JP2009127944A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of conditioning air to be air-conditioned to an intended state even in the case of utilizing exhaust heat having low temperatures. <P>SOLUTION: This air conditioner includes: a body casing 1 in which an air current is formed from an air inlet 3 to an air outlet 4; a front stage spray nozzle 5 for spraying circulating water in the air current in a water spraying chamber 2 formed in the body casing; a front stage washer medium 6 located on the downstream side of the front stage spray nozzle 5; a cold temperature water coil 7 located on the downstream side of the front stage washer medium 6; a sprinkling nozzle 30 for spraying water to the cold temperature water coil 7; a rear stage washer medium 8 disposed on the down side of the cold temperature water coil 7; a rear stage spray nozzle 9 disposed on the upstream side of the rear stage washer medium 8; a water storing tank 11 for receiving a water drop flowing down along the cold temperature water coil 7 and a water drop flowing down from the water spraying chamber 2; and a circulating water supply system 12 for circulating and supplying circulating water of the water storing tank 11 to the front stage spray nozzle 5, the sprinkling nozzle 30 and the rear stage spray nozzle 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more particularly to the structure and control of a gas removal device for an outside air treatment machine for treating outside air.

  2. Description of the Related Art In recent years, an air washer that air-conditions air by spraying cold water or hot water on air has been adopted as a gas removal device in, for example, an outdoor air treatment machine for a clean room in a semiconductor factory. In the semiconductor production process, an air washer utilizing the gas absorption capacity of pure water is employed to remove trace gas components in the outside air with high efficiency.

  An example of this air washer is disclosed in Patent Document 1. In this case, a water spray chamber is formed between the air inlet and the air outlet of the main casing, the most upstream washer medium is disposed at the air inlet, and the most downstream washer medium is disposed at the most downstream position of the water spray chamber. A spray nozzle located in the water spray chamber downstream of the most upstream washer medium, and a cooling coil disposed downstream of the most downstream washer medium.

  The above-described washer media has a shape substantially equal to the cross section of the air flow path, is made of polyvinyl chloride fiber, stainless steel wire, or the like, and has a mat shape having a thickness of about 25 mm to 50 mm, for example. .

  Moreover, the air conditioner described in Patent Document 2 includes a first heating coil, a cooling coil unit, and a second heating coil disposed in a chamber having an intake port and an air supply port. The first evaporative humidifier material disposed on the upstream side of the upstream cooling coil, the downstream cooling coil, the upstream cooling coil, and the second evaporative humidification disposed on the downstream side of the downstream cooling coil Made of vessel material. In the lower part of the cooling coil section, a water tank is provided, and pure water is supplied from above the second vaporizing humidifier material, and the upstream cooling coil, the downstream cooling coil, and the first vaporizing humidifier material are used. Circulates and supplies dripped water from above.

  In addition, the dehumidifying / humidifying system described in Patent Document 3 includes a vaporization type humidifying film in which the first water film and the second water film have a predetermined gas-liquid contact area, and a predetermined concentration between the two water films. The hygroscopic solution circulates, a heating coil is disposed in front of the first water film, and a cooling coil is disposed between the first water film and the second water film.

  In the summer dehumidifying mode, the first water film functions as a humidifying part (regenerating part), and the second water film functions as a dehumidifying part. In the dehumidifying mode in winter, both the first water film and the second water film are humidified parts. In the dehumidifying mode in the intermediate period, the first water film functions as a humidifying unit (regeneration unit), and the second water film functions as a dehumidifying unit.

Further, the eliminator for a spray-type humidifier described in Patent Document 4 divides a filter material having a certain thickness formed from a fiber material into two, and a space is formed between the two filter media. The frame is surrounded by a frame-shaped frame that surrounds both sides of the outer peripheral frame and the outer peripheral frame, and the two filter media are spaced apart so that a space is formed between the filter media. A drainage opening is formed at the bottom of the groove formed by the outer peripheral frame and the partition frame.
JP 2000-312810 A JP 2005-249367 A JP 2004-28526 A Japanese Patent No. 3371043

  By the way, in the air conditioner, the performance of the heat exchange efficiency of the heat exchange coil greatly affects the control of the temperature and humidity of the air-conditioning target air and the amount of energy consumption. In the case of water humidification with an isoenthalpy change, a high-temperature heat medium is required for the preheating coil, and an air washer for hot water spray requires a large amount of spray water.

