JP2004132669A - Air-conditioning control apparatus and operation control method of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning control apparatus capable of securing comfortableness inside a room and saving energy. <P>SOLUTION: This apparatus is provided with an operation setting means determining one of temperature and humidity of target environment for air-conditioning control when the other is maintained constant so as make an index being calculated on the basis of the temperature and the humidity of the target environment and indicating comfortableness of the environment within a predetermined range, and a control means controlling operation of an air conditioner on the basis of the temperature or the humidity determined by the operation setting means. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an air conditioning control technique for maintaining a comfortable room.
[0002]
[Prior art]
Conventionally, in order to maintain indoor comfort, a cooling operation or a heating operation is performed based on a set temperature (set temperature) to perform air conditioning control. In this case, since the control is performed based only on the room temperature, there is a problem that, for example, even when the temperature in the room is appropriate, when the humidity is high, a person is uncomfortable.
Therefore, an air-conditioning control device that calculates an index indicating the comfort of the environment, for example, an unpleasant index from the indoor temperature and humidity and performs operation control based on the calculated unpleasant index has been developed (for example, Patent Literature 1, Patent Literature 2)
[0003]
Further, an air-conditioning system has been developed in which a temperature and humidity range (hereinafter, referred to as a comfortable range) at which comfort is obtained based on the degree of discomfort is determined in advance, and the temperature and humidity are set so as to be within the comfortable range. In this air conditioning system, when determining the temperature and the humidity, considering the energy efficiency of each of the four operation modes of the humidifying operation, the heating operation, the dehumidifying operation, and the cooling operation in the air conditioner, the operation load of the air conditioner is minimized. (For example, see Patent Document 3).
[0004]
[Patent Document 1]
JP-A-6-180137
[Patent Document 2]
JP-A-6-147585
[Patent Document 3]
JP-A-11-108418
[0005]
[Problems to be solved by the invention]
However, the conventional technology has the following problems.
In the air-conditioning control device that performs operation control based on the fluctuation of the discomfort index, when the set temperature is fixed and the air-conditioning control is performed based on the discomfort index, as shown in FIG. Since the control is performed so that the room temperature approaches the set temperature following the rise and fall of the air temperature), the decrease and rise of the room temperature are repeated, and the fluctuation range of the room temperature is widened. For this reason, the change in the perceived temperature increases, and a comfortable state cannot be maintained.
Further, the opening and closing of the chilled / hot water valve is frequently changed so that the return air temperature approaches the set temperature in response to the rise and fall of the room temperature, so that the operating load of the air conditioner increases and energy saving (energy saving) is achieved. Can not be realized.
[0006]
In the air conditioning system that determines the set temperature and the set humidity so that the operation load of the air conditioner is minimized, the energy efficiency of each of the four operation modes of the humidifying operation, the heating operation, the dehumidifying operation, and the cooling operation in the air conditioner is determined. However, there is a problem in that the calculation for determining the operation load of the air conditioner to be minimized is complicated.
Therefore, the present invention has been made to solve the above-described problems and problems of the conventional technology, and an object of the present invention is to provide air conditioning control that can secure indoor comfort and realize energy saving (energy saving). It is to provide a device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the air-conditioning control device according to the present invention is calculated based on the temperature and humidity of the environment to be air-conditioned and controls the air-conditioning control so that the index indicating the comfort of the environment is within a predetermined range. When one of the temperature or the humidity of the environment is constant, an operation setting unit that determines the other of the temperature and the humidity, and a control unit that controls the operation of the air conditioner based on the temperature or the humidity determined by the operation setting unit. It is provided with.
In this way, the operation control of the air conditioner is performed based on the index indicating the comfort of the environment calculated from the temperature and humidity of the environment to be air-conditioned.
[0008]
Further, the predetermined range is selected from a plurality of index ranges prepared in advance.
By doing so, an index range for performing operation control in accordance with the balance between energy saving and comfort is selected.
