JP2008032303A - Air conditioning control method and air conditioner - Google Patents

Abstract

An air conditioning control method and an air conditioner are provided that can accurately measure the state of air to be processed and obtain air having a required absolute humidity.
In an air conditioner that ventilates a processing target air (51) through a casing (50), water to be processed is sprayed from a spray nozzle (61) to a processing target air (51) heated by a precooling and preheating coil (52) at a position upstream of a water spray chamber (60). The water is captured and separated from the air to be treated by the washer media 62 at the downstream side of the casing 50, the water temperature is measured by the thermometer 67 using the captured and separated water as measurement water, and the temperature of the measured water is maintained at a constant temperature. The temperature of the processing target air 51 is adjusted by the precooling and preheating coil 52.
[Selection] Figure 1

Description

  The present invention relates to an air conditioning control method and an air conditioner, and particularly relates to technologies such as an air conditioner for a clean room and an air washer using exhaust heat.

  Conventionally, this type of technology includes, for example, one described in Patent Document 1. This will be described with reference to FIGS. In FIG. 9, a cooling coil 2, a heating coil 3, an air washer 4, and a dew point meter 5 are installed inside the housing 1 along the flow direction through which air passes, and a blower 6 and a filter are provided outside the housing 1. 7 is installed.

  The air washer 4 includes a spraying device 4a, a capturing unit 4b for capturing sprayed water, a water tank 4c, a circulation pump, and the like. A preheating coil 10 is installed on the upstream side of the cooling coil 2 inside the housing 1, and an air washer. A dehumidifying / reheating coil 12 is installed on the downstream side of 4.

  The dew point meter 5 measures the dew point temperature of the air in the path of the processed air before reaching the air-conditioned room, and is installed downstream of the dehumidifying / reheating coil 12. The temperature sensor 11 measures the temperature after the gas-liquid contact with the air washer 4, and is installed between the air washer 4 and the dehumidifying / reheating coil 12.

  The preheating coil 10 and the dehumidifying / reheating coil 12 are connected via water passages 13 and 14, and the water passage 13 is provided with an inverter control pump 15 and a heat exchanger 16, and the heat exchanger 16 is cold water. Cooling operation is performed with cold water passing through the pipe 17.

  In this configuration, during the humidification period when the outside air is dried at a low temperature, the cold heat obtained from the outside air by the preheating coil 10 is transmitted to the dehumidification / reheating coil 12 to perform dehumidification, and the heat obtained by the dehumidification is obtained. To preheat the outside air.

  The air diagram of FIG. 10 shows the state of air at the respective positions a to f inside the housing 1 during the humidification period. In FIG. 10, the outside air at the point a is heated to the point b by the preheating coil 10 and further heated to the point c at a temperature greatly exceeding 23 ° C. by the heating coil 3. Thereafter, the humidification amount A is humidified while the air washer 4 makes a transition to the point d along the isenthalpy line.

  Next, the dehumidifying action by the dehumidifying / reheating coil 12 makes a transition to the point e along the saturation line, and while being sent to the clean room, it receives the heat of the blower 6 and becomes a point f. It becomes.

  Patent Document 2 describes an air conditioner including a preheating coil, an air washer, and a cooling and dehumidifying coil from the air introduction side to the air outlet side. The preheating coil communicates with the heating heat medium via a pipe. The air washer has a water spray circuit with a heat exchanger, the heat exchanger communicates with the heating medium via piping, and the cooling and dehumidification coil communicates with the cooling heat source via piping. .

In this configuration, hot water is supplied from the heating medium to the preheating coil to heat the outside air, and then the heat energy of the heating medium is converted to the warm water of the air washer through the heat exchanger, and the outside air is heated and humidified by the hot water. .
JP 2002-267206 A JP-A-10-253095

  In the configuration of the above-mentioned Patent Document 1, the temperature of water sent to the dehumidification / reheating coil 12 varies depending on the absolute humidity condition of the supply air, and is adjusted according to the absolute humidity condition of the supply air, that is, the dew point temperature. Yes. The amount of humidification is adjusted by controlling the amount of hot water supplied to the heating coil 3, and specifically, the opening degree of the two-way motor operated valve 3a with the temperature or dew point temperature downstream of the air washer 4 as an index. It is done by controlling.

  By the way, the air flowing through the housing 1 is not necessarily in a uniform state, and the temperature distribution is not uniform. For this reason, when the temperature or dew point of the air flowing through the housing 1 is measured at one fixed point of the housing 1, the measured value is an index that appropriately indicates the overall or average state of the air to be measured. There is no guarantee.

  In addition, the dew point meter is expensive, and periodic calibration is necessary to maintain accuracy. In addition, even when the relative humidity is measured using a hygrometer instead of the dew point meter and the control is performed based on the measured value, the measured relative humidity is the whole of the air to be measured, There is no guarantee that it is a good indicator of the average condition.

  An object of the present invention is to solve the above problems, and to provide an air conditioning control method and an air conditioner that can accurately measure the state of the air to be processed and obtain air having the required absolute humidity. And

  In order to solve the above-described problems, an air conditioning control method according to the present invention is an air conditioner that ventilates air to be processed in a casing, and sprays the processing target air heated by the air temperature adjusting means at an upstream position in the casing. The water is sprayed and collected from the processing target air at a downstream position in the casing, and the water temperature is measured using the captured and separated water as measurement water, and the temperature of the measurement water is maintained at a constant temperature. The temperature of the air to be processed is adjusted by the adjusting means.