  On the other hand, in recent years, technology development using unused energy such as exhaust heat has been performed in order to effectively use energy. However, unused energy such as exhaust heat is often low in temperature, and there are few applications that can be used.

  The present invention solves the above-described problems, and provides an air conditioner that can adjust air-conditioning target air to a target state even when exhaust heat with low temperature is used. Objective.

  In order to solve the above problems, an air conditioner of the present invention includes a main body casing that generates an air flow from an air inlet toward an air outlet, a heat exchange coil that is disposed in a water spray chamber of the main body casing, and a heat exchange coil. An upstream humidifier and a downstream humidifier arranged on the upstream side and downstream side to spray humidification water to humidify the air flow, a water spray means for spraying the circulating water to wet the heat exchange coil, and at least the heat exchange coil A water storage tank for storing circulating water flowing down through the water, and circulatingly supplying the circulating water from the water storage tank to the sprinkling means, and circulating the circulating water as humidification water to at least one of the upstream humidifying means and the downstream humidifying means. A circulating water supply system is provided.

  Further, at least one of the upstream-side humidifying means and the downstream-side humidifying means includes a spray nozzle that sprays circulating water in an air flow and a washer medium that captures mist sprayed from the spray nozzle. .

  In addition, the main body casing in which an air flow is generated from the air inlet to the air outlet, the heat exchange coil disposed in the water spray chamber of the main body casing, and the upstream and downstream sides of the heat exchange coil are sprayed with humidifying water. Upstream humidifying means and downstream humidifying means for humidifying the air flow, a water storage tank for storing circulating water flowing down through at least the heat exchange coil, and at least the upstream humidifying means for circulating water in the storage tank as humidification water A circulating water supply system for circulating supply is provided, and the upstream humidifying means humidifies the air flow and sprays humidifying water so as to wet the heat exchange coil.

  Further, the upstream side humidifying means is composed of a spray nozzle that sprays circulating water in the air flow and a washer medium that is located downstream of the spray nozzle and through which a part of the mist passes along with the air flow. Features.

  Further, the circulating water supply system circulates and supplies the circulating water in the water storage tank as the humidifying water to the downstream humidifying means, and the downstream humidifying means is located on the downstream side of the spray nozzle and the spray nozzle for spraying the humidifying water in the air flow. And a washer medium having gas-liquid separation ability to prevent the passage of mist of humidifying water.

  Further, it is possible to switch the presence / absence of the humidifying operation by the downstream humidifying means.

  As described above, according to the present invention, the heat exchange coil heats the air on the heat transfer surface and heats the water droplets of the circulating water that wets the heat transfer surface to promote vaporization. At this time, the heat exchange coil increases the heat exchange efficiency by exchanging heat between the gas phase of the air flow and the liquid phase of the water droplets, compared to the case of exchanging heat only with the gas phase of the air flow. Can do.

  The heated water droplet flows down through the heat exchange coil, and the water tank receives the water droplet together with the water droplet flowing down from the water spray chamber. As the heated water drops mix, the temperature of the circulating water in the water tank rises. Therefore, not only the air flow but also the circulating water can be heated by the amount of heat given by the heat exchange coil, and the water vaporization and temperature increase on the heat transfer surface of the heat exchange coil is sprayed into the air stream for humidification. However, the dew point after humidification can be increased by heating.

  For this reason, according to the present invention, it is possible to save energy by simultaneously increasing the heat exchange efficiency and the dew point, and even when using low-temperature exhaust heat or the like, the air to be air-conditioned is aimed. Can be adjusted to the state.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, the operation principle of the present invention will be described based on the main part of the air conditioner, and the entire air conditioner will be described later.
In FIG. 1, a main body casing 1 forms a water spray chamber 2 therein, and an air flow A is generated from an upstream air inlet 3 toward a downstream air outlet 4. In the upstream position near the air inlet 3 of the water spray chamber 2, the upstream spray nozzles 5 are arranged in multiple stages up and down, and in the downstream position of the upstream spray nozzle 5, the upstream washer media 6 are arranged in multiple stages in the vertical direction. . The pre-stage spray nozzle 5 and the pre-stage washer medium 6 constitute an upstream humidifier, and as described later, circulating water is sprayed as humidifying water to humidify the air flow. However, it is also possible to configure the upstream humidifying means with only the front spray nozzle 5. In the present embodiment, the pre-stage spray nozzle 5 sprays toward the downstream side, but the pre-stage spray nozzle 5 may be arranged to spray toward the upstream side, and further downstream of the pre-stage washer media 6. It is also possible to arrange so as to spray toward the upstream side.

