JPH0596792U - Heat exchanger - Google Patents

Abstract

(57) [Abstract] [Purpose] In a heat exchanger having pipes arranged in a puddle arrangement, the wake of the upstream pipe is divided to increase turbulence and improve the heat transfer performance of the wake pipe. [Structure] In a heat exchanger having pipes arranged in a puddle arrangement, pipes 5 ', 5 "located adjacently on the upstream side and the downstream side.
A turbulent flow accelerating body composed of at least one louver 9 or unevenness is provided on or near the center line 8 of the pipe 5'to increase the turbulence by dividing the wake of the upstream pipe 5 ', and to increase the turbulence. I tried to improve the heat transfer performance of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat exchanger such as an air conditioner.

[0002]

[Prior Art]

 As shown in FIG. 3 and FIG. 4, a louver 4 is provided on the fin 3 of the heat exchanger 2 used in the conventional air conditioner 1 to promote turbulent flow to thin or remove the temperature boundary layer. By doing so, the heat transfer characteristics are improved. In this case, the louvers 4 form rows in the direction transverse to the flow and are adjacent to the upstream pipes 5 ', 5'or the downstream pipes 5 arranged in the puddle arrangement, as shown in Figs. It is provided between the side pipes 5 ″ and 5 ″.

[0003]

[Problems to be solved by the device]

 The heat exchanger 2 used in the above-mentioned conventional air conditioner is often installed with an inclination with respect to the wall surface as shown in FIG. 3 in order to make it thinner, and its flow velocity distribution is uniform. There are few, and most of them have a biased flow (unbalanced flow). For this reason, particularly in the case of a puddle array pipe, the flow often flows in-line from the upstream pipe 5'to the downstream pipe 5 ". Fig. 3 shows a remarkable example of this. The tangential fan 6 has a unique recirculation vortex 7, and since the flow near the recirculation vortex 7 is fast, the divergence is large and the upstream pipe 5 ′ is shown. Has a large wake 10 and is located in the downstream pipe 5 ″, or the heat transfer area of the downstream pipe 5 ″ is reduced, and as a result, the heat transfer characteristics are deteriorated.

The present invention is intended to provide a heat exchanger capable of solving the above problems.

[0005]

Means for Solving the Problems The present invention relates to a heat exchanger having pipes arranged in a puddle arrangement, and comprising at least one louver or unevenness on or near the center lines of the pipes located on the upstream side and the downstream side. A turbulent flow promoting body is provided.

[0006]

[Action]

 According to the present invention, in the heat exchanger having the pipes arranged in the puddle arrangement, the turbulence promoting body provided between the pipes located adjacent to the upstream side and the downstream side divides the wake flow generated in the upstream pipe. It accelerates and enhances the turbulence, which restores and enhances the leading edge effect of the downstream pipe and improves its heat transfer performance.

[0007]

【Example】

 A first embodiment of the present invention will be described with reference to FIG.

The present embodiment relates to a heat exchanger used in an air conditioner like the conventional heat exchanger shown in FIGS. 3 and 4.

The fins 3 of the heat exchanger according to the present embodiment have rows of pipes 5 arranged in a puddle arrangement in rows extending in the direction transverse to the flow. Between adjacent pipes 5 ′, 5 ′ or 5 ″, 5 ″ on the downstream side of the pipe 5, a louver 4 is provided as in the conventional heat exchanger shown in FIGS. 3 and 4. It is provided.

At the center of the pipes 5 ′ and 5 ″ on the pipe center line 8 of the adjacent upstream pipes 5 ′ and downstream pipes 5 ″ arranged in the puddle arrangement, the same center line 8 There is provided one louver 9 as a turbulence promoting body arranged in a direction substantially orthogonal to the above.

In this embodiment, the louver 9 promotes the division of the wake generated in the upstream pipe 5'and enhances the turbulence of the wake. Therefore, the leading edge effect of the downstream side pipe 5 ″ can be recovered / enhanced, and its heat transfer performance can be improved.

A second embodiment of the present invention will be described with reference to FIG. In the first embodiment, one louver 9 is provided on the center line 8 of the upstream pipe 5'and the downstream pipe 5 ", which are arranged in a grid and are adjacent to each other. Two louvers 9a and 9b are provided near the center line 8 and are spaced apart from each other between the adjacent upstream pipe 5'and downstream pipe 5 ". ..

Also in this embodiment, the same operation and effect as those of the first embodiment can be obtained.

Although the louvers are provided in the first and second embodiments, an uneven turbulence promoting body such as fins having uneven surfaces may be provided instead of the louvers. It

[0015]

[Effect of the device]

 The present invention provides a turbulent flow accelerating body composed of at least one louver or unevenness on or near a pipe center line located adjacent to an upstream side and a downstream side in a heat exchanger having a pipe in a plover arrangement. As a result, the wake generated in the upstream pipe is divided by the turbulence promoter to increase turbulence, and the leading edge effect of the downstream pipe is restored and enhanced, and its heat transfer characteristics can be improved. ..

[Brief description of drawings]

FIG. 1 is a front view of fins of a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a front view of fins of a heat exchanger according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional air conditioner.

FIG. 4 is a front view of fins of the heat exchanger of the conventional air conditioner.

[Explanation of symbols]

 1 air conditioner 2 heat exchanger 3 fins 4 louver 5 pipe 5'upstream pipe 5 '' downstream pipe 6 tangential fan 7 recirculation vortex 8 pipe center line 9, 9a, 9b louver 10 wake

Claims (1)

[Scope of utility model registration request] 1. A turbulence promoting body comprising at least one louver or unevenness is provided on or near a pipe center line located adjacent to an upstream side and a downstream side in a heat exchanger having a puddle array pipe. A heat exchanger characterized by that.