating device that can be installed in a short time can be provided.

(2) The heat was radiated upward from the heat pipe 20 to the left and right sides, and the air in the substantially cross-shaped heating section was heated when the floor heating device was viewed from a plane. Therefore, the heat efficiency is higher than that of a floor heating device that radiates heat only above a pipe-shaped heat source as in the related art.

(3) Since a thermosiphon heat pipe is used, the amount of hot water flowing through the inner pipe 22 can be reduced, and a small and efficient floor heating device can be obtained.

孔 Holes 30a are made in the heat sink 30, so not only the heat dissipation of the heat sink 30 but also the hole 30a The carpet / flooring material can be directly heated by the heated air convection from a, resulting in good thermal efficiency.

回転 Because rotation of the heat pipe 20 around the axis is prohibited by the sealed side plate 50b, the inner pipe 22 of the heat pipe 20 is always located below, and the hydraulic fluid is always heated with hot water. When the heat pipe 20 rotates and the inner pipe 22 is positioned above, the contact area between the working fluid and the inner pipe is reduced, and the heat efficiency is reduced.

溝 Since the groove 14 is provided on the back surface of the heat insulating panel 10, the bonding surface of the panel 10 follows the undulations and unevenness of the concrete soil CB, and the adhesiveness is improved.

⑦Because the panels 10 are connected to each other by the connecting members 15, the panels 10 can be positioned accurately.

A tatami mat may be laid on the heat sink 30. As shown in Fig. 12, a non-slip sheet 16A formed from a laminate of foamed polyethylene and polyfilm, a cushioning material 16B made of foamed polyethylene, and a laminate of nonwoven fabric, charcoal and nonwoven fabric The sheet 16C and the rush-like pieces 16D may be laminated to form a thin tatami mat 16 having a size of one tatami mat, which may be laid on the heat sink 30 and adhered. In this case, the heat radiating plate 30 and the thin plate 16 may be bonded using a double-sided tape for heat resistance. Since the thin tatami mat 16 has the cushion material 16 B, the same elasticity as the tatami mat can be obtained by the elasticity of the cushion material 16 B, and a room with tatami mats can be created at low cost. In addition, since the ionate sheet 16C containing charcoal is placed at the bottom of the stone 16D, the smell in the room can be removed by the deodorizing action of charcoal.

Another method of fixing the lid 24 to the outer pipe 21 will be described. As shown in Fig. 13A, the adhesive BD is applied to the peripheral surface of the frustoconical lid 24A to which the inner pipe 22 is fixed in advance, and this lid 24A is axially attached to the outer pipe 21. Push in from the direction. As a result, as shown in FIG. 13B, the outer pipe 21 is deformed into a taper shape by the lid 24A, and the lid 24A is fixed to the outer pipe 21 by the adhesive BD. Since the inside of the outer pipe 21 is evacuated, the lid 24 A is sucked from the inside of the pipe and the tapered portion is pressed by the deformed taper portion of the outer pipe 21, so that the bonding with the adhesive BD is more reliable. become. As shown in FIGS. 14A and 14B, the outer pipe 21 may be caulked to the lid 24B and fixed. The inner pipe 22 is pre-attached to the lid 24 B via the sleeve 24 1. It is attached. In addition, a collar 24 is provided on the lid 24B. Insert the o-ring 2 43 into the outer ring recess 2 42 of the lid 24 B shown in FIG. 14A. Insert the outer pipe 21 into the lid 24 B so as to cover the outer ring recess 2 42, and crimp the collar 2 42 with a tool (not shown). Thereby, as shown in FIG. 14B, the collar 242 caulks the outer pipe 21, and the lid 24 B is fixed to the outer pipe 21. The O-ring 2 43 is crushed by swaging, and the inside of the pipe is securely sealed.

