JP2014240738A - Heat collector of solar heat utilization system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat collector of a solar heat utilization system superior in workability in construction, improved in design by saving a space, and further capable of lowering component costs by applying a simple structure.SOLUTION: A heat collector 11 includes a heat collector case 25 accommodating a heat collection plate 21 provided with a flow channel 19 of a heat medium, an inlet/outlet pipe 33 connected to the heat collection plate 21 at its one end opening portion 35, and having a cylindrical seal face 41 disposed on an inner peripheral face of the other end opening portion 37 penetrated through a bottom surface 69 of the heat collector case 25 to be led out, a joint pipe 45 of which an insert-side end portion inserted to the inlet/outlet pipe 33 has a fitting seal portion 47 having an O-ring 43 tightly kept into contact with the cylindrical seal face 41, and a flange portion 49, and a fixing metal fitting 61 having a bottom surface-side holding piece 65 holding the flange portion 49 between a tip portion provided with an U-shaped cutout 67 and the other end opening portion 37, and a side face-side fixing piece vertically disposed on a rear end portion of the bottom surface-side holding piece 65 and fixed to a side face 59 of the heat collector case 25.

Description

  The present invention relates to a collector of a solar heat utilization system.

A solar heat utilization system such as a solar water heater includes a heat collector that collects solar heat, a hot water storage tank that can store the heat, and a heat medium piping system that circulates the heat medium therebetween. The solar heat collected by the heat collector is carried to the hot water storage tank by the heat medium passing through the heat medium piping system. A heat exchanger connected to the heat medium piping system is provided in the hot water storage tank, and hot water is stored. In the hot water tank, the heat of the heat medium is transferred to hot water by the heat exchanger and stored.
Here, as shown in FIG. 5A, the solar collector 501 of the solar heat utilization system is generally a mounting plate provided with a channel material 503 on the roof of a house and provided on the side surface 505 of the collector. 507 is fixed by being fastened to the channel member 503 with bolts 509.

  In order to connect the heat collector 501 with the heat medium pipe 511, at least two inlet / outlet pipes 513 are attached to the upstream end and the downstream end of the flow path. The inlet / outlet pipe 513 is provided, for example, on the heat collector side surface 505. The inlet / outlet pipe 513 and the heat medium pipe 511 are connected via a hose 515. The inlet / outlet pipe 513 is tapered. One end side of the joint pipe 517 wound with a seal tape is assembled to the entrance / exit pipe 513 by being tightened into a taper screw using a tool. That is, the inlet / outlet pipe 513 and the joint pipe 517 have a connection structure by a screwing method. The joint pipe 517 connected to the inlet / outlet pipe 513 is connected to the heat medium pipe 511 by a hose 515 whose other end is fixed by a hose band 519.

Japanese Patent Laid-Open No. 11-132574

However, the connection structure by the screwing method of the inlet / outlet pipe 513 is affected by leakage of leakage depending on how the sealing tape is wound and how much the joint pipe 517 is tightened when the heat collector 501 and the joint pipe 517 are connected. Is done.
In addition, because of the structure, the inlet / outlet pipe 513 is on the heat collector side surface 505, and therefore, when the heat collector 501 is provided, a space for constructing piping between the heat collectors is required. For this reason, the heat collectors 501 cannot be brought into close contact with each other, and there is a problem in design.