For example, the index range is determined according to comfort required for an environment to be air-conditioned. For example, depending on the index range, a normal mode, an energy saving mode, and a comfort mode are provided.The normal mode has an index range that provides normal comfort, the energy saving mode has an index range that offers low comfort but can save energy, and the comfort mode has comfort. It is good also as the index range which becomes high.
Further, the index is a discomfort index.
[0009]
Further, the control method of the air conditioner according to the present invention is a temperature / humidity detecting step of detecting the temperature and humidity of the environment to be air-conditioned and is calculated based on the temperature and humidity of the environment to be air-conditioned and indicates the comfort of the environment. In the case where one of the temperature and the humidity detected by the temperature and humidity detection step is fixed so that the index is within a predetermined range, the temperature and humidity determination step of determining the other of the temperature and the humidity is determined by the temperature and humidity determination step. And an operation control step of controlling the operation of the air conditioner based on the temperature or humidity obtained.
In this way, the operation control of the air conditioner is performed based on the index indicating the comfort of the environment calculated from the temperature and humidity of the environment to be air-conditioned.
[0010]
Further, the predetermined range is a method in which the predetermined range is selected from a plurality of index ranges prepared in advance.
In this manner, an index range for performing operation control is selected.
Furthermore, this index is a method of setting the discomfort index.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
In all the drawings for describing the embodiments, parts having the same functions are denoted by the same reference numerals, and repeated description will be omitted.
[0012]
FIG. 1 is a configuration diagram of an air conditioning system showing an embodiment of the present invention. The air conditioning control system includes an air conditioner 1 that transfers heat generated by a heat source (not shown) to a control target to perform cooling / heating, and an air conditioning controller 2 that controls the air conditioner 1.
First, the air conditioner 1 will be described.
The air conditioner 1 is connected to the room 5 by an air supply (SA) duct 13 and a return air (RA) duct 14, and includes an air filter 1-1, a cold water coil 1-2, and a hot water coil 1-3. , A humidifier 1-4 and a FAN (blower) 1-5. A11 and return air R. from room 5 A as the intake air, the temperature and humidity of the intake air are adjusted. As A, supply to room 5. Here, the return air R. A uses the damper 8-1 to open the outside air O.A. A11 controls the amount of intake by dampers 8-2, 8-3, 8-4 and FAN10-1.
[0013]
In addition, a cold water valve 6-1 is provided in a supply path of cold water to the cold water coil 1-2, and a hot water valve 6-2 is provided in a supply path of hot water to the hot water coil 1-3. A humidifier control valve 7 is provided in a supply path of steam to 4. By controlling the opening of these valves, the air supply S.V. The temperature and humidity of A are controlled.
Further, a temperature sensor 3 and a humidity sensor 4 are provided in the return air duct 14, and the temperature and humidity in the return air duct 14 are measured. The measured temperature and humidity are input to the air conditioning control device 2.
[0014]
Further, an exhaust duct 15 is connected to the room 5, and exhaust can be performed by the dampers 8-5, 8-6, 8-7, 8-8, and the FANs 10-2 and 10-3.
For example, when performing outside air cooling control, that is, when outside air O.D. A11, when cooling is performed, exhaust EX. Since it is not necessary to exchange heat with A12, the total heat exchanger (HEX) 9 is turned off, the dampers 8-4 and 8-5 are fully closed, and the dampers 8-3, 8-6 and 8-8 are opened. Air conditioning control is performed by degree control.
When the outside air cooling control is not performed, the dampers 8-4 and 8-5 are fully opened, the dampers 8-3 and 8-6 are fully closed, and the FANs 10-1, 10-2, and 10-3 are operated. The outside air is supplied to the heat exchanger 9. Exhaust EX. Heat exchange with A12 is performed. By doing so, energy saving is achieved.
[0015]
Next, the air conditioning control device 2 will be described with reference to FIG. FIG. 2 shows an example in which the temperature information and the humidity information of the return air duct 14 detected by the temperature sensor 3 and the humidity sensor 4 are input, the set temperature is determined, and the cold water valve 6-1 or hot water is determined based on the determined set temperature. It is a functional block diagram for explaining the function of the air conditioning control device 2 that controls the opening degree of the valve 6-2.