By fixing the lid 24A or 24B to the outer pipe 21 using caulking or an adhesive as described above, the thickness of the outer pipe 21 can be reduced, thereby reducing the weight and cost. Can be achieved. When connecting the lid 24 and the outer pipe 21 with screws, the outer pipe 21 needs to be thicker.

Next, a heat pipe manufacturing procedure will be described. This manufacturing procedure includes a step of evacuating the inside of a pipe, a step of filling a working fluid, and a step of sealing the inside of the pipe in a vacuum state. This will be described with reference to FIG. The jig block 60 includes a concave portion 60 a to which the material 21 S of the heat pipe 20 in which the lid 24 B is fixed to the outer pipe 21, and a passage 60 opening to the concave portion 60 a. b, an aluminum ball insertion passage 60 c communicating with the passage 60 b, and a vacuum Z liquid filling passage 60 d communicating with the passage 6 O b. The distal end piston 70 a of the driving plate 70 is inserted into the passage 6 Ob. A valve 72 is provided in the aluminum ball inlet passage 60c via a passage 71A. The vacuum Z liquid filling passage 60d is provided with valves 73 and 74 via a passage 71B. The valve 73 is connected to a hydraulic fluid nozzle 75, and the valve 74 is connected to a vacuum pump 76.

First, the valve 72 is opened, and a sealed aluminum ball 77 is loaded into the aluminum ball insertion passage 60c as shown by a two-dot chain line. Close valves 72 and 73, open valve 74, and evacuate outer pipe 21. When the specified vacuum pressure is confirmed by the vacuum gauge 78, the valve 74 is closed. The valve 73 is opened for a predetermined time to fill the outer pipe 21 with a predetermined amount of hydraulic fluid. The steps up to this point are the step of evacuating the pipe and the step of filling the working fluid. All the valves 72 to 74 are closed, and the driving plate 70 is operated in the extracting direction to drop the sealing ball 77 into the passage 6 Ob. Then, press the sealing ball 77 with the driving plate 70, and press the hammer 79 with the driving plate. Hit 70 to fit the sealing ball 77 into the passage 24 1 of the lid 24 B. This is the process of sealing the inside of the pipe in a vacuum.

As shown in FIG. 16, the operation of the driving plate 70 is facilitated by providing the jig block 60 with an indicating ring 80 for indicating the operation position of the driving plate 70. That is, the indicating ring 80 is provided with a contact surface 80a indicating a ball-in position, a contact surface 80b indicating a vacuum / liquid-in position, and a contact surface 80c indicating a driving position. A positioning projection 72 is provided on the operating shaft 71 of the driving plate 70. The driving plate 70 can be operated to a required position in each step only by abutting and locking the positioning projection 72 against each contact surface.

The method of sealing the inside of the outer pipe 21 is not limited to the ball driving method described above. For example, as shown in FIG. 17, the inside of the outer pipe 21 is evacuated through a through hole 242 formed in a lid 24C fixed to the outer pipe 21 with an adhesive. Then, a plug 77A may be driven into the through hole 242 in a vacuum atmosphere to seal the inside of the pipe. In FIG. 17, the outer pipe 21 is fitted into the ring-shaped groove 243 provided on the end face of the lid 24C, and the outer pipe 21 is bonded with the adhesive BD.

The floor heating device described above can be used as a floor heating device for a general house, and can also be used as a floor heating device for a prefabricated styrofoam dome described below. FIG. 18 is an elevational view showing the whole of the prefabricated styrofoam dome, FIG. 19 is a plan view of the dome, and FIG. 20 is a plan view of the inside of the dome. The assembled styrofoam dome 200 is formed by assembling a plurality of dome pieces 210 to 219 made of styrofoam and forming a hemispherical living space SP therein. In FIG. 18, WD denotes a window provided in advance on a predetermined dome piece, and PT denotes an entrance provided in advance on a predetermined dome piece.

