JP2005257166A - Air conditioner control system and air conditioner control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save energy for air conditioning without requiring enormous troubles and costs. <P>SOLUTION: In a man-machine 9, a current temperature value detected by a temperature sensor 7 in each room is inputted, and, when this temperature value is lower than 22°C, a preset temperature value is defined as 22°C, and is outputted to a DDC8. When the current temperature value exceeds 26°C, the preset temperature value is defined as 26°C, and outputted to the DDC 8. When the current temperature value is between 22°C to 26°C, the present temperature value is defined as a temperature value detected by the temperature sensor 7, and outputted to the DDC 8. The DDC 8 controls the valve opening of a cooled water valve 5 or a hot water valve 6 based on a difference between the preset temperature value and current temperature value outputted from the man-machine 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air conditioner control system and an air conditioner control method for controlling an air conditioner in a building.

Conventionally, air conditioning control in a building has been performed on air conditioners installed in a plurality of rooms by a program incorporated in a DDC (Direct Digital Controller) or an electric / electronic controller. ing. When the building is a large-scale building, several tens to several hundreds of air conditioner control devices (DDC, etc.) are installed in various locations in the building (see, for example, Patent Document 1). The set temperature value, which is the control target value for each air conditioner control device, is input by the administrator via a monitoring screen such as a CRT screen in a monitoring room, etc., and input to each air conditioner control device by transmission or the like. It is common. In a four-pipe air conditioner often used in buildings, either the cooling operation or the heating operation by the air conditioner is automatically performed so that the indoor air temperature matches the set temperature value.
Japanese Patent Laid-Open No. 9-296950

  However, in the intermediate period, that is, in seasons other than summer and winter, the air temperature control system described above is used for the summer temperature in many cases, although the indoor air temperature can often be maintained at just the right temperature by air blowing by the air conditioner. The air conditioner is controlled to perform the heating operation or the cooling operation so as to follow the set temperature value (for example, 26 degrees Celsius) or the set temperature value for winter (for example, 22 degrees Celsius). I was consuming.

  For example, if the air conditioner is operating at a set temperature value of 26 degrees Celsius from the summer, and the fall season is maintained with this set temperature value maintained, the room temperature will drop below 26 degrees Celsius without cooling the room. Even in such a case, in the four-pipe air conditioner, when the room temperature is lower than the set temperature value, the heating operation is performed so that the room temperature becomes the same as the set temperature value.

  When this heating operation is performed with the output of hot water from the hot water valve, it is conceivable to mechanically close the hot water valve to prevent unnecessary heating operation, but the temperature further decreases in winter. Therefore, heating operation is required. Therefore, after changing the set temperature value to a temperature value for winter, it is necessary to operate so that the hot water comes out again from the hot water valve.

  In order to avoid this problem, the set temperature value, which is one point, is set to two points: a set temperature value for summer (for example, 26 degrees Celsius) and a set temperature value for winter (for example, 22 degrees Celsius). Conventionally used is a control (zero energy band control) that closes both the cold water valve and the hot water valve when the temperature is between the set temperature values.

  However, since this zero energy band control must be performed for each air conditioner using DDC, the hardware configuration of DDC distributed in various places in the building can be used to control the closing of the cold water and hot water valves. Need to be modified. Therefore, a large work is required and the cost is increased. Further, when the current air conditioner control device is an analog control device, it is necessary to update it to DDC by renovation work. Therefore, labor and cost are further increased.

  Accordingly, an object of the present invention is to provide an air conditioner control system and an air conditioner method that can save energy for air conditioning without requiring much labor and cost.

  That is, an air conditioner control system according to the present invention includes an air conditioner, temperature value detection means for detecting a temperature value in a room air-conditioned by the air conditioner, and a temperature value detected by the temperature value detection means. An air conditioner control means for controlling the air conditioner so as to match a set temperature value, and when the temperature value detected by the temperature value detection means is less than a predetermined first temperature value, The set temperature value of the air conditioner control means is set as the first temperature value, and when the detected temperature value exceeds the second temperature value larger than the first temperature value, the set temperature value is set as the second temperature value. If the detected temperature value is not less than the first temperature value and not more than the second temperature value, the set temperature value is set to the detected temperature value. And a control means.

