JP2022157918A - air conditioning system - Google Patents

Abstract

To enable "change of FDU operating value setting" by individual attendees, and optimize a PMV environment of the entire virtual section.SOLUTION: An air conditioning system comprises an FDU system that causes a non-contact temperature sensor to measure a surface temperature of an FDU section that virtually divides an air-conditioning target, estimates a radiant temperature of the FDU section, and calculates an FDU operating output value so as to become a target PMV arbitrarily set in advance from the temperature and humidity, wind speed, radiation temperature, clo value, and met in the FDU section. The FDU system controls FDU of each FDU section to produce a comfortable air-conditioning state.SELECTED DRAWING: Figure 1A

Description

The present invention relates to air conditioning control of a large office (room such as a work room) located in a building such as an office building. Then, the indoor space (virtual partition ) in addition to the temperature of each area, it is possible to efficiently measure the surface temperature of the area, thereby obtaining an appropriate predicted average thermal sensation report for each virtual area.

A variable air volume single duct system is generally used for air conditioning in indoor working environments such as office buildings, which are medium-sized and large-sized living rooms.
In the office, which is a large space, a variable air volume device (VAV) is installed for each virtual section that further divides the perimeter area near the outer wall and windows, and the interior area inside. In principle, air is supplied at a constant temperature through an air supply duct except when the load is low, and a temperature sensor is installed on the ceiling surface of each virtual section, and the VAV is used as an operating device to determine the temperature setting value in the VAV controller, etc. The output signal calculated based on the difference between the temperature and the temperature measurement value is used to control the opening and closing of the air volume variable part of the VAV, thereby controlling the supply of the air supply volume corresponding to the indoor load.

In this way, it is common to measure and control the representative temperature of the virtual space, but there are cases where this control is insufficient. The sensible temperature of indoor residents (workers, etc.) is affected by factors (parameters) such as indoor temperature, radiant temperature (radiant heat from indoor surfaces), and wind speed. Even if the setting is correct, the occupant's thermal sensation may tend to be uncomfortable.

If the human body is thermally neutral (thermal equilibrium), this thermal sensation will feel a comfortable state. That is, in addition to the four environmental factors of temperature [°C], humidity [%], wind speed [m/s], and thermal radiation [°C], the metabolic equivalent [met] and the amount of clothing [CLO value] are two elements on the human body side. : Also expressed as clo value], the state in which the predicted mean vote (PMV) calculated by the following formula is 0 is called the state in which thermal equilibrium is neutral and the most comfortable.
PMV=(0.303e-0.036M ⁺ 0.028)L
However, L: Heat load of human body [W/m ² ], M: Metabolic rate [W/m ² ]

PMV (predicted average thermal sensation report) is, as described above, the four environmental factors (room temperature, relative humidity, average wind speed, average radiation temperature) that affect the thermal comfort of the human body, and the two human factors (clothing amount , amount of work) (proposed by Professor Fanger of the Technical University of Denmark).

FIG. 9 shows the numerical values calculated by the above equations for these elements on a 7-point evaluation scale. FIG. 10 is a graph visually explaining PMV, with PMV on the horizontal axis and PPD: Predicted Percentage of Dissatisfied (Predicted Percentage of Dissatisfied) on the vertical axis. The predictive index, percentage of how many people feel uncomfortable, is taken and shown.

In FIG. 9, "comfortable" and "unpleasant" are evaluated in seven stages of +3 and -3 with 0 being neutral. As shown in FIG. 10, it is recommended that the PMV be within ±0.5 and the discomfort rate (percentage of how many people feel uncomfortable, PPD) be 10% or less.
Developing from the above general variable air volume single duct method, in order to make the virtual compartment a little smaller, the ceiling space is generally used as the return air chamber, but the ceiling space is used as the air supply chamber and the air outlet. There is an FDU system as disclosed in Japanese Patent Application Laid-Open No. 2019-132538 (Patent Document 1) as a system in which a variable air volume fan is built in and the air volume of each air outlet can be changed according to the preference of the resident.