On the other hand, in order to consider the above design properties, a connection structure in which a joint pipe 529 is connected to an inlet / outlet pipe 527 provided on the heat collector bottom surface 521 using a quick fastener 523 as shown in FIG. (See Patent Document 1 etc.).
The connection structure by the quick fastener method does not require a tool by using the O-ring 525, and the connection of the joint pipe 529 to the inlet / outlet pipe 527 becomes easy. However, a space between the heat collector bottom surface 521 and the roof surface is required due to the assembly structure. For this reason, when the solar panel is installed, the position of the upper surface of the heat collector 501 does not match, which also causes a problem in design.
Further, visual confirmation is required at the time of attaching the quick fastener 523. For this reason, the confirmation work which looks into the heat-collector bottom face 521 is needed, and there existed a problem that the working posture lacking in stability was forced. In addition, since reliable fastening members such as bolts and nuts are not used, there is a possibility of leakage due to the quick fastener falling off after installation. Furthermore, in order to attach the quick fastener 523, it is necessary to provide the flange part 531 in both the entrance / exit pipe 527 and the joint pipe 529, and the manufacturing cost of the entrance / exit pipe 527 and the joint pipe 529 also increases.

  The present invention has been made in view of the above situation, and its purpose is to use solar heat, which has good workability during construction, improves design by space-saving, and lowers the cost of parts with a simple structure. It is to provide a collector for the system.

The above object of the present invention is achieved by the following configuration.
(1) A heat collecting plate in which a flow path of a heat medium is formed, a heat collector case in which the heat collecting plate is accommodated, and one end opening communicated with the flow passage and connected to the heat collecting plate. And the other end opening led out through the bottom surface of the collector case has a cylindrical sealing surface on the inner peripheral surface, and the insertion side end inserted into the other end opening of the outlet tube A fitting tube having a fitting seal portion having an O-ring closely contacting the cylindrical seal surface and a flange portion protruding from the outer peripheral surface, a tip portion having a U-shaped notch, and the inlet / outlet tube A bottom-side clamping piece that clamps the flange portion between the other-end opening, and a side-side fixing piece that is suspended from the rear end of the bottom-side clamping piece and is fixed to the side surface of the collector case. A solar collector using a solar heat utilization system, comprising:

According to the solar collector of the solar heat utilization system having the above configuration (1), when connecting the joint pipe to the inlet / outlet pipe that is communicated with the flow path of the heat collector plate and led out from the bottom surface of the collector case. The insertion side end of the joint pipe is inserted into the other end opening of the inlet / outlet pipe. The insertion-side end inserted into the entrance / exit pipe until the flange portion abuts the other end opening is sealed with a cylindrical seal surface of the entrance / exit pipe by a fitting seal portion having an O-ring.
And the bottom face side clamping piece of a fixture is inserted in parallel along the bottom face of a heat collector case so that the joint pipe connected to the entrance / exit pipe may be inserted into the U-shaped notch at the tip. When the joint pipe is inserted into the U-shaped notch of the bottom-side clamping piece and the side-side fixing piece of the fixture is fixed to the side surface of the heat collector case, the tip of the bottom-side clamping piece is connected to the inlet / outlet pipe A flange portion is sandwiched between the other end opening. Therefore, the joint pipe in which the flange portion is sandwiched between the bottom end side sandwiching piece of the fixing bracket and the other end opening portion cannot be detached from the inlet / outlet pipe, and the connection is completed. The insertion side end of the joint pipe can be rotated in any direction by an O-ring seal. As a result, for example, in the case of an L-shaped (elbow) tubular joint pipe, the other end can be easily changed to an arbitrary lead-out direction of 360 ° according to the wiring direction of the connection hose.
Therefore, in the above connection structure, the occurrence of leakage is not affected by the construction skill, unlike the conventional screw-in connection structure.
Moreover, since there is no inlet / outlet pipe on the side surface of the heat collector case, a plurality of heat collectors can be closely attached.
In addition, when inserting the bottom-side clamping piece of the fixture in parallel along the bottom surface of the heat collector case so that the joint pipe is inserted into the U-shaped notch at the tip, the U-shaped notch can also be searched by hand. It is possible to confirm the fitting condition between the pipe and the joint pipe, and the flange portion can be securely clamped between the tip end portion and the other end opening portion of the bottom-side clamping piece.
Further, since the bottom-side clamping piece of the fixing bracket is thinner than the quick fastener, the height of the joint pipe relative to the bottom surface of the heat collector case can be reduced. This makes it possible to reduce the distance between the heat collector and the roof surface and align the solar panel with the top surface position.

