SE534381C2 - Heat exchanger with flow-controlling adhesive pattern and method of making it - Google Patents

Description

534 381 .L By means of the pattern of the duct-forming strings (11), the amount of air (15) from the ventilated space is distributed more evenly down over the surface of the exchanger. The air from the ventilated space changes direction and passes the surface (16) where the countercurrent change takes place by convection to incoming fresh air (18) which passes in the opposite direction in the ducts of the disc.

Exchanged exhaust air changes direction again and passes out through duct patterns, leaving the exchanger (17). Switching supply air to ventilated space leaves the exchanger (19).

The design of the joint is also characterized by the fact that the tightness of the exchanger can be guaranteed internally and thus meet the requirements where return air from premises must not occur.

The design is also characterized by the fact that the temperature differences between supply air and exhaust air through the exchanger are limited, which means that the so-called freezing is at such a low level that the normal technical solutions for defrosting exchangers can be completely avoided.

Description of drawings Fig. 1 illustrates machine for applying glue strings according to predetermined pattern on duct plastic sheets. The duct top (1) is placed on the surface and suction-proof with negative pressure via holes (2) in the table top. Application head (3) which is fixed in X-Y cradle (4) moves over the surface and applies the joining material.

Fig. 2 illustrates the basic construction of the heat exchanger. Exhaust air from space is led into the exchanger in part marked (5) with ducts formed by the joint according to the pattern (figure 3). Exhaust air (6) is led out of the exchanger through ducts formed by patterns. Incoming fresh air (7) passes straight through the exchanger in the panels of the panel board and is heated by convection between the parts of the exchanger and leaves the exchanger on the opposite side (8).

Fig. 3 illustrates patterns for applying joints. Adhesive strings (11) for forming the channels that control and distribute the air flow performed on both sides of the center line of the pattern (10). The channel-forming strands (1 1) are made in ascending length from the base line (09) of the exchanger. Spacer gluing (13) in short strands placed with c-c dimensions in a number or design that does not cause densification so that pressure drop increases. Joint around outer edges (12 +14) so that the space between boards is delimited to a chamber through which air can pass.

Fig. 4 illustrates the path of the air through the pattern. The air from the ventilated space is led into the exchanger through the inlet (15). The air then passes down through the exchanger and is led out over the surface (16) where convection takes place according to the countercurrent change principle. The air from the ventilated area is led out through the exchanger (17). Fresh air to a ventilated space is led into ducts (18) on the duct plate (20) where convection takes place against surrounding surfaces. Air to ventilated space leaves the exchanger (19).

Claims (6)

534 381 09 Patent claims Heat exchanger, built up of kanal your duct panels (20) comprising longitudinally extending ducts which are joined with glued spacer materials, the heat exchanger being characterized by the joining by means of an adhesive pattern which distributes fl the gap (15) across the ductwork flow direction so that the fate (16) is directed in the opposite direction compared to the fate direction (18 to 19) of adjacent heat exchanger chambers inside the channels, the adhesive pattern comprising adhesive strands (11) starting from a baseline (9) on the channel disk, the adhesive strands being placed one center line (10) has the shortest length and then increases the length of each glue string, and that the mutual distance between two subsequent glue strings (II) closest to the center line is shortest and then increases the distance for each subsequent mutual distance. Heat exchanger according to claim 1, characterized in that the joining is performed so that a distance is formed between two subsequent duct plates so that air can pass. Heat exchanger according to one of Claims 1 to 2, characterized in that the incoming and outgoing connection for one air stream takes place on the same side (15 + 17) in the heat exchanger. Heat exchanger according to one of Claims 1 to 3, characterized in that the number of adhesive strands (1 1) forms at least 4 channels on each side of the center line (10) of the heat exchanger. Heat exchanger according to one of Claims 1 to 3, characterized in that the joining is carried out so that the angle of the strands towards the baseline (9) is 90 degrees or less. Heat exchanger according to one of Claims 1 to 3, characterized in that the joining is carried out so that the outer continuous 534 381 fr joining takes place on three adjacent sides in the vicinity of the outer edge (12) of the heat exchanger and a shorter joining (14) to form a delimited space. . . Method of producing heat exchangers according to one of Claims 1 to 6, characterized in that a duct board (20) is applied with adhesive strands (1 1) according to a pattern of sealant with pre-programmed application equipment.