FIG. 11 is a schematic explanatory diagram of a conventional indoor air-conditioning system as an FDU system, in which heat-generating equipment (not shown) such as OA equipment is accommodated in addition to occupants 5 . Reference numeral 6 indicates a terminal for attendees. Although FIG. 11 shows that one virtual compartment occupies the entire room for ease of explanation, there are actually a plurality of virtual compartments.
There is a ceiling chamber 1a in the ceiling space of the building 1, and a plurality of FDUs 7 are provided in the ceiling 4 between the room (virtual division) 1b. An underfloor chamber 1c is formed under the floor 3 of the room 1b, and suction ports 3a are formed at various points of the floor 3. As shown in FIG. The FDU7 is a lightweight fan-integrated diffuser unit with a small built-in fan that has a variable air volume. In FIG. 9, the line connected to the FDU 7 does not represent a duct, but is an image of a signal line. The ceiling chamber 1a serves as an air supply chamber, and the FDU is not connected to a duct, and the temperature-controlled air in the ceiling chamber 1a is drawn in by its own fan and blown out below the ceiling.

Supply air SA from an air conditioner (not shown) flows from an air intake 8 into the ceiling chamber 1a. The enrolled person 5 can change the air volume to his/her preference by operating the operation output value of the FDU 7 with his own terminal (enrolled person terminal) 6 .

That is, the FDU system 11 is operated with operating values set according to a preset operating schedule. An operation signal (operation command) individually instructed from the enrollee terminal 6 is transferred to the FDU system 11 via the communication line 16 .
The FDU system 11 transfers a command to change the operation output value of the FDU 7 corresponding to the operated enrollee terminal 6 to the corresponding FDU 7 via the communication slave device 15 . The FDU 7 adjusts the operation output value according to the change command signal. This command signal can be transferred using a LAN communication line or a multi-carrier communication (PLC) using a power line that supplies power for driving the subscriber terminals and the FDU.

In addition, the air (SA) supplied from each FDU 7 is air-conditioned after the heat load existing in the room 1b is air-conditioned with the heat or cold of the air itself, and then from the suction port 3a provided in the floor 3 to the underfloor chamber 1c. exhausted to join. The combined air is discharged from the air outlet 9 as return air RA and returned to the air conditioner (not shown). The air conditioner purifies this return air, adds fresh air from the external environment as necessary, and supplies the fresh air from the air intake 8 to the ceiling chamber 1a.

In this system, each occupant's adjusted FDU operating value is reset when the date changes. In addition, the heat load changes day by day. Therefore, it is necessary for the person present at the seat to issue an operation command at regular intervals every day so that the desired air-conditioning environment is achieved.
Since the FDU system is well known, only the necessary items will be explained here. For details of the FDU system, refer to, for example, Patent Document 1 and Patent Document 2.

In Patent Document 1, an air outlet (FDU) equipped with a fan is provided from the ceiling chamber to the air conditioning section, a variable air volume unit that adjusts the amount of conditioned air supplied to the ceiling chamber, and the measured value from the return air temperature sensor. Disclosed is an air-conditioning system capable of adjusting the amount of air-conditioned air supplied to the room and controlling the FDU by operating a personal computer or the like of the person present.

In addition, Patent Document 2 provides a supply air temperature sensor that measures the temperature of the air outlet for each virtual section set to be air-conditioned, and a control device that controls the supply air temperature based on the measured value of this sensor. air conditioning system.

JP 2019-132538 A Japanese Patent Application Laid-Open No. 2020-183820

The air-conditioning system disclosed in Patent Document 1 enables individual control of the FDU by operating a personal computer or the like (including smartphones, tablets, etc.) of the persons present. However, every time the date or time changes, it is necessary for the attendees to set the FDU to their preferred state. It does not always result in a comfortable air conditioning setting, and may cause unnecessary stress (complaints between the people present or to the air conditioning manager).

