JPS6136667A - Evaporator for air-conditioning automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an improvement in an evaporator for automobile air conditioning.

[Background of the invention]

Prior to explaining the present invention, the internal structure of a conventional automobile air conditioning evaporator shown in Utility Model Publication No. 57-58540 will be explained based on FIGS. 5 to 7. FIG. 5 shows the overall structure. Line sectional view, Figure 6 is a BB sectional view of Figure 5,
FIG. 7 is a partially enlarged view of FIG. 6.

In FIGS. 5 to 7, 1 indicates an evaporator body, and 2 indicates an evaporator case. Insert the corrugated fin 1b into the parallel part of the tube 1a,
Both 1a and Ib are brazed.

Therefore, the evaporator main body 1 described above is shown in FIGS. 5 and 6.
As shown in the figure, when the evaporator body 1 is housed in the evaporator case 2, the meandering multi-hole tube that forms part of the evaporator body 1 is housed in the evaporator case 2. 18
The evaporator case 2 is housed in the evaporator case 2 with its bent portion vertically oriented.

The reason why the bent portion of the meandering multi-hole tube 1a is arranged vertically and housed in the evaporator case 2 is as follows. That is, if the bent portions of the meandering multi-hole pipe 1a are placed in the left-right direction and housed in the evaporator case 2, condensed water generated by cooling moisture in the air will flow through the meandering multi-hole pipe 1a. The above-mentioned condensation accumulates on the upper surface of 1a and freezes over time, and when this ice grows, a so-called freezing phenomenon occurs that obstructs the flow of air. It is necessary to arrange them vertically and accommodate them in the evaporator case 2.

The bottom 2a of the evaporator case 72 is provided with a condensed water receiver 3 having a concave cross section and a drain hole 4 connected to a drain hose (not shown) for the purpose of discharging condensed water dripping from above to the outside of the case 2. is provided, and the cross-sectional shape of the condensed water receiver 3 described above gradually increases in depth in the direction of the drain hole 4 so that the condensed water that has dripped into the condensed water receiver 3 can be quickly drained out of the case 2. Efforts have been made. Note that the condensed water receiver 3 having a concave cross section described above is not provided over the entire area of the evaporator case bottom 2a, but as shown in FIG.
The bottom part 2a of the case occupies the y half,
A meandering multi-hole tube 1a is placed in the other half.

In the above structure, the condensed water flowing down the lower end of the corrugated fin 1b indicated by reference numeral 1b' in FIG. 7 travels along the surface of the meandering multi-hole pipe 1a and reaches its bent lower end 18'. The condensed water that reaches the bent lower end 13' of the meandering multi-hole pipe 1a loses its destination here, so it becomes droplets and stays at the bent lower end 18', and the subsequent condensed water flows down. The size of the droplets gradually increases, and when they reach a certain size, they finally fall into the condensed water receiver 3 due to their weight and are discharged from the drain hole 4 to the outside of the evaporator case 2. Note that the series of flows of condensed water described above occurs when the air volume in the direction indicated by the arrow in FIG.
The condensed water that has reached 3' does not become droplets and drip onto the evaporator case 2, but instead is scattered by the air flow from the opening of the evaporator case 2, which is indicated by reference numeral 5 in FIG. If the amount of water droplets flying from the opening 5 is large, the water may fly from the foot outlet of the heater case (not shown) located near the evaporator case 2, or from the vent outlet located in front of the driver. There was a problem with water being thrown away.

[Purpose of the invention]

The present invention has been made to solve the problems of the prior art described above, and its purpose is to provide condensed water from the lower end of a serpentine multi-hole pipe that constitutes a part of the evaporator body. An object of the present invention is to provide an improved evaporator for automobile air conditioning that has a simple structure and can efficiently prevent water from flying into the air.

[Summary of the invention]

In order to achieve the above object, the present invention bends a multi-hole pipe in a serpentine shape, inserts a corrugate fin into the parallel part of the serpentine multi-hole pipe, and molds the two integrally. In an automobile air conditioning evaporator having a structure in which the bent part of the hole pipe is arranged vertically and housed in the evaporator case, the evaporator is located at the lower end of the bend of the meandering multi-hole pipe and attached to the bottom of the evaporator case. It is characterized in that the upper end of the pseudo water condensation inducing protrusion is provided.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 1 to 3. FIG. 1 is a longitudinal cross-sectional view showing the overall structure of an evaporator for automobile air conditioning according to the present invention, and FIG. A in Figure 1
-A sectional view, Figure 3 shows a partially enlarged view of Figure 2, and Figure 5 shows a partially enlarged view of Figure 2.
The same parts as those of the conventional automobile air conditioning evaporator shown in the figures through FIG. 7 are given the same reference numerals. 6 is a meandering multi-hole pipe 1
The lower end of the pseudo water condensation inducing protrusion 6 is located at the lower bent end 18' of the evaporator case 2.
a, and in the above embodiment,
The upper end of the pseudo water condensation inducing projection 6 is in contact with the bent lower end 13' of the meandering multi-hole pipe 1a.

