JPH0531425Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an evaporator for an air conditioning heat exchanger.

[Prior art]

As an example of a corrugated fin type air conditioning heat exchanger, an air conditioning evaporator is formed by bending a flat aluminum multi-hole tube in a meandering manner, as shown in FIG. That is, a tube 1 made of an aluminum multi-hole tube is bent into a meandering shape, and corrugated fins 4 are interposed between each parallel surface of the tube 1. The curved portions 2 and 3 of the corrugated fin 4 and the outer surface of the tube 1 are fixed by brazing. As shown in the figure, this corrugated fin 4 is formed by cutting and raising a large number of louvers 5. As the refrigerant flows inside the tube 1, air is blown to the outer surfaces of the tube 1 and the corrugated fins 4, heat exchange is performed between the two, and the cooled air is blown out to the indoor side. It is.

[Problem to be solved]

However, in such an evaporator, condensed water 7 adheres to the outer surface of the tube and the outer surface of the fins due to heat exchange.
It flows downward. In such an evaporator,
Particularly in the case where the wave amplitude direction of the corrugated fin 4 is located in the vertical direction, the condensed water 7 is between the upper surface of the tube 1 and the lower end of the corrugated fin 4.
remains. Moreover, this condensed water 7 is
It forms a bridge between the lower end of the tree, grows larger, and stays there. Then, as more condensed water 7 accumulates, the air blowing resistance of the heat exchanger increases, impeding ventilation and reducing heat exchange. Furthermore, since the outer surface of the corrugated fins 4 is covered with condensed water 7 to a greater extent, heat transfer performance is also impaired from this point of view.

[Means for solving problems]

Therefore, in order to eliminate the above problems, the present invention adopts the following configuration.

That is, a corrugated fin 4 is interposed between the outer surfaces of the tubes 1 which face each other in parallel and through which the refrigerant flows, and the curved portion 2 of the corrugated fin 4,
3 and the contact portion is brazed and fixed. Then, the curved portion 2 is formed on the surface of the corrugated fin 4.
A large number of louvers 5 except for louvers 3 are cut and raised so that their cross sections are inclined or parallel to the base surface.
Here, the feature of the present invention is that the wave amplitude direction of the corrugated fin 4 is oriented in the direction of gravity, and the louver 5 located between the upper and lower curved parts 2 and 3 is formed to be biased upward. shall be.

Therefore, according to this air conditioning heat exchanger, the condensed water 7
Since there is no louver 5 in the lower part of the corrugated fin 4 where water tends to accumulate, the condensed water 7 will not form a bridge between the tube and the louver, improving ventilation and improving the heat dissipation effect. Become.

〔Example〕

Next, based on the drawings, we will explain the embodiments of the present invention.
explain.

Figure 1 shows the main parts of the heat exchanger of the present invention.
The figure is an overall schematic diagram thereof, and FIG. 3 is a schematic perspective view of essential parts of the corrugated fin 4.

In the heat exchanger of this embodiment, a tube 1 made of a multi-hole tube is bent into a meandering shape, and a corrugated fin 4 is disposed between the outer surfaces of the tube 1 that face each other in parallel. Then, the curved parts 2 and 3 located above and below the corrugated fin 4 are brought into contact with the outer surface of the tube 1, and the contact parts are fixed by brazing. Further, a louver 5 is cut and raised in this corrugated fin 4 as shown in FIGS. 1 and 3, and the entire louver 5 is arranged near the curved portion 2, and there is no louver near the lower curved portion 3. Further, in this heat exchanger, the plane of the tube 1 is located in the horizontal direction, and the wave amplitude direction of the corrugated fins 4 is located in the vertical direction. The refrigerant is circulated within the tube 1, and air is blown to the outer surface of the tube 1 and the outer surface of the corrugated fins 4. As a result, heat exchange takes place between the two, allowing cool air to be sent indoors. At this time, condensed water 7 condenses on the surfaces of the tubes 1 and fins 4, flows downward and remains there as shown in FIG.
In addition, since the louver 5 is located offset above the fin 4, the condensed water 7 does not reach the louver 5. Therefore, this condensed water 7 is smoothly removed by blowing air or the like.

It should be noted that the present invention is of course not limited to the above-mentioned embodiment, and for example, a so-called slit-type louver may be used instead of the slant-type louver 5 used in this embodiment. That is, the louver may be formed parallel to the base surface of the corrugated fin 4.

[Effect of idea]

The air conditioning heat exchanger of the present invention has the above configuration and has the following effects.

The air conditioning heat exchanger of the present invention is a so-called corrugated fin type heat exchanger, in which the wave amplitude direction of the corrugated fins 4 is directed in the direction of gravity, and the louvers are located between the upper and lower curved parts 2 and 3 of the fins. 5 is biased upward, it is possible to prevent condensed water 7 remaining on the tube surface from bridging onto the louver 5. Thereby, the pressure loss on the air side can be reduced, good ventilation can be maintained, and the heat transfer effect can be improved. Further, since the fin portion covered with condensed water 7 is reduced, heat transfer between the refrigerant and air is improved from this point as well.

[Brief explanation of the drawing]

Figure 1 shows the main parts of the heat exchanger of the present invention.
The figure is an overall schematic diagram thereof, FIG. 3 is a schematic perspective view of a main part showing an example of corrugated fins 4 used in this heat exchanger, and FIG. 4 is an explanatory diagram showing main parts of a conventional heat exchanger. 1...tube, 2...curved part, 3...curved part, 4...corrugated fin, 5...louver,
6... Hetsuda, 7... Condensed water.

Claims (1)

[Scope of utility model registration request] A corrugated fin in which a flat tube 1 through which a refrigerant flows, and curved portions 2 and 3 are interposed in contact with each other between the outer surfaces of the tube 1 facing parallel to each other, and the contact portions are fixed by brazing. 4 and
In an air-conditioning heat exchanger comprising a large number of louvers 5 cut and raised on the surface of the fins 4 except for the curved portions, and having an inclined cross section or parallel to the base surface, the corrugated fins 4 have waves. An air conditioning heat exchanger characterized in that the amplitude direction of the louver is directed toward the direction of gravity, and the louver 5 located between the upper and lower curved portions 2 and 3 is biased upward.