  A chilled / hot water coil 7 is arranged as a heat exchange coil at a downstream position of the preceding washer media 6, and a irrigation nozzle 30 serving as a watering means is arranged at an upstream position of the chilled / hot water coil 7. Water wets the cold / hot water coil 7. The water spray nozzle 30 can be disposed above the cold / hot water coil 7, or can be disposed on the downstream side of the cold / hot water coil 7 to spray water toward the upstream side.

  On the downstream side of the hot / cold water coil 7, the rear washer media 8 are arranged in multiple stages in the vertical direction and in multiple directions in the air flow direction, and the rear spray nozzle 9 is arranged on the upstream side of the rear washer media 8. The latter-stage washer media 8 and the latter-stage spray nozzle 9 constitute a downstream-side humidifying means, and as described later, circulating water is sprayed as humidification water to humidify the air flow. However, it is also possible to configure the downstream humidifying means with only the rear spray nozzle 9.

  A makeup water nozzle 10 is disposed at an upper position on the upstream side of the rear washer medium 8, and a water storage tank 11 for storing circulating water is disposed at the lower portion of the main body casing 1. A circulating water supply system 12 communicating with the water storage tank 11 is connected to the front spray nozzle 5, the rear spray nozzle 9 and the water spray nozzle 30.

  The pre-stage spray nozzle 5 and the post-stage spray nozzle 9 spray the circulating water circulating in the system as humidifying water into the air stream. As shown in FIG. 5A, the pre-stage spray nozzle 5 and the post-stage spray nozzle Reference numeral 9 denotes a shape in which the nozzle opening is in a direction perpendicular to the flow direction of the air flow A and is directed upward, and the water for humidification (circulation water) is sprayed upward.

  A mesh member 13 having a predetermined mesh made of a wire mesh or the like is disposed in front of the front spray nozzle 5 and the rear spray nozzle 9. As shown in FIG. 6, the mesh member 13 has a semicircular shape covering the upper part of the front spray nozzle 5 and the rear spray nozzle 9, and water for humidification sprayed from the front spray nozzle 5 and the rear spray nozzle 9 ( Circulating water) is dispersed, and the mist that has passed through the mesh member 13 is sprayed onto the front washer media 6 or the rear washer media 8.

  In this way, by using only the upward nozzles, the downward number of nozzles is eliminated and the number of nozzles is reduced. However, in the front washer media 6 or the rear washer media 8, the water drops flow inevitably in the lower region. Can also supply enough moisture. Further, since the mesh member 13 is formed in a semicircular shape upward, the upper mesh member 13 does not hinder the spraying of the lower front spray nozzle 5 or the rear spray nozzle 9.

  As shown in FIG. 5B, even when the mesh member 13 is not provided, the front washer media 6 or the rear washer is provided by providing the nozzle ports of the front spray nozzle 5 and the rear spray nozzle 9 facing upward. It is possible to spray the media 8.

  The front-stage washer media 6 and the rear-stage washer media 8 are made of resin media 14. In the present embodiment, the resin media 14 is used, but the media used for the front washer media 6 and the rear washer media 8 may have any form as long as they have air permeability and a predetermined ability to capture mist. Is not limited, and various types can be adopted.

  The front washer media 6 is formed by arranging a plurality of resin media 14 supported by a support frame 15 in a single plane, and one resin media 14 is arranged in the flow direction of the air flow A.

  This resinous medium 14 has a gas-liquid separation ability to capture the mist of humidifying water sprayed from the pre-stage spray nozzle 5, but part of the mist of humidifying water passes along with the air flow A (water jump or carry over). In this case, the mist that has passed through the resinous medium 14 reaches the heat transfer surface of the cold / hot water coil 7.

  The post-washer media 8 is a double structure in which a plurality of resin media 14 supported by a support frame 16 are arranged in a single plane, with a predetermined gap in the flow direction of the air flow A as shown in FIG. The spacer 17 is disposed between the resin media 14, and the water droplets and condensed water flow into the water storage tank 11 after being received by the support frame 16.

  With this configuration, the post-washer media 8 realizes sufficient gas-liquid separation capability as an eliminator that increases saturation efficiency and prevents passage of mist (spraying or carrying over).