  The air conditioning control method of the present invention is an air conditioner for passing air to be processed in a casing, and the water heated by the water temperature adjusting means is added to the air to be processed heated by the air temperature adjusting means at the upstream side position in the casing. The nozzle is sprayed from the spraying means, captures and separates the water from the processing target air at a downstream position in the casing, measures the water temperature using the captured and separated water as measurement water, and maintains the water temperature of the measurement water at a constant temperature. The temperature of the water to be sprayed from is adjusted by the water temperature adjusting means.

Further, the processing target air is substantially saturated air between an upstream position where the water is sprayed and a downstream position where the water is captured and separated from the processing target air.
Moreover, the water temperature of measurement water is maintained at the same temperature as a predetermined wet bulb temperature of air.

  An air conditioner according to the present invention is an air conditioner for ventilating a processing target air in a casing, an air temperature adjusting means for adjusting the temperature of the processing target air in the casing, and a processing target air heated by the air temperature adjusting means. Spraying means for spraying water at an upstream position in the casing, water temperature measuring means for capturing and separating the water from the processing target air at the downstream position in the casing, and measuring the water temperature using the captured water as measurement water, And a control means for controlling the temperature adjustment of the air to be processed by the air temperature adjusting means so that the measured value of the water temperature measuring means maintains a constant temperature.

  An air conditioner according to the present invention is an air conditioner for passing air to be processed in a casing, an air temperature adjusting means for heating the air to be processed in the casing, a water temperature adjusting means for adjusting the temperature of the water, and an air Spraying means for spraying the water heated by the water temperature adjusting means to the processing target air heated by the temperature adjusting means at the upstream position in the casing, and capturing and separating the water from the processing target air at the downstream position in the casing, Water temperature measuring means for measuring the water temperature using the captured and separated water as measurement water, and a control means for controlling the temperature adjustment of the water by the water temperature adjusting means so that the measured value of the water temperature measuring means maintains a constant temperature. Features.

  Further, the water temperature measuring means includes a capturing means for capturing and separating water from the processing target air at a downstream position in the casing, a water tank for storing the water captured and separated by the capturing means, and a water temperature in the water tank as the measuring water. It has the water temperature meter to measure.

In addition, the capturing means has a capturing surface having a size substantially equal to the cross-sectional area of the air flow path in the casing.
Further, the processing target air is substantially saturated air between an upstream position where the water is sprayed and a downstream position where the water is separated from the processing target air.

  Further, the control means controls the temperature of the measured water so that it becomes the same temperature as a predetermined wet bulb temperature of air.

  As an above-described principle operation of the present invention, in an air washer capable of sufficient gas-liquid contact, if the air to be treated is humidified by evaporation of the water sprayed in the casing, the heat of evaporation (heat of vaporization) is generated in the water. The air to be treated is deprived of temperature and gradually approaches 100% relative humidity. The water in contact with the treatment target air is substantially equal to the dew point temperature (wet bulb temperature) of the treatment target air after humidification. This reaction is the same for both heating and equal enthalpy humidification as long as the difference between the wet bulb temperature of the pre-humidification target air and the sprayed water temperature is within 10 ° C.

  For this reason, the water to be treated is sprayed and humidified on the air to be treated in the casing, and the water is captured and separated from the air to be treated. Dew point can be measured accurately.

  In isoenthalpy humidification, the dew point and absolute humidity of saturated air are determined by the wet bulb temperature (WB) of the air to be treated before humidification, and the higher the wet bulb temperature (WB) before humidification, the higher the dew point and absolute of the saturated air. Humidity increases.

  In heating and humidification, the dew point and absolute humidity of saturated air are determined by the wet bulb temperature (WB) before humidification of the air to be treated and the temperature of the water to be sprayed, and the higher the wet bulb temperature (WB) before humidification, the higher the saturation. The dew point and absolute humidity of air become higher, and the dew point and absolute humidity of saturated air become higher as the temperature of the sprayed water becomes higher.

  The wet bulb temperature (WB) before humidification is determined by the dry bulb temperature (DB) of the air to be treated before humidification and the absolute humidity before humidification. Assuming that the absolute humidity before humidification is the same condition, the higher the dry bulb temperature (DB) before humidification, the higher the wet bulb temperature (WB) before humidification and the higher the dew point and absolute humidity of saturated air.

  Therefore, by adjusting the temperature of the air to be treated by the air temperature adjusting means or the temperature of the water by the water temperature adjusting means so that the water temperature of the measurement water is maintained at a constant temperature, the air having the required absolute humidity is obtained. Obtainable.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the air conditioner has a precooling and preheating coil 52 and an air washer that form air temperature adjusting means in the casing 50 in order from the upstream side to the downstream side along the ventilation direction of the processing target air 51. 53, a cooling coil 54, a reheating coil 55, and a fan device 56 are provided, and a filter (not shown) is provided in an air introduction portion on the most upstream side of the casing 50.

  The air conditioner also has a wet thermometer 57 serving as a temperature measuring means for measuring the wet bulb temperature (WB) upstream of the precooling and preheating coil 52, and a dry bulb temperature (DB) downstream of the cooling coil 54. ) Has a first dry thermometer 58 that serves as a temperature measuring means, and a second dry thermometer 59 that serves as a temperature measuring means that measures the dry bulb temperature (DB) is provided downstream of the fan device 56. is doing.

  The air washer 53 has a water spray chamber 60 having a predetermined length, a spray nozzle 61 that forms spray means, and a washer medium 62 that forms capture means. The air 51 to be treated after passing through the washer medium 62 is gas-liquid. The contact substantially becomes saturated air. The spray nozzle 61 sprays water to the processing target air 51 at a position upstream of the water spray chamber 60, and is arranged at a plurality of locations at predetermined intervals in the height direction and the width direction of the casing 50. The direction of the spray nozzle with respect to the air may be any of parallel flow, cross flow, and counter flow.

