JPH0615271Y2 - Heat medium rectifying means for a downflow heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is directed to a heat medium rectifying means used in a downflow heat exchanger, in which a heat medium flows on the surface of a heat exchange plate to perform heat exchange, and particularly to a downflow solar collector. The present invention relates to a heat medium rectifying means used in a heater.

(Prior Art) Providing rectifying means in a substantially horizontal direction across the heat exchange plate,
A technique for spreading the water flowing down on the surface of the heat exchange plate to the plate surface by using this rectifying means is well known.

(Problems to be solved by the invention) Since it is preferable that the current plate used in such a method is held in contact with the heat exchange plate while being pressed to some extent, it is necessary to obtain a reaction force of an appropriate size. It is necessary to manage the contact state between the surface of the exchange plate and the tip of the current plate under appropriate conditions. For this reason, conventional straightening vanes have been handled as precision parts that require relatively high precision (for example, Japanese Utility Model Publication No. 63-030926), and when the system scale increases, handling control, quality control, and precision control are required. It requires many means. In particular, this type of management problem is likely to occur during on-site construction.

(Means for Solving the Problem) According to the present invention, the above-mentioned problems of the prior art can be solved by a simple structure which does not increase the cost.
According to the present invention, a fibrous layer is attached to the surface of a core material having a circular cross section, and the fibrous layer comes into surface contact with a relatively constant width on a heat exchange plate, so that a uniform rectifying action follows the core material. I am trying to get it. According to another aspect of the present invention, the elastic deformation layer is interposed between the core material and the fibrous material. When a structure with an elastically deformable layer interposed is used, even if an uneven surface for heat medium flow regulation is formed on the surface of the heat exchange plate, elastic deformation will occur if the rectifying means is pressed against the heat exchange plate with a predetermined force. The layer allows the surface fibrous layer to deform, and the fibrous layer can be forced to conform to this uneven surface.

The rectifying means has a lower height than the conventional one, and even if it is placed on the surface of the heat exchange plate, it does not hinder the heat receiving action.

(Embodiment) FIG. 1 shows a downflow heat exchanger, for example, a downflow heat collector, which uses the rectifying means 1 according to the present invention.

2 to 5 are vertical sectional views perpendicular to the axis of the rectifying means according to the present invention. The rectifying means 1 includes a core material 2 having a circular cross section. The core material is made of, for example, a pipe. The core material 2 includes a fibrous layer 3 around the core material 2.

It is desirable that the core material 2 be composed of a vinyl chloride pipe or a metal pipe. The material of the core material can be selected according to the degree of rigidity required for the material. As the fibrous layer 3, various knitted or woven fabrics made of metal fibers, synthetic fibers or natural fibers, or non-woven fabrics or felts can be used. This fibrous layer has flexibility.

In the rectifying means 1 shown in FIG. 3, the elastic deformation layer 4 is interposed between the core material 2 and the fibrous layer 3.

The rectifying means 1 shown in FIGS. 4 and 5 is a modification of the rectifying means shown in FIGS. 2 and 3, respectively. The rectifying means of these modified examples is different from that of FIGS. 2 and 3 in that a series of nozzle holes 5 are provided in the core material.
Such a nozzle hole 5 can be used as a heat medium supply port, and in this case, the core material is used as a liquid supply pipe.

The elastic deformation layer interposed between the core material 2 and the fibrous layer 3 includes
For example, a foam can be used. When the elastic deformation layer is made of foam, the foam used in the example of FIG. 5 is an open-cell foam. By interposing an elastically deformable layer between the pipe and the fibrous layer, the fibrous layer can be flexibly deformed following irregularities on the surface of the heat exchange plate.

The rectifying means according to the present invention is configured as described above, so that the rectifying means is brought into contact with the heat exchange plate through its own weight or an instrument used as an auxiliary, or the heat exchange plate is brought into contact with the rectifying means. It is used in the form of

The rectifying means that comes into contact with the heat exchange plate forms a contact area along the surface of the heat exchange plate because the rectifying means has a circular outline. The contact area has a band shape in the illustrated example, and a large number of fibers of the fibrous layer contact the surface of the heat exchange plate in the band contact area to subdivide the flow of the heat medium. When used in the manner shown in the drawing, the fibrous layer located above the contact area and continuous to this contact area gradually plays a role of approaching the heat exchange plate surface and suppressing the flow of the liquid. Further, the fibrous layer gradually separates from the heat exchange plate from the contact area toward the rear.

Further, according to the present invention, since the rectifying means has the circular cross section, the same contact state can be always reproduced at the time of installation regardless of the mounting angle (rotational angle about the axis), which is convenient for on-site construction. Also, by rotatably mounting, the contact portion with the heat exchange plate can be moved to a new surface at a necessary time. Even if the heat exchange plate is partially curved instead of being flat as shown, this curved surface can be brought into good contact with the curved surface of the rectifying means, which is convenient.

When the straightening means of each of the above-described embodiments is used for a long heat exchange plate, not only one specific kind but also several kinds can be mixed.

The rectifying means according to the present invention can be reduced by any means as needed.

[Brief description of drawings]

FIG. 1 shows an example of a flow-down type heat collector incorporating the rectifying means according to the present invention. 2 to 5 are vertical sectional views along the axis showing various embodiments of the rectifying means according to the present invention. 1 ... rectifying means, 2 ... core material, 3 ... fibrous layer, 4 ... elastically deformable layer, 5 ... nozzle hole

Claims (4)

[Scope of utility model registration request] 1. A heat medium rectifying means for a downflow heat exchanger, comprising a core material having a circular cross section, and a fibrous layer wound around the core material. 2. A heat medium rectifying means for a downflow heat exchanger according to claim 1, wherein an elastic deformation layer is interposed between the core material and the fibrous layer. 3. The flow-down heat exchanger according to claim 1, wherein the core material is made of a metal pipe, and the elastic deformation layer is made of open-cell foam. Heat medium rectifying means. 4. The heat medium rectifying means for a downflow heat exchanger according to claim 1 or 3, wherein the core material is provided with a series of nozzle holes.