  In the air conditioner control system according to the present invention, when it is determined that the temperature value detected by the temperature value detecting means is between the predetermined first temperature value and the second temperature value, the air conditioner The set temperature value of the control means is the temperature value detected by the temperature value detection means. That is, since the temperature value detected by the temperature value detecting means is the same as the set temperature value, the air conditioner control means does not control the cooling operation and the heating operation by the air conditioner. Therefore, since it is possible to perform the same control as the conventionally known zero energy band control without changing the hardware configuration of the air conditioner control device, the energy required for air conditioning can be reduced without much effort and cost. Can be saved.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration example of an air conditioner control system according to an embodiment of the present invention.
This air conditioner control system is a system used in a building such as a building where an air conditioner is installed, and the four-pipe air conditioner main body 1 is installed in each of a plurality of rooms such as the rooms 11 and 12 in the building. .

  The air conditioner body 1 includes a cooling coil (C / C) 2, a heating coil (H / C) 3, and a blower 4. The cooling coil (C / C) 2 is connected to the cold water valve 5, and the heating coil (H / C) 3 is connected to the hot water valve 6.

  Each room in the building is provided with an indoor temperature sensor (TE) 7. The temperature sensor 7, the cold water valve 5, the hot water valve 6, and the blower 4 in the air conditioner main body 1 are connected to a DDC (Direct). (Digital Controller: Direct Digital Controller) 8 is connected. The DDC 8 is provided for each air conditioner body 1 in each room and controls the air conditioner body 1. That is, the DDC 8 drives and controls the blower 4 and also the deviation between the current temperature value, that is, the temperature value detected by the temperature sensor 7 (room temperature), and a preset temperature value (target temperature value) set in advance. Based on the above, the opening degree of the cold water valve 5 and the hot water valve 6 is controlled so that the temperature value detected by the temperature sensor 7 matches the set temperature value, and the cold water is supplied to the cooling coil (C / C) 2. The amount and the amount of hot water supplied to the heating coil (H / C) 3 are adjusted. For example, when the temperature value detected by the temperature sensor 7 is lower than the set temperature value, the valve opening degree of the hot water valve 6 is controlled, and when the temperature value detected by the temperature sensor 7 is higher than the set temperature value, The valve opening degree of the valve 5 is controlled.

  In addition, as described above, the DDCs 8 provided for the plurality of indoor air conditioner bodies 1 are connected to the man machine 9 via the transmission line 10 so as to be communicable. The man machine 9 is installed, for example, in a monitoring room of a building, calculates the set temperature value corresponding to the DDC 8 in each room, and also detects the set temperature value and the temperature value detected by the temperature sensor 7 in each room. Monitor display such as.

  Based on the temperature value detected by the temperature sensor 7, the man machine 9 calculates a set temperature value in the room where the temperature sensor 7 is provided, and outputs this to the DDC 8 via the transmission line 10. In the DDC 8, the set temperature value output from the man machine 9 is acquired, and the valve opening degree of the cold water valve 5 and the hot water valve 6 is controlled based on the set temperature value.

FIG. 2 is a block diagram showing a configuration example of the DDC 8 shown in FIG.
As shown in FIG. 2, the DDC 8 includes a control unit 81, an input / output interface 82, and a set temperature value memory 83, and the control unit 81 receives temperature value information input from the temperature sensor 7 via the input / output interface 82. The temperature is output to the man machine 9, and the set temperature value from the man machine 9 is input via the input / output interface 82. Based on the deviation between the set temperature value and the temperature value from the temperature sensor 7, the valve described above is used. A signal for controlling the opening is output to the cold water valve 5 and the hot water valve 6. The set temperature value memory 83 stores set temperature value data. The data stored in the set temperature value memory 83 is overwritten and updated according to the control of the control unit 81 every time the set temperature value information calculated by the man machine 9 is input via the input / output interface 82.

  Next, the procedure of air conditioner control by the above-described air conditioner control system will be described with reference to the flowchart shown in FIG. Unlike the conventionally used zero energy band control based on the two set temperature values, this air conditioner control system has 1 in 1 man machine 9 which is a device installed at one upper side of the system. In the DDC 8 provided corresponding to the air conditioner main body 1 in each room after incorporating the program for calculating the set temperature value of the value, the set temperature value from the man machine 9 is input, and this is converted into cold water The set temperature value is used for valve opening control of the valve 5 and the hot water valve 6.

  First, the current temperature value, that is, the temperature value detected by the temperature sensor 7 is acquired by the man machine 9 via the DDC 8 and the transmission path 10 (step S1). Then, the man machine 9 determines whether or not the temperature value acquired by the process of step S1 is 22 degrees Celsius or more at a predetermined time interval (step S2).

