KR101368309B1 - Heat exchanger for exhaust heat recovery - Google Patents

Abstract

The present invention relates to a heat exchanger for collecting exhaust heat. The heat exchanger includes: an upper cover plate (10) which covers the upper part to form an upper exhaust path (110); an upper heat transfer plate (20) which forms the upper exhaust path by being covered by the upper cover plate in the upper part; an middle heat transfer plate (30) to which multiple intermediate spacers (21, 22, 23, 24) are attached to form a supply path (120) which is curved twice and on which the upper heat transfer plate is attacked; and a lower cover plate (40) which forms a lower exhaust path (130) by being attached to the bottom surface of the middle heat transfer plate. By doing so, the exhaust paths are formed on the top surface and the bottom surface of the supply path so that heat exchange is performed on the top surface and the bottom surface of the supply path at the same time. Also, by changing the exhaust direction twice by installing multiple partition members on the supply path, a counter-flow heat exchange area and a cross-flow heat exchange area are formed so that the area for heat exchange is increased to the top and the bottom and the time for heat exchange is also increased. As a result, the heat exchange efficiency can be enhanced.

Description

Heat exchanger for exhaust heat recovery

The present invention relates to a heat exchanger for exhaust heat recovery, and in particular, in order to exchange heat between the air supply and the exhaust, the laminated heat exchanger is divided into an exhaust path and an air supply, but one air supply is positioned between the two exhaust paths to supply air from below and from above. A heat exchanger for exhaust heat recovery that can increase the recovery efficiency of exhaust heat contained in the exhaust gas by forming a partition member for simultaneously performing heat exchange and partitioning the air supply into a plurality of air supply lines to form a counter flow heat exchange area and a cross flow heat exchange area. It's about the flag.

As human needs for industrial development and quality of life increase, the use of air conditioners is increasing in households and industries. An air conditioner is installed to keep the indoor air always pleasant and clean, and these air conditioners supply the inside air of the building by heating or cooling.

At this time, the air conditioner circulates inside the building and introduces fresh outside air while discharging a part of the returned air to the outside of the building. In this process, the heated or cooled air is discharged to the outside in order to maintain a comfortable indoor temperature, It is necessary to supply the heat to the outside air again or to re-cool the outside air, so that the energy can not be utilized reasonably.

The counterflow heat exchanger for air exchanges heat paths formed between a plurality of hot air and low temperature air heat transfer plates without facing each other, and is used in a field where heat exchange is required without cooling or contamination of a heating space. As the device cooling, there are a box cooling device and a switchboard cooling device for a mobile communication repeater, and a ventilation device for saving energy by recovering an arrangement for ventilation of indoor air.

In the prior art, a flat thin plate heat exchanger plate having no uneven portion is spaced apart at regular intervals by a side supporter, and a plurality of heat exchanger plates formed between upper and lower plates of heat transfer fins folded in a triangle or semi-circle are arranged or stacked up or down. There is a counter flow heat exchanger formed by laminating heat transfer plates formed between the plates.

However, in the prior art, a plurality of thin plate heat transfer plates having no irregularities are laminated at regular intervals by a side supporter, which has a problem in that the heat transfer area is small, the heat exchange efficiency is low, and the size is increased for the same heat exchange amount. In the case of laminating the heat transfer plate formed between the upper and lower plates of the heating fins folded in a semicircular shape, the manufacturing process is complicated and there is a heat exchange problem, and the spacer is formed by laminating the heat transfer plate formed between the upper and lower plates. There is a problem in that the heat resistance at the contact surface is large because the heat resistance is not reduced because it is not integrally formed.

In order to solve this problem, Korean Utility Model Registration No. 20-0255179 discloses an "air counter flow heat exchanger", and FIG. 7 shows an exploded perspective view of an air counter flow heat exchanger according to the related art.

The counterflow heat exchanger for air according to the prior art is a heat transfer plate (1) formed by alternating plastic deformation of the upper projection (10) and the lower projection (11) on a thin plate material and parallel to each other, and the heating plate (1) at the height of the projection. A plurality of laminated members (2) and the left and right side members (3a, 3b) closing the sides of the laminated member (2) and the plurality of protrusions facing each other so as to form a flow passage spaced apart by a predetermined interval, and the front end of the air inlet and outlet And the upper and lower side members 5a and 5b, the upper and lower side members 3a and 3b, and the upper and lower side members 6a and 6b coupled to the front and rear side members 5a and 5b.

