JP2006162151A - Air-conditioning facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively improve both energy-saving performance and amenity by rationalization of night purge operation and cooling operation following the operation. <P>SOLUTION: This air-conditioning facility is provided with an operation control means 10 for inversely calculating the calculation area inside temperature tzx capable of setting a comfortable index value of an object area 1 to a preset target value in the preset reference time Ts after finishing the night purge operation on the basis of a predicted value of a data value except for the intraregional temperature tz, by using an arithmetic operation model of the comfortable index value (a PMV value) with a plurality of kinds of data values rz, tx, v, AL and CL including the intraregional temperature tz of the object area 1 as a parameter; and automatically finishing the night purge operation when the intraregional temperature tz of the object area 1 reduces up to the target intraregional temperature tzm when performing the night purge operation, with this calculation intraregional temperature tzx as the target area inside temperature tzm, or with the intraregional temperature (tzx-Δtz(av)) of adding predetermined correction processing to this calculation intraregional temperature tzx as the target intraregional temperature tzm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner that enables a night purge operation to cool a target area by ventilation with outside air at night.

  Conventionally, for air conditioning equipment that performs night purge operation, night purge operation is started when the temperature or enthalpy of the outside air at night becomes lower than the temperature or enthalpy of the room (that is, the target area), and then the sunrise time zone, etc. The night purge operation is terminated when the set end time set in is reached, and after the night purge operation is completed, the cooling operation is performed when the set cooling start time set according to the indoor usage mode is reached. In general, an operation method such as the following (a) and (b) has been proposed for the night purge operation for the purpose of energy saving.

  (A) Based on the amount of change in the outside air temperature per predetermined time, it is determined whether or not the outside air temperature has sufficiently decreased. If the outside air temperature has sufficiently decreased, the night purge operation is started. Then, based on the amount of change in the room temperature per predetermined time, it is determined whether the room temperature has been sufficiently lowered. If the room temperature has been sufficiently lowered, the night purge operation is terminated.

  (B) A time zone in which the difference between the outside air enthalpy and the indoor enthalpy is maximized is predicted, and the night purge operation is performed in the predicted time zone.

JP 2000-88298 A JP-A-10-246490

  However, in the above methods (a) and (b), although energy saving is achieved by rationalizing the night purge operation, any of the conventional methods including the conventional general method in which the night purge operation is simply terminated at the set end time. Even so, the comfort in the target area at the end of the night purge operation, and consequently the comfort in the target area at the set reference time such as the indoor use start time after the night purge operation ends, is uncertain. Thus, for example, after the night purge operation is finished, the indoor use start time may be reached when the room as the target area is too cold, and there is still room for improvement in terms of comfort.

  In addition, although the comfort in the target area at the end of the night purge operation is uncertain as described above, the cooling operation that consumes energy is unnecessary by starting the cooling operation uniformly at the set cooling start time. There was also room for improvement in terms of energy savings.

  In view of this situation, the main problem of the present invention is to eliminate the above-mentioned problems related to the night purge operation by adopting a rational operation method, and to provide an air conditioning facility that is excellent in both energy saving and comfort. It is in the point to realize.

[1] A first characteristic configuration of the present invention relates to an air conditioning facility,
In air conditioning equipment that enables night purge operation to cool the target area by ventilation with outside air at night,
Within the calculation range where the comfort index value of the target area at the set reference time after the end of the night purge operation can be set as the set target value using a calculation model of the comfort index value using multiple types of data values including the internal temperature of the target area as parameters Back-calculate the temperature based on the predicted value of the data value other than the internal temperature,
Using this calculated area temperature as the target area temperature, or the area temperature obtained by applying a predetermined correction process to this calculated area temperature as the target area temperature, the area temperature in the target area decreases to the target area temperature during the night purge operation. Therefore, an operation control means for automatically terminating the night purge operation is provided.

  In other words, according to the first characteristic configuration, even if there is some error due to an error in the data value or a change in the state of the region from the end of the night purge operation, the temperature in the target region decreases to the target region temperature. When the night purge operation is automatically terminated, the temperature in the target area at the set reference time after the completion of the night purge operation is set to the previously calculated calculated area temperature (that is, the comfort index value at the set reference time is set). The temperature within the target area at the set reference time can be made close to the state assumed in the previous calculation of the temperature within the calculated area. The comfort index value of the target area at the set reference time after the night purge operation is finished can be set to a value close to the set target value.

  Therefore, if a value indicating a certain degree of comfort is set as a setting target value for the comfort index value, a set reference time after the night purge operation (for example, the indoor use start time or a constant value thereof) is set. It is possible to reliably increase the in-region comfort in the target area (before time), and after the night purge operation, the conventional comfort surface such as the indoor use start time when the room is too cold Can effectively avoid problems.

