JP2007232331A - Air-conditioning control method and air-conditioning control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning control method and an air-conditioning control device, which achieve more energy saving by efficiently performing dead zone control in an air-conditioning system comprising an outdoor unit and an indoor unit. <P>SOLUTION: The air-conditioning control method or device comprises the outdoor unit and the indoor unit, and controls indoor temperature and humidity by exhausting at least a part of indoor air while keeping the rest as circulating air, and taking outside air corresponding to exhaust air, into the circulating air to mix them. The temperature and humidity of outside air is controlled so that the temperature and humidity of a mixture of the outside air and circulating air is an upper limit value or a lower limit value of tolerance width of a predetermined value. For this purpose, the target temperature and humidity of outside air before controlled by the outdoor unit, and the temperature and humidity of the circulating air before mixed, are measured, and the temperature and humidity of outside air are computed from the temperature difference and humidity difference for control. When the mixture of the outside air and circulating air is within the tolerance width of the predetermined value, the control of the indoor unit is stopped. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air-conditioning control method and an air-conditioning control apparatus that exhaust a part of circulating indoor air and mix external air suitable for the exhaust to control indoor temperature and humidity within a predetermined range.

  In an air conditioning system such as a clean room, in order to keep the indoor air cleanliness constant and maintain the concentration of harmful solvents below a certain level, in general, a part of the air circulating in the room is exhausted, and the air corresponding to the exhausted amount is discharged to the outside. Is taken from. In this case, the air taken in from the outside (hereinafter referred to as the outside air) and the air recirculated into the room (hereinafter referred to as the environment) are mixed and controlled to a predetermined temperature and humidity (hereinafter referred to as temperature and humidity). And blown into the room.

  The conventional general air conditioning system mentioned above is shown with a conceptual diagram as shown in FIG. 5, for example. This air conditioning system includes an air conditioner 2 that supplies air adjusted to a predetermined temperature and humidity to a clean room 1, an outside air duct 3 that takes in outside air, and an air supply duct 4 that supplies air adjusted to a predetermined temperature and humidity to the clean room 1. An air duct 5 for taking out the air to be recirculated from the clean room 1 and an exhaust duct 6 for exhausting a part of the indoor air to the outside. The air conditioner 2 adjusts the air (hereinafter, referred to as an air-fuel mixture) in which the amount of outside air commensurate with the exhaust gas and the circulating air are mixed to a predetermined temperature and humidity and blows it out to the clean room 1.

The air conditioner 2 includes a filter 8 that removes fine particles such as dust and dust, a cooling coil 9, a heating coil 10, a humidifying coil 11, and a blower fan 12. The cooling coil 9 is supplied with cold water or the like for cooling from the refrigerator, the heating coil 10 is supplied with hot water or steam for heating from the boiler, and the humidifying coil 11 is supplied with water for humidification, Steam or the like is supplied. The supply of cold water, hot water, steam and the like is performed by the supply valves 13, 14, and 15 so that the values measured by the thermometer 7 a ₁ and the hygrometer 7 b ₁ installed in the clean room 1 become predetermined values. The opening is controlled by PID controllers 16, 17, and 18. Sensor signals from the thermometer 7 a ₁ and the hygrometer 7 b ₁ are input to the selector 19.

  In the above air conditioning control system, as shown in the humid air diagram of FIG. 6, the temperature and humidity in the clean room 1 are set as the target point P, and the outside air or the air-fuel mixture is set as the H point of higher temperature and humidity. In this case, as shown by the dotted line, the outside air or the air-fuel mixture is first cooled from point H to point M that intersects the curve axis of 100% relative humidity (becomes the dew point temperature). Next, the air is cooled and dehumidified to the point N that is the absolute humidity of the target point P along the curve axis of 100% relative humidity, and thereafter, the excessively cooled portion is returned to the target point P by heating. Further, it is assumed that the outside air or the air-fuel mixture is an L point lower than the target point P. In this case, first, as shown by a dotted line, heating is performed from point L to point K of the temperature of the target point P, then humidified so as to reach the absolute humidity of the target point P, and controlled to reach the target point P. Is done.

