JP3707737B2 - Outdoor heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outdoor heat exchanger used for an air-cooled refrigerator, an air conditioner, and the like, and more particularly to an outdoor heat exchanger that has stabilized cooling capacity and improved energy saving, maintenance, and durability.
[0002]
[Prior art]
Conventional outdoor heat exchangers used for air-cooled refrigerators are equipped with heat transfer fins to increase the cooling capacity of copper tubes, but aluminum plates that are suitably used as heat transfer fins are discharged from the vehicle. In addition to sulfurous acid gas, nitrogen oxidant gas, carbon dioxide gas, acid rain, etc., corrosion is likely to occur due to oxidative particulates, etc., and even in home coolers, spotted corrosion occurs in three months from the new article. Since dust and dust are likely to adhere to such a corroded portion, there is a problem that heat conduction is deteriorated and heat conduction fins are clogged to prevent heat radiation, resulting in poor heat efficiency. In addition, dust, suspended dust, dust, and the like adhering to the corroded portion of such a heat transfer fin are sticky and difficult to remove, and maintenance performance is poor, so it is difficult to maintain cooling performance.
As a result, air-cooled refrigerators such as frozen foods, refrigerated foods, chilled foods, meat, fresh fish, prepared dishes, and frozen cases used in large stores such as supermarkets have a reduced cooling capacity when the temperature rises in summer, etc. There was a problem that the bill would rise.
There are the following solutions to solve these problems.
(Patent Document 1) discloses “aluminum fin material for heat exchangers obtained by applying a surface treatment agent and a hydrophilization treatment agent to the fin material surface”.
(Patent Document 2) discloses “an air conditioner that pumps cold condensed water to a water pipe and sprays it on the fins of a heat exchanger through a nozzle”.
(Patent Document 3) “A spray nozzle that sprays water droplets on cooling air from a blower fan to a fin tube in an air-cooled heat exchanger that sends cooling air by a blower fan and cools the fluid in the fin tube in a non-contact manner. An air-cooled heat exchanger provided with the above is disclosed.
[0003]
[Patent Document 1]
JP 2002-241963 A
[Patent Document 2]
Japanese Patent Laid-Open No. 2002-5468
[Patent Document 3]
JP 2002-122387 A
[0004]
[Problems to be solved by the invention]
However, the above conventional techniques have the following problems.
In (1) (Patent Document 1), since the surface treatment agent must be applied and dried on the surface of the fin material, the hydrophilic treatment agent must be applied and dried on the surface of the surface treatment agent film. However, man-hours are required, and it is difficult to control and equalize the film thickness, resulting in poor productivity.
In (2) (Patent Document 2), the condensed water that adheres to the heat exchanger during the cooling operation and drops is collected, and is pumped to the water pipe by the pump and sprayed onto the fins of the heat exchanger through the nozzle. Condensed water can be used effectively and chlorine is not contained, so corrosion of fins can be prevented. However, it is necessary to store condensed water, the configuration is complicated, and it is difficult to add to existing heat exchangers. Had problems.
(3) (Patent Document 3) sprays water droplets on cooling air, vaporizes the water droplets on the surface of the fin tube, and attempts to cool them by the latent heat, but requires a blower fan and drives the blower fan. When water droplets adhere to electrical components such as an electric motor, there is a problem that corrosion occurs. In addition, in order to prevent adhesion of water droplets, it is necessary to control the rotation speed of the blower fan and the particle size of the water droplets, and there is a problem that the configuration is complicated and cannot be easily added to an existing heat exchanger. It was.
[0005]
The present invention solves the above-mentioned conventional problems, can improve and stabilize the cooling performance with a simple configuration, can be easily manufactured and mass-produced, has uniform quality, excellent durability, stable performance, and maintainability. An object is to provide an outdoor heat exchanger that can be obtained.
[0006]
  In order to solve the above problems, the outdoor heat exchanger of the present invention has the following configuration.
