JP5777111B2 - Auxiliary cooling device for condenser - Google Patents

Description

  The present invention relates to an auxiliary cooling device for an air-cooled condenser used in air-conditioning, refrigeration, refrigeration equipment, and the like, and more specifically, air sucked into the condenser of an air conditioner when the outside air temperature is high such as in summer. It is related with the auxiliary | assistant cooling device of the condenser for cooling the temperature of this.

Condensers used in refrigeration cycles such as air conditioning, refrigeration, and refrigeration equipment are either water-cooled or air-cooled, depending on the heat exchange method. Water-cooled has high heat exchange efficiency and is less affected by outside air even at high temperatures in summer. The room temperature can be kept relatively stable, but there is a problem that the structure of the apparatus is complicated and expensive, and maintenance is expensive.
On the other hand, the air-cooled type is inexpensive because it has a simple apparatus structure, but there is a problem that the cooling efficiency inside the room and the room is lowered at high temperatures in summer. As an auxiliary cooling device for an air-cooled condenser that compensates for this problem, for example, as shown in Patent Document 1, there is known an auxiliary cooling device that improves the cooling efficiency by spraying water directly on the radiating fins of the condenser. Yes.

JP-A-10-213361

  The auxiliary cooling device described in Patent Document 1 is for spraying fine granular or mist-like water almost uniformly by spray nozzles on the heat radiation fins of the condenser of the air-conditioning outdoor unit. The cooling fins are cooled by the above.

  However, although this patent document 1 improves the cooling efficiency by spraying tap water directly onto the heat dissipating fins of the condenser at a high temperature in summer, the surface of the heat dissipating fins can be scaled / scaled while the operation is continued for a long time. Therefore, there are problems that the heat exchange efficiency is lowered during air-cooling operation and the radiating fins are corroded. In particular, the radiating fins corrode and deteriorate over time, and it is necessary to replace the radiating fins or the condenser itself in 5 to 6 years.

  As an auxiliary cooling device for an air-cooled condenser that compensates for this problem, for example, Patent Document 2 shown below can be cited.

Japanese Patent Laid-Open No. 2004-3806

In the auxiliary cooling device shown in Patent Document 2, a cooling mat is installed in the vicinity of the heat dissipating fin of the condenser at a certain distance from the heat dissipating fin, and cooling water is allowed to flow down to the cooling mat to cool the intake air of the condenser. It is what I did.
However, since the cooling mat used in Patent Document 2 is a fibrous one, there are problems such as low cooling efficiency in structure and an increase in pressure loss due to clogging.

  As an example of solving the problem of Patent Document 2, Patent Document 3 shown below can be cited as an example.

JP 2009-236370 A

  As shown in FIG. 18, the auxiliary cooling device described in Patent Document 3 has a filler 61 arranged on the upstream side of the intake air of the air-cooled condenser 60. It has a predetermined thickness in the direction of the intake air. Then, water is poured into the filler 61 from above, and the water flowing out from the lower portion of the filler 61 is collected in the collection container 62.

  The water recovered in the recovery container 62 is pumped up to the upper portion of the filler 61 through the water supply pipe 64 by the pump 63, and the pumped water passes through a plurality of drain ports provided in the water supply container 65, The filler 61 is made to flow uniformly from above to inside. Water is allowed to flow down in the filler 61, and the water in the filler 61 is evaporated by the intake air of the condenser 60, whereby the intake air is cooled by the action of heat of vaporization.

FIG. 19 shows an enlarged cross-sectional view of the main part of the filler 61. The filler 61 is formed by laminating and bonding corrugated plates, and cutting from a predetermined location. A plurality of descending air flow passages 70 and 71 are formed.
The air flow passage 70 indicated by a solid line rises, a large number of the air flow passages 70 are formed in the vertical direction, the air flow passage 71 indicated by a broken line descends, and the air flow passage 71 is in relation to the air flow passage 70. Are formed adjacent to each other in the width direction, and many are formed in the vertical direction.

  An arrow A indicated by a solid line indicates the intake air flowing through the air flow passage 70, and an arrow B indicated by a broken line indicates the intake air flowing through the air flow passage 71. And in this patent document 3, the turbulent flow of air is accelerated | stimulated by the air flow path 70 and 71 which inclined alternately, and it is trying to improve an intake air cooling performance.