Each of the plurality of dome pieces 210 to 219 has a shape as shown in FIG. 21 and is formed of styrene foam having a foaming ratio of 10 to 50 times and a thickness of 10 to 50 cm. . For example, when the snow cover is about 80 cm at the maximum, a dome piece made of styrene foam having a foaming ratio of 20 times and a thickness of 20 cm can be used. In order to obtain the same strength, the thickness is increased by increasing the expansion ratio. In areas where it is not necessary to consider snow cover, the foaming ratio should be larger than 20 times or the thickness should be 20 cm or less. Can be thin below. Conversely, in areas where the snow cover is more than lm, the foaming ratio is reduced to 20 times or less to secure the strength or increase the thickness. Each of the dome pieces 10 to 19 has an L-shaped base DB, joining edges DE and DD rising from the base DB, and a concave top DR at the tip of the joining edges DE and DD. At the top of the dome, such dome pieces 210 to 219 are connected to each other at the top end DR of the dome pieces 210 to 219 by a top joint 221. At the same time, the joining edges DE and DD The dome is assembled by fastening the dome piece to the adjacent dome piece with the fastener 222 and bonding them.

In FIG. 20, a region HR indicated by a two-dot chain line is a region where a heat pipe is laid to perform heating, that is, a floor heating device installation space. Fig. 22A and Fig. 22B are diagrams explaining the state of laying the heat pipe. In FIG. 22A, a plurality of styrene foam insulation panels 110 are arranged on a circular indoor floor. Each of the heat insulating panels 110 disposed in the center of the room has a rectangular shape as shown in FIG. A part of the heat insulating panel 110 disposed on the peripheral edge is circular. Since the heat insulating panel 110 is made of styrofoam, processing on site is extremely easy. The heat insulating panel 110 has a different shape, but has a lattice-like groove 111A, 111B, and a bundle 112 surrounded by the groove 111A, 111B, as shown in Fig. 22B. The points are exactly the same as the insulation panel 10 shown in FIGS. Since it has a circular shape, four types of heat pipes 120a to 120d (hereinafter sometimes represented by reference numeral 120) of different lengths are arranged for each area in the circular room. In the floor heating devices of FIGS. 22A and 22B, those corresponding to the closed side plates 50a and 5Ob shown in FIG. Blocked by pieces 210-219. On the upper surface of the heat insulating panel 110, a heat radiating plate (not shown) having an infinite number of through-holes similar to that shown in FIG. 2 is provided. Then, the heat pipes 120 a to 120 d are connected by a hot water hose 26, and hot water is circulated to the heat pipe 120 by a hot water supply device 40 (not shown). The hot water hose 26 can be routed at an appropriate location. —Next, other shapes of the thermosiphon heat pipe will be described with reference to FIGS. FIG. 23 is a cross-sectional view of the double pipe 320 constituting the heat pipe 300. Double pipe 32 0 has the same cross-sectional shape in the pipe direction. As shown in FIG. 23, the lower outer peripheral surface of the outer pipe 3 21 has a concave shape, that is, the lower inner peripheral surface of the outer pipe 3 21 projects toward the inner diameter side, and the projecting portion 3 2 2 Is provided. A substantially circular inner pipe 3 2 3 is connected to the protrusion 3 2 2, and a vacuum space H is formed between the inner peripheral surface of the outer pipe 3 2 1 and the outer peripheral surface of the inner pipe 3 2 3 . As a result, most of the outer peripheral surface of the inner pipe 3 23 is in contact with the vacuum space H. For example, outer diameter of outer pipe 3 2 1 φ 1 = 25 mm, outer diameter of inner pipe 3 2 3 Φ 2 = 5 mm, wall thickness of pipes 3 2 1 and 3 2 3 t = 1.5 mm, protrusion The apex angle θ of 32 2 is 130 °, and the inner pipe 32 3 is eccentrically provided below in the vacuum space Η.