In the system disclosed in Patent Document 2, in addition to the possibility of stress generation in the technology described in Patent Document 1, the temperature of the air supply to the ceiling chamber is controlled by the temperature of the air outlet for each virtual section to be air-conditioned. Therefore, in order to set the air-conditioning conditions of the individual virtual compartments in a well-balanced manner, advanced adjustment calculations are required, the control procedure becomes extremely complicated, and the load on the management device increases.

The object of the present invention is to provide an air-conditioning system that solves the problems of the prior art by optimizing the air-conditioning environment of the entire virtual section while being able to respond to "changes in FDU operating value settings" by individual people present. to do.

In order to achieve the above object, the air conditioning system according to the present invention measures the surface temperature near the actual heat load, not the ceiling surface, of the room to be air conditioned (virtual compartment divided: hereinafter referred to as FDU compartment) with a non-contact temperature sensor. Measure, estimate the radiation temperature of the FDU section, estimate the PMV for each FDU from the temperature and humidity, wind speed, radiation temperature, clo value, met value in the FDU section, and compare this PMV estimated value and the target PMV The operation output value of the FDU is calculated by comparison. By controlling the FDU of each FDU section with this calculated value, it is possible to produce a comfortable air conditioning state.

Typical configuration examples of the present invention for achieving the above objects are listed below. Hereinafter, in order to clearly understand the present invention, reference numerals of the embodiments described later are attached to each configuration, but the present invention is not limited to the configurations specified by these reference numerals. In the present invention, measuring the surface temperature means that radiation from the surface of the floor, inner wall, various furniture placed in the room, fixtures, various electrical and electronic devices, and residents (humans, workers) in the FDU section means to measure the heat generated.

The air conditioning system according to the present invention includes:
A virtual section (FDU section, hereinafter also referred to as a room) 1b obtained by virtually dividing the space of the building 1 to be air-conditioned into one or more small sections is kept at an optimum PMV (predicted average thermal sensation report). An air conditioning system for
(1) an air intake 8 provided in the ceiling 4 of each FDU section to introduce clean air (supply air) from an air conditioner (AHU) into the ceiling chamber 1a;
an FDU 7 installed on the ceiling 4 of each FDU section to downwardly supply the conditioned air to the FDU section 1b;
A radiation thermometer (such as a thermopile sensor) 10 that is installed near the FDU 7 provided on the ceiling of each FDU section 1b and measures the surface temperature in the FDU section 1b;
an enrolled employee work desk 5A and an attendant terminal 6 installed in each of the FDU sections 1b so that they can be present;
an air discharge port 9 for discharging treated air (return air) from the vicinity of the floor 3 of the virtual section 1b;
an FDU system 11 that outputs an operating output value for controlling the air blowing amount to the FDU 7, sets an initial operating output value, and performs overall management of the system;
a thermopile system 12 that collects measured values of the radiation thermometer 10 installed in each FDU section 1b to generate the calculation parameters of the FDU system 11;
with
The thermopile system 12 estimates the PMV value for each FDU based on the return air temperature and humidity of the air conditioner, the temperature detected by the thermopile sensor, the met value, the clo value, and the wind speed. arbitrarily set target PMV values are compared and calculated to calculate an FDU operation output correction value;
The FDU system 11 updates the current FDU operating output value with the FDU operating output correction value output from the thermopile system 12, and outputs the updated output value of the FDU operating system to the FDU.

(2) The thermopile system 12 is provided with means for monitoring the collection cycle of the measured value data of the radiation thermometer 10 installed in the FDU section 1b, and the collection cycle of the measured value data is set at a constant cycle (preferably 30 ~ 600 seconds/time).

(3) The thermopile system 12 has a transmission cycle setting means for transmitting the FDU operating output correction value calculated from the collected measured values of the radiation thermometer to the FDU system 11, and the transmission cycle is fixed.

