JP2006125775A - Auxiliary cooling device for cooling air - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary cooling device for cooling air allowing improvement of cooling efficiency of a heat radiation fin of an air-cooled condenser in time of a high temperature such as in summertime, not generating reduction of heat exchange efficiency in time of air cooling operation, corrosion on the heat radiation fin, or the like without adhesion of a mineral deposit and scale or the like on the heat radiation fin surface. <P>SOLUTION: In this auxiliary cooling device for the cooling air, a cooling mat 21 is installed near the heat radiation fin of the condenser apart from the heat radiation fin at a prescribed distance, and a cooling water is made to flow down through the cooling mat 21 to cool intake air of the condenser. In the auxiliary cooling device, a sprinkling bucket 22 is installed in an upper part of the cooling mat 21, a plurality of cooling water outflow holes 43 are horizontally bored inside it, the cooling water flowing out from the cooling water outflow openings 43 is struck against an inner wall face 22W of the sprinkling bucket 22, is vertically and horizontally splashed, and is made to flow down to the upper part of the cooling mat 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an auxiliary cooling device for cooling air that cools intake air for cooling the condenser when the temperature is high in a condenser that is a cooling target used in an air conditioning / freezing / refrigeration apparatus or the like.

  Condensers used in refrigeration cycles such as air conditioning, refrigeration, and refrigeration devices are classified into a water cooling type and an air cooling type by a heat exchange method. The water-cooled type has high heat exchange efficiency and can maintain a stable indoor / indoor temperature even at high temperatures in summer, but the structure of the apparatus is complicated and expensive. In addition, the air-cooled type is inexpensive because it has a simple device structure, but it has a drawback that the cooling efficiency in the interior and the room decreases at high temperatures in summer. As an auxiliary cooling device for an air-cooled condenser that compensates for this drawback, an auxiliary cooling device is known that sprays water directly on the heat dissipating fins to improve cooling efficiency (see, for example, Patent Document 1).

  In this known technology, the auxiliary cooling device has a spray nozzle part that sprays fine granular or mist water almost uniformly on the heat dissipating fins of the condenser of the air conditioner outdoor unit, and a control part that operates and stops the nozzle part. For example, when the outside air temperature reaches a high temperature of about 35 ° C. when the compressor is in operation, drain water does not come out from each spray nozzle part with respect to the raised heat dissipation fins The amount of water is adjusted and water is sprayed, and the radiation fins provided in the refrigerant pipe are cooled by the latent heat of evaporation of the sprayed water. The spray nozzle part is supported by the protective frame and is supplied with cooling water by the water supply pipe 8.

  However, the above-mentioned auxiliary water cooling type direct cooling device for heat radiation fins improves the cooling efficiency by spraying tap water directly with the nozzles on the heat radiation fins of the condenser at high temperatures such as in summer. Because it operates as a conventional air cooling device and scales, scales, etc. adhere to the surface of the radiating fins while the operation is continued for a long period of time, the heat exchange efficiency decreases during the air cooling operation and the radiating fins corrode. There were problems such as.

In order to solve such a problem, the applicant of the present application has installed a cooling mat 21 in the vicinity of the heat radiating fins of the condenser 2 as shown in FIGS. A water sprinkle 22 is provided in the upper part of the mat 21, a drainage spit 23 and a water storage tank 25 are provided in the lower part, a pump 26 and a pipe 24 for circulating cooling water are provided between the water sprinkle 22 and the water storage tank 25, and the cooling mat 21 The auxiliary cooling device 20 for the condenser has been proposed in which the cooling water is caused to flow from the upper part to hold the cooling water in the cooling mat and the intake air of the condenser is cooled via the cooling mat (for example, Patent Document 2). 6 and 7, 3 is a cooling fan, 25 is a water storage tank, 27 is a support section, 30 is a water supply device, 31 is a water supply pipe, and 32 is an electromagnetic valve.
JP-A-10-213361 Japanese Patent Laid-Open No. 2004-3806

  The auxiliary cooling device 20 for cooling air shown in the above cited reference 2 can improve the cooling capacity of the condenser 2 that is a cooling means, and is indirect cooling, so that corrosion and scale of the radiating fins due to cooling water are reduced. It has an excellent effect that it can reduce the adhesion of water, can be added to a conventional condenser, can be attached to an existing unit, and can be easily detached and washed. it can. Furthermore, since the cooling mat can use the waste material, it has an excellent effect that it can effectively use resources.