According to the temperature and humidity control described above, for example, energy E ₁ adjusted from H to M, energy E ₂ adjusted from M to N, energy E adjusted from N to P on the path from the H point to the P point. ₃ is required. However, normally, in an air conditioning system, an allowable tolerance range as indicated by a frame S is set for a target point. For example, the temperature (dry bulb temperature) is 24 ° C. at the temperature and humidity of the control target point. Assume that ± 3 ° C. and humidity (relative humidity) are set to 45% ± 10%. Therefore, instead of controlling from the H point to the central target point P, the shortest path from the H point to the frame S (H → M → N ′ → S), and the shortest path from the L point to the frame S (H There is known a control method (also referred to as dead zone control) in which necessary energy is reduced by performing control according to (M → K ′ → S) (see, for example, Patent Document 1).

  FIG. 7 is a diagram for explaining energy saving by the dead zone control. In the dead zone control, for example, when the target value temperature is 24 ° C. and the tolerance width is set to ± 3 ° C., as shown in FIG. 7A, the upper limit value (27 ° C.) or lower limit of the tolerance width is set. Proportional control is performed until the value (21 ° C.) is reached. In proportional control, in general, a deviation between a target value to be controlled and an actual measurement value is proportionally calculated (P control), integrated (I control), and differential (D control) to control the control target. PID control is used to output the quantity.

  FIG. 7B shows a temperature change state due to dead zone control, and PID control is turned OFF when the upper limit of 27 ° C. is reached by cooling. The temperature is slightly overshooted and cooled to a temperature lower than 27 ° C. However, when the cooling control is turned off, the driving of the cooling coil is stopped and the consumption of energy becomes zero. After that, when the temperature rises and exceeds the upper limit of 27 ° C., the PID control is turned on again and turned off when it reaches 27 ° C., and thereafter this ON and OFF are repeated. The same applies to the lower limit 21 ° C., and PID control ON / OFF by heating is repeated. The humidity dead zone control by dehumidification and humidification is performed in the same manner.

  In contrast to the dead zone control described above, normal control is as shown in FIGS. 7C and 7D. That is, cooling or heating PID control is performed until the target temperature reaches 24 ° C., and then overshooting by ON and OFF is repeated at the temperature of 24 ° C. For this reason, the control time until the target value is reached is prolonged, energy consumption for that is large, and ON / OFF control centering on the target value is frequent.

  Also, it is known that an air conditioner uses an internal air conditioner that controls the temperature and humidity of the mixture of the ambient air and the outside air and an external air conditioner that controls the temperature and humidity of the outside air (for example, Patent Document 2 and Patent Document 2). 3). FIG. 8 is a diagram illustrating an example of a conventional air conditioning system using an internal air conditioner and an external air conditioner. In addition, detailed description is abbreviate | omitted by using the same code | symbol for the part which has the same function as the air-conditioning system shown in FIG. 5, Moreover, it is a part which has the function similar to an internal air conditioner with respect to an external air conditioner. It is shown with “a” attached.

  The air conditioning system shown in FIG. 8 is a configuration example in which the external air conditioner 2a is added to the air conditioning system shown in FIG. 5 in the air conditioning control of the clean room 1 or the like, and the internal air conditioner 2, the external air conditioner 2a, the external air duct 3, the external air An air supply duct 3a, an air supply duct 4, an air circulation duct 5 and an exhaust duct 6 are provided. The internal air conditioner 2 is described as “air conditioner” in FIG. 5, but is substantially the same. The air conditioner 2a incorporates an air-fuel mixture in which the outside air adjusted to a value approximating the temperature and humidity blown into the clean room 1 in advance by the external air conditioner 2a and the ambient air from the clean room 1 are mixed, It is readjusted to a predetermined temperature and humidity and blown out into the clean room 1.

