JP2797892B2 - Heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating apparatus that uses an electric heater as a heat source and uses a heat pipe to prevent snow melting, deicing, and freezing on a road surface, for example.

[0002]

2. Description of the Related Art FIG. 9 is a cross-sectional view showing a heating device constituted by a conventional electric heater heating type heat pipe disclosed in, for example, Japanese Patent Publication No. 62-651. In FIG. Is an inner cylinder, 3 is a working chamber formed between the outer cylinder 1 and the inner cylinder 2, 4 is a working fluid filled in the working chamber, and 5 is an outer cylinder 1
The fins and 6 are provided with a cap for closing the opening of the outer cylinder 1 and these 1 to 6 constitute the heat pipe 7. Reference numeral 8 denotes an electric heater housed in the inner cylinder 2 and electrically connected to the outside via a lead wire 8a.

Next, the operation will be described. After the working chamber 3 between the outer cylinder 1 and the inner cylinder 2 is evacuated, a predetermined amount of the working fluid 4 is filled. When electricity is supplied to the electric heater 8 housed in the inner cylinder 2, the working fluid 4 is heated by the electric heater 8, turns into steam, moves from the heating section to the other end side of the working chamber 3, and moves over the entire heat pipe 7. To transfer heat across Thereby, the deposits in contact with the periphery of the heat pipe 7 are uniformly heated.

[0004]

The conventional heating device constituted by the electric heater heating type heat pipe is constructed as described above. Therefore, when a trouble such as disconnection of the heater or lowering of insulation resistance occurs, the inner cylinder is heated. When removing the electric heater inserted in the heat pipe, it is necessary to secure a space for taking out the heater in the axial direction from the cap of the heat pipe. In particular, when the heater is used for heating a pavement on a road, it is necessary to secure a space for taking out a heater for replacing the heater on the road surface, which has a disadvantage that an actual heating area is reduced. It is necessary to increase the pavement excavation area in anticipation of
There was a problem that the construction cost was high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a heating apparatus which requires only a small space for attaching and detaching an electric heater and can reduce the construction cost when replacing the heater. I do.

[0006]

Means for Solving the Problems Claim 1 according to the present invention.
Is a heat pipe in which a working fluid is sealed, an electric heater arranged in parallel with one end of the heat pipe and serving as a heating source of the working fluid, and one end of the heat pipe and the electric heater sandwiched therebetween. And a heat transfer block made of a good heat conductive member that can be divided at the holding surface.

A heating device according to a second aspect of the present invention provides a loop-type heat pipe in which a working fluid is sealed in a loop-shaped interior and which is disposed in a substantially horizontal direction, and a heating fluid that is juxtaposed to a predetermined portion of the heat pipe. It comprises an electric heater serving as a heating source, and a heat transfer block made of a good heat conducting member that sandwiches a predetermined portion of the heat pipe and the electric heater, and that can be divided by a sandwiching surface.

According to a third aspect of the present invention, there is provided a heating device according to the first or second aspect, wherein a portion of the heat pipe that contacts the holding surface of the heat transfer block with respect to the heat pipe is partially enlarged. It was made.

According to a fourth aspect of the present invention, in the heating apparatus of the second aspect, the internal section of the heat pipe is provided in a pipe between the heating portion in contact with the holding surface of the heat transfer block and the bent end portion of the heat pipe. Is provided with a partition plate formed so as to partition substantially the upper half of the above.

According to a fifth aspect of the present invention, in the heating apparatus of the second aspect, the diameter of the pipe is reduced to a small diameter between the heating portion in contact with the holding surface of the heat transfer block and the bent end portion of the heat pipe. It is formed by forming.

A heating device according to a sixth aspect of the present invention is the heating device according to the first or second aspect, wherein the heating portion of the heat pipe that contacts the holding surface of the heat transfer block is stepped downward. is there.

[0012]

According to the first aspect of the present invention, since the electric heater is arranged in parallel with the heat pipe via the divided heat transfer block, the electric heater can be disassembled by moving in the lateral direction and can be easily attached and detached in a narrow space. To

According to the second aspect of the present invention, the loop shape of the heat pipe improves the heat transport without causing the working fluid and the steam to flow in opposite directions.

According to the third aspect of the present invention, the heating section in which the pipe diameter of the heat pipe is partially increased increases the heat receiving area and improves heat transport.

Further, in the fourth and fifth aspects, the partial flow path or the pipe diameter of the internal flow path is narrowed at a position near the heating portion of the loop heat pipe, so that the flow direction of the steam flow is regulated and the working fluid is returned. To promote.

Further, according to the present invention, the heating portion of the heat pipe is formed to have a step on the lower side, so that the working fluid is effectively pooled and the heating portion is prevented from withering.