  However, the auxiliary cooling device 20 for the condenser has a plurality of downflow holes provided at intervals on the lower surface of the water sprinkler 22, so that the cooling supplied to the upper end of the cooling mat 21 corresponding to the downflow holes is provided. Water flows down the cooling mat 21 in a comb shape.

  Accordingly, the present invention aims to solve the above-mentioned problems of the prior art, and improves the cooling efficiency of the radiating fins of the air-cooled condenser, which is the cooling means, at high temperatures such as in summer, and at other times It operates as a conventional air cooling device, and scales, scales, etc. do not adhere to the surface of the radiating fins. It is an object to provide an auxiliary cooling device for cooling air with improved efficiency. Another object of the present invention is to obtain an energy saving effect by improving the cooling effect.

  In order to solve the above problems, the following cooling air auxiliary cooling device used in the air-conditioning / refrigeration / refrigeration apparatus according to the present invention employs the following means. That is, the present invention is a cooling air in which a cooling mat made into a mat shape with fibers entangled is arranged in the vicinity of the radiating fin of the cooling means, and cooling water flows down to the cooling mat to cool the intake air of the cooling means. In the auxiliary cooling device, a watering basin having an open bottom is provided at the top of the cooling mat, and a water supply pipe having a plurality of cooling water outflow holes is disposed in the inner space of the watering basin, and the cooling water outflow The holes are arranged close to the inner wall surface of the water sprinkler so that the cooling water discharged from the cooling water outflow hole hits the inner wall surface and is scattered vertically and horizontally.

  Further, in the cooling air auxiliary cooling device, the plurality of cooling water outflow holes are opened toward the cooling air inflow side and substantially in the horizontal direction. Furthermore, in the auxiliary cooling device for cooling air, the cooling mat is arranged at a certain distance from the heat radiating fins of the cooling target means. Further, in the auxiliary cooling device for cooling air, a drainage basin is provided at a lower portion of the cooling mat, and a circulation means for circulating cooling water is provided between the drainage basin and the water sprinkler.

  According to the present invention, a cooling mat is installed in the vicinity of the heat radiating fin of the condenser as an auxiliary cooling device for the cooling air of the condenser as the cooling means, and water is supplied to the cooling air inflow side of the cooling mat. It is possible to improve the condensing capacity of the condenser by cooling down the suction air of the condenser by flowing down on a uniform surface. Moreover, since it is indirect cooling, there is no worry of corrosion and scale adhesion due to cooling water of the radiation fins. In addition, since the cooling air auxiliary cooling device can be added to a conventional condenser, it can be attached to an existing unit, and can be easily attached / detached and cleaned. In addition, since the cooling mat can also use waste materials, it can also effectively use resources.

  The air conditioning / cooling / refrigeration apparatus to which the auxiliary cooling apparatus of the present invention is applied has the structure shown in FIG. That is, in the refrigeration cycle shown in FIG. 4, the compressor 11, the condenser 2, the dryer 14, the expansion valve 13, and the evaporator 12 are connected by the refrigerant pipe 7 so as to constitute the refrigeration cycle 10. In the same figure, although the structure of a water supply / drainage apparatus differs from embodiment shown in FIGS. 1-3, the same code | symbol is attached | subjected to the other same part and description is abbreviate | omitted. In FIG. 4, the water supply device 30 includes, for example, a water supply pipe 31 that communicates with a water pipe, an electromagnetic valve 32 that is interposed in the water supply pipe 31 and serves as an on-off valve for shutting off or passing the tap water, A thermostat 33 that controls the opening and closing of the solenoid valve 32 and a sensor 34 that measures the temperature of the air flowing into the auxiliary cooling device 20 to operate the thermostat 33 are provided.