  Also, if the night purge operation is simply terminated in a timely manner as before, the night purge operation will be carried out more than necessary when the outside air is at a low temperature, and the night purge operation requires power. In some cases, excessive night purge operation is a waste of energy, and conversely, the night purge operation becomes insufficient when the outside air is at a relatively high temperature. However, according to the first characteristic configuration, it is possible to effectively avoid the energy waste due to the night purge operation more than necessary or the increase in the required energy for cooling due to insufficient night purge operation. be able to.

  That is, in these respects, according to the first characteristic configuration, it is possible to provide an air conditioning system that is excellent in terms of both energy saving and comfort.

  In the implementation of the first characteristic configuration, the comfort index value includes the PMV value (refer to pages 439 to 443 of the 13th edition, 1st edition of the Air Conditioning and Sanitation Engineering Handbook) as a representative example, and includes the temperature in the target area. Any data may be used as long as a plurality of types of data values are used as parameters.

  Further, in the implementation of the first characteristic configuration, the predicted value of the data value used for the reverse calculation of the temperature in the calculation range is a value that causes the operation control unit to perform a predictive calculation based on a past value or a measured value at a near time, or the operation control unit Any of the fixed values stored in advance may be used.

[2] The second characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the first characteristic configuration.
The operation control means, as the correction process, a temperature obtained by subtracting a predicted value of a temperature difference between the temperature in the target area at the end of the night purge operation and the temperature in the target area at the set reference time from the temperature in the target area The point is that the temperature is used.

  That is, according to the second feature configuration, the temperature obtained by subtracting the predicted value of the temperature difference (that is, the predicted value of the temperature rise in the region from the end of the night purge operation to the set reference time) from the calculated region temperature is calculated. Since the temperature in the target area falls to the target area temperature and the night purge operation ends, even if there is an increase in the area temperature due to an increase in the number of people in the area or the amount of solar radiation, the temperature In the state where the rise is also expected, the temperature at the set reference time after the end of the night purge operation can be brought to a temperature close to the temperature within the calculated range, and within the range from the end of the night purge operation to the set reference time. Regardless of the temperature rise, the comfort index value of the target area at the set reference time can be more reliably set to a value close to the set target value. It can be obtained even higher certainty.

  In the implementation of the second feature configuration, the predicted value of the temperature difference used in the correction process is a value that is predicted by the operation control unit based on the past value or a measured value at a near time, or is stored in advance in the operation control unit. Any of fixed values may be used.

[3] The third characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the first or second characteristic configuration.
When the temperature inside the target area rises to the set cooling start temperature after the end of the night purge operation, or after the end of the night purge operation, The cooling operation is automatically started when the set cooling start value is reached.

  That is, according to the third feature configuration, after the night purge operation is finished, when the temperature in the target area rises to the set cooling temperature due to an increase in the number of people in the area or the amount of solar radiation, or the comfort index of the target area Since the cooling operation is started when the value reaches the set cooling start value, unnecessary cooling operation can be effectively performed compared to simply starting the cooling operation at the set cooling start time after the completion of the night purge operation as before. On the contrary, when necessary, the cooling operation can be started at an early stage, thereby making it possible to obtain an air conditioning system that is more excellent in terms of energy saving and comfort.

[4] The fourth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of any of the first to third characteristic configurations,
The set target value of the comfort index value is a value indicating the comfort level on the low temperature side in the region than the value indicating the highest comfort level among the comfort index values.

  That is, according to the fourth feature configuration, the comfort index value setting target value (that is, the comfort index value target value realized at the set reference time after the end of the night purge operation) is the highest among the comfort index values. The amount of the target area obtained at the set reference time is the amount of the night purge operation according to the first to third characteristic configurations with the value indicating the comfort level on the low temperature side (that is, the cold side) in the region than the value indicating the comfort level. Although the comfort is slightly lowered, the start of the cooling operation can be delayed correspondingly, and the energy saving can be improved.

  And, as the setting target value of the comfort index value, select a suitable value according to various conditions, etc. with a value indicating the comfort level on the low temperature side in the region than the value indicating the highest comfort level among the comfort index values By doing so, it is possible to achieve both energy saving and comfort in a form most suited to the specific purpose of use of the air conditioning equipment.

[5] A fifth characteristic configuration of the present invention relates to an air conditioning facility,
In air conditioning equipment that enables night purge operation to cool the target area by ventilation with outside air at night,
During the night purge operation, when the set end time is reached, the night purge operation is automatically terminated,
For monitoring or predicting the change in cooling load in the target area from the end of the night purge operation, the preceding start time of the cooling operation required to keep the internal temperature in the target area at the target internal temperature at the set reference time after the completion of the night purge operation An operation control means that automatically determines the cooling operation at the preceding start time after the end of the night purge operation is provided.

