JP2008128500A - Condenser using fine mist and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a condenser using fine mist and its control method capable of preventing attachment of oxide and dust to a heat exchanger, and coping with a peak load by temporarily improving cooling efficiency. <P>SOLUTION: An outdoor unit 10 as the condenser comprises the heat exchanger 32 in which a heat medium flows in a cooling tube 38, and a fan 34 for distributing the air to the outside of the cooling tube 38, and a fine mist generating nozzle 46 generating fine mist of particle size of 10 μm or finer by simultaneously injecting the air and water, is disposed at a position separating from the heat exchanger 32 at an upstream side of the heat exchanger 32 with respect to the flow of the air by the fan 34. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a condenser using fine mist and a control method thereof, and more particularly to a condenser using fine mist used in an air conditioning system such as a building facility and a control method thereof.

  In recent years, chillers (coolers) having air-cooled condensers and outdoor units for commercial packages are frequently used in building facilities and the like. The air-cooled condenser is composed of a heat exchanger with heat radiation fins through which a heat medium (refrigerant) flows and a fan that sends air to the outside of the heat exchanger, and flows inside the heat exchanger. The heat medium is cooled by releasing heat to the outside air.

  By the way, the maximum capacity of an air conditioning system such as a building facility is generally set based on a peak load. That is, the load varies greatly depending on the outside air temperature and the like, but the maximum capacity of the air conditioning system is set so as to be able to cope with the highest value (peak load).

  However, the peak load is reached for about 10 to 20 hours per year, and an air conditioning system with a large capacity is installed unnecessarily during those hours.

From the viewpoint of energy saving with respect to such problems, products having a function of spraying water have been developed as means for recovering the performance degradation that occurs when the outdoor temperature in summer increases. For example, Patent Document 1 describes that water is sprayed on the heat dissipating fins of an air-cooled condenser and the heat dissipating fins are wetted to cool the heat dissipating fins with the latent heat of vaporization of the water. Furthermore, Patent Document 2 describes that a potential difference is generated between the spraying means and the heat exchanging unit so that the sprayed liquid enemy is reliably attached to the radiation fin. According to these Patent Documents 1 and 2, the heat transfer coefficient on the surface of the radiating fin can be improved, and as a result, the cooling effect can be improved.
Japanese Patent No. 3707737 JP 2005-214578 A

  However, such a water spraying method has a problem that a large amount of water must be sprayed, and the water transports oxides (such as Sox) and dust in the air to corrode the fin surface. There has been a problem that oxides and dust accumulate on the fin surface and impair the cooling efficiency during air cooling.

  The present invention has been made in view of such circumstances, and can prevent oxides and dust from adhering to the heat exchanger, and at the peak load by temporarily improving the cooling efficiency. It is an object of the present invention to provide a condenser using a fine mist that can be used and a control method thereof.

  In order to achieve the above object, a condenser according to a first aspect of the present invention includes a heat exchanger in which a heat medium flows in a pipe, and a blower for sending air to the outside of the pipe of the heat exchanger. Fine mist generation that generates fine mist having a particle size of 10 μm or less by simultaneously injecting air and water to a position upstream of the heat exchanger and away from the heat exchanger with respect to the air flow by the blower A nozzle is provided.

  According to the first aspect of the present invention, since the fine mist having a particle size of 10 μm or less is generated on the upstream side of the heat exchanger, the temperature of the air flowing outside the tube of the heat exchanger can be lowered. Thereby, the cooling capacity of the condenser can be temporarily improved, and even if the maximum capacity is set low, the peak load can be dealt with.

  According to a second aspect of the present invention, in the first aspect of the invention, the fine mist ejected from the fine mist generating nozzle evaporates before reaching the heat exchanger.

  According to invention of Claim 2, since it can prevent that a water droplet adheres to a heat exchanger, the corrosion of a heat exchanger and the fall of thermal efficiency can be prevented.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the blower is provided on the upstream side of the heat exchanger with respect to the air flow by the blower, and the fine mist is provided on a shaft support member of the blower. A generation nozzle is formed, and the fine mist generation nozzle injects the fine mist in a direction perpendicular to the air flow by the blower.