  The outdoor heat exchanger according to claim 1 of the present invention is(A)On one or both sidesPrinted layer or coatingA plurality of heat transfer fins made of aluminum or aluminum alloy on which a coating layer is formedOutdoor heat exchanger body withWhen,(B)A nozzle portion disposed opposite to the heat transfer fin arrangement portion and provided with a spray nozzle; a water pipe for supplying water to the nozzle portion; and a water supply pipe connected to the water pipe;An activated carbon storage pipe detachably disposed in the middle of the pipe of the water supply pipe, and a water droplet spraying pipe for spraying water droplets from the front of the outdoor heat exchanger bodyIt has the structure provided with.
  This configuration has the following effects.
(1) By having an adhesion layer on the surface of the heat transfer fin, corrosion due to acid rain or the like can be prevented and durability can be improved without deteriorating heat conduction.
(2) Since corrosion of the heat transfer fin surface is prevented, even if dust or dust adheres to the heat transfer fin, the performance is maintained by simply removing dust and dust by washing with rainwater or tap water from the spray nozzle. be able to.
(3) By having an adhesion layer on the surface of the heat transfer fin, corrosion by chlorine contained in tap water does not occur even when washed with tap water, and the heat transfer fin can be kept clean. It is possible to prevent clogging between the fins and hinder heat dissipation, thereby preventing a decrease in thermal efficiency.
(4) Even if it is installed on a veranda or a rooftop of a building, etc., and is exposed to sunlight, rain, exhaust gas, etc., it has an adherent layer, so durability can be maintained.
(5) Outdoor heat exchangerBodyBy spraying water droplets from the front and wetting the heat transfer fins, the cooling efficiency can be improved by utilizing the latent heat of water evaporation.
(6) Outdoor heat exchangerBodyBy having an adhesion layer on the surface of the heat transfer fins, corrosion of fins due to chlorine contained in tap water does not occur even when tap water is sprayed, so it is easy to add a spray nozzle connected to the tap water. Cooling efficiency can be increased.
(7) The outdoor heat exchanger can be cleaned using water sprayed from the spray nozzle, and the performance of the outdoor heat exchanger can be maintained.
(8) Since the temperature of the outside air is lowered by spraying water, the cooling efficiency can be increased and the outdoor heat exchanger that is intensively arranged in a building or the likeBodyA rise in ambient temperature can also be reduced.
(9) By forming the adherent layer by printing, the manufacturing process is simple, the yield is good, and mass production can be performed uniformly.
(10) When an epoxy one-component heat curing ink is used as the thermosetting (baking and drying) ink, it is excellent in workability and adherence strength, so secondary processing such as pressing and bending. Even if it performs, a favorable deposit layer can be formed.
(11) When a coating film is formed as the adherent layer, it can be easily applied at low cost by using a spray type.
(12) In both cases of printing and coating, by making the color white or silver, it is difficult to absorb light or heat, so that the heat dissipation efficiency is improved and the appearance of the apparatus can be matched.
(13) Since it has an activated carbon storage pipe in the middle of the pipe of the water supply pipe, it can remove chlorine contained in tap water, prevent salt corrosion of fins, improve durability, have little secular change, long-term Performance can be maintained over time.
(14) Since the activated carbon storage tube is detachable, the activated carbon can be easily replaced and the chlorine removal effect can be maintained.
[0007]
Here, examples of the deposition layer formed on the surface of the heat transfer fin include a printing layer and a coating film.
In the case of printing, offset printing or screen printing generally performed on aluminum cans or other metal plates is suitable. By forming the deposition layer by printing, the manufacturing process is simple, the yield is good, and mass production can be performed uniformly.
In the case of screen printing, pressure film printing corresponding to a thickness 5 to 10 times that of offset printing is possible, and smearing is difficult and weather resistance is excellent. However, the thickness is preferably about 0.05 μm to 20 μm. If the thickness is less than 0.05 μm, smear tends to occur and the durability tends to decrease, and if it is more than 20 μm, the heat dissipation tends to decrease, such being undesirable.
In addition, types of ink used for screen printing include solvent drying type, reaction curing type, thermosetting type (baking drying type), etc., but smoothness, adhesion, weather resistance, water resistance, chemical resistance A thermosetting type (baking and drying type) having excellent durability is suitable. As the thermosetting (baking and drying) ink, an epoxy one-component heat-curable ink is preferable. Since it is a one-component heat-curing type, it has excellent workability and excellent adhesion strength, so that a good adhesion layer can be formed even if secondary processing such as pressing or bending is performed.