  In other words, according to the fifth feature configuration, the night purge operation ends in a timely manner at the set end time (for example, the sunrise time of each day obtained from the Japan Meteorological Agency data), but the set reference time after the night purge operation ends By starting the cooling operation at the preceding start time required to keep the temperature in the target area at the target temperature in the above, the internal temperature in the target area at the set reference time after the end of the night purge operation is set to the target internal temperature. Can be close to temperature.

  Therefore, if an appropriate temperature is set as the target area temperature, the in-region comfort in the target area at the set reference time after the night purge operation (for example, the indoor use start time or a certain time before it) is ensured in terms of temperature. Can be expensive.

  Also, since the preceding start time of the cooling operation is determined based on monitoring or prediction of the change in cooling load in the target area from the end of the night purge operation, the cooling operation is simply performed at the set cooling start time after the end of the night purge operation as before. Compared to the start, unnecessary cooling operation can be effectively avoided, and in these respects, according to the fifth feature configuration, the air conditioning equipment is excellent in terms of both energy saving and comfort. be able to.

[6] The sixth feature configuration of the present invention specifies an embodiment suitable for the implementation of the fifth feature configuration.
The operation control means uses a calculation model of a comfort index value using a plurality of types of data values including the temperature in the target area as a parameter, and within the calculation range where the comfort index value of the target area at the set reference time can be set as the set target value. Back-calculate the temperature based on the predicted value of the data value other than the internal temperature,
This is that the preceding start time of the cooling operation is determined by using the calculated temperature in the target area as the target temperature.

  That is, according to the fifth feature configuration, since the fifth feature configuration is performed with the above-described calculated region temperature as the target region temperature, the region temperature in the target region at the set reference time after the completion of the night purge operation, It is possible to make the temperature close to the previously calculated temperature within the calculated region (that is, the temperature within the region where the comfort index value at the set reference time is set as the set target value) by the above reverse calculation, and the internal state of the target region at the set reference time It is possible to make the state close to the state assumed in the reverse calculation of the temperature in the calculated region, thereby making the comfort index value of the target region close to the set target value at the set reference time after the end of the night purge operation. it can.

  Therefore, if a value indicating a certain degree of comfort is set as a setting target value for the comfort index value, a set reference time after the night purge operation (for example, the indoor use start time or a constant value thereof) is set. The in-region comfort in the target area (before time) can be made even higher than in the method of simply selecting an appropriate temperature as the target area temperature, thereby further improving comfort. Air conditioning can be made.

  As with the first feature configuration, in the implementation of the sixth feature configuration, the comfort index value is a PMV value as a representative example, and any data value including a plurality of types of data values including the internal temperature of the target region may be used. It may be something like this.

  Further, in the implementation of the sixth feature configuration, the predicted value of the data value used for the reverse calculation of the temperature in the calculation range is a value that causes the operation control means to perform a predictive calculation based on a past value, a measured value at a near time, or the like, or the operation control means Any of the fixed values stored in advance may be used.

[First Embodiment]
FIG. 1 shows air conditioning equipment on each floor in a building, and an underfloor space in a target area 1 used as an office or the like is an underfloor air supply chamber 3 that supplies air to the target area 1 through a plurality of floor outlets 2. The ceiling of the target area 1 is provided with a plurality of ceiling exhaust ports 4.

  Reference numeral 5 denotes a machine room adjacent to the target area 1. In this machine room 5, an air conditioner 7 (air handling unit) equipped with a cooling fan, a heating coil, a humidifier and the like and equipped with an air supply fan 6 is installed. In the cooling operation or heating operation, the air SA adjusted in temperature and humidity by the air conditioner 7 is supplied to the underfloor air supply chamber 3 by the air supply fan 6, so that the adjusted air SA is supplied from the floor outlet 2 to the target area 1. To cool or heat the target area 1.

  Reference numeral 8 denotes a return air duct that returns the area air RA discharged from the target area 1 through the ceiling exhaust port 4 to the air conditioner 7 as the air blows out from the floor outlet 2. The mixed air of the air RA and the outside air OA guided by the outside air intake duct 9 is adjusted in temperature and humidity, and the temperature and humidity adjusted air SA is supplied to the underfloor air supply chamber 3.

  The outside air OA guided by the outside air intake duct 9 is preliminarily adjusted by an adsorption type external air conditioner (desiccant air conditioner) or the like, and a part of the return air RA guided by the return air duct 8 is used. The air volume corresponding to the outside air introduction volume from the outside air intake duct 9 is exhausted to the outside.