  It has been found that when the air conditioner is operated using the above-mentioned filler 61 and the end of one season in summer when cooling performance is exhibited, the outer surface portion of the filler 61 becomes white and deteriorates. . FIG. 20 shows a front view of the filler 61, and there is a problem that the entire surface of the filler 61 becomes white and deteriorates. Therefore, it looks bad and the filler 61 deteriorates and gives an odd feeling.

The present invention is provided in view of the above-described problems, and provides an auxiliary cooling device for a condenser having at least the following objects.
(1) To prevent the surface of the water retaining material (corresponding to the conventional filler 61) from becoming white and deteriorating.
(2) Divide the water retaining material into upper and lower parts and visualize the water flow so that the water flow can be seen without coating the upper water retaining material.
(3) The surface of the lower water retention material should be coated to prevent deterioration of the water retention material.
(4) The upper water retention material has a water dispersing effect, and the lower water retention material is efficiently and evenly distributed.
(5) The upper water retention material should have a filter effect.

Therefore, in the auxiliary cooling device for a condenser according to claim 1 of the present invention, the vaporization type air cooling device 11 constituted by the water retaining material 30 is provided on the windward side of the condenser 3 of the outdoor unit 1 installed outside the room. It arrange | positions in the vicinity of the condenser 3, water is made to flow down to the water retention material 30 of the said vaporization type air cooling device 11, and the vaporization type air cooling device 11 utilizes the latent heat at the time of the water vaporization by the said water retention material 30. In the auxiliary cooling device for the condenser, which cools the air sucked into the condenser and cools the condenser 3 with the cooled sucked air.
The water retentive material 30 has a two-layer structure of an upper portion and a lower portion, the upper portion is an upper water retentive material 30a, and the lower portion is a lower water retentive material 30b.
Painting the windward surface of the lower water retention material 30b;
The windward surface of the upper water retaining material 30a is not coated.

  The auxiliary cooling device for a condenser according to claim 2 is characterized in that a height dimension of the upper water retention material 30 a is about 10 to 15% of a height dimension of the water retention material 30.

  The auxiliary cooling device for a condenser according to claim 3 is characterized in that the upper water retaining material 30a is divided into a plurality of upper water retaining materials 30aa and 30ab by dividing the upper water retaining material 30a in the vertical direction.

  5. The auxiliary cooling device for a condenser according to claim 4, wherein the water retention material 30 includes a plurality of air flow passages 52, and the size of the air flow passage 52 of the upper water retention material 30 a is set to the lower water retention material. It is characterized in that it is set smaller than the size of the air flow passage 52 of 30b.

  The auxiliary cooling device for a condenser according to claim 5 is characterized in that a number of holes 45 are perforated in the upper water retaining material 30a in the lateral direction.

  According to the auxiliary cooling device for a condenser according to claim 1 of the present invention, the water retaining material 30 has a two-layer structure of an upper part and a lower part, the upper part is an upper water retaining material 30a, the lower part is a lower water retaining material 30b, By coating the windward surface of the lower water retention material 30b and not coating the windward surface of the upper water retention material 30a, the surface of the lower water retention material 30b absorbs ultraviolet rays by replacement coating. Can be prevented from being deteriorated. In addition, the upper water retaining material 30a can visually recognize the flow of water and can be visualized. Although the upper water retentive material 30a becomes white and deteriorates, only the upper water retentive material 30a has to be replaced, and the replacement cost can be kept low.

  According to the auxiliary cooling device for a condenser according to claim 2, a height dimension of the upper water retention material 30 a is about 10 to 15% of a height dimension of the water retention material 30. Since the replacement cost of 30a is about 10 to 15% from the whole, it can be kept inexpensive. Moreover, since the size and the lower water retaining material 30b are small, the replacement work is facilitated. Furthermore, since the water circulates, the upper water retaining material 30a can have a filter effect of filtering dust and dust.

  According to the auxiliary cooling device for a condenser according to claim 3, the upper water retention material 30a is divided into a plurality of upper water retention materials 30aa and 30ab by dividing the upper water retention material 30a in the vertical direction. The water dispersion effect can be increased by the material 30a, and the cooling performance of the lower water retention material 30b can be increased.