(4) The FDU system 11 includes means for setting the data transmission timing of the operation output value to each FDU 7, and sets the data transmission timing of the operation output value to the FDU 7 of each FDU section 1b at a constant cycle (preferably (every 20 minutes) and an arbitrary pattern at the time when an operation command signal is generated from the terminal 6 of the person present (2 minutes after the operation). .

The present invention is not limited to the configurations described above and the configurations described in the embodiments to be described later, and various modifications are possible without departing from the technical idea of the present invention.

According to the present invention, in addition to the temperature measurement value in the room to be air-conditioned, the surface temperature in all areas of the room is obtained without using a globe thermometer, and is calculated as a pseudo radiant temperature for each virtual section. In addition to the temperature detected by the thermopile sensor as the radiation temperature, the PMV value for each FDU is estimated based on each data of the return air temperature and humidity of the air conditioner, the met value, the clo value, and the wind speed, and this PMV estimated value and An air-conditioning system that can obtain comfortable air-conditioning control that is not biased according to the position in the living space by performing comparative calculations with arbitrarily set target PMV values and performing cascade control as corrected set temperature values for each virtual compartment. In addition, according to the present invention, the FDU is controlled so as to achieve the target PMV set in advance, and when there is an operation to change the temperature from the terminal of the person present in the FDU section, the target PMV is changed and the operating value of the FDU is changed in a short period of time (eg, 2 minutes). This target PMV is held in the system and is not reset even if the date changes.

1 is an explanatory diagram of a first configuration example of an FDU section to which one embodiment of an air conditioning system according to the present invention is applied and a control system; FIG. An explanatory diagram of a second configuration example of the FDU section to which one embodiment of the air conditioning system according to the present invention is applied and a control system Explanatory diagram of the flow of FDU control in FIG. 1 and data processing performed in the thermopile system Control relationship diagram of thermopile system and FDU in Fig. 1 Flow chart of PMV control in FIG. FIG. 2 is a plan view of a building for explaining an example of division of FDU sections according to the present invention; Explanatory drawing of the indoor thermo pattern displayed on the monitor of the thermopile system corresponding to Fig. 5 A plan view of a building for explaining another example of dividing the FDU section of the present invention. Explanatory drawing of the indoor thermo pattern displayed on the monitor of the central monitoring device corresponding to FIG. Explanatory diagram of PMV application range and PMV 7-point evaluation scale Graph diagram to visually explain PMV Explanatory drawing of the outline of the conventional indoor air-conditioning system.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of an air conditioning system according to the present invention will be described in detail with reference to examples.

FIG. 1A is an explanatory diagram of a first configuration example of an FDU section and a control system to which one embodiment of the air conditioning system according to the present invention is applied. FIG. 1B is an explanatory diagram of a second configuration example of the FDU section to which one embodiment of the air conditioning system according to the present invention is applied and a control system. 1A has an underfloor chamber 1c under the floor of the room to be air-conditioned (FDU section 1b) of the building 1, the conditioned air passing through the room is exhausted to the underfloor chamber 1c, and the air exhaust provided in the underfloor chamber 1c It is configured to be returned to an air conditioner (not shown) from an outlet 9 .

1B does not have an underfloor chamber, and the conditioned air that has passed through the room is returned to an air conditioner (not shown) from an air outlet 9 installed near the floor 3. FIG.

1A and 1B differ only in the presence or absence of an underfloor chamber, and the rest of the configuration including the air conditioning control system is the same, so the following description will be made with reference to FIG. 1A.