The air-conditioning control device 2 includes a temperature input unit 2-1, a humidity input unit 2-2, an index calculation unit 2-3, a set temperature determination unit 2-4, a selection setting unit 2-5, and a control unit 2- 6 and a display unit 2-7.
[0016]
Here, the temperature input unit 2-1 receives the temperature information of the return air duct 14 from the temperature sensor 3 as an input, and converts the input temperature information of the return air duct 14 into an index calculation unit 2-3 described later and a control described later. Input to section 2-6.
The humidity input unit 2-1 receives the humidity information of the return air duct 14 from the humidity sensor 4 as input, and converts the input humidity information of the return air duct 14 into an exponent calculation unit 2-3 to be described later and a set temperature determination unit to be described later. Enter 2-4.
[0017]
The index calculation unit 2-3 calculates an index (hereinafter, referred to as an index) indicating environmental comfort from the input temperature information and humidity information of the return air duct 14. As the index, for example, a discomfort index is used. Hereinafter, a case where this discomfort index is used as an index indicating comfort will be described as an example.
The discomfort index is obtained from the temperature and the humidity by the equation (1).
Index = 0.81T + 0.01H (0.99T-14.3) +46.3 (1)
Here, T is the return air temperature (temperature information of the return air duct 14), and H is the return air humidity (humidity information of the return air duct 14).
[0018]
FIG. 3 shows a processing flow for executing the calculation based on the equation (1). In FIG. 3, PT2 is temperature information of the return air duct 14 input from the temperature input unit 2-1 and PT4 is humidity information of the return air duct 14 input from the humidity input unit 2-2. Here, MUL means multiplication of the input numerical value, SUB means subtraction of the input numerical value, and ADD means addition of the input numerical value.
The exponent calculation unit 2-3 calculates the discomfort index according to this processing flow.
In order to obtain an index from the temperature information of the return air duct 14 and the humidity information of the return air duct 14, an index conversion table as shown in FIG. 4 is provided, and the index is calculated using the index conversion table. Is also good.
Here, the index is determined from the temperature and humidity of the return air duct 14, but may be determined from the room temperature and humidity.
[0019]
The set temperature determination unit 2-4 determines a temperature of the return air duct 14 required for the index to be within a predetermined range (hereinafter, referred to as a required temperature) based on the input humidity information of the return air duct 14. I do.
The set temperature determination unit 2-4 controls the operation according to the balance between energy saving and comfort, so that the energy saving mode setting unit 2-41, the normal mode setting unit 2-42, and the comfort mode setting unit 2-43. Is provided. To explain these, first, the energy saving mode, the normal mode, and the comfortable mode will be described with reference to FIGS.
[0020]
FIG. 5 is a diagram showing the relationship between the return air temperature and the return air humidity and the discomfort index.
The X axis is the return air temperature and the Y axis is the return air humidity. According to FIG. 4, when the discomfort index is 70 or less, everyone is comfortable, but when the discomfort index goes from 70 to 75, some people start feeling uncomfortable, and when the discomfort index goes from 75 to 80, more than half feel uncomfortable, When the discomfort index changes from 80 to 86, everyone feels uncomfortable, and when the discomfort index is 86 or more, it becomes impossible to endure.
[0021]
In the present embodiment, the temperature of the return air duct 14 is controlled according to the curve showing the discomfort index in FIG. Here, paying attention to the discomfort index at which a person who feels discomfort starts to appear, and controlling the air conditioner 1 so that the discomfort index ranges from 72 to 75 with the discomfort index 75 at which more than half of the persons feel discomfort as a boundary. Thus, the temperature of the return air damper is controlled.
In the present embodiment, the control is performed such that the discomfort index is in the range of 72 to 75 by providing three operation modes of the energy saving mode, the normal mode, and the comfortable mode.
[0022]
In the energy saving mode, the required temperature is determined so that the discomfort index is between 74 and 75.
