JPS58156190A - Heat exchanger - Google Patents

Abstract

PURPOSE:To obtain a heat exchanger of high efficiency by a method wherein a corrugated section is formed at the center of a ceramic plate in the longitudinal direction with the crests of the corrugation held projecting upward and the troughs thereof held projecting downward with respect to the plane surface of the plate and the projecting open surfaces are covered with flat plates from on both sides so that the corrugated section is also made available for direct heat exchange operations. CONSTITUTION:A fluid, for example, a high temperature exhaust gas which has entered the heat exchanger from below a plane section 3 parallel to the side surface A of an inlet section B1 passes below a plane section 4, then below the corrugated section B1 by changing its direction by 90 degrees and is discharged through the plane section 3 of the corrugated plate B on the side of a flowout section B3. On the other hand, another fluid, for example, secondary air passes above a plane section 5 parallel to the plane surface A of the inlet section B1, passes above the plane section 4 of the corrugated plate B1, then above a corrugated section B2 by changing its direction by 90 degrees to reach the flowout section B3 and is discharged from the plane section 5 forming the flowout section. Consequently, the high temperature exhaust gas and the low temperature secondary air do not mix with each other and exchange heat through the corrugated section B.

Description

[Detailed description of the invention] The present invention relates to a highly efficient heat exchanger.

Conventionally, heat exchangers used in heaters that heat secondary air with high-temperature combustion exhaust gas or heat fresh exterior wall air with heated combustion gas are shown in Figure 1. As shown, corrugated plates l and flat plates - are stacked alternately, and the directions of the corrugated plates are alternately perpendicular to each other, so that m1 is smaller than the direction of arrow Y.
If exhaust gas is sent and secondary air is sent in the direction of arrow 2, these will pass through the first-stage pot without mixing and undergo heat exchange through the flat plate.

However, the corrugated plates do not act as walls for heat exchange, and the only plates that can exchange heat in Figure 1 are the three flat plates. The present invention improves this, and the corrugated plate is also useful for heat exchange, and has the shape as claimed in the claims.

This will be explained in detail regarding direction #A. Flat 1i: A shown in Figure 1 and a plan view of corrugated plate B and m*mKmp in Figure 1.
-P′< cross-sectional view, Fig. 1 is a cross-sectional view showing new development along the 4th rIAK line R-mic, striped J-
In the inflow part 81, a plane part J forming an inlet for the first fluid, a flat plate part for mixing the first fluid and other fluids, and an inlet for the other fluid are formed on the side surface. The flat part parallel to the flat part! have. A cross-sectional view of the center corrugated plate 16Bg of order 0 is shown in FIG. The height of the peak 7 is the same as that of the part J forming the inlet for one fluid, and the valley wAt is a flat part forming the inlet for another fluid! The zero-order outflow part B1, which has the same depth as the inflow part sB1, has the same structure as the inflow part sB1, and has a flat part in the center. Now place the corrugated plate B on top of the flat plate, and then lay the flat plate A on top of it. It will look like Figure 7. V is a nine-closing plate that closes both end faces that are straight to the wave Kfl.

10 is a nine closing plate that closes both sides of #ILs.

Next, a sectional view taken along line e-Q' in FIG. 1 of *I[ section is shown in FIG. 1, and a sectional view taken along -R-ic is shown in FIG. 2.

- A plane part J forming an inflow part for fluid and a plane part forming an inflow part for other fluids! are both airtightly adhered to the flat plate, and the closing plate lc of the closing plate F@- on the distal end surface of the platform is also adhered to the end surfaces of the flat plate A and the corrugated plate B to the trachea.

Next, to explain the principle of operation, a fluid flowing in from below a plane sJ parallel to the side wall of the inflow part Bl, for example, high-temperature exhaust gas in this case, passes below the plane part ≠ and changes its direction at right angles. passing under the corrugated plate part B2 and flowing out ml
Bs (DH is discharged through the plane sJ of the corrugated plate B in the H direction. - Force fluid, for example, secondary air, passes above the plane part l parallel to the plane AK on the side surface of the inflow part B1, and is discharged through the plane sJ of the corrugated plate B. Flat
Wave 111i passes above Zhengsan and changes direction at right angles.
A flat section that passes above Bx, reaches the outflow section BsK, and forms the outflow section! more excreted.

Therefore, the l116 exhaust gas and low m order air are not mixed, and if the corrugated sheet Bt is superimposed on the zero order flat kA which is heat exchanged by IIILIIjiB, the ti
Since the hot exhaust gas flows through S and also heat is exchanged through the flat plate, all surfaces of the heat exchanger according to the present invention function as a heat exchanger, compared to the conventional heat exchanger shown in Figure 1. Honeycomb fjIWm exchange shows more than twice as many exchange fathers as compared to honeycomb fjIWm exchange. Note that the high temperature exhaust gas inlet is closed as described above, and if low temperature secondary air is introduced from the outflow mB1111111, countercurrent heat exchange will be performed, and the upper exhaust gas and secondary air should be output to the opposite side. = r, for B of kneading machine B + 1 part J of the rice cake, bend it downwards, and add IIIk layer to flat plate A [7, also for 1 part J of flat plate On the other hand, it only needs to be folded upwards, since it has less support compared to the wave & BC1 inflow corridor B1 and outflow m Bs kj wave m Bm. If the uneven surface of the flat plate is provided with metal having protrusions in the shape of a cone or a pyramid, the strength of the 111 parts can be increased because it can be supported.

