JPH03290567A - Thawing processing equipment - Google Patents

Abstract

PURPOSE:To improve the extent of heat transfer performance by installing a header constituting an evaporator for a working fluid, plural pieces of condensing pipes constituting a condensing part of the working fluid, a heat exchanger plate being set up in thermal contact with each condensing pipe and an electric heater heating the working fluid, respectively. CONSTITUTION:When an electric heater 14 is energized with current, a working fluid 10 in a header 10 is directly heated and evaporated, absorbing a heating value of the electric heater 14 as an evaporated latent heat, and it flows into the one side of each condensing pipe 12 and moves to the other side from a steam space at the upper part of the header 10. Next, the moved steam is thermally in contact with each pipe 12, and since a side of a heat exchanger plate 13 is low in temperature than that of the electric heater 14, the working fluid is condensed and liquefied, discharging the condensed latent heat to the heat exchange plate 13, whereby this plate 13 is heated, and the liquefied fluid 10 flows back to the inside of the header 10 going along an inner wall of each pipe 12. Successively, snow or the like accumulated on the heat exchanger plate 13 is melted through this plate 13. With this constitution, a heating value of the electric heater is efficiently conductible in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a melting device used for melting snow and preventing freezing of Mm, roads, etc. in cold regions, for example.

[Conventional technology]

An example of a conventional device of this type is the Japanese Patent Publication No. 59-4362.
There is a method disclosed in Publication No. 0, the outline of which is shown in FIGS. 3 to 5.

fll is an evaporation part, (2) is a detail of a plurality of 4s that communicate with the inside of this evaporation part fi+ and extends over the heat transfer part such as the roof (3), and the condensation part (2) is a part of the evaporation part. A plurality of sections are arranged at regular intervals along the longitudinal direction, and the starting section (
1) Located higher up. (4) penetrates the evaporator section +11 in its longitudinal direction, 'M hot water pipe arranged concentrically with the center of the tube of 1 and through which salt water flows inside; and a working fluid such as water or ammonia (7) stored in the gap (6) between the inner wall of the evaporation section fi+
(8) is the brown air generated when the working fluid (5) is heated by the heat of the hot water flowing in the hot water pipe (4), and (8) is the gap (
6) is a steam space above the working fluid (5), (9) is a gutter such as the roof (3), and this gutter (9) has an evaporator section (1).
) is placed.

Next, the operation will be explained. When hot water is passed through the hot water pipe (4), the working fluid (5) in the gap (6) between the inner wall of the evaporator fil and the outer wall of the hot water pipe is heated.

At this time, when the amount of heat added to the working fluid (5) from the hot water pipe (4) increases, steam (7) is generated from the outer wall surface of the hot water pipe 141, and the inside of the evaporator +1i becomes boiling.
The generated steam (7) flows into the working fluid (
5) from the liquid level through the vapor space (8) to a11 part <
Move to 21. By vaporizing the working fluid (5), the heat of the hot water is taken away as latent heat of vaporization. Condensing section (2)
The steam of the working fluid (5) that has moved to the avM section is near the Ip point.

It is cooled by lightning and snow and ice that accumulates on the Jl root (3), condenses and liquefies, and releases the latent heat of condensation into the snow and snow. The liquefied working fluid (gradient) flows along the inner wall surface of the condensing section (2) and reaches the evaporating section 1.
By naturally repeating the action of 0 or more flowing back into the gap A6) between the inner wall of 1) and the outer wall of the hot water pipe (4), the heat of the hot water is transferred to the condensing part (2). , melting of lightning and snow and ice accumulated near the condensing section (2) is performed.

[Problem to be solved by the invention]

However, in the conventional device described above, the working fluid (5) in the W generator part (1) is heated by heat conduction from the hot water pipe (4) that extends longitudinally through the evaporator part (1). The heat transfer efficiency was extremely poor, and the heat of the hot water was not effectively used to melt snow and ice, but instead was exhausted, significantly reducing heat transfer performance. In addition, the piping configuration for supplying hot water was complicated.

The purpose of the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to obtain a melting processing apparatus with a simple structure and high heat transfer performance.

[Means to solve the problem]

The melting processing apparatus according to the present invention includes a header in which a differential fluid is stored and which serves as an evaporation section for the differential fluid, and a header that is provided in communication with the inside of the header and extends to a heat transfer target section for evaporating the working fluid. A plurality of condensing pipes forming the condensing section, a heat exchanger plate arranged in thermal contact with each of these condensing pipes and on which snow and ice accumulates, and a heat transfer plate arranged to penetrate through a header to heat the working fluid in the header. It is equipped with an electric heating element.