When a coating film is formed as the adherent layer, a spray type is preferable. Thereby, it can be constructed inexpensively and easily.
In both cases of printing and coating, the color is preferably white or silver. Thereby, since it is difficult to absorb light, heat, etc., heat dissipation efficiency improves, and it can match with the appearance of the apparatus.
[0008]
When using an aluminum plate as a heat transfer fin, it is desirable to first print on a flat aluminum plate and then drill a through hole through which the hairpin tube is inserted. Thereby, a good deposition layer can be formed.
As a method of closely attaching the heat transfer fin and the hairpin tube, the inner diameter of the through hole formed in the heat transfer fin is processed to be larger than the outer shape of the hairpin tube, and after inserting the hairpin tube into the heat transfer fin, mechanically There are a method in which the hairpin tube is expanded and brought into close contact with the heat transfer fin, and a method in which the inner diameter of the through hole formed in the heat transfer fin is made smaller than the outer shape of the hairpin tube and the heat transfer fin is press-fitted.
A copper, stainless steel, or iron tube is preferably used as the hairpin tube, and is reciprocated between the laminated heat transfer fins in a zigzag manner and connected to one. A copper, stainless steel, or iron tube is preferably used for the U-shaped bend connected to the end to connect the hairpin tubes into one.
The heat transfer fins are laminated in a horizontal direction and a vertical direction. In the case of the horizontal direction, the deposited layer may be at least on the upper surface side after lamination. It is desirable to have a layer. This effectively protects the heat transfer fins from dirt such as smoke.
[0009]
  A pipe made of synthetic resin or metal is used for the pipe from the tap water supply source to the spray nozzle. It is desirable to use a pipe made of synthetic resin or the like for the water supply pipe from the tap water supply source to the vicinity of the heat exchanger. Thereby, since it is excellent in workability and workability, installation is easy, and the flow rate can be ensured by thickening the pipeline. Further, a water pipe is provided in the middle of the water supply pipe by a trifurcation or the like, and a water pipe to the front of the heat exchanger to which the spray nozzle is connected is disposed.
  By using a copper pipe for the water flow pipe, a flare joint with reliable connection can be used, and water leakage and the like can be reliably prevented. The inner diameter of the water pipe is preferably about 2 mm to 6 mm. If the inner diameter is thinner than 2 mm, a sufficient flow rate cannot be obtained, and if the inner diameter is larger than 6 mm, the water pressure tends to be low and the entire heat exchanger cannot be sprayed. Spraying to about 10 heat exchangers with an inner diameter of about 4 mm is possible.
  At this time, the spray amount is preferably about 2 L to 3 L per one outdoor heat exchanger per hour. If the amount of spray is less than 2L, the effect of latent heat of vaporization is reduced. .
[0010]
  A valve may be disposed between the spray nozzle and the water pipe. Thereby, the start and stop of spraying can be switched for each heat exchanger, and unnecessary consumption of water can be prevented. The valve may be an electromagnetic valve instead of manual operation. Thereby, the start and stop of spraying, control of pressure, flow rate, and the like can be easily performed.
  Furthermore, when spraying simultaneously with respect to several heat exchangers, you may install a water supply tank and spray by pressurizing water with a compressor. Thereby, while reducing the amount of water, it can spray efficiently over a wide range.
  Examples of the raw material of the activated carbon stored in the activated carbon storage pipe include sawdust, charcoal, peat, coal, coconut shell, etc., but it is desirable to use a coconut shell having a large specific surface area. Thereby, it is excellent in dechlorination property. The granular activated carbon is preferably contained in a water-permeable bag. At this time, it is desirable to provide a mesh-like lid body at least on the downstream side of the activated carbon storage tube, which makes it easy to handle and can be easily purchased and replaced. Moreover, as a shape of activated carbon, a granular thing may be sufficient, but a fibrous thing and a secondary processed product may be used. By using a fibrous material, not only is it difficult for water to pass through and clogging, but because the fibers are stacked alternately in the vertical and horizontal directions, it is efficient because water passes uniformly and there is little loss of water pressure. .
