JPS5875673A - Solar heat collector - Google Patents

Abstract

PURPOSE:To place a pipe accurately, enlarge and make uniform the radius of curvature of the pipe, enhance thermal efficiency and reduce the flow resistance of a passage, by providing a pipe-fitting plate provided with pipe-fitting notches at a predetermined pitch, in a solar heat collector for a house. CONSTITUTION:When fitting a plastic pipe 3 to the pipe-fitting plate 24, the pipe 3 in an elongate form is mounted (n) times around a winding jig 31 at a pitch P. The (n) loops of the pipe 3 are fitted respectively into (n) notches 24A of the plate 24, and after removing the jig 31, the pipe 3 is tilted in the direction of an arrow X, and (n) loops of the pipe 3 are fitted respectively into the remaining (n) notches 24A, whereby the pipe 3 is fitted to a main body 22 through the plate 24. At the time of fitting the pipe 3, a frame 23 is detached. After fitting the pipe 3, the pipe 3 is covered by a plastic film X, thereafter the film is fixed by fitting the frame 23, this assembly is fitted to a stand through angles or the like, and inlet and outlet pipes for water are connected to the pipe 3 to complete the heat collector.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar heat collector, in particular, a plastic pipe is attached to a main body made of a heat insulating material and a heat reflecting material, and the outer surface of the plastic pipe is covered with a transparent plastic film. This is a type of solar heat collector that heats water by passing water through it.By attaching plastic pipes to the main body via a pipe mounting plate, the pipes are arranged regularly, improving thermal efficiency and reducing flow path resistance. This article relates to a solar heat collector designed to reduce solar heat.

As is well known, the price of petroleum products has skyrocketed due to the recent two oil crises, and we are now forced to switch from relying solely on petroleum to other energy sources. ing.

On the other hand, in Japan, due to recent changes in eating habits, demand for vegetables such as tomatoes, kirari, and lettuce is extremely strong throughout the year, and greenhouse cultivation of these vegetables is rapidly increasing. In addition to greenhouses for growing vegetables, greenhouses for agriculture and fisheries (hereinafter referred to simply as "houses"), such as greenhouses for growing flowers and hatching young fish, are also available. The area is tens of thousands of hectares nationwide.

Many of these greenhouses require heating in the winter, and heavy oil is conventionally used for heating.
The amount is said to reach several hundred thousand kiloliters per year.

Given the energy situation described above, it is clear that unless some alternative energy source is found for this heavy oil, there will be a serious threat to the lives of the people of Japan.

The applicant has proposed a system that utilizes solar heat to heat the greenhouse, and a solar heat collector, in view of the circumstances beyond those of the past. FIG. 1 is a perspective view showing the general structure of the heat collector, with some parts cut away to show the internal structure. In the figure, a heat collector 1 includes a main body 2, a plastic pipe 3, a plastic film 4, and the like. The main body 2 is made by pasting aluminum foil on the surface of a heat insulating material plate, and is attached via a corrugated iron plate 6 and an angle 7 to a frame 5 in which a pipe is bound with wire.

A wire mesh 8 is attached to the surface of the main body 2, and the hook 8A of the wire mesh 8
The plastic pipe 3 is attached by. The plastic pipe 3 is a long pipe made of a glass material such as polyethylene mixed with carbon powder to increase heat absorption efficiency.

After the plastic pipe 3 is installed, its outer surface is covered with a transparent plastic film 4, and the plastic film 4 is fixed by a rubber band 9 and a stopper 10. Both ends of the plastic pipe 3 are connected to a water inlet pipe 11 and an outlet pipe 12, respectively.

The conventional heat collectors described above are lightweight and easy to disassemble and assemble, so they can be installed in farmlands, etc. that are not used only during the winter, during the winter when IjIL4 solar heat is required. It can be said that this is a heat collector with extremely high effective value.

This conventional heat collector is characterized by its light weight and ease of disassembly and assembly, so by winding a plastic pipe into a ring and reducing the radius of curvature of the ring to a certain extent, the pipe itself is given rigidity. This makes the support and attachment mechanism for the plastic pipe lightweight and simple (suitable targets are placed on the wire mesh). However, this method
Because the radius of curvature is small, there is a disadvantage that the flow resistance increases when water passes through the plastic pipe.Furthermore, since the plastic pipe is wound into a ring depending on the availability, the radius of curvature varies. The disadvantage was that the pipe arrangement inside the heat exchanger was unevenly arranged, resulting in a decrease in thermal efficiency.

An object of the present invention is to eliminate the above-mentioned drawbacks of conventionally proposed solar heat collectors, and to provide a solar heat collector with high thermal efficiency and low travel resistance.

The present invention achieves the above object by attaching a pipe mounting plate, which is a wooden or plastic plate and has pipe mounting notches arranged at a predetermined pitch, to the main body of the heat collector.