It should be noted that the dimensions of the above-described double tube 320 are only examples, and the present invention is not limited to this. From the machining point of view, wall thickness t = 0.2 to 5 mm, length in pipe direction 50 cm to 10 m, outer diameter of outer pipe 32 1 φ 1 = 2 O nm! ~ 10 O mm, outer diameter of inner pipe 3 2 3 It is preferable to keep it within the range of φ 2 = 3 mm to 50 mm.If the dimensions are determined according to the place of use, use environment, etc. within this range Good.

Hereinafter, a method of manufacturing the above-described heat pipe 300 will be described according to a manufacturing procedure. (1) Extrusion process

First, the double tube 320 is molded by direct extrusion. In this direct extrusion, as shown in Fig. 24, a billet 3332 made of aluminum as a material is set in a container 331, and the billet 332 is extruded with a stem 3333 while heating. The heating temperature in this case is from 200 ° C. to 600 ° C., preferably from 450 ° C. to 550 ° C. The extruded aluminum penetrates the die 3 35 supported by the die ring 3 3 4. As a result, a molded product having the same shape as the die 335 is formed. The double tube 320 may be formed by pultruding instead of extrusion.

FIG. 25A is a front view of the die 335, and FIG. 25B is a cross-sectional view taken along the line VIII-VIII of FIGS. As shown in Fig. 25A and Fig. 25B, the die 3 35 is composed of the auta part 35a supported by the die ring 33, and the joint part 35b in the circumferential direction (five places in the figure). The first inner part 35 supported by the outer part 35a through the joint 35 and the outer part 35a and the first inner part 35 through a plurality of (four in the figure) joints 35d in the circumferential direction. And a second inner portion 35d supported by the inner portion 35c of the second portion. As shown in Figure 25B, for example Assuming that the length of the die 335 is 10 cm, the joint 35 b is O cn! From the end face on the entrance side in the extrusion direction of aluminum. The joint 35 d is provided in a range of 4 cm to 6 cm. As a result, the aluminum molded product is divided in the circumferential direction when passing through the joints 35b and 35d. However, since the aluminum is extruded at a high pressure (700 t to 800 ot), Immediately after passing through the portions 35b and 35d, they expand in the circumferential direction, and are joined again over the entire circumference. As a result, the double pipe 320 can be molded without being affected by the joints 35b and 35d.

(2) Lid mounting process

Next, the lid 330 is attached to the double tube 320. FIG. 26A is a front view of the lid 330, FIG. 26B is an enlarged view of a main part showing an attached state of the lid 330, and FIG. 26C is a lid 3

FIG. 3 is a perspective view (a view as seen from a double-pipe 320 side) of FIG. The lid 330 is made of resin and is formed by resin molding. As shown in FIGS.2.6A to 26C, the lid 330 is formed of a side wall 3a, an outer pipe portion 3b having an inner peripheral surface having the same shape as the outer peripheral surface of the outer pipe 321, and an inner pipe 3b. It has an inner pipe portion 3c having an outer peripheral surface having the same shape as the inner peripheral surface of the pipe 32, and a joint 3d penetrating through the inner pipe portion 3c and protruding outside the side wall 3a. Outer tube

3b inner circumference and outer pipe 3 2 1 outer circumference and inner pipe 3c outer circumference and inner pipe 3

The inner peripheral surfaces of 23 are fitted via O-rings (not shown). Outer tube

An adhesive is applied between 3 b and the outer pipe 3 21, whereby the lid 3 30 is fixed to the outer pipe 3 2 1. A hose is connected to the joint 3d, and hot water is supplied to the inner pipe 3 23 via the hose.

(3) Vacuum and hydraulic fluid filling process

Next, the pressure in the vacuum space H is released by the vacuum pump 76 through the hole 3 e provided in the side wall 3 a of the lid 330, as in FIG. State. Then, for example, a predetermined amount is inserted into the space H through the hole 3 e so that the upper end of the outer peripheral surface of the inner pipe 3 23 is covered with the hydraulic fluid as the heat transport medium (see FIG. 27A). Fill with hydraulic fluid. The working fluid is, for example, alcohol or water. Finally, a plug 3 f ゃ hard sphere is driven into the hole 3 e with a hammer or the like to close the hole 3 e, and the working fluid is sealed in the vacuum space H. Thereby, the heat pipe 300 is completed.