  S1 is an internal temperature sensor that detects an internal temperature tz of the target area 1, S2 is an internal humidity sensor that detects an internal humidity rz (relative humidity) of the target area 1, and 10 is a controller that controls the operation of the air conditioning equipment. The controller 10 adjusts the cooling temperature of the air conditioner 7 based on the detection information of the temperature sensor S1 in the cooling operation to adjust the temperature tz in the target area 1 to the set temperature tzs, while in the heating operation. By adjusting the heating output and humidification output of the air conditioner 7 based on the detection information of the in-region temperature sensor S1 and the in-region humidity sensor S2, the in-region temperature tz in the target region 1 is adjusted to the set in-region temperature tzs and the in-region of the target region 1 The humidity rz is adjusted to the set range humidity rzs.

  Further, the ceiling of the target area 1 is equipped with a plurality of ceiling fans 11, and the comfort of the target area 1 is provided by giving an appropriate air flow feeling to the persons in the target area 1 by operating the ceiling fan 11. It is trying to raise.

  In this air conditioning equipment, the night purge operation is performed to reduce the cooling load (especially, the cooling load at the start of the cooling operation) of the target region 1 and to save energy by cooling the target region 1 by ventilation with the outside air OA at night. As an incidental facility for this purpose, as shown in FIGS. 1 and 2, an outside air port 13 for taking in the outside air OA for night purge into the target area 1 through the outside air introduction passage 12 under the floor is provided below the window in the outside wall portion. An outside air damper 14 is provided to open and close the outside air introduction path 12.

  In addition, the corridor 15 on the corridor side in the target area 1 is configured to be opened and closed by a drive mechanism as an open / close damper, and further, a ventilation window that is opened and closed by a drive mechanism as an exhaust damper in the building portion of the staircase 17 communicating with the corridor 16. 18 is provided.

  That is, in this air conditioner, when the temperature of the outside air OA decreases at the night when the cooling operation is finished, the outside air damper 14, the interspace 15 and the ventilation window 18 are opened as shown in FIG. In addition, the warm air RA in the target area 1 is discharged to the outside through the transom part 15, the corridor 16, the staircase 17, and the ventilation window 18, and accordingly, the low-temperature nighttime outside air OA is targeted through the outside air introduction path 12 and the outside air port 13. A night purge operation in the form of natural ventilation introduced into the chamber 1 is performed.

  The controller 10 also controls the operation control of the night purge operation in addition to the operation control of the air conditioner 7 in the cooling operation and the heating operation. The controller 10 has an internal temperature tz detected by the internal temperature sensor S1, Based on the internal humidity rz detected by the internal humidity sensor S2, the temperature to the external air OA detected by the external air temperature sensor S3, and the humidity ro of the external air OA detected by the external air humidity sensor S4, the following (A1) to ( The night purge operation is performed by the control operation of A4) and the transition to the cooling operation is performed (see FIGS. 4 and 5).

  (A1) After completion of the cooling operation on each day (for example, after 19:00), the enthalpy ho of the outside air OA is calculated based on the outside temperature to and the outside humidity ro detected, and the detected inside temperature tz and Based on the internal humidity rz, the enthalpy hz of the internal air RA in the target area 1 (hereinafter referred to as the internal enthalpy hz) is calculated.

  Then, the calculated outside air enthalpy ho and the in-region enthalpy hz are compared, and the outside air temperature to and the in-region temperature tz are compared. As a result of the comparison, the outside air enthalpy ho becomes lower than the in-region enthalpy hz (ho <hz ) And when the outside air temperature to becomes lower than the in-region temperature tz (to <tz), the outside air damper 14, the interspace 15 and the ventilation window 18 are opened to automatically start the night purge operation.

  (A2) The average value rz (av) of the regional humidity rz at the set use start time Ts for the last one week is set for the current day, using the set use start time Ts (for example, business start time) of the target area 1 as a reference time. It is calculated as a predicted value of the internal humidity rz at the set use start time Ts.

  Then, the average value rz (av) of the regional humidity rz, the predicted value of each of the regional radiation temperature tx and the regional wind speed v at the set use start time Ts for each season input in advance as a data table, and each monthly -0.5 (PMV value) using the PMV value of the target area 1 at the set use start time Ts on the current day as the set target value based on the intra-regional metabolism AL and the predicted value CL of the clothing area CL updated and input = -0.5), calculate the PMV value calculation model (PMV value = f (tz, rz, tx, v, AL, CL), Air Conditioning and Sanitary Engineering Handbook 13th edition, 1st edition Page 439 to page 443), and the calculated in-range temperature tzx obtained by this back-calculation is set as the target in-area temperature tzm (= tzx).