(2) A solar collector using the solar heat utilization system configured as described in (1) above, wherein the U-shaped notch is a multi-stage U-shaped notch whose opening width gradually decreases from an opening end. Collector of solar heat utilization system.

  According to the solar collector of the solar heat utilization system having the configuration of (2) above, the U-shaped notch formed on the bottom-side sandwiching piece of the fixing bracket becomes a multi-stage U-shaped notch, so that one type of fixing bracket is used. It is possible to cope with a plurality of sizes of joint pipes having different outer diameters. Thereby, the freedom degree of the fixing metal fitting with respect to a joint pipe size increases.

(3) A solar collector of the solar heat utilization system configured as described in (1) or (2) above, wherein a bolt head is engaged with a side surface of the collector case to A rail groove that slidably holds the bolt in the extending direction of the side surface is formed, and the side-side fixing piece has a bolt insertion hole through which the bolt is inserted,
A solar collector using a solar heat utilization system, wherein the side fixing piece is fastened and fixed to the side of the collector case by screwing a nut onto the bolt.

According to the solar collector of the solar heat utilization system having the configuration (3), the bolt whose head is engaged with the rail groove provided on the side surface of the collector case protrudes vertically from the side surface of the collector case. It becomes possible to move along the rail groove with the posture. That is, the fixing bracket supported by the bolt inserted through the side-side fixing piece can be easily aligned with the position of the inlet / outlet pipe by sliding along the side surface of the heat collector case.
Therefore, when the position of the bolt is determined, the clamping piece on the bottom side of the fixing bracket is inserted so that the joint pipe is inserted into the U-shaped notch at the tip while inserting the bolt insertion hole of the side fixing piece into the tip of the bolt. In this state, the nut is screwed onto the bolt tip in this state, so that the fixing piece on the side of the fixing bracket is inserted into the side of the collector case via the bolt and rail groove. Fixed to. The fixing bracket with the side-side fixing piece fixed to the side of the collector case is clamped by the bottom-side clamping piece with the flange of the joint pipe between the other end opening of the inlet / outlet pipe, and the joint pipe is connected to the inlet / outlet pipe. It is fixed so that it cannot be detached.

  According to the solar collector of the solar heat utilization system according to the present invention, the workability at the time of construction is good, the design property is improved by space saving, and the cost of components can be reduced by a simple structure.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is principal part sectional drawing of the heat collector which concerns on one Embodiment of this invention. FIG. 2 is an overall perspective view of a solar heat utilization system in which the heat collector of FIG. 1 is used. It is a principal part perspective view of the heat collector before a fixing metal fitting is fixed. It is a perspective view of the fixture which concerns on a modification. (A) is the connection structure perspective view by the conventional screwing system, (b) is a side view of the connection structure by the conventional quick fastener system.

Embodiments according to the present invention will be described below with reference to the drawings.
The heat collector 11 which concerns on one Embodiment of this invention shown in FIG. 1 is used for the solar-heat utilization system 13 shown in FIG. In the solar heat utilization system 13, a hot water tank 15 is disposed above the two collectors 11 provided side by side, and the heat medium is forcibly circulated between the heat collector 11 and the hot water tank 15 by a heat medium circulation system (not shown). Then, it exchanges heat with the water in the hot water tank. Moreover, the solar-heat utilization system 13 isolate | separates the heat collector 11 and the hot water storage tank 15, and the heat collector 11 may be installed in another space on a roof.

  The heat collector 11 of the present embodiment is configured such that one or both of the two plates 17 formed in a quadrangular shape are formed in a corrugated shape, and the two plates 17 are bonded to each other so that the heat medium passes therethrough. It is a plate type heat collector having a heat collecting plate 21 in which a path 19 is formed. The peripheral edge 23 of the heat collecting plate 21 is fixed to the internal fixing piece 27 of the heat collector case 25 with screws 29 and is accommodated in the heat collector case 25. A metal material having good thermal conductivity is used for the plate 17 constituting the heat collecting plate 21. A transparent plate 31 is attached to the upper surface side of the heat collector case 25 that houses the heat collecting plate 21.

