JPH06193947A - Under floor air conditioning system - Google Patents

Abstract

PURPOSE:To provide an under floor air conditioning system in which a blowing amount of conditioned air blown out of a blowing port near an OA equipment in correspondence with a shifting of thermal load in both a high thermal load region and a low thermal load region within an office room and variation of the thermal load got from a heat generating equipment such as an OA equipment, an energy saving can be assured and comfortable feeling can be improved. CONSTITUTION:An office room 32 is divided into a high thermal load region 40 where a heat generating equipment such as an OA equipment 38 and the like are installed and a low thermal load region 42 other than the high thermal load region. The high thermal load region 40 is provided with an optical sensor 106 for sensing information about presence of a person or a detecting sensor 106 such as a sensor microphone or a vibration pick-up and the like for use in sensing an operation or a stopping of the OA equipment. A blowing port 46 of the high thermal load region 40 is provided with a fan device 50. The fan device 50 is controlled by a fan device controller 108 in response to information got from the detecting sensor 106 so as to adjust a blowing amount of conditioned air 126 blown out of the air blowing port 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-conditioning method and apparatus thereof, and more particularly to an underfloor air-conditioning system in the case where heat load from an exothermic device such as OA equipment causes uneven heat load in an office.

[0002]

2. Description of the Related Art When air-conditioning systems are divided according to air-blowing methods, there are a ceiling-air-blowing air-conditioning system that blows air-conditioned air from the ceiling of an office and a floor-blowing air-conditioning system that blows air-conditioned air from the floor, a so-called underfloor air-conditioning system. In an intelligent building where many automation devices (hereinafter referred to as OA devices) such as personal computers and workstations are installed, a double floor with power cables for OA devices and communication cables such as a local area network (LAN) is installed. An underfloor air conditioning system used as a chamber for supplying conditioned air from an air conditioner has been increasingly adopted.

Further, as a recent trend, the heat load from heat-generating equipment such as OA equipment is increasing with the increase in the installation density of OA equipment and the like, and there is a tendency for cooling and air conditioning throughout the year. Further, as further improvement in comfort is required, the blasting power is increasing due to the increase in the circulation amount of the conditioned air, and the air conditioning energy is increasing dramatically. As shown in the conventional underfloor air conditioning system equipped with a fan unit in FIG. 4, the conditioned air 3 supplied from the air conditioner 1 to the underfloor chamber 2 formed of a double floor is installed in a plurality of underfloor chambers 2. Fan units 4, 4 ... (The conditioned air 3 supplied from the air conditioner 1 to the underfloor chamber 2 is blown by the fans 4 attached to the outlets 5, 5 ...
Is blown out into the office room 6 from the fan unit 4. The conditioned air 3 blown into the office room 6 absorbs heat from the heating elements such as the office automation equipment 7, 7, 7 and warms up, and rises in the office room 6 to form a plurality of intake ports 8 formed on the ceiling. , 8 ... is sucked into the ceiling chamber 9. A part of the return air 10 sucked into the ceiling chamber 9 is exhausted to the outside of the system via the return air duct 11, and is mixed with the fresh outside air 12 introduced and returns to the air conditioner 1.
In the air conditioner 1, the temperature and humidity are adjusted by the filter 1A, the cooling coil 1B, the heating coil 1C, and the humidifier 1D, and the blower 1
E is again supplied to the underfloor chamber 2 via the air supply duct 13. In addition, the conditioned air 3 supplied to the office 6
The temperature and humidity are controlled by the temperature and humidity sensor 14 provided on one wall of the office room 6 to detect the temperature and humidity inside the office room 6, and the detection result is input to the air conditioner controller 15. Then, the cooling coil 1B, the heating coil 1C, and the humidifier are controlled by the air conditioner controller 15 so that the temperature and humidity in the office room 6 become equal to the temperature and humidity preset in the air conditioner controller 15.

The above-mentioned underfloor air conditioning system can perform air conditioning for the living space 16 in which the person in the office room 6 moves or works, and at the same time, the air warmed by the OA equipment 7 etc. It can be said that the air conditioning system is superior in energy saving and comfort compared to the ceiling blowing air conditioning system because it can be raised in the ceiling direction and removed from the living space 16.