  FIG. 6A shows the regional humidity average value rz (av) as the predicted value of the regional humidity rz at the set use start time Ts, at the set use start time Ts for each season inputted in advance as a data table. Predicted values of the regional radiation temperature tx and the regional wind velocity v, the predicted values of the metabolic rate AL and the clothing amount CL of the local person updated and input every month, and the PMV value at the set use start time Ts to −0.5 An example of the calculated in-range temperature tzx (= target in-area temperature tzm) is shown, and FIG. 6B shows an example of the set-in-range temperature tzs for each season used in the cooling operation and the heating operation.

  (A3) After the start of the night purge operation, when the detected internal temperature tz decreases to the target internal temperature tzm (= tzx), the external air damper 14, the interspace 15 and the ventilation window 18 are closed to automatically perform the night purge operation. To finish.

  (A4) After the night purge operation is completed, when the detected in-range temperature tz rises to the set cooling start temperature tzy (≈set in-range temperature tzs), the cooling operation is started.

  That is, in the air conditioning equipment of the first embodiment, when the in-region temperature tz is reduced to the target in-region temperature tzm, the night purge operation is terminated, thereby providing a good in-region comfort with a PMV value close to −0.5. It can be obtained at the set use start time Ts after the purge operation is completed, and the necessary energy for cooling can be effectively saved.

  Further, with regard to the cooling operation accompanied by the operation of the air supply fan 6, the operation is started when the area temperature tz rises to the set cooling start temperature tzy after the completion of the night purge operation, thereby effecting an unnecessary cooling operation. The target value of the PMV value aimed at realization at the set use start time Ts is set to a value indicating the highest degree of comfort among the PMV values. The value indicating the degree of comfort (PMV value = −0.5) indicating the comfort level on the low temperature side (that is, the cold side) than (PMV value = 0) is to allow the start of cooling operation to be delayed, and these Therefore, both energy saving and comfort are obtained.

  As described above, in the first embodiment, the controller 10 is a comfort index value (PMV value) having a plurality of types of data values (rz, tx, v, AL, CL) including the in-region temperature tz of the target region 1 as parameters. The comfort index value (PMV value) of the target area 1 at the set reference time Ts (intra-area use start time) after the end of the night purge operation can be set to the set target value (PMV value = −0.5). The calculated internal temperature tzx is calculated back based on the predicted values of the data values (rz, tx, v, AL, CL) other than the internal temperature tz, and the night purge operation is performed using the calculated internal temperature tzx as the target internal temperature tzm. The operation control means is configured to automatically end the night purge operation when the in-region temperature tz of the target region 1 falls to the target in-region temperature tzm (= tzx).

[Second Embodiment]
FIG. 7 shows the equipment configuration of the air conditioning equipment obtained by modifying a part of the air conditioning equipment shown in the first embodiment. As sensors, the temperature sensor S1, the humidity sensor S2, the outdoor air temperature sensor S3, and the outdoor air humidity sensor S4 are used. In addition, a radiation temperature sensor S5 for detecting the in-region radiation temperature tx of the target area 1 and a wind speed sensor S6 for detecting the in-area wind speed v of the target area 1 are additionally provided.

  The controller 10 is configured to perform the night purge operation and the transition to the cooling operation by the control operations of the following (B1) to (B5) based on the detection information of the sensors S1 to S6 (FIG. 8 and FIG. 8). (See FIG. 3).

  (B1) After completion of the cooling operation on each day (for example, after 19:00), the enthalpy ho of the outside air OA is calculated based on the detected outside air temperature to and outside air humidity ro, and the detected inside temperature tz and Based on the internal humidity rz, the enthalpy hz of the internal air RA in the target area 1 (internal enthalpy hz) is calculated.

  Then, the calculated outside air enthalpy ho and the in-region enthalpy hz are compared, and the outside air temperature to and the in-region temperature tz are compared. As a result of the comparison, the outside air enthalpy ho becomes lower than the in-region enthalpy hz (ho <hz ) And when the outside air temperature to becomes lower than the in-region temperature tz (to <tz), the outside air damper 14, the interspace 15 and the ventilation window 18 are opened to automatically start the night purge operation.

  (B2) Using the set use start time Ts (for example, business start time) of the target area 1 as a reference time, the area humidity rz, the area radiation temperature tx, and the area wind speed v at the set use start time Ts for the last one week The average values rz (av), tx (av), and v (av) are calculated as predicted values of the regional humidity rz, the regional radiation temperature tx, and the regional wind speed v at the set use start time Ts for the current day.

