JPH0129486Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a solar heat collector, and particularly to a solar heat collector suitable for accurately detecting the temperature of a heat medium in a passageway.

[Conventional technology]

In conventional solar heat collectors, as a means of detecting the temperature of the heat medium in a pipe-shaped water passage, a sensor tube whose outer surface is in contact with the water passage is fixed to the fin with a caulking bet, and a temperature sensor is inserted into the sensor tube. A device configured to detect the heating medium temperature is disclosed in Japanese Utility Model Application Publication No. 59-163869.

[Problem that the invention attempts to solve]

When the above-mentioned conventional technology is applied to a solar heat collector composed of a tube-in-sheet type heat collecting plate, the contact area between the sensor tube and the water passage becomes a point, and the contact area is small and the temperature of the heat medium in the water passage is reduced. Since heat cannot be accurately conducted to the sensor tube, there has been a problem in that the detection accuracy of the temperature sensor is reduced. Furthermore, since the entire tube-in-sheet type heat collecting plate serves as a passage for the heat medium, there is a risk that the heat medium may leak if the sensor tube is fixed with a caulking bet.

An object of the present invention is to provide a solar heat collector in which the contact area between the water passageway and the sensor tube is increased.

[Means for solving problems]

In order to achieve such an objective, the present invention provides a solar heat collector including a header fixed to a heat receiving box and a heat collecting plate consisting of a plurality of water passages, in which at least one water passage among the plurality of water passages is provided. An arc-shaped recess is formed in the recess, a sensor tube containing a temperature sensor is inserted into the recess, and a sensor fixture is provided for elastically fixing the sensor tube.

[Effect]

According to the above configuration, the sensor tube housing the temperature sensor in the concave portion of the water passage is pressed into tight contact with the sensor fixture due to the elastic action of the sensor fixture. As a result, the contact between the sensor pipe and the water passage becomes a surface contact, which increases the contact area, so that the heat medium temperature in the water flow passage is accurately conducted to the sensor pipe, and the detection accuracy of the heat medium temperature of the temperature sensor is improved.

[Example] The present invention will be described below based on an example shown in the drawings.

The main components of the solar heat collector 1 include a heat receiving box 2, a transparent body 3, a tube-in-sheet type heat collecting plate 5, a heat insulating material 6, a temperature sensor 8, and a sensor fixture 9. The heat receiving box 2 is formed into a box shape with an upper opening, and the transparent body 3 is made of glass and is fixed to the upper surface of the heat receiving box 2 so as to cover the opening of the heat receiving box 2. The heat collecting plate 5 includes a plurality of water passages 10 through which a heat medium passes, and a sheet portion 1 that connects the water passages 10.
1, and a header 12 fixed to the heat receiving box 2.
is attached to.

The temperature sensor 8 is housed in the inner peripheral surface of the tip of a metal sensor tube 13, and is connected by a lead wire 15 to, for example, a control device (not shown) that controls the operation of a heat medium circulation pump. The base end of the sensor tube 13 is inserted into the shield cap 16 from an elastic member provided on the side surface of the heat receiving box 2 with a portion protruding outside the heat receiving box 2, and the distal end of the sensor tube 13 is inserted into the shield cap 16 from an elastic member provided on the side surface of the heat receiving box 2, and the distal end of the sensor tube 13 is inserted into the shield cap 16 from an elastic member provided on the side surface of the heat receiving box 2. They are inserted into arc-shaped recesses 10a formed on the upper surfaces of the two water passages 10A and 10B in proximity to the header 12, and the radius of the recesses 10a is set to be approximately the same as the radius of the outer peripheral surface of the sensor tube 13. Ru.

Note that the sensor tube 13 insertion opening of the shield cap 16 is closed with a thin film before the sensor tube 13 is inserted. Further, the shield cap 16 is formed with a cover portion 16a that covers the protruding portion of the sensor tube 13 and the lead wire 15.

The sensor fixture 9 includes a mounting portion 9a and a curved portion 9.
The mounting portion 9a is fixed to the sheet portion 11 of the heat collecting plate 5 by a fixing means such as welding. The curved portion 9b is formed in an arc shape so as to elastically press the outer circumferential surface of the sensor tube 13 from above, and the radius of the inner circumferential surface of the curved portion 9b is the same as that of the sensor tube 13.
It is set almost the same as the radius of the outer circumferential surface. Further, the curved portion 9b is formed with a convex portion 9c that protrudes inward, and the sensor tube 13 is positioned by fitting the convex portion 9c into a concave portion 13a formed on the outer peripheral surface of the sensor tube 13. There is. That is, the temperature sensor 8 is set to be located directly above one of the water passages, for example, the water passage 10B.

Next, the operation of the embodiment of the present invention will be explained.

When attaching the sensor tube 13 containing the temperature sensor 8 to the heat receiving box 2, the sensor tube 13 with the shield cap 16 inserted is first attached to the sensor fixture 9 fixed to the sheet portion 11 of the heat collecting plate 5 in advance.
into the curved part 9b. When the sensor tube 8 is pushed in from this state, the sensor tube 8 is inserted into the recess 10a of the water passage 10A, and when the sensor tube 8 is further pushed and reaches the recess 10a of the water passage 10b, the protrusion 9c of the curved part 9b is inserted into the sensor pipe 8. 13 into the recess 13a. As a result, the temperature sensor 8
It is set so that it is located directly above B. Finally, by pushing the shield cap 16 into the side opening of the heat receiving box 2, the installation work of the sensor tube 13 is completed.

In this way, the sensor tube 13 is pushed in while being guided by the curved portion 9b of the sensor fixture 9, and the elastic action of the curved portion 9b causes the sensor tube 13 to
It is pressed into close contact with the recess 10a of b. Therefore, the contact of the sensor pipe 13 with the water passages 10A and 10B becomes a surface contact, and the contact area becomes large.
The temperature of the heating medium inside is accurately conducted to the sensor tube 13,
As a result, the detection accuracy of the heat medium temperature of the temperature sensor 8 is improved.

[Effect of idea]

As described above, according to the present invention, the sensor tube housing the temperature sensor is tightly pressed against the recess of the water passage by the elastic action of the sensor fixing device, so that the detection accuracy of the heating medium temperature of the temperature sensor is greatly improved. improves. Further, since the temperature sensor can be set in a predetermined position simply by inserting the sensor tube into the sensor fixture, there is an effect that the sensor tube can be easily attached and replaced.

[Brief explanation of the drawing]

Fig. 1 is a partial schematic vertical cross-sectional view of a solar heat collector according to the present invention, Fig. 2 is a perspective view showing the relationship between the heat collecting plate and the sensor tube, and Fig. 3 is a part of the sensor tube housing the temperature sensor. FIG. 4 is a front view with parts cut away and shown in perspective, and FIG. 4 is a perspective view of the sensor fixture. 1... Solar heat collector, 2... Heat receiving box, 5... Heat collection plate, 8... Temperature sensor, 9... Sensor fixture,
9c... Convex portion, 10... Water passage, 12... Header, 13... Sensor tube, 13a... Concave portion.

Claims (1)

[Claims for Utility Model Registration] (1) In a solar heat collector comprising a header fixed to a heat receiving box and a heat collecting plate consisting of a plurality of passageways, at least one of the plurality of passageways A solar heat collector in which an arc-shaped recess is formed in a water channel, a sensor tube containing a temperature sensor is inserted into the recess, and a sensor fixture is provided to elastically fix the sensor tube. (2) The solar heat collector according to claim 1, wherein the sensor tube is provided with a concave portion, and the sensor fixture is provided with a convex portion that fits into the concave portion.