JP3130475B2 - Heat exchanger and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger including a supply-side main pipe, a return-side main pipe, and a plurality of heat exchange pipes communicating with these main pipes, and a method of manufacturing the same.

[0002]

2. Description of the Related Art As a heat exchanger and a method for manufacturing the same, for example, there is one disclosed in Japanese Patent Publication No. 52-014463. In this heat exchanger, as shown in FIG. 9 , the spacer 101 is composed of two rod-shaped elements 102. These elements 102 have semi-circular grooves 103 formed therein. When these elements 102 are combined, the grooves 103 are combined to form holes, and a plurality of tubes (not shown) are respectively accommodated in these holes.

[0003] In this method of manufacturing a heat exchanger, FIG.
0 , the tube 104 and the tube head 10
5 is connected with a sleeve 107 made of rubber or the like to prevent leakage in the hole 106 formed in the tube head 105. And this sleeve 10
The tube 104 is inserted into the tube 7, and the tube 104 and the tube head 105 are connected.

[0004]

However, in the above-described conventional heat exchanger, the tubes 104 are aligned by the spacers 101 arranged at appropriate intervals. There was a problem in strength and the like. Also, in the conventional method of manufacturing a heat exchanger,
Since the tube 104 is inserted into and fixed to the hole 106 formed in the tube head 105 via the sleeve 107, the number of parts increases and the cost increases. Moreover, at this time, a metal bush (not shown) must be inserted into the open end of the tube 104 so as not to block the tube 104, which further increases the cost.

An object of the present invention is to provide a heat exchanger capable of arranging a plurality of heat exchange pipes so as to be convenient for heat exchange and improving shape retention and strength. It is still another object of the present invention to provide a method of manufacturing a heat exchanger that can communicate with a main pipe so as not to block a heat exchange pipe, reduce costs, and prevent leakage.

[0006]

According to the present invention, there is provided a supply-side main pipe, a return-side main pipe, and a plurality of heat exchange pipes communicating with these main pipes, and a fluid distributed from the supply-side main pipe is provided. It is assumed that the heat exchanger is configured to pass through the heat exchange pipe almost simultaneously and flow to the return main pipe. The first invention includes a sheet having a length substantially equal to the length of the heat exchange pipe, and arranging the recesses in the width direction of the sheet in accordance with an interval between the heat exchange pipes, and forming the recesses into sheets. Are formed along the length direction. The present invention is characterized in that the plurality of heat exchange pipes are fitted into the plurality of recesses and aligned.

The second invention is characterized in that, in the first invention, the surface of the sheet is covered with a film in a state where the heat exchange pipe is fitted in the recess. The third invention is characterized in that, in the first invention, claws are provided in the concave portions, and the heat exchange pipe fitted in the concave portions is stopped by these claws to prevent the heat radiation pipe from coming off the concave portions. A fourth invention relates to a method of manufacturing a heat exchanger that is a premise, and includes a supply main pipe and a return main pipe each having an outer peripheral surface with:
A step of forming a plurality of holes arranged in the axial direction, and a step of inserting a jig composed of a pin portion projecting from each hole and a support portion supporting these pin portions into these main pipes,
A step of arranging a plurality of heat exchange pipes in alignment with the holes and expanding the open ends thereof in a trumpet shape, inserting the pins into the open ends of each heat exchange pipe, and welding these open ends to the main pipe. And a step of causing it to be performed.

A fifth aspect of the present invention relates to a method of manufacturing a heat exchanger which is a premise, comprising a supply-side main pipe, a return-side main pipe, and a plurality of heat exchange pipes communicating with the main pipes. A method for manufacturing a heat exchanger in which fluid distributed from a pipe passes through a heat exchange pipe at substantially the same time and flows to a return side main pipe, wherein the supply side main pipe and the return side main pipe each have an outer peripheral surface. Forming a plurality of holes arranged in the axial direction, inserting a jig including a pin portion projecting from each hole and a support portion supporting these pin portions into the main pipe, A step of arranging the exchange pipes in accordance with the holes and inserting a tubular member into the open ends thereof, inserting the pin portions into these tubular members, and connecting the tubular members to the open ends of the heat exchange pipes. Characterized in that it has a step of welding to the pipe.