In the normal mode, the required temperature is determined such that the discomfort index is 73 to 74. In other words, the required temperature is determined so as to fall within the region surrounded by the thick line in FIG.
In the comfort mode, the required temperature is determined such that the discomfort index is 72 to 73.
[0023]
FIG. 6 is a diagram in which the boundaries of the operation modes described above are plotted with the humidity information in the return air duct 14 as the X axis and the temperature information as the Y axis. According to FIG. 6, for example, in the energy saving mode, when the humidity is 60%, the required temperature is 26.0 ° C., but when the humidity decreases by 5%, the required temperature can be increased to 26.5 ° C.
[0024]
The energy-saving mode set temperature determination unit 2-41 refers to the index conversion table as shown in FIG. 4 from the input humidity information of the return air duct 14 and requests the required temperature for maintaining the discomfort index from 74 to 75. Is input to the selection setting unit 2-5 as the required energy saving temperature.
The normal mode set temperature determination unit 2-42 refers to an index conversion table as shown in FIG. 4 from the input humidity information of the return air duct 14, and calculates a required temperature for maintaining the discomfort index from 74 to 75. And inputs the required temperature to the selection setting section 2-5 as the normal required temperature.
The comfortable mode setting temperature determination unit 2-43 refers to an index conversion table as shown in FIG. 4 from the input humidity information of the return air duct 14, and requests the required temperature for maintaining the discomfort index from 74 to 75. And inputs the required temperature to the selection setting unit 2-5 as the comfortable required temperature.
[0025]
The selection setting unit 2-5 selects one of the energy saving required temperature, the normal required temperature, and the comfort required temperature based on the set operation mode, and inputs the selected temperature to the control unit 2-6 as the set temperature. I do.
Here, the operation mode may be set in advance by, for example, a BAS (Building Automation System).
In addition, a manual / automatic switching unit (not shown) is provided, and an operation mode selection unit (not shown) for selecting an operation mode when switching to manual operation is provided, so that the operation mode can be manually selected. It may be performed.
[0026]
The control unit 2-6 controls the operation of the air conditioner 1 based on the temperature information of the return air duct 14 input by the temperature input unit 2-1 and the set temperature input by the selection setting unit 2-5. By controlling the temperature inside the return air duct 14 to the set temperature, the room 5 is controlled to be comfortable.
For example, a table of the relationship between the temperature information of the return air duct 14 and the openings of the cold water valve 6-1 and the hot water valve 6-2 is provided in advance, and by referring to this table, the current temperature of the return air duct 14 is obtained. The opening degree in the information and the opening degree at the set temperature are obtained, and the cold water valve 6-1 or the hot water valve 6-2 is opened and closed by an amount corresponding to the difference between the opening degrees. By doing so, cold water is supplied to the cold water coil 1-2 or hot water is supplied to the hot water coil 1-3, and the mixed air is cooled or heated.
[0027]
The display unit 2-9 displays a current index or the like on a BAS screen, for example.
Also, for example, by providing a communication IF (interface) (not shown) (not shown) to enable communication with a BAS-dedicated terminal device, for example, a PC (personal computer), the index is displayed together with the environmental condition of the building. You may.
[0028]
The above-described air-conditioning control device 2 includes a memory device, a central processing unit, and an IF device, and further includes an input / output device such as a keyboard and a printer, a display device such as a display, a CD-ROM drive, and the like. And an auxiliary storage device.
The central processing unit implements the functions of the above-described units by controlling each unit of the air-conditioning control device 2 in accordance with the air-conditioning control program stored in the memory device. The interface (IF) device is connected to a terminal device or the like via a network.
[0029]
The air conditioning control program is provided by a software package, for example, an information storage medium such as a CD-ROM, a ROM, a RAM, a flexible disk, and a memory card. The storage medium storing the air conditioning control program is set in the drive device, and the program is installed from the storage medium to the auxiliary storage device via the drive device.
The auxiliary storage device stores the installed air conditioning control program and also stores necessary files, data, and the like.
The memory device reads out and stores the air conditioning control program from the auxiliary storage device when the air conditioning control device 2 is started.