According to the method of manufacturing a heat pipe according to such an embodiment, the following operation is performed. effective.

(1) Since the double pipe 3200 consisting of the inner pipe 3 2 3 and the outer pipe 3 2 1 was integrally formed by direct extrusion, the man-hours for joining the inner pipe 3 2 3 and the outer pipe 3 2 1 were omitted. The processing cost is kept low and the processing accuracy is small. In this case, a projecting portion 3222 was formed in the lower cross section of the outer pipe 3221, and the inner pipe 3223 was provided there. In other words, since a part of the inner pipe 3 2 3 in the circumferential direction is supported from the outer pipe 3 2 1, the contact area between the hot water and the hydraulic fluid through the inner pipe 3 2 3 is large, and the hydraulic fluid is efficiently Is heated.

(2) Since the lower outer peripheral surface of the outer pipe 3 2 1 is concave and the protruding portion 3 2 2 is provided, the lower cross-sectional area in the vacuum space H becomes smaller, and the working fluid covers the upper end of the inner pipe 3 2 3. The working fluid can be saved when filling. The total height of the heat pipe 300 can be reduced, and it is easy to use in places where there is a height restriction.

③ The lid 330 is made of resin, and the lid 330 is joined to the outer pipe 321 with adhesive, so joining is easier than welding or caulking the lid end. Yes, costs can be reduced.

④Because the inner pipe 3 2 3 and the outer pipe 3 2 1 are integrated in the pipe length direction, the bending rigidity of the double pipe 3 20 is improved.

For example, a pipe section may be formed as shown in FIGS. 27A to 27C. In FIG. 27A, both the outer pipe 3 2 a and the inner pipe 3 2 3 a have a circular pipe shape, and a protruding portion 3 2 2 a is provided upward from the lower inner peripheral surface of the outer pipe 3 21. The inner pipe 3 2 3 a is supported via the projection 3 2 2 a. Since the contact area between the protruding part 3 22 a and the inner pipe 3 23 a is small, the contact area between the warm water and the working fluid via the inner pipe 3 23 a is further increased, and the thermal efficiency is further improved. In this case, for example, the outer diameter of the outer pipe 32 1a φ 1 = 25 mm, the inner diameter of the inner pipe 32 3 a φ 2 = 5 mm, the wall thickness t = 1.5 mm, the protrusion 3 2 2 The height of a is z = 7 mm.

The cross-sectional shapes of the pipes 3 2 1 and 3 2 3 may be triangular, square, or elliptical. For example, as shown in FIGS. 27B and 27C, the outer pipes 3 2 1 b and 3 21 c are formed into a sector shape, and the projections 3 2 2 b and 3 2 2 c provided on the lower inner peripheral surface thereof. The inner pipes 3 2 3 b and 3 2 3 c may be supported through the holes. This reduces the cross-sectional area of the lower part of the vacuum space H. And the amount of hydraulic fluid can be saved. That is, when the hydraulic fluid is filled so as to cover the upper end of the inner pipes 32 3 a, 32 3 b, and 32 3 c in FIGS. 27A to 27C (liquid levels 1, 2, and 3). 3) The hydraulic fluid volume in Fig. 27B and Fig. 27C is smaller than in Fig. 27A. The height h of the double tube 320 is h = 45 mm in Fig. 27B and h = 30 nmi in Fig. 27C. In addition, the tube 3d was molded integrally with the lid 330, but as shown in FIG. 28, the tube 30d was passed through the side wall 3a of the lid 330 to form the inner pipe 3c. It may be screwed inside.

