JPS6142006Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heat exchanger element used in hot water circulation type floor heating systems, other heating systems, and the like.

The heat exchanger element is usually used in connection with a heat medium circulation device or the like. The heat exchanger element passes a heat medium such as hot water sent from a heat medium circulation device or the like through the heat exchanger element, and performs heating by exchanging heat.

As shown in FIGS. 1 and 2, a conventional heat exchanger element includes a planar bag 1, and openings 2 and 3 are provided on the bottom surface of the bag so that a heat medium can flow inside. . The upper and lower wall surfaces of the bag body 1 are formed of topsheets 4, 4' made of rubber, resin, or the like that do not allow heat medium to pass through. Inside the topsheets 4, 4', inner sheets 5, 5' made of fabric or the like are provided as necessary, forming a double wall structure. The inner sheets 5, 5' and the top sheets 4, 4' are usually fixed to each other by heat welding or adhesive. The bag body 1 consists of a vertically undulating wavy monofilament 6 alone, or the wavy monofilament 6 and a straight line that intersects perpendicularly thereto, so that a predetermined interval is left between the upper and lower walls so that the heat medium can flow inside the bag body 1. A spacer 8 such as a corrugated mesh consisting of a filament 7 is provided. 9 is a rug such as a carpet.

At each end of the heat exchanger element, as shown in FIG. 3, the ends 10, 10' of the two upper and lower surface sheets 4, 4' are extended outward and bonded together. They are joined 11 by means such as thermal welding. These end portions 10, 10' are ends along the longitudinal direction (arrow direction) when a long object is manufactured continuously, and the end openings in the width direction are separated as shown in FIG. The end portions 12, 12' are sandwiched and sealed from both upper and lower surfaces with sealing materials 13, 13'.
In such a configuration, when the heat transfer medium passes through the bag, internal pressure acts in the direction of the arrow shown in FIG. Peeling force (peeling force) works. For this reason, the bonding surface 11 is likely to be unable to resist this peeling force and be opened.
The destruction of the unsealed part due to this separation is caused by the surface sheet material 4,
This occurs with a force smaller than the material strength of 4'. When some peeling begins to occur at the weakly bonded portion 23, the peeled area gradually increases from that portion, and eventually a phenomenon occurs in which the heat medium inside the bag leaks through this peeled portion. This has been a drawback of conventional heat exchanger elements.

This idea was devised in view of these circumstances, and by making the end opening of the top sheet of the heat exchanger element have a special closed structure, peeling does not occur and there is no need to worry about heat medium leakage. It provides no heat exchanger element.

In this device, two wall materials that do not allow the heat medium to pass through are arranged at a distance that allows the heat medium to pass between them, and the end openings of these two wall materials form one of them. The gist of the heat exchanger element is a heat exchanger element in which the ends of the sheet material are folded back, overlapped with each other, and bonded to each other to be sealed.

This will be explained in detail below.

FIGS. 6 and 7 show the state of an example of the heat exchanger element according to the invention before and after the longitudinal end (in the direction of the arrow) is closed. In FIG. 6, the upper and lower surface sheets 4 and 4' that constitute the two upper and lower wall materials that form the bag have one end thereof (the end 10' of the surface sheet 4' in FIG. 6). , a folded portion 14 is provided extending to a length sufficient to overlap the end portion 10 of the other topsheet 4. The folded portion 14 is folded upward along the first fold line 16 located directly below the edge 15 of the other topsheet 4, and then is folded back along the first folding line 16 located directly below the edge 15 of the other topsheet 4, and then It is folded inward along the second folding line 18 that takes into account the thickness width 17, and is overlapped on the end 10 of the other topsheet 4 as shown in FIG. They are joined by heat welding or adhesive. In this joining structure, when internal pressure is applied, the pressure is applied to the upper and lower walls 20, 20' and the folded side wall 21 as shown by arrows in FIG. In this case, the upper and lower walls 2
The force pushing 0,20' from the inside to the outside is the joining surface 1
9 does not generate peeling force that causes it to peel off. side wall 2
Since the force pushing 1 outward only acts as a tensile force on the joint surface 19, it does not become a peeling force. Therefore, the peeling phenomenon that occurs in the conventional case does not occur at the joint surface 19. Note that, if necessary, as shown in FIG. 9, another seal reinforcing material 22 is pasted onto the joint, making the joint even stronger.

In addition, when the material for making bags is not a long item with a continuous interior along its longitudinal direction, but is manufactured into a bag with a predefined length,
The end openings in the width direction may also have the same closed structure as the end openings in the longitudinal direction.