  According to the condenser auxiliary cooling device according to claim 4, the water retaining material 30 includes a plurality of air flow passages 52, and the size of the air flow passage 52 of the upper water retaining material 30 a is set to the lower portion. Since it is set smaller than the size of the air flow passage 52 of the water retaining material 30b, the water dispersion effect in the upper water retaining material 30a can be further increased, and the cooling performance in the lower water retaining material 30b can be further improved. .

  According to the auxiliary cooling device for a condenser according to claim 5, the upper water retention material 30 a has a large number of holes 45 in the horizontal direction, so that water is transmitted in the horizontal direction through the holes 45. Thus, the water dispersion effect in the upper water retaining material 30a can be further increased.

It is a schematic block diagram of the outdoor unit and auxiliary cooling device in embodiment of this invention. It is the schematic which looked at the auxiliary cooling device in embodiment of this invention from the front. It is a figure which shows the refrigerating cycle in embodiment of this invention. It is explanatory drawing in the case of manufacturing the water retention material in embodiment of this invention. It is explanatory drawing in the case of manufacturing the water retention material in embodiment of this invention. It is explanatory drawing in the case of manufacturing the water retention material in embodiment of this invention. It is explanatory drawing in the case of manufacturing the water retention material in embodiment of this invention. It is a principal part expanded sectional view of the water retention material in embodiment of this invention. It is a front view of the water retention material divided | segmented into 2 layers in embodiment of this invention. It is sectional drawing of the water retention material divided | segmented into 2 layers in embodiment of this invention. It is a disassembled perspective view of the case main body which installs the water retention material in embodiment of this invention. It is explanatory drawing in the case of mounting the water retention material divided | segmented into two layers into the case main body in embodiment of this invention. It is a front view at the time of mounting a water retention material in the case main body in embodiment of this invention. It is explanatory drawing in the case of replacing | exchanging the upper water retention material in embodiment of this invention. It is a front view at the time of making the eyes of the upper water retention material fine in the embodiment of the present invention. It is a front view at the time of multilayering the upper water retention material in embodiment of this invention into two layers. It is sectional drawing at the time of making a hole in the horizontal direction in the upper water retention material in embodiment of this invention. It is a schematic block diagram of the outdoor unit and auxiliary cooling device of a prior art example. It is a principal part expanded sectional view of the filler of a prior art example. It is a front view of the filler of a prior art example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic configuration diagram when the auxiliary cooling device 10 is installed on the upstream side of the intake air of the outdoor unit 1, and FIG. 2 shows a schematic front view seen from the direction A of FIG. .
The outdoor unit 1 are the well-known configuration, is omitted a detailed description, the condenser 3 is disposed in one of the outdoor unit 1 of the case 2, the upper portion of the case 2 a cooling fan 4 is provided Yes. In the present embodiment, the cooling fan 4 is provided on the upper portion of the case 2, but the cooling fan 4 may be provided at a position facing the condenser 3.

  The auxiliary cooling device 10 includes a vaporization type air cooling device 11, which will be described in detail later, a water recovery device 13 that recovers water drained from the vaporization type air cooling device 11 through the drain pipe 12, and the water recovery device 13. A water supply pipe 15 that supplies water stored in the vaporization type air cooling device 11 through a pump 14, a water supply device 16 that supplies water from the water supply pipe 15 to the upper surface of the vaporization type air cooling device 11, etc. It consists of

  In FIG. 1, the water supply pipe 15 is drawn on the right side of the outdoor unit 1, but the actual construction is arranged on the side of the outdoor unit 1 on the side of the vaporization air cooling device 11. . However, the vaporization type air cooling device 11 of the auxiliary cooling device 10 is arranged in the vicinity of the outdoor unit 1 on the upstream side of the intake air of the condenser 3, but the other water recovery device 13 and the water supply pipe 15 are optional. Placed and constructed at

  As shown in FIG. 2, the vaporization type air cooling device 11 is substantially the same as or slightly larger than the size of the condenser 3, and the vaporization air cooling device 11 defines the air suction surface of the condenser 3. It is the size to cover.

FIG. 3 shows a well-known refrigeration cycle. The refrigeration cycle includes a condenser 3, a compressor 5, an evaporator 6 in an indoor unit installed indoors, an expansion valve 7, and the like. Connected.
During the cooling operation, the refrigerant in the refrigerant pipe 8 is compressed by the compressor 5, and the refrigerant becomes a high-temperature gas. The refrigerant 3 is kept at a constant temperature by the latent heat of water when the condenser 3 is vaporized by the cooling fan 4. The refrigerant gas is liquefied by being lowered. The refrigerant pressure is suddenly lowered by the expansion valve 7 and is cooled by the latent heat of the refrigerant gas. The temperature of the room is exchanged by the evaporator 6, and the cool air is sent from the indoor unit to the room for cooling. .