The counterflow heat exchanger for air according to the prior art has a plurality of top and bottom protrusions integrally formed on the heat exchanger plate of the counterflow heat exchanger for air to form a flow passage and serve as a heat transfer fin and a flow guide. And the heat exchange efficiency is improved by removing the contact heat resistance, but the heat-exchanging efficiency was not solved because the heat-exchanging surface is formed only on one side with the heat exchanger plate in contact with the exhaust and air supply.

The present invention is to solve the above problems, an object of the present invention is to form an exhaust path on the upper and lower surfaces of the air supply to the heat exchange in the exhaust heat recovery for improving heat exchange efficiency by the heat exchange at the same time the upper and lower surfaces of the air supply To provide a flag.

Another object of the present invention is to install a plurality of partition members for bending the air supply twice inside the air supply to form a cross-flow heat exchange area and the counter flow heat exchange area, and the cross-sectional area of the air supply to the exhaust passage more than twice the cross-sectional area of the exhaust passage It is to provide a heat exchanger for exhaust heat recovery to increase the heat exchange time by increasing the time that the air supply stays in the air supply to increase the heat exchange efficiency.

Exhaust heat recovery heat exchanger according to the present invention for achieving the above object includes an upper cover plate for covering the top to form an upper exhaust passage; An upper heat transfer plate covered with an upper cover plate to form an upper exhaust path; An intermediate heat transfer plate stacked on the upper heat transfer plate and having a plurality of partition members attached thereto to form a plurality of curved air supply paths; A plurality of heat exchangers of one set including a lower cover plate attached to the bottom surface of the intermediate heat transfer plate to form a lower exhaust path is characterized in that the stacking.

According to an embodiment of the present invention, the upper heat transfer plate and the lower cover plate is the same configuration, and the aluminum plate of the aluminum plate forming an air supply by covering the intermediate heat transfer plate; An edge bracket inserted into the bolt fastened to the bolt hole formed at the four corners of the square plate and assembled to form a left sealing member and a right sealing member; An intermediate bracket which is inserted and assembled together in a bolt fastened to a bolt hole formed in the middle of two sides forming the exhaust path of the square plate; It characterized in that it comprises a connecting bracket for connecting the sealing bar in the middle of the left sealing member and the right sealing member.

According to one embodiment of the invention, the intermediate heat transfer plate and the left side sealing member for sealing a portion of the front side of the left side to the air supply; A front sealing member sealing the whole of the front surface; A right sealing member for sealing a portion of the rear side of the right side to the air supply; A rear sealing member for sealing the entire rear surface; It is characterized in that it comprises a plurality of partition members attached to the air supply at regular intervals to form a plurality of sub air supply having a counter flow heat exchange area and a cross flow heat exchange area.

According to one embodiment of the present invention, a plurality of partition members are bent at a plurality of times at right angles to form a cross flow heat exchange region crossing the upper and lower exhaust passages and a counter flow heat exchange region opposite in direction to each other. It is characterized in that the counterflow heat exchange takes place at the same time.

According to one embodiment of the present invention, the cross-sectional area of the upper and lower exhaust passages is configured to be formed to be narrower than the cross-sectional area of the air supply.

According to an embodiment of the present invention, the thickness of the left and right sealing members attached to the upper heat transfer plate and the lower cover plate is 1/2 times the thickness of the left and right sealing members and the front and rear sealing members to the air supply. It is configured so that the cross-sectional area to the air supply air is twice or more wider than the upper and lower exhaust passages.

According to one embodiment of the present invention, the inlet and the outlet of the air supply is characterized in that it is configured to be more than two times narrower than the upper, lower exhaust passage.