In FIG. 1A, the air conditioning system according to the present invention optimizes a virtual section (hereinafter also referred to as an indoor or FDU section) 1b in which the space of a building 1 to be air-conditioned is virtually divided into one or more small sections. It is an air-conditioning system for maintaining a reasonable PMV (predicted mean thermal sensation report).
The ceiling 4 of each FDU section has an air intake 8 that introduces clean air (supply air) from the air conditioner into the ceiling chamber 1a, and an air intake 8 installed in the ceiling 4 of each FDU section for the FDU section 1b. It has an FDU 7 for downward supply of conditioned air and a radiation thermometer 10 installed near the FDU 7 provided on the ceiling of each FDU section 1b to measure the surface temperature inside the FDU section 1b. Here, a thermopile sensor, which is a typical device as a radiation thermometer, is used, but other radiation thermometers having similar functions are not excluded. A radiation temperature control system using a thermopile sensor is here referred to as a "thermopile system" for the sake of convenience.
In order to measure the radiation temperature, it was necessary to install multiple globe thermometers at visually conspicuous heights in the living space, and it was necessary to take care not to bump into the globe thermometers. Accurate calculation of the surface temperature requires many glove thermometers to be placed in the living space, but in practice they were not generally placed all the time due to concerns about contact with people. A radiation thermometer installed on the ceiling measures the surface temperature in the lower part of the living room and regards it as the radiation temperature for control.

In each of the FDU sections 1b, there are an enrolled employee work desk 5A and an occupant terminal 6, which are installed so that they can be seated. An air outlet 9 is provided for discharging the air.

Then, for the outdoor space isolated from the air-conditioned section by the side wall 2, the operating output value for controlling the air blowing amount is calculated and output to the FDU 7, and the initial operating output value is set and the system and a thermopile system 12 that collects the measured values of the radiation thermometers 10 installed in each FDU section 1b and calculates the operation output correction value to be given to the FDU system 11. Furthermore, an FDU system is installed for setting the initial operating output value of the FDU system and for supervising the system. This FDU system is equipped with optional input means such as initial setting values required for air conditioning by the operation manager, and the physical arrangement of the FDU section 1b, and the thermopile system 12 is equipped with visual monitor means for visually observing thermopatterns. .

The thermopile system 12 collects the temperature data of the FDU section 1b, the return air temperature of the air conditioner, the return air humidity and the operation mode, and calculates the PMV estimated value calculated, and the target PMV data of each FDU from the FDU system 11. The FDU operation output correction value is calculated based on the deviation from .
The FDU system 11 collects the initial target PMV data set in the FDU system, the FDU operation output correction value data obtained from the surface temperature of each FDU section collected by the thermopile system 12, and the occupant terminal 6 The FDU operation output value to be given to each of the FDUs 7 in the FDU system 11 is calculated based on the data of the operation command generated by the operation of .

Measurement data from radiation thermometer 10 , preferably a thermopile sensor, is collected by communication line 16 to thermopile system 12 .

The thermopile system 12 includes means for monitoring the collection cycle of the measured value data of the radiation thermometer 10 installed in the FDU section 1b, and the collection cycle of the measured value data is set to a constant cycle (preferably 30 to 600 seconds / time ).

Further, the thermopile system 12 is provided with transmission cycle setting means for transmitting to the FDU system 11 the FDU operation output correction value calculated from the collected measurement values of the radiation thermometer, and the transmission cycle is fixed.

The FDU system 11 is provided with timing setting means for setting the data transmission timing of the operation output value to each FDU 7, and sets the data transmission timing of the operation output value to the FDU 7 of each FDU section 1b at a constant cycle. This period is preferably a fixed pattern every 20 minutes, and an arbitrary pattern when an operation command signal for the terminal 6 of the person present is generated (for example, two minutes after the operation). Value data is sent from the communication means 16 to the communication slave unit 15 . The communication slave unit 15 decodes the operation data of the FDU section 1b to which it belongs and gives it to its own FDU7.

The PMV estimated value calculated from the initial target PMV data set in the FDU system 11, the surface temperature of each FDU section collected by the thermopile system 12, the return air temperature and humidity of the air conditioner, and the operation mode , FDU operation output correction value data obtained based on the deviation from the target PMV data of each FDU from the FDU system 11, operation command data generated by operating the occupant terminal 6, and other data transfer Although a dedicated communication line 16 may be interposed, in this embodiment, power line multiple carrier (PLC) means using a power line for supplying power energy for system operation is used as the communication means.