  In addition, since the secondary processed product processed into a filter shape or a cartridge shape is easy to handle and can be easily attached to and detached from the activated carbon storage tube, it can be used more suitably.
  By providing detachable mesh-like lids at both ends of the activated carbon storage tube, the activated carbon in the activated carbon storage tube can be easily replaced and held. Further, since the activated carbon storage pipe is detachably disposed in the middle of the pipeline by a method such as screwing, the entire activated carbon storage pipe in which the activated carbon is previously stored may be replaced.
[0011]
  The outdoor heat exchanger according to claim 2 of the present invention is(A)On one or both sidesPrinted layer or coatingA plurality of heat transfer fins made of aluminum or aluminum alloy on which a coating layer is formedOutdoor heat exchanger body withWhen,(B)A water spray pipe disposed opposite to the heat transfer fin and having one or more water spray holes for dripping water onto the heat transfer fin, and a water supply pipe connected to the water spray pipe.An activated carbon storage pipe detachably disposed in the middle of the pipe of the water supply pipe, and a water drop dropping pipe for dropping water from the front of the outdoor heat exchanger bodyIt has the structure provided with.
  With this configuration, in addition to the operation obtained in the first aspect, the following operation can be obtained.
(1) With a simple configuration in which watering holes are drilled in the watering pipe and water is dropped on the heat transfer fins, the cooling efficiency can be increased by utilizing the latent heat of water evaporation.
(2) Since water is dripped, it is less susceptible to wind and the like than spraying, and the heat transfer fins can be wetted more reliably, and the cooling efficiency can be increased by utilizing the latent heat of water evaporation.
  Here, as the water spray pipe, a pipe made of synthetic resin or copper, stainless steel, brass or the like can be used. A watering hole having a diameter of about 0.5 mm to 2.5 mm, preferably about 0.5 mm to 1.0 mm is drilled in this. If the diameter of the sprinkling hole is smaller than 0.5 mm, the amount of water is small and the entire fin cannot be wetted, so that sufficient latent heat of vaporization cannot be used. As the diameter becomes larger than 1.0 mm, the amount of water is too large. The utilization efficiency of latent heat of vaporization is lowered, and there is a tendency that a sufficient effect cannot be obtained.
  Outdoor heat exchangerBodyIf there are many units and refrigerant pipes are concentrated, sprinkling holes may be formed in the water supply pipes or water pipes branched in the middle of the water supply pipes to sprinkle the refrigerant pipes to reduce the heat quantity of the refrigerant. Good. Thereby, cooling efficiency can be improved.
[0013]
  Of the present inventionClaim 3The outdoor heat exchanger described inClaim 1 or 2It has the structure by which the surface layer containing a photocatalytic oxide and a silicone resin or a silica is formed in the surface of the said adherence layer.
  With this configuration,Claim 1 or 2In addition to the above action, it has the following action.
(1) The photocatalytic action of the photocatalytic oxide makes the surface of the heat transfer fin hydrophilic by making the silicone resin or silica hydrophilic, making it difficult to attach dirt such as smoke in the atmosphere containing a large amount of hydrophobic components. The adhered dirt can be easily removed.
  Here, the amount of the photocatalytic oxide in the surface layer is preferably about 10 to 80% by weight, and more preferably about 20 to 50% by weight. When the surface of the heat transfer fin is irradiated with light, hydrophilicity is imparted to silicone and silica by the action of the photocatalytic oxide present in the surface layer, and this hydrophilicity lasts as long as the light irradiation is continued. Furthermore, even if light irradiation is stopped once, when light is irradiated again, hydrophilicity is imparted again. In addition, since the photocatalytic oxide decomposes contaminants, the surface of the heat transfer fin can be prevented from being soiled and kept clean.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, an outdoor heat exchanger according to an embodiment of the present invention will be described with reference to the drawings.
(Embodiment 1)
  FIG. 1A is a partially broken overall perspective view of an outdoor heat exchanger according to Embodiment 1 of the present invention, and FIG. 1B is an enlarged view of a portion A in FIG.
