JP3282060B2 - Heat exchanger for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a heat exchanger for an air conditioner.

[0002]

2. Description of the Related Art Generally, in an air conditioner, as shown in FIG. 4, a plurality of fins 1... 1 exchange heat in common with a fin group 1A arranged in parallel at a fixed interval. There is used a heat exchanger having a structure in which a pipe 3 constituting a coil is inserted, and a frame 3 for surrounding and protecting the fin group 1A is provided.

In the cooling operation, when the indoor air passes through the gap between the fin groups 1A cooled by the driving of the fan, heat is exchanged to produce cool air. At this time, moisture contained in the indoor air is condensed on the surface of the fin group 1A due to a decrease in temperature, and the water droplets fall along the surface of the fin group and fall by their own weight, and are received by the lower frame 31 of the frame 3 and drained The water drops from the hole 32 onto the drain pan 4 laid under the heat exchanger and is discharged. During the cooling operation, most of the water on the lower frame 31 is discharged from the air passing through the gap of the fin group 1A. It is blown toward the discharge port side by the wind pressure, falls from the end of the lower frame 31 onto the drain pan 4, and is discharged.

When the water on the lower frame is blown to the outlet side, the lowermost pipe 2 on the discharge port side of the conditioned air and the lower frame 31
When there is enough space between the lower frame 3 without any resistance
1 falls onto the drain pan 4 and is discharged,
When the interval is narrow, the lowermost pipe 2 acts as a weir to collect water, and the water that passes over the pipe 2 and spills to the discharge port side is scattered as water droplets due to wind pressure, and equipment and ducts To get wet and cause water leakage accidents.
Conventionally, measures have been taken to reduce the wind speed or increase the width of the drain pan.

[0005] In the former case, there is a problem that the air processing capacity and the heat exchange capacity are reduced due to a decrease in the air volume, and in the latter case, there is a problem that the space for installing the heat exchanger is widened.

In order to increase the air processing capacity and heat exchange capacity without increasing the installation space, a method of shortening the fin width instead of changing the width of the drain pan may be considered. However, in order to prevent scattering, the fin width is reduced. Need to be quite short,
The reduction of the heat exchange efficiency due to the reduction of the heat exchange area was larger than the increase of the air treatment capacity and the heat exchange capacity due to the increase in the air volume, and the operation could not be performed.

[0007]

The object of the present invention is to provide a sufficient space between the lowermost pipe near the discharge port side and the lower frame of the frame,
An object of the present invention is to solve the above-mentioned problem by forming cut-and-raised pieces for catching water droplets on a plurality of fins constituting a fin group.

[0008]

DISCLOSURE OF THE INVENTION A heat exchanger for an air conditioner according to the present invention comprises:
A heat exchange for an air conditioner in which a plurality of fins are arranged in parallel at regular intervals and a pipe constituting a heat exchange coil is inserted in common to a fin group, and a frame is provided to surround and protect the fin group. in vessels, regulating two rows from the <br/> both discharge port side nearest row of pipes provided the spacing between the last discharge port side of the sum air and the lowermost end of the pipe near said frame bottom frame of The lowest point of the eye
On the downwind side of the fins of the pipe off the cut and raised surface
A plurality of cut-and-raised pieces that are parallel to the inner surface and open on the upstream side and the downstream side are formed in a plurality of places in the vertical direction.

[0009]

According to the present invention, even if dew condensation water dropped on the lower frame is blown toward the outlet by wind pressure, there is a sufficient space between the lowermost pipe closest to the discharge port side and the lower frame so that water does not accumulate. ,
Water droplets that attempt to fly over the second row of pipes from the pipe in the row closest to the outlet side are captured by the cut and raised pieces of the fins.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the heat exchanger of the present invention will be specifically described with reference to the drawings. FIG. 1 is a front view of the heat exchanger of the present invention, and FIG.
FIG. 3 is a central vertical sectional side view of FIG. 1, and FIG. 3 is an enlarged cross-sectional plan view taken along line AA of FIG. Numeral 1 is a fin for heat exchange, and a plurality of fins 1... 1 are arranged in parallel at regular intervals to constitute a fin group 1A. Reference numeral 2 denotes a pipe constituting a heat exchange coil, which is commonly inserted through the fin group 1A, and at least a lowermost pipe 2 closest to the air outlet side has a gap with a lower frame of a frame body described later. It is arranged to be Hcm. This interval H was optimally set to 2 cm or more as a result of the experiment. Reference numeral 3 denotes a frame body for protecting the fin group 1A, and the lower frame 31 of the frame body is used for cooling.
It acts to receive water drops dripping from the surface, and drops water on the lower frame 31 from a drain hole or a drain groove 32 formed at the center of the lower frame 31 to a drain pan 4 laid under the heat exchanger. Let drain. 11 ... 11 catch water droplets formed on the leeward side of the pipe at the lowermost end of the second row from the row closest to the outlet side (at the rear position where the air entering through the gap between the fin groups has passed through the pipe). The fins are formed by punching and cutting each fin with a U-shaped blade, and the width thereof is optimally approximately half the fin interval.

