JPH03290573A - Thawing processing equipment - Google Patents

Abstract

PURPOSE:To improve the extent of heat transfer performance by forming a heat exchanger plate where snow lies, an evaporating part storing a working fluid, a header being interconnected to this evaporating part, a condensing part in thermal contact with the heat exchanger plate, and an electric heater heating the working fluid, respectively. CONSTITUTION:An electric heater 14 is energized with current and thereby a working fluid in an evaporating part 11 is directly heated and vaporized, absorbing a heating value of the electric heater 14 as a steam latent heat, and this fluid flows into the one side of a condensing part 13 from a steam space of a header 12, then it is moved to the other side. Next, a side of a heat exchanger plate 10 set up in thermal contact with the condensing part 13 is lower in temperature than heat of the electric heater 14, so that steam is condensed and liquefied, discharging the condensed latent heat to the heat exchanger plate 10 from each condensing part 13, and the plate 10 is heated whereby snow on the plate is thus melted. Then, the liquefied working fluid goes along a wall surface of the condensing part 13 and flows back to the inside of the evaporating part 11 from the header 12. With this constitution, the extent of heat transfer performance is improvable in a simple structure.

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 roofs, roads, etc. in cold regions, for example.

[Conventional technology]

As a conventional device of this kind, for example, Japanese Patent Publication No. 5943620
There is a method disclosed in Japanese Patent Publication No. 2003-110013, and its outline is shown in FIGS. 3 to 5. In each of these figures, (1) is an evaporation section, and (2) is a plurality of condensation sections that communicate with the inside of this evaporation section (1) and extend above the heat transfer area, such as the roof (3). A plurality of condensing sections (2) are arranged at intervals along the longitudinal direction of the evaporating section (1), and are located above the evaporating section (1). (4) is a hot water pipe that passes through the evaporator (1) in its longitudinal direction and is arranged concentrically with the pipe center of the evaporator (1), through which hot water flows; (5) is the hot water pipe (4); The working fluid (7), such as water or ammonia, is stored in the gap (6) between the outer wall and the inner wall of the evaporator (1), and (7) is the amount of heat of the hot water flowing through the hot water pipe (4) as the working fluid (5). (8) is the working fluid (6) in the gap (6).
5) The upper steam space (9) is a gutter, such as the roof (3), in which the evaporator (1) is arranged.

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 (1) and the outer wall of the hot water pipe (4) 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 of the hot water pipe (4), and the inside of the evaporator (1) is in a boiling state. becomes.

The generated steam (7) flows into the working fluid (
5) through the vapor space (8) to the condensing section (2).
). That is, by vaporizing the working fluid (5),
The heat of the hot water is taken away as latent heat of vaporization. The vapor of the working fluid (5) that has moved to the condensing part (2) is cooled by the snow and snow and ice accumulated near the condensing part (2), that is, the roof (3), condenses and liquefies, and transfers the latent heat of condensation to the snow and snow. Release inside.

The liquefied working fluid (5) flows along the inner wall surface of the condensing section (2) and reaches the gap (
6) Reflux within. By naturally repeating the above operations, the heat of the hot water is transferred to the condensing section (2), and the snow and ice accumulated near the condensing section (2) are melted.

[Problem to be solved by the invention]

However, in the conventional device described above, the working fluid (5) in the evaporator (1) is heated by heat conduction from the hot water pipe (4) that extends longitudinally through the evaporator (1). As a result, 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 dissipated, resulting in a significant reduction in 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 configuration and high heat transfer performance.

[Means to solve the problem]

The melting processing apparatus according to the present invention includes: a heat transfer plate on which snow and snow and ice accumulate; an evaporation section in which a working fluid is stored; a header arranged in correspondence with the heat transfer plate and communicating with the evaporation section; A condensing section that branches out from this header and extends toward the heat exchanger plate and is in thermal contact with the heat exchanger plate, and an electric heating element that is disposed through the evaporator and heats the working fluid in the evaporator. It has been established that

Another type includes a heat exchanger plate, an evaporator, a header, and a condenser, and a hot water heat source that houses the evaporator and heats the evaporator.

[For production]

The melting treatment apparatus according to the present invention can heat the working fluid in the evaporation section using an electric heating element or a hot water heat source, and can quickly transport the amount of heat from the header to each condensation section, and can efficiently conduct heat to the heat exchanger plates.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, α0) is a heat exchanger plate on which snow and snow and ice accumulate, αD is an evaporation part in which working fluid is stored, and is located below the heat exchanger plate α0).

(L■ is a header that communicates with the evaporation part αυ, and the heat exchanger plate (
10) are arranged to extend parallel to the length direction of. α
Reference numeral 3 denotes a plurality of condensing portions each branching from the header α and extending toward the heat exchanger plate α0), and are arranged in thermal contact with the heat exchanger plate α0). α4 is an electric heating element that is disposed to penetrate through the evaporation section C11l and directly heats the working fluid in the evaporation section C11l. .