  As a result of the determination in step S2, if it is determined that the current temperature value is less than 22 degrees Celsius (NO in step S2), the set temperature value is set to 22 degrees Celsius, and this value is transmitted via the transmission line 10. It outputs to DDC8 (step S3, S7).

  As a result of the determination in step S2, if it is determined that the current temperature value is 22 degrees Celsius or more (YES in step S2), whether or not the temperature value acquired by the process in step S1 is 26 degrees Celsius or less. Is determined (step S4).

  As a result of the determination in step S4, when it is determined that the current temperature value exceeds 26 degrees Celsius (NO in step S4), the set temperature value is set to 26 degrees Celsius, and this value is set to DDC8 via the transmission line 10. (Steps S5 and S7).

  As a result of the determination in step S4, when it is determined that the current temperature value is 26 degrees Celsius or less (YES in step S4), that is, the temperature values acquired by the process in step S1 are 22 degrees Celsius and 26 degrees Celsius. If it is between, the set temperature value is output to the DDC 8 via the transmission line 10 as the temperature value acquired by the process of step S1 (steps S6 and S7).

  In the DDC 8, the set temperature value output from the man machine 9 by the process of step S 7 is input, and the data stored in the set temperature value memory 83 is overwritten and updated with this value as the new set temperature value data. That is, in the DDC 8, the set temperature value is calculated to be 22 degrees Celsius by the process of Step S3, and when this is input from the man machine 9, the data stored in the set temperature value memory 83 is set to 22 degrees Celsius. When the set temperature value is calculated to be 26 degrees Celsius by the process of S5 and this is input from the man machine 9, the data stored in the set temperature value memory 83 is set to 26 degrees Celsius.

  In the control unit 81 of the DDC 8, the valve of the cold water valve 5 or the hot water valve 6 is based on the sign of the difference between the set temperature value stored in the set temperature value memory 83 and the temperature value detected by the temperature sensor 7. The opening degree is calculated by using, for example, PID (proportional / integral / derivative) and the valve opening degree of the cold water valve 5 or the hot water valve 6 is controlled. If the deviation between the temperature value detected by the temperature sensor 7 and the set temperature value stored in the set temperature value 83 is 0 as a result of the control of the valve opening, the cold water valve 5 and hot water calculated by the control unit 81 The valve opening degree of the valve 6 is zero.

  When the temperature value detected by the temperature sensor 7 is input as the set temperature value from the man machine 9 to the DDC 8 by the process of step S6, the temperature value detected by the temperature sensor 7 connected to the DDC 8 and the setting are set. Since the deviation from the set temperature value stored in the temperature value memory 83 is 0, the valve opening calculated by the control unit 81 is 0 (see FIG. 4). That is, since the cold water valve 5 and the hot water valve 6 are fully closed, the cooling and heating operations by the air conditioner body 1 are not performed, and only the blower 4 operates.

  That is, if the current temperature value detected by the temperature sensor 7 is between a predetermined upper limit value (26 degrees Celsius) and a lower limit value (22 degrees Celsius), the cooling operation and the heating operation are performed. Instead, since the air blowing operation which is the operation of only the blower 4 is performed, the energy for operating the cold water valve 5 and the hot water valve 6 becomes unnecessary. Therefore, energy for indoor air conditioning can be saved.

  Of course, even when the air conditioner main body 1 is installed in each of a plurality of rooms in a building, it is possible to calculate a set temperature value suitable for each room. Specifically, when each DDC 8 acquires the temperature value detected by the temperature sensor 7, identification information (for example, “L1”) individually assigned to the air conditioner body 1 to be controlled with respect to this temperature value information. And the like are added to the man machine 9 via the transmission line 10.

  In the man machine 9, the identification information included in the data input from the DDC 8 is stored in a memory (not shown), and the stored identification information is added to the data of the set temperature value calculated as described above and transmitted. Output to path 10. In the DDC 8 in each room, only the data to which the identification information corresponding to the air conditioner main body 1 to be controlled is input among the data output to the transmission path 10 and the set temperature value included in the input data is input. The temperature is stored in the set temperature value memory 83. Thereby, temperature control suitable for each room in a building is attained.

FIG. 5 is a graph showing an example of a change in the average temperature value in the room when the cooling and heating operations are not performed in each season of the year.
As shown in FIG. 5, in spring and autumn, the average temperature is within the permissible comfortable range (here, between 22 and 26 degrees Celsius), and the air blowing operation is performed without performing the cooling and heating operations. The comfort of the room is maintained just by maintaining the temperature. That is, the air conditioner control system according to the embodiment of the present invention is particularly effective for saving energy for air conditioning in the spring and autumn seasons.

