JPS61285348A - Solar heat water heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 2. Industrial application field The present invention relates to a solar water heater.

b. Prior Art A solar water heater usually consists of a water injection means and a drainage means, each of which has a plurality of intersecting pipes.

Problems to be Solved by the Invention However, it has been found that problems may arise in pipes and waterways during use.For example, since the flow of water is controlled by pipes, they can generate pressure, which is not necessarily the case. Unable to find the channel of least resistance.

The present invention provides a solar water heater that reduces pressure related problems compared to prior art solar water heaters.

Means for solving the d1 problem and its function According to the present invention, the upper and lower panels are connected in a face-to-face arrangement, and the water injection means is introduced into the space between the panels, and the water injection means is derived from the space between the panels. At least one of the panels is provided with a solar water heater formed of an array of depressions defining drainage channels laid down in the vertical and horizontal directions.

As commonly practiced, the solar water heater of the present invention:
During use, the receiver is placed at an angle to the horizontal in order to receive sufficient radiation from the sun to facilitate convection of the water flow within the water heater. In this case, the water injection means is led to the lower end of the water heater and is arranged so as to supply, in principle, relatively cold water, and the drainage means is led from the upper end of the water heater, in principle, to drain relatively warm water. The water heater of the present invention may include an inlet/drain header to facilitate more even distribution of water to the water heater and facilitate a more even draining of hot water from the water heater; however, the use of the header may It is not given much importance as it has drainage channels set up vertically and horizontally.

The depressions could be arranged in a square array so that there are multiple parallel lateral flow channels intersected by multiple parallel longitudinal flow channels; The recesses could be arranged in an array to include components extending diagonally across the surface of the water heater plate, but a set of channels would extend parallel to each other in one direction. The lower end panel of the water heater of the present invention, on the other hand, is completely flat, while the upper end panel is formed with a recess. However, if both panels are provided with the required vertical and horizontal flow channels,
It can be formed into a hollow shape. Forming a dimple with the top panel has the added benefit of increasing its surface area and thus increasing its ability to absorb solar radiation.

The top of each recess is spot welded to an adjacent area of the opposing plate to facilitate holding the plates together.

Preferably, however, the corresponding edges of the panels are also seam welded so that the water heater component can be constructed in a watertight manner.

In this regard, the panels are made of metal, such as stainless steel material. However, the top panel could be formed of other materials such as stainless steel, aluminum or copper.
The lower end panel, on the other hand, is formed from the stainless steel mentioned above or other suitable material.

The thickness of the metal panel is preferably 0.5 to 0.7 cm, and further,
The uppermost panel in use generally contains a solar radiation absorbing coating layer and is selected to utilize selective surfaces for this purpose.

The solar water heater of the present invention may be used for hot water, particularly for industrial hot water, and for space heating and cooling.

e. Example The invention will now be described with reference to the accompanying drawings.

According to the accompanying drawings, a substrate I is constituted by a casing 10 made of aluminum, for example, and surrounded by an upright peripheral wall 14.
2 and further including a lidless part.

The interior of casing 10 is partitioned with a layer of insulation 16, such as polyethylene foam.

A solar water heater plate 18 according to the invention is disposed on an insulating layer overlying the substrate 12. Water heater plate 1st, flat 1st
It comprises a lower end panel 20 and a second upper end panel 22 formed by a rectangular array of recesses 24. A recess 24 is spot welded to the first panel 2o as shown at 26 and is connected to the panels 20 and 22.
are simultaneously seam welded at each periphery as shown at 28. This seam welding makes the space defined by the first panel 20 and the second panel 22 watertight.

Furthermore, the water heater plate 18 is composed of a water injection means 3o at one end and a water drainage means 32 at the other end. Water injection means and drainage means communicate with the space between panels 2o and 22 in the usual manner.

The recesses 24 are arranged in a rectangular array that defines longitudinal water flow paths in the direction of arrow B and lateral water flow paths in the direction of arrow A shown in FIG. .

A framework 34 is attached to the upper end of the side wall 14 and is attached to the water heater plate 18.
The surrounding framework 34 also provides means for attaching a glass pane 36 by means of a glass-fitting gasket 38.

During use, the water heater plate 10 is mounted on a slope with the end having the water injection means 30 at the lowermost end. Cold water is on panels 20 and 22
It penetrates into the space between them and is heated by solar radiation. In this regard, the panel 22 may include a selective coating layer to enhance the heating effect. The heated hot water moves towards the drainage means 32 by convection. Any one of the longitudinal flow channels defined by the depression 24
If one becomes blocked, hot water can easily move laterally through the lateral flow channel to find another vertical flow channel.

f. Effect of the invention. Thus, reducing the risk of reduced water heater efficiency due to material corrosion and superacidity. Modifications and alterations that are obvious to a person skilled in the art are within the scope of the invention. It will be recognized.

Embodiments of the invention are as follows.

(1) A solar water heating device or a solar space heating and cooling device characterized by being constituted by a solar water heater defined in any one of the claims.

[Brief explanation of drawings]

FIG. 1 is a plan view of a rectangular solar water heater plate according to the invention. FIG. 2 is an elevational view of the manufacturing section side of the water heater plate of FIG. 1, viewed from the direction of arrow A. 3 is an elevational view of the short side of the water heater plate of FIG. 1, taken in the direction of arrow B; FIG. 4 is a fragmentary cross-sectional view taken in the direction of arrow A through the water heater of FIG. 1; FIG. 10...Casing, 12...Substrate, 14
... Peripheral wall, 18 ... Solar water heater plate, 20, 22 ... Panel, 24 ... Hollow, 30 ... Water inlet, 32 ... Drain port.

Claims (1)

[Claims] 1. A first panel comprising first and second panels connected together in a face-to-face arrangement, a water injection means extending into the space between the panels, and a drainage means leading out from the space between the panels; two panels are formed flat, the first panel being formed with a row of indentations defining a flow channel in the space between the panels, the flow channel having a first set of flow channels extending parallel to each other in one direction; A solar water heater characterized by comprising a second set of flow channels that extend parallel to each other in the other direction and intersect with the first set of flow channels. 2. Claim No. 2, comprising a rectangular casing having a substrate, a peripheral wall, and a lidless portion, the lidless portion being closed with a glass plate, and a panel disposed between the substrate and the glass plate. The solar water heater according to item 1. 3. The solar water heater according to claim 2, wherein the panel is disposed on an insulating material layer covering the substrate. 4. The solar water heater according to any one of claims 1 to 3, wherein the top of the recess is spot-welded to the adjacent panel. 5. Solar water heater according to any one of claims 1 to 4, characterized in that corresponding edges of the panels are simultaneously seam-welded in a watertight manner. 6. A patent characterized in that the recesses are formed in a rectangular array such that the first set of flow channels extends laterally and the second set of flow channels extends longitudinally in the space between the panels. A solar water heater according to any one of claims 1 to 5.