Based on the drawings below, '3iIi!' of the present invention! An example will be explained. FIG. 2 is a diagram showing the main body of the heat collector according to the present invention, in which (a) is a plan view, (b) is a front view, and (c) is an enlarged view of the main part of the pipe mounting plate. In the figure, the main body 22 is formed by pasting a heat reflecting plate on a heat insulating material plate, and has a hexagonal shape with chamfered corners of a rectangle with length and width dimensions of approximately 1:2. A frame 23 is removably attached to the periphery of the main body 22, and a pipe mounting plate 24 is attached to the center of the main body 22 in the longitudinal direction. Pipe mounting plate 24
It has a trapezoidal shape with a slightly higher central portion, and is made of wood or plastic, and has 21 & pipe attachment notches 24A arranged at a predetermined pitch P on its upper edge. The cross section of the notch 24A has a shape in which a circle with a diameter d equal to the outer diameter of the plastic pipe 3 is connected with a notch having a width smaller than the width d (see figure e).

The method of attaching the plastic pipe 3 to the pipe attachment plate 24 is as shown in FIGS. 3(A) to 3(C).

That is, the long plastic pipe 3 is wound around the winding jig 31, which is composed of a shaft and a frame, at a pitch of P, by one turn. After fitting the loop of plastic pipe 3 into the tortoise-sized notches 24A of the pipe mounting plate 240 and removing the jig 31, push down the plastic pipe 3 in the direction of arrow X (see figure B). The plastic pipe 3 is securely attached to the main body 22 via the pipe attachment plate 24 by fitting the width into the remaining portions of the notch 24 (see figure (c)). FIG. 4 is a plan view of the main body 22 after the pipe is attached. When installing this pipe, the frame 23 at the periphery of the main body 22 is removed, but after installing the pipe, the outer direction of the pipe is covered with a transparent plastic film 4 (not shown), and then the frame 23 is attached and filmed. 4. After that, as in the conventional example shown above, the angle joints are fixed and attached to the frame, and the water inlet and outlet pipes are connected to the plastic pipes to complete the solar heat collector according to the present invention.

In this example, if the internal dimension in the longitudinal direction of the main body 22 is 2L, the internal dimension in the lateral direction is L, and the outer diameter of the spiral of the plastic pipe 3 is By setting L〈D, there are rings of plastic pipes 3 at approximately equal intervals within the heat collector, so that the pipes are not dense or dense depending on the location, so the thermal efficiency of the heat collector can be increased. According to the results of comparative experiments, the thermal efficiency of this example is 20 inches higher than that of the conventional example. In addition, the outer diameter of the plastic ring is LAD, and the value of L (D) is the assembly,
In consideration of transportation, etc., it is most appropriate to set the value to somm to 1,00028. In the conventional example, the value of this D is approximately 450.
Since it is approximately 1111, this example can greatly reduce the flow path resistance of the plastic pipe compared to the conventional example. In the conventional example, a pump was required to pass water into the heat collector, but in the case of one example, a head of 2 to 3 wL is enough to pass water, and a pump is required. is not necessary. Furthermore, as described above, the use of a jig makes it extremely easy to attach the pipe.

In summary, according to the present invention, it is possible to obtain a solar heat collector with good thermal efficiency and low flow path resistance, and the features of the conventional heat collectors, which are lightweight and easy to disassemble and assemble, can be obtained. It will not be damaged. In other words, there is no doubt that the present invention will be an effective means of protecting the lives of Japanese people in the event of an energy crisis.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the general structure of a conventional solar heat collector, and Figure 2 is a diagram showing the main body etc. of the solar heat collector according to the present invention. Figure 1 (b) is a front view (c) is an enlarged view of the main parts of the pipe mounting plate, Figures 3 (a) to e are diagrams showing how to attach a plastic pipe to the pipe mounting plate, and Figure 4 is an enlarged view of the main parts of the pipe mounting plate. FIG. 3 is a plan view of the main body after installation is completed. 1. Heat collector, 2. Fist body, 3. Plastic pipe, 4. Transparent plastic film.
5... Frame, 111111... Water inlet piping, 12...
...Water outlet piping, 22・Φ・・Main body, 23・・・Frame, 241111@Kyo-bino mounting plate, 24A・・・Kyo notch, 3111・ee jig s 1 Figure jI! Figure (8) #Is diagram (A) /s (C)

Claims (1)

[Claims] A solar heat collector O having the following components from ←) to (d) (α) A main body in which the surface of a heat insulating material plate is coated with a heat reflective material such as aluminum foil (b) A main body C - Pipe mounting plate (C) having a large number of notches (2 pieces) attached to the center of the pipe and arranged at a predetermined pitch; A rolled plastic pipe,
At a part of the outer circumference, the said attachment is attached to half of the notches (road side) of the plate, and then each ring of the spiral is rotated about 90 degrees around the attachment part, and Of these, the one attached to the remaining half a (3 pieces) (d) The plastic pipe (
C) A transparent plastic film attached to cover the surface of the