In this embodiment, the water in the water recovery device 13 is circulated to the vaporization type air cooling device 11 via the pump 14 and the water supply pipe 15, and the latent heat generated when water is vaporized is used in the vaporization type air cooling device 11. Thus, the temperature of the air sucked in the vaporization type air cooling device 11 is lowered, and the condenser 3 is cooled by the lowered air.
The water flowing down in the vaporization type air cooling device 11 is recovered by the water recovery device 13 through the drain pipe 12.

The water recovery device 13 is supplied with makeup water such as tap water from a makeup water pipe 20, and a float valve 21 is interposed in the makeup water pipe 20. The float valve 21 is a valve that opens and closes when the float 22 floating on the liquid surface moves in the vertical direction according to the height of the liquid surface.
When the liquid level of the water recovery device 13 becomes a predetermined height or less, the float 22 descends, the float valve 21 opens, and water is supplied from the makeup water pipe 20. Further, when makeup water is supplied and the liquid level reaches a predetermined height or more, the float 22 rises, the float valve 21 is closed, and the supply of water from the makeup water pipe 20 is stopped.

  The water supply device 16 that circulates water from the water recovery device 13 to the vaporization type air cooling device 11 and supplies the water is approximately the same length as the width direction of the vaporization type air cooling device 11. For example, a plurality of holes are drilled in a pipe. In addition, water is dropped or sprinkled on the upper surface of the vaporization type air cooling device 11 from these holes.

  As shown in FIG. 2, a drainage basin 25 is provided at the lower part of the vaporization type air cooling device 11. A drainage pipe 12 is connected to the end of the drainage basin 25, and the vaporization type air cooling device 11 The water that has flowed down is recovered by the water recovery device 13.

Next, the configuration of the vaporization type air cooling device 11 will be described. As shown in FIG. 1, the evaporative air cooling device 11 includes a water retaining material 30 that is sucked and discharged as indicated by an arrow. The water retaining material 30 is generally called a cooling pad (cooling pad) and is made of a paper material.
Moreover, this cooling pad is mainly used for lowering the temperature of barns and horticultural facilities, and in Japan, it is widely used in windowless barns and greenhouses for horticulture.

Here, in this embodiment, as shown in FIG.1 and FIG.2, the water retention material 30 is made into the upper and lower two layer structure, the upper water retention material 30 is made into the upper water retention material 30a, and the lower water retention material 30 is made into the lower water retention material 30b. And The material itself is the same for both the upper water retaining material 30a and the lower water retaining material 30b.
When two layers of the upper water retaining material 30a and the lower water retaining material 30b are arranged in two upper and lower layers, when the height dimension is, for example, 120 cm, the height of the upper water retaining material 30a is about 15 cm to 20 cm. That is, the height dimension of the upper water retaining material 30 a is set to about 10 to 15% of the height dimension of the water retaining material main body 30.

4 to 7 show how to make the water retaining material 30, and the structure of the water retaining material 30 will be described so that the structure of the water retaining material 30 can be easily understood. In FIG. 4, corrugated corrugated sheets 51 are formed by laminating multiple layers, and each corrugated sheet 51 is made of strongly processed paper. In addition, the groove | channel 52 formed in the waveform shape of the corrugated board material 51 and formed continuously becomes an air flow path.
The upper and lower corrugated sheets 51 are alternately combined at an arbitrary angle, for example, around 30 °, with respect to the intake direction, and the lower corrugation of the upper corrugated sheet 51 and the upper apex of the wave of the lower corrugated sheet 51 are combined. that bets intersect, that is, bonding the portions of the black circle shown in FIG. 5 (●) with an adhesive, to adhere the upper and lower wave plate 51.

  A plurality of corrugated sheet materials 51 are laminated in the water retaining material body 55 shown in FIG. 6, and the water retaining material body 55 is cut with a cutter or the like in the direction indicated by the arrow in FIG. A water retaining material piece 56 is obtained. And as shown in FIG. 7, the water-retaining material 30 of arbitrary magnitude | sizes can be formed by cut | disconnecting with a cutter etc. as shown to the arrow B of the vertical direction and a horizontal direction.