The internal air conditioner 2 includes a filter 8 that removes fine particles such as dust and dust, a cooling coil 9, a heating coil 10, a humidifying coil 11, and a blower fan 12. Cooling water or the like for cooling is supplied to the cooling coil 9 from the refrigerator 20, hot water or steam for heating is supplied to the heating coil 10 from the boiler 21, and the humidifying coil 11 is used for humidification. Water, steam, etc. are supplied. These cold water, hot water, steam, and the like are opened in the supply valves 13, 14, 15 so that the temperature and humidity measured by the thermometer 7 a ₁ and the hygrometer 7 b ₁ installed in the clean room 1 become predetermined values. The degree is controlled.

The external air conditioner 2a has the same configuration as the internal air conditioner 2, and includes a filter 8a for removing fine particles such as dust and dust, a cooling coil 9a, a heating coil 10a, a humidifying coil 11a, and a blower fan 12a. The cooling coil 9a is supplied with cold water for cooling from the refrigerator 20, the heating coil 10a is supplied with hot water, steam, etc. for heating from the boiler 21, and the humidifying coil 11a for humidification. Water, steam, etc. are supplied. These cold water, hot water, steam, and the like are supplied to the supply valves 13a and 14a so that the temperature and humidity measured by the thermometer 7a ₂ and the hygrometer 7b ₂ installed at the outlet of the external air conditioner 2a become predetermined values. , 15a are controlled.

As described above, the external air conditioner 2a and the internal air conditioner 2 are provided, and the temperature and humidity of the outside air is adjusted to a predetermined value by the external air conditioner 2a, so that the air / air mixture is controlled by the internal air conditioner 2. In doing so, it is said that the burden on the internal air conditioner 2 can be reduced and energy saving can be realized as a whole.
JP 2004-245552 A JP 2004-245546 A JP 2004-293886 A

  By performing dead zone control as disclosed in Patent Document 1, it is possible to achieve a certain degree of energy saving. However, since the outside air and the ambient air are mixed and controlled by a single air conditioner, the amount of control for cooling / dehumidifying or heating / humidifying is large, and sufficient energy saving cannot be expected with this alone. Further, as disclosed in Patent Documents 2 and 3, a certain degree of energy saving can be expected by adjusting the outside air to a temperature and humidity that approximates the target value in advance using an external air conditioner. However, since the outside air is adjusted to a value close to the target value, the mixture of the outside air and the atmosphere is already adjusted to be close to the target value within the tolerance range at the time of mixing. It was carrying out more control than necessary, leading to useless energy consumption.

  The present invention has been made in view of the above-described circumstances, and is an air conditioning control method and an air conditioning control that can realize more energy saving by efficiently performing dead zone control in an air conditioning system including an external air conditioner and an internal air conditioner. The purpose is to provide a device.

An air conditioning control method and apparatus according to the present invention includes an external air conditioner and an internal air conditioner, exhausts at least a part of room air and circulates the remaining air, and mixes the external air corresponding to the exhaust gas into the air. An air conditioning control method or apparatus for controlling indoor temperature and humidity so that the temperature and humidity of the air-fuel mixture obtained by mixing the outside air and the ambient air are the upper limit value or the lower limit value of the tolerance range of the predetermined value. Control the temperature and humidity of the outside air.
In addition, the air conditioning control according to the present invention measures the target temperature and humidity of the outside air before being controlled by the air conditioner and the temperature and humidity of the ambient air before mixing, and the outside air is determined from the temperature difference and humidity difference. The temperature and humidity are calculated and controlled. When the air-fuel mixture obtained by mixing the outside air and the ambient air is within the tolerance range of the predetermined value, the control of the internal air conditioner is stopped.

  ADVANTAGE OF THE INVENTION According to this invention, it can suppress controlling the temperature / humidity of the external air by an external air conditioning machine more than necessary, and dead zone control can be efficiently implemented in the area | region of the upper limit and lower limit of the tolerance range of a control target. It becomes possible. As a result, it is possible to achieve greater energy savings than in the past.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining an outline of an air conditioning control device according to the present invention, and FIG. 2 is a diagram for explaining an outline of an air conditioning control method according to the present invention. FIG. 3 is a diagram illustrating an example of control of the external air conditioner according to the present invention, and FIG. 4 is a diagram illustrating an example of control of the internal air conditioner according to the present invention. Note that the reference numerals in the figure are simplified by using the same reference numerals for portions having the same functions as those described in FIG.