  The washer media 62 has air permeability, captures and separates spray water in the airflow at a position downstream of the water spray chamber 60, and improves the efficiency of gas-liquid contact by the water film effect in the washer media 62. It has a shape having a trapping surface having a size substantially equal to the cross-sectional area of the inner air flow path, is made of polyvinyl chloride fiber, stainless steel wire, etc., and has a mat shape with a thickness of, for example, about 25 mm to 50 mm belongs to.

  The air washer 53 has a water tank 63 below the spray nozzle 61 and the washer medium 62, and the water tank 63 extends to the vicinity of the air inlet of the cooling coil 54. The water supply system 64 for supplying water to each spray nozzle 61 is connected to the water tank 63 at the base end side and is provided with a supply pump 65. The water supply system 64 is provided on the secondary side of the heat exchanger 66 forming the water temperature adjusting means. Is connected.

  The water tank 63 is provided with a water temperature meter 67 as temperature measuring means for measuring the water temperature of the irrigation water. The water temperature meter 67, the water tank 63, and the washer media 62 constitute water temperature measuring means. The water temperature measuring means collects the water captured and separated from the processing target air 51 by the washer media 62 in the water tank 63 as measurement water, and measures the water temperature with a water temperature meter 67.

  In the present embodiment, the water temperature of the water in the water tank 63 is measured. However, a water tank for measurement is separately provided at the lower end position of the washer medium 62, and only the water flowing down from the washer medium 62 is supplied to the water tank for measurement. It is also possible to collect the measurement water and measure the water temperature, so that the measurement accuracy can be improved.

  A feed pipe 68a and a return pipe 68b of a heat medium supply system 68 are connected to the precooling and preheating coil 52, and an electric flow rate adjusting valve 69 is provided in the return pipe 68b. The flow rate adjusting valve 69 may be an open / close valve.

  The feed pipe line 68a and the return pipe line 68b of the heat medium supply system 68 are connected to the feed pipe line 70a and the return pipe line 70b of the cold water supply system 70 through electric or electromagnetic open / close valves 71a and 71b, respectively. At the same time, the feed pipe 72a and the return pipe 72b of the hot water supply system 72 are connected to each other via electric or electromagnetic on-off valves 73a and 73b.

  Further, the feed pipe line 68a and the return pipe line 68b of the heat medium supply system 68 are branched and connected to the feed pipe line 75a and the return pipe line 75b of the water heating medium supply system 75 connected to the primary side of the heat exchanger 66. An electric flow rate adjusting valve 76 is provided in the return line 75b. The flow rate adjusting valve 76 may be an open / close valve. The pre-cooling and pre-heating coil 52 can be configured only by the pre-heating coil in an air conditioner that does not require pre-cooling.

  A feed pipe 77a and a return pipe 77b of a cold water supply system 77 are connected to the cooling coil 54, and an electric flow rate adjusting valve 78 is interposed in the return pipe 77b. A first dry thermometer 58 is connected to the flow rate adjusting valve 78, and the flow rate adjusting valve 78 opens and closes according to the measured value of the first dry thermometer 58. That is, since the temperature is measured in a saturated state after dehumidifying substantially saturated air with the cooling coil 54, the dew point can be controlled not by the dew point sensor but by the dry thermometer 58.

  A feed pipe 79a and a return pipe 79b of the hot water supply system 79 are connected to the reheating coil 55, and an electric flow rate adjusting valve 80 is interposed in the return pipe 79b. A second dry thermometer 59 is connected to the flow rate adjusting valve 80, and the flow rate adjusting valve 80 opens and closes according to the measured value of the second dry thermometer 59. The reheating coil 55 can be an electric heater and is not necessarily provided.

  A wet-type thermometer 57, a water temperature gauge 67, a flow rate adjustment valve 69, on-off valves 71a and 71b, on-off valves 73a and 73b, and a flow rate adjustment valve 76 are connected to the control controller 81 serving as a control means. 81 adjusts the temperature of the processing target air 51 and the water by controlling the flow rate adjustment valves 69 and 76 so that the measured value of the water temperature gauge 67 maintains a constant temperature (target value). In the controller 81 for control, the same temperature as the dew point of air having a predetermined absolute humidity is set as a constant temperature (target value) of the measured water.

  Hereinafter, the operation of the above-described configuration will be described with reference to Table 1 and FIGS.

（冷却シーズンのピーク期）
制御用コントローラ８１は、ケーシング５０の空気導入部に設けた湿式温度計５７で計測する処理対象空気５１の湿球温度が、ここでの例示として示すＷＢ１４℃以上である場合に冷却シーズンとしての運転を行い、湿球温度がここでの例示として示すＷＢ１９℃以上である場合に冷却シーズンのピーク期としての運転を行う。

(Peak of cooling season)
The controller 81 for control is an operation as a cooling season when the wet bulb temperature of the processing target air 51 measured by the wet thermometer 57 provided in the air introduction part of the casing 50 is equal to or higher than WB14 ° C. shown here as an example. When the wet bulb temperature is WB 19 ° C. or higher shown as an example here, the operation is performed as the peak period of the cooling season.

  Therefore, the control controller 81 opens the on-off valves 71 a and 71 b and closes the on-off valves 73 a and 73 b so that the cold water can be precooled from the cold water supply system 70 and supplied to the preheating coil 52. 69 is opened, and the cold water is precooled and supplied to the preheating coil 52.

