JPH04155181A - Parallel flow type heat exchanger - Google Patents

Abstract

PURPOSE:To permit the provision of a heat exchanging capacity, big compared with the height of a heat exchanger, by a method wherein cooling pipes and cooling fins are bent when they are seen from the side surface side of the heat exchanger. CONSTITUTION:In the indoor unit of a ceiling embedded type air-conditioning machine, parallel flow type heat exchangers 11a, 11b are bent and, therefore, the height of the heat exchangers can be lowered and, as a result, the total height of the indoor unit can be reduced while the height of a space above the ceiling can be lowered and an indoor space can be enlarged. On the other hand, the parallel flow type heat exchangers 11a, 11b are employed in a condition that they are superposed in left-and-right direction and one heat exchanger 11a is used for dehumidifying while the other heat exchanger 11b is used for cooling whereby the cooling capacity of the heat exchangers can be improved. A space 12 between both of the heat exchangers 11a, 11b is constituted as a plenum chamber for eliminating the variability of air temprature.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat exchanger that can be downsized while maintaining heat exchange ability, and in particular, to a heat exchanger suitable for use in air conditioners. It is related to vessels.

[Prior Art] FIG. 4 is a schematic cross-sectional view of an indoor unit of a conventional separate ceiling-embedded air conditioner. This indoor unit/
In case 1, indoor air is sucked in from the lower suction port 3 by the rotation of the blower 2, and blown out from the blower outlet 4 into the heat exchanger chamber 5. It is dehumidified and cooled through the heat exchanger 6 (during cooling).

Alternatively, the air is heated (during heating) and supplied into the room from the lower air outlet 8 attached to the air outlet grille 7.

Reference numeral 9 denotes a soup saucer that moves dehumidified water to the drain during cooling.

[Problem B to be solved by the invention] The heat exchanger 6 as described above is usually flat as shown in the figure, and has a ventilation area proportional to its height H, so it is necessary to increase the heat exchange capacity. In this case, the height H becomes large, and there is a limit to increasing the heat exchange capacity when trying to accommodate it in a limited space under the ceiling like the above-mentioned ceiling-embedded air conditioner. Particularly in recent years, the volume of the attic space has tended to be narrowed in order to increase indoor space, and there is an urgent need to develop a heat exchanger with a small height H and a large heat exchange capacity.

The above problems are not limited to ceiling-mounted air conditioners, but also other air conditioners, and even 5-piece radiators.

This is a problem that should be solved equally for oil coolers and other heat exchangers.

Accordingly, one object of the present invention is to provide a heat exchanger that can have a large heat exchange capacity relative to its height.

[Means to solve the problem]

In order to achieve the above object, the present invention connects a pair of parallel header pipes through a plurality of cooling pipes perpendicular to the above and seven pipes, and connects the cooling pipes with cooling fins in a heat conductive manner. The parallel flow heat exchanger is characterized in that the cooling pipes and cooling fins are curved when viewed from the side of the heat exchanger.

[Function] Since the present invention is configured as described above, compared to a conventional parallel flow heat exchanger configured in a flat plate shape, when the ventilation area is the same, the curve of one ventilation surface is reduced. Its height can be reduced.

On the other hand, if the height is the same, a large ventilation area can be secured, and the heat exchange capacity can be increased compared to a conventional flat parallel flow heat exchanger.

〔Example〕

Next, with reference to FIGS. 11EI to 3 and 5, 1
Two embodiments embodying the present invention will be explained to provide an understanding of the present invention.

Here, FIG. 1 is a perspective view of a parallel flow type heat exchanger according to an embodiment of the present invention, and FIGS. 2(a) and (b) are respective parallel flow type heat exchangers according to an embodiment of the present invention. FIG. 3 is a schematic side view of the device, and FIG. 3 is a schematic cross-sectional view of the parallel flow heat exchanger shown in FIG. 1 applied to a ceiling-mounted air conditioner.

Moreover, FIG. 5 is a perspective view of a conventional flat parallel flow type heat exchanger.