  In addition, the average value Δtz (av) of the temperature difference Δtz between the internal temperature tz at the end of the night purge operation for the last one week and the internal use temperature tz at the set use start time Ts is the predicted value of the temperature difference Δt for the day. Calculate as

  (B3) Intra-regional humidity rz, intra-regional radiation temperature tx, intra-regional wind speed v average values rz (av), tx (av), v (av) obtained in the above calculation, and monthly region stored in the database -0.5 (PMV value = -0.5) with the PMV value of the target area 1 at the set use start time Ts on that day as the set target value based on the predicted values of the metabolic amount AL and the clothing amount CL of the person The calculated temperature tzx in the calculation area is calculated back using the PMV value calculation model, and the temperature obtained by subtracting the average value Δtz (av) of the temperature difference Δtz obtained in the previous calculation from the calculated calculation area temperature tzx. It is set as the target area temperature tzm (= tzx−Δtz (av)).

  (B4) After the start of the night purge operation, when the detected internal temperature tz is reduced to the target internal temperature tzm (= tzx−Δtz (av)), the outside air damper 14, the interspace 15 and the ventilation window 18 are closed and the night The purge operation is automatically terminated.

  (B5) After completion of the night purge operation, the detected internal temperature tz, internal humidity rz, internal radiant temperature tx, internal wind speed v, monthly intra-regional metabolic rate AL and clothing amount CL stored in the database Based on the respective predicted values, the PMV value of the target area 1 is calculated. When the PMV value obtained by this calculation rises to the set cooling start value 0 (PMV value = 0), the cooling operation is started.

  That is, in the air conditioning equipment of the second embodiment, the temperature in the area tz is reduced to the target area temperature tzm by setting the temperature obtained by subtracting the predicted value Δtz (av) of the temperature difference Δtz from the calculated area temperature tzx as the target area temperature tzm. When the night purge operation is completed, the temperature in the target area 1 is increased due to an increase in the number of people in the area and an increase in the amount of solar radiation after the completion of the night purge operation, compared with the air conditioning equipment shown in the first embodiment. In other words, a good in-region comfort with a PMV value close to −0.5 can be obtained more reliably at the set use start time Ts after the end of the night purge operation.

  Further, by starting the cooling operation when the PMV value of the target area 1 becomes 0 after the completion of the night purge operation, a more appropriate timing in terms of comfort compared to the air conditioning equipment shown in the first embodiment. The cooling operation can be started.

  As described above, in the second embodiment, the controller 10 is a comfort index value (PMV value) having a plurality of types of data values (rz, tx, v, AL, CL) including the in-region temperature tz of the target region 1 as parameters. The comfort index value (PMV value) of the target area 1 at the set reference time Ts (intra-area use start time) after the end of the night purge operation can be set to the set target value (PMV value = −0.5). The calculated in-range temperature tzx is back-calculated based on the predicted values of the data values (rz, tx, v, AL, CL) other than the in-area temperature tz, and a predetermined correction process (predicted temperature difference Δtz ( When the temperature obtained by subtracting av) is set as the target internal temperature tzm and the internal temperature tz of the target region 1 decreases to the target internal temperature tzm (= tzx−Δtz (av)) during the night purge operation, the night purge is performed. luck The constituting the operation control means automatically terminate.

[Third Embodiment]
FIG. 9 shows an example in which the control operation of the controller 10 is modified in the air conditioning equipment (see FIG. 7) shown in the second embodiment. In this example, the controller 10 includes an in-region temperature sensor S1 and an in-region humidity sensor S2. Based on the detection information of the outside air temperature sensor S3, the outside air humidity sensor S4, the radiation temperature sensor S5, and the wind speed sensor S6, the night purge operation is performed and the transition to the cooling operation is performed by the control operations (C1) to (C5) below. (See FIGS. 7 and 3).

  (C1) After completion of the cooling operation on each day (for example, after 19:00), the enthalpy ho of the outside air OA is calculated based on the outside temperature to and the outside humidity ro detected, and the detected inside temperature tz and Based on the internal humidity rz, the enthalpy hz of the internal air RA in the target area 1 (internal enthalpy hz) is calculated.

  Then, the calculated outside air enthalpy ho and the in-region enthalpy hz are compared, and the outside air temperature to and the in-region temperature tz are compared. As a result of the comparison, the outside air enthalpy ho becomes lower than the in-region enthalpy hz (ho <hz ) And when the outside air temperature to becomes lower than the in-region temperature tz (to <tz), the outside air damper 14, the interspace 15 and the ventilation window 18 are opened to automatically start the night purge operation.