  In the air conditioning control according to the present invention, for example, an internal air conditioner 2 and an external air conditioner 2a that are individually controlled are used to control the inside of the clean room 1 to a predetermined temperature and humidity (temperature and humidity). The internal air conditioner 2 adjusts the air-fuel mixture obtained by mixing the air circulated from the clean room 1 through the air duct 5 and the outside air adjusted to a predetermined temperature and humidity to a predetermined temperature and humidity. The air-fuel mixture controlled by the internal air conditioner 2 is blown out into the clean room 1 through the air supply duct 4 to maintain the room at a predetermined temperature and humidity. Further, part of the indoor air is exhausted to the outside through the exhaust duct 6, and an amount of outside air corresponding to the exhaust amount is introduced through the outside air supply duct 3a.

8 is used for the internal air conditioner 2 and includes a filter 8 for removing fine particles such as dust and dust, a cooling coil 9, a heating coil 10, a humidifying coil 11, and a blower fan 12. Yes. Cooling water or the like for cooling is supplied to the cooling coil 9 from the refrigerator 20, hot water or steam for heating is supplied to the heating coil 10 from the boiler 21, and the humidifying coil 11 is used for humidification. Water, steam, etc. are supplied. These cold water, hot water, steam, and the like are supplied to the supply valves 13, 14, 15 so that the temperature and humidity measured by the thermometer 7 a ₁ and the hygrometer 7 b ₁ installed in the clean room 1 become predetermined values. The opening is controlled. The opening degree of these supply valves is controlled by a control device 22 having a PLC (Programmable Logic Controller) and PID control means.

  The external air conditioner 2a has the same configuration as the internal air conditioner 2, and includes a filter 8a that removes fine particles such as dust and dust, a cooling coil 9a, a heating coil 10a, a humidifying coil 11a, and a blower fan 12a. The cooling coil 9a is supplied with cold water for cooling from the refrigerator 20, the heating coil 10a is supplied with hot water, steam, etc. for heating from the boiler 21, and the humidifying coil 11a for humidification. Water, steam, etc. are supplied. The opening degree of each supply valve 13a, 14a, 15a is controlled by a control device 22a having a PLC and PID control means so that cold water, hot water, steam and the like have a predetermined temperature and humidity described later.

In the air conditioning control according to the present invention, the thermometer 7a ₄ and the hygrometer 7b ₄ for measuring the temperature and humidity of the air circulated from the clean room 1 are installed, and the temperature and humidity of the outside air introduced into the external air conditioner 2a. A thermometer 7a ₃ and a hygrometer 7b ₃ are installed. The temperature and humidity in the clean room 1 are measured by the thermometer 7a ₁ and the hygrometer 7b ₁ as before, and the temperature and humidity set and adjusted by the external air conditioner 2a are measured at the outlet of the external air conditioner 2a. A thermometer 7a ₂ and a hygrometer 7b ₂ are installed. Sensor signals measured by these thermometers and hygrometers are input to the control device 22 of the internal air conditioner 2 and the control device 22a of the external air conditioner 2a, and predetermined air conditioning control is executed by arithmetic processing.

  Next, an air conditioning control method according to the present invention will be described. Assume that the temperature and humidity of the clean room 1 in FIG. 1 are set with tolerances such that the temperature is 24 ° C. ± 3 ° C. and the relative humidity is 45% ± 10%. When this is shown in a humid air diagram, it becomes as shown in FIG. 2, and the upper limit value (27 ° C.) and lower limit value (21 ° C.) of the temperature around the target point P and the upper limit value (55%) of the relative humidity. A frame S (hereinafter referred to as a tolerance frame S) indicating the lower limit (35%) is set. Normally, the temperature and humidity of the clean room 1 are controlled by the internal air conditioner 2 so as to be inside the tolerance frame S with the target point P as the center. In the present invention, the dead zone as described in FIGS. 6 and 7 is used. Control shall be performed. Further, the mixing ratio of the ambient air and the ambient air is, for example, that the ambient air is “3” and the ambient air is “1”. The mixing ratio of the ambient air and the outside air is arbitrarily set depending on the cleanliness of the clean room 1, the organic solvent to be handled, and the like.