The make-up water nozzle 10 communicates with a make-up water system (not shown) and supplements pure water according to the amount of decrease in circulating water, and sprays make-up water toward the upper portion of the post-washer media 8.
The water storage tank 11 receives water droplets of humidifying water sprayed from the front spray nozzle 5 and the rear spray nozzle 9 and water droplets of the circulating water sprayed from the water spray nozzle 30, and water drops falling from the air flow in the water spray chamber 2. In addition, water drops (condensed water) flowing down through the front washer media 6, the rear washer media 8, and the cold / hot water coil 7 flow into the water storage tank 11.

  The circulating water supply system 12 includes a pump 18. The suction side communicates with the water storage tank 11, and the discharge side communicates with the front spray nozzle 5, the rear spray nozzle 9, and the water spray nozzle 30. As shown in FIG. 3, the water storage tank 11 constituting the circulation system can be configured as a separate type provided with a tank 19 separately. Here, the circulating water supply system 12 and the makeup water system 21 are connected to the outflow side partitioned by the screen 20, and flow down through the front washer media 6, the rear washer media 8, and the cold / hot water coil 7 to the inflow side. Water droplets (condensed water) and humidifying water falling from the air flow in the water spray chamber 2 flow in. An overflow pipe 22 and a drain pipe 23 are connected to the inflow side of the tank 19.

In the configuration shown in FIG. 1 described above, the upstream spray nozzle 5 serving as the upstream humidifying means and the watering nozzle 30 serving as the water spraying means are separately arranged.
However, as shown in FIG. 2, it is also possible to spray the humidification water so as to wet the cold / hot water coil 7 while humidifying the air flow only by the upstream spray nozzle 5 of the upstream humidification means. In this case, the resin medium 14 embodies a gas-liquid separation ability that allows a part of the mist of the humidifying water sprayed from the front spray nozzle 5 to pass through the air flow A (spray or carry over). The mist that has passed through the resinous medium 14 reaches the heat transfer surface of the cold / hot water coil 7.

  The pre-washer media 6 is disposed close to the cold / hot water coil 7 in order to increase the heat exchange efficiency and to allow most of the mist that has passed through the pre-washer media 6 to be heated by the cold / hot water coil 7. It is good, and the effect can be heightened more by arrange | positioning so that it may contact.

  However, the pre-washer media 6 is not necessarily arranged, and the pre-spray nozzle 5 is arranged at a predetermined distance from the cold / hot water coil 7 and the humidifying water sprayed from the pre-spray nozzle 5 is sufficiently in contact with the air flow. It can also be realized by reaching the cold / hot water coil 7.

  Hereinafter, the operation of the above-described configuration will be described. As shown in FIG. 7, in the winter operation mode, circulating water is sprayed from the front spray nozzle 5 and the rear spray nozzle 9, and hot water is passed through the cold / hot water coil 7 to be used as a heating coil. In the summer operation mode, circulating water is sprayed from the front spray nozzle 5, spraying of the rear spray nozzle 9 is stopped, and cold water is passed through the cold / hot water coil 7 to be used as a cooling coil. In the dust removal operation mode, circulating water is sprayed from the front-stage spray nozzle 5 and the rear-stage spray nozzle 9, and cold water is passed through the cold / hot water coil 7 to be used as a cooling coil.

Control in the winter operation mode and the summer operation mode is switched using as an index the measurement temperature of a wet bulb thermometer that measures the temperature of the external air described later.
The dust removal operation mode is performed when there is a possibility that a large amount of dust such as sand and sea salt particles may be mixed into the air-conditioning target air in the summer operation mode. The humidification operation is activated to enhance the dust removal function, and the operation mode is switched from the summer operation mode to the dust removal operation mode based on human judgment or external environment information such as wind speed, atmospheric pressure, rainfall, and the number of fine particles. Thus, energy saving can be achieved by setting an appropriate operation mode according to the temperature of the outside air and the degree of contamination.

  Each operation mode will be described in detail later. Here, the winter operation mode will be described as an example. The pump 18 of the circulating water supply system 12 is driven to spray the circulating water in the water storage tank 11 from the front spray nozzle 5 and the rear spray nozzle 9 as humidifying water. The mist of circulating water sprayed from the pre-stage spray nozzle 5 in the air flow flowing from the air inlet 3 to the air outlet 4 of the main casing 1 humidifies the air and captures dust in the air flow. Accompanied, the front washer media 6 is reached.

  The front-stage washer media 6 captures mist in the air flow, and forms a water film in the front-stage washer media 6 with the captured mist to increase the saturation efficiency of the air flow and capture dust and gas in the air flow.