[Effect]

iI in this invention! The kM processing device directly heats the working fluid in the header with an electric heating element, and can quickly transport the amount of heat from the heating element to each condensing tube and efficiently conduct heat to the heat exchanger plate.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In each of these figures, Ql is a header in which a working fluid is stored and forms the evaporation part of the working fluid αυ, and (2) is a header that is provided in communication with the inside of this header α and extends to the heat-transferred part. A plurality of condensing tubes forming the condensing part of the working fluid αυ, (2) is a heat exchanger plate placed in thermal contact with each of these condensing tube bends and on which snow and snow and ice accumulate;
It is an electric heating body that penetrates through the header and is placed immersed in the working fluid aυ, and directly heats the working fluid inside the header αΦ. Figure 1 shows the case of the electric heating body (2) consisting of a sheathed heater as an example. still.

Although not shown, heat leakage from the heat exchanger plate 0 can be prevented by arranging a heat insulating material on the lower surface side of the heat exchanger plate 0.

Next, the operation will be explained. When the electric heating element (2) is energized, the working fluid (II) in the header (2) is directly heated and vaporized, absorbing the amount of heat from the electric heating element (2) as latent heat of vaporization, and expelling each fluid from the vacuum space above the header (a). It flows into one side of the condensing pipe O and moves to the other side. The vapor of the working fluid αD that has moved to each of these condensing pipes O is condensed because the heat transfer @ (to) placed in thermal contact with each of these condensing pipes O is lower than the heat of the electric heating element (2). It liquefies and releases its latent heat of condensation to the heat exchanger plate 0 from each condenser pipe bend. This condensed latent heat heats the heat exchanger plate 0 and increases its temperature. The liquefied working fluid QD flows along the inner wall surface of each contraction tube (2) and flows back into the Hephda a@.The operation of 0 or more is naturally repeated, and the amount of heat held by the heating body (2) increases to 1. The heat is transported to each condenser tube (2), and the heat is efficiently and effectively conducted from each condenser tube O to the entire heat exchanger plate αj, and the snow accumulated on the heat exchanger plate 0 through the heat exchanger plate α opening. It is possible to efficiently and effectively melt snow and water. In addition, by changing the heating of 1 working fluid α from the indirect method using hot water supply from the hot water pipe (4) to the direct heating method using the electric heating element (2), II1
No water piping equipment is required, and the FJul configuration significantly increases the ability to melt snow and ice.

In the above embodiment, the electric heating body (2) is made of a sheathed heater, but it goes without saying that the electric heating body (2) may be made of other heaters.

In addition, although the above embodiment describes the case where it is applied to snow melting on roofs, it goes without saying that the present invention can also be applied to snow melting, freezing prevention, and icicle prevention on building rooftops, parking lots, the road surface of elevated bridge 1W beams, roads, etc. This means that the same effect as in the above embodiment is achieved.

〔Effect of the invention〕

As explained above, the present invention includes a header in which a working fluid is stored and forms an evaporating part for the working fluid, and a header that is provided in communication with the inside of the header and extends to a heat transfer part and forms a condensing part for the working fluid. A plurality of condensing pipes, an electric heating plate arranged in thermal contact with each of these condensing pipes and on which snow and ice accumulates, and an electric heating element arranged to penetrate inside the header and heat the working fluid in the header. The working fluid in the header 7 is directly heated by the electric heating element, and the amount of heat from the electric heating element can be quickly transported to each condensing tube, and heat can be efficiently conducted to the electric heating plate, so the heat transfer performance is improved with a simple configuration. It is possible to obtain a high melting processing device.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing a melting processing apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line n-II in FIG. 1, and FIG. 3 is a perspective view showing a conventional melting processing apparatus. Figure 4 is a sectional view taken along Figure 3 rV-IV Figure 5 is a cross-sectional view taken along Figure 3 V-V
FIG. In the figure, αO is a header, αυ is a working fluid, a21 is a condensing tube, αj is a heat transfer plate, and (4) is a heat transfer body. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A header in which a differential fluid is stored and forms an evaporation part for the differential fluid; and a plurality of condensing pipes that are provided in communication with the inside of the header and extend to a heat transfer part to form a condensation part for the working fluid. and a heat exchanger plate placed in thermal contact with each of these condensing pipes and on which snow or snow and ice accumulates, and an electric heating element placed penetrating through the header and heating the working fluid in the header. A melting processing device characterized by: