JP3066628B2 - 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 heat exchange coil is formed in common with a fin group 1A in which a plurality of fins 1... Pan 3 which receives a water drop dropped from the surface of the fin group during cooling to the lower end side of the fin group 1A
Is used.

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, the 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, are received by the drain pan 3 and discharged from the drain hole 31. However, if the wind speed is faster than the falling speed of the water droplets, the water droplets will scatter from the outlet of the conditioned air due to the wind pressure, wet the equipment and ducts, and cause a water leak accident,
Conventionally, the wind speed has been reduced to prevent scattering, or the width of the drain pan has been increased so as to receive scattered water droplets.

[0004]

In each of the above prior arts,
The following problems arise. 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.
In the latter case, there is a problem that a space for installing the heat exchanger is widened.

[0005] In order to increase the air processing capacity and heat exchange capacity without increasing the installation space, it is conceivable to reduce the fin width instead of keeping the width of the drain pan unchanged. Need to be quite short,
The decrease in heat exchange efficiency due to the decrease in the heat exchange area was larger than the increase in the air treatment capacity and the heat exchange ability due to the increase in the air volume, and the implementation was not possible.

[0006]

An object of the present invention is to solve the above-mentioned problems by forming ribs and slits serving as weirs for water droplets on fins constituting a fin group.

[0007]

Means for Solving the Problems To achieve the above object,
Therefore, the present invention provides a heat exchanger for an air conditioner configured as follows.
It was done. That is, by inserting the pipe in which a plurality of fins constituting the heat exchanger coil in common fin group arranged in parallel at a predetermined interval, the lower end of the fin group, from the surface of the fin group in cooling in the heat exchanger for an air conditioner provided with a drain pan for receiving water drops dripping, the
Of the fins where the pipe is not inserted
At predetermined intervals, a plurality of V-shaped ribs in cross-section
Open and protrude and adjoin each other in the room air flow direction.
The ribs in the opposite direction so that they are more windward than the above ribs.
A slit hole is formed in the fin on the side .

[0008]

The water droplets condensed on both sides of the fins constituting the fin group tend to move to the leeward side due to the wind pressure, but are blocked by the ribs, collected in the slit holes located in front of the ribs, and stored in the slit holes. And fall down on the drain pan, and water droplets do not scatter from the exit side end of the fin group.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
3 will be described with reference to FIG. FIG. 1 is a front view of the heat exchanger of the present invention, FIG. 2 is a side view of the longitudinal section at the center 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. 2 is
A pipe constituting a heat exchange coil, which is commonly inserted into the fin group 1A. Reference numeral 3 denotes a drain pan for receiving water droplets dropped from the surface of the fin group 1A during cooling, and a drain hole (or drain groove) 31 is formed in a valley of a hull-shaped bottom plate. 11 ... 11, the pipe 2 of the fin 1 is not inserted
A rib serving as a weir for water droplets formed over the entire length in the vertical direction on the lee side of the vertical row of pipes (at the rear position where air entering through the gap between the fins passed through the pipe), and one side is It is a ridge 11a, and the opposite side is a concave groove 11b.
It has become. 12 ... 12 are the plurality of ribs 11 ... 1
1 is a slit hole formed at the front position, that is, on the windward side.

The rib 11 is formed by bending with a V-shaped blade, and the second rib has a direction opposite to that of the first rib, that is, a direction in which the ridge 11a and the groove 11b are formed. The next ribs are alternately formed so as to be reversed, and the slit holes 12 are formed in a continuous state or a discontinuous state by a punching process except for upper and lower connecting portions.

During the cooling operation, the indoor air entering from the inlet side of the fin group 1A by the driving 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, the moisture contained in the indoor air is condensed on both sides of the fins 1 constituting the fin group 1A due to the temperature drop, and the water drops usually fall on the both sides of the fins under their own weight, and are received by the drain pan 3 and drained. Although the water droplets are discharged from the holes 31, the water droplets are blown toward the first rib 11 on the leeward side because the wind pressure is applied from a direction perpendicular to the falling direction of the water droplets.

On one side of the rib 11 where the ridge 11a appears, water drops are blocked by the ridge 11a, enter the slit hole 12 located at the front position, flow downward through the slit hole 12, and flow downward. It falls on the drain pan 3 from the lower end. Since the ribs on the opposite surfaces of the fins has a recessed groove 11b, but the water droplets to pass through as it is, since the next order of the ribs has a protruding portion 11a, the same effect as the by the ridges 11a The water drops fall on the drain pan 3.

Most of the water condensed on both surfaces of the fins falls on the drain pan due to the action of the ribs 11... And the slit holes 12. Water droplets do not scatter from the exit.

The water droplets that have condensed on the surface of the fin group fall onto the drain pan 3 as described above. The water that has fallen on the drain pan 3 blows toward the discharge port side of the conditioned air by wind pressure until it reaches the drain hole 31. As shown in FIG. 2, water may be scattered from the drain pan by providing a rising piece 32 at the rear end of the drain pan 3 to block the water. .

[0015]

According to the heat exchanger for an air conditioner according to the present invention, the entire length of the portion of each fin into which the pipe is not inserted in the vertical direction can be obtained.
At predetermined intervals, a plurality of V-shaped ribs in cross-section
Open and protrude and adjoin each other in the room air flow direction.
The ribs in the opposite direction so that they are more windward than the above ribs.
Since the slit holes are formed in the fins on the side, even if the speed of the air to be treated, that is, the wind speed is increased, water droplets do not scatter from the discharge port, and heat exchange having a function of preventing water droplets from scattering The heat exchanger itself can be made compact as a heat exchanger.

[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.

[Description of Signs] 1 fin, 1A fin group, 2 pipe, 3 drain
Pan, 11 ribs, 12 slit holes.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 1/00 391 F24F 1/00 361 F25B 39/02

Claims (1)

(57) [Claims] 1. A plurality of fins are inserted through the pipes constituting the heat exchange coil in common fin group arranged in parallel at a predetermined interval, the lower end of the fin group, above during cooling
In a heat exchanger for an air conditioner provided with a drain pan that receives water drops dripping from the surface of the fin group, the vertical direction of the place where the pipe of each fin is not inserted
A plurality of V-shaped ribs in a sectional view over a predetermined length
Protrude at an interval and be adjacent to the room air flow direction.
Reverse the projecting direction of the mating ribs to
A heat exchanger for an air conditioner , wherein a slit hole is formed in the fin on the windward side .