As shown in FIG. 29, a plurality of (seven in the figure) fins 324 may be radially provided on the outer peripheral surface of the outer pipe 321. For example, the fin 324 has a length 1 = 2 O nmi and a thickness t = 0.5 mm. The fins 324 are provided uniformly in the pipe direction, and the fins 324 are also integrally formed by direct extrusion.

Such a double pipe 320 is buried in the ground such as a field, for example, in a ridge. When hot water flows through the inner pipe 3 2 3, the working fluid evaporates and condenses, radiating heat from the outer peripheral surface of the outer pipe 3 2 1 and the fins 3 2 4, heating the soil and promoting the growth of agricultural crops. In addition, it can kill underground pathogens. Note that the fins 324 can be similarly provided in the double pipe 320 shown in FIG. An example is shown in FIG. By providing the fins 324 radially on the outer peripheral surface of the outer pipe 321 as described above, heat dissipation can be improved, and heating can be performed over a wide area such as underground. The rigidity is further improved. In addition, when agricultural work is performed using a scoop with the double pipe 320 buried in the ground, the scoop contacts the fins 324 first, so that the outer pipe 321 can be prevented from being broken.

The outer surfaces of the heat pipes 20, 120, and 300 described above may be subjected to ceramics coating. In this case, far-infrared rays are emitted from the heat pipes 20 and 300, and the heating effect is promoted. Although the heat pipes 20 and 300 are made of aluminum, they may be made of other materials such as steel, iron, stainless steel, titanium and other metals and resins.

In the above description, the heat insulating panels 10 and 110 are formed of styrofoam. However, the heat insulating panel of the present invention is not limited to styrofoam, and can be formed of a resin having heat insulation properties and a cushion function such as urethane. . Also, heat pipe 2 Although a thermosiphon heat pipe was used for 0 and 300, a heat pipe having a wick inside may be used. Instead of a heat pipe, a hot water pipe through which only hot water flows may be used. Alternatively, a heat source that generates heat electrically, such as a nichrome wire, may be used instead of a pipe-shaped heat source.

Although the heat pipes 20 and 120 are positioned at the lower part of the bundles 12 and 112, the heat pipes 20 and 120 may be positioned by another member. Further, instead of the radiating plate 30 made of plywood, a heat insulating floor plate made of styrene foam or the like may be placed on the heat insulating panel 10. In this case, it is essential to open a large number of through holes such as the hole 30a. In other words, since the heat-insulating floorboard does not have a heat radiation effect, the air heated in the heating space is guided to the upper heating space from the through hole, and the carpet / flooring material is warmed from the lower surface. The expansion ratio and thickness of the styrofoam are determined so that the required strength is obtained for the styrofoam floorboard. A gypsum board having a large number of through holes may be used as a floor plate.

Further, in the above embodiment, one hot water supply device 40 is arranged in each room and each dome. However, one hot water supply device for a plurality of rooms and a plurality of domes may be provided outside the room. In this case, a so-called boiler may be used. Industrial applicability

In the above, the example in which the floor heating device is applied to the prefabricated styrofoam dome has been described. However, the floor heating device according to the present invention can be similarly applied to ordinary houses.

Claims

The scope of the claims

1. Insulation panel made of resin that is integrally molded,

A heat source laid on the heat insulation panel,

A heat radiating plate supported and placed on a support pillar formed integrally with the heat insulating panel; and a heating space formed between the heat radiating plate and the heat insulating panel, A floor heating device that radiates heat to the radiator plate.

2. The floor heating device according to claim 1,

A positioning member for positioning the heat source is formed integrally with the support column.

3. The floor heating device according to claim 1 or 2,

Holes communicating the heating space with the heating space are provided at predetermined intervals in the heat sink.

4. The floor heating device according to any one of claims 1 to 3, further comprising a connecting member that surrounds and connects the support columns formed on the adjacent heat insulating panels.

5. The floor heating device according to any one of claims 1 to 4, wherein a rug having a size equivalent to one tatami mat, the surface of which is covered with rush-like rugs, is laid on an upper surface of the heat sink. You.