FIG. 2 is an explanatory diagram of (a) the control flow of the FDU and (b) data processing performed in the thermopile system in FIG. The FDU system 11 stores "air conditioner operation mode (cooling/heating/dehumidification, etc.)", "air conditioner return air temperature", and "air conditioner return air humidity" set by the operation manager from the central monitoring device 13. , Each initial data or adjustment data of "thermopile detection temperature (floor, OA equipment, surface temperature of furniture etc.)", "met value, clo value, wind speed" set in the thermopile system 12 is input, and the thermopile from the FDU system 11 The PMV for each FDU is estimated at the thermopile system 12 including the data input to the system 12 .

Further, the FDU system 11 receives operation instruction data (condition change request data) from the terminals 6 of the attendees (personal computer, smart phone, tablet, etc.). When the operation instruction data is input from this person's terminal 6, the above initial data or adjustment data is changed.

The thermopile system 12 receives current temperature (current temperature) data from the thermopile sensor 10 in parallel with receiving each of the above data and the target PMV from the FDU system 11 . The thermopile system 12 compares the current PMV estimated value for each FDU with the target PMV of each FDU arbitrarily set in the FDU system, generates an FDU operation output correction value so as to achieve the target PMV, and stores the data to the FDU system 11. The FDU system 11 transfers the calculated FDU operation output value including the FDU operation output correction value to each FDU. This transfer cycle was set to about 20 minutes in consideration of the sensory tendency of the people present.

FIG. 3 is a control relationship diagram of the thermopile system and the FDU system in FIG. The thermopile system 12 comprises FDU operation output correction value calculation means 12a and PMV estimation means 12b. The PMV estimation means 12b estimates the PMV for each FDU section based on the return air temperature and humidity of the air conditioner (AHU), thermopile sensor sensor temperature, met, clo values, and wind speed.

The FDU operation output correction value calculation means 12a compares and calculates the PMV estimated value for each FDU section from the PMV estimation means 12b and the target PMV set by the FDU system to generate the FDU operation output correction value.
The FDU system 11 is provided with FDU operation output value updating means 11a, and updates the current operation output value with the operation output correction value output periodically (for example, every 20 minutes) from the thermopile system 12. , and gives the data of the updated operation output value to each FDU 7 . In addition, the data transfer means 11b provided in the FDU system 11 receives the "AHU operation mode (cooling/heating/etc.)", "AHU return air temperature", and "AHU return air humidity" set by the central monitoring device 13. Transfer to thermopile system 12 .

4A and 4B are diagrams explaining the processing procedure of the FDU control system in FIG. As shown in FIG. 4(a), the indoor absolute humidity calculated from the return air humidity and return air temperature of the air conditioner (AHU) and the temperature detected by the non-contact radiation sensor (thermopile sensor) of the FDU section Calculate the relative humidity (%) of

A target PMV set value arbitrarily set from the FDU system 11, clo value, met value, wind speed, estimated radiation temperature of the FDU section, and detection temperature of a non-contact radiation sensor (thermopile sensor) for each FDU section, and the above The relative humidity of the FDU section is input to a calculation program for specifically calculating the PMV formula (step 1, hereinafter referred to as S-1), and the current PMV is calculated (S-2).

The amount of change in the room temperature of the FDU section is calculated for changing the calculated current PMV to the target PMV (S-3). The operating output value of the FDU section is calculated so as to achieve this indoor temperature change amount, and the calculated operating output value is output to the FDU system 11 (S-4). In accordance with this operation output value, the FDU 7 controls its blowing air volume so that the FDU section will reach the target PMV (S-5). The amount of blown air is controlled, and the amount of air supplied to the room (the FDU section concerned) is changed.

The temperature of the FDU section changes due to this change in the amount of supplied air, and this temperature change is detected by the non-contact radiation sensor (thermopile sensor) (S-6. This detected temperature is the temperature detected by the non-contact radiation sensor. After that, this loop is repeated to appropriately control the PMV of the FDU partition.