  In the air washer 53, the flow rate adjustment valve 76 is closed, the supply pump 65 is operated to supply the water in the water tank 63 to the spray nozzle 61, and the water is sprayed from the spray nozzle 61 into the water spray chamber 60. The sprayed water is captured and separated from the processing target air 51 by the washer media 62, and the separated water is flowed down to the water tank 63 through the washer media 62 and sprayed again into the water spray chamber 60, and the water is sprayed into the water spray chamber 60 and the water tank. 63 and cycle. For this reason, the water is brought into contact with the processing target air 51 in the air of the water spray chamber 60, so that the water temperature becomes substantially the same as the wet bulb temperature of the processing target air 51 and flows down to the water tank 63.

  The control controller 81 opens and opens the flow rate adjustment valve 69 so that the water temperature measured by the water thermometer 67 is 19 ° C., that is, the wet bulb temperature of the processing target air 51 in the water spray chamber 60 is WB 19 ° C. Control the operation of the pre-cooling and pre-heating coil 52. Specifically, when the water temperature measured by the water thermometer 67 is 19 ° C. or higher, that is, when the wet bulb temperature of the processing target air 51 in the water spray chamber 60 is WB 19 ° C. or higher, the flow rate adjustment valve 69 is opened, and the water thermometer When the water temperature measured at 67 is 19 ° C. or lower, that is, when the wet bulb temperature of the processing target air 51 in the water spray chamber 60 is WB 19 ° C. or lower, the flow rate adjusting valve 69 is closed.

  The air diagram of FIG. 2 shows the state of the processing target air 51 at each position (1) to (5) of the casing 50 when the air conditioner is operated at the peak of the cooling season. By the operation of the fan device 56, the processing target air 51 flowing from the air introduction part of the casing 50 passes through the precooling and preheating coil 52 and is cooled and dehumidified by the cooling. That is, as shown in FIG. 2, the state of the processing target air 51 changes from the point (1) to the point (2), and the absolute humidity decreases during this period due to dehumidification.

  When the bypass factor of the coil in the ideal state is 0%, the wet bulb temperature is saturated at WB 19 ° C., and when there is a bypass factor, the air condition at the point (2) near the saturation point on the wet bulb temperature line at WB 19 ° C. It becomes. The air to be treated 51 does not change its state due to the spraying of the air washer 53 if the inlet air state of the air washer 53 is saturated air, and is equihumid if the air state of the inlet air state of the air washer 53 is not saturated. Moving on the spherical line, the point (3) is substantially saturated.

  Therefore, in the air conditioner shown in the present embodiment, the water to be treated is sprayed from the spray nozzle 61 to the processing target air 51 whose temperature has been adjusted by the precooling and preheating coil 52 from the spray nozzle 61 at the upstream position of the water spray chamber 60. The water is captured and separated from the processing target air 51 by the washer media 62 at the downstream side of the water, and the water temperature is measured by a water temperature meter 67 using the captured and separated water as measurement water. The precooling and preheating coil 52 adjusts the temperature of the processing target air 51 so as to maintain WB 19 ° C.

  The processing target air 51 that has passed through the air washer 53 flows into the cooling coil 54. The cooling coil 54 controls the flow adjustment valve 78 to open and close using the measured value as a control index so that the measured value of the first dry thermometer 58 becomes DB12.5 ° C., and controls the supply of cold water by the cold water supply system 77. The air to be treated 51 is reduced in temperature and dehumidified by the cooling.

  That is, as shown in FIG. 2, the state of the processing target air 51 changes from the point (3) to the point (4) along the saturated air line, and during this time, the dry bulb temperature decreases to DB12.5 ° C. As a result of dehumidification, the absolute humidity is reduced to saturated air with a dew point temperature of 12.5 ° C.

The reheating coil 55 controls the opening and closing of the flow rate adjustment valve 80 using the measured value as a control index so that the measured value of the second dry thermometer 59 becomes DB23 ° C., for example, and the hot water supply system 79 supplies hot water. It operates by controlling, and the processing target air 51 is heated by the heating. That is, as shown in FIG. 2, the state of the processing target air 51 is changed from the point (4) to the point (5) while keeping the absolute humidity constant, and the dry bulb temperature rises to DB23 ° C. The control target value of the measured value of the second dry thermometer 59 is not limited to DB23 ° C., but is set to a certain set value on the same dew point temperature as the point (4) in relation to the room load.
(The middle of the cooling season)
The controller 81 for control performs the operation as a cooling season when the wet bulb temperature of the processing target air 51 measured by the wet thermometer 57 provided in the air introduction part of the casing 50 is WB 14 ° C. or more, and the wet bulb temperature is When WB is 19 ° C. or lower, operation is performed as an intermediate period of the cooling season.

  Therefore, the control controller 81 opens the on-off valves 71 a and 71 b and closes the on-off valves 73 a and 73 b so that the cold water can be precooled from the cold water supply system 70 and supplied to the preheating coil 52. 69 is closed to stop pre-cooling and supply of cold water to the pre-heating coil 52.

  The air diagram of FIG. 3 shows the state of the processing target air 51 at each position (1) to (5) of the casing 50 when the air conditioner is operated in the middle of the cooling season. Due to the operation of the fan device 56, the processing target air 51 that flows in from the air introduction part of the casing 50 is precooled and preheated coil 52 without being decooled and dehumidified because the precooling and preheated coil 52 has stopped operating. And flows into the air washer 53. That is, as shown in FIG. 3, the processing target air 51 maintains the same state at the point (2) as the point (1).