  An auxiliary cooling device 20 is provided in the vicinity of a condenser constituting a conventionally known refrigeration cycle (not shown), that is, at a position away from the cooling fan 3 attached to the condenser 2 in FIG. The auxiliary cooling device 20 falls from the cooling mat 21 as shown in FIG. 6 or 7, a mat-like cooling mat 21, a water sprinkler 22 for spraying cooling water onto the cooling mat 21 from above, and the cooling mat 21. A drainage basin 23 for receiving cooling water, a water storage tank 25 for storing the cooling water from the drainage basin 23, a circulation pipe 24 including a pump 26 for returning the cooling water of the water storage tank 25 to the water supply pipe 31 side, And a water supply device 30 for supplying cooling water to the water supply pipe 31.

  With this configuration, when the sensor 34 senses that the temperature of the inflowing air is equal to or higher than the set value, the thermostat 33 operates and opens and closes the electromagnetic valve 32. When the solenoid valve 32 is opened, tap water is supplied from the water supply pipe 31 to the cooling mat 21 via a water spray pipe (not shown). Moreover, as a drainage means, the drainage tank is not provided and drains directly into the water storage tank 25.

  In addition, although the said refrigerating cycle 10 demonstrated what has arrange | positioned one condenser 2, it arrange | positioned two condensers 2 mirror-symmetrically and the auxiliary | assistant cooling device 20 is also in the air inflow side of each condenser 2. It can also be provided to be symmetrical. Moreover, the combination of the condenser 2 and the auxiliary cooling device 20 may be one set, and a plurality of sets may be arranged in parallel. In the embodiment shown in FIG. 4, the case where tap water is used has been described. However, the present invention is not limited to this, and it is needless to say that drain water generated in the evaporator 12 may be used. That is, drain water is supplied from the drain pan to the water storage tank by a pump.

  The structure of the auxiliary cooling device of the present invention can be the structure shown in FIGS.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view for explaining the shape of the auxiliary cooling device 20 for cooling air according to the present invention, FIG. 2 is a cross-sectional view showing a schematic configuration of the main part thereof, and FIG. 3 is a top view with the lid of the water sprinkler removed. is there.

  In FIG. 1 to FIG. 3, the auxiliary cooling device 20 for cooling air is configured by disposing a water sprinkle 22 at the upper part of a cooling mat 21 and a drainage spear 23 at the lower part. The water sprinkler 22 is configured as, for example, a frame having openings at the top and bottom, and the upper opening is covered with a water sprinkle cover 22L. The left and right wall members of the water sprinkler 22 are connected by a beam 22C. The upper portion of the cooling mat 21 is held in the lower opening of the water sprinkler 22 and the lower portion of the cooling mat 21 is held in the upper opening of the drainage tub 23. A drainage hole 23B is provided on the bottom surface of the drainage basin 23, and the cooling water from the cleaning mat 21 is discharged to the drainage pipe 23A.

  Inside the water sprinkle 22, a water supply pipe 40 having a water supply port 41 at one end and a blind plug 42 at the other end is disposed horizontally and parallel to the wall material on both sides of the water supply 22. The water supply pipe 40 is provided with a plurality of cooling water outflow holes 43 through which the cooling water flows out. The cooling water outflow hole 43 opens toward the inner wall surface 22W of one wall member of the water sprinkler 22. The cooling water supplied to the water supply pipe 40 is directed from the cooling water outflow hole 43 toward the inner wall 22W. The liquid flows out in a substantially horizontal direction, hits the wall surface 22W, disperses vertically and horizontally, and forms fine water droplets that are poured from the opening 22K of the water sprinkler 22 into the upper end of the cooling mat 21. By providing the water supply pipe 40 close to the wall surface 22W on the cooling air inflow side passing through the cooling mat, the cooling water flows down toward the cooling air inflow side of the cooling mat. Therefore, the cooling air passing through the cooling mat 21 is efficiently cooled by the heat of vaporization, so that a large amount of cooling water is not held on the cooling air suction side of the cooling mat 21, and water droplets of cooling water are generated in the condenser 2. It is possible to prevent scattering.