  In the heat collecting plate 21, inlet / outlet pipes 33 (connecting pipes) are attached to at least two places communicating with the heat medium circulation pipe at the upstream end and the downstream end of the flow path 19. In the present embodiment, the inlet / outlet pipes 33 are attached to the four corners of the heat collecting plate 21 in consideration of the versatility of the heat collector 11. The entrance / exit pipe 33 has one end opening 35 connected to the lower plate 17 of the heat collecting plate 21 formed by joining the two plates 17 together. The other end opening 37 of the inlet / outlet pipe 33 passes through the bottom plate 39 of the heat collector case 25 and is led out to the bottom surface side. The inlet / outlet pipe 33 and the heat collecting plate 21 can be easily connected with a simple structure in which the circular one end opening 35 of the inlet / outlet pipe 33 is inserted into the circular brazing opening 18 opened in the lower plate 17. This is done by welding or brazing.

  The inlet / outlet pipe 33 that communicates with the flow path 19 and is connected to the heat collecting plate 21 has a cylindrical sealing surface 41 formed on the inner peripheral surface 38 of the other end opening 37 that is led out through the heat collector case 25. Is done. A chamfered portion that guides reception of the O-ring 43 is formed at the other end opening 37 of the inlet / outlet pipe 33.

  A joint pipe 45 is connected to the other end opening 37 of the inlet / outlet pipe 33. The joint pipe 45 is provided with a fitting seal portion 47 having an O-ring 43 that is in close contact with the cylindrical seal surface 41 and a flange portion 49 protruding from the outer peripheral surface at the insertion side end portion. In the present embodiment, the joint pipe 45 is formed in an L-shaped (elbow) tubular shape, but the joint pipe 45 may be a straight tubular form. The joint pipe 45 formed in an L-shape has a fitting seal portion 47 and a flange portion 49 formed at the insertion side end portion, and connects the connection hose 53 to the outer periphery at the other end on the opposite side across the elbow portion 51. A joint (so-called bamboo shoot) 55 is formed.

The fitting seal portion 47 of the joint pipe 45 is formed with a circumferential groove 57 in which the O-ring 43 is mounted. The circumferential groove 57 of the joint pipe 45 is formed at the insertion side end of the joint pipe 45. The O-ring 43 attached to the circumferential groove 57 is set so that the inner diameter is smaller than the outer diameter of the circumferential groove bottom surface. Accordingly, the inner periphery of the O-ring 43 attached to the circumferential groove 57 is in close contact with the bottom surface of the circumferential groove. In this state, the outer diameter of the O-ring 43 is set to be larger than the outer diameter of the fitting seal portion 47.
On the other hand, the inner diameter of the cylindrical seal surface 41 of the inlet / outlet pipe 33 is set to be larger than the outer diameter of the fitting seal portion 47 and smaller than the outer diameter of the attached O-ring 43. Accordingly, the fitting seal portion 47 to which the O-ring 43 is attached is inserted into the other end opening 37 of the inlet / outlet pipe 33, whereby the O-ring 43 is compressed by a predetermined compression amount. The compressed O-ring 43 tightly contacts the bottom surface of the circumferential groove and the cylindrical seal surface 41 by an elastic restoring force, thereby watertightly sealing the gap between the inlet / outlet pipe 33 and the joint pipe 45.