In the above configuration, the condensed water flowing down the lower end of the corrugated fin 1b indicated by reference numeral 1b' in FIG. However, in the above embodiment, the upper end of the pseudo water condensation inducing projection 6 is in contact with the bent lower end 13' of the meandering multi-hole pipe 1a, and the lower end of the pseudo water condensation inducing projection 6 is connected to the bottom of the evaporator case 2. 28, as mentioned above, the condensate water that reaches the bent lower end 1a' of the meandering multi-hole pipe 1a will not change even if the condensate water is received using the pseudo condensate guide protrusion 6 as a guide. do not have.

In the above embodiment, the pseudo condensate guide projection 6 only needs to guide the condensed water that has reached the bent lower end 18' of the meandering multi-hole pipe 1a to the condensed water receiver 3, so its diameter may be small. Furthermore, the cross-sectional shape and number of the pseudo water condensation inducing protrusions 6 can be arbitrarily selected.

Further, in the above embodiment, the bottom part 2 of the evaporator case 2
Although the case is illustrated in which the upper end of the pseudo water condensation inducing projection 6 attached to a is brought into contact with the bent lower end 1 a of the meandering multi-hole pipe 1 a, the present invention is not limited to this. Instead, as shown in FIG. 4, a minute gap G is provided between the upper end of the pseudo water condensation inducing projection 6 and the bent lower end 18' of the meandering multi-hole tube 1a, and the bent lower end 1a of the meandering multi-hole tube 1a is The condensed water that has reached the point ' may be guided toward the pseudo condensed water inducing protrusion 6 by utilizing a bridging phenomenon.

Furthermore, as another embodiment of the present invention, the serpentine multi-hole pipe 1
The attracting effect of condensed water flowing down from the bent lower end 18' of a to the pseudo condensed water inducing projection 6 side may be promoted.

〔Effect of the invention〕

As detailed above, according to the present invention, the structure is simple and can efficiently prevent condensed water from flying out from the lower end of the bend of the meandering multi-hole pipe that constitutes a part of the evaporator body. An improved evaporator for automobile air conditioning can be obtained.

[Brief explanation of the drawing]

1 to 3 show an embodiment of an evaporator for automobile air conditioning according to the present invention, FIG. 1 is a longitudinal cross-sectional view showing the overall structure thereof, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. , FIG. 3 is a partial enlarged view of FIG. 2, FIG. 4 is an enlarged view of main parts showing another embodiment of the evaporator of the present invention, and FIG. 5 shows the overall configuration of a conventional evaporator for automobile air conditioning. A vertical sectional view, FIG. 6 is a BB sectional view of FIG. 5, and FIG. 7 is a partially enlarged view of FIG. 6. 1... Evaporator main body, 1a... Meandering multi-hole pipe, 13'
... Lower end of bent meandering hole tube, 1b... Corrugated fin, 1b'... Lower end of corrugated fin, 2...
Evaporator case, 2a...Evaporator case bottom, 3...
Condensed water receiver, 4th... also 1st figure 3rd figure 4th day, 5th figure 6th day

Claims (4)

[Claims] 1. A multi-hole pipe is bent in a serpentine shape, a corrugated fin is inserted into the parallel part of the serpentine multi-hole pipe, the two are integrally formed, and the bent part of the serpentine multi-hole pipe is arranged in the vertical direction. In an evaporator for automobile air conditioning constructed to be housed in an evaporator case, an upper end of a condensed water guiding protrusion attached to the bottom of the evaporator case is provided at the lower end of the bend of the meandering multi-hole pipe. An evaporator for automobile air conditioning characterized by: 2. An evaporator for automobile air conditioning according to the invention as set forth in claim 1, wherein the upper end of the pseudo water condensation inducing protrusion attached to the bottom of the evaporator case is brought into contact with the bent lower end of the meandering multi-hole pipe. 3. In the invention described in claim 1, there is provided an evaporator for automobile air conditioning in which a minute gap is provided between the upper end of the condensed water guiding protrusion attached to the bottom of the evaporator case and the bent lower end of the meandering multi-hole pipe. . 4. An evaporator for automobile air conditioning according to any one of claims 1 to 3, wherein the condensed water guiding protrusion attached to the bottom of the evaporator case is subjected to hydrophilic treatment.