  (C2) The sunrise time of the day is set as the end time To based on the sunrise time information in the JMA data that is automatically obtained, and when the set end time To is reached after the start of the night purge operation, the outside air damper 14, The space section 15 and the ventilation window 18 are closed, and the night purge operation is automatically terminated.

  (C3) Using the set use start time Ts (for example, business start time) of the target area 1 as the reference time, the area humidity rz, the area radiation temperature tx, and the area wind speed v at the set use start time Ts for the last one week The average values rz (av), tx (av), and v (av) are calculated as predicted values of the regional humidity rz, the regional radiation temperature tx, and the regional wind speed v at the set use start time Ts for the current day.

  (C4) Intra-region humidity rz, intra-region radiation temperature tx, intra-region wind velocity v average values rz (av), tx (av), v (av) obtained in the above calculation, and monthly region stored in the database -0.5 (PMV value = -0.5) with the PMV value of the target area 1 at the set use start time Ts on that day as the set target value based on the predicted values of the metabolic amount AL and the clothing amount CL of the person The calculated in-range temperature tzx is calculated using a PMV value calculation model, and the calculated in-range temperature tzx obtained by this back calculation is set as the target in-area temperature tzm (= tzx).

  (C5) After the end of the night purge operation, the cooling load Q of the target area 1 is sequentially calculated based on the detected internal temperature tz, and the cooling load Q obtained by the calculation and the cooling capacity Qc ( In other words, on the basis of the successive comparison with the cooling load removal capability), the cooling operation required for setting the internal temperature tz of the target area 1 at the set use start time Ts on that day to the target internal temperature tzm obtained by the previous calculation is performed. The preceding start time Tss is determined, and the cooling operation is started at the determined preceding start time Tss.

  That is, in the air conditioning equipment of the third embodiment, unlike the air conditioning equipment of the first and second embodiments, the night purge operation ends in a timely manner at the set end time To (sunrise time), but the night purge operation ends. Based on the subsequent monitoring of the change in cooling load, the preceding start time Tss is automatically determined, and the cooling operation is started at the preceding start time Tss, so that the PMV value is close to −0.5. So that the unnecessary performance of the cooling operation accompanied by the operation of the air supply fan 6 can be effectively avoided, so that energy saving and comfort can be achieved. Both are getting high.

  As described above, in the third embodiment, the controller 10 automatically ends the night purge operation when the set end time To is reached during the night purge operation, and sets the reference time Ts after the night purge operation ends. For the monitoring of the change in the cooling load in the target area 1 from the end of the night purge operation, the preceding start time Tss of the cooling operation required for setting the internal temperature tz of the target area 1 to the target internal temperature tzm at (internal use start time) The operation control means is configured to automatically determine the cooling operation at the preceding start time Tss after the completion of the night purge operation.

  Further, the controller 10 uses a calculation model of a comfort index value (PMV value) having a plurality of types of data values (rz, tx, v, AL, CL) including the in-region temperature tz of the target region 1 as parameters. The calculated in-range temperature tzx at which the comfort index value (PMV value) of the target area 1 at the set reference time Ts (intra-area use start time) after the end of the night purge operation can be set to the set target value (PMV value = −0.5), Based on the predicted values of the data values (rz, tx, v, AL, CL) other than the in-range temperature tz, a calculation is made based on the calculated in-range temperature tzx to determine the preceding start time Tss of the cooling operation. It is.

[Another embodiment]
Next, another embodiment will be listed.
The comfort index value using a plurality of data values including the in-region temperature tz of the target area 1 as a parameter is not limited to PMV, and may be another comfort index value proposed in the air conditioning field. It may be an uncomfortable exponential comfort index value that parameters only the in-region temperature tz and the in-region humidity rz.

  Further, when the PMV value is used as the comfort index value, the set target value of the comfort index value (PMV value) aimed at realization at the set reference time Ts is not limited to 0.5, and is a value indicating a somewhat high comfort level. Any value can be used.

  When the embodiment in which the temperature obtained by adding a predetermined correction process to the calculated internal temperature tzx is used as the target internal temperature tzm, the predetermined correction process includes the internal temperature tz at the end of the night purge operation as shown in the second embodiment. The processing content is not limited to the processing content of subtracting the predicted value of the temperature difference Δt from the in-region temperature tz at the set reference time Ts from the calculated in-region temperature tzx.

  In each of the above-described embodiments, the example in which the time Ts at which use of the target area 1 is started is set as the reference time, but the setting reference time is not limited to the use start time Ts of the target area 1. It may be a certain time before the use start time.

  In the third embodiment, an example is shown in which the night purge operation is ended at the sunrise time with the sunrise time as the set end time To, but instead, a fixed time other than the sunrise time or a time with day change is set to the end. As the time To, the night purge operation may be ended at the set end time To.

