JPH03213925A - Individually controllable centralized air-conditioning system - Google Patents

Abstract

PURPOSE:To enable subdivision of an air-conditioning control zone and reflection of an individual difference in respect to the feeling of warmth onto an air-conditioning system by a method wherein a control device determines the quantity of ventilation of a variable air quantity unit in accordance with a temperature detected by a temperature detecting element, while it determines the quantity of air to be sent from an outlet by comparing a set temperature with the detected temperature. CONSTITUTION:A control device 11 takes in information on temperature in an office from a temperature detecting element 17, while taking in a set temperature of each of temperature setting devices 181 to 183 through a communication line 21, and controls a VAV unit 12 and outlets 161 to 163. According to an instruction from the control device 11, the unit 12 adjusts the quantity of warm air from an air heater 13 and sends the air to system ducts 14 and 15. ON the occasion, the warm air is sent to the duct 15 from the unit 12 through a ventilation tube 22 and then to the duct 14 from the duct 15 through a ventilation tube 23. Actuators provided at the outlets 161 to 163 are given instructions on the amount of opening of shutters from the control device 11, and based thereon, the quantity of the air to be sent from each outlet is adjusted.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a central individual air conditioning system suitable for intelligent offices, etc. [Prior Art] In recent years, offices have become more OA and intelligent. In response to this, there is a need for building air conditioning to create a more comfortable environment in order to deal with the internal heat generation of OA equipment and improve intellectual production.

To this end, unitary systems such as multi-unit systems for buildings have been proposed, but they have problems in terms of controllability and maintainability, and are still hardly used in buildings with large areas of 3000 m'' or more.

As an air conditioning system that is compatible with the intelligentization of offices, the control zones of the central air conditioning system that can provide high quality air conditioning can be divided into smaller zones than before to make it compatible with office automation, as well as flexibility for changes in office layout. We need to improve. At the same time, it is desirable to incorporate a control method that can reflect individual preferences regarding thermal sensation, that is, individual differences, to achieve an air-conditioned environment that more closely matches the individual's sense of comfort.

In order to achieve the above target performance, variable air volume (Variable Alr Volume) using small air conditioning zones is used.
e, hereafter referred to as VAV) method is considered. An example of its configuration is shown in FIG.

In FIG. 2, the air heated by the air heater 1 is V
The air volume is adjusted by the AV unit 2, and the air is blown into the office from a hot air outlet 3 installed at a predetermined location on the ceiling. Further, a temperature detection element 5 is arranged near the desk 4, and the output signal of the temperature detection element 5 is inputted to a VAV unit that blows air to the corresponding hot air outlet 3 via a communication line 6. As a result, the air volume is adjusted in the VAV unit 2. Note that 7 in FIG. 2 indicates a chair.

According to the above configuration, the air conditioning control zones are subdivided and the volume of hot air for each air conditioning control zone can be adjusted based on the temperature detected by the temperature detection element 5. In addition, by providing a large number of openings in the ceiling where hot air outlets 3 can be installed, it is possible to easily adjust the installation location of hot air outlets 3 even when changing the layout of OA equipment. can be moved.

[Problem to be solved by the invention] However, the VAV due to the small air conditioning zone shown in FIG.
In the control method, ■ In order to enable air to flow no matter where the outlet is installed, an air pipe must be installed for each opening, so the initial cost is high; ■ Minimum outside air intake If the air volume is secured for each zone, it is more difficult to reduce the air volume than in the one-span zone VAV system. It is necessary for each VAV unit to have a large capacity, ■ If the air conditioning control zone is small, it is difficult to install the temperature detection element in an appropriate position, ■ It is difficult to set the temperature using the temperature detection element If this is done, there are problems such as the possibility of imbalance in air volume, such as locally excessive air volume.

The present invention solves the above-mentioned problems, and can subdivide air conditioning control zones, reflect individual differences in thermal sensation in air conditioning methods, has flexibility in changing the layout of OA equipment, and has low The purpose is to provide a central individual air conditioning system that is low cost.