Although not shown, if a heat insulating material is placed on the lower surface of the heat exchanger plate (10), heat leakage from the heat exchanger plate (00) can be prevented.

Next, the operation will be explained. When the electric heating element α4 is energized, the working fluid in the evaporator part Oυ is directly heated and vaporized, absorbs the heat of the electric heating element 04 as latent heat of evaporation, and flows into one side of each condensing part from the steam space of the header α. Move to the other side. The vapor of the working fluid that has moved to each of these condensing parts 03 is condensed and liquefied because the temperature of the heat transfer plate α0) arranged in thermal contact with each of these condensing parts α3 is lower than that of the electric heating element α4. Latent heat is released from each condensing section 03 to the heat exchanger plate Cl0). This latent heat of condensation heats the heat exchanger plate α0) and increases its temperature.

The liquefied working fluid flows along the inner wall surface of each condensing section (13) and flows back from the header (1'2) into the evaporating section uD. By naturally repeating the above operation, the amount of heat held by the electric heating element 0φ is reduced. The heat is transported from the header (1z) to each condensing section α3, and furthermore, the heat is efficiently and effectively conducted from each condensing section α3 to the entire heat exchanger plate (10), and the heat exchanger plate α0 ) It is possible to efficiently and effectively melt the snow and snow and ice that has accumulated on the surface.

In addition, by changing the heating of the working fluid from an indirect method using hot water supply from the hot water pipe (4) to a direct heating method using the electric heating element α4, hot water piping equipment and hot water supply equipment are not required, resulting in a simple configuration. can significantly increase the ability to melt snow and ice.

Incidentally, in the above embodiment, the case where the electric heating body α4 is made of a sheathed heater is described, but the electric heating body 0 made of other heaters may also be used.
Of course, there may be ψ.

Further, as shown in FIG. 2, the evaporator <11) is housed in the hot water heat source α9 by immersing it in the warm water, and the evaporator 01) is heated by the hot water, and the evaporator CI is heated. As a result, the working fluid therein may be heated, producing the same effect as the steam embodiment.

In addition, although the steam embodiment describes the case where it is applied to snow melting on roofs, it goes without saying that this invention can also be applied to snow melting, anti-freezing, and icicle prevention on building rooftops, parking lots, elevated bridges, bridge surfaces, roads, etc. This means that the same effect as the steam embodiment is achieved.

〔Effect of the invention〕

As explained above, this invention comprises a heat exchanger plate on which snow or snow and ice accumulates, an evaporator in which a working fluid is stored, a header arranged in correspondence with the heat exchanger plate and communicating with the evaporator, and a condensing section that is arranged in a plurality of branches from the header and extending toward the heat exchanger plate and is in thermal contact with the heat exchanger plate; and an electric heating element that is arranged to penetrate through the evaporator section and heat the working fluid in the evaporator section. By providing this, the working fluid in the evaporator section can be directly heated, the amount of heat can be quickly transported from the header to each condensing section, and heat can be efficiently conducted to the heat transfer plate, so the heat transfer performance can be improved with a simple configuration. A high melting processing device can be obtained.

Another method is to provide a heat exchanger plate, an evaporator, a header, and a condensing section, and a hot water heat source that houses the evaporator and heats the evaporator, so that the evaporator is heated by hot water, and this heating The working fluid in the evaporation section is heated, and the heat from the hot water heat source can be quickly transported from the header to each condensing section, and the heat can be efficiently transferred to the heat transfer plates, making it possible to create a melting treatment device with a simple configuration and high heat transfer performance. Obtainable.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a melting processing apparatus according to an embodiment of the present invention, FIG. 2 is a perspective view showing a melting processing apparatus according to another embodiment of the invention, and FIG. 3 is a perspective view showing a conventional melting processing apparatus. A perspective view, Figure 4 is a sectional view taken along the line ■-■ in Figure 3, and Figure 5
The figure is a sectional view taken along the line V-V in FIG. 3. In the figure, α0) is the heat exchanger plate, ell) is the evaporation part, α■
is a header, 03 is a condensing section, 0φ is an electric heating element, and αS is a hot water heat source. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A heat transfer plate on which snow or snow and ice accumulates, an evaporation section in which a working fluid is stored, a header arranged in correspondence with the heat transfer plate and communicating with the evaporation section, and a header connected to the header. A condensing section which is arranged in a plurality of branches to extend toward the heat exchanger plate and is in thermal contact with the heat exchanger plate, and a condensing section which is arranged to penetrate into the evaporator section and heat the working fluid in the evaporator section. A melting processing device characterized by being equipped with an electric heating element. (2) A heat exchanger plate on which snow and snow and ice accumulate, an evaporator in which a working fluid is stored, a header arranged in correspondence with the heat exchanger plate and communicating with the evaporator, and a header from the header to the evaporator. A condensing section which is arranged in plural branches and extending toward the heat exchanger plate and is in thermal contact with the heat exchanger plate, and a hot water heat source that accommodates the evaporator and heats the evaporator. A melting processing device characterized by: