JPS6329195A - Honeycomb type heat exchanger - Google Patents

Abstract

PURPOSE:To improve a rate of heat exchanging operation by a method wherein adjoining sheets are piled up to alternately form adhered parts and non-adhered parts, they are expanded in such a direction that the non-adhered parts are moved away from each other and the adhered parts between a plurality of honeycomb passages formed between the sheets are made discontinuous. CONSTITUTION:Primary gas flow A enters one end surface of a honeycomb type heat exchanger 13 and flows in a flow passage 17. Disturbed flow is generated at non-adhered parts 7a, 8a and 9a forming non-continuous parts of the adhered parts 4a, 5a and 6a and then the pattern of flow changes. A change of the flow is repeated and the primary gas flow A does not show a continuous constant flow. In turn, a secondary gas flow B enters another end surface and similarly does not show a constant flow in the same manner as that of the primary gas flow A. Therefore, only a slight interface layer is formed in the flow passage enclosed by the adhered parts 4a, 5a and 6a and as a whole a section between the interface layers becomes short. At this time, the primary gas flow A and the secondary gas flow B are heat exchanged with each other through a craft paper 1 between a first block and a second block. With this arrangement, an efficiency of heat exchanging operation is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heat exchanger that reduces heat loss during ventilation.

BACKGROUND OF THE INVENTION In recent years, heat exchangers have been incorporated into ventilation systems to recover exhaust heat and reduce heat loss. As the heat exchanger, there is known a structure in which blocks in which corrugated spacer plates are fixed from above and below with flat partition plates are stacked so as to form flow passages for the primary air flow and the secondary air flow. However, in the configuration described above, - the blocks forming the popular air flow passage and the secondary air flow passage create an overlapping portion in the partition plate. The shaped part is a heat transfer surface where the primary air flow and the secondary air flow exchange heat, and based on the idea of heat exchange that if the material is the same and the heat transfer area is the same, the thinner the material, the higher the heat exchange efficiency. If the thickness increases, the heat exchange efficiency will decrease because the thickness will double.

A honeycomb heat exchanger 100 shown in FIG. 3 has been proposed to solve the above problems. The honeycomb heat exchanger 100 has a sheet 1 and a sheet 1, as shown in FIG.
01. Adhesives 104, 106 and 106 are applied except for the parts where discharge openings are to be formed at 102 and 103.

The application position is the adhesive 105 of sheet 1o2 between the lines of adhesive 104 of sheet 101 when the sheets are overlapped.
Also, apply so that the adhesive 106 on the sheet 103 is between the lines of the adhesive 106 on the sheet 102. Adhesives 107, 108° 109 are applied to the edge of each sheet 101, 102, 103 on the side where the opening is to be formed in a direction perpendicular to the adhesives 104, 106° 106.
For sheets 101 and 103, apply adhesive 107 along the edges.
, 109, and on the sheet 102, the sheet) 101,
The adhesive 103 is applied at a position closer to the adhesive 106 than the adhesives 107 and 109. As shown in FIG.

Each sheet configured as above is 101,102°10
3, stack with 102 j @, then 180 on the same plane
After rotating the sheet 101,102°103,1
Laminate on page 1 of 02. Then each sheet 101.102
, 103 expand in the direction away from each other and the cut portions 110, 11
1, each sheet 101, 102, 10
A honeycomb heat exchanger 100 is obtained in which a plurality of flow passages are formed between the non-bonded portions of No. 3. (For example, Japanese Patent Application No. 59-2
83816) Problems to be Solved by the Invention In such a conventional configuration, the honeycomb heat exchanger 100
Because a constant airflow flows continuously in the primary and secondary airflow paths, the flow tends to be laminar, which causes a problem of formation of a boundary layer on the heat transfer surface and a reduction in heat exchange efficiency.

The present invention takes these conventional problems into consideration and aims to provide a honeycomb heat exchanger with high heat exchange efficiency by making the boundary layer formed on the heat transfer surface as short as possible.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a method in which adjacent sheets are laminated so as to form a bonded portion and a non-bonded portion, and the non-bonded portions are spread in a direction away from each other. A honeycomb heat exchanger is constructed in which a plurality of honeycomb-shaped flow passages are formed between the sheets, and the bonded portions between the flow passages are discontinuous.

Effect With this configuration, the airflow flowing through each flow path changes shape at the discontinuous part of the bonded part, and does not become a continuous, constant flow, so a boundary layer is created in the flow path formed by the bonded part. This means that heat exchange efficiency is improved.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2. In Fig. 2, A1 and No. indicate the adhesive (
1.2.3 is kraft paper, and adhesive parts 4.4a and 5.5a are placed on top of it.
, 8, 6a as the non-adhesive part 7. It is formed so that S and S are at a constant interval. Note that each of the bonded portions 4a, 5a, and 8a forms non-bonded portions 7a, 8a, and 9a at regular intervals, making them discontinuous. The adhesive part 4° 4a of the kraft paper 1 is located in the center of the non-adhesive part 8 when the kraft paper 2 is overlapped, and the adhesive parts 6, 6a of the kraft paper 2 are located at the center of the non-adhesive part 8 when the kraft paper 3 is overlapped. It is formed so as to be located at the center of the non-bonded part 9.