  In the air washer 53, the flow rate adjustment valve 76 is closed, the supply pump 65 is operated to supply the water in the water tank 63 to the spray nozzle 61, and the processing target air 51 in the water spray chamber 60 is supplied by the water sprayed from the spray nozzle 61. Humidify with enthalpy. That is, as shown in FIG. 3, the processing target air 51 transitions from the point (2) to the point (3). When the humidification saturation efficiency is 100%, the processing target air 51 becomes saturated air, and when the humidification saturation efficiency is less than 100%. It becomes an air state at a point close to the saturation point.

  The processing target air 51 that has passed through the air washer 53 flows into the cooling coil 54. The cooling coil 54 controls the flow adjustment valve 78 to open and close using the measured value as a control index so that the measured value of the first dry thermometer 58 becomes DB12.5 ° C., and controls the supply of cold water by the cold water supply system 77. The air to be treated 51 is reduced in temperature and dehumidified by the cooling. That is, as shown in FIG. 3, in the ideal state, the processing target air 51 transitions from the point (3) to the point (4) along the saturated air line, and is saturated when the point (3) is close to the saturation point. Asymptotically approaching the air line, the state transitions to the point (4), the dry bulb temperature is lowered to DB12.5 ° C., and the absolute humidity is lowered by dehumidification to become saturated air having a dew point temperature of 12.5 ° C.

The reheating coil 55 controls the opening and closing of the flow rate adjustment valve 80 using the measured value as a control index so that the measured value of the second dry thermometer 59 becomes DB23 ° C., and controls the supply of hot water by the hot water supply system 79. The processing target air 51 is heated by the heating. That is, as shown in FIG. 3, the processing target air 51 changes its state from the point (4) to the point (5) while keeping the absolute humidity constant, and the dry bulb temperature rises to DB23 ° C.
(Interim heating season)
The controller 81 for control performs the operation as a heating season when the wet bulb temperature of the processing target air 51 measured by the wet thermometer 57 provided in the air introduction part of the casing 50 is WB14 ° C. or less.

  For this reason, the controller 81 for control can close the on-off valves 71a and 71b and open the on-off valves 73a and 73b, and can supply hot water (about 30 ° C.) from the hot water supply system 72 to the preheating coil 52. In the state, the flow rate adjustment valve 69 is opened and the opening degree is controlled to precool the hot water and supply it to the preheating coil 52.

  The air diagram of FIG. 4 shows the state of the processing target air 51 at each position (1) to (5) of the casing 50 when the air conditioner is operated in the middle of the heating season. Due to the operation of the fan device 56, the processing target air 51 flowing from the air introduction portion of the casing 50 is heated by the precooling and preheating coil 52 and then flows into the air washer 53. That is, as shown in FIG. 4, the state of the processing target air 51 transitions from the point (1) to the point (2), and is controlled to the wet bulb temperature WB 13.5 ° C. with the dry bulb temperature DB 25 ° C. shown here as an example. Is done. The dry bulb temperature DB25 ° C. is not constant. When the absolute humidity of the processing target air 51 flowing from the air introduction unit is high, the wet bulb temperature WB is 13.5 ° C. at a low dry bulb temperature, and when the absolute humidity is low. The wet bulb temperature WB is 13.5 ° C. at a high dry bulb temperature.

  In the air washer 53, the flow rate adjustment valve 76 is closed, the supply pump 65 is operated to supply the water in the water tank 63 to the spray nozzle 61, and the processing target air 51 in the water spray chamber 60 is supplied by the water sprayed from the spray nozzle 61. Humidify with enthalpy. That is, as shown in FIG. 4, the processing target air 51 transitions from the point (2) to the point (3) along the iso-humid bulb temperature line (WB 13.5 ° C.), and is saturated when the humidification saturation efficiency is 100%. When it becomes air and humidification saturation efficiency is less than 100%, it will be in the air state of the point close | similar to a saturation point.

  The water captured and separated from the processing target air 51 by the washer medium 62 is caused to flow down to the water tank 63 through the washer medium 62 and sprayed again in the water spray chamber 60, and the water spray chamber 60 and the water tank 63 are circulated. For this reason, the water is brought into contact with the processing target air 51 in the air of the water spray chamber 60, so that the water temperature becomes substantially the same as the wet bulb temperature of the processing target air 51 and flows down to the water tank 63.

  The control controller 81 has a water temperature measured by the water temperature meter 67 of 13.5 ° C., that is, the wet bulb temperature of the processing target air 51 passing through the washer medium 62 at the most downstream position of the water spray chamber 60 is WB 13.5 ° C. Thus, the flow adjustment valve 69 is controlled to be opened and closed to control the operation of the precooling and preheating coil 52. Specifically, when the water temperature measured by the water thermometer 67 is 13.5 ° C. or higher, that is, when the wet bulb temperature of the processing target air 51 in the water spray chamber 60 is WB 13.5 ° C. or higher, the flow rate adjustment valve 69 is closed. When the water temperature measured by the water thermometer 67 is 13.5 ° C. or lower, that is, when the wet bulb temperature of the processing target air 51 in the water spray chamber 60 is WB 13.5 ° C. or lower, the flow rate adjustment valve 69 is opened and the opening degree Control.

  Here, the fundamental operation of the present invention will be described again. In an air washer capable of sufficient gas-liquid contact, when the processing target air 51 is humidified by evaporation of the water sprayed on the water spray chamber 60 of the casing 50, the processing target is deprived of the heat of evaporation (heat of vaporization). The temperature of the air 51 decreases asymptotically to saturated air, and the water that comes into contact with the processing target air 51 becomes substantially equal to the dew point temperature (wet bulb temperature) of the processing target air 51.

  Therefore, the water to be treated is sprayed and humidified on the processing target air 51 in the water spray chamber 60, and the water is captured and separated from the processing target air 51, and the water temperature is measured by the thermometer 67 using the captured and separated water as measurement water. The dew point of the processing target air 51 that is saturated can be accurately measured.

