JPH0473078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a turbulence promoter that is inserted into a fluid conduit constituting a heat exchanger such as an oil cooler or heater core to create a turbulent flow effect in a fluid. It is.

Structure of the conventional example and its problems As shown in Fig. 7, the turbulence promoting body used in the conventional heat exchanger has slits formed at predetermined intervals in the center of the strip plate in parallel with the longitudinal direction. A pair of wave-shaped parts 10 and 10' are formed, and this wave-shaped part 1
0 and 10' are connected by a connecting part 11, and are formed so that the top part 10a of one of the adjacent wave-shaped parts 10 is located at the position of the bottom part 10'b of the other wave-shaped part 10'. Moreover, the bottom part 10 of one wave-shaped part 10
The top portion 10'a of the other wave-shaped portion 10' is located at b. And this turbulence promoter A
As shown in FIG.
This generates turbulence in the fluid and improves the performance of the heat exchanger.

This turbulence promoting body A is inserted into the fluid passage pipe B as shown in FIG. 9 and causes turbulence in the fluid, but the turbulent flow effect is large in portions D located above and below the turbulence promoting body A. In comparison, in the E section located on the left and right sides of the turbulence promoter A, the flow rate of the fluid is small, so the turbulence effect is small, and the turbulence effect in the fluid conduction pipe is not uniform, resulting in a decrease in heat exchange capacity. There were flaws.

Purpose of the Invention Therefore, the present invention aims to increase the turbulent flow effect in the fluid conduit by reducing the unturbulent area existing in the fluid conduit and causing fluid turbulence over a wide area. The purpose is to increase exchange capacity.

Structure of the Invention In order to achieve this object, the present invention provides an inclination in the transverse direction of the strip plate to the wave-shaped portion that gives a turbulent flow effect to the fluid, thereby reducing the proportion of the unturbuled area and causing turbulent flow in the fluid conducting pipe. By increasing the effectiveness, the heat exchange capacity is increased without increasing the pressure loss inside the pipe.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figures 1a, b, and c are perspective views of the turbulence promoter 1;
The turbulence promoter 1 is formed by pressing a strip plate of an appropriate length, and a pair of corrugated portions 2, 2' parallel to the longitudinal direction are connected in a flat manner. They are connected via part 3. The adjacent wave-shaped parts 2 and 2' of this turbulence promoting body 1 are located at the position of the top 2a (or bottom 2b) of one wave-shaped part 2 and the bottom 2'b (or top 2) of the other wave-shaped part 2'. 'a) are bulged in opposite directions, and in order to enhance the turbulence effect on the left and right sides of the turbulence promoting body 1, the wave-shaped parts 2 and 2' are formed by shortening the strip plate. It is sloped towards the hand.

That is, as shown in FIG. 2, the waveform portion 2 is
The width of the strip is adjusted so that the amplitude T (distance between the top 2a and the bottom 2b) of the longitudinal central portion of the strip (the side adjacent to the other wave-shaped portion 2') is larger than the amplitude t of the outer portion. It is inclined in the direction. In addition, the second
In the figure, only one wave-shaped portion 2 is shown, but the other wave-shaped portion 2' is also formed in the same manner.

FIG. 3 shows an oil cooler using the above-mentioned turbulence promoter 1, which includes a large number of fluid conduction pipes 4 having U-shaped curved portions 4a, and headers 5 that connect the open ends of the fluid conduction pipes 4, respectively. , fluid conduction pipe 4
The turbulence promoting body 1 is inserted into a straight pipe portion of the fluid conducting pipe 4 excluding the curved portion 4a.

That is, the turbulence promoting body 1 has the wave-shaped parts 2, 2' constituting the turbulent flow forming part inclined with respect to the flat connecting part 3, thereby changing the unturbuled region from the shaded part E in FIG. 9 to the shape shown in FIG. As shown in FIGS. 6a and 6b, the turbulence promoting body H of the present invention reduces the heat inside the pipe of the fluid to the shaded area L to enhance the turbulent flow effect inside the fluid conducting pipe. Increase the transfer rate by 40-50% and ultimately increase the heat exchange capacity without increasing the pressure drop in the pipe
Improve by 15-20%. In addition, in Fig. 6, A
indicates a conventional turbulence promoter, and H indicates a turbulence promoter of the present invention.

Effects of the Invention As is clear from the above description, the present invention provides a wave-shaped portion that forms turbulent flow of a turbulence promoting body inserted into a fluid passage pipe of a heat exchanger, so that the central portion side is larger than the outer portion. By tilting the strip plate in the transverse direction to increase its amplitude, the proportion of the unturbulent area is reduced and the turbulent flow effect in the fluid conducting pipe is increased, and the fluid inside the pipe is heated without increasing the pressure loss inside the pipe. It has the advantage of improving the transfer rate and heat exchange capacity.

[Brief explanation of the drawing]

Figures 1a, b, and c are a perspective view, a front view, and a plan view showing a turbulence promoter according to an embodiment of the present invention, and Figure 2 is an explanation showing the configuration of a wave-shaped portion of the turbulence promoter. figure,
Fig. 3 is a perspective view of an oil cooler using the same turbulence promoter, Fig. 4 is a schematic sectional view of the turbulence promoter inserted into the fluid passage pipe of the oil cooler, and Fig. 5
The figure is a sectional view taken along line K-K' in Figure 4, and Figure 6 is a diagram showing the heat exchange performance when a turbulence promoting body is inserted into the fluid conduction pipe of the same oil cooler, where a is the heat transfer coefficient inside the pipe. , b indicates heat exchange capacity. Fig. 7 is a perspective view showing a conventional turbulence promoter, Fig. 8 is a schematic cross-sectional view when the turbulence promoter is inserted into a fluid conduction pipe, and Fig. 9 is a cross section taken along line C-C' in Fig. 8. It is a diagram. 1... Turbulence promoter, 2, 2'... Wave shaped part, 2
a, 2'a...top, 2b, 2'b...bottom, 3...
...Connection part.

Claims (1)

[Claims] 1 A pair of corrugated portions are formed parallel to the longitudinal direction of the strip plate, the pair of corrugated portions are connected by a connecting portion, and the top of one of the adjacent corrugated portions is connected to the top of the other corrugated portion. Form it so that the bottom is located,
Furthermore, the turbulence promoter for a heat exchanger is characterized in that the wave-shaped portion has an inclination in the transverse direction of the strip so that the amplitude is larger in the longitudinal center portion of the strip than in the outer portion.