Since the heat collecting plate 21 has a positive pressure in the flow path, the O-ring 43 crushed in the circumferential groove is moved to the outside in the circumferential groove. At that time, the O-ring 43 is pressed against the gap between the cylindrical seal surface 41 and the fitting seal portion 47 to close the gap, thereby sealing the gap between the inlet / outlet pipe 33 and the joint pipe 45 in a watertight manner.
The flange portion 49 has an outer diameter larger than the inner diameter of the entrance / exit pipe 33 and is formed so as to be able to contact the other end opening portion 37.

A fixing bracket 61 shown in FIG. 3 is fixed to the side surface 59 of the heat collector case 25. The fixing bracket 61 formed in an L-shape includes a bottom-side clamping piece 65 that clamps the flange portion 49 between the distal end where the U-shaped notch 67 is formed and the other end opening 37 of the inlet / outlet pipe 33, A side-side fixing piece 63 that is suspended from the rear end portion of the bottom-side clamping piece 65 and fastened and fixed to the side surface 59 of the heat collector case 25 is provided. The U-shaped notch 67 formed at the tip of the bottom-side clamping piece 65 has an opening width that is larger than the outer diameter of the insertion side end of the joint pipe 45 and smaller than the outer diameter of the flange portion 49.
As a result, the fixing fitting 61 clamps the flange portion 49 between the tip end portion of the bottom surface side holding piece 65 and the other end opening portion 37 of the inlet / outlet pipe 33.
As shown in FIG. 4, it is also possible to use a fixing bracket 61 </ b> A having a multi-stage U-shaped notch 71 whose opening widths A, B, and C are gradually reduced from the opening end (A>B> C).

  As shown in FIG. 3, the head portion 75 of the bolt 73 is engaged with the side surface 59 of the heat collector case 25 to hold the bolt 73 slidably in the extending direction of the side surface 59 of the heat collector case 25. Rail grooves 77 are formed. A bolt insertion hole 79 through which the bolt 73 is inserted is formed in the side surface side fixing piece 63 of the fixing bracket 61. Therefore, the side-side fixing piece 63 is fastened and fixed to the side surface 59 of the heat collector case 25 by screwing the nut 81 into the bolt 73 inserted through the bolt insertion hole 79.

Next, the connection hose connection procedure of the heat collector 11 will be described.
In order to connect the L-shaped joint pipe 45 to the heat collector 11, first, the insertion side end portion of the joint pipe 45 provided with the fitting seal portion 47 is contacted with the flange portion 49 against the other end opening portion 37. Insert into the inlet / outlet pipe 33 until it stops in contact. Thereby, the O-ring 43 of the fitting seal portion 47 is in close contact with the cylindrical seal surface 41 of the inlet / outlet pipe 33.

Next, in order to fix the fixing bracket 61 to the side surface 59 of the heat collector case 25, the head 75 of the bolt 73 is inserted from the end opening 77 a of the rail groove 77, and the bolt 73 is slidably engaged with the rail groove 77. Match. The bolt 73 having the head 75 engaged with the rail groove 77 can move along the rail groove 77 in a posture protruding vertically from the side surface 59 of the heat collector case 25.
Therefore, the bolt 73 having the head 75 engaged with the rail groove 77 is positioned at the position of the inlet / outlet pipe 33. When the position of the bolt 73 is determined, the fixing fitting 61 is inserted so that the joint pipe 45 is inserted into the U-shaped notch 67 at the tip while the bolt insertion hole 79 of the side fixing piece 63 is inserted into the tip of the bolt. The bottom side clamping pieces 65 are inserted in parallel along the bottom surface 69 of the heat collector case 25. In this state, the nut 81 is screwed onto the bolt tip and the nut 81 is tightened, so that the side surface side fixing piece 63 of the fixing bracket 61 is fixed to the side surface 59 of the collector case 25 via the bolt 73 and the rail groove 77. Is done.
As shown in FIG. 1, the fixing bracket 61 in which the side surface side fixing piece 63 is fixed to the side surface 59 of the collector case 25 is connected to the flange portion 49 of the joint pipe 45 by the bottom surface side holding piece 65 as well as the inlet / outlet pipe 33. The joint pipe 45 is fixed to the inlet / outlet pipe 33 so as not to be detached by being sandwiched between the end opening 37 and the bottom plate 39. In the present embodiment shown in FIG. 1, the flange portion 49 is sandwiched via the reinforcing plate 83 fixed to the bottom plate 39 of the heat collector case 25.