  The cooling mat 21 is installed in order to prevent the cooling water from splashing as it falls and flowing along with the air sucked by the cooling fan 3, and as a property of the material of the cooling mat 21 It is preferable that the air resistance is low when it passes through the air and heat exchange with the falling cooling water is smooth and durable. For example, a non-woven fibrous body is preferable as the mat that allows air to easily pass therethrough. In addition, the cooling mat 21 is preferably used after being entangled with a reprocessed waste plastic that has been reprocessed into a fiber shape from the viewpoint of effective use of resources.

  The shape of the cooling mat 21 is desirably a shape that substantially covers the air suction surface of the condenser 2, and the thickness may be about several centimeters depending on the material and shape. In addition, the cooling mat 21 can be easily installed by selecting a stretchable material. The cooling mat 21 is attached to the condenser 2 by a support portion 27.

As long as the cooling mat 21 is a material in which cooling water is transferred to the outside of the fibrous material, the cooling mat 21 may adopt another form such as a synthetic resin body having open cells. The cooling mat 21 using the fibrous material wets the surface of the fiber with the cooling water and holds the cooling water between the entangled fibers, so that the area where the cooling air contacts the cooling water is increased and the cooling effect is increased. Can be increased. Furthermore, water retention can be improved by spraying a metal oxide having a catalytic action, for example, titanium oxide (TiO ₂ ), on the fibers forming the cooling mat 21 to improve hydrophilicity. When the metal oxide is titanium oxide, it exhibits a cleaning action when exposed to light, so that dirt on the cooling mat can be decomposed and the cleaning interval of the cooling mat can be extended. The metal oxide may be coated in a fiber state, or may be applied by spraying after being formed into a mat shape.

  According to such an embodiment, the cooling water becomes planar from the water sprinkler 22 and flows down through the cooling mat 21, and cools the air passing toward the condenser 2. The cooling water that has cooled the air sucked into the condenser 2 flows down to the water storage tank 25 through the drainage basin 23. The cooling water in the water storage tank 25 is supplied again to the water supply pipe 31 by the water supply device 30 through the circulation water distribution pipe 24 by the pump 26, and after being used for cooling as described above, the water storage tank 25 again passes through the water sprinkler 22. Flow into. The cooling water circulates while cooling the air flowing into the condenser 2 in this way. The water sprinkler 22 and the drain spit 23 may be a sprinkler pipe and a drain pipe, respectively.

  And the water sprinkle 22 is formed so that the cooling water supplied from the water supply pipe 31 of the water supply apparatus 30 may be sprinkled equally on the cooling air inflow side of the upper part of the cooling mat 21. The drainage basin 23 has a bowl-like shape that receives cooling water dripping from the lower portion of the cooling mat 21, and its end is connected to the water storage tank 25. In addition, by adding a Legionella sanitizer (for example, “Kurisawa Pack GR”, trade name of Kurita Kogyo Co., Ltd.) to the water tank 25, it is possible to improve hygiene and the environment. Moreover, a preferable environmental condition can be maintained by exchanging the sterilizing agent about once a month.

  The water temperature of the water storage tank 25 is constantly monitored by a sensor (not shown), and when the temperature exceeds the set temperature, the cooling water of the water storage tank 25 is drained, and at the same time, for example, tap water is newly supplied to the water storage tank 25. You may do it. Further, the cooling water in the water storage tank 25 may be forcibly drained once / day in order to maintain the environmental condition.