[0017]

[Embodiment 1] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating a configuration of a heating device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating an example in which the heating device according to the first embodiment is embedded in a pavement. In the drawing, 9 is a heat pipe formed of a heating section ( evaporating section) 9a and a heat radiating section ( condensing section) 9b, in which a working fluid 10 is sealed and disposed in a substantially horizontal direction in this case. Heating unit 9
an electric heater, such as a sheath heater, which is arranged in parallel with a and serves as a heating source of the working fluid 10; Having a clamping surface 12b
c is a heat transfer block that is integrated by sandwiching the heat pipe 9 and the electric heater 11 with a fastening device 13 such as a bolt, and 14 is a pavement such as a road surface.

Next, the operation will be described. The one end heating section 9a of the heat pipe 9 and the electric heater 11
2, which is buried in the pavement as a heating device and is used for melting and freezing the surface of the pavement. The operation will be described with reference to FIG. The working liquid 1 in the heating section 9 a of the heat pipe 9 is heated by the electric heater 11.
Numerals 0 are vaporized 10a, take the heat of the electric heater 11 as latent heat of evaporation, pass through the inside of the heat pipe 9, and move to the heat radiating portion 9b embedded in the road surface 14. Heat radiating section 9 of heat pipe 9
The vapor 10a of the working liquid that has moved to b releases latent heat of condensation on the road surface 14. This operation is repeated spontaneously, and accordingly, the amount of heat of the electric heater 11 is reduced by the heat pipe 9 on the road surface 14.
And heats the road surface to prevent snow melting and freezing of the road surface 14. Since the electric heater 11 is in contact with the heat pipe 9 through the two-part heat transfer block 12, when the electric heater 11 fails, the electric heater 9 can be easily removed in a small space by loosening the tightening bolts 13 and the like. be able to.

Embodiment 2 FIG. In the first embodiment, the case where a single pipe is used as the heat pipe 9 has been described. However, as shown in FIG. 3, the heat pipe 15 may be formed in a loop shape. By using such a loop-type heat pipe, the number of heat pipes to be manufactured (operations for evacuation, liquid filling and the number of heaters) can be halved, and the manufacturing cost can be reduced. In addition, the flow of the vapor generated by heating by the electric heater does not face the flow direction of the condensed liquid, so that a large amount of heat can be transported without causing the liquid to dry out in the evaporating section. .

Embodiment 3 FIG. Further, in the first and second embodiments, the case where the heat pipes 9 or 15 have the same overall pipe diameter is shown. However, as shown in FIGS. 4 and 5, the heating sections 16a and 17a of the heat pipes 16 and 17 are provided. A large amount of heat transport can be performed by increasing the heat receiving area by increasing the diameter of the tube, that is, increasing the diameter of the tube.

Embodiment 4 FIG. In the second embodiment, the working fluid flow path of the heat pipe 15 is fully open. However, as shown in FIG. 6, a substantially upper half of the internal cross section of the heat pipe is provided in the pipe between the heating section and the loop bending end. By providing the partition plate 18 formed so as to partition the liquid, the flow of the vapor can be regulated in a certain direction to promote the reflux of the liquid.

Embodiment 5 FIG. Further, in the second embodiment, the working fluid flow path of the heat pipe 15 has the same diameter as the whole path. However, as shown in FIG. Heat pipe 1 provided with throttle pipe 19a
9, the same effect as in the fourth embodiment may be obtained.

Embodiment 6 FIG. In the first and second embodiments, the heat pipe 9 or 15 has been shown to extend at the same level over the entire length. However, as shown in FIG. 8, the heating part 20a of the heat pipe is separated from the heat radiating part 20b of the heat pipe. The heater may be formed to have a step below, and the heating unit may be formed as a working fluid reservoir to prevent the heating unit from withering.

Embodiment 7 FIG. In the above Examples 1 to 7, the outer peripheral portion of the heat transfer block 12 is shown as an exposed surface.
The heat transfer block 12 is formed by covering the outer peripheral portion with a heat insulating material.
It is possible to prevent wasteful heat radiation from the heat transfer unit to the surroundings, to transmit all the heat of the heat transfer block to the heating unit of the heat pipe, and to obtain a heating device with extremely good thermal efficiency.

[0025]

As described above, according to the first aspect of the present invention, there is provided a heat pipe having a working fluid sealed therein, and an electric heater disposed in parallel with one end of the heat pipe and serving as a heating source of the working fluid. , And a heat transfer block made of a good heat conducting member that can be integrated with one end of the heat pipe and the electric heater and can be divided at the holding surface, so that the electric heater can be disassembled by moving in the horizontal direction and attached and detached in a narrow space Thus, there is an effect that a heating device that can simplify the heating and reduce the cost of replacing the heater can be obtained.

