JPS5846369Y2 - solar heat collector - Google Patents

Description

[Detailed description of the invention] This invention moves the high-temperature heat medium heated by the solar collector to the heat storage tank, while the low-temperature heat medium from the heat storage tank is supplied to the heat collector, and repeats this process. This invention relates to an improvement of a solar heat collecting device in which a high temperature heat medium is stored in a heat storage tank.

Generally, a heat medium is circulated between a heat collector and a heat storage tank by a circulation pump, and the circulation pump is operated when the temperature of the heat medium at the outlet of the heat collector exceeds a certain temperature.

However, since the heat medium is not moving, the temperature of the heat medium at the outlet of the heat collector is not accurate, and variations in time lag and the like occur.

In particular, when the heat collector is installed horizontally, natural convection is difficult to occur, causing further inconvenience.

This will be explained based on the diagram of the operating state of the pump with respect to solar radiation in FIG. 6. The horizontal axis represents a certain period of time during the day, and the vertical axis represents the amount of solar radiation and the output of the pump.

That is, Fig. 6A shows the amount of solar radiation, and the opening shows the start/stop of the pump.

As is clear from this figure, even though there is sunlight and the heat medium in the collector is sufficiently heated, the temperature of the heat medium at the outlet of the collector rises with a time delay, making it difficult for the circulation pump to operate. It was done with a time delay.

In short, the pumps were not turned on and off accurately in proportion to solar radiation, making efficient heat collection impossible.

The present invention was devised in view of this point, and is designed to operate the pump accurately when the heat medium is heated even when the heat medium is not moving.One embodiment will be explained below with reference to the drawings. .

1, 1... is a transparent outer tube 2 made of soda glass whose both ends are sealed with a sealing plate 3 to make the inside a vacuum, and a heat medium tube 5 made of a copper heat collecting member 4 is coaxially connected. A plurality of heat collecting elements are arranged in parallel with both ends protruding from the sealing plate 3, and both ends are connected by a connecting member 6 to constitute a heat collector A.

Reference numeral 7 is a heat storage tank that is connected to the heat collector A through a circulation path 8 and stores the heat medium heated by the heat collector A. Inside, there are piping 9, which is connected to a water heater, a heating heat exchanger, etc. (not shown). A heat exchange coil connected at 10 is provided, and the structure is such that it is heated by the heat medium.

11 is a circulation pump inserted in the circulation path 8, which moves the high temperature heat medium from the heat collector A to the heat storage tank 7 and supplies the low temperature heat medium in the heat storage tank 7 to the heat collector A. be.

Reference numeral 12 denotes a plurality of heat collecting elements 1, 1, . . . that constitute the heat collector A.
A heat collection detector is attached to any one of the heat collection members 4 in a heat transfer manner to detect changes in the temperature of the heat collection member 4.

Reference numeral 13 denotes a control section operated by the heat collection detector 12, which controls starting and stopping of the circulation pump 11.

Next, the operation will be described. When the entire heat collector A receives radiation, the heat collecting member 4 of each heat collecting element 1, 1, . . . is heated.

Therefore, the heat collection detector 12 provided on the heat collection element 1 is heated by receiving heat transfer from the heat collection member 4 at the same time as the heat medium, and is heated by the output from the special heat detector 12 when the heat medium reaches a certain temperature. The control unit 13 operates to start the circulation pump 11 to move the high temperature heat medium in the heat collector A to the heat storage tank 7, and conversely supply the low temperature heat medium in the heat storage tank to the heat collector A.

As described above, the present invention does not start or stop the pump 11 depending on the temperature of the heat medium at the outlet of the heat collector A, but instead uses a heat collector attached to the heat collecting member 4 that heats the heat medium in the heat collector A. heat detector 1
2, the pump is started and stopped as soon as the temperature of the heat medium in the heat collector becomes high, and efficient heat collection is possible without the time delay unlike in the past.

FIG. 5 shows the output state of the heat collection detector and the pump on/off state in response to solar radiation according to the present invention, where the horizontal axis represents a certain period of time during the day, and the vertical axis represents the amount of solar radiation and output.

In Figure 5, A shows the amount of solar radiation, the port shows the start/stop of the pump, and C shows the output from the heat collection detector.

As is clear from FIG. 5, according to the present invention, the pump can be started more quickly, so that the operating time is longer than in the conventional system, and a heat medium at a predetermined temperature can be obtained in a short time.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the solar heat collector of the present invention, Fig. 2 is a perspective view of an embodiment of the heat collector used in the present invention, and Fig. 3 is a heat collector constituting the heat collector of Fig. 2. A perspective view of the element, FIG. 4 is a sectional view of FIG. 3, and FIG. 5 is an explanatory diagram showing the output state of the heat collection detector and the operating state of the pump with respect to the amount of solar radiation in the present invention.
FIG. 6 is an explanatory diagram showing the operating state of the pump with respect to the amount of solar radiation in the conventional device. A... Solar heat collector, 12... Heat collection detector, 11... Circulation pump, 7... Heat storage tank, 8...・Circulation route.

Claims (1)

[Scope of utility model registration request] A heat collector that combines a plurality of heat collecting elements each having a heat medium path made of a heat collecting member installed in a translucent outer tube, a heat storage tank that stores the heat medium from the heat collector, and circulation that communicates between the two. a circulation pump inserted in the circulation path to circulate a heat medium, and a heat collection detector that controls the start and stop of the pump, and the heat collection detector includes a plurality of heat collection elements constituting the heat collector. A solar heat collecting device which is attached to the heat collecting member of any one of the heat collecting elements in a heat transfer manner.