JP2002130835A - Solar collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solar collector exhibiting excellent installation performance and a high degree of freedom in piping, and a hot water supply apparatus comprising it, in which a heat collecting fin is constructed to be fixed/removed easily and a temperature sensor can be fixed directly thereto and the accuracy of temperature measurement is enhanced. SOLUTION: The solar collector comprises a plurality of header pipes 4 connected in parallel through a plurality of branch pipes 5 so tat heating medium can be fed through both the header pipes 4 and the branch pipes 5. At least one of the header pipe 4 or the branch pipe 5 is fixed with a heat collecting fin 6 (13) and a groove or a through hole for inserting a temperature sensor 9 for measuring the temperature of heating medium is juxtaposed to the heat collecting fin along the header pipe 4 or the branch pipe 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar heat collector such as a solar heat collector that raises the temperature of a heat medium using solar energy.

[0002]

2. Description of the Related Art As shown in FIG. 1, a flat solar heat collector 1 used in a solar hot water supply system absorbs solar energy in a rectangular parallelepiped case 2 made of metal, glass or the like. The heat collecting section 3 is provided in a sunny place such as on a roof of a house. In addition, FIG.
FIG. 3 schematically illustrates a state in which a part of the case 2 and a part of the heat collecting unit 3 are broken.

[0003] A heat collecting section 3 for heating the heat medium is provided with a case 2
And two header tubes 4 mainly provided with metal and through which the heat medium flows in and out, and connected to these header tubes 4 and, for example, outflow of the heated heat medium. A plurality of branch pipes 5 into which the unheated heat medium flows,
It mainly comprises a plurality of heat collecting fins 6 joined to the branch pipe 5. In the figure, reference numeral 2a denotes a light-transmitting cover such as glass, and sunlight is poured into the cover 2a.

In the heat collecting section 3, for example, there is a place 7 for attaching a temperature sensor to the heat collecting fins 6, and by detecting the temperature of the heat collecting fins 6 by the temperature sensor, the temperature of the heat medium is estimated by estimating the temperature of the heat medium. The circulation control of the medium (drive control of a pump (not shown) or the like) is performed so that the solar heat collector can be operated efficiently.

A specific example in which a temperature sensor is attached to the heat collecting fins 6 will be described. Here, in order to efficiently use the heated heat medium, it is desirable that the temperature sensor be installed at the place where the temperature of the solar heat collector rises most. As shown in FIG. 8, a sensor mounting member 10 made of a good heat conductor is fixed to a heat collecting fin 6 near the header tube 4 from which the heat medium of the solar heat collector flows out by using a screw 12, a rivet, welding, or the like. Then, the temperature sensor 9 is generally mounted on the sensor mounting member 10.

The number of solar heat collectors provided with the temperature sensor 9 may be one or more. That is, for example, there are two heat collectors with a temperature sensor, and a system configuration that can perform finer temperature management may be used. However, as described above, since the heat medium having the highest temperature is collected on the outflow side, The one incorporating the temperature sensor is placed at the end of the heat medium outlet side of the entire system. Similarly, in a system configuration in which a plurality of solar heat collectors are connected, a solar heat collector provided with a temperature sensor is disposed closest to the end on the heat medium outflow side.

[0007] However, in the case where only a solar heat collector with a temperature sensor is arranged at a target position in actual installation on a roof or the like, the solar heat collector with a temperature sensor is
If it was temporarily stored with other solar collectors without a temperature sensor, a solar collector with a temperature sensor might be erroneously installed where the one without a temperature sensor should be placed. In addition, it is necessary to consider that the solar heat collector with the temperature sensor or the solar heat collector without the temperature sensor is installed while confirming one by one. For this reason, the location of the heat medium outflow as a system is limited, and the degree of freedom of piping is reduced.

Further, as shown in FIG. 7, for example, in a system in which a plurality of heat collectors J are connected, when a temperature sensor is at the right end, a device for exchanging heat of a heat medium is on the left side and an outlet is provided. Even if you know that being on the left is more efficient,
The header port on the side where the temperature sensor is attached must be set to the outflow side, and there is a limitation on the piping of the heat medium flow path of the heat medium.