Further, the air conditioning control program may be provided by electric communication, for example, by a server.
[0030]
Next, the operation of the air conditioning control device 2 will be described.
First, for example, the operation mode is set to one of the energy saving mode / normal mode / comfortable mode by BAS.
Next, the temperature input unit 2-1 and the humidity input unit 2-2 refer to the temperature sensor 3 and the humidity sensor 4 at a predetermined cycle, for example, a cycle of 30 minutes, and obtain the temperature information and the humidity information of the return air duct 14. collect.
The temperature information of the return air duct 14 collected by the temperature input unit 2-1 is input to the index calculation unit 2-3 and the control unit 2-6, and the temperature information of the return air duct 14 collected by the humidity input unit 2-2. The humidity information is input to the index calculator 2-3 and the set temperature determiner 2-4.
[0031]
The index calculation unit 2-3 refers to the index conversion table, and obtains an index from the input temperature information and humidity information of the return air duct 14.
The humidity information of the return air duct 14 input to the set temperature determining unit 2-4 is based on the energy saving mode set temperature determining unit 2-41 and the normal mode set temperature determining unit 2-42 of the set temperature determining unit 2-4. , And the comfort mode setting temperature determination unit 2-43.
[0032]
The energy saving mode setting temperature determination unit 2-41 obtains the energy saving required temperature from the input humidity information of the return air duct 14 with reference to an index conversion table as shown in FIG. The obtained energy saving request temperature is input to the selection setting unit 2-5.
The normal mode set temperature determination unit 2-42 obtains the normal required temperature from the input humidity information of the return air duct 14 with reference to an index conversion table as shown in FIG. The temperature is input to the selection setting section 2-5.
The comfort mode setting temperature determination unit 2-43 refers to an index conversion table as shown in FIG. 4 to determine the required comfort temperature from the input humidity information of the return air duct 14, and determines the required comfort request. The temperature is input to the selection setting section 2-5.
[0033]
In the selection setting unit 2-5, one of the energy saving required temperature, the normal required temperature, and the comfort required temperature is selected based on the operation mode set by the BAS. The selected required temperature is input to the control unit 2-6 as a set temperature.
The control unit 2-6 controls the cooling valve 6-1 or the hot water valve 6 based on the temperature information of the return air duct 14 input by the temperature input unit 2-1 and the set temperature input by the selection setting unit 2-5. An opening of −2 is calculated. The calculated opening is issued to the air conditioner 1 as an operation control command.
In the air conditioner 1, the opening degree of the cooling valve 6-1 or the hot water valve 6-2 is controlled by an operation control command from the control unit 2-6 so that the temperature in the return air duct 14 becomes the set temperature. Is controlled. By this control, the interior 5 is controlled to be comfortable.
[0034]
In the operation of the air conditioning control device 2 described above, the case where the index is obtained from the temperature information and the humidity information of the return air duct 14 by the index conversion table has been described. However, the index may be obtained by the processing flow shown in FIG. Good.
In the operation of the air conditioning control device 2 described above, the case where the operation mode is set by the BAS has been described. However, the operation mode is set to manual by the manual / automatic switching unit (not shown), and further, the set value selection unit (not shown) May be used to select the operation mode.
[0035]
FIG. 7 shows a result of performing air conditioning control using the air conditioning control device 2 described in the present embodiment. In FIG. 7, the control of the air conditioner 1 is performed in the energy saving mode, so that the index is controlled to be from 74 to 75.
According to FIG. 7, it can be seen that the set temperature (automatic temperature set value) is changed at regular intervals based on the index. For this reason, the change in the return air temperature is smaller than in the conventional case where the return air temperature is controlled to be the set temperature, so that the change in the sensible temperature can be reduced and a more comfortable environment can be realized. , Further energy saving.
7 and 8, the return air temperature (temperature information of the return air duct 14) is 26.67 ° C., which is about 0.5 ° C. higher than the conventional 26.1 ° C. The opening degree of the hot / cold water valve is 15.21%, which is about one third of the conventional 49.1%. For this reason, the amount of cold water and hot water can be reduced, and energy can be saved.