  In the case of the joint structure central part that connects the heat collectors 11, the other ends of both joint pipes 45 are rotated to positions facing each other. Next, the connection hose 53 is connected to the other ends of both the joint pipes 45, the connection hose 53 is fixed to each joint 55 with the one-touch band 85, and the collectors 11 are connected to each other via the connection hose 53. To complete.

Next, the operation of the heat collector 11 according to the above embodiment will be described.
As described above, in the heat collector 11 of the solar heat utilization system 13 according to the present embodiment, the inlet / outlet pipe 33 communicated with the flow path 19 of the heat collector plate 21 and led out from the bottom surface 69 of the heat collector case 25, When connecting the joint pipe 45, the insertion side end of the joint pipe 45 is inserted into the other end opening 37 of the inlet / outlet pipe 33. The insertion side end inserted into the inlet / outlet pipe 33 until the flange portion 49 abuts the other end opening 37 is between the cylindrical seal surface 41 of the inlet / outlet pipe 33 and a fitting seal part having an O-ring 43. 47 is watertight sealed.

  Then, the bottom-side sandwiching piece 65 of the fixing bracket 61 extends along the bottom surface 69 of the collector case 25 so that the joint tube 45 connected to the inlet / outlet tube 33 is inserted into the U-shaped notch 67 at the tip. Inserted in parallel. When the side surface side fixing piece 63 of the fixing bracket 61 is fixed to the side surface 59 of the heat collector case 25 in a state where the joint pipe 45 is inserted into the U-shaped notch 67 of the bottom surface side holding piece 65, the bottom surface side holding piece 65 The flange portion 49 is sandwiched between the distal end portion of 65 and the other end opening portion 37 of the entrance / exit pipe 33.

Therefore, the joint pipe 45 in which the flange portion 49 is sandwiched between the bottom end side sandwiching piece 65 of the fixing bracket 61 and the other end opening portion 37 cannot be detached from the inlet / outlet pipe 33, and the O-ring 43 is cylindrical. It is positioned at a predetermined position of the seal surface 41 and the watertight seal state is maintained.
At this time, the insertion side end of the joint pipe 45 can be rotated in an arbitrary direction by the seal of the O-ring 43. Thereby, in the case of the L-shaped joint pipe 45, the other end can be easily changed to an arbitrary lead-out direction of 360 ° according to the wiring direction of the connection hose 53.

Further, in the connection structure of the heat collector 11 according to the present embodiment, the insertion tip portion of the joint pipe 45 into which the O-ring 43 is fitted is inserted into the inlet / outlet pipe 33 led to the bottom surface 69 of the heat collector case 25. To prevent leakage. For this reason, the occurrence of leakage is not affected by the construction skill unlike the connection structure by the conventional screwing method.
In addition, since there is no inlet / outlet pipe on the side surface 59 of the heat collector case 25, a plurality of heat collectors 11 can be closely attached.

Further, when the bottom-side clamping piece 65 of the fixing bracket 61 is inserted in parallel along the bottom surface 69 of the heat collector case 25 so that the joint pipe 45 is inserted into the U-shaped notch 67 at the tip, The state of fitting between the U-shaped notch 67 and the joint pipe 45 can be confirmed by groping, and the flange portion 49 can be securely clamped between the front end portion of the bottom-side clamping piece 65 and the other end opening 37. .
Further, since the bottom-side clamping piece 65 of the fixing bracket 61 is thinner than the quick fastener 523 (see FIG. 5B), the height of the joint pipe 45 relative to the bottom surface 69 of the heat collector case 25 is lower. Can be suppressed. Thereby, the distance of the heat collector 11 and a roof surface can be made low, and it becomes possible to align a solar panel and an upper surface position.