  In FIG. 1 (a), reference numeral 1 denotes an outdoor heat exchanger according to Embodiment 1 of the present invention.Outdoor heat exchanger body1a is a water droplet spraying pipe, 2 is an outdoor heat exchangerBody1 is a heat transfer fin in which a copper hairpin tube is fitted into the opening and a large number of the hairpin tubes are arranged side by side, and an adherence layer such as a printing or coating film is formed on the surface thereof; 3 is a copper hairpin tube; 3a is a copper bend 4 is a nozzle portion in which a spray nozzle is perforated, 5 is a water pipe, 6 is an electromagnetic valve, 7 is branched, 8 is a synthetic resin water supply pipe, and 9 is disposed between the water supply water supply pipes 8 and 8. The activated carbon storage pipes 9a and 9b for removing chlorine ions in the provided tap water are activated carbon storage pipe connection portions.
  In FIG. 1B, the heat transfer fin 2 has an adhesion layer 2b formed by printing or painting of white or silver having a thickness of about 0.05 μm to 20 μm on both surfaces of the aluminum plate 2a.
Outdoor heat exchangerBody1 is formed of a heat transfer fin 2, a hairpin tube 3 having a diameter of 9 mm to 20 mm, and a bend 3a. .
  The water flowing through the water droplet spraying pipe 1a reaches the nozzle part 4 in which the spray nozzle is drilled from the upstream side through the water supply pipe 8, the activated carbon storage pipe 9, the branch 7, and the water pipe 5 as indicated by an arrow. By opening the electromagnetic valve 6, water is sprayed from the spray nozzle to the heat transfer fin 2 and the hairpin tube 3. The activated carbon storage tube 9 is detachably disposed with respect to the water supply tube 8 by the activated carbon storage tube connection portions 9a and 9b, and removes chlorine from the tap water with activated carbon (not shown) stored therein.
  Next, the activated carbon storage tube 9 will be described.
  FIG. 2 is an exploded perspective view of the water droplet spraying pipe according to Embodiment 1 of the present invention.
  In FIG. 2, 9 is an activated carbon storage tube, 10 is a lid that is detachably screwed to both ends of the activated carbon storage tube 9, 10a is a lid screwed portion, and 10b is an activated carbon storage tube connecting portion 9a, 9b. The connecting screwing portions 10c to be screwed are mesh portions disposed on the end face of the lid body 10. Since the lid 10 is detachably screwed to both ends of the activated carbon storage tube 9, the activated carbon can be easily replaced. Moreover, since it has the mesh part 10c in the end surface of the cover body 10, even when granular activated carbon is used, activated carbon does not flow out from the activated carbon storage tube 9. The mesh portion 10c may be at least downstream.
  In addition to the effect of latent heat of evaporation, spraying water droplets is an outdoor heat exchanger.BodyThe cooling efficiency can be expected to be improved by lowering the ambient temperature of the building.BodyThe temperature rise in the place where refrigerant piping is concentrated can be reduced.
[0016]
Since the outdoor heat exchanger in Embodiment 1 is configured as described above, it has the following effects.
(1) By having an adhesion layer on the surface of the heat transfer fin, corrosion due to acid rain or the like can be prevented and durability can be improved without deteriorating heat conduction.
(2) Since corrosion of the heat transfer fin surface is prevented, even if dust or dust adheres to the heat transfer fin, the performance is maintained by simply removing dust and dust by washing with rainwater or tap water from the spray nozzle. be able to.
(3) By having an adhesion layer on the surface of the heat transfer fin, corrosion by chlorine contained in tap water does not occur even when washed with tap water, and the heat transfer fin can be kept clean. It is possible to prevent clogging between the fins and hinder heat dissipation, thereby preventing a decrease in thermal efficiency.
(4) Even if it is installed on a veranda or a rooftop of a building, etc., and is exposed to sunlight, rain, exhaust gas, etc., it has an adherent layer, so durability can be maintained.
(5) Since the adherence layer of the heat transfer fin is formed by printing or a coating film, the manufacturing process is simple, the yield is good, and mass production can be performed uniformly.
(6) Outdoor heat exchangerBodyBy spraying water droplets from the front and wetting the heat transfer fins and the hairpin tube, it is possible to increase the cooling efficiency by utilizing the latent heat of vaporization of water.