  According to invention of Claim 3, since the fine mist generating nozzle is formed in the axial support member of an air blower, the space for nozzles is unnecessary and a condenser can be reduced in size. According to the invention of claim 3, since the fine mist is injected in the direction orthogonal to the air flow by the blower, the fine mist is easily mixed with the air and evaporated. Therefore, the distance between the fine mist generating nozzle and the heat exchanger can be narrowed to reduce the size of the condenser.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the diffusion direction of the fine mist determined by the injection speed from the fine mist generating nozzle and the air flow speed by the blower is the entire heat exchanger. It is set so that it may cover.

  According to the invention of claim 4, since the fine mist diffuses widely so as to cover the entire heat exchanger, the entire air passing through the heat exchanger can be cooled by the latent heat of vaporization of the fine mist, and the heat exchanger Performance can be improved. The diffusion direction of the fine mist is obtained by synthesizing the injection velocity vector of the fine mist and the air flow velocity vector, and the resultant vector indicates the outer edge of the heat exchanger or the outside of the heat exchanger. It is preferable to set to.

  According to a fifth aspect of the present invention, in the first or second aspect of the present invention, the blower is provided on the upstream side of the heat exchanger with respect to the air flow by the blower, and the fine mist is provided on a shaft support member of the blower. A generation nozzle is formed, and the fine mist generation nozzle injects the fine mist in the air flow direction by the blower.

  According to the invention of claim 5, by diffusing the fine mist in the air flow direction, the fine mist can be ejected without disturbing the air flow.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, there is provided control means for controlling the generation amount of the fine mist according to the temperature of air upstream of the fine mist generation nozzle. It is characterized by having.

  According to the sixth aspect of the present invention, since the amount of fine mist generated is controlled according to the temperature of the air upstream of the nozzle (for example, the outside air temperature), the temperature of the air at the position of the heat exchanger is set to a desired value. (For example, a constant value) can be controlled. Therefore, a stable cooling capacity can be obtained in the condenser.

  According to a seventh aspect of the invention, there is provided the control device according to any one of the first to sixth aspects, further comprising a control means for controlling a blown amount of the blower according to an amount of air injected by the fine mist generating nozzle. Features.

  According to the seventh aspect of the present invention, the amount of air passing through the outside of the heat exchanger can be controlled because the amount of air blown from the blower is controlled according to the amount of air ejected from the nozzle. Therefore, for example, a constant flow rate of air is sent outside the heat exchanger tube to obtain a stable cooling capacity, or the amount of air passing outside the heat exchanger pipe is increased or decreased according to the cooling load. And can be controlled.

  Invention of Claim 8 provides the humidity sensor in front of the said heat exchanger with respect to the flow of the air by the said air blower in any one of Claims 1-7, The measured value of this humidity sensor And a mixing ratio adjusting means for adjusting the mixing ratio of air and water sprayed from the fine mist generating nozzle.

  According to the eighth aspect of the present invention, it is confirmed by the measurement value of the humidity sensor that the fine mist is evaporated, and when the fine mist is not evaporated, the mixing ratio of air and water is adjusted. Thereby, fine mist can be reliably evaporated to the position of a heat exchanger, and it can prevent that the surface of a heat exchanger gets wet.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein a plurality of the heat exchangers are provided in parallel, and an upstream side of each heat exchanger is connected to a mixing box, The fine mist generating nozzle is provided in a mixing box, and air in which the fine mist is mixed inside the mixing box is sent to each heat exchanger.

  According to the invention of claim 9, since air mixed with fine mist in the mixing box is sent to each heat exchanger, it is not necessary to provide fine mist generating nozzles for each heat exchanger. Miniaturization and simplification of management can be achieved.