Furthermore, by fixing the fixing fitting 61 to the heat collector 11 with the bolt 73 and the nut 81, the flange portion 49 of the joint pipe 45 is reliably caught on the bottom side holding piece 65 and is not pulled out. As a result, like the quick fastener system, the joint pipe 45 can be prevented from falling off without providing the flange portion 531 (see FIG. 5B) in both the inlet / outlet pipe 527 and the joint pipe 529, and the manufacturing cost can be reduced. Can do.
Further, by forming the multi-stage U-shaped notch 71 in the bottom-side clamping piece 65 as in the fixing fitting 61A shown in FIG. 4, a single type of fixing fitting 61A has a plurality of sizes of joint pipes 45 having different outer diameters. Can be supported. Thereby, the freedom degree of 61 A of fixing brackets with respect to a joint pipe size increases.

  Further, according to the heat collector 11 of the present embodiment, the bolt 73 having the head 75 engaged with the rail groove 77 provided on the side surface 59 of the heat collector case 25 is removed from the side surface 59 of the heat collector case 25. It is possible to move along the rail groove 77 in a vertically projecting posture. Therefore, the fixing bracket 61 supported by the bolt 73 inserted into the bolt insertion hole 79 of the side surface side fixing piece 63 is aligned with the position of the inlet / outlet pipe 33 by sliding along the side surface 59 of the heat collector case 25. Becomes easy.

Therefore, according to the heat collector 11 of the solar heat utilization system 13 according to the present embodiment, workability at the time of construction is good, the design property is improved due to space saving, and the component cost is also reduced by a simple structure. it can.
In addition, the heat collector of the solar heat utilization system of this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 ... Heat collector 19 ... Flow path 21 ... Heat collecting plate 25 ... Heat collector case 33 ... Entrance / exit pipe 35 ... One end opening 37 ... Other end opening 41 ... Cylindrical sealing surface 43 ... O-ring 45 ... Joint pipe 47 ... Fitting seal part 49 ... Flange part 59 ... Side 61 ... Fixing bracket 63 ... Side side fixing piece 65 ... Bottom side clamping piece 67 ... U-shaped notch 69 ... Bottom 71 ... Multi-stage U-shaped notch 73 ... Bolt 75 ... Head Part 77 ... Rail groove 79 ... Bolt insertion hole 81 ... Nut

Claims (3)

A heat collecting plate in which a flow path of the heat medium is formed;
A heat collector case in which the heat collecting plate is accommodated;
One end opening communicates with the flow path and is connected to the heat collecting plate, and the other end opening led out through the bottom surface of the heat collector case has a cylindrical sealing surface on the inner peripheral surface Tube,
A joint pipe having a fitting seal part having an O-ring in which an insertion-side end part inserted into the other end opening of the inlet / outlet pipe is in close contact with the cylindrical seal surface and a flange part projecting from the outer peripheral surface; ,
A bottom-side sandwiching piece for sandwiching the flange portion between a front end portion where a U-shaped notch is formed and the other end opening of the entrance / exit pipe, and a rear end portion of the bottom-side sandwiching piece are provided vertically. A fixing bracket having a side-side fixing piece fixed to the side surface of the collector case;
A solar collector using a solar heat utilization system.   The solar collector according to claim 1, wherein the U-shaped notch is a multi-stage U-shaped notch whose opening width gradually decreases from the opening end. A rail groove is formed on the side surface of the heat collector case to engage the head of the bolt and hold the bolt slidably in the extending direction of the side surface of the heat collector case.
The side-side fixing piece has a bolt insertion hole through which the bolt is inserted,
The solar collector according to claim 1 or 2, wherein the side fixing piece is fastened and fixed to a side surface of the collector case by screwing a nut onto the bolt.

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