  For this reason, in the air conditioner shown in the present embodiment, the pre-cooling and pre-heating coil 52 sprays the water to be treated from the spray nozzle 61 at the upstream position of the water spray chamber 60 on the processing target air 51, Water is captured and separated from the processing target air 51 by the washer media 62 at a downstream position, and the water temperature is measured with a thermometer 67 using the captured and separated water as measurement water, and the water temperature of the measured water is a constant temperature, here the wet bulb temperature WB13. The temperature of the processing target air 51 is adjusted by the precooling and preheating coil 52 so as to maintain 5 ° C.

  By the way, the air flowing through the water spray chamber 60 of the casing 50 is not necessarily in a uniform state, and its temperature distribution is not uniform. For this reason, when the temperature or dew point of the air flowing through the casing 50 is measured at one fixed point in the casing 50, the measured value is an index that appropriately indicates the overall or average state of the air to be measured. There is no guarantee.

  However, since the washer medium 62 has a trapping surface having a size substantially equal to the cross-sectional area of the air flow path in the water spray chamber 60 of the casing 50, the water to be trapped and separated by the washer media 62 is stored in the water spray chamber 60. It reflects the temperature of the processing target air 51 in each part of the cross section of the air flow path, collects the collected and separated water, and measures the water temperature as the measuring water with the water temperature meter 67, so that the processing target air 51 as a whole or It becomes an index that appropriately indicates the average state, and the dew point of the processing target air 51 can be accurately measured.

  In the present embodiment, the water temperature of the water in the water tank 63 is measured. As shown in FIG. 7, a water tank 82 for measurement is separately provided at the lower end position of the washer medium 62, and this water tank 82 for measurement is provided. Measurement accuracy is improved by collecting only the water flowing down from the washer media 62 as measurement water and measuring the water temperature. Further, as shown in FIG. 8, it is desirable that the water temperature meter 67 is measured at a water collection part (outflow part) in the water tank 82.

  The processing target air 51 that has passed through the air washer 53 flows into the cooling coil 54. The cooling coil 54 controls the flow adjustment valve 78 to open and close using the measured value as a control index so that the measured value of the first dry thermometer 58 becomes DB12.5 ° C., and controls the supply of cold water by the cold water supply system 77. The air to be treated 51 is reduced in temperature and dehumidified by the cooling. That is, as shown in FIG. 4, the state of the processing target air 51 changes from the point (3) to the point (4) along the saturated air line, and during this time, the dry bulb temperature decreases to DB12.5 ° C. As a result of dehumidification, the absolute humidity is reduced to saturated air with a dew point temperature of 12.5 ° C.

The reheating coil 55 controls the opening and closing of the flow rate adjustment valve 80 using the measured value as a control index so that the measured value of the second dry thermometer 59 becomes DB23 ° C., and controls the supply of hot water by the hot water supply system 79. The processing target air 51 is heated by the heating. That is, as shown in FIG. 4, the state of the processing target air 51 is changed from the point (4) to the point (5) while keeping the absolute humidity constant, and the dry bulb temperature rises to DB23 ° C.
(Peak season of heating season)
The controller 81 for control has the wet-bulb temperature of the process target air 51 measured with the wet thermometer 57 provided in the air introduction part of the casing 50 below WB14 degreeC, and can obtain absolute humidity required in the operation | movement of an intermediate period. If this is not possible, operate during the peak season of the heating season.

  For example, as shown in FIG. 6, when the intake outside air is 0 ° C. DB and 50% relative humidity, in order to obtain a predetermined wet bulb temperature WB 13.5 ° C., it is necessary to heat the dry bulb temperature to DB 33 ° C. At the temperature of the hot water in the hot water supply system 72 (about 30 ° C.), the pre-cooling and pre-heating coil 52 does not reach the predetermined wet bulb temperature WB 13.5 ° C. in the preheating coil 52, and as a result, the water tank 63 measured by the water temperature meter 67. When the water temperature cannot be maintained at 13.5 ° C. and the required absolute humidity cannot be obtained by equal enthalpy humidification, heating and humidification is performed as an operation as a peak period of the heating season.

  Therefore, the control controller 81 closes the on-off valves 71 a and 71 b and opens the on-off valves 73 a and 73 b so that warm water can be precooled from the hot water supply system 72 and supplied to the preheating coil 52. 69 is opened to precool the hot water and supply it to the preheating coil 52, and the flow rate adjusting valve 76 is opened to supply the hot water to the heat exchanger 66 to heat the water flowing through the water supply system 64, and the spray nozzle The temperature of the water sprayed from 61 is raised.

  The air diagram of FIG. 5 shows the state of the processing target air 51 at each position (1) to (5) of the casing 50 when the air conditioner is operated at the peak of the heating season. Due to the operation of the fan device 56, the processing target air 51 flowing from the air introduction portion of the casing 50 is heated by the precooling and preheating coil 52 and then flows into the air washer 53.

  That is, as shown in FIG. 5, the state of the processing target air 51 changes from the point (1) to the point (2), and reaches the dry bulb temperature DB25 ° C. shown as an example here. At this dry bulb temperature DB of 25 ° C., the predetermined wet bulb temperature WB is not 13.5 ° C.

  For this reason, in the air washer 53, the flow rate adjustment valve 76 is opened, the supply pump 65 is operated, the water in the water tank 63 is heated by the heat exchanger 66, supplied to the spray nozzle 61, and sprayed from the spray nozzle 61. The processing target air 51 in the water spray chamber 60 is heated and humidified with the heated water. That is, as shown in FIG. 5, the processing target air 51 transitions from the point (2) to the point (3) and becomes saturated air having a wet bulb temperature WB of 13.5 ° C.