[0036]
In the present embodiment, the case where the temperature sensor 3 and the humidity sensor 4 are installed in the return air duct 14 has been described. However, the temperature sensor 3 and the humidity sensor 4 may be provided at a place where a comfortable environment is desired, such as the indoor 5.
Further, in the present embodiment, the case where the index is controlled to be within a predetermined range by changing only the set temperature has been described, but if necessary, the index may be changed to a predetermined range by changing the humidity. The control may be performed so as to be within the range.
Further, in the present embodiment, a case has been described in which one of the energy saving mode, the normal mode, and the comfortable mode is selected and the index is controlled to be within a predetermined range. May be provided to perform the control.
[0037]
【The invention's effect】
According to the present invention, the return air temperature is calculated based on the temperature and humidity of the environment to be air-conditioned and controlled by controlling the air conditioner by changing the set temperature based on an index indicating the comfort of the environment. Can reduce the change in the perceived temperature, thereby realizing a more comfortable environment and energy saving.
[Brief description of the drawings]
FIG. 1 is a configuration diagram for explaining an outline of an air conditioning system according to an embodiment.
FIG. 2 is a functional block diagram for explaining functions of the air-conditioning control device according to the present embodiment.
FIG. 3 is a flowchart for explaining calculation of an index.
FIG. 4 is an index conversion table for obtaining an index from temperature and humidity.
FIG. 5 is a diagram for explaining a discomfort index.
FIG. 6 is a diagram for explaining temperature and humidity in an index range set in each operation mode.
FIG. 7 is a diagram for explaining the effect of air conditioning control using the air conditioning system according to the present embodiment.
FIG. 8 is a diagram for explaining air conditioning control using a conventional air conditioning system.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 air conditioner 1-1 air filter 1-2 cold water coil 1-3 hot water coil 1-4 humidifier 1-5 FAN (blower) 2 air conditioning controller 2- 4: Set temperature determination unit, 3: Temperature sensor, 4: Humidity sensor, 5: Indoor, 6-1: Cold water valve, 6-2: Hot water valve, 7: Humidifier control valve, 8-1, 8-2, 8-3, 8-4, 8-5, 8-6, 8-7, 8-8 ... damper, 9 ... total heat exchanger, 10-1, 10-2, 10-3 ... FAN (blower), 11 ... outside air A, 12 ... Exhaust EX. A, 13: Supply air (SA) duct, 14: Return air (RA) duct, 15: Exhaust (EX.A) duct.

Claims (6)

The temperature is calculated based on the temperature and humidity of the air-conditioning control target environment.If one of the temperature and the humidity of the air-conditioning control target environment is fixed so that an index indicating the comfort of the environment is within a predetermined range, Or operation setting means for determining the other of the humidity,
An air conditioning control device, comprising: a control unit that controls the operation of the air conditioner based on the temperature or the humidity determined by the operation setting unit. The air conditioning control device according to claim 1,
The air conditioning control device according to claim 1, wherein the predetermined range is selected from a plurality of index ranges prepared in advance. The air conditioning control device according to claim 1 or 2,
The air-conditioning control device, wherein the index is a discomfort index. A temperature / humidity detecting step of detecting the temperature and humidity of the environment to be air-conditioned;
One of the temperature or the humidity detected by the temperature / humidity detecting step is kept constant so that an index indicating the comfort of the environment is calculated based on the temperature and the humidity of the environment to be air-conditioned and is in a predetermined range. If so, a temperature and humidity determination step of determining the other of the temperature or the humidity,
An operation control step of controlling the operation of the air conditioner based on the temperature or the humidity determined in the temperature and humidity determination step. The operation control method for an air conditioner according to claim 4,
The control method for an air conditioner, wherein the predetermined range is selected from a plurality of index ranges prepared in advance. The control method for an air conditioner according to claim 4 or 5,
The said index is a discomfort index, The control method of the air conditioner characterized by the above-mentioned.

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