  In addition, the water retaining material 30 can be easily manufactured in any thickness and size, and when the corrugated sheet material 51 is laminated up and down, the corrugated sheet material 51 is inclined and laminated at an arbitrary angle. The inclination angle of each groove 52 of the corrugated sheet material 51 with respect to the intake direction of outside air can also be arbitrarily formed. Moreover, as shown in FIG. 4, the width dimension L and the height dimension H of the groove | channel 52 can be manufactured arbitrarily.

FIG. 8 shows an enlarged cross-sectional view of the main part of the water retention material 30 manufactured as described above. The condenser 3 is located on the right side of the water retention material 30, and the air is retained from the left side as indicated by the arrow. The groove 52 (hereinafter, this groove is referred to as “air flow passage”).
For example, the air flow passage 52 shown by the solid line rises with an inclination of 30 °, is adjacent to the air flow passage 52 shown by the solid line in the width direction, and the air flow passage 52 shown by the broken line is For example, it is configured to descend with an inclination of 30 °. These air flow passages 52 are formed continuously in the vertical direction and the horizontal direction of the water retaining material 30.

  Water from the water supply device 16 is dripped onto the water retaining material 30 and the water retaining material 30 itself absorbs water to become wet. At the same time, water flows down the surface of the water retaining material 30, that is, the front and back surfaces of each air flow passage 52. Then, the water that has not been absorbed by the water retention material 30 flows along the surface of the water retention material 30 to the water recovery device 13 and is recovered.

  As described in the conventional example, the reason why the surface of the water retaining material 30 becomes white and deteriorates is considered to be caused by the ultraviolet rays from the intense sun especially in summer. It is necessary to prevent the surface of the water retaining material 30 from becoming white due to the ultraviolet rays. Therefore, as a result of trial and error, the present inventor conducted an experiment to determine whether deterioration can be prevented by coating the surface of the water retaining material 30 and absorbing ultraviolet rays at the painted portion. did it.

Then, it is conceivable that there are two ways of painting the surface portion of the water retaining material 30 or replacing the water retaining material 30 after it has been severely degraded without painting while leaving the degradation intact.
The advantage of coating the surface of the water retaining material 30 is that the surface of the water retaining material 30 is unlikely to deteriorate since the ultraviolet rays are absorbed by the painted portion and the surface of the water retaining material 30 itself does not hit. However, as a drawback, the flow of water in the water retaining material 30 cannot be confirmed by visual recognition. In order to check the flow of water, the user actually touches the surface of the water retaining material 30 and sees it.

  On the other hand, in the case where the surface of the water retaining material 30 is not coated, although the flow of water can be visually confirmed, the surface of the water retaining material 30 is severely deteriorated, and the water retaining material 30 needs to be replaced every year. As a result, the problem that running cost becomes high arises.

  Therefore, in the present embodiment, as described above, the water retaining material 30 has a two-layer structure in which the water retaining material 30 is divided into two vertically, and the lower upper water retaining material is not coated on the surface of the upper upper water retaining material 30a. The surface of 30b is coated.

  FIG. 9 shows a front view of the vaporization type air cooling device 11, and FIG. 10 shows a cross-sectional view of the vaporization type air cooling device 11. As shown in FIGS. 9 to 11, the water retaining material 30 is disposed in a case main body 33 having a large opening at the front and rear surfaces. The case main body 33 includes a lower case 34 and an upper surface of the lower case 34. And a cover 35 covering the opening surface.

  As shown in FIG. 11, the lower case 34 is formed in a substantially U shape, and a regulation piece 36 is integrally formed to extend inward at the edge portions on both sides. The water retaining material 30 is disposed inside the regulating piece 36, and the water retaining material 30 is positioned by the regulating piece 36 in the front-rear direction and the lateral direction. Further, for example, two screw holes 38 are threaded on the upper portions of the side pieces 37 on both sides of the lower case 34.

  The cover 35 disposed on the upper surface of the lower case 34 is formed in a substantially flat plate shape, and bent fixing pieces 40 are formed on both sides. Holes 41 are respectively drilled in the fixed pieces 40, and bolts 42 are inserted into the holes 41, and screw portions of the bolts 42 are screwed into screw holes 38 of the lower case 34. 34 is fixed.