  When the outside air and the atmosphere are mixed, the temperature and humidity of the mixture become an intermediate value corresponding to the mixing ratio. In the wet air diagram of FIG. 2, it is assumed that the temperature and humidity of the surrounding air are at a point J inside the tolerance frame S, and the temperature and humidity of the outside air are at a point R1 that is lower than the set value. The R1 point of the outside air is heated and humidified to, for example, the R1a point by the external air conditioner 2a. Next, the air at point J and the outside air at point R1a are mixed to become a gas mixture at point U1 according to the mixing ratio. The air-fuel mixture at point U1 is controlled to a predetermined value by the internal air conditioner 2 and blown out into the clean room 1 through the air supply duct 4.

  Here, it is assumed that dead zone control as described with reference to FIGS. In this case, when the outside air heated and humidified from the R1 to the R1a point by the external air conditioner 2a and the ambient air at the J point are mixed, the U1 point of the temperature and humidity of the air-fuel mixture is the inside of the tolerance frame S. If it is, the control by the internal air conditioning machine 2 is unnecessary, and it is only necessary to send it to the clean room through the air supply duct 4 by the blower fan 12. However, when the outside air and the atmosphere are mixed, the fact that the U1 point of the mixture is inside the tolerance frame S means that the dead zone control is not fully utilized, and R1 to R1a by the external air conditioner 2a are not utilized. Control would be overheating.

In the present invention, the temperature and humidity of the outlet portion of the outside air are adjusted to the R1a point where the U1 point of the air-fuel mixture comes on the tolerance frame S when the outside air and the atmosphere are mixed. For this reason, at least the temperature and humidity of the atmosphere are measured by the thermometer 7a ₄ and the hygrometer 7b ₄ , the temperature and humidity of the outside air are measured by the thermometer 7a ₃ and the hygrometer 7b ₃ , and the measured value is the external air conditioner 2a. To the control device 22a. Then, the temperature and humidity at the outlet portion of the outside air are set to the above values and controlled by arithmetic processing.

  Further, it is assumed that the outside air is at a point R2 that is higher than the set value. In this case as well, the R2 point of the outside air is cooled and dehumidified to, for example, the R2a point by the external air conditioner 2a. Next, the air at point J and the outside air at point R2a are mixed, and an air-fuel mixture at point U2 corresponding to the mixing ratio is obtained. Then, the temperature and humidity of the outside air are adjusted to a point R2a such that the point U2 indicating the temperature and humidity of the air-fuel mixture comes on the tolerance frame S at the time of mixing.

  Further, it is assumed that the outside air is at the point R3 where the humidity is higher than the set value. Also in this case, the R3 point of the outside air is dehumidified by the external air conditioner 2a to, for example, the R2a point. Next, the air at point J and the outside air at point R3a are mixed to become an air-fuel mixture at point U3 corresponding to the mixing ratio. Even when the outside air is at the R4 point where the humidity is lower than the set value, the outside air conditioner 2a, for example, humidifies to the R4a point, and then the J-point ambient air and the R4a-point outside air are mixed, and the mixing ratio It becomes the U4 air-fuel mixture corresponding to. Then, the temperature and humidity of the outside air are adjusted to the R3a point or the R4a point so that the U3 point or U4 is on the tolerance frame S at the time of mixing.

  As described above, in the external air conditioner 2a, the temperature and humidity of the outside air are not controlled so as to be within the tolerance range of the target value, but are set and adjusted with the temperature and humidity outside the tolerance range. As a result, over-adjustment such as overheating, overcooling, overhumidification, and overhumidification can be eliminated, and wasteful energy consumption can be suppressed and further energy saving can be promoted.