6. The floor heating device according to any one of claims 1 to 5,

The heat insulating panel has a groove formed in a lattice shape,

The positioning member and the support column are provided surrounded by the groove,

The heat source has a pipe shape provided in at least one direction groove.

7. The floor heating device according to claim 6, wherein The heat insulation panel has a concave portion formed in a lattice shape corresponding to the groove on the bottom surface.

8. The floor heating device according to claim 6 or 7,

The heat source includes: an outer pipe; an inner pipe penetrating the outer pipe as a double pipe; a lid for sealing a vacuum space formed between the inner and outer pipes, and holding the inner pipe; It has a plurality of thermosiphon heat pipes including a working fluid filled in a vacuum space.

9. The floor heating device according to claim 8,

A ceramic is coated on the surface of the outer pipe.

10. The floor heating device according to claim 8 or 9, wherein:

At least a part of the heat-insulating panel is formed of styrene foam having a circular outer periphery, and the plurality of heat pipes have different lengths depending on the area where the heat pipes are laid.

11. The floor heating device according to any one of claims 1 to 9, wherein the heat insulation panel is made of foamed steel.

1 2. Insulation panel made of resin that is integrally molded,

A heat source laid on the heat insulation panel,

A plurality of through-holes, a heat-insulating floor plate that is placed and supported by a support pillar formed integrally with the heat-insulating panel;

A heating space formed between the floor panel and the heat insulating panel,

An underfloor heating device that guides heated air radiated from the heat source into the heating space to the heating space from the through hole.

1 3. The floor heating device according to claim 1, 2. The heat source includes: an outer pipe; an inner pipe penetrating the outer pipe as a double pipe; a lid for sealing a vacuum space formed between the inner and outer pipes, and holding the inner pipe; It has a plurality of thermosiphon heat pipes including a working fluid filled in a vacuum space.

14. The floor heating device according to claim 12 or 13, wherein the heat insulating panel and the floor plate are made of foamed steel.

1 5. Outer pipe and

An inner pipe that penetrates the outer pipe as a double pipe and is eccentrically provided with respect to the outer pipe;

A lid for sealing the vacuum space formed between the inner and outer pipes and holding the inner pipe,

With a working fluid filled in a vacuum space,

A thermosiphon heat pipe in which the lid is caulked and fixed to the outer pipe.

1 6. Outer pipe and

With a working fluid filled in a vacuum space,

A thermosiphon heat pipe in which the lid is fixed to the outer pipe with an adhesive.

1 7. Outer pipe and

A lid for sealing the vacuum space formed between the inner and outer pipes and holding the inner pipe, With a working fluid filled in a vacuum space,

A thermosiphon heat pipe, wherein the inner pipe is partially supported in a circumferential direction over a pipe direction by a protruding portion projecting from the inner circumferential surface of the outer pipe to the inner diameter side.

18. The thermosiphon heat pipe according to any one of claims 15 to 17,

The surface of the outer pipe is coated with ceramics.

19. The first method in which a double pipe having an outer pipe and an inner pipe partially supported in the circumferential direction by a protruding portion protruding from the inner circumferential surface of the outer pipe to the inner diameter side is integrally formed by extrusion molding. Process and

A second step of closing both ends in a pipe direction of a predetermined space between an outer peripheral surface of the inner pipe and an inner peripheral surface of the outer pipe with a closing member;

A third step of evacuating the closed predetermined space and enclosing a predetermined heat transport medium.

20. The method for manufacturing a heat pipe according to claim 20, further comprising a step of resin-molding said closing member, wherein said second step includes connecting said closing member to a conduit of said double pipe. Adhere to both ends in the direction.

21. In the method for manufacturing a heat pipe according to claim 19 or 20,

In the first step, the double pipe is extruded so as to radially have a fin member on an outer peripheral portion of the outer pipe.

22. A heat pipe manufactured by the manufacturing method according to any one of claims 19 to 21.