Since the heat exchanger element of this invention has the above-mentioned configuration, even if pressure is applied inside the bag, peeling does not occur unlike conventional heat exchanger elements, and the joint strength is equal to the material strength of the top sheet. It becomes strong. Therefore, there is no need to worry about leakage of the heat medium.

In addition, when creating the heat exchanger element, the cut-off edges when cutting the continuous double-layered fabric that will become the bag, that is, the edges along the width direction, are sandwiched with another sealant as described above. However, when using such a sealing structure, the sealing process is complicated and costly, and there is a difference in the materials between the sealing material and the top sheet. Welding or adhesion failure may occur due to the
These may lead to leakage of the heating medium. This problem can be solved by using the configuration shown in FIGS. 10 to 13.

That is, when creating a double structure fabric, along the continuous production direction (arrow direction), a double structure part 31 with dimensions that match the standard of the heat exchanger element as shown in FIG.
and plain weave portions 32 are formed alternately. Next, top sheets 4 and 4' made of rubber or synthetic resin are laminated on the upper and lower surfaces of this double-layered fabric, as shown in FIG. The plain weave portion 32 is not brought into close contact with the topsheets 4, 4', and only the double structure portion 31 is fixed to the topsheets 4, 4' by thermal welding or bonding. The plain weave part 3
2, the upper surface sheet 4 in FIG.
It passes through the center 33 of the plain weave portion 32 and cuts in an oblique direction as shown by the dashed dotted line to reach the lower surface sheet 4'. In each of the double-structure fabrics separated by this cutting, cut ends of the plain weave portion and separated ends 34, 34' of the topsheet 4 or 4', that is, portions that are not joined to the plain weave portion, are formed. ing. Therefore, as shown in FIG. 13, the cut-off end 34' of the topsheet 4' is folded back toward the topsheet 4 side, overlapped with the end 35 of the topsheet 4, and joined 36 by heat welding or adhesion. Note that the cut end 37 of the plain weave portion 32 is folded back in the same manner as the top sheet 4', and is housed inside the folded portion of the top sheet 4'. The other separated end 34 is similarly joined to the topsheet 4'. With this configuration, the openings at the ends along the width direction are also tightly closed in addition to the closing structure at the ends along the longitudinal direction of the double-layered fabric, so that the entire circumference of the heat exchanger element is sealed. will be completely sealed. Note that another seal reinforcing material may be bonded to the joint portion in the width direction as well, if necessary, in the same manner as in the longitudinal direction explained with reference to FIG.

Therefore, by adopting such a configuration, the joint exhibits strong joint strength, and even if strong pressure is applied to the inside of the bag, peeling will not occur, and there will be no fear of leakage of the heat medium. Also,
Since a part of the top sheet is used for bonding, there is no need for a separate sealing material, reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view with a part of the heat exchanger element cut away, Fig. 2 is a perspective view with a part of the bag of the heat exchanger element cut away, and Fig. 3 is a conventional heat exchanger. FIG. 4 is a partial cross-sectional perspective view showing the joined state of the ends along the longitudinal direction of the heat exchanger element; FIG. 4 is a perspective view showing the joined state of the ends along the width direction of a conventional heat exchanger element; FIG. Figure 6 is an explanatory diagram of the internal pressure distribution state of a conventional heat exchanger element and the peeling of the joint surface due to peeling.
The figure is a partially cutaway perspective view showing the folded portion of the longitudinal end of the heat exchanger element of this invention, and FIG. 7 shows the joined state of the longitudinal end of the heat exchanger element of this invention. Fig. 8 is an explanatory diagram of the internal pressure distribution state of the heat exchanger element of this invention, and Fig. 9 is a partially cutaway perspective view showing the heat exchanger element in which a reinforcing material is pasted to the end joint to strengthen the heat exchanger element. FIG. 10 is a perspective view of a double structure fabric having a double structure part and a plain weave part, and FIG. 11 is a partially cutaway perspective view showing the state.
Figure 12 is a perspective view of the double-layered fabric layered with a top sheet as shown in Figure 0, Figure 12 is a vertical cross-sectional view showing the state in which the plain weave portion of the heat exchanger element in Figure 11 is cut diagonally, and Figure 13 is the FIG. 3 is a longitudinal cross-sectional view showing a joined state of the ends of the exchanger element along the width direction. 1...Bag body, 4, 4'...Top sheet, 10,
10'12, 12', 35... end, 19, 36...
Joint surface, 14, 34, 34'... folded part, 3
1... Double structure part, 32... Plain weave part.

Claims (1)

[Scope of utility model registration request] Two wall materials that do not allow the heat medium to pass through are arranged at a distance that allows the heat medium to pass between them, and the end openings of these two wall materials form one of the sheet materials. heat exchanger element whose ends are folded back and sealed by being overlapped and joined to the other.