According to the present invention, the exhaust path is formed on the upper and lower surfaces of the air supply air to simultaneously exchange heat on the upper and lower surfaces of the air supply air, and a plurality of partition members are installed in the air supply air so that the second direction is changed in the exhaust direction. The cross-flow heat exchange zone and cross-flow heat exchange zone are formed at the same time, while the cross-sectional area of the air supply is doubled compared to one exhaust path, which increases the time that the air supply stays in the air supply, increasing the heat exchange time, and the surface of heat exchange. By increasing the up and down to double the surface heat exchange can be improved heat exchange efficiency.

1A is an exploded perspective view illustrating an exploded view of one set of an exhaust heat recovery heat exchanger according to the present invention;
1B is an exploded perspective view separately illustrating each determination of the heat exchanger for exhaust heat recovery according to the present invention;
Figure 2a is a perspective view of the upper cover plate of the heat exchanger for exhaust heat recovery according to the present invention,
2b is a perspective view of the upper heat transfer plate of the heat exchanger for exhaust heat recovery according to the present invention;
2c is a perspective view of an intermediate heat transfer plate of the heat exchanger for exhaust heat recovery according to the present invention;
3 is a perspective view of assembling one set of heat exchangers by attaching each plate of the heat exchanger for exhaust heat recovery according to the present invention;
4 is an enlarged view in which the right side is enlarged with the air supply of one set of the heat exchanger for exhaust heat recovery according to the present invention;
5 is a perspective view of an intermediate heat transfer plate constituting the air supply of the heat exchanger for exhaust heat recovery according to the present invention;
FIG. 6 is a perspective view of a plurality of sets of one heat exchanger for exhaust heat recovery according to the present invention attached and assembled; FIG.
7 is an exploded perspective view of a counterflow heat exchanger for air according to the prior art.

While the present invention has been described with reference to particular embodiments, it is capable of being embodied in many different forms and is not limited to the embodiments set forth herein. Hereinafter, the present invention will be described with reference to the drawings.

1A is an exploded perspective view showing an exploded view of one set of exhaust heat recovery heat exchanger according to the present invention, and FIG. 1B is an exploded perspective view separately showing each determination of the heat exchanger for exhaust heat recovery according to the present invention.

Exhaust heat recovery heat exchanger according to the present invention includes an upper cover plate 10 for covering the upper portion to form the upper exhaust passage (110); An upper heat transfer plate 20 covering an upper portion by the upper cover plate 10 to form an upper exhaust path; An intermediate heat transfer plate 30 to which a plurality of intermediate spacers 21, 22, 23, and 24 are attached so that the upper heat transfer plate 10 is stacked on top of each other to form an air supply path 120 which is bent twice; It is configured to include a lower cover plate 40 attached to the bottom surface of the intermediate heat transfer plate 20 to form a lower exhaust passage (130).

The upper cover plate 10 may be made of a light metal material such as aluminum or a material such as a synthetic resin, and may be made of a polygonal plate such as a square plate or a hexagonal plate. The upper cover plate 10 may cover the upper surface of the upper exhaust path 110 and the upper heat transfer plate 20. Together form the upper exhaust passage (110).

The upper heat transfer plate 20 forms a bottom surface of the upper exhaust passage 110 and seals the left and right sides of the upper exhaust passage 110 while maintaining a constant distance from the upper cover plate 10 so that the exhaust air flows forward and backward. The left sealing member 22 and the right sealing member 23 is attached to.

In order to maintain a constant distance from the upper cover plate 10, the intermediate bracket 25 may be fitted and fixed between the upper cover plate 10 and the upper heat transfer plate 20 between the upper exhaust passage 110 inlet and outlet. .

The intermediate heat plate 30 forms an air supply passage 120 together with the upper heat transfer plate 20, the upper heat transfer plate 20 constitutes an upper surface of the air supply passage 120, and the intermediate heat transfer plate 30 forms the air supply passage 120. Half of the left side air supply passage 120 is sealed to the left side sealing member 32 which seals the front half of the left side of the left side of the air supply passage 120, and the front sealing member ( 33) the entire surface is sealed, and half of the right air supply 120 is sealed by the right sealing member 34 sealing the rear half of the right side of the air supply 120, and the rear sealing member 33 is configured to seal the rear surface.