Further, for example, when the temperature sensor is of a detachable type, a structure for attaching the temperature sensor to the heat collecting fin must be newly provided, and a part of the heat collector is disassembled for fixing the temperature sensor. Unnecessary work steps, such as the inability to perform the mounting work if not performed, occur. In addition, the mounting bracket incorporating the sensor, such as the heat collecting fin 6 and the sensor mounting member 10 in FIG. Since the structure is such that heat is conducted through the contact portion with the metal fittings, the contact between the mounting metal fittings becomes insufficient, and a problem such as a failure in correct temperature measurement is likely to occur.

In view of the above, the present invention solves the above-mentioned problems, and allows the temperature sensor to directly attach the structure of the heat collecting fin.
Another object of the present invention is to provide an excellent solar heat collecting apparatus which can be easily attached and detached, can improve the accuracy of temperature measurement, has excellent workability and flexibility in piping, and can operate efficiently. .

[0011]

In order to solve the above-mentioned problems, a solar heat collecting apparatus of the present invention comprises a plurality of header pipes connected in parallel by a plurality of branch pipes, and the header pipe and the branch pipes are connected to each other. A solar heat collecting apparatus that allows a heat medium to flow through both, wherein a heat collecting fin is attached to at least one of the header pipe or the branch pipe, and a temperature of the heat medium is measured on the heat collecting fin. A groove or a through-hole for inserting a temperature sensor for performing the operation is arranged along the header pipe or the branch pipe.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a solar heat collecting apparatus according to the present invention will be described in detail with reference to the drawings schematically showing a flat type solar heat collector as an example. It is to be noted that the same members will be denoted by the same reference numerals, and redundant description will be omitted.

As already described with reference to FIG. 1, a solar heat collector 1 which is a solar heat collecting apparatus of the present invention comprises a rectangular parallelepiped case 2 in which a plurality of header tubes 4 are connected to each other by a plurality of branch tubes 5. The heating medium is circulated through both the header pipe 4 and the branch pipe 5, which are heating medium pipes, by connecting them in parallel. Then, a heat collecting fin 6 is attached to at least one of the header pipe 4 and the branch pipe 5, and a long elongate for inserting a temperature sensor described later for measuring the temperature of the heat medium into the heat collecting fin 6. Grooves or through holes are provided. For example, as shown in FIG.
Alternatively, they are juxtaposed along the branch pipe 5 (from one end to the other end of each heat medium pipe substantially parallel to the heat medium pipe). The temperature sensor arrangement portion 6d is manufactured by molding or bending. As the heat medium, for example, an antifreeze or water containing propylene glycol as a main component is used.

With such a configuration, the solar heat collector 1 is disposed, for example, on the roof of a house, and can be used as one of the components of the hot water supply device.

Here, the side and bottom surfaces of the case 2 are made of a metal material such as aluminum by extrusion molding, sheet metal, fiber-reinforced plastic, or the like, and the upper surface (light receiving surface of sunlight) is made of glass having a light transmitting property. And a cover body 2a made of plastic. Further, a through hole through which each of the above-mentioned pipes can be inserted is formed so that a plurality of solar heat collectors can be connected to each other. Further, a heat insulating material such as glass fiber is provided between the pipes in order to enhance the heat insulating effect.

Each of the pipes is made of copper, stainless steel, or the like. For example, as shown in FIG. 4, a heat medium flows in from the left end 14a of the header pipe 4 in the lower part of FIG. It is made to flow out from the right end 14c of the header tube 4. In FIG. 4, when a plurality of solar heat collectors 1 are interconnected, for example, 14a,
14d serves as a heat medium inlet, and 14b and 14c serve as heat medium outlets. 7a to 7d are provided on the heat collecting fins 6 attached to the branch pipe 5 substantially parallel to the branch pipe 5, and formed in a plurality of grooves or through holes formed from one end to the other end of the heat collecting fin 6. This is an arrangement location in the temperature sensor installation section 6d.