In a sixth aspect, in the fourth and fifth aspects,
It is characterized in that the jig can be divided into a pin portion and a support portion, and after welding, the jig is divided and removed from the main pipe.

[0010]

1 to 4 show an embodiment of a heat exchanger according to the present invention. As shown in FIGS. 1 and 2, this heat exchanger includes a supply-side main pipe 3, a return-side main pipe 4, and an n communicating with the main pipes 3 and 4 in a heat exchange range 1 such as a floor heating panel. And five heat exchange pipes 5 (where n ≧ 2). The supply-side main pipe 3 is provided with a joint member 6 at one end thereof, and is connected to the pump P via the joint member 6 and the auxiliary pipe 7. Also,
The other end of the supply side main pipe 3 opposite to the joint member 6 is closed so as not to leak.

On the other hand, a joint member 8 is provided at the other end of the return side main pipe 4, and is connected to the tank T via the joint member 8 and the auxiliary pipe 9. Also,
One end of the return side main pipe 4 opposite to the joint member 8 is closed so as not to leak. In this way, if the side connected to the pump P and the side connected to the tank T are reversed in the pair of main pipes 3 and 4, the pipe resistance can be made uniform as much, and n Heat exchange pipe 5
When a fluid is caused to flow through the fluid, the velocity of the fluid can be kept constant. In addition, the joint members 6, 8 are provided near the center of the main pipes 3, 4, and the main pipes 3, 4
Both ends may be closed.

The n heat exchange pipes 5 communicating with the main pipes 3 and 4 are arranged at a predetermined pitch h. The heat exchange pipes 5 formed of resin or the like have the same diameter, and the radius r is smaller than the radius R of the main pipes 3 and 4. When the length of each heat exchange pipe 5 is L, the total area S ₁ of the outer peripheral surfaces of these heat exchange pipes 5 is S ₁ = 2πr × L × n.

On the other hand, the total area S ₂ of the intervals between the adjacent heat exchange pipes 5 at a predetermined pitch h is S ₂ = (n−1) × h × L. In this embodiment, the relationship of the portion S _{1 where} heat exchange is performed> the portion S ₂ where heat exchange is not performed is maintained. Since such a relationship is maintained, the substantial heat exchange area is increased, and the thermal efficiency can be improved accordingly.

Now, when the pump P is driven, the warm fluid supplied to the supply side main pipe 3 is distributed to the n heat exchange pipes 5. Then, the warm fluid passes through the heat exchange pipe 5 almost simultaneously to release heat, and returns to the return side main pipe 4. In such a heat exchanger, since the warm fluid passes through the n heat exchange pipes 5 and radiates heat almost simultaneously, there is almost no temperature difference between the upstream side and the downstream side. Therefore, in the case where the radiator panel is used for a floor heating panel as in this embodiment, even if a heat radiating plate is not provided, temperature unevenness does not occur and cost can be reduced.

In particular, in this embodiment, since the n heat exchange pipes 5 are arranged at a predetermined pitch h, the entire temperature distribution can be further uniformed. Moreover, since the heat exchange pipes 5 are provided in parallel, even if a problem occurs in any one of the heat exchange pipes 5, only the heat exchange pipe 5 needs to be dealt with. For example, when leakage occurs in any of the heat exchange pipes 5, only the heat exchange pipe 5 may be cut, and the cut opening may be melted and closed. As described above, since it is possible to deal with each individual heat exchange pipe 5, maintenance is simplified.