According to a second aspect of the present invention, there is provided a loop-type heat pipe in which a working fluid is sealed in a loop-like interior, which is disposed in a substantially horizontal direction, and the working fluid is juxtaposed at a predetermined portion of the heat pipe. And a heat transfer block made of a good heat conducting member which sandwiches a predetermined portion of the heat pipe and the above-described electric heater, and which can be divided at the sandwiching surface. However, there is an effect that a heating device in which heat transport is improved without facing the flow direction of the steam of the working fluid can be obtained.

According to a third aspect of the present invention, in the heating apparatus according to the first or second aspect, the diameter of a part of the heating portion of the heat pipe that is in contact with the holding surface of the heat transfer block is formed to have a large diameter. As a result, there is an effect that a heating device in which the heating portion having a partly larger diameter of the heat pipe increases the heat receiving area and improves heat transport is obtained.

According to a fourth aspect of the present invention, in the heating device of the second aspect, the inside of the heat pipe is provided in the pipe between the heating portion in contact with the holding surface of the heat transfer block and the bent end portion of the heat pipe. A partition plate formed so as to partition a substantially upper half portion of a cross section. According to claim 5, the heating device and the loop bending end portion which contact the holding surface of the heat transfer block with respect to the heat pipe in the heating device according to claim 2. Since the diameter of the pipe is reduced to a small diameter, the flow direction of the steam flow is regulated, the recirculation of the working fluid is promoted, and a heating device having improved heat transport is obtained.

According to a sixth aspect of the present invention, in the heating device according to the first or second aspect, the heating portion of the heat pipe that contacts the holding surface of the heat transfer block is formed so as to be stepped downward. Therefore, there is an effect that a heating device that can prevent the working fluid from running out in the heating section and improve heat transfer can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a configuration of a heating device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state in which the heating device according to the first embodiment of the present invention is embedded.

FIG. 3 is a perspective view illustrating a configuration of a heating device according to a second embodiment of the present invention.

FIG. 4 is a perspective view illustrating a configuration of a heating device according to a third embodiment of the present invention.

FIG. 5 is a perspective view illustrating a configuration of a heating device according to a third embodiment of the present invention.

FIG. 6 is a perspective view illustrating a configuration of a heating device according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view illustrating a configuration of a heating device according to a fifth embodiment of the present invention.

FIG. 8 is a partial perspective view illustrating a configuration of a heating device according to a sixth embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a heating device including a conventional electric heater-heated heat pipe.

[Explanation of symbols]

 Reference Signs List 9 heat pipe 9a heating section (condensing section) 9b heat radiating section (evaporating section) 10 working fluid 10a steam 11 electric heater 12 heat transfer block 12c split section 13 fastening device 14 pavement body 15 heat pipe (loop-type heat pipe) 16, 17 Heat pipes 16a, 17a Heating section (condensing section) 18 Partition plate 19 Connecting pipe (throttle pipe) 20a Heating section (stepped heating section) 20b Heat radiating section

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E01C 11/26 E01H 5/10 F28D 15/02 F02D 15/02

Claims (6)

(57) [Claims] 1. A heat pipe for internal working fluid is sealed, and the electric heater is arranged at one end of the heat pipe becomes a heating source of the working fluid, one end and the electric heater data of the heat pipe And a heat transfer block made of a good heat conducting member that can be separated by the holding surface. 2. A loop-shaped heat pipe which is disposed in a substantially horizontal direction and has a working fluid sealed in a loop-shaped interior;
The electrical heater is arranged in a predetermined portion of the heat pipe becomes a heating source of the working fluid, the predetermined unit and the electric heater motor and integrated by sandwiching a good thermal conductive member divisible by the clamping face of the heat pipe And a heat transfer block. 3. The heating device according to claim 1, wherein the heat pipe is formed such that a pipe diameter of a heating portion that contacts the holding surface of the heat transfer block is partially large. . 4. A heat pipe is a partition plate formed in a pipe between a heating portion in contact with a holding surface of a heat transfer block and a bent end portion so as to partition a substantially upper half of an internal cross section of the heat pipe. The heating device according to claim 2, comprising: 5. The heat pipe according to claim 2, wherein the diameter of the tube is reduced to a small diameter between the heating portion in contact with the holding surface of the heat transfer block and the bent end portion of the loop.
A heating device according to claim 1. 6. The heating device according to claim 1, wherein the heat pipe is formed such that a heating portion that contacts the holding surface of the heat transfer block has a step below.