  In order to achieve the above object, the invention according to claim 10 is a method for controlling a condenser in which a heat medium flowing in a pipe of a heat exchanger is cooled by air sent by a blower outside the pipe of the heat exchanger. When the temperature of the air sent by the blower exceeds a threshold value, air and water are placed at a position upstream of the heat exchanger and away from the heat exchanger with respect to the air flow. It is characterized by generating fine mist having a particle size of 10 μm or less by spraying at the same time.

  According to the invention of claim 10, since the fine mist having a particle size of 10 μm or less is generated on the upstream side of the heat exchanger, the temperature of the air flowing outside the tube of the heat exchanger can be lowered. Thereby, the cooling capacity of the condenser can be temporarily improved, and even if the maximum capacity of the condenser is set low, the peak load can be dealt with.

  The invention according to claim 11 is characterized in that, in the invention according to claim 10, the amount of water to be injected is controlled so that the fine mist evaporates before reaching the heat exchanger.

  According to the eleventh aspect of the present invention, water droplets can be prevented from adhering to the heat exchanger, so that corrosion of the heat exchanger and a decrease in thermal efficiency can be prevented.

  According to a twelfth aspect of the present invention, in the invention of the tenth or eleventh aspect, the generation amount of the fine mist is controlled in accordance with the temperature of the air supplied by the blower.

  According to the twelfth aspect of the invention, since the amount of fine mist generated is controlled according to the air temperature (for example, the outside air temperature), the air temperature at the position of the heat exchanger is set to a desired value (for example, a constant value). ) Can be controlled. Therefore, a stable cooling capacity can be obtained in the heat exchanger.

  A thirteenth aspect of the invention is characterized in that, in the invention according to any one of the tenth to twelfth aspects, the blower amount of the blower is controlled in accordance with the amount of air injected when the fine mist is generated.

  According to the thirteenth aspect of the present invention, since the blower amount of the blower is controlled in accordance with the amount of air injected when the fine mist is generated, the total amount of air passing outside the tube of the heat exchanger can be controlled. Therefore, for example, a constant flow rate of air is sent outside the heat exchanger tube to obtain a stable cooling capacity, or the amount of air passing outside the heat exchanger pipe is increased or decreased according to the cooling load. And can be controlled.

  The invention according to claim 14 is the invention according to any one of claims 10 to 13, wherein the humidity is measured immediately before the heat exchanger, and the fine mist is generated according to the measured value of the humidity. It is characterized by adjusting the mixing ratio of air and water.

  According to the fourteenth aspect of the present invention, it is determined from the measured humidity value whether the fine mist has evaporated, and if it is determined that the fine mist has not evaporated, the mixing ratio of air and water is adjusted. Thereby, fine mist can be reliably evaporated to the position of a heat exchanger, and it can prevent that the surface of a heat exchanger gets wet.

  According to the present invention, since the fine mist having a particle size of 10 μm or less is generated on the upstream side of the heat exchanger, the temperature of the air flowing outside the tube of the heat exchanger can be lowered. Thereby, the cooling capacity of a condenser can be improved temporarily and it can respond to a peak load.

  A preferred embodiment of a condenser using a fine mist and a control method thereof according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a configuration diagram schematically showing an air conditioning system including a condenser using fine mist according to the present invention. As shown in the figure, the air conditioning system includes an indoor unit 12 installed inside the air-conditioned room 14 and an outdoor unit 10 installed outside the air-conditioned room 14 and being an air-cooled condenser. The outdoor unit 10 and the indoor unit 12 are connected by a heat medium (refrigerant) circulation line 16, and the heat medium circulates in the circulation line 16, thereby cooling the heat medium in the outdoor unit 10. In the indoor unit 12, the heat medium takes heat from the air in the air-conditioned room 14, and the air-conditioned room 14 is cooled.

  The indoor unit 12 includes a casing 20, and a circulation line 16 passes through the casing 20, and an expansion valve (not shown) and a heat exchanger 22 are disposed on the circulation line 16. Therefore, the heat medium flowing through the circulation line 16 is evaporated in the pipe of the heat exchanger 22 after the pressure drops after passing through the expansion valve. At that time, heat is removed from the air outside the tube, and the air outside the tube is cooled.