In addition, if the tops of these corrugated plates B are brought into contact with the flat plate AK, the whole will be hardened, and if they are not bonded, the strength will be slightly inferior, but some of the fluid for heat exchange will be at the tops of the waves. and t to compensate for the pressure difference between the fluids.

Next, regarding the materials to be used, fluid-impermeable heat-resistant ceramics can be advantageously used; for example, dense films of silicon nitride, silicon carbide, alumina, cordierite, mullite, beryllia, and zirconia are preferred; Also advantageous are low-g glass or glass ceramics.

To produce this, add 4F mechanical fat to the above inorganic powder and cast into a thin film using a μm Schiller mold or doctor blade to form a green sheet. Pressure is applied in a gold solder with a corrugated shape.
Shape m.

Stack these on kslJ1g47- as shown in the picture, glue both ends and one end using the same slurry, and after drying,
#&! in ak where each safic particle is sintered! 1, or use the above green sheet as a member 11cyl, flat plate A
They may be set alternately on the corrugated plates B' and folded back.This will be explained in more detail in the following embodiments.

Example Heikyo Gokurei Jμ Ahθ1 powder, Honbushi clay reference, Magne 7
Ya powder--t- added, methacrylic acid isobutyl ester 7%, nitrocellulose l-, diocnal phthalate 0
．． Add 1% and then add trichlorethylene and n-butanol as a medium and mix to form a fluid slurry. After degassing under reduced pressure, pour it out onto a green plate to remove heat and enjoy the bath additives. Make 1 green sheet of Saisa QJ-. Cut this into width/θOm and length 4I00m 1i L, #
As shown in the JI+ view in Figure 410, the entire mold brace is shaped to have an inner end, a medium heat, a flat section A, and a corrugated section B in the middle.

Next, at the left end flat plate A and the corrugated plate HOjJi field-C1, bend the corrugated sheet B toward the flat plate AO by 10'', then at the boundary! If you repeat this, you will end up with a Norunikafu as shown in the Somasazono t-14// figure, and if you close it with a green sheet of Nga on both sides and one end of the technique section. It becomes a honeycomb structure as shown in the perspective view at the 7th λ-, and the transverse direction of the direct entry part B+ and the corrugated plate part B2 are shown in Figure 1J,
It looked like the first reference. This is calculated by heating up to 1000℃ in the atmosphere at the rate of jOc/hour, and the temperature rises to 14℃ in the atmosphere.
Bake at 00℃ for 3 hours! Jl becomes a densely sintered heat exchanger, and if it passes through the exhaust gas of the gas furnace with an upward temperature in the E/direction of the figure, it will be discharged from the E direction, and if it passes through the secondary air in the -force Fi direction, it will be discharged from the F CO. The secondary air is discharged from the hot combustion exhaust gas and the secondary air is exchanged between both the flat plate and the corrugated plate of the flat plate part A and the corrugated plate part B, and the secondary air is efficiently heated by milling. was completed. This is because, as shown in Fig. 1, in the conventional heat exchange method, heat is exchanged only by half &-2, and the corrugated plate l has only the function of providing space, whereas in this embodiment, the corrugated plate and *& , heat exchange also takes place between the corrugated plate and the flat plate, and the surface area is the same pitch O@(1)g
About 2 times less than e-rice products! This is because it will double. The line work was also easy because the long tape-shaped green sheets were folded at one-foot intervals, and the main part of the work was the roller.

Note that in this example, rounding is performed to include glare.

I reduced the a of the beast and made it coarser, but in the actual product, the pitch of the technique is extremely small, and if you increase the L and ak, it will be cut.
It becomes a highly efficient heat exchanger.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional orthogonal TII heat exchanger, and Figure 1 is a plan view of the heat exchanger of the present invention.
The plan view of Seirei B, the assembled drawing is a cross section rIIi diagram based on the embroidery P-p' of the corrugated plate B, and the j-th is the same < 1l according to Q-Q'
Fr direction view, Figure 1 is a sectional view taken along line R-R', Figure 7 is a cross-sectional perspective view of the simplest flat plate of the heat exchanger assembled with these, Stripe 1 is a cross-sectional perspective view of the corrugated plate part, The silk diagram is a cross-sectional oblique A view of the flat plate part, the IO diagram is an oblique M view of the green sheet of the example, and Figure 7 is a front view when the green sheet is folded.
Figure 1/J is a perspective view of this with the technical part and end face closed, Figure 1J is a sectional view of the flat plate part, and Figure 1 is a sectional view of the corrugated plate part.

Claims (1)

[Scope of Claims] (1) The entire body is made of a fluid-impermeable Selantsk material, and is loaded on a flat plate A and a wave IFB and a single wave plate BO having a height of 311 in the following ψ loaded on the flat plate A. A heat exchanger characterized in that one end perpendicular to the wave and both sides of the home are sealed. ■ Corrugated plate Bffi and other 4 in the center of the inflow part B1 at one end of the corrugated plate B
The inflow part Bl and the outflow part Bs are curved upward to the height of the hometown mountain at the flat rkJ part and the one-crop part in the center, and curved to the lowness of the hometown valley on the other side m. and in aliil tj [h from the horizontal part of the entrance) jK
A corrugated sheet that has protruding peaks and downwardly protruding troughs. -) The heat exchanger according to claim 1, wherein the flat plates A and B are heat-resistant ceramics whose main components are 81 sN4 and/or SiC. (3) Either of paragraphs 1 and 1 of the claims section, which has a protrusion on the upper surface of the plane sK of the corrugated plate B that has a protrusion that is the same height as the home mountain and a lower surface that has a protrusion that is the same height as the home valley. Heat exchanger described in.