  The water captured and separated from the processing target air 51 by the washer medium 62 is caused to flow down to the water tank 63 through the washer medium 62 and sprayed again in the water spray chamber 60, and the water spray chamber 60 and the water tank 63 are circulated. For this reason, the water is brought into contact with the processing target air 51 in the air of the water spray chamber 60, so that the water temperature becomes substantially the same as the wet bulb temperature of the processing target air 51 and flows down to the water tank 63.

  The control controller 81 has a water temperature measured by the water temperature meter 67 of 13.5 ° C., that is, the wet bulb temperature of the processing target air 51 passing through the washer medium 62 at the most downstream position of the water spray chamber 60 is WB 13.5 ° C. As described above, the flow adjustment valve 76 is controlled to be opened and closed to control the operation of the heat exchanger 66, and the temperature of the water sprayed from the spray nozzle 61 is adjusted.

  Specifically, when the water temperature measured by the water thermometer 67 is 13.5 ° C. or higher, that is, when the wet bulb temperature of the processing target air 51 in the water spray chamber 60 is WB 13.5 ° C. or higher, the flow rate adjustment valve 76 is closed. When the water temperature measured by the water thermometer 67 is 13.5 ° C. or lower, that is, when the wet bulb temperature of the air 51 to be treated in the water spray chamber 60 is WB 13.5 ° C. or lower, the flow rate adjustment valve 76 is opened and the opening degree is adjusted. Control.

  When the heated water is sprayed on the water spray chamber 60 and the processing target air 51 is heated and humidified, the processing target air 51 is heated by the sensible heat of the water, while the water is deprived of evaporation heat (heat of vaporization) and saturated. The temperature decreases until air (dew point) is reached, and the unevaporated water that has come into contact with the processing target air 51 becomes substantially equal to the dew point temperature (wet bulb temperature) of the processing target air 51.

  Therefore, the water to be treated is sprayed on the treatment target air 51 in the water spray chamber 60 to be heated and humidified, and the water is captured and separated from the treatment target air 51, and the water temperature is measured by the thermometer 67 using the captured and separated water as measurement water. By doing so, the dew point of the processing target air 51 that has been saturated can be accurately measured.

  For this reason, in the air conditioner shown in the present embodiment, the water to be treated heated by the heat exchanger 66 is sprayed from the spray nozzle 61 at the upstream position of the water spray chamber 60 to the air to be treated 51 heated by the precooling and preheating coil 52. Then, the water is captured and separated from the processing target air 51 by the washer medium 62 at the downstream position of the water spray chamber 60, the water temperature is measured by the thermometer 67 using the captured and separated water as measurement water, and the water temperature of the measurement water is a constant temperature. Here, the temperature of the water sprayed by the heat exchanger 66 is adjusted so as to maintain the wet bulb temperature WB of 13.5 ° C.

  The processing target air 51 that has passed through the air washer 53 flows into the cooling coil 54. The cooling coil 54 controls the flow adjustment valve 78 to open and close using the measured value as a control index so that the measured value of the first dry thermometer 58 becomes DB12.5 ° C., and controls the supply of cold water by the cold water supply system 77. The air to be treated 51 is reduced in temperature and dehumidified by the cooling. That is, as shown in FIG. 5, the state of the processing target air 51 changes from the point (3) to the point (4) along the saturated air line, and during this time, the dry bulb temperature decreases to DB12.5 ° C. As a result of dehumidification, the absolute humidity is reduced to saturated air with a dew point temperature of 12.5 ° C.

  The reheating coil 55 controls the opening and closing of the flow rate adjustment valve 80 using the measured value as a control index so that the measured value of the second dry thermometer 59 becomes DB23 ° C., and controls the supply of hot water by the hot water supply system 79. The processing target air 51 is heated by the heating. That is, as shown in FIG. 5, the processing target air 51 changes its state from the point (4) to the point (5) while keeping the absolute humidity constant, and the dry bulb temperature rises to DB23 ° C.

  As described above, in the air conditioner in the present embodiment, the temperature of the processing target air 51 is measured by the wet thermometer 57, and the cold water supply system 70 and the hot water supply system are compared in the comparison between the measured wet bulb temperature value and the set value. By switching 72, it is possible to automatically perform appropriate switching between hot water and cold water between the intermediate period of the cooling season and the intermediate period of the heating season.

  By heating the water with the heat exchanger 66 and spraying with hot water from the spray nozzle 61, exhaust heat at a low temperature (about 30 ° C.) such as a refrigerator can be effectively utilized. Further, by using the pre-cooling and pre-heating coil 52, which is a single coil, for both pre-cooling and pre-heating, air resistance can be reduced and pressure loss can be reduced.

  The measurement of the processing target air 51 is not necessarily uniform in temperature distribution, and accurate measurement is difficult, but the water temperature of the water tank 63 having substantially the same temperature as the wet bulb temperature of air can be measured accurately and stably. Accurate control is possible. In addition, the water is captured and separated by the washer media 62 having a capture surface having a size substantially equal to the cross-sectional area of the air flow path in the water spray chamber 60 of the casing 50, so that the water is the air in the water spray chamber 60. It reflects the temperature of the processing target air 51 in each part of the cross section of the flow path, collects the collected and separated water, and measures the water temperature as measurement water with the water temperature gauge 67, so that the water temperature is the entire processing target air 51, Or it becomes a parameter | index which shows an average state appropriately, and the dew point of the process target air 51 can be measured correctly. Therefore, air conditioning control using a hot water spray air washer can be stably performed without using a dew point sensor, and initial costs and maintenance costs can be reduced. Further, since the saturated air that has surely reached the dew point is dehumidified by the cooling coil 54, the air at the outlet of the cooling coil 54 has a relative humidity of 100%, and the dry bulb temperature and the dew point temperature are equal. Therefore, the dry thermometer 58 can be used as a sensor, and maintenance is unnecessary.