As shown in FIG. 3, the heat exchange pipes 5 of this heat exchanger are linearly aligned by a sheet 10 having irregularities. The sheet 10 has a length substantially equal to the length L of the heat exchange pipe 5. The sheet 10 has irregularities along its length. In the sheet 10, the concave portion 11 has a width substantially equal to the diameter 2r of the heat exchange pipe 5, and the space between the concave portions 11, that is, the convex portion 12 has the same width as the pitch h between the heat exchange pipes 5. It is arranged. Then, the heat exchange pipes 5 are fitted into these recesses 11, respectively, so that the heat exchange pipes 5 are aligned.

Further, after the heat exchange pipe 5 is fitted into the recess 11, a film 13 is attached to the surface of the sheet 10 to fix the heat exchange pipe 5. In addition, sheet 1
As 0, although not shown in the figure, a sheet having an uneven portion only on the surface of the sheet may be used in addition to the sheet having unevenness as shown in FIG. The film 13 may be made of resin or metal foil such as aluminum. Then, for example, if a metal foil is used, it functions as a heat radiating material, and the heat radiating property can be further improved.

According to the heat exchanger of this embodiment described above, since the heat exchange pipes 5 are aligned by the sheet 10 having the unevenness, the heat exchange pipes 5 can be aligned so as to be convenient for heat exchange. Moreover, the laying work can be simplified. Further, since the entire heat exchange pipe 5 can be supported by the sheet 10, the shape retention and strength of the heat exchange pipe 5 can be enhanced. Further, since the film 13 is attached to the sheet 10, the shape-retaining property and the strength of the heat exchange pipe 5 can be further enhanced.

As shown in FIG. 4, if the claws 18 are integrally formed at appropriate intervals near the opening of the concave portion 11, when the heat exchange pipe 5 is fitted into the concave portion 11, these claws 18 are formed. With this, the heat exchange pipe 5 can be stopped. Therefore, it is possible to prevent the heat exchange pipe 5 from coming off the concave portion 11, and it is possible to further enhance the shape retention and strength of the heat exchange pipe 5. In addition, in this case, another member such as the film 13 is not required, so that it does not take much time. In this embodiment, the heat exchanger is used for the floor heating device. However, the present invention is not limited to this, and a cold fluid may be flowed instead of a warm fluid.

Next, the method of manufacturing the heat exchanger described in the above embodiment, in particular, the heat exchange pipe 5 is connected to the main pipes 3, 4
A method for connecting to the server will be described. In the manufacturing method shown in FIG. 5 , n holes 14 are formed on the outer peripheral surfaces of the main pipes 3 and 4 at a predetermined pitch h in the axial direction. A jig 15 is inserted into the main pipes 3 and 4. The jig 15 is provided with a pin 15 protruding from each of the holes 14.
a and a support portion 15b for supporting these pin portions 15a (see FIG. 6 ). The length of the pin portion 15a is shorter than the diameter 2R of the main pipes 3, 4 so that the jig 15 can be divided and removed from the main pipes 3, 4.

On the other hand, n heat exchange pipes 5 formed of resin are arranged at a predetermined pitch h in accordance with the holes 14 by means of rollers (not shown). Further, the open ends of these heat exchange pipes 5 are previously expanded in a trumpet shape. Heat exchange pipe 5 using rollers (not shown)
And the pin portions 15a are respectively inserted into the open ends of the heat exchange pipes 5 whose diameters are expanded in a trumpet shape. These open ends are welded to the main pipes 3 and 4, and the heat exchange pipe 5 is connected to the main pipes 3 and 4. When the heat exchange pipe 5 is connected to the main pipes 3 and 4 in this way, the jig 15 is divided and removed from the main pipes 3 and 4.