(7) Since the temperature of the outside air is lowered by spraying water, the cooling efficiency can be increased, and the outdoor heat exchanger that is concentrated in the building or the likeBodyA rise in ambient temperature can also be reduced.
(8) Since it has an activated carbon storage pipe in the middle of the pipe of the water supply pipe, chlorine contained in tap water can be removed, salt corrosion of fins is prevented, durability is improved, secular change is small, and long-term Performance can be maintained over time.
(9) Since the activated carbon storage tube is detachable, the activated carbon can be easily replaced, and the chlorine removal effect can be maintained.
[0017]
(Embodiment 2)
  FIG. 3A is an overall perspective view of the outdoor heat exchanger according to Embodiment 1 of the present invention, and FIG. 3B is an enlarged view of a portion A in FIG.
  In addition, the same code | symbol is attached | subjected to the thing similar to Embodiment 1, and description is abbreviate | omitted.
  In FIG. 3A, 11 is an outdoor heat exchanger according to Embodiment 2 of the present invention.Outdoor heat exchanger body, 11a is a water drop dropping pipe, 12 is a heat transfer fin in which an adherence layer such as printing or a coating film is formed and laminated in the vertical direction, 13 is a copper hairpin tube, 14 is a synthetic resin or metal sprinkling pipe , 15 is a water spray hole having a diameter of about 0.5 mm to 1.0 mm formed on the opposite side of the heat transfer fin 12 of the water spray pipe 14, and 16 is a faucet valve.
  In FIG. 3B, the heat transfer fin 12 is formed with an adhesion layer 12b having a thickness of about 0.05 μm to 20 μm on the upper surface of the aluminum plate 12a.
  The water flowing through the water droplet dropping pipe 11a reaches the water sprinkling hole 15 formed in the water sprinkling pipe 14 from the upstream side through the water supply pipe 8, the activated carbon storage pipe 9, the branch 7, and the water sprinkling pipe 14 as shown by an arrow. . By opening the valve 16, water is dripped from the water spray holes 15 to the heat transfer fins 12.
[0018]
As described above, the outdoor heat exchanger in the second embodiment is configured, and thus has the following action in addition to the first embodiment.
(1) With a simple configuration in which watering holes are drilled in the watering pipe and water is dropped on the heat transfer fins, the cooling efficiency can be increased by utilizing the latent heat of water evaporation.
(2) Since water is dripped, it is less susceptible to wind and the like than spraying, and the heat transfer fins can be wetted more reliably, and the cooling efficiency can be increased by utilizing the latent heat of water evaporation.
[0019]
【Example】
Examples of the present invention will be described below.
Example 1
  Prepare 10 aluminum plates cut into 2cm wide and 8cm long aluminum cans with printed layer on the surface, open holes for hairpin tube 3, and outdoor heat exchanger at 10 locationsBodyAttached to.
  When watering pipes containing activated carbon are placed in the middle of the pipe so that they face the heat transfer fins, and water is continuously sprinkled with tap water from which chlorine has been removed, no corrosion will occur even after 5 years. I understood.
  It was also found that no corrosion occurred even after 10 years in normal use.
(Example 2)
  Home cooler outdoor heat exchangerBodyA heat transfer fin with a silver coating formed by spraying and five aluminum plates of the same size as in Example 1 were used as outdoor heat exchangers.BodyIn addition to the one attached to, the water from which chlorine was removed was sprayed through a pipe line containing bag-like activated carbon.
  After 1 year, no corrosion occurred in either, and after 2 years, some corrosion occurred on the silver coating film, but no corrosion occurred on the aluminum plate with the printed layer.
  In addition, bag-like activated carbon was easy to purchase and handle and could be easily replaced.
(Comparative example)
  When an aluminum plate without printing or coating was used as heat transfer fins and operated under the same conditions, black spots occurred in about 3 months, and clogging between heat transfer fins occurred in about 3 years, resulting in a decrease in thermal efficiency. . In addition, what was installed near the coast was corroded in about 6 years.
