JPS58130959A - Solar heat collector - Google Patents

Abstract

PURPOSE:To prevent a concentrated pressure impressed locally upon being frozen by a method wherein a plurality of heat collecting tubes, arranged in right-and-left direction in parallel, and a descending tube, communicated with the heat collecting tubes at the lower ends thereof, are formed so as to have the same diameter and configuration in the sections thereof, further, they are arranged in the same plane. CONSTITUTION:Heat collecting tubes 1 and descending tubes 2 are arranged in parallel in up-and-down direction, fins 3 are formed between the tubes and at the peripheral rims of the collector. An upper header 3 is provided at the upper end of each heat collecting tube 1 and a lower header 5 is provided at the lower end of each heat collecting tube 1 and the descending tube 2, while all of the tubes and the headers are formed integrally by means of blow forming. The heat collecting tubes 1 and the descending tube 2 are formed so as to have elliptic sections having the same diameters and the longer diameters thereof are located in the same plane to form the collector A while water is circulated naturally through a water feeding tube 7 and a hot-water feeding tube 6. According to this method, all of the water is frozen uniformly when the water in the tubes is frozen and the pressure will never be concentrated locally, therefore, the breakage of the tubes may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a solar heat collector, more specifically, a solar heat collector, which includes a plurality of heat collecting pipes running vertically, and a downcomer pipe communicating with the lower end of the heat collecting pipe O, which runs vertically alongside the heat collecting pipes. The present invention relates to a solar collector in which water passed through a pipe into a collecting pipe is heated by solar heat.

In the conventional Munokame solar heat collector, as shown in Figure 1, the diameter of the descending pipe (2) is larger than that of the collecting pipe (1). When the water in the downcomer pipe (2) freezes, the water in the heat collecting pipe 11) will freeze first, and the increased volume of water due to freezing will be pushed out to the downcomer pipe (2). As a result, the downcomer pipe (2) may be damaged due to this pressure, and the joint between the downcomer pipe (2) and the fin (3) shown in Figure 2 is particularly frequently damaged. In addition, the heat collecting pipe (fil) and the downcomer pipe (2) are often formed into one continuous shape by blow molding, and as mentioned above, the diameter of the heat collecting pipe (1) is the same as that of the downcomer pipe (2). If it is smaller than the diameter, the wall thickness of the downcomer pipe (2) will be small, so if you try to obtain the wall thickness necessary to give the downcomer pipe (2) a predetermined strength t, the wall thickness of the heat collecting pipe 11 will also be smaller. In addition, due to the difference in diameter between the heat collecting pipe (1) and the downcomer pipe, the case (+1)
As shown in Figure 3, when the heat collecting pipe (1) located near the downcomer pipe (1) was placed inside the case (9), it rose from the bottom surface of the case (9), and the collector trapped under its own weight could become trapped.

The present invention has been developed in view of the above-mentioned points, and its main purpose is to prevent pressure from concentrating on a specific part of the pipe wall when the water inside freezes. Another purpose is to provide a solar heat collector t' that does not unnecessarily increase the wall thickness of the tube wall; The purpose is to prevent it from bending due to its own weight inside the case.