[0005]

However, the conventional underfloor air conditioning system has a temperature / humidity sensor 14
The temperature and humidity in the office room 6 are detected by the air conditioner, and the air conditioner controller 15 controls the air conditioner 1 based on the detection result to control the conditioned air 3 to a preset temperature and humidity. Individual fan unit 4 as shown in
The amount of conditioned air 3 blown out from the air conditioner 3 is not controlled, and a constant amount of conditioned air 3 is always blown out from all the outlets 5 formed in the office room 6.

Therefore, when a large number of heat generating devices such as the OA device 7 are installed in the office as in recent years, the following drawbacks occur. (1) Even though a high heat load region 17 and a low heat load region 18 other than the heat generating device 7 are formed in the office room 6, a constant conditioned air 3 is blown out from all the outlets 5. Therefore, if the blowing amount of the conditioned air 3 is set based on the high heat load region 17, the low heat load region 18 is too cold, and if the blowing amount of the conditioned air 3 is set based on the low heat load region 18, the high heat load region 17 is set. There is a drawback in terms of comfort because it is too hot. (2) Further, the heat generating device such as the OA device 7 is not operated all day long, and is usually operated as needed. Therefore, although the heat load from the heat-generating device 7 is constantly changing due to the operation / stop of the heat-generating device 7, a constant conditioned air 3 is blown out from each outlet 5 in the high heat load region 17. Therefore, there is a drawback that the waste of the conditioned air 3 becomes large, the blasting power of the conditioned air 3 increases, and the air conditioning energy increases.

The present invention has been made in view of such circumstances, and the unevenness of the heat load in the high heat load region and the low heat load region in the office, and the fluctuation of the heat load from the heat generating device such as OA equipment. It is an object of the present invention to provide an underfloor air conditioning system that saves energy and improves comfort because the amount of conditioned air that is blown out from the air outlet near the OA equipment is controlled according to the above.

[0008]

In order to achieve the above object, the present invention provides an underfloor air conditioner in which conditioned air from an air conditioner is blown into the air conditioner through a plurality of outlets formed on the floor of the air conditioner. In the system, a person detecting means for detecting the presence information of a person in the high heat load area by dividing the air-conditioning room into a high heat load area in which a heat generating device such as an OA device is installed and a low heat load area other than the high heat load area. A blowout amount adjusting means is provided at each blowout port in the high heat load region of the plurality of blowout ports, and the operation and the air flow rate of the blowout amount adjusting means are controlled based on the detection result of the person detecting means. A control means is provided so that the conditioned air is blown out from the plurality of outlets into a constant blowout in a low heat load region and an individual blowout in a high heat load region.

[0009]

According to the present invention, a high heat load area around the heat generating equipment and a low heat load area other than the heat generating equipment are formed in the air conditioning room by increasing the number of heat generating equipment such as OA equipment installed in the air conditioning room, and the OA equipment. The heat generating equipment such as is not operated all day long, it is usually operated as needed,
For this reason, it was made paying attention to the fact that the heat load from the heat generating device also fluctuates.

According to the present invention, a person who detects the presence information of a person in the high heat load region by dividing the air-conditioning room into a high heat load region in which a heat generating device such as an OA device is installed and a low heat load region other than the high heat load region. A detection means is provided. Further, blowout amount adjusting means is provided at each blowout port in the high heat load region, and the operation of the blowout amount adjusting means and the air flow amount are controlled by the control means based on the detection result of the human detecting means. This allows
While the conditioned air is constantly blown out from the outlet in the low heat load area at a constant air volume, the operation and air volume of the blowout amount control means is controlled from the outlet in the high heat load area based on the presence information of the person in the high heat load area. Thus, the conditioned air can be blown out individually for each outlet. That is, when no one is in the high heat load region, it is possible to stop the blowing of the conditioned air into the office room or reduce the amount of air blown out. Further, when a person is in the high heat load region, it is possible to start blowing the conditioned air into the office room or increase the air volume.

Further, instead of the human detecting means, an operation detecting means for detecting the start / stop of a heat generating device such as an OA device,
For example, a sensor microphone that detects the driving sound of the heat-generating device or a vibration detector that detects the driving vibration of the heat-generating device is provided, and the control means controls the blowout amount adjusting means based on the detection results of these operation detecting means. You may do it.
Thereby, the blowout amount adjusting means can be controlled in correspondence with the operation / stop of the heat generating device such as the OA device. That is, when the heating device is stopped, the blowing of the conditioned air is stopped or the air volume is reduced, and when the heating device is operating, the blowing of the conditioned air is started or the air volume is increased. can do.