  In 3rd Embodiment, although the example which determines the prior | preceding start time Tss of air_conditionaing | cooling operation based on the monitoring of the air_conditioning | cooling load change in the object area 1 from the time of night purge operation completion was shown, it replaces with this, It may be configured to determine the preceding start time Tss of the cooling operation based on the prediction of the cooling load change in the target area 1.

  Further, in order to determine the preceding start time Tss of the cooling operation based on the monitoring or prediction of the cooling load change in the target area 1 from the end of the night purge operation, the specific determination method is the method shown in the third embodiment. However, various modifications are possible.

  In each of the above-described embodiments, an example of performing the night purge operation by natural ventilation using a specific gravity difference due to a temperature difference is shown, but in the implementation of the present invention, the night purge operation may be performed by forced ventilation by a fan, Further, the ceiling fan 11 provided on the ceiling of the target area 1 has a structure in which an exhaust port 11b is formed in the case 11a as shown in FIG. As indicated by the arrows, the regional air ventilation by the outside air OA may be promoted in such a manner that the regional air RA in the target region 1 is guided to the exhaust port 11b.

  The present invention is not limited to an air conditioner in an office as long as the air purifier performs a night purge operation, but includes various air conditioners such as a school air conditioner, a meeting hall air conditioner, a sports facility air conditioner, and a manufacturing room air conditioner. It can be applied to air conditioning equipment in the field.

Air conditioning equipment configuration diagram Diagram showing the ventilation structure of the entire building Facility configuration diagram showing the state of night purge operation Block diagram showing equipment configuration Flow chart showing control operation of controller Chart showing examples of data values and setting values The block diagram which shows the equipment structure of 2nd Embodiment. The flowchart which shows the control action of the controller in 2nd Embodiment. The flowchart which shows the driving | operation operation | movement of the controller in 3rd Embodiment. Structural diagram of ceiling fan showing another embodiment

Explanation of symbols

OA outside air 1 target area tz area temperature rz data value (area humidity)
tx data value (inside radiation temperature)
v Data value (internal wind speed)
AL data value (metabolism)
CL data value (clothing amount)
PMV comfort index value Ts setting reference time (regional use start time)
tzx Calculation area temperature tzm Target area temperature 10 Operation control means Δtz Temperature difference tzy Set cooling start temperature To Setting end time Tss Preceding start time

Claims (6)

It is an air conditioning facility that enables night purge operation to cool the target area by ventilation with outside air at night,
Within the calculation range where the comfort index value of the target area at the set reference time after the end of the night purge operation can be set as the set target value using a calculation model of the comfort index value that uses multiple types of data values including the temperature in the target area as parameters. Back-calculate the temperature based on the predicted value of the data value other than the internal temperature,
Using this calculated area temperature as the target area temperature, or the area temperature obtained by applying a predetermined correction process to this calculated area temperature as the target area temperature, the area temperature in the target area decreases to the target area temperature during the night purge operation. An air conditioning system provided with operation control means for automatically ending the night purge operation when it is done.   The operation control means, as the correction process, a temperature obtained by subtracting a predicted value of a temperature difference between the temperature in the target area at the end of the night purge operation and the temperature in the target area at the set reference time from the temperature in the target area The air conditioning equipment according to claim 1, wherein the air conditioning equipment is configured to have a temperature.   When the temperature inside the target area rises to the set cooling start temperature after the end of the night purge operation, or after the end of the night purge operation, The air conditioning equipment according to claim 1 or 2, wherein a cooling operation is automatically started when a set cooling start value is reached.   The set target value of the comfort index value is a value indicating the comfort level on the low temperature side in the region than the value indicating the highest comfort level among the comfort index values. Air conditioning equipment. It is an air conditioning facility that enables night purge operation to cool the target area by ventilation with outside air at night,
When the set end time is reached during the night purge operation, the night purge operation is automatically terminated,
For monitoring or predicting the change in cooling load in the target area from the end of the night purge operation, the preceding start time of the cooling operation required to keep the internal temperature in the target area at the target internal temperature at the set reference time after the completion of the night purge operation An air conditioner provided with operation control means for automatically starting the cooling operation at the preceding start time after the night purge operation is determined. The operation control means uses a calculation model of a comfort index value using a plurality of types of data values including the temperature in the target area as a parameter, and within the calculation range where the comfort index value of the target area at the set reference time can be set as the set target value. Back-calculate the temperature based on the predicted value of the data value other than the internal temperature,
6. The air conditioning equipment according to claim 5, wherein the preceding start time of the cooling operation is determined using the calculated in-region temperature as the target in-region temperature.

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