The arrangement of the temperature sensor is as follows.
For example, as shown in FIG. 2, a cylindrical sensor disposition portion 6 d formed on the heat collecting fin 6 is provided so as to be convex on each of the light receiving surface 6 a side and the back surface 6 b side of the heat collecting fin 6.
A temperature sensor 9 is inserted into an end of the sensor arrangement portion 6d on the header tube 4 side in the through hole 6e, and is fixed by a frictional force such as press-fitting. In the figure, reference numeral 6c denotes a projection formed for disposing the branch pipe 5 on the back surface 6b of the heat collecting fin 6. Reference numeral 5a denotes a connecting portion of the branch pipe 5 with the header pipe 4.

Here, the shape of the through hole 6e may be circular or square in cross section, but is slightly larger than the outer diameter of the temperature sensor 9 so that the temperature sensor 9 can detect the temperature with high accuracy. It is desirable that the temperature sensor 9 has the same shape as the outer shape of the temperature sensor, and that the temperature sensor 9 has such a catch that it does not easily fall off. Note that a protrusion or the like for preventing the temperature sensor 9 from falling off may be provided.

With such a configuration, it is easy to mount the temperature sensor, and conventionally, a part of the main body is disassembled or caulked using a special tool as shown in FIG. It is only necessary to insert the temperature sensor into the opening. In addition, if you select a structure that is easy to attach and detach, if you want to change the piping after attaching the temperature sensor,
The temperature sensor can be removed very easily, and the piping can be easily changed.

As described above, since the temperature sensor can be attached to any of the solar heat collectors after the installation and piping of the solar heat collector, whether the solar heat collector has a temperature sensor at the time of installation and piping can be determined. It is not necessary to work while checking whether or not the temperature sensor is installed, and the temperature sensor can be arranged in accordance with the pipe, instead of considering the pipe based on the position of the temperature sensor of the solar heat collector.

It is to be noted that a method of increasing the diameter of the through hole 6e, using a material having good heat conduction such as a heat conductive sheet around the temperature sensor 9 as a cushion, and adopting a structure for preventing detachment is also effective as a detachable mounting method. is there.

Next, the case where the temperature sensor 9 is disposed on the heat collecting fin attached to the header tube 4 will be described. FIG.
As shown in (1), a heat collecting fin 13 provided with a header tube insertion hole 13c may be attached to the light receiving side of the header tube 4. The heat collecting fin 13 is also used as a tube concealing cover, and a cylindrical sensor disposing portion 13 d is provided on one side of the heat collecting fin 13 from one end of the heat collecting fin 13 substantially parallel to the header tube 4 on the back surface 13 b side with respect to the light receiving surface 13 a. May be provided, and the temperature sensor 9 may be inserted and fixed in the through hole of the sensor arrangement portion. Here, header tube outlet 2b in case 2
By making the opening larger than the header tube 4, there is no need to provide an opening for inserting the temperature sensor 9 in the heat collecting case 2, and the temperature sensor 9 can be easily attached and detached.

The portion of the heat collecting fin 13 into which the temperature sensor 9 is inserted may be formed by an extrusion molding method, a method of expanding the heat collecting fin from the inside to the outside, or a method of forming a metal rod on the heat collecting fin. A method of joining things by welding or the like can be used. In this case, it is preferable to provide the temperature sensor at one or more locations near the outlet 2b of the header tube 4, as shown in FIG.

As shown in FIG. 7, in the case of the conventional solar heat collector, the pipe direction on the heat medium outlet side is determined by the position of the temperature sensor.
The outflow is determined by the arrangement of the pipes such as the upper right. However, as shown in FIGS. 5A and 5B, in the solar heat collector of the present invention, for example, when the outlet of the heat medium is on the left side, By mounting the sensor on the left side and on the right side on the right side, the outlet can be selected on both the left and right, and the degree of freedom of piping is greatly improved. In addition, since the distance from the heat medium outlet side to the equipment that uses the heat of the heat medium can be shortened, the problem of heat loss due to the loss of the piping can be solved.

Next, a modified example of the form of the sensor arrangement portion 6d for inserting the temperature sensor 9 provided in the heat collecting fin (the heat collecting fin provided in the branch pipe 5 or the header pipe 4) will be described. Will be described as an example. The heat collecting fins 13 provided on the header tube 4 in FIG. 3 can be applied in the same manner as in this case.