As described above, the underfloor air conditioning system of the present invention efficiently air-conditions by coping with the uneven heat load in the low heat load region and the high heat load region in the office and the change in the heat load in the high heat load region. Therefore, energy-saving air conditioning can be performed, and comfort can be improved because neither the low heat load region nor the high heat load region is too cold or too hot.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of an underfloor air conditioning system 30 according to the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIG. 1 of the first embodiment of the underfloor air conditioning system 30 of the present invention, the office room 32 is tentatively divided into an upper non-living space 34 and a lower living space 36, and the living space 36 is Further, it is presumably divided into a high heat load region 40 in which a heat generating device such as the OA device 38 is installed and a low heat load region 42 other than that. Also, office 3
A plurality of air outlets 46, 46, ... Are formed on the second floor surface 44, and an underfloor chamber 48 is provided under the floor.
In addition, a plurality of fan units 5 are installed in the underfloor chamber 48.
0, 50 ... Are provided, and the air supply port of the fan unit 50 communicates with the air outlet 46. A plurality of intake ports 54, 54 ... Are formed on the ceiling surface 52 of the office room 32, and a ceiling chamber 56 is provided behind the ceiling.
Also, an air supply duct 58 extending from the underfloor chamber 48.
Is connected to the air supply side of the air conditioner 60, and the return air duct 62 extending from the ceiling chamber 56 is connected to the air intake side of the air conditioner 60.

The air conditioner 60 is composed of a blower 60A, a humidifier 60B, a heating coil 60C, a cooling coil 60D and a filter 60E in order from the air supply side.
0C is connected to a boiler (not shown) through a hot water pipe 64 to circulate hot water. The cooling coil 60D is connected to a refrigerator (not shown) via a cold water pipe 66 to circulate cold water. The humidifier 60B is connected to a water supply device (not shown) via a water supply pipe 68.

A temperature / humidity sensor 70 is attached to one wall of the office 32, and is connected to an air conditioner controller 74 via a signal line 72.
4 through the respective signal lines 76, 78, 80, 82, the blower 60A, the water amount adjusting valve 84 provided in the water supply pipe 68 of the humidifier 60B, the cold water amount adjusting valve 86 provided in the hot water pipe 64, Each is connected to a hot water amount adjusting valve 88 provided in the cold water pipe 66. Thereby, based on the temperature and humidity inside the office 32 detected by the temperature and humidity sensor 70, the blower 60A, the humidifier 60B, the heating coil 60C, and the cooling coil are adjusted so that the temperature and humidity are preset in the air conditioner controller 74. 60D is controlled respectively.

The return air duct 62 is connected to the return air 90.
Exhaust duct 92 and fresh outside air 9
The return air duct 62, the exhaust duct 92, and the outside air introduction duct 96 are provided with dampers 98, 100, and 102, respectively. Described next is the improved part of the present invention. The desks 104 are arranged in the high heat load areas 40 in the office 32, and the office automation equipment 38 is placed on the desks 104. Further, each desk 104 is provided with an optical sensor 106, and each optical sensor 106 has a signal line 110, 112, 11
4, the fan unit controller 108 via
It is connected to the. In addition, from the fan unit controller 108, the respective signal lines 118, 120, 12 are further added.
The fan unit 50 corresponding to the optical sensor 106 in the high heat load region and the air conditioner controller 74 are connected via 2, 124 and 125.

Next, the operation of the underfloor air conditioning system 30 of the present invention constructed as described above will be described below. Air-conditioned air 126 whose temperature and humidity are adjusted by the air conditioner 60
Is supplied to the underfloor chamber 48 via the air supply duct 58, and the fan unit 5 installed in the underfloor chamber 48
It is taken into 0. The conditioned air 126 taken into the fan unit 50 is blown from the fan unit 50 into the office 32 through the air outlet 46 formed on the floor 44 of the office 32. Air-conditioned air blown into the office room 126
Is heated by absorbing the heat of the OA equipment 38 and the lighting 128, and is heated from the intake port 54 formed in the ceiling to the ceiling chamber 56.
Is inhaled. The return air 90 taken into the ceiling chamber 56 exhausts part of the air from the exhaust duct 92 while returning to the air conditioner 60 via the return air duct 62, while introducing fresh outside air 94 from the outside air introduction duct 96. To do. Then, the return air 90 mixed with the outside air 94 is the filter 60E, the cooling coil 60D, the heating coil 60 of the air conditioner 60.
C, the humidity is adjusted through the humidifier 60B, and the blower 60 is adjusted.
Circulation is again supplied to the underfloor chamber 48 by A.