  In order to change the existing temperature control system based on only one set temperature value to a system that executes zero energy band control based on two set temperature values, the cold water valve 5 and the hot water valve 6 are In order to perform the closing control, it is necessary to change the control logic and the hardware configuration drastically, and the labor and cost for that need to be greatly changed. However, in the air conditioner control system according to the present embodiment, only the existing one value is set. The hardware configuration is the same as the system that performs control according to the temperature value, and only the programs incorporated in the man machine 9 and the DDC 8 are different. Therefore, the cost for configuring a system that performs the same control as the above-described zero energy band control is significantly reduced.

  Further, since it is not necessary to use a conventional system for performing zero energy band control, even when the air conditioner control device is an analog control device, it is not necessary to update it to DDC by renovation work. That is, energy for air conditioning can be saved without requiring much effort and cost.

  Even if a plurality of devices (DDC8) for controlling the air conditioner 1 are provided as described above, the set temperature value corresponding to each device can be calculated by the man machine 9, so that there are many rooms for air conditioning. It is very effective as an energy saving method for large buildings.

  In addition, the program for calculating the set temperature value by the air conditioner control system may be executed by being incorporated in the existing man machine itself as described above, or using an open protocol or the like for the existing man machine. A personal computer (PC) may be connected separately, and a program may be incorporated into the PC and executed.

  In the embodiment described above, when the temperature value detected by the temperature sensor 7 is in a predetermined range, the temperature value detected by the temperature sensor 7 is set as the set temperature value. Whether or not a value such as (Predicted Mean Vote) or discomfort index is within a predetermined range is determined by the man machine 9, and when this value is within the predetermined range, the temperature sensor 7 detects the value. The set temperature value may be output to the DDC 8 as a set temperature value.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The block diagram which shows the structural example of the air conditioner control system according to embodiment of this invention. The figure which shows the structural example of DDC of the air conditioning machine control system shown in FIG. The flowchart which shows the procedure of the air conditioning machine control by the air conditioning machine control system shown in FIG. The figure which showed the relationship between the valve opening degree of a cold water valve and a warm water valve, and temperature value by DDC shown in FIG. The figure which showed in a graph the example of a change of the average temperature value of a room | chamber interior when not performing air_conditioning | cooling and heating operation in each season of the year.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 4 pipe type air conditioner main body, 2 ... Cooling coil (C / C), 3 ... Heating coil (H / C), 4 ... Blower, 5 ... Cold water valve, 6 ... Hot water valve, 7 ... Indoor temperature sensor (TE 8) DDC (Direct Digital Controller), 9 ... Man machine, 10 ... Transmission path.

Claims (3)

An air conditioner,
Temperature value detection means for detecting the temperature value of the room where air conditioning is performed by this air conditioner;
An air conditioner control means for controlling the air conditioner so that the temperature value detected by the temperature value detection means matches the set temperature value;
When the temperature value detected by the temperature value detection means is less than a predetermined first temperature value, the set temperature value of the air conditioner control means is set as the first temperature value, and the detected temperature If the value exceeds a second temperature value that is greater than the first temperature value, the set temperature value is taken as the second temperature value, and the detected temperature value is greater than or equal to the first temperature value, and An air conditioner control system comprising: a set temperature value control means for setting the set temperature value as the detected temperature value when the temperature is equal to or lower than the second temperature value. The air conditioner and the temperature value detecting means are respectively provided in a plurality of rooms,
The air conditioner control means is provided for each air conditioner in each room,
The set temperature value control means is communicably connected to an air conditioner control means provided for the plurality of air conditioners, and controls the set temperature value of each air conditioner control means. The air conditioner control system according to claim 1. An air conditioner, temperature value detecting means for detecting a temperature value in the room air-conditioned by the air conditioner, and the air conditioner so that the temperature value detected by the temperature value detecting means matches a set temperature value. An air conditioner control method used in an air conditioner control system having an air conditioner control means for controlling a machine,
When the temperature value detected by the temperature value detection means is less than a predetermined first temperature value, the set temperature value of the air conditioner control means is set as the first temperature value, and the detected temperature If the value exceeds a second temperature value that is greater than the first temperature value, the set temperature value is taken as the second temperature value, and the detected temperature value is greater than or equal to the first temperature value, and An air conditioner control method comprising: a set temperature value control step for setting the set temperature value as the detected temperature value when the temperature is equal to or lower than the second temperature value.

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