  Further, the indoor unit 12 is provided with a fan 24 inside the casing 20, and by driving the fan 24, air in the air-conditioned room 14 is sucked into the casing 20, and the sucked air is heat exchanger. 22 passes outside the pipe and is supplied to the air-conditioned room 14. At that time, since heat is taken away by the heat medium in the pipe of the heat exchanger 22, the cooled air is supplied to the air-conditioned room 14. Thereby, the air-conditioned room 14 can be cooled to a desired temperature.

  On the other hand, as shown in FIG. 2, the outdoor unit 10 includes a casing 30, and the circulation line 16 passes through the inside of the casing 30. A compressor 36 and a heat exchanger are disposed on the circulation line 16. 32 is provided. Therefore, the heat medium flowing through the circulation line 16 is compressed by the compressor 36 and sent to the heat exchanger 32.

  The heat exchanger 32 includes a plurality of cooling pipes 38 and a plurality of heat radiation fins 40. The plurality of cooling pipes 38 are provided in parallel, and each cooling pipe 38 is connected so that the heat medium flows. The heat radiating fins 40 are formed in a planar shape, and are arranged in a direction orthogonal to the cooling pipe 38 and through the cooling pipe 38. The plurality of radiating fins 40 are arranged in parallel and at regular intervals, and are configured to contact the cooling pipe 38 and efficiently transfer heat.

  A fan 34 is provided inside the casing 30 of the outdoor unit 10. The fan 34 includes a motor 42 and blades 44. When the motor 42 is driven, the blades 44 rotate, and outside air is sucked into the casing 30. The sucked air passes through the outside of the cooling pipe 38 of the heat exchanger 32 and is exhausted to the outside of the casing 30.

  The position of the fan 34 is preferably on the upstream side of the heat exchanger 32 with respect to the direction of air flow generated when the fan 34 is driven, but is not limited to this, and the downstream side of the heat exchanger 32 is not limited thereto. It may be arranged on the side.

  A plurality of fine mist generating nozzles 46 (hereinafter simply referred to as nozzles) are provided between the heat exchanger 32 and the fan 34. The nozzle 46 is a two-fluid nozzle that ejects air and water simultaneously, and an air supply line 48 and a water supply line 50 are connected to the nozzle 46. The nozzle 46 is configured to generate fine mist having a particle size of 10 μm or less by simultaneously jetting air and water. The air supply line 48 and the water supply line 50 are provided with on-off valves 52 and 54, respectively, and by adjusting the opening degree of the on-off valves 52 and 54, the amount of air injected from the nozzle 46 and the amount of water ( That is, the mixing ratio of air and water can be adjusted. The mixing ratio of air and water is preferably 500 to 600 in terms of volume ratio.

  Further, as shown in FIG. 3, the plurality of nozzles 46 are attached to the wall surface of the casing 30 and are arranged to inject toward the center. Further, the plurality of nozzles 46 are arranged at a constant angular interval (for example, 45 ° interval as shown in FIG. 3) so that fine mist can be sprayed from each nozzle 46 evenly. Further, as shown in FIG. 2, the nozzle 46 is disposed so as to inject fine mist in a direction orthogonal to the air flow direction by the fan 34. Thereby, the fine mist sprayed from the nozzle 46 is less likely to adhere to the heat exchanger 32.

  The nozzle 46 is disposed at a predetermined distance L from the heat exchanger 32 so that the fine mist sprayed from the nozzle 46 is surely evaporated before reaching the heat exchanger 32. Is done. Here, the predetermined distance L varies depending on the amount of fine mist generated and the amount of air blown, but is usually preferably 200 to 300 mm.

  The fan 34 and the on-off valves 52 and 54 of the nozzle 46 are connected to a control device 56. The control device 56 is connected to a temperature sensor 58 that measures the outside air temperature, and controls the on-off valves 52 and 54 based on the measured value of the temperature sensor 58. For example, when the outside air temperature exceeds a threshold value (for example, 32 ° C.), the on-off valves 52 and 54 are opened to start generation of fine mist. As a result, only when the outside air temperature becomes high and the load increases, the fine mist can be supplied to improve the cooling performance, and the supply of useless fine mist can be prevented.

