JPS609594Y2 - heat exchange tube - Google Patents

Description

[Detailed description of the invention] The present invention relates to a heat exchange tube, and more specifically, the present invention relates to a heat exchange tube, and more specifically, a plurality of synthetic leather resin helical blades with different helical pitches are inserted to prevent a steady flow from occurring. The present invention relates to a heat exchange tube that can be constantly stirred to improve heat exchange efficiency by increasing the contact efficiency with the inner wall of the tube.

In order to improve the heat dissipation or heat generation effect of a heat exchanger such as a radiator or air conditioning equipment, a turbulent element with a fluid stirring effect is inserted into the pipe line.

The turbulator is usually made of metal, such as a ribbon-shaped metal plate twisted into a spiral shape, or a synthetic resin having a spiral blade shape.

The purpose of inserting a turbulator into a pipe is to disturb and stir the flow of the refrigerant fluid flowing through the pipe, thereby increasing the contact efficiency of the fluid with the pipe wall and improving the heat exchange efficiency. .

Furthermore, in this case, it is required to improve the efficiency of the entire heat exchanger by minimizing the pressure loss of the fluid due to resistance from the turbulent flow elements.

However, in conventional heat exchange pipes, one or more of the above-mentioned turbulators are inserted into the pipe, but even in the case where multiple turbulators are inserted, all of them are spiral vane turbulators of the same shape. In the beginning, the fluid flow is disturbed and a predetermined heat exchange efficiency can be obtained, but gradually the fluid flow moves in the direction along the spiral blades and becomes a steady flow, the stirring effect weakens and the heat exchange efficiency increases accordingly. There is a drawback that efficiency deteriorates.

The present invention was developed in view of the above-mentioned difficulties, and its purpose is to use a spiral blade-shaped turbulent flow element with relatively little fluid flow resistance, and to constantly stir the fluid without creating a steady flow. , to provide a heat exchange tube that can improve heat exchange efficiency by increasing the contact efficiency with the inner wall of the tube.The feature is that a plurality of synthetic leather resin fibers with different helical pitches are used in the tube. This is where the spiral blade prone Ryuko is inserted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show a turbulator 10 made of synthetic resin.

The turbulator 10 shown in FIG. 1 is formed to have two spiral blades.

The one shown in FIG. 2 is also a turbulent having two spiral blades, but the pitch of the spiral is set to be larger than that shown in FIG. 1.

Note that the conditions for spiral turbulence are not particularly limited.

FIG. 3 shows an embodiment of the heat exchange tube 12 according to the present invention,
1 and 2 in the 14 pipes through which fluid such as refrigerant flows.
Turbulence elements 10a and 10b shown in the figure.

In other words, turbulents with different spiral pitches are inserted in a mixed manner.

The number of turbulence elements to be inserted is not particularly limited as long as it is a plurality.

However, in this embodiment, the turbulator 1 with a small pitch
Since the fluid flowing along the spiral blade 0b has a long creepage distance, its flow velocity is greater than that of the fluid flowing along the spiral blade of the turbulent flow element 10a, which has a large pitch. The agitating action of 12 occurs continuously, so that a steady flow of the fluid as a whole does not occur, and the fluid comes into contact with the inner walls of the pipes 12 alternately, increasing the heat exchange efficiency.

Note that spiral blades with a larger pitch have less fluid resistance, so the increase in flow velocity due to this must be taken into consideration.
Needless to say, a pitch ratio that produces a stirring action must be selected.

Furthermore, the fluid resistance varies depending on the type of fluid, the roughness of the surface of the turbulent, etc., and it is necessary to select the optimum pitch ratio in consideration of these factors.

FIG. 4 shows another embodiment.

In this embodiment as well, the turbulent flow element I inserted into the pipe 14
QC? The turbulators 10d are set to have different spiral pitches, and the turbulator 10d has a larger spiral diameter than the turbulator 10c.

In this embodiment as well, the difference in pitch between the turbulators 10c and 10d produces the same fluid agitation effect as described above, and the velocity of the fluid flowing along the spiral blade of the turbulator 10d, which has a large diameter, is Since it is larger than that of the fluid flowing along the spiral blade of the turbulent flow element 10c, which has a small diameter, the mixing effect due to the difference in flow velocity is also added, resulting in a more complex fluid flow and a further stirring effect, which improves the heat exchange efficiency. can be increased.

FIG. 5 shows yet another embodiment.

In this embodiment as well, the turbulator 10 inserted into the pipe 14
e.

In 10f, the pitch is different and the direction of the spiral is reversed.

However, in this embodiment as well, the above-mentioned effect is produced due to the difference in pitch, and since the directions of the spirals are opposite to each other, a further mixing effect is produced due to this.

Also in this embodiment, the turbulent element lee and the turbulent element 1 are further added.
The diameter of the 0f spiral may be changed.

Note that in the second and third embodiments as well, it is preferable to set the diameter of the turbulent, etc., taking fluid resistance into consideration.

As described above, according to the present invention, since a plurality of turbulators with different spiral pitches are mixed and inserted into the conduit, the fluid flowing along each turbulent has a different flow rate, so that the flow continues. A stirring action occurs, which has the remarkable effect of increasing heat exchange efficiency.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of drawings]

FIGS. 1 and 2 are perspective views showing the shape of the turbulator. 3 to 5 are longitudinal cross-sectional views showing preferred embodiments of the heat exchange tube. 10 = 10a, 10b, 10c, 10d, 10e,
10f...Turbulent, 12...Heat exchange tube, 14...Tube.

Claims (1)

[Scope of utility model registration request] A heat exchange tube made by inserting a mixture of multiple resin spiral blade-like turbulators with different spiral pitches.