In FIG. 12, the upper water retaining material 30a and the lower water retaining material 30b are inserted into the lower case 34 from above, and the cover 35 is fixed to the lower case 34 from above as described above. Accordingly, the water retention material 30 including the upper water retention material 30 a and the lower water retention material 30 b is disposed in the case main body 33, and the water retention material 30 is positioned in the case main body 33 in the front-rear, left-right, and upper directions.
Here, the upper water retention material 30a is arranged directly on the upper surface of the lower water retention material 30b. This state is shown in FIG.

  As described above, water is sprinkled from the water supply device 16 to the water retaining material 30. First, water is dropped onto the upper surface of the upper water retaining material 30a and flows downward while wetting the upper water retaining material 30a. . The water flowing out from the lower surface of the upper water retaining material 30a flows to the upper surface of the lower water retaining material 30b, and flows downward while wetting the lower water retaining material 30b. Moreover, the ultraviolet rays from the sun are irradiated to the entire outer surface of the upper water retention material 30a and the lower water retention material 30b.

In this embodiment, the water-based paint is applied to the back about 1 cm from the outer surface of the lower water retaining material 30b. The paint color is not particularly required, and any color may be used. Further, the surface of the upper water retaining material 30a is not painted.
By coating the surface of the lower water retention material 30b, the ultraviolet rays are absorbed by this painted portion, and the ultraviolet rays do not reach the material of the lower water retention material 30b, thereby preventing the lower water retention material 30b from deteriorating.

  When the water is flowing evenly through the water retaining material 30, it can be easily visually recognized even from a slightly separated position without having to confirm the state of the water flowing by hand. However, when the surface of the lower water retaining material 30b is coated, even if water is flowing, it cannot be visually recognized. Therefore, the current situation is that it can be confirmed only by hand whether or not the water is flowing evenly.

  On the other hand, since the surface of the upper water retention material 30a is not coated, it can be visually confirmed whether or not water is flowing evenly through the upper water retention material 30a. As a result of various experiments, when water flows evenly through the upper water retention material 30a, it is confirmed that water flows evenly through the lower lower water retention material 30b.

Although the upper water retaining material 30a and the lower water retaining material 30b are exposed to ultraviolet rays, since the surface of the lower water retaining material 30b is coated, the surface of the lower water retaining material 30b is hardly deteriorated, but the surface of the upper water retaining material 30a is not deteriorated. Since no coating is applied, the surface of the upper water retaining material 30a is deteriorated.
However, when viewed as the entire water retaining material 30, only the upper upper water retaining material 30a deteriorates, and is about 10% in terms of the entire volume. Since only the deteriorated upper water retentive material 30a needs to be replaced with a new upper water retentive material 30a, the cost can be kept low.

FIG. 14 shows a case where the upper water retention material 30a is replaced. The cover 35 is removed from the lower case 34, and only the upper upper water retention material 30a is replaced. Therefore, since the upper water retaining material 30a is also small and light when viewed from the whole water retaining material 30, that is, when compared with the lower water retaining material 30b, the upper water retaining material 30a is smaller and lighter, and only the upper water retaining material 30a is replaced. Therefore, the replacement work is easy.
Conventionally, when the entire water retaining material is replaced, a large water retaining material is lifted upward from the lower case 34 and the replacement work is difficult.

Further, the water flowing through the upper water retention material 30a and the lower water retention material 30b is circulated through the water recovery device 13, the water supply pipe 15, and the water supply device 16, and in particular, the upper water retention material 30a and the lower water retention material 30b are exposed to the outside air. Therefore, garbage and dust are circulated together. Therefore, if the upper water retention material 30a is used for a long period of time, dust and dust accumulate in the upper water retention material 30a, deteriorating the wetting action of water on the upper water retention material 30a and impairing the cooling function of the condenser 3. .
That is, the upper water retention material 30a has a function of filtering the water supplied from the water supply device 16 by the upper water retention material 30a, and the upper water retention material 30a has a filter function.

  When the upper water-retaining material 30a is deteriorated by ultraviolet rays, the upper water-retaining material 30a is replaced, so that the new upper water-retaining material 30a newly filters dust and dust and the dust and dust flow to the lower water-retaining material 30b. Is blocking. Thereby, a wet action can be efficiently given to the renewed upper water retention material 30a.