  Further, the opening degree of the on-off valve 54 is increased as the outside air temperature rises, and the amount of fine mist generated is increased in proportion to the outside air temperature. As a result, the amount of air temperature drop due to the fine mist increases, so that air having a substantially constant temperature can be passed outside the cooling pipe 38 of the heat exchanger 32.

  The control device 56 is configured to control the rotational speed of the fan 34 in accordance with the opening degree of the on-off valve 52. That is, the amount of air blown by the fan 34 is controlled in accordance with the flow rate of air ejected from the nozzle 46. For example, when the flow rate of air ejected from the nozzle 46 increases (or decreases), the amount of air blown by the fan 34 is decreased (or increased) so that the flow rate of air passing through the heat exchanger 32 is always constant. To. Thereby, since the heat exchange amount by the heat exchanger 32 can be controlled only by the temperature of air, control of cooling performance can be performed easily. Note that the controller 56 may maintain the rotation speed of the fan 34 constant and control the opening degree of the on-off valve 52 according to the measured value of the temperature sensor 58. In other words, the amount of air injected from the nozzle 46 may be controlled in accordance with the cooling load, and the total amount of air sent to the heat exchanger 32 may be controlled.

  The control device 56 is connected to a humidity sensor 60 provided immediately before the heat exchanger 32, and controls the on-off valve 54 based on the measured value of the humidity sensor 60. For example, when it is determined that the humidity measured by the humidity sensor 60 is high and saturated (a state in which fine mist is not evaporated), the opening ratio of the on-off valve 54 is reduced to reduce the water mixing ratio. Reduce the amount of fine mist. Thereby, the fine mist can be reliably evaporated before the fine mist reaches the heat exchanger 32. When the humidity measured by the humidity sensor 60 is low, the opening degree of the on-off valve 54 may be increased to increase the amount of fine mist, thereby improving the cooling efficiency.

  Next, the operation of the air conditioning system configured as described above will be described.

  When the outside air temperature is lower than the threshold value, the heat medium in the cooling pipe 38 of the heat exchanger 32 can be sufficiently cooled by the outside air. Therefore, in this case, the on-off valves 52 and 54 are closed and the fine mist is not sprayed. Thereby, useless supply of fine mist can be prevented.

  When the outside air temperature exceeds the threshold value, the heat medium in the cooling pipe 38 cannot be sufficiently cooled only by the outside air. Therefore, in this case, the on-off valves 52 and 54 are opened, and fine mist having a particle size of 10 μm or less is sprayed from the nozzle 46. A fine mist having a particle size of 10 μm or less has a short time to evaporate and hardly forms water droplets on the wall surface. Therefore, the fine mist sprayed in the air evaporates before reaching the heat exchanger 32, takes away latent heat of evaporation from the air, and lowers the temperature of the air. Thereby, since the temperature of the air which reaches | attains the heat exchanger 32 can be reduced, the heat medium in the cooling pipe 38 of the heat exchanger 32 can be cooled efficiently.

  Thus, according to the present embodiment, since the fine mist is sprayed, the cooling efficiency can be improved without wetting the radiating fins 40 of the heat exchanger 32. Therefore, it is possible to prevent oxides and dust from adhering to the heat radiating fins 40 to corrode the heat radiating fins 40 and to lower the cooling efficiency.

  Further, according to the present embodiment, only when the outside air temperature becomes high, the fine mist is sprayed, and when the outside air temperature is improved, the generation amount of the fine mist is increased. The air passing through the vessel 32 can be controlled to a desired temperature. Therefore, the performance of the heat exchanger 32 can be stabilized regardless of the outside air temperature.

  Furthermore, according to the present embodiment, the air flow rate of the fan 34 is controlled in accordance with the flow rate of air ejected from the nozzle 46, so the flow rate of air passing through the heat exchanger 32 is always kept at a constant value. The cooling performance in the heat exchanger 32 can be stabilized.