Hereinafter, an explanation will be given based on the embodiment tFg[tl of the present invention. In the solar heat collector according to the present invention, a plurality of heat collecting pipes (11) running vertically are arranged side by side, and the lower end of each heat collecting pipe (1) is provided with a downcomer pipe (11) running vertically. is in communication and sent into the heat collecting pipe fil through the downcomer pipe (2).
The collector pipe (1) and the downcomer pipe (2) are formed in the same shape with substantially the same diameter in cross section at an angle in the longitudinal direction, and the collector pipe (1) and the downcomer pipe (2) are formed in the same shape and have approximately the same diameter.
It is characterized by being arranged along the flat ffn. ! ! As shown in the pores in Figure 4, the heat collecting pipe Ill and the downcomer pipe 1
! ) is integrally shaped by blow molding. Heat collecting pipe (
1) and downcomer pipes (both run vertically and are parallel (lined up) left and right. Between each heat collecting pipe (1), heat collecting pipe flll and downcomer pipe 1
Fins (3) are formed on the periphery surrounding the heat collecting pipe +1) and the descending pipe (t).The upper end of each heat collecting pipe 11 has an upward vine (4) running left and right Communication, heat collection pipe (1
) and the lower end of the downcomer pipe (ri) is a downward ivy that runs left and right (
6). A hot water supply pipe (6) projects upward from one longitudinal part of the upward vine (4), and a water supply pipe (1) projects upward from the upper end of the descending pipe (2). Ivy to the top (4)
slopes downward from one end of the hot water supply pipe +81 in the longitudinal direction toward the other end. However, the water that passes through the water supply pipe +71 k and enters the downcomer pipe (downhill pipe t611-) enters the heat collecting pipe (1), is heated by solar heat in the heat collecting pipe (1), and flows inside the heat collecting pipe +1). Rise, vine upwards +4) tA
The water is drawn out from the embroidery pipe (61).

Tokorochi, 11 heat'1lll) Toro downcomer (Ritoha, 1
As shown in Fig. 14(b) K, one section (8) is formed into an ellipse shape with the same diameter n, and its major axis 7 is located on the same plane.

As shown in FIG. 5, the n-th collector (8) constructed in this way is used as a natural circulation type water heater by being housed in the case +ill together with the -2 pair and connected to the tank (ll). Inside the tank (@), as shown in Figure 6, the upper end of the water supply pipe (6) is located below the upper end of the hot water supply pipe (6), and the tank (8) is located below. Water at low temperature is sent to the collector and heated,
) The upper water supply pipe (6) is designed to collect high temperature water discharged from the water supply pipe (6). As a result, water circulation is accelerated by the specific gravity of the water in the tank (8). In the above example, the downcomer pipe is one tree, but as shown in Figure 7, the downcomer pipe is increased by +!1t-2 or more than 70 to increase the descending flow rate and improve the circulation propulsion force. I can give you that.

As described above, in the present invention, the heat collecting pipe and the downcomer pipe are formed in the same shape with substantially the same diameter in the cross section perpendicular to the longitudinal direction, so that when the water in the pipe freezes, the whole part freezes uniformly. This may cause pressure to be concentrated in one area and cause the pipe to break.
It has the advantage that there is no distortion, and since the Kujo heat tube and the downcomer tube have the same diameter, the pu-o-! It has the advantage that the wall thickness of the tube wall can be made equal when molding by the IT shape, and that the wall thickness of the tube wall can be set so as not to be too thick or too short. Furthermore, since the heat collecting pipe and the downcomer pipe are shaped to have the same cross-sectional shape with the same diameter and are arranged along the same plane, the lower surfaces of the collectors are aligned on the same plane, and even when placed in the case, a portion of The collector will not lift up and the collector will not bend under its own weight.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are a front view and a cross section taken along the line A-A in FIG. 1(a), respectively, and FIG. 2 is a partial cross-sectional view of the conventional example. ! Figure 3 is an explanatory diagram of the operation of the conventional example, and Figure 4 (a) (
b) is a front view showing one embodiment of the present invention, and the same figure -)
Middle B-Blfr surface view, Figure 5 is hot water using improvement*1
-Front view, shown! Figure IP+6 is a partial front view of a water heater using the above, and Figure 7 is a front view showing another embodiment of the present invention. +11 is a heat collecting pipe, and (2) is a downcomer pipe. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] ill There are multiple heat collection pipes running up and down on the left and right.
, a collector in which the lower jaw of a downcomer pipe running vertically alongside the heat collecting pipe is connected to the lower jaw of each heat collecting pipe, and the water sent through the downcomer pipe and into the heat collecting pipe is heated by solar heat; A solar heat collector characterized in that the heat collecting pipe and the downcomer pipe are formed in the same shape with substantially the same diameter in cross section perpendicular to the longitudinal direction, and are arranged along the same plane.