As shown in FIG. 6 (a), the sensor
d may be a cylindrical through hole 6e that is convex only on the back surface 6b of the heat collecting fin 6. According to this embodiment, as compared with the case shown in FIG. 2, the heat collection on the light receiving surface 6a side of the heat collecting fin 6 can be efficiently performed, and the manufacturing is easy. Further, the effect of uniformly transmitting the temperature of the heat collecting fins 6 to the temperature sensor 9 can be expected.

As shown in FIG. 6B, the sensor arrangement portion 6d may be formed in a semi-cylindrical groove 6f having an opening narrower than the outer shape of the temperature sensor 9.
As shown in (d), a semi-cylindrical groove 6f having an opening narrower than the outer shape of the temperature sensor 9 in the lateral direction (the main surface direction of the heat collecting fin 6) may be used. According to these embodiments, it is possible to expect an effect that the temperature sensor 9 can be prevented from being damaged due to contraction of metal materials due to thermal expansion.

Further, as shown in FIG. 6 (c), an engagement groove 6 for inserting and fixing the sensor body 8 holding the temperature sensor 9 on the back surface 6b of the heat collecting fin 6 is provided.
g, and according to this configuration, the temperature sensor 9 can be more firmly protected.

As described above, since the sensor mounting portion for inserting the temperature sensor into the heat collecting fin is provided as described above, the temperature sensor can be attached and detached, and only the solar heat collector with the temperature sensor is separately managed at the time of construction. Therefore, it is not necessary to take care not to install in an unspecified arrangement.

It should be noted that what has been described in the present embodiment is merely an example. For example, the present invention can be applied to other solar heat collectors such as a vacuum tube type, and similar effects can be expected, and can be appropriately changed and implemented without departing from the gist of the present invention.

[0031]

As described above in detail, according to the solar heat collecting apparatus of the present invention, a temperature sensor can be directly incorporated into the heat collecting fins, and the temperature can be measured with high accuracy by being easily attached and detached. In addition, when many heat collectors are connected, it can be installed without specifying the presence or absence of temperature sensors in all the heat collectors, and the temperature sensors can be reliably installed at the optimum position. .

Further, since the temperature sensor can be installed in the direction of the header pipe outlet, the degree of freedom in piping management is greatly improved, and heat loss due to pipe routing loss and construction cost reduction. An excellent solar heat collecting apparatus capable of suppressing the rise can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically illustrating a solar heat collector.

FIG. 2 is a partial perspective view schematically illustrating a part of an embodiment of the solar heat collector according to the present invention.

FIG. 3 is a partial perspective view schematically illustrating a part of another embodiment of the solar heat collector according to the present invention.

FIG. 4 is a plan view schematically illustrating a position of a header tube outlet and an arrangement position of a temperature sensor in the solar heat collector according to the present invention.

FIGS. 5 (a) and 5 (b) are plan views schematically illustrating an arrangement position of a temperature sensor and an inflow / outflow direction of a heat medium in a solar heat collector group according to the present invention.

6 (a) to 6 (d) are cross-sectional views each schematically illustrating a state of a location of a temperature sensor in a heat collecting fin of the solar heat collector according to the present invention.

FIG. 7 is a plan view schematically illustrating an arrangement position of a temperature sensor in a conventional solar heat collector group, and an inflow / outflow direction of a heat medium.

FIG. 8 is a partial perspective view schematically illustrating a part of an embodiment of the solar heat collector according to the present invention.

[Explanation of symbols]

 1: Solar heat collector (solar heat collector) 2: Case 3: Heat collecting part 4: Header tube 5: Branch tube 6: Heat collecting fin (for branch tube) 9: Temperature sensor 13: Heat collecting fin (for header tube)

Claims (1)

[Claims] 1. A solar heat collecting apparatus in which a plurality of header tubes are connected in parallel by a plurality of branch tubes so that a heat medium flows through both the header tubes and the branch tubes. A heat collecting fin is attached to at least one of the pipe and the branch pipe, and a groove or a through hole for inserting a temperature sensor for measuring the temperature of the heat medium is formed in the heat collecting fin, and the header pipe or the branch is formed. A solar heat collecting device, which is arranged side by side along a pipe.