When the target PMV is changed by the operation of the seated person, the PMV calculation is performed again, and the FDU operation output value is output two minutes after the operation to control the FDU.
In addition, since the current temperature of the FDU section is updated every 20 minutes and the indoor situation changes, the PMV calculation is performed again. Repeat this.

FIG. 5 is a plan view of a building for explaining an example of dividing the FDU section of the present invention. The building interior to be air-conditioned is virtually divided into equally spaced surface temperature measurement sections, and a microbolometer is installed in each section. It is the result of installing one by one and verifying the temperature distribution. In the figure, 2a is the wall surface of the building, 2b is the window, and the layout of office desks, bookshelves, etc. in the room is shown transparently. It is a thermography measured by a microbolometer installed in each surface temperature measurement section (corresponding to the FDU section described above). The measured data were displayed in a color pattern on the monitor of the thermopile system in FIG.

FIG. 6 is a thermograph displayed on the monitor of the thermopile system corresponding to FIG. 5, showing temperature differences in different colors. A cloud pattern (irregular curve) 30 indicates the vicinity of the boundary of different surface temperatures, and the inside and outside of this pattern are displayed in different colors. The color display is displayed so that the high and low surface temperatures can be visually identified by the difference in color hue/saturation.

Conventional air conditioning control based on indoor temperature feedback could not ensure comfort with PMV. In addition, it becomes possible to easily measure the surface temperature of a virtual section (FDU section 1b) in which a plurality of these are collected, and the PMV estimated value can be calculated for each virtual section.

That is, cascade control is performed to operate the supply air volume so as to achieve the target PMV based on the difference between the target PMV and the estimated PMV for each FDU section. That is, the current PMV estimated value is calculated, the difference between the target PMV set value arbitrarily set for each virtual partition and the current PMV estimated value is calculated, and the difference between the target PMV set value and the current PMV estimated value is calculated. A correction of the FDU operating output value is calculated to be zero.

As described in step 3, calculate the amount of room temperature in the FDU section to make the difference between the target PMV set value and the current PMV estimated value zero, and add or subtract to the original set temperature in the FDU section to obtain The corrected set temperature of the FDU section that continues to be corrected based on the deviation between the corrected set temperature of the FDU section that continues to be input to the air volume variable device for each FDU section and the measured temperature in the FDU section. Cascade control is performed to operate the air supply volume so that the corrected set temperature is achieved. As a result, it is possible to realize an indoor environment that maintains a comfortable PMV.

In addition, since the surface temperature in the room can be detected in real time, it is easy to grasp sudden increases and decreases in internal heat generation, and it is possible to control the temperature setting value to increase or decrease in advance according to the increase or decrease in heat load.

In addition, since there is a time delay before the heat (surface temperature) of objects (OA equipment, furniture, people, etc.) inside the room raises the temperature of the indoor air, the temperature sensor that measures the indoor temperature will At the time of capturing , the air temperature around the occupants is already high. It can be expected that the disturbance of the room temperature due to the time delay can be suppressed.

FIG. 7 is a plan view of a building illustrating another example of division of the FDU section of the present invention, and FIG. 8 is an explanatory diagram of an indoor thermo pattern displayed on the monitor of the thermopile system corresponding to FIG. FIG. 7 shows the result of dividing the room into FDU sections with different sizes and installing one or a plurality of microbolometers in each section to verify the temperature distribution.
In this embodiment, for example, an area where there is no frequent temperature change is wide, a perimeter zone such as a room edge has a drastic temperature change due to a change in solar radiation depending on the direction, or an area where a lot of people come and go has a drastic temperature change. A narrower FDU partition is set for the area considered to be.

In FIG. 7, reference numeral 2 denotes an interior peripheral member, 2a denotes a wall surface, and 2b denotes a window. This virtually divided FDU section was divided into 7 sections (FDU1 to FDU7) with different areas, and the surface temperature was measured by thermography measured by one or more microbolometers for each section. This thermography is displayed on the monitor of the thermopile system.