  Further, the adjustment of the temperature and humidity of the outside air by the external air conditioner 2a can be performed by a method as shown in FIG. In FIG. 2, when the tolerance frame S of the set value is set on the wet air diagram, the state of the outside air, for example, eight patterns (1) to (8) including the inside of the tolerance frame S are shown. Suppose. And it becomes possible to implement energy saving efficiently by controlling an external air conditioner according to the state of this outside air. Note that the tolerance frame S shown in FIG. 3 is the same as the tolerance frame S of the temperature and humidity of the air blown from the clean room 1 or the air supply duct 4 controlled by the internal air conditioner 2, but in the external air conditioner 2a, As described with reference to FIG. 2, R1a to R4a are set and adjusted outside the tolerance frame S.

In FIG. 3, the pattern (1) is a case where the temperature and humidity of the outside air are in a region equal to or higher than the upper limit dew point temperature at the point a where the upper limit relative humidity and the upper limit temperature intersect. In this case, the temperature and humidity at the outlet portion of the outside air (portion of the outside air supply duct 3a) are set so as to go to the point a, and cooling, dehumidification, and heating control are performed.
Pattern (2) is a case where the temperature and humidity of the outside air are in a region surrounded by the dew point temperature at or above the point b where the upper limit relative humidity and the lower limit temperature intersect, the upper limit dew point temperature at the point a and below the upper limit relative humidity. . In this case, the temperature and humidity at the outlet portion of the outside air are set so as to go to the upper limit relative humidity line, and cooling, dehumidification, and heating control are performed. In this case, only the cooling control may be performed without performing the dehumidification control.

The pattern (3) is a case where the temperature and humidity of the outside air is in a region surrounded by the dew point temperature of the point d where the lower limit relative humidity and the upper limit temperature intersect, the upper dew point temperature of the point a and the upper limit temperature. In this case, the temperature and humidity at the outlet portion of the outside air are set so as to reach the upper limit temperature, only cooling control is performed, and dehumidification control is not performed.
Pattern (4) is a case where the temperature and humidity of the outside air are in a region surrounded by the dew point temperature below the point d and the upper limit temperature or more. In this case, the temperature and humidity at the outlet portion of the outside air are set so as to go to point d, and cooling control and humidification control are performed.

Pattern (5) is a case where the temperature and humidity of the outside air are in a region surrounded by the lower limit relative humidity or lower, the upper limit temperature or lower, and the lower limit temperature or higher. In this case, the temperature and humidity at the outlet portion of the outside air is set so as to go to the line of the lower limit relative humidity, and the temperature control for cooling or heating is not performed, and only the humidification control is performed.
Pattern (6) is a case where the temperature and humidity of the outside air are in a region surrounded by the dew point temperature at or below the point c where the lower limit relative humidity and the lower limit temperature intersect and below the lower limit temperature. In this case, the temperature and humidity at the outlet portion of the outside air are set so as to go to the point c, and heating control and humidification control are performed.

Pattern (7) is a case where the temperature and humidity of the outside air are in a region surrounded by the dew point temperature of the b point or lower, the upper dew point temperature of the c point or higher and the lower limit temperature or lower. In this case, it sets so that it may go to a minimum temperature, only heating control is performed, and humidification control is not performed.
Pattern (8) is a case where the temperature and humidity of the outside air falls within the tolerance frame S of the set value in the clean room 1, and in this case, neither temperature control nor humidity control is performed.

  The adjustment of the temperature and humidity of the blown air (substantially the same as the temperature and humidity of the clean room 1) by the internal air conditioner 2 can be performed by dead zone control as shown in FIG. For example, as shown in FIG. 2, it is assumed that the target range of the air conditioning control in the clean room 1 is set, for example, to a temperature of 24 ° C. ± 3 ° C. and a relative humidity of 45% ± 10%. For the temperature control, for example, a cooling PID control means is used for cooling, and a heating PID control means is used for heating. When the temperature of the blown air falls within a temperature range between the upper limit value (27 ° C.) and the lower limit value (21 ° C.) of the control target of the clean room 1, the dead zone control stops the control of the PID control means, The heating or cooling drive operation of the controller 2 is stopped.