  The circulating water sprayed from the watering nozzle 30 wets the cold / hot water coil 7, and the cold / hot water coil 7 heats the air on the heat transfer surface and heats the water droplets on the heat transfer surface to promote vaporization. Alternatively, when part of the mist together with the air flow A passes through the preceding washer media 6 and reaches the cold / hot water coil 7, the cold / hot water coil 7 heats the water droplets of the humidifying water adhering to the heat transfer surface to promote vaporization. To do.

  At this time, the cold / hot water coil 7 exchanges heat by exchanging heat between the gas phase of the air stream A and the liquid phase of water droplets, compared to the case where heat exchange is performed only with the gas phase of the air stream A. Efficiency can be increased.

  The heated water droplet flows down through the cold / hot water coil 7, and the water tank 11 receives the water droplet. The temperature of the circulating water in the water storage tank 11 is increased by mixing the heated water droplets. The circulating water whose temperature has been increased is sprayed into the air flow from the front spray nozzle 5 and the rear spray nozzle 9, and the evaporation efficiency of the water droplets on the heat transfer surface of the cold / hot water coil 7 is increased, and the dew point is increased. Can do.

  The mist of circulating water sprayed from the rear spray nozzle 9 into the air stream humidifies the air and captures dust in the air stream, and reaches the rear washer medium 8 along with the air stream A. The post-washer media 8 captures mist and dust in the air flow, separates the gas and liquid, and allows only air to pass.

  Therefore, according to the present embodiment, not only the air of the air flow A but also the circulating water can be heated by the amount of heat given by the cold / hot water coil 7, and the heat exchange function for heating the circulating water can be accommodated in the machine. it can. Moreover, the dew point after humidification can be raised by spraying the circulating water which raised temperature in the air flow, and humidifying.

  Therefore, according to the present invention, by simultaneously increasing the dew point and the heat exchange efficiency, even when using low-temperature exhaust heat or the like, even if the exhaust heat temperature fluctuates, the air-conditioning target air can be used. It can be adjusted to the state.

  Furthermore, not only can exhaust heat at a low temperature be used, but also because the dew point of the supply air is high, it is possible to reduce the energy load of a heating device or the like provided at the subsequent stage of this device, and a significant increase in the overall system Energy saving can be achieved.

  FIG. 8 shows a first embodiment of the present invention. Constituent elements similar to those described in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted. The main casing 1 has an external air chamber 33, a front chamber 34, a water spray chamber 2, and a water supply chamber 32 in order from an upstream side to a downstream side between an external air flow inlet 31 into which external air OA flows and an air supply port 32 through which supply air SA is sent. A rear chamber 35, a blower chamber 36, and an air supply chamber 37 are formed.

  The outside air chamber 33 has an outside air flow inlet 31, a wet bulb thermometer 38, and a prefilter 39 disposed therein. A precooling preheating coil 40 that forms a pre-stage heat exchange coil is disposed in a front chamber 34 that is downstream of the outside air chamber 33, and the precooling preheating coil 40 is provided with a valve device 42 in a medium pipe 41.

  The cold / hot water coil 7 arranged in the water spray chamber 2 is provided with a valve device 44 in the medium conduit 43, and a temperature measuring device 45 for measuring the temperature of water droplets or condensed water received by the support frame 16 of the post-washer media 8. Provided. The valve device 42 of the precooling preheating coil 40 and the valve device 44 of the cold / hot water coil 7 perform opening control or opening / closing control using the temperature measured by the temperature measuring device 45 as an index.

  A cooling coil 46 is disposed in the rear chamber 35, and the cooling coil 46 is provided with a valve device 48 in the medium pipe 47. A dry bulb thermometer 49 is provided on the downstream side of the cooling coil 46, and the valve device 48 performs opening degree control or open / close control using the temperature measured by the dry bulb thermometer 49 as an index.

  A blower 50 is provided in the blower chamber 36, and the air in the rear chamber 35 that has passed through the cooling coil 46 is sucked and discharged to the air supply chamber 37. The air supply chamber 37 is provided with a medium performance filter 51 as the last stage filter.

The operation of the above configuration will be described.
By driving the basic control pump 18, the circulating water in the tank 19 is sprayed from the front spray nozzle 5 and the rear spray nozzle 9 (stopped in summer). Mist droplets and condensed water flowing down through the front washer media 6, the cold / hot water coil 7, the rear washer media 8, and the cooling coil 46, or circulating water falling from the air flow in the water spray chamber 2 flows into the tank 19. Circulate in the system.