  Further, according to the present embodiment, since the flow rate of the fine mist sprayed from the nozzle 46 is controlled in accordance with the humidity of the air immediately before the heat exchanger 32, the fine mist is transferred to the heat exchanger 32. It can evaporate and it can prevent reliably that fine mist adheres to the surface of the heat exchanger 32. FIG.

  FIG. 4 is a cross-sectional view schematically showing the condenser of the second embodiment, and a two-dot chain line indicates an installation range of the heat exchanger 32.

  As shown in the figure, in the second embodiment, a nozzle 46 for generating fine mist is integrated with the fan 34. That is, the fan 34 has a shaft portion 43 that rotatably supports the blades 44, and a plurality of nozzles 46 are formed on the outer peripheral surface of the shaft portion 43. The plurality of nozzles 46 are arranged at regular angular intervals, and are configured such that water and air are supplied to each nozzle 46 so that fine mist can be sprayed evenly. Further, the nozzle 46 is configured to inject fine mist in a direction orthogonal to the direction of the airflow by the fan 34.

  Furthermore, in 2nd Embodiment, it is comprised so that the diffusion direction of the fine mist injected from the nozzle 46 may cover the heat exchanger 32 whole. Here, the diffusion direction of the fine mist is determined by the fine mist injection speed and the air speed by the fan 34. That is, as shown in FIG. 4, when the fine mist injection velocity vector is V1 and the air flow velocity vector is V2, the resultant vector V3 is the diffusion direction, and the diffusion direction is the outer edge or outside of the heat exchanger 32. Set as shown. Thereby, the whole air which passes the heat exchanger 32 can be cooled by the evaporation latent heat of fine mist.

  According to the second embodiment configured as described above, since the fan 34 and the nozzle 46 are integrated, it is not necessary to separately provide an installation space for the nozzle 46, and the apparatus can be miniaturized.

  In the second embodiment described above, the nozzle 46 is formed in the shaft portion 43 that is a fixed portion. However, the nozzle 46 may be formed in a portion that rotates together with the blades 44. In this case, since it becomes easy to stir the fine mist, the cooling effect of the air accompanying the latent heat of vaporization of the fine mist can be improved.

  In the first and second embodiments described above, the fine mist is injected in a direction orthogonal to the air flow direction by the fan 34, but the injection direction of the fine mist is not limited to this. For example, as shown in FIG. 5, fine mist may be injected in parallel with the air flow by the fan 34. Moreover, you may make it inject diagonally with respect to the flow direction of the air by the fan 34, or may combine these several injection directions.

  FIG. 6 schematically shows a condenser according to the third embodiment.

  As shown in the figure, in the third embodiment, a plurality of outdoor units 10, 10... Are provided, and each outdoor unit 10 is provided with a heat exchanger 32 and a fan 34. Each of the plurality of outdoor units 10 is connected to one mixing box 64 through a duct 62, and a nozzle 46 for generating fine mist is provided in the mixing box 64. Therefore, the fine mist sprayed from the nozzle 46 is mixed with air in the mixing box 64. Thereby, the temperature of air can be reduced by the latent heat of vaporization of fine mist, and the temperature of the air sent to each outdoor unit 10 can be reduced.

  According to the third embodiment configured as described above, since the fine mist is sprayed at one place by providing the mixing box 64, it is necessary to provide the nozzle 46 for generating the fine mist in each outdoor unit 10. Disappears. Therefore, a system can be constructed using a conventional outdoor unit that does not have the nozzle 46 for generating fine mist, and the initial cost of the entire air conditioning system can be reduced.