Here, the left sealing member 32, the front sealing member 33, the right sealing member 34 and the rear sealing member 33 maintains a constant gap between the middle heat plate 30 and the upper heat plate 20. The cross-sectional area of the air supply 120 is twice as large as that of the upper and lower exhaust passages 110 and 130 so that the thickness of the upper and lower exhaust passages 110 is greater than twice the thickness of the left and right sealing members 22 and 23. Configure wide.

Therefore, since the cross-sectional area of the air supply passage 120 is larger than the cross-sectional areas of the upper and lower exhaust passages 110 and 130, the speed of the air supply passing through the air supply passage 120 is exhaust through the upper and lower exhaust passages 110 and 130. By passing slower than the speed of the heat absorbing heat energy from the exhaust of the upper and lower exhaust paths (110, 130) can be increased to increase the heat exchange efficiency.

The lower cover plate 40 is attached to the bottom surface of the intermediate heat transfer plate 20 to form a lower exhaust passage 130, and the intermediate heat transfer plate 30 constitutes an upper surface of the lower exhaust passage 130 and the lower cover plate ( 40 constitutes a bottom surface of the lower exhaust passage 130.

In addition, the left side sealing member 42 and the right side sealing member 43 are attached to the left side to seal the left and right side surfaces of the bottom exhaust passage 130 like the upper exhaust passage 110 so that the exhaust gas proceeds forward and backward.

The left sealing member 22 and the right sealing member 23 attached to the upper heat plate 20 also maintain a constant gap between the middle heat plate 30 and the upper heat plate 20 and are attached to the lower cover plate 40. The left sealing member 42 and the right sealing member 43 also maintain a constant gap between the intermediate heat plate 30 and the lower cover plate 40, the thickness of the left and right sealing members of the air supply (120) ( 32, 34 and half the thickness of the front and rear sealing members 33 and 35 so that the cross-sectional area of the air supply 120 is twice as wide as the upper and lower exhaust passages 110 and 130. .

Therefore, since the cross-sectional area of the upper and lower exhaust passages 110 and 130 is narrower than the cross-sectional area of the air supply passage 120, the speed of the exhaust gas passing through the upper and lower exhaust passages 110 and 130 is the air supply passing through the air supply passage 120. By passing faster than the speed of the air supply to the air supply 120, the heat energy can be contacted with more new exhaust heat to increase the heat exchange efficiency.

Fig. 2A shows a perspective view of the upper cover plate of the heat exchanger for exhaust heat recovery according to the present invention, and Fig. 2B shows a perspective view of the upper heat transfer plate of the heat exchanger for exhaust heat recovery according to the present invention, and Fig. 2C The perspective view of the intermediate heat exchanger plate of the heat exchanger for exhaust heat recovery is shown.

The upper cover plate 10 covers the upper heat transfer plate 20 to form an upper exhaust passage 110, and bolt holes that can be assembled by attaching to the upper heat transfer plate 20 by coupling means such as bolts in the four corners and the four sides. 11) is formed.

The upper heat plate 20 includes a square plate 21 made of aluminum to cover the middle heat plate 30 to form an air supply passage 120; Corner brackets 24 inserted into the bolts fastened to the bolt holes 21a formed at the four corners of the square plate 21, assembled together, and constituting the left sealing member 22 and the right sealing member 23; An intermediate bracket (25) inserted and assembled together in a bolt fastened to a bolt hole (21a) formed in the middle of two sides forming the exhaust path (110) of the square plate (21); It is composed of a connecting bracket 26 for connecting the sealing bar 27 in the middle of the left sealing member 22 and the right sealing member 23.

Since the upper heat exchanger plate 20 forms an upper surface of the air supply passage 120, the upper heat transfer plate 20 is sucked from the outside and passes through the air supply passage 120, and passes through the air supply passage formed by the air supply passage and the upper heat transfer plate 20. Ensure heat exchange with the exhaust.

Since the left side sealing member 22 and the right side sealing member 23 are attached to the left side and the right side of the upper heat exchanger plate 20 to form the upper exhaust passage 110 in which the left and right sides are sealed together with the top cover plate 10, Is discharged while passing through the exhaust passage 110 from the rear toward the front.