  By operating the blower 50, an airflow A is generated in the main casing 1 from the external airflow inlet 31 toward the air supply port 32. The external air OA flowing from the outside air flow inlet 31 passes through the prefilter 39, the precooling preheating coil 40, the front washer media 6, the cold / hot water coil 7, the rear washer media 8, the cooling coil 46, and the blower 50, and the middle performance of the last stage. After passing through the filter 51, it is sent out as supply air SA. As will be described later, since the front washer media 6 and the rear washer media 8 have a dust removal function, the load applied to the medium performance filter 51 arranged at the most downstream position can be suppressed, and the filter life of the medium performance filter 51 can be reduced. Can prolong life.

The winter operation mode and the summer operation mode are switched using the measurement temperature of the wet bulb thermometer 38 as an index. The summer operation mode and the dust removal operation mode are switched based on human judgment or external environment information such as wind speed, atmospheric pressure, rainfall, and the number of fine particles.
Winter Operation Mode In the winter operation mode, hot water having a predetermined temperature, here, water having a waste heat of 28 ° C. is passed through the pre-cooling preheating coil 40 and the cold / hot water coil 7, and cold water having a predetermined temperature is passed through the cooling coil 46. To do. The external air OA is dedusted by the prefilter 39 and heated to a predetermined temperature by the precooling preheating coil 40.

  The circulating water is sprayed from the front-stage spray nozzle 5 into the air stream at a predetermined temperature that has passed through the pre-cooling preheating coil 40 to humidify the mist and dust in the air stream by the front-stage washer media 6 located downstream of the front-stage spray nozzle 5. To capture. A part of the mist of the circulating water sprayed from the front spray nozzle 5 passes through the front washer medium 6 along with the air flow A and reaches the cold / hot water coil 7.

  The cold / hot water coil 7 heats air on the heat transfer surface and heats water droplets adhering to the heat transfer surface. The heated water droplet flows down through the cold / hot water coil 7, and the tank 19 receives the water droplet. Saturation efficiency and dew point are increased by spraying circulating water whose temperature has been increased by mixing the heated water droplets into the air stream from the front spray nozzle 5 and the rear spray nozzle 9.

The rear spray nozzle 9 sprays the circulating water into the air flow that has passed through the cold / hot water coil 7, and the mist of the circulating water humidifies the air and captures dust in the air flow. Reach media 8. The post-washer media 8 captures mist and dust in the air flow, separates the gas and liquid, and allows only air to pass. The air that has passed through the rear washer media 8 passes through the blower 50 and the medium performance filter 51 and is sent out as supply air SA.
Summer operation mode In the summer operation mode, cold water of a predetermined temperature is passed through the precooling preheating coil 40, the cold / hot water coil 7 and the cooling coil 46, respectively. The external air OA is dedusted by the pre-filter 39, and the temperature is reduced to a predetermined temperature by the pre-cooling preheating coil 40.

  The circulating water is sprayed from the front-stage spray nozzle 5 into the air stream at a predetermined temperature that has passed through the pre-cooling preheating coil 40 to humidify the mist and dust in the air stream by the front-stage washer media 6 located downstream of the front-stage spray nozzle 5. To capture. A part of the mist of the circulating water sprayed from the front spray nozzle 5 passes through the front washer medium 6 along with the air flow A and reaches the cold / hot water coil 7.

  The cold / hot water coil 7 cools air on the heat transfer surface. The cooled water droplet flows down through the cold / hot water coil 7, and the tank 19 receives the water droplet. In the summer operation mode, spraying of the rear spray nozzle 9 is stopped.

The post-washer media 8 captures mist and dust in the air flow, separates the gas and liquid, and allows only air to pass. The air that has passed through the rear washer media 8 passes through the blower 50 and the medium performance filter 51 and is sent out as supply air SA.
Dust Removal Operation Mode In the dust removal operation mode, cold water having a predetermined temperature is passed through each of the precooling preheating coil 40, the cold / hot water coil 7 and the cooling coil 46. The external air OA is dedusted by the pre-filter 39, and the temperature is reduced to a predetermined temperature by the pre-cooling preheating coil 40.