During the cooling operation, the indoor air entering the arrow direction from the inlet side of the fin group 1A by the drive of the fan is exchanged with heat when passing through the clearance of the cooled fin group 1A and is gradually cooled. At this time, moisture contained in the indoor air is condensed on both sides of the fins 1 constituting the fin group 1A due to a decrease in temperature, and the water droplets usually fall on both sides of the fins and fall by their own weights. Drain hole 3
2 falls onto the drain pan 4 and is discharged. However, since wind pressure is applied from a direction perpendicular to the direction in which the water droplets fall, the water droplets are blown toward the outlet side, and the water that has fallen on the lower frame 31 is also discharged. It is blown to the outlet side by wind pressure.

When the distance between the lowermost pipe near the discharge port side and the lower frame 31 is increased, the lowermost pipe in the second row and the lower frame 31 The water between the lowermost pipe in the second row and the lowermost pipe on the windward side, and water that tends to escape over the lowermost pipe in the second row and drift downwindward Are scattered as water droplets due to wind pressure, but the water droplets are caught by the cut and raised pieces 11 ... 11 of the fins 1 ... 1 and fall on the lower frame 31, and the heat exchanger It falls on the drain pan 4 laid below and is drained.

The water collected on the lower frame 3 in this manner is removed by the action of the cut-and-raised pieces 11 of the fins 1.
Water droplets are not scattered from the end of the air, that is, the discharge port of the conditioned air.

[0014]

According to the air conditioner heat exchanger according to the present invention, provided with a gap between the lower frame of the pipe and the frame of the lowermost end of the discharge port side nearest harmony air ejection In the fins on the leeward side of the lowermost pipe in the second row from the pipe in the row closest to the outlet side , the cut and raised surface is parallel to the fin surface and upstream
Since a plurality of cut-and-raised pieces that are open at the downstream side are formed in the vertical direction, even if the speed of the air to be processed, that is, the wind speed is increased, water droplets do not scatter from the discharge port. As a heat exchanger having a function of preventing water droplets from scattering, the heat exchanger itself can be made compact.

[Brief description of the drawings]

FIG. 1 is a front view of the heat exchanger of the present invention.

FIG. 2 is a central longitudinal sectional side view of the heat exchanger of the present invention.

FIG. 3 is an enlarged cross-sectional plan view taken along line AA of FIG. 2;

FIG. 4 is a central longitudinal side view of a conventionally known heat exchanger.

[Explanation of symbols]

 Reference Signs List 1 fin 11 cut and raised piece 1A fin group 2 pipe 3 frame 31 lower frame 4 drain pan

Continuation of the front page (56) References JP-A 1-60121 (JP, U) JP-A 53-47654 (JP, U) JP-A 51-112949 (JP, U) JP-A 61-46218 (JP , U) Actually open sho 59-65319 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00 F24F 13/30 F25B 39/02

Claims (1)

(57) [Claims] An air provided with a frame for inserting a pipe constituting a heat exchange coil in common with a group of fins in which a plurality of fins are arranged in parallel at regular intervals and surrounding and protecting the group of fins. in conditioner heat exchanger, between between the lower frame and the lowermost end of the pipe discharge port side nearest harmonization air in the frame
In addition to providing a gap, the fins on the leeward side of the lowermost pipe in the second row from the pipe in the row closest to the discharge port side
Surface is parallel to the fin surface and the upstream and downstream sides are open.
A heat exchanger for an air conditioner, wherein a plurality of cut and raised pieces are formed in a vertical direction.