The middle heat transfer plate 30 shown in FIG. 2C includes a left sealing member 32 for sealing the front half of the left side of the air supply 120; A front sealing member 33 for sealing the whole of the front surface; A right sealing member 34 sealing the rear half of the right side of the air supply 120; A rear sealing member 35 to seal the entire rear surface; A plurality of partition members 36, 37 attached to the air supply 120 at regular intervals to form a plurality of sub air supply 120a, 120b, 120c, 120d, and 120e having a counter flow heat exchange area and a cross flow heat exchange area; 38, 39).

The upper heat transfer plate 20 is covered with the middle heat transfer plate 30 to form an air supply passage 120, and is exhausted by a plurality of partition members 36, 37, 38, and 39 attached to the inside of the intermediate heat transfer plate 30 at regular intervals. A crossflow heat exchanger region intersecting at right angles to the direction and a counterflow heat exchanger region opposite to the direction of the exhaust are formed.

Since the lower cover plate 40 has the same configuration as the upper heat transfer plate 20, a description thereof will be omitted, and the left and right sides are left and right sealing members 42 attached to the bottom surface of the middle heat transfer plate 30 so that exhaust is formed from the rear side to the front side. 43 to form a lower exhaust passage 130.

3 is a perspective view showing each plate of the heat exchanger for exhaust heat recovery according to the present invention attached to one set of heat exchangers, and in FIG. 4, the right side of the exhaust heat recovery heat exchanger according to the present invention is expanded. One enlarged view is shown, and FIG. 5 shows a perspective view of an intermediate heat transfer plate constituting the air supply of the heat exchanger for exhaust heat recovery according to the present invention.

1 set of exhaust heat recovery heat exchanger 100 according to the present invention is formed with a bolt hole 101 which can be fastened with bolts at the four corners and four sides, and is attached to another set to constitute one heat exchanger.

The upper cover plate 10 according to the present invention covers the upper heat transfer plate 20 to form an upper exhaust passage 110 as shown in FIGS. 3 and 4. The upper exhaust passage 110 flows from rear to front as indicated by the dotted arrow.

The air supply passage 120 is constituted by the upper heat transfer plate 20 and the intermediate heat transfer plate 30, and is sucked from the right side to the left side, and the air supply passing through the air passage 120 passes through the upper exhaust passage 110 and the upper portion. Heat exchange by the heat transfer plate 20 and at the same time heat exchange through the exhaust and intermediate heat transfer plate 30 flowing through the lower exhaust path (130).

The middle heat transfer plate 30 is half of the left air supply passage 120 by the left sealing member 32 which seals the front half of the left side of the air supply passage 120 as shown in FIGS. 2C and 5. The air is sealed, and half of the right air supply 120 is sealed by the right sealing member 34 which seals a 1/2 side of the rear side of the right side of the air supply 120.

In addition, the whole front surface is sealed by the front sealing member 33, and the whole back surface is closed by the rear sealing member 35. That is, the air supply 12 is configured to be blocked by the left and right sealing members 33 and 35 so as to flow from right to left.

The air supply passage 120 attaches a plurality of partition members 36, 37, 38, and 39 at regular intervals to form a plurality of sub air supply passages 120a, 120b, 120c, 120d, having a counter flow heat exchange region and a cross flow heat exchange region. By dividing into 120e), the amount of air passing through each of the sub-supplies 120a, 120b, 120c, 120d, and 120e is evenly distributed.

The plurality of partition members 36, 37, 38, and 39 are bent two times at right angles to form a cross flow heat exchange region that crosses the upper and lower exhaust passages 110 and 130 and a counter flow heat exchange region that is opposite in direction to each other. The cross flow heat exchange and the counter flow heat exchange occur simultaneously.

Since the plurality of sub-air supplies 120a, 120b, 120c, 120d, and 120e are bent twice by the plurality of partition members 36, 37, 38, and 39, the sub-air supplies 120a, 120b, 120c, 120d, The external air supply passing through the air supply 120e decreases in speed so that the time for passing through the air supply 120 becomes long.

That is, the external air supply is heat exchanged with the exhaust while staying longer than the exhaust in the air supply 120, the heat exchange efficiency is improved. However, configuring the number of bendings to the air supply more than two times may overload the air supply motor, and thus adjust the number of bendings to the air supply according to the capacity of the air supply motor.

