SU1673825A1 - Heat exchanger - Google Patents

Abstract

The invention can be used in transport and energy technology, in particular in car radiators. The purpose of the invention is to intensify heat transfer. The heat exchanger consists of flat multichannel pipes 1 parallel to each other with transverse fins in the form of petals 2. The latter are made in one piece with pipes 1 and are located on opposite large sides of the pipes in straight lines parallel to the longitudinal axis of the pipes. The bases of the 3 petals 2 are located on each pipe 1 in the corridor order. The angle of inclination of the petals 2 to the larger side of the pipe 1 is unchanged within the same row. However, it changes monotonically when moving from row to row. On adjacent pipes of the 1st row with a minimum angle of inclination of the petals 2 are located on opposite edges. The first heat exchanging medium circulates through the internal cavities of the pipes 1 and exchanges heat with the second heat exchanging medium moving outside the pipes. 7 il.

Description

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The invention relates to tubular heat exchangers and can be used in transportation or power engineering, for example in automobile radiators.

The purpose of the invention is to intensify heat transfer and increase compactness.

Figure 1 shows the frontal view of the silver-plated flat body exchanger tubes; in Fig.2 - the same, top view: in Fig.Z - section A - A in Fig.2; figure 4 - section B - B in figure 2; figure 5 - section b - b in figure 2; on figb - cut G - G in figure 2; 7 - section D - D in FIG. one.

The heat exchanger consists of planar multichannel pipes 1 arranged parallel to one another with transverse fins in the form of petals 2, made in one piece with pipes 1 and located on opposite large sides of pipes 1 in straight lines parallel to the edges of the pipes, 3 petals 2 are located on each pipe 1 in the corridor order. The angle of inclination of the petals to the larger side of pipe 1 is unchanged within one row, however, it changes monotonically when going from row to row in a direction opposite to the direction of change in the slope of the petals of adjacent tubes.

The heat exchanger operates as follows.

The first heat exchanging medium circulates through the internal cavities of the pipes 1 and exchanges heat with the second heat exchanging medium moving the sleep /

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guns tubes 1. parallel to their large sides and large sides of the petals 2,

Execution of the petals 2 with a tilt angle variable from row to row allows to intensify the heat exchange near their surface, since the petals 2 that are previous along the external environment do not obscure the subsequent petals 2, which allows to obtain high heat transfer coefficients in their initial areas.

The opposite direction of change in the inclination of the petals 2 on the adjacent pipes 1 makes it possible to reduce the gaps between the tubes 1, which leads to an increase in the compactness of the apparatus. In addition, this arrangement of the petals leads to additional turbulence in the flow and intensification of heat transfer.

Claims (1)

Invention Formula A heat exchanger containing parallel, one another flat multichannel pipes with transverse fins in the form of petals inclined to the pipe surface placed on opposite large sides of the pipe in the corridor order in straight lines. parallel edges of the pipes, the petals within the same row are located with the same angle of inclination, different from the angle of inclination of the adjacent rows, which is different from the fact that, in order to intensify heat exchange and increase compactness, the angle of inclination of the petals one of its edges to the other in the opposite direction to the change in inclination of the petals of adjacent pipes. / Fyu.g Fig.Z MJ ™ vz / ZzZZZZ In-in FIG. five Fm4 L l Dd Fml