  Similarly, humidity control uses, for example, a dehumidifying PID control means when dehumidifying, and a humidifying PID control means when humidifying. When the humidity of the blown air falls within the humidity range between the upper limit value (55%) and the lower limit value (35%) of the control target of the clean room 1, the dead zone control stops the control of the PID control means, The dehumidification or humidification drive operation of the controller 2 is stopped.

  In addition to the dead zone control described above, if the temperature and humidity of the air-fuel mixture when the outside air and the ambient air are mixed as described with reference to FIG. Is at the boundary of whether to enter the dead zone control, which is the state in which the dead zone control can be most efficiently performed. Moreover, adjusting the temperature and humidity of the outside air so that the temperature and humidity of the air-fuel mixture are on the upper limit or lower limit region of the tolerance range of the target value will limit excessive control by the external air conditioner, This means that the external air conditioner is driven most efficiently. Therefore, both the external air conditioner and the internal air conditioner can be operated most efficiently, and greater energy saving can be realized as compared with the conventional case.

  According to the present invention, the power cost of 60 to 70% can be reduced by setting the tolerance range of temperature and humidity to ± 3 ° C. for temperature and ± 15% for humidity. Also, if the temperature and humidity tolerance range is ± 2 ° C for temperature and ± 10% for humidity, the power cost can be reduced by around 50%, and the tolerance range for temperature and humidity is ± 1 ° C for temperature and ±± for humidity. In the case of 5%, it was possible to reduce the power cost by 30 to 40%.

It is a figure explaining the outline of the air-conditioning control device by the present invention. It is a figure explaining the outline of the air-conditioning control method by this invention. It is a figure explaining an example of control of the external air handler in the present invention. It is a figure explaining an example of control of the internal air handler in the present invention. It is a figure explaining an example of the conventional air-conditioning control apparatus. It is a figure explaining an example of the conventional air-conditioning control method. It is a figure explaining the energy saving by the conventional dead zone control. It is a figure explaining an example of the air-conditioning control apparatus provided with the conventional internal air conditioner and the external air conditioner.

Explanation of symbols

1 ... Clean Room, 2 ... inner conditioner, 2a ... outer conditioner, 3 ... outside air duct, 4 ... supply duct, 5 ... ring duct, 6 ... exhaust duct, _7a 1 ～7A 4 _... thermometer, _7b 1 ~ 7b ₄ ... Hygrometer, 8, 8a ... Filter, 9, 9a ... Cooling coil, 10, 10a ... Heating coil, 11, 11a ... Humidification coil, 12, 12a ... Blower fan, 13-15, 13a-15a ... Supply valve , 20 ... refrigerator, 21 ... boiler, 22, 22a ... control device.

Claims (4)

An external air conditioner and an internal air conditioner are provided, and at least a part of the indoor air is exhausted to circulate the remainder, and the ambient air that matches the exhaust is taken in and mixed to control the indoor temperature and humidity. An air conditioning control method,
An air conditioning control method for controlling the temperature and humidity of the outside air so that the temperature and humidity of the air-fuel mixture obtained by mixing the outside air and the ambient air are equal to an upper limit value or a lower limit value of a tolerance range of a predetermined value. .   Measure the temperature and humidity of the outside air before being controlled by the air conditioner and the temperature and humidity of the ambient air before mixing, and calculate the target temperature and humidity of the outside air from the temperature difference and humidity difference. The air conditioning control method according to claim 1, wherein control is performed.   3. The air conditioning control method according to claim 1, wherein the control of the internal air conditioner is stopped when an air-fuel mixture obtained by mixing the outside air and the atmosphere is within a tolerance range of the predetermined value. . Air conditioning control that includes an external air conditioner and an internal air conditioner, exhausts at least a part of the indoor air and circulates the remaining air, and mixes the air with external air suitable for the exhaust to control the indoor temperature and humidity. A device,
Control means for controlling the temperature and humidity of the outside air so that the temperature and humidity of the air-fuel mixture obtained by mixing the outside air and the ambient air become an upper limit value or a lower limit value of a tolerance range of a predetermined value. A featured air conditioning controller.

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