The temperature and humidity of the conditioned air 126 supplied into the office room 32 is controlled by the temperature and humidity sensor 70 provided on one wall of the office room 32 to detect the temperature and humidity inside the office room 32. , The detection result is the air conditioner controller 74
Entered in. Then, the flow valves of the hot water pipe 64 of the heating coil 60C and the cold water pipe 66 of the cooling coil 60D of the air conditioner 60 are adjusted so that the temperature and humidity preset in the air conditioner controller 74 become the temperature and humidity in the office 32. 8
The openings of 6, 88 are adjusted, and the opening of the flow valve 84 of the water supply pipe 68 of the humidifier 60B is adjusted.

The above-described circulation and temperature / humidity control of the conditioned air is similar to the operation of the conventional underfloor air conditioning system.
By the way, looking at the heat load distribution state in the office room 32, due to the increase in the OA equipment 38 installed in the office room 32, a high heat load region 40 around the OA equipment 38 and other low heat load in the office room 32 are found. Region 42 is formed. Also, OA
The equipment 38 is not operated all day long, and is usually operated as needed.
Due to the stop, the heat load in the high heat load region 40 largely changes.

Therefore, in the underfloor air conditioning system 30 of the present invention, the fan unit 5 in the low heat load region 42 is used.
As for 0, a constant air volume is blown into the office 32 as in the conventional case, while the fan unit 50 in the high heat load area 40 is controlled as follows. That is, when a person sits on the chair 130 of the OA equipment 38 to use the OA equipment 38, the presence information of the person is detected by the optical sensor 106, and the detection signal is input to the fan unit controller 108. In the fan unit controller 108, which optical sensor 1
The optical sensor 10 by recognizing whether it is a signal from
The fan unit 50 corresponding to No. 6 is operated to take the conditioned air 126 supplied to the underfloor chamber 48 into the fan unit 50 and blow it into the office 32 from the air outlet 46. In this case, the air volume of the conditioned air blown from the fan unit 50 is reduced before the presence information of the person is detected by the optical sensor 106, and the air volume of the fan unit 50 increases when the presence information of the person is detected. The fan unit controller 108 may be controlled as described above. Further, when the operation of the OA equipment 38 is stopped and a person leaves the chair 130 of the OA equipment 38, the information is input to the fan unit controller 108 by the optical sensor 106,
The operation of the fan unit 50 is stopped. In this case as well, the operation of the fan unit 50 is not stopped and the fan unit 5 is not stopped.
The air volume of 0 may be reduced.

As a result, the fan unit 50 can be controlled according to the change in the heat load due to the operation / stop of the OA equipment 38, and the amount of conditioned air blown into the office 32 can be controlled. Therefore, waste of the conditioned air 126 is eliminated and efficient air conditioning can be performed, and the blower 60
Since the blowing power of A and the fan unit 50 is also reduced,
Energy-saving air conditioning can be performed. Further, since the air conditioning is performed in response to the change in the heat load of the OA equipment 38, comfort can be improved without the low heat load region 42 and the high heat load region 40 being too cold or too hot.

Further, the fan unit controller 108
From, the information on the number of operating OA devices 38 is input to the air conditioner controller 74. In the air conditioner controller 74, the office room 32 from the temperature / humidity sensor 70
The control condition of the air conditioner 60 is determined in accordance with the information on the temperature and humidity inside, and the temperature and humidity of the conditioned air 126 supplied by controlling the air conditioner 60 is adjusted.