  Each temperature described in the embodiment is based on the condition that the outlet air condition at point (5) is DB23 ° C., 50 to 55% RH, and water is about 30 ° C. However, the temperature is limited to this. is not.

The schematic diagram which shows the air conditioner in embodiment of this invention Airline diagram showing operation in peak season of cooling season in air conditioner of same embodiment Air line diagram showing the operation in the middle of the cooling season in the air conditioner of the embodiment Air line diagram showing operation in the middle of the heating season in the air conditioner of the embodiment Airline diagram showing operation in peak season of heating season in air conditioner of same embodiment Airline diagram when operating at peak time of heating season with equal enthalpy humidification in the air conditioner of the embodiment The schematic diagram which shows the structure of the water tank in other embodiment of this invention The schematic diagram which shows the structure of the water tank in other embodiment of this invention Schematic diagram showing a conventional air conditioner Air diagram showing the cooling season operation of the air conditioner

Explanation of symbols

50 Casing 51 Air to be Processed 52 Precooling, Preheating Coil 53 Air Washer 54 Cooling Coil 55 Reheating Coil 56 Fan Device 57 Wet Thermometer 58 First Dry Thermometer 59 Second Dry Thermometer 60 Water Spray Chamber 61 Spray Nozzle 62 Washer media 63 Water tank 64 Water supply system 65 Supply pump 66 Heat exchanger 67 Water temperature meter 68 Heat medium supply system 68a Feed pipe 68b Return pipe 69 Flow rate adjusting valve 70 Cold water supply system 70a Feed pipe 70b Return pipe 71a, 71b Open / close valve 72 Hot water supply system 72a Feed pipe 72b Return pipe 73a, 73b Open / close valve 75 Water heating medium supply system 75a Feed pipe 75b Return pipe 76 Flow rate adjustment valve 77 Cold water supply system 77a Feed pipe 77b Return pipe 78 Flow adjustment valve 79 Hot water supply system 79a Feed pipe Path 79b Return line 80 Flow rate adjustment valve 81 Controller 82 Water tank

Claims (10)

In an air conditioner that ventilates air to be treated in a casing, water to be treated is sprayed from the spraying means to the air to be treated heated by the air temperature adjusting means at an upstream position in the casing, and the air to be treated at a downstream position in the casing. The water is captured and separated from the water, the water temperature is measured using the water separated and measured as the measurement water, and the temperature of the processing target air is adjusted by the air temperature adjusting means so that the water temperature of the measurement water is maintained at a constant temperature. Air conditioning control method. In an air conditioner that ventilates the air to be treated in the casing, the water to be treated heated by the air temperature adjusting means is sprayed from the spray means at the upstream position in the casing to the air to be treated heated by the air temperature adjusting means. The water is captured and separated from the processing target air at the downstream side of the water, and the water temperature is measured using the captured and separated water as measurement water, and the temperature of the water sprayed from the nozzle is adjusted so that the water temperature of the measurement water is kept constant. An air conditioning control method characterized by adjusting by a temperature adjusting means. The air conditioning control according to claim 1 or 2, wherein the air to be treated is substantially saturated air between an upstream position where the water is sprayed and a downstream position where the water is captured and separated from the air to be treated. Method. 3. The air conditioning control method according to claim 1, wherein the temperature of the measurement water is maintained at the same temperature as a predetermined wet bulb temperature of air. In an air conditioner that ventilates the air to be treated in the casing, the air temperature adjusting means for adjusting the temperature of the air to be treated in the casing, and the air to be treated heated by the air temperature adjusting means at the upstream position in the casing. The measured value of the water temperature measuring means, the water temperature measuring means that captures and separates the water from the air to be treated at the downstream position in the casing, measures the water temperature using the captured water as measurement water, and the water temperature measuring means is constant. An air conditioner comprising: control means for controlling temperature adjustment of the air to be processed by the air temperature adjusting means so as to maintain the temperature. In an air conditioner for passing air to be processed in a casing, an air temperature adjusting means for heating the air to be processed in the casing, a water temperature adjusting means for adjusting the temperature of the water, and a processing object heated by the air temperature adjusting means Spray means for spraying the water heated by the water temperature adjusting means to the air at an upstream position in the casing, and capturing and separating the water from the processing target air at the downstream position in the casing, and using the captured and separated water as measurement water An air conditioner comprising: a water temperature measuring unit that measures a water temperature; and a control unit that controls temperature adjustment of the water by the water temperature adjusting unit so that a measurement value of the water temperature measuring unit maintains a constant temperature. The water temperature measuring means measures the water temperature by using the capturing means for capturing and separating water from the processing target air at a downstream position in the casing, the water tank for storing the water captured and separated by the capturing means, and the water in the water tank as measurement water. It has a water thermometer, The air conditioner of Claim 5 or 6 characterized by the above-mentioned. The air conditioner according to claim 6, wherein the capturing means has a capturing surface having a size substantially equal to a cross-sectional area of the air flow path in the casing. The air conditioner according to claim 5 or 6, wherein the air to be treated is substantially saturated air between an upstream position where the water is sprayed and a downstream position where the water is separated from the air to be treated. . The air conditioner according to claim 5 or 6, wherein the control means performs control so that the water temperature of the measured water becomes equal to a predetermined wet bulb temperature of the air.

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