According to this manufacturing method, since the heat exchange pipe 5 is welded to the main pipes 3 and 4, it can be easily connected, and no leakage occurs even without a sleeve or the like, and the cost can be reduced. It becomes possible. Further, when welding, the pin portion 15a is inserted into the open end of the heat exchange pipe 5, so that the hole 14 and the heat exchange pipe 5 can be prevented from being closed. Moreover, since the jig 15 can be divided, the jig 15 can be easily removed from the main pipes 3 and 4 after the heat exchange pipe 5 is welded to the main pipes 3 and 4.

As shown in FIG. 7 , the support portion 15 of the jig 15 may be formed with a taper 17.
When the taper 17 is pressed against the inner peripheral surfaces of the main pipes 3 and 4 near the hole 14 during welding,
A taper that is continuous with the hole 14 is formed on the inner peripheral surfaces of the main pipes 3 and 4. By forming a taper continuous with the hole 14 on the inner peripheral surface of the main pipes 3 and 4 in this manner, fluid flows from the main pipes 3 and 4 to the heat exchange pipe 5.
When flowing in the opposite direction or vice versa, it is possible to prevent the generation of a vortex, and to make the flow smooth.
Also, the jig 15 can be divided freely, but the length of the longest part of the jig is made shorter than the diameter 2R of the main pipes 3 and 4 so that the jig can be separated from the main pipes 3 and 4 without dividing. It may be removable.

In another manufacturing method shown in FIG . 8 , n holes 14 are formed on the outer peripheral surfaces of the main pipes 3 and 4 at a predetermined pitch h in the axial direction. A jig 15 is inserted into the main pipes 3 and 4. Then, a pin portion 15a for projecting the jig 15 from each of the holes 14 is provided.
And the support portion 15b for supporting the pin portion 15a is the same as in the above-described manufacturing method. On the other hand, n heat exchange pipes 5 formed of resin are arranged at a predetermined pitch h according to the holes 14. At this time, cylindrical members 16 made of resin are inserted into the open ends of the heat exchange pipes 5 respectively.

Then, the pin portions 15a are inserted into the cylindrical members 16 respectively, and these cylindrical members 16 are welded to the open ends of the heat exchange pipes 5 and the main pipes 3 and 4, respectively. A heat exchange pipe 5 can be connected. When the heat exchange pipe 5 is connected to the main pipes 3 and 4 in this way, the jig 15 is divided into
Remove it from 4. According to this manufacturing method, the number of parts is increased by the amount of the cylindrical member 16 as compared with the above-described manufacturing method. However, it is not necessary to increase the diameter of the open end of the heat exchange pipe 5 in a trumpet shape. Cost reduction becomes possible. In these manufacturing methods, the welding may be welding by heating, for example, induction heating or ultrasonic heating, or welding using a chemical.

[0026]

According to the first aspect of the present invention, since the heat exchange pipes are aligned by the concave portions formed in the sheet, the heat exchange pipes can be aligned in a manner convenient for heat exchange.
Moreover, the laying work can be simplified. Also, since the entire heat exchange pipe can be supported by the sheet, its shape retention and strength can be improved. According to the second aspect, in the first aspect, the film is attached to the sheet, so that the shape of the heat exchange pipe can be maintained.
Strength can be further increased. According to the third invention, in the first invention, the heat exchange pipe can be prevented from coming off the concave portion, and the shape retention and strength can be further improved. In addition, since no separate member such as a film is required, it does not take much time.

According to the fourth and fifth aspects of the present invention, since the heat exchange pipe is welded to the main pipe, no leakage occurs even without a sleeve or the like, and the cost can be reduced. Moreover, since the pin portion of the jig is inserted into the open end of the heat exchange pipe, the holes formed in the heat exchange pipe and the main pipe are not closed. According to the sixth invention, in the fourth and fifth inventions, since the jig can be divided freely, after welding the heat exchange pipe to the main pipe, the jig can be easily removed from the main pipe.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a heat exchanger according to an embodiment of the present invention.

FIG. 2 is a perspective view of main pipes 3, 4 and a heat exchange pipe 5.