Also, the adhesive parts 4 at both ends of the long sides of each craft paper 1, 2.
, 6.6 are formed continuously in the longitudinal direction from the cutting line Y-Y. Also, the adhesive parts 4b and 6b are arranged at right angles to the adhesive part 4.6 so that the distance is the same as that between the adhesive parts 4 and 5 when the kraft paper 1 and the kraft paper 2 are overlapped. Form in the direction. Also kraft paper 2
Similarly, for the adhesive part 6b and the adhesive seb of the kraft paper 3, the distance when the kraft paper 2 and the kraft paper 3 are stacked is the same as the distance between the adhesive part 6 and the adhesive part 6 and the adhesive part 6. , and formed in a direction perpendicular to the adhesive portion 6.6.

The kraft paper 2.3 is provided with a score line XX in addition to a score line Y-Y for cutting, thereby forming a cutout portion 10.11.

A first block in which kraft paper 1.2.3 with adhesive portions formed as described above is laminated and bonded in the order of 1.2, 3°2;
A plurality of first blocks and second blocks which are rotated 180 degrees on the same plane are laminated and bonded alternately, and the first blocks or second blocks at the top and bottom portions are fixed with aluminum plates 12. , the non-adhesive portions 7, 8.9 of the kraft paper 1.2.3 are spread apart, and the cut portions 10.11 are removed to form the honeycomb heat exchanger 13 shown in FIG. The honeycomb heat exchanger 13 has a discharge port 14 for the primary airflow A created by removing the cutout 10.11, a discharge port 16 for the secondary airflow B, and a shielding portion 18. for the primary airflow A. Secondary airflow B
A flow path 17 for the primary airflow A and a flow path 1e for the secondary airflow B are formed as a result of expanding the non-bonded portions in the direction away from each other.

With the above configuration, - the fire flow A is transmitted through the honeycomb heat exchanger 13
The non-bonded portion 7 flows through one end surface of the flow path 17 and forms a discontinuous portion of the bonded portions 4a, 5a, and 8a.
At points a, 8a, and 9a, turbulence is generated and the form of the flow changes. This change in flow form is repeated, and the primary air flow A does not flow in a continuous and constant manner. On the other hand, the secondary air flow B flows in from the other end face and, like the fire flow A, does not have a constant flow. Therefore, only a small amount of boundary layer is formed in the flow path surrounded by the adhesive parts 4a, 5a, and 8a, and the boundary layer section as a whole becomes short. At this time, heat is exchanged between the flame stream A and the secondary air stream B via the surface of the kraft paper 1 between the first block and the second block.

As described above, according to this embodiment, by making the bonded parts 4a, 5a, and 8a provided to form a plurality of flow paths discontinuous, the flow of the airflow is not constant and is less likely to become laminar. The section where the boundary layer is formed can be shortened, and heat exchange efficiency can be improved.

In the example, kraft paper that can exchange temperature and humidity was used, but non-moisture-permeable materials such as aluminum foil or resin film that exchange only temperature may also be used, both of which are more efficient than conventional heat exchangers. The heat exchange rate is improved.

According to the present invention, as is clear from the description of the embodiments above,
- The flow forms of the flame stream and the secondary air stream are not constant and are less likely to become laminar. Therefore, the section where the boundary layer is formed can be shortened, and the effect of improving heat exchange efficiency can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a honeycomb heat exchanger according to an embodiment of the present invention, Fig. 2 is a diagram showing the formation pattern of the adhesive part of the honeycomb heat exchanger, and Fig. 3 is a conventional honeycomb heat exchanger. FIG. 4 is a perspective view of the same honeycomb type heat exchanger, and FIG. 1, 2, 3-kawa-kraft paper, a, aa, 4b. 5.5a, 5b, 6, 6a, 8b=---adhesive part, 7°7a, 8, 8a, 9, 9a---non-adhesive part, 13...Honeycomb type heat exchange vessel. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 11. . ,lh,5,5. Jb, G, G,
, Gb, -$41F7. 'a, B, Bh, 9.17a゛-'1FJLt Figure 3

Claims (1)

[Claims] Adjacent sheets are laminated so as to form a bonded part and a non-bonded part with each other, and the non-bonded part is spread in a direction away from each other to form a plurality of honeycomb-shaped flow passages between the sheets, and between the flow passages. A honeycomb heat exchanger with discontinuous bonded parts.