  The cooling effect improvement effect and power consumption reduction effect of the cooling air level auxiliary cooling device of the present invention will be described with reference to FIG. FIG. 5A is a diagram for explaining the operation mode of the compressor in the refrigeration cycle, where the vertical axis indicates power consumption for operating the compressor and the horizontal axis indicates the operation time of the compressor. According to the present invention, the case where the cooling air auxiliary cooling device of the present invention is provided on the air suction side of the radiating fin of the cooling target means is indicated by a solid line, and the case where the cooling air auxiliary cooling device of the present invention is not provided is indicated by a broken line. For example, the high-pressure pressure is reduced, and thereby both energy saving effects such as improvement in cooling capacity (cooling capacity) and reduction in power consumption can be obtained.

  In order to reduce the amount of cooling water without reducing the cooling effect of the cooling air, instead of continuous water supply as shown in the upper part of FIG. 5B, as shown in the lower part of FIG. Water can be supplied by intermittent control that repeats water supply and stoppage at intervals of several seconds to several tens of seconds.

Sectional drawing explaining the structure of the auxiliary cooling device of the cooling air concerning this invention. Sectional drawing explaining the structure of the principal part of the auxiliary cooling device of the cooling air shown in FIG. The top view explaining the structure of the principal part of the auxiliary cooling device of the cooling air shown in FIG. The figure explaining the refrigerating cycle incorporating the auxiliary cooling device of the cooling air concerning the present invention. The figure explaining the energy saving effect of the auxiliary cooling device of the cooling air concerning this invention, and the aspect of water supply of cooling water. Sectional shape figure explaining the structure of the auxiliary cooling device of the cooling air concerning a previous application. The front view which shows schematic structure of the principal part of the auxiliary cooling device of the cooling air of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Condenser, 2a ... Side wall, 3 ... Cooling fan, 5 ... Radiation fin, 7 ... Refrigerant pipe, 10 ... Refrigerating cycle, 11 ... Compressor, 12 ... Evaporator, 13 ... Expansion valve, 14 ... Dryer, 20 ... Auxiliary Cooling device, 21 ... Cooling mat, 22 ... Water sprinkler, 22C ... Beam, 22K ... Sprinkler spear opening, 22L ... Sprinkler spear lid, 22W ... Sprinkler spear inner wall surface, 23 ... Drain spit, 23A ... Drain pipe, 23B ... Drain hole , 24 ... piping for circulation, 25 ... water storage tank, 26 ... pump, 27 ... support part, 30 ... water supply device, 31 ... water supply pipe, 32 ... electromagnetic valve, 33 ... thermostat, 34 ... sensor, 40 ... water supply pipe, 41 ... water supply port, 42 ... blind plug, 43 ... cooling water outflow hole

Claims (6)

In an auxiliary cooling device for cooling air, a cooling mat that is entangled with fibers and arranged in the vicinity of the heat dissipating fin of the cooling means, and cooling water flows down to the cooling mat to cool the intake air of the cooling means.
A watering basin having an open bottom is provided at the top of the cooling mat, a water supply pipe having a plurality of cooling water outflow holes is disposed in the inner space of the watering basin, and the cooling water outflow holes are formed in the watering basin. An auxiliary cooling device for cooling air, wherein the cooling water discharged from the cooling water outflow hole hits the inner wall surface so as to collide with the inner wall surface and to be scattered vertically and horizontally.   The auxiliary cooling device for cooling air according to claim 1, wherein the plurality of cooling water outflow holes are open toward a cooling air inflow side and in a substantially horizontal direction.   The auxiliary cooling device for cooling air according to claim 1, wherein the cooling mat is arranged at a certain distance from the heat dissipating fins of the means to be cooled.   The auxiliary cooling device for cooling air according to any one of claims 1 to 3, wherein the water supply is intermittent water supply for several seconds to several tens of seconds in order to reduce the amount of water used.   The auxiliary cooling device for cooling air according to any one of claims 1 to 4, wherein a metal oxide is applied to the surface of the cooling mat for the purpose of water retention in order to improve cooling efficiency.   The drainage basin is provided in the lower part of the cooling mat to reduce the amount of water used, and a circulation means for circulating cooling water is provided between the drainage basin and the watering basin. The auxiliary cooling device for cooling air according to claim 5.

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