Note that the following examples relate to specific examples in which the heat exchanger according to the present invention is applied to a ceiling-mounted air conditioner; however, the scope of application of the present invention is not limited to the above-mentioned air conditioners, but also other air conditioners, and Needless to say, the present invention can also be applied to dehumidifiers, refrigerators, simple air conditioners, automobile radiators, oil coolers, and the like.

Figure 5 shows a conventional parallel flow heat exchanger.

A pair of parallel header pipes H1, Hz are connected to the above-mentioned header pipes H, , H, through a plurality of cooling pipes P perpendicular to each other, and heat is transferred between the cooling pipes P, P, . . . through a large number of cooling fins F. It consists of a structure that is connected to each other. In addition, S goes above, Dapaibu H,,H! Together with the heat exchanger, it is a side member that constitutes the outer frame of the heat exchanger.

In contrast to the conventional parallel flow heat exchanger lO as described above, the parallel flow heat exchanger according to the present invention has the above-mentioned characteristics when viewed from the side of the heat exchanger, as shown in FIG. 1 or 2. The difference is that the cooling pipe P and cooling fins F have a curved structure,
Others are the same. The example shown in FIG. 2(a) is a side view of the parallel flow heat exchanger 11 shown in FIG.
) is a side view of a parallel flow heat exchanger curved into a roughly S-shape.

In such a parallel flow heat exchanger with a curved ventilation surface,
Compared to the conventional flat parallel flow type heat exchanger 11 shown in FIG. 5, the height can be reduced by the amount of the above-mentioned curvature if the ventilation area is the same.

FIG. 3 shows an example in which two heat exchangers according to the present invention as shown in FIG. 2(a) are applied to an indoor unit of a ceiling-mounted air conditioner. In the indoor unit according to the embodiment, 1 parallel flow heat exchanger 11. and 11. Since it is curved, its height can be reduced, and as a result, the total height of the indoor unit can be reduced, and the height of the ceiling can be lowered, so it has the advantage that it can take up a large amount of indoor space. In addition, in the illustrated example, the parallel flow heat exchanger 1
Since heat exchangers 11. for dehumidification.

Also, the other heat exchanger 11. By using it for cooling, it is possible to improve the cooling capacity. In addition, the reheat exchanger 11. A space 12 between the air conditioners and llb is configured as a plenum chamber to eliminate variations in air temperature. In addition, when the parallel flow type heat exchanger according to the present invention shown in FIG. It reaches the header pipe H1 at the top. During this time, heat exchange occurs between the fins F thermally connected to the cooling pipe P and the air passing through them.

The heat-exchanged refrigerant is gasified, flows out from the outlet of the upper header pipe H1 as shown by arrow 14, and returns to the compressor. Note that the broken line arrow indicates the direction of the refrigerant flowing during heating.

〔Effect of the invention〕

Since the present invention is configured as described above, when the height is kept the same, the effective ventilation area can be increased and the cooling capacity can be increased compared to the conventional flat parallel flow type heat exchanger. improves. Also, if the 5 ventilation areas are made the same, the front height can be reduced.

Suitable for housing in a narrow space such as an attic.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a parallel flow heat exchanger according to an embodiment of the present invention, and FIGS. 2(a) and (b) are schematic diagrams of parallel flow heat exchangers according to an embodiment of the present invention, respectively. Side view. Figure 3 is a schematic cross-sectional view of the parallel flow heat exchanger shown in Figure 1 applied to a ceiling-mounted air conditioner, and Figure 4 is a schematic cross-section showing an indoor unit of a conventional ceiling-mounted air conditioner. FIG. 5 is a perspective view of a conventional flat parallel flow type heat exchanger. [Explanation of symbols] 1 (+, Hz...Header pipe P...Cooling pipe S...Side member 11.11..11k...Parallel flow heat exchanger H, h...
・Height

Claims (1)

[Claims] (1) In a parallel flow heat exchanger in which a pair of parallel header pipes are communicated with each other through a plurality of cooling pipes perpendicular to the header pipes, and the cooling pipes are thermally connected to each other by cooling fins, the cooling A parallel flow heat exchanger characterized in that the tubes and cooling fins are curved when viewed from the side of the heat exchanger.