(Example 3)
  FIG. 4 shows an outdoor heat exchanger in Example 3.BodyAnd the whole top view which shows arrangement | positioning of piping for water droplet spraying is shown.
  In the figure, 21 is an outdoor heat exchanger arranged on the rooftop.Body, 21a is a fan, and 22 is a water droplet spraying pipe. Outdoor heat exchangerBody21 are each connected to an air-cooled refrigerator having an output of about 3.75 to 15 kw, and an outdoor heat exchangerBodyA hairpin tube 21 (not shown) is connected to a refrigerant pipe (not shown).
  Spray heat spray fins on aluminum heat transfer fins 3 times, these outdoor heat exchangersBodyOn the other hand, water from which chlorine was removed was sprayed with activated carbon stored in a pipe having a diameter of about 100 mm and a length of about 600 mm.
  As a result, it was found that about 40,000 kw per month can be saved as power consumption and about 400,000 kw per year, and about 10 million yen can be saved as electricity bill.
  One year after inspection, it was found that the aluminum heat transfer fins were not corroded, and that the activated carbon worked effectively for two years.
[0020]
【The invention's effect】
  As described above, according to the outdoor heat exchanger of the present invention, the following advantageous effects can be obtained.
  According to invention of Claim 1, it has the following effects.
(1) To provide an outdoor heat exchanger with excellent reliability and durability that can prevent corrosion due to acid rain and the like and improve durability without deteriorating heat conduction by having an adhesion layer on the surface of the heat transfer fin. be able to.
(2) Since corrosion of the heat transfer fin surface is prevented, even if dust or dust adheres to the heat transfer fin, the performance is maintained by simply removing dust and dust by washing with rainwater or tap water from the spray nozzle. It is possible to provide an outdoor heat exchanger with excellent reliability and maintainability.
(3) By having an adhesion layer on the surface of the heat transfer fin, corrosion by chlorine contained in tap water does not occur even when washed with tap water, and the heat transfer fin can be kept clean. It is possible to provide an outdoor heat exchanger with excellent reliability and maintainability that can prevent the heat radiation from being blocked due to clogging between the fins and prevent a decrease in thermal efficiency.
(4) It is installed on a veranda or rooftop of a building, etc., and has an adherent layer even when exposed to sunlight, rain, exhaust gas, etc., so it has excellent reliability and durability that can maintain durability. An outdoor heat exchanger can be provided.
(5) Outdoor heat exchangerBodyBy spraying water droplets from the front and wetting the heat transfer fins and the hairpin tube, it is possible to provide an outdoor heat exchanger excellent in energy saving that can improve the cooling efficiency by utilizing the latent heat of evaporation of water.
(6) Outdoor heat exchangerBodyBy having an adhesion layer on the surface of the heat transfer fins, corrosion of fins due to chlorine contained in tap water does not occur even when tap water is sprayed, so it is easy to add a spray nozzle connected to the tap water. It is possible to provide an outdoor heat exchanger that can improve cooling efficiency and is excellent in reliability and energy saving.
(7) Outdoor heat exchanger using rainwater or water sprayed from spray nozzleBodyCan be cleaned of outdoor heat exchangerBodyIt is possible to provide an outdoor heat exchanger that can maintain the performance of the present invention and is excellent in reliability and maintainability.
(8) Since the temperature of the outside air is lowered by spraying water, it is possible to provide an outdoor heat exchanger excellent in energy saving that can improve the cooling efficiency.
(9) By forming the adherent layer by printing, the manufacturing process is simple, the yield is good, and mass production can be performed uniformly.
(10) When an epoxy one-component heat curing ink is used as the thermosetting (baking and drying) ink, it is excellent in workability and adherence strength, so secondary processing such as pressing and bending. Even if it performs, a favorable deposit layer can be formed.
(11) When a coating film is formed as the adherent layer, it can be easily applied at low cost by using a spray type.
(12) In both cases of printing and coating, by making the color white or silver, it is difficult to absorb light or heat, so that the heat dissipation efficiency is improved and the appearance of the apparatus can be matched.
(13) Since it has an activated carbon storage pipe in the middle of the pipe of the water supply pipe, chlorine contained in tap water can be removed, salt corrosion of fins is prevented, durability is improved, secular change is small, and long-term It is possible to provide an outdoor heat exchanger excellent in reliability and durability capable of maintaining performance over a wide range.