Here, the lower water-retaining material 30b and the upper water-retaining material 30a, but the magnitude of the air flow passage 52 is used as the same, can be used having different sizes of the air flow passage 52 appropriately . That is, as shown in FIG. 4, by reducing the width L and the height H of the air flow passage 52, the size of the air flow passage 52 can be reduced.

FIG. 15 shows a case where the size of the air flow passage 52 of the upper water retention material 30a is made smaller than the size of the air flow passage 52 of the lower water retention material 30b. It is fine.
The eye by using fine Kushida upper portion retaining material 30a, it is possible to enhance the dispersion effect of water in the upper water-retaining material 30a, evenly flow that throughout the water against the lower side of the lower water-retaining material 30b Can do. Thereby, the cooling performance in the lower water retention material 30b can be further improved.

  Further, in the previous embodiment, the upper water retention material 30a has one layer, but as shown in FIG. 16, it may have two layers of upper water retention materials 30aa and 30ab. The upper water retention material 30a may have a three-layer structure. The fineness of the upper water retention materials 30aa and 30ab may be the same as that of the lower water retention material 30b, or may be finer than that of the lower water retention material 30b as shown in FIG. .

  In this way, the upper water retention material 30a is made into a two-layer upper water retention material 30aa, 30ab, or three layers, thereby further improving the dispersion of water in the upper water retention material 30a and lower water retention in the lower water retention material 30b. The cooling performance of the material 30b can be further improved. Of course, it is good also as four or more layers in the possible range.

Further, FIG. 17 shows a case where a large number of holes 45 are formed in the horizontal direction in the upper water retaining material 30a. Water can be transmitted laterally through the holes 45 to further increase the water dispersion effect in the upper water retaining material 30a.
In addition, even when the upper water retention material 30a shown in FIG. 16 is multilayered, the holes 45 are formed in the upper water retention materials 30aa and 30ab in the lateral direction to further improve the dispersion effect in the upper water retention material 30a. Anyway.

  Here, the height dimension of the upper water retention material 30a is set to about 10 to 15% of the height dimension of the water retention material body 30 for the following reason. That is, if it is shorter than 10% or less, it is difficult to see the water flowing, and if it is 16% or more, the upper water retaining material 30a becomes large, and the running cost for replacement increases. This is because the upper water-retaining material 30a becomes heavy in the work at the time, and the workability of the replacement work is deteriorated.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 3 Condenser 11 Evaporation type air cooling device 30 Water retention material (water retention material main body)
30a Upper water retaining material 30b Lower water retaining material 45 Hole 52 Air flow passage

Claims (5)

An evaporative air cooling device (11) composed of a water retaining material (30) is arranged in the vicinity of the condenser (3) on the windward side of the condenser (3) of the outdoor unit (1) installed outdoors. Then, water is allowed to flow down to the water retention material (30) of the vaporization type air cooling device (11) and the latent heat generated when the water is vaporized by the water retention material (30) is used for the vaporization type air cooling device (11). In the auxiliary cooling device for the condenser, which cools the sucked air and cools the condenser (3) with the cooled sucked air.
The water retention material (30) has a two-layer structure of an upper portion and a lower portion, the upper portion is an upper water retention material (30a), and the lower portion is a lower water retention material (30b),
Apply the coating on the windward surface of the lower water retention material (30b),
An auxiliary cooling device for a condenser, wherein the windward surface of the upper water retaining material (30a) is not coated.   The auxiliary cooling device for a condenser according to claim 1, wherein a height dimension of the upper water retention material (30a) is about 10 to 15% of a height dimension of the water retention material (30).   The condenser according to claim 1 or 2, wherein the upper water retention material (30a) is divided into a plurality of upper water retention materials (30aa) (30ab) by dividing the upper water retention material (30a) in a vertical direction. Auxiliary cooling device.   The water retentive material (30) includes a number of air flow passages (52), and the size of the air flow passage (52) of the upper water retentive material (30a) is determined according to the air flow of the lower water retentive material (30b). The auxiliary cooling device for a condenser according to any one of claims 1 to 3, wherein the size is set smaller than the size of the passage (52).   The auxiliary cooling device for a condenser according to any one of claims 1 to 4, wherein a number of holes (45) are formed in the upper water-retaining material (30a) in a lateral direction.

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