FIG. 8 is an explanatory diagram of the indoor thermopattern shown in FIG. 7 displayed on the monitor of the thermopile system. Each FDU section measures the surface temperature of each FDU section by using a microbolometer with an optically enlarged viewing angle, or by arranging a plurality of microbolometers in one FDU section, and displays it on a monitor.

In this way, areas where there are no frequent temperature changes are wide, and areas where temperature changes are expected to be large, such as areas where many people come and go, are narrower. can provide.

As the thermography acquisition means used for the verification of each of the above examples, not only a microbolometer (microbolometer camera) but also an infrared camera using a CCD image sensor or a CMOS image sensor type photoelectric conversion element can be adopted. .

The size of the FDU section is flexibly set in consideration of the size of the target room, the amount of heat generated by the heating element, the number of indoor office furniture, fixtures, and the like. The number of installed thermographic acquisition means also takes into account the size of the FDU compartment.

Reference Signs List 1 Building 1a Ceiling chamber 1b Interior room 1c Underfloor chamber 2 Side wall 2a Wall surface 2b Window 3 Floor 3a Suction port 4・・・Ceiling 5・・・Attendees (humans, workers, etc.)
6 : Attendee terminal 7 : FDU (air outlet)
8 Air inlet 9 Air outlet 10 Temperature sensor (radiation thermometer: thermopile, etc.)
11 FDUs
11a FDU operation output value updating means 11b Data transfer means 12 Thermopile system 12a FDU operation output calculation means 12b PMV estimation means 13 Central monitoring device 14 Network 15... Communication cordless handset 16... Communication line

Claims (4)

An air-conditioning system for maintaining optimal PMV in virtual compartments (hereinafter also referred to as FDU compartments) obtained by virtually dividing the space of a building to be air-conditioned into one or more small compartments,
an air intake provided in the ceiling of each FDU compartment for introducing clean air from an air conditioner into the ceiling chamber;
an FDU installed on the ceiling of each FDU compartment to downwardly supply the conditioned air to the FDU compartment;
a radiation thermometer installed in the vicinity of the FDU provided on the ceiling of each FDU compartment to measure the surface temperature in the FDU compartment;
an enrolled employee work desk and an attendant terminal installed in each of the FDU sections so that they can be present;
an air outlet for discharging treated air from near the floor of the virtual compartment;
an FDU system that outputs an operating output value for controlling the amount of air blowing to the FDU, sets an initial operating output value, and performs overall management of the system;
a thermopile system that collects the measured values of the radiation thermometer installed in each FDU section and calculates an operation output correction value to be given to the FDU system;
with
The thermopile system estimates the PMV value for each FDU based on the return air temperature and humidity of the air conditioner, the temperature detected by the thermopile sensor, the met value, the clo value, and the wind speed. Calculate the FDU operation system correction value by comparing the target PMV value set in
The FDU system updates the set value set by the central monitoring device with the FDU operation system correction value output from the thermopile system, and outputs the updated output value of the FDU operation system to the FDU. . 2. The thermopile system according to claim 1, wherein said thermopile system comprises means for monitoring a collection cycle of measurement value data of said radiation thermometer installed in said FDU section, and the collection cycle of said measurement value data is set to a constant cycle. air conditioning system. 2. The air conditioning system according to claim 1, wherein said thermopile system comprises transmission cycle setting means for transmitting the collected measured value data of said radiation thermometer to said FDU system, and said transmission cycle is fixed. The FDU system includes a timing setting means for setting the data transmission timing of the operation output value to each FDU, and a fixed pattern in which the data transmission timing of the operation output value to the FDU of each FDU section is set to a constant cycle, and 2. The air-conditioning system according to claim 1, wherein the operation output value data is sent to said FDU at two timings, one being when an operation command signal of a terminal is generated and an arbitrary pattern.

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