In the first embodiment, the OA equipment desk 104
As a detection sensor attached to the bottom of the optical sensor 10
Although 6 is used, any sensor may be used as long as it can judge the presence / absence of a person in the high heat load region 40. Next, FIG. 2 shows a second embodiment of the underfloor air conditioning system of the present invention, and the same members as those in the first embodiment are designated by the same reference numerals and described. As shown in FIG.
Instead of the optical sensor 106 for detecting the presence or absence of a person used in the first embodiment, a sensor microphone 132 is attached to the OA equipment desk 104, and the
The operation sound of the A device 38 is detected. Then, the sound signal detected by the sensor microphone 132 is transmitted to the signal line 13
4 to the fan unit controller 108. The signal input to the fan unit controller 108 is supplied to the amplification unit 10 of the fan unit controller 108.
The signal is amplified at 8A and enters the control unit 108B. Control unit 1
In 08B, which sensor microphone 132 the signal is from is recognized, and the fan unit 50 corresponding to the sensor microphone 132 is operated to blow out the conditioned air from the air outlet 46 into the office 32. Further, when the operation of the OA device 38 is stopped and the sound signal from the sensor microphone 132 is not input to the fan unit controller 108, the fan unit controller 108 stops the operation of the fan unit 50. Also in this case, the fan unit 50 should be operated without stopping or operating.
The air flow rate may be adjusted.

A vibration pickup for detecting the driving vibration of the OA equipment 38 may be used as the detection means for judging the operation / stop of the OA equipment 38. Further, it is not limited to these sensor microphones 132 and vibration pickups, and any detection means may be used as long as it can detect the operation / stop of the OA equipment 38. Thus, the underfloor air conditioning system 30 of the present invention is
Since the air conditioning can be performed in response to the uneven heat loads in the low heat load region 42 and the high heat load region 40 in the office 32 and the change in the heat load in the high heat load region 40, energy saving air conditioning can be performed, and Comfort can be improved.

Although the underfloor air conditioning system 30 using the fan unit 50 has been described in the first and second embodiments, the conditioned air from the air conditioner 60 can be used without using the fan unit 50 as shown in FIG. It is also applicable when 126 is blown out from the outlet 46 on the floor surface by the static pressure of the underfloor chamber 48. In this case, a damper type blowout amount adjuster 13 is provided at the blowout port of the high heat load region 40.
6 is provided.

[0026]

As described above, according to the underfloor air-conditioning system of the present invention, the air-conditioning room is divided into a high heat load area in which heat generating equipment such as OA equipment is installed and a low heat load area other than that. In the high heat load region, detection means is provided for detecting the presence or absence of a person or the operation / stop of a heat generating device such as an OA device. Further, blowout amount adjusting means is provided at each of the outlets in the high heat load region, and the control means controls the operation of the blowout amount adjusting means and the air volume based on the detection result of the detecting means. As a result, the conditioned air is constantly blown out from the outlet in the low heat load area at a constant air volume, while the operation and the blowout amount adjusting means of the outlet in the high heat load area is performed based on the presence information of the person in the high heat load area. The air volume can be controlled and the conditioned air can be blown out individually for each outlet.

Therefore, since air conditioning can be performed in response to the uneven heat load in the low heat load region and the high heat load region in the air-conditioned room and the change in the heat load in the high heat load region, waste of the air-conditioned air is eliminated and efficiency is improved. Along with being able to air-condition,
Since the power for blowing the conditioned air is also reduced, energy-saving air conditioning can be performed. Further, since the blowing amount of the conditioned air is controlled so as to remove the heat load depending on the presence or absence of the heat load of the heat generating device such as the OA device, the high heat load region may be too cold or too hot. You can improve comfort without.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of an underfloor air conditioning system according to the present invention.

FIG. 2 is a configuration diagram of a main part of a second embodiment of an underfloor air conditioning system according to the present invention.

FIG. 3 is a configuration diagram when the fan unit of the underfloor air conditioning system according to the present invention is not used.

[Fig. 4] Configuration diagram of a conventional underfloor air conditioning system

FIG. 5 is a state diagram showing an air conditioning state of a conventional underfloor air conditioning system.

[Explanation of symbols]

 30 ... Underfloor air conditioning system 32 ... Office 38 ... OA equipment 40 ... High heat load area 42 ... Low heat load area 46 ... Blowout port 50 ... Fan unit 60 ... Air conditioner 106 ... Optical sensor 108 ... Fan unit controller 132 ... Sensor microphone

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kunio Nishiyama Inventor Kunio Nishiyama 1-1-14 Uchikanda, Chiyoda-ku, Tokyo Within Niitsu Plant Construction Co., Ltd. (72) Taku Kuribayashi 1 Uchikanda, Chