JPH08271060A - Heat exchanger - Google Patents

Abstract

PURPOSE: To provide a heat exchanger of a simple form in which a heating medium liquid trickle surface and a storage tank of storing the liquid are formed by using flexible sheet materials. CONSTITUTION: A part of the peripheral edge of a sheet material 4 is supported in the state raised higher than the other part by using a flexible material 4 to form an oblique heat exchanging surface 2 having a recess 3 deviated to one side, a heating medium liquid is sprinkled at least at the part of the peripheral edge of the oblique surface 2, the sprinkled liquid is fed along the oblique surface to be stored in the recess.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow-down type heat exchange device constructed by using a flexible sheet material.

[0002]

2. Description of the Related Art A synthetic resin sheet material is used.
Planar water-passing mats having parallel water passages and water-filled bags are well known. The roof-mounted pump-type heat collector, which has been sold, has a structure in which water is stored in a synthetic resin bag and exposed to direct light.

[0003]

[Problems to be Solved by the Invention]
The water-filled bag has poor pressure resistance, and has a drawback that water leakage occurs due to deterioration of the material and is used for a relatively short period of time. In addition, it is difficult to repair water leaks and the service life is generally short. Especially large ones (those with large water storage) are difficult to manufacture.

[0004]

A flow-down pumping type heat exchange apparatus according to the present invention uses a flexible sheet material, and a part of the peripheral edge of the sheet material is lifted higher than other parts. By supporting in a state, an inclined heat exchange surface having an uneven recess is formed, the heat medium liquid is sprinkled on at least a part of the peripheral portion of the slanted heat exchange surface, and the sprinkled heat medium liquid is dispersed. It is configured to flow down along the inclined surface and collect in the depression.

[0005]

According to the structure described above, a continuous downflow heat exchange surface having a desired width and length and having an arbitrary inclination angle is formed. The size of the sheet material (heat exchange area) can be freely selected, and the volume of the depressions continuous to this flow-down path can also be selected according to the required load.

[0006] The operation of recovering the heat medium liquid is performed simultaneously with the heat exchange toward the depression, and there is practically no heat medium liquid being recovered which is not involved in the heat exchange. An efficient and continuous heat exchange operation is performed.

An absolute watertight structure such as a conventional water-permeable mat / water-filled bag is not required, and even if the material is torn, it can be easily repaired by adhering a reinforcing seal cloth to the inner surface of the damaged portion. It can be used for a long period of time with reinforcement if necessary.

The above-mentioned apparatus has a simple structure in which the lower surface and the heat retaining storage tank are integrated regardless of the size of the sheet material. Since the falling heat exchange surface is made of a sheet material that can be easily processed, the heat exchange area, its three-dimensional shape, and the volume of the depression can be freely selected. An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The apparatus shown in FIG. 1 is constructed from a flexible sheet material. In the example shown, the sheet material forms an inclined heat exchange surface 2 over which the transparent sheet material 4 covers. The heat transfer medium 2 is sprayed onto the inclined heat exchange surface 2 by using a spraying means (not shown) such as an injection nozzle or a porous pipe. The dispersed heat transfer medium liquid flows down along the inclined heat exchange surface and collects in the recess 3 of the inclined surface.

When tap water for collecting heat is used as the heat medium liquid, the solenoid valve is intermittently opened and closed by using a timer, and tap water is regularly sprayed on the heat exchange surface before the end of heat collection. It is also possible to perform an operation such that a predetermined amount of warm water is accumulated in the depression 3, or in addition to such an operation, or separately from such an operation, the water accumulated in the depression is repeatedly sprayed onto the heat exchange surface 2.

A sheet material having a rectangular shape, a circular shape, an elliptical shape or any other shape is used, and the sheet material is fixed at a predetermined position by using an appropriate mount so as to correspond to the shape of each sheet, the strength of the sheet material and the storage tank capacity. Has been done. For example, the side edge of the sheet material may be held by an inclined ring-shaped frame, and the depression may be formed at a position offset from the center to the front. It is also possible to form a storage container by supporting the front and rear side edges of a rectangular sheet material to form a loose tub-shaped container and appropriately lifting the sheet material located on both ends of the tub. The support structure for the sheet material can be arbitrarily selected.

The embodiment shown in FIG. 2 is the first except that a part of the heat exchange surface 2 is lifted to form a long downflow path.
It is basically the same as the one in the figure. As the sheet material, for example, various flexible sheet materials such as a fiber reinforced resin sheet and a rubber sheet are selected and used.

In order to reduce the amount of heat radiated from the back side surface of the sheet material, a heat insulating layer is attached to at least the portion corresponding to the depression. The sheet material preferably has a certain degree of heat insulating property in order to reduce the amount of heat radiated from the lower surface as much as possible. For example, a soft urethane foam layer can be adhered to the entire back side of the sheet material.

In addition to the above structure, a foaming device 5 for discharging foam can be further provided. Foaming device 5
Can supply bubbles to the upper surface of the heat carrier liquid accumulated in the depression. The bubbles are supplied to the surface of the heat carrier liquid and spread in layers to form a heat insulating layer covering the surface of the heat carrier liquid.

For example, when the illustrated heat exchange device is used as a heat collecting device for preheating the washing water of a large aircraft, when the load is in the middle of the night, a surface active agent is previously mixed in the heat medium liquid, After the end of heat collection, the liquid surface of the medium liquid may be mechanically agitated and foamed by a screw or the like to be discharged.

[0016]

According to the construction as described above, it is possible to obtain the downflow heat exchange device having a simple structure in which the heat exchange surface and the heat retaining storage tank are integrated regardless of the size of the sheet material. In fact, since the heat exchange surface is made of a continuous sheet material, the heat exchange area can be freely selected and the depression volume can be set freely as well. Further, an absolute watertight structure like a conventional water bag is not required, and repair can be easily performed by, for example, bonding a repair seal cloth to a side to which water pressure is applied, even if the material is broken. The repair period can be extended. According to the present invention, even a large-capacity large-sized heat exchange device can be installed relatively easily. In addition, if necessary, water moss and the like can be removed and cleaned easily, and there is no problem in hygiene maintenance.
There is an advantage that the device can be disassembled and the position can be moved quickly.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a heat exchange device according to the present invention.

FIG. 2 is a schematic explanatory view showing a modified example of the heat exchange device according to the present invention.

[Explanation of symbols]

 1 heat exchange device 2 inclined heat exchange surface 3 dent 4 transparent sheet material 5 foaming device

Claims (2)

[Claims] 1. A slanted heat exchange surface having an uneven depression by using a flexible sheet material and supporting a part of a peripheral portion of the sheet material in a state of being lifted higher than other parts. Heat exchange liquid is formed on at least a part of the peripheral edge of the inclined heat exchange surface, and the dispersed heat medium liquid is made to flow down along the inclined surface to be stored in the depression. apparatus. 2. The heat exchange device according to claim 1, further comprising a foaming device for discharging bubbles to an upper surface of the heat medium liquid accumulated in the depression.