  The circulating water is sprayed from the front-stage spray nozzle 5 into the air stream at a predetermined temperature that has passed through the pre-cooling preheating coil 40 to humidify the mist and dust in the air stream by the front-stage washer media 6 located downstream of the front-stage spray nozzle 5. To capture. A part of the mist of the circulating water sprayed from the front spray nozzle 5 passes through the front washer medium 6 along with the air flow A and reaches the cold / hot water coil 7.

The cold / hot water coil 7 cools air on the heat transfer surface. The cooled water droplet flows down through the cold / hot water coil 7, and the tank 19 receives the water droplet.
The rear spray nozzle 9 sprays the circulating water into the air flow that has passed through the cold / hot water coil 7, and the mist of the circulating water humidifies the air and captures dust in the air flow. Reach media 8.

  The post-washer media 8 captures mist and dust in the air flow, separates the gas and liquid, and allows only air to pass. The air that has passed through the rear washer media 8 passes through the blower 50 and the medium performance filter 51 and is sent out as supply air SA.

  Next, the effect of the present invention will be described in comparison with the conventional method. FIG. 11 schematically shows the configuration of the present invention, and the same components as those described above are denoted by the same reference numerals and description thereof is omitted. FIG. 10 shows a configuration using a vaporizing humidifier according to a conventional method, and FIG. 9 is an air diagram showing a winter state line in both. The numbers in parentheses described in FIGS. 10 and 11 correspond to the numbers in parentheses attached to each state point in FIG.

  In FIG. 10, a main casing 60 has a precooling preheating coil 63, a first vaporizing humidifier material 64, a cold / hot water coil 65, and a second vaporizing type between an external airflow inlet 61 and an air supply port 62. A humidifier material 66, a cooling coil 67, and a blower 68 are sequentially arranged, and makeup water is dropped onto each of the first vaporizer-type humidifier material 64 and the second vaporizer-type humidifier material 66.

  Here, in the conventional configuration shown in FIG. 10 and the configuration of the present invention shown in FIG. 11, the air temperatures after passing through the precooling preheating coil 40 are DB25 ° C. and WB10.3 ° C., the coil capacities are equal, and the precooling preheating is performed. Comparison is made under the operating conditions of the coil 63 and the cold / hot water coil 65 where the coil inlet hot water temperature is 28 ° C. and the outlet hot water temperature is 20 ° C.

  In the conventional configuration, as indicated by a broken line in FIG. 9, when heating by the precooling preheating coil 63 [change from (1) to (2)] and when heating by the cold / hot water coil 65 [(3) to (4) Change in state] is a temperature change not accompanied by a change in absolute humidity, and during humidification by the first vaporizing humidifier material 64 [change from (2) to (3)], and second During humidification by the vaporizing humidifier material 66 [change from (4) to (5)] is a temperature change with a constant enthalpy and a change in absolute humidity.

  In the configuration of the present invention, as shown by the solid line in FIG. 9, the state change of [change from (1) to (2)] during heating by the precooling preheating coil 40 is a temperature change not accompanied by a change in absolute humidity. This is the same as in the prior art.

  However, the state change [change from (3) to (4)] at the time of heating by the cold / hot water coil 7 is a temperature change accompanied by a change in absolute humidity due to vaporization of mist on the heat transfer surface. High absolute humidity can be achieved. Furthermore, the humidification by the pre-stage spray nozzle 5 and the pre-stage washer media 6 [change from (2) to (3)] is accompanied by a change in enthalpy and a change in absolute humidity due to the temperature rise of the circulating water to be sprayed. Therefore, it is possible to realize a higher wet bulb humidity than before.

  Therefore, in the present invention, the circulating water is heated by the cold / hot water coil 7 and sprayed with the hot water, thereby functioning as a hot water washer in [change from (2) to (3)], so that the exhaust heat with low temperature The dew point can be increased by effectively utilizing the above. Further, by realizing heating with humidification in [change from (3) to (4)] in the cold / hot water coil 7, the dew point and the heat exchange efficiency are simultaneously improved by effectively utilizing the exhaust heat at a low temperature. be able to.

  As shown in FIG. 12, the present invention may be configured such that a pump 18 a supplied to the front spray nozzle 5 and a pump 18 b supplied to the rear spray nozzle 9 are separately provided in the circulating water supply system 12.

  Further, as shown in FIG. 13, in the summer operation mode, the circulating water is cooled by the cold / hot water coil 7 and sprayed with cold water, thereby functioning as a cold water washer in [change from (2) to (3)]. Therefore, the heat exchange efficiency can be increased.