[Means for Solving the Problem] In order to achieve the above object, the central individual air conditioning system of the present invention includes a variable ffl amount unit;
This is a central individual air conditioning system that includes a system duct that has an air outlet inside, a temperature setting device that sets the temperature of the minimum control zone, a temperature detection element that detects the temperature of the main control zone, and a control device. hand,
The control device determines the amount of air blown from the variable air volume unit to the system duct according to the temperature detected by the temperature detection element, and also controls the temperature set by the temperature setting device and the temperature detected by the temperature detection element. It is characterized in that the amount of air blown from the outlet is determined by comparing the temperature with the temperature.

[Function] According to the present invention, the amount of air blown from the VAV unit to the system duct, that is, the maximum amount of air blown to the main control zone, is determined by the temperature detected by the temperature detection element, that is, the average temperature of the main control zone or the temperature at a specific position. The amount of air blown to the minimum control zone, that is, the personal zone, is determined by the temperature, and the amount of air blown to the minimum control zone, that is, the personal zone, is determined by comparing the temperature detected by the temperature detection element and the temperature set by the temperature setting device arranged in each minimum control zone. This not only makes it possible to reduce the minimum control zone and easily accommodate individual differences in thermal sensation, but also because the maximum air flow rate is determined by the temperature of the main control zone, the air flow rate in the minimum control zone can be reduced. It is possible to avoid an increase in imbalance.

〔Example] Examples will be described below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the central individual air conditioning system according to the present invention, in which 11 is a control device, 12 is a VAV unit, 13 is an air heater,
14.15 is the system duct, 161, 162, 163
is an air outlet, 17 is a temperature detection element, 18+1182.
18x is a temperature setting device, 19 is a desk, 20 is a chair, 21 is a communication line, and 22.23 is a blower pipe.

In FIG. 1, a control device 11 is composed of a microprocessor, a memory, etc., and receives temperature information in the office from a temperature detection element 17, and also receives temperature information from a temperature setting device 18IN 182.
．． 183 via the communication line 21, the vAV unit 12 and the air outlet 16+1
16i and 163. The VAV unit 12 adjusts the volume of hot air supplied from the air heater 13 according to instructions from the control device 11, and controls the system duct 14.
The hot air is first blown from the VAV unit 12 to the system duct 15 via the blow pipe 22, and then from the system duct 15 to the system duct 14 via the blow pipe 23. At a predetermined position in the system ceiling) 14.15, an air outlet 16+ equipped with a shutter and an actuator for opening and closing the shutter;
182, leg is installed. The actuator is instructed by the control device 11 to open and close the shutter, thereby adjusting the amount of air blown from each outlet.

In addition, multiple openings are provided on the ceiling inside the system duct 14.15, including air outlets 1B+, 1F3t
, 163 can be installed at desired positions of these openings, thereby easily adapting to layout changes. Temperature setting device 181.182.183
The desks 4 are arranged in individual zones, that is, minimum control zones, and are composed of, for example, an extension telephone or a personal computer, and desired temperature settings are made by the person using each desk 4. The temperature setting device t181.182
．． 18! The temperature set in is taken into the control device 11 via the communication line 21 and stored.

In the configuration shown in FIG. 1, the room temperature of the air conditioning control zone shared by the VAV unit 12, that is, the main zone, is determined by the control device 11 based on the temperature detected by the temperature detection element 17. That is, the control device 11 detects the temperature detection element 17
vAV unit 1 based on the temperature information taken in from
2 to the system duct 14.15.
Give instructions to the vAV unit 12. As a result, the average room temperature of the main zone is controlled based on the average temperature of all return air in the minimum control zone or the temperature of the representative point.