The lower cover plate 40 is attached to the bottom surface of the intermediate heat transfer plate 30 by a coupling means such as a bolt to form a lower exhaust path 130. The lower cover plate 40 is the same as the upper heat transfer plate 20, but since the lower cover plate 40 forms the bottom surface of the lower exhaust path 130, the lower cover plate 40 does not directly contact the air supply. No heat exchange with

The lower cover plate 40 seals the left and right sides of the lower exhaust path 130 while maintaining a constant distance from the intermediate heat transfer plate 30 to seal the left sealing member 42 and the right side on the left and right sides so that the exhaust gas proceeds forward and backward. The member 43 is attached.

When the heat exchanger is manufactured in a large size, the gap between the left sealing member 42 and the right sealing member 43 of the lower exhaust path 130 may be irregular between the intermediate heat transfer plate 30 and the lower cover plate 40. Therefore, the intermediate bracket 45 may be inserted and fixed between the intermediate heat transfer plate 30 and the lower cover plate 40 at the inlet and outlet of the lower exhaust path 130 to maintain a constant gap.

Fig. 6 is a perspective view of a plurality of sets of the heat exchanger for exhaust heat recovery according to the present invention attached and assembled.

In the heat exchanger 100 for exhaust heat recovery according to the present invention, one set of the heat exchanger is attached to a plurality of heat exchangers, and the bolts 102 are fastened and stacked in a plurality of bolt holes 101 to complete one exhaust heat recovery heat exchanger.

The present invention is not limited to the specific preferred embodiment of the above-mentioned heat exchanger for exhaust heat recovery, and can be applied to more heat exchanger for exhaust heat recovery, and the present invention belongs without departing from the gist of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such modifications are within the scope of the claims as long as the changes are made to the technical idea forming.

10: upper cover plate 11: bolt hole
20: upper plate 21: square plate
22, 32, 42: left side sealing member 34, 43, 23: right side sealing member
30: intermediate heat transfer plate 33: front sealing member 35: rear sealing member 36, 37, 38, 39: partition member
40: lower cover plate 100: heat exchanger
101: bolt hole 110: the upper exhaust
120: air supply 130: lower exhaust passage

Claims (7)

An upper cover plate covering an upper portion to form an upper exhaust path;
An upper heat transfer plate covered with an upper cover plate to form an upper exhaust path;
Attached to the bottom of the upper heat transfer plate to form a plurality of air supply bent at a plurality of times at a right angle, the height of the air supply path is 2 to 2.5 times the height of the upper, lower exhaust passage so that the cross-sectional area of the air supply path is higher. An intermediate heat transfer plate to which a plurality of partition members are attached so as to be 2 to 2.5 times larger than each cross-sectional area of the lower exhaust passage;
A heat exchanger for exhaust heat recovery, comprising: a plurality of heat exchangers of one set including a lower cover plate attached to a bottom surface of the intermediate heat transfer plate to form a lower exhaust path. The method according to claim 1,
The upper heat transfer plate and the lower cover plate is the same configuration, and the rectangular plate of aluminum or synthetic resin material covering the intermediate heat transfer plate to form an air supply; An edge bracket assembled to the four corners of the rectangular plate and constituting a left sealing member and a right sealing member; An intermediate bracket inserted and assembled in the middle of two sides forming the exhaust path of the rectangular plate; Heat exchanger for exhaust heat recovery, characterized in that consisting of a connecting bracket for connecting the sealing bar in the middle of the left and right sealing member. 3. The method according to claim 1 or 2,
The intermediate heat transfer plate may include a left sealing member sealing a portion of the front side of the left side of the air supply path; A front sealing member sealing the whole of the front surface; A right sealing member for sealing a portion of the rear side of the right side to the air supply; A rear sealing member for sealing the entire rear surface; An exhaust heat recovery heat exchanger comprising a plurality of partition members attached to the air supply at regular intervals to form a plurality of sub air supply lines having a counter flow heat exchange area and a cross flow heat exchange area. delete delete delete 3. The method according to claim 1 or 2,
The heat exchanger for exhaust heat recovery, characterized in that the inlet and the outlet to the air supply is configured to be twice as narrow as the upper and lower exhaust passage.

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