(14) Since the activated carbon storage tube is detachable, it is possible to provide an outdoor heat exchanger that can easily replace the activated carbon and maintain the chlorine removal effect and is excellent in reliability and maintainability.
[0021]
  According to invention of Claim 2, in addition to the effect of Claim 1, it has the following effects.
(1) Outdoor heat that excels in workability and energy saving, which can increase the cooling efficiency by using the latent heat of water evaporation, with a simple configuration of perforating holes in the water spray pipe and dropping water into the heat transfer fins. An exchanger can be provided.
(2) Since water is dripped, compared to spraying, it is less susceptible to wind and other factors, so that heat transfer fins can be wetted more reliably and the cooling efficiency can be improved by using the latent heat of water evaporation. It is possible to provide an outdoor heat exchanger that is excellent in performance.
[0023]
  Claim 3According to the invention described inClaim 1 or 2In addition to the above effects, the following effects are obtained.
(1) The photocatalytic action of the photocatalytic oxide makes the surface of the heat transfer fin hydrophilic by making the silicone resin or silica hydrophilic, making it difficult to attach dirt such as smoke in the atmosphere containing a large amount of hydrophobic components. The adhered dirt can be easily removed.
[0025]
[Brief description of the drawings]
FIG. 1 (a) is a partially broken overall perspective view of an outdoor heat exchanger according to Embodiment 1 of the present invention.
(B) Enlarged view of part A in FIG.
FIG. 2 is an exploded perspective view of a water droplet spray pipe according to Embodiment 1 of the present invention.
3A is an overall perspective view of an outdoor heat exchanger according to Embodiment 2 of the present invention. FIG.
(B) Enlarged view of part B in FIG.
FIG. 4 shows an outdoor heat exchanger in Example 4BodyAnd overall plan view showing the arrangement of piping for water droplet spraying
[Explanation of symbols]
1 Outdoor heat exchangerBody
1a Piping for water droplet spraying
2 Heat transfer fins
2a Aluminum plate
2b Adhering layer
3 Hairpin tubes
3a bend
4 Nozzle part
5 water pipe
6 Solenoid valve
7 branch
8 Water supply pipe
9 Activated carbon storage tube
9a, 9b Activated carbon storage pipe connection
10 Lid
10a Lid screw part
10b Connection threaded part
10c mesh part
11 Outdoor heat exchangerBody
11a Water drop dripping piping
12 Heat transfer fins
12a Aluminum plate
12b Deposited layer
13 Hairpin tube
14 Watering pipe
15 Watering hole
16 Faucet valve
21 Outdoor heat exchangerBody
21a fan
22 Water droplet spray piping

Claims (3)

(A) an outdoor heat exchanger body having a plurality of heat transfer fins made of aluminum or aluminum alloy, on which one or both surfaces are formed with a printed layer or a coating layer , (b) arrangement of the heat transfer fins A nozzle part disposed opposite to the part and provided with a spray nozzle, a water pipe for supplying water to the nozzle part, a water pipe connected to the water pipe, and in the middle of the pipe of the water pipe An outdoor heat exchanger, comprising: an activated carbon storage pipe detachably disposed; and a water droplet spraying pipe for spraying water droplets from the front surface of the outdoor heat exchanger main body . (A) an outdoor heat exchanger body having a plurality of heat transfer fins made of aluminum or aluminum alloy, on which one or both surfaces are formed with a printed layer or a coating layer , (b) arrangement of the heat transfer fins A water spray pipe which is arranged opposite to the section and has one or more water spray holes for dropping water on the heat transfer fins, a water supply pipe connected to the water spray pipe, and an attachment / detachment in the middle of the water supply pipe An outdoor heat exchanger comprising: an activated carbon storage pipe disposed freely, and a water droplet dropping pipe for dropping water from the front surface of the outdoor heat exchanger main body . The outdoor heat exchanger according to claim 1 or 2 , wherein a surface layer containing a photocatalytic oxide and a silicone resin or silica is formed on a surface of the deposition layer.

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