  Moreover, as shown in FIG. 14, it is also possible to arrange | position a vaporization type humidifier raw material as an upstream and downstream humidification means, and to make it the structure which drips the water for humidification. In this case, it is desirable to arrange an eliminator for gas-liquid separation on the downstream side of the downstream humidifying means.

The schematic diagram which shows the principal part of the air conditioner in embodiment of this invention The schematic diagram which shows the principal part of a different structure of the air conditioner The schematic diagram which shows the principal part of a different structure of the air conditioner Schematic diagram showing the main part of the rear washer media in the embodiment of the present invention. (A) is a side view showing a nozzle structure in an embodiment of the present invention, (b) is a side view showing a nozzle structure of a different configuration. The mesh member 13 in the same embodiment is shown, (a) is a plan view, (b) is a side view. Chart showing specifications of each operation mode in the same embodiment The schematic diagram which shows the air conditioner in Example 1 of this invention. Air diagram showing comparison between the method of the present invention and the conventional method Schematic diagram showing an air conditioner according to a conventional method The schematic diagram which shows the air conditioner which concerns on the system of this invention The schematic diagram which shows the other structure of the air conditioner which concerns on the system of this invention. Airline diagram showing state change in summer in air conditioner of other configuration of the present invention The schematic diagram which shows the air conditioner of the other structure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body casing 2 Water spray chamber 3 Air inlet 4 Air outlet 5 Previous stage spray nozzle 6 Previous stage washer media 7 Cold / hot water coil 8 Later stage washer media 9 Later stage spray nozzle 10 Replenishment water nozzle 11 Water tank 12 Circulating water supply system 13 Mesh member 14 Resin Media 15 and 16 Support frame 17 Spacer 18 Pump 19 Tank 20 Screen 21 Makeup water system 22 Overflow pipe 23 Drain pipe 30 Sprinkling nozzle 31 External air flow inlet 32 Air supply port 33 External air chamber 34 Front chamber 35 Rear chamber 36 Blower chamber 37 Air supply Chamber 38 Wet bulb thermometer 39 Pre-filter 40 Pre-cooling pre-heating coil 41, 43, 47 Medium conduit 42, 44, 48 Valve device 45 Temperature measuring device 46 Cooling coil 49 Dry bulb thermometer 50 Blower 51 Medium performance filter

Claims (6)

  A main body casing that generates an air flow from the air inlet to the air outlet, a heat exchange coil that is disposed in the water spray chamber of the main body casing, and an upstream side and a downstream side of the heat exchange coil, and is sprayed with humidifying water to air An upstream humidifying means and a downstream humidifying means for humidifying the flow; a watering means for spraying circulating water to wet the heat exchange coil; a water storage tank for storing the circulating water flowing down through at least the heat exchange coil; and a water storage tank An air conditioner comprising: a circulating water supply system that circulates and supplies the circulating water to the watering means and circulates and supplies the circulating water as humidifying water to at least one of the upstream humidifying means and the downstream humidifying means. Machine.   The at least one of the upstream humidifier and the downstream humidifier includes a spray nozzle that sprays circulating water in an air flow and a washer medium that captures mist sprayed from the spray nozzle. The air conditioner according to 1.   A main body casing that generates an air flow from the air inlet to the air outlet, a heat exchange coil that is disposed in the water spray chamber of the main body casing, and an upstream side and a downstream side of the heat exchange coil, and is sprayed with humidifying water to air Upstream humidifying means and downstream humidifying means for humidifying the flow, a water storage tank for storing circulating water flowing down through at least the heat exchange coil, and circulating supply of the circulating water from the storage tank as humidification water to at least the upstream humidifying means An air conditioner comprising: a circulating water supply system, wherein the upstream humidifying means humidifies the air flow and sprays humidifying water so as to wet the heat exchange coil.   The upstream humidifying means comprises a spray nozzle that sprays circulating water in an air flow, and a washer medium that is located downstream of the spray nozzle and through which a part of the mist passes along with the air flow. The air conditioner according to claim 3.   The circulating water supply system circulates and supplies the circulating water in the water storage tank as the humidifying water to the downstream humidifying means, and the downstream humidifying means is located on the downstream side of the spray nozzle, the spray nozzle spraying the humidifying water in the air flow, The air conditioner according to claim 1, comprising a washer medium having gas-liquid separation ability to prevent passage of mist of humidifying water.   The air conditioner according to any one of claims 1 to 5, wherein the presence or absence of a humidifying operation by the downstream humidifying means can be switched.

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