Configuration diagram of an air conditioning system to which a condenser according to the present invention is applied Schematic diagram showing the configuration of the outdoor unit of FIG. Sectional view at the nozzle position in FIG. Sectional drawing which shows the structure of the outdoor unit in 2nd Embodiment Sectional drawing which shows the structure of the outdoor unit of a structure different from FIG. The block diagram which shows the condenser of 3rd Embodiment

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Outdoor unit, 12 ... Indoor unit, 14 ... Air-conditioned room, 16 ... Circulation line, 20 ... Casing, 22 ... Heat exchanger, 24 ... Fan, 30 ... Casing, 32 ... Heat exchanger, 34 ... Fan, 36 ... Compressor 38 ... cooling pipe 40 ... radiation fin 42 ... motor 43 ... shaft portion 44 ... blade 46 ... nozzle 48 ... air supply line 50 ... water supply line 52 ... open / close valve 54 ... open / close Valve, 56 ... Control device, 58 ... Temperature sensor, 60 ... Humidity sensor, 62 ... Duct, 64 ... Mixing box

Claims (14)

In a condenser comprising: a heat exchanger in which a heat medium flows in a pipe; and a blower for sending air to the outside of the pipe of the heat exchanger.
Fine mist generation that generates fine mist having a particle size of 10 μm or less by simultaneously injecting air and water to a position upstream of the heat exchanger and away from the heat exchanger with respect to the air flow by the blower A condenser using fine mist, characterized in that a nozzle is provided.   The condenser using the fine mist according to claim 1, wherein the fine mist sprayed from the fine mist generating nozzle evaporates before reaching the heat exchanger. The blower is provided on the upstream side of the heat exchanger with respect to the air flow by the blower, and the fine mist generating nozzle is formed on a shaft support member of the blower.
The condenser using the fine mist according to claim 1 or 2, wherein the fine mist generating nozzle injects the fine mist in a direction orthogonal to an air flow by the blower.   The diffusion direction of the fine mist obtained by the injection speed from the fine mist generating nozzle and the air flow speed by the blower is set so as to cover the entire heat exchanger. A condenser using the fine mist described in 1. The blower is provided on the upstream side of the heat exchanger with respect to the air flow by the blower, and the fine mist generating nozzle is formed on a shaft support member of the blower.
The condenser using the fine mist according to claim 1 or 2, wherein the fine mist generating nozzle injects the fine mist in a flow direction of air by the blower.   6. The fine mist according to claim 1, further comprising a control unit that controls an amount of the fine mist generated according to a temperature of air upstream of the fine mist generating nozzle. Condenser using.   Condensation using the fine mist according to any one of claims 1 to 6, further comprising control means for controlling the blown amount of the blower according to the amount of air injected by the fine mist generating nozzle. vessel. A humidity sensor is provided immediately before the heat exchanger for air flow by the blower,
The mixing ratio adjusting means for adjusting a mixing ratio of air and water sprayed from the fine mist generating nozzle based on a measured value of the humidity sensor is provided. Condenser using fine mist.   A plurality of the heat exchangers are provided in parallel, the upstream side of each heat exchanger is connected to a mixing box, the fine mist generating nozzle is provided in the mixing box, and the fine mist is mixed inside the mixing box The condenser using the fine mist according to any one of claims 1 to 8, wherein the air is sent to each heat exchanger. In the control method of the condenser that cools the heat medium flowing in the pipe of the heat exchanger with the air sent by the blower outside the pipe of the heat exchanger,
When the temperature of the air supplied by the blower exceeds a threshold value, air and water are simultaneously placed upstream of the heat exchanger and away from the heat exchanger with respect to the air flow. A method for controlling a condenser using fine mist, wherein fine mist having a particle diameter of 10 μm or less is generated by spraying.   The method for controlling a condenser using the fine mist according to claim 10, wherein the amount of water sprayed is controlled so that the fine mist evaporates before reaching the heat exchanger.   The method for controlling a condenser using fine mist according to claim 10 or 11, wherein an amount of the fine mist generated is controlled according to a temperature of air supplied by the blower.   The method for controlling a condenser using the fine mist according to any one of claims 10 to 12, wherein the blown amount of the blower is controlled according to the amount of air injected when the fine mist is generated.   The humidity is measured immediately before the heat exchanger, and the mixing ratio of air and water when generating the fine mist is adjusted according to the measured value of the humidity. A method for controlling a condenser using the fine mist according to claim 1.

Images