FIG. 3 is a perspective view of a heat exchanger, wherein FIG.
(b) shows the main pipes 3 and 4 and the heat exchange pipe 5, and (c) shows the sheet 10 having irregularities.

FIG. 4 is an enlarged view of the concave portion 11 of the film 13;
FIG. 3 is a diagram showing an example in which a claw 18 is provided on a rim.

FIG. 5 is a diagram showing a method for manufacturing a heat exchanger.

FIG. 6 is a sectional view of main pipes 3 and 4 provided with a jig 15;

FIG. 7 is a view showing an example in which a taper 17 is formed on a support portion 15b of a jig 15;

FIG. 8 is a view showing another method of manufacturing the heat exchanger.

FIG. 9 is a view showing a conventional spacer.

FIG. 10 is a view showing a method of manufacturing a conventional heat exchanger, and showing a state where a tube is inserted into a hole via a sleeve.

[Explanation of symbols]

 Reference Signs List 3 supply side main pipe 4 return side main pipe 5 heat exchange pipe 10 sheet having irregularities 11 concave part 12 convex part 13 film 14 hole 15 jig 15a pin part 15b support part 16 cylinder member 18 nail

Claims (6)

(57) [Claims] 1. A supply side main pipe, a return side main pipe, and a plurality of heat exchange pipes communicating with the main pipes, and a fluid distributed from the supply side main pipe passes through the heat exchange pipes substantially simultaneously. In the heat exchanger configured to flow to the return side main pipe, a sheet having a length substantially equal to the length of the heat exchange pipe is provided, and a concave portion is formed in the width direction of the sheet in accordance with the interval between the heat exchange pipes. A heat exchanger, wherein the heat exchangers are arranged, the concave portions are formed along the length direction of the sheet, and the plurality of heat exchange pipes are fitted into the plurality of concave portions, respectively, and aligned. 2. The heat exchanger according to claim 1, wherein a surface of the sheet is covered with a film in a state where the heat exchange pipe is fitted in the recess. 3. The heat exchanger according to claim 1, wherein a claw is provided in the recess, and the heat exchange pipe fitted in the recess is stopped by the claw to prevent the radiation pipe from coming off the recess. 4. A supply-side main pipe, a return-side main pipe, and a plurality of heat exchange pipes communicating with the main pipes, wherein fluid distributed from the supply-side main pipe passes through the heat exchange pipes substantially simultaneously. And a method for manufacturing a heat exchanger configured to flow to the return side main pipe, wherein a plurality of holes are formed in the outer peripheral surface of each of the supply side main pipe and the return side main pipe so as to be arranged in the axial direction. A step of inserting a jig consisting of a pin portion projecting from each hole and a support portion supporting the pin portion into the main pipe, arranging a plurality of heat exchange pipes in accordance with the hole, and wrapping the open end thereof A step of inserting the pins into the open ends of the heat exchange pipes and welding the open ends to the main pipe. How to make a replacement machine. 5. A supply side main pipe, a return side main pipe, and a plurality of heat exchange pipes communicating with the main pipes, wherein fluid distributed from the supply side main pipe passes through the heat exchange pipes substantially simultaneously. And a method for manufacturing a heat exchanger configured to flow to the return side main pipe, wherein a plurality of holes are formed in the outer peripheral surface of each of the supply side main pipe and the return side main pipe so as to be arranged in the axial direction. A step of inserting a jig consisting of a pin part projecting from each hole and a support part supporting these pin parts into the main pipe, arranging a plurality of heat exchange pipes in accordance with the hole, and forming a cylinder at an opening end thereof. A step of inserting the members, and a step of inserting the pins into the cylindrical members and welding the cylindrical members to the open end of the heat exchange pipe and the main pipe. Manufacturing method of heat exchanger. 6. The heat exchanger according to claim 4, wherein the jig is divided into a pin portion and a support portion, and when the jig is welded, the jig is divided and removed from the main pipe. Production method.