Further, the control device 11 compares the temperature detected by the temperature detection element 17 with the set temperature individually set by the temperature setting devices 181, 182, 18, and determines the temperature of each air outlet 16+, 162, 163 The air flow rate is controlled individually by giving instructions to each actuator. This controls the amount of hot air blown to the minimum control zone.

Note that the AHU air volume control based on the minimum outside air intake amount, AHU blowout temperature control, and minimum air volume signal is performed in the same manner as normal VAV control. In addition, the temperature detection element 17
A device such as a fan or a duct (not shown) for exhausting indoor air to the outside is arranged at the exhaust port where the air is disposed, and the exhaust amount depends on the temperature detected by the temperature detection element 17. It is made to be determined. In other words, the control device 1
1 determines the exhaust amount based on the temperature detected by the temperature detection element 17. The amount of exhaust gas can be adjusted by controlling the drive amount of a fan for exhaust air, or by controlling the amount of opening and closing of a valve disposed in the exhaust duct.

Although one embodiment of the present invention has been described above, it is clear to those skilled in the art that the present invention is not limited to the above embodiment, and that various modifications can be made. For example, it is possible to integrate the system duct with the system ceiling, thereby reducing duct construction costs.

[Effects of the Invention] As is clear from the above description, according to the present invention, the room temperature of the main zone shared by one VAV unit 12 is determined based on the average temperature detected by the temperature detection element 17; Since the temperature of the minimum control zone is determined by comparing the average temperature detected by the temperature detection element 17 and the temperature set by the temperature setting devices 18+118a and 18s, it is possible to reflect individual differences in thermal sensation. Not, but
It is possible to avoid a situation where the air volume becomes unbalanced.

Furthermore, since the main zone can be divided into smaller sections than in a single-span VAV system, more fine-grained air conditioning control can be performed. In addition, while maintaining the high-quality air conditioning that is a feature of the central type in each main zone, the minimum control zone can be made as small as or even smaller than that of the individual distributed type, making it possible to achieve good air conditioning. I can do it.

Furthermore, in the minimum control zone, the temperature setting device can be used to set an increase or decrease relative to the average temperature of the main zone, that is, individual differences in thermal sensation, so air conditioning can be performed that is more responsive to each person's individuality.

Furthermore, in conventional air conditioning systems, the VAV unit and control device had to be placed in each control zone, as shown in FIG.
Since only one AV unit and control device is required, costs can be reduced.

In addition, the combination of the ceiling-integrated system duct and air outlets equipped with shutters and actuators not only makes it easy to rearrange the air outlets in response to layout changes, but also reduces internal heat generation in OA equipment. Even if the air outlet is large, good air conditioning can be achieved by changing the arrangement of the air outlet.

Furthermore, since the minimum amount of outside air introduced is determined in the main zone, the air volume can be reduced compared to the case where VAV control is performed individually, so that energy saving can be achieved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of a central individual air conditioning system according to the present invention, and FIG. 2 is a diagram showing an example of the configuration of a conventional air conditioning system. 11... Control device, 12... VAV unit, 13
...Air heater, 14.16...System duct,
181.162.16i...Air outlet, 17...
Temperature detection element, 1 g+118*, 18g...Temperature setting device, 19...Desk, 20...Chair, 21...
・Communication line, 22, 23...Blow pipe. Applicant Shimizu Corporation Sub-Agent Patent Attorney Ryukichi Abe (6 others) i1 Figure $2

Claims (1)

[Claims] (1) Equipped with a variable air volume unit, a system duct having an air outlet therein, a temperature setting device that sets the temperature of the minimum control zone, a temperature detection element that detects the temperature of the main control zone, and a control device. In the central individual air conditioning system, the control device determines the amount of air blown from the variable air volume unit to the system duct according to the temperature detected by the temperature detection element, and the amount of air blown from the variable air volume unit to the system duct is set by the temperature setting device. A central individual air conditioning system characterized in that the amount of air blown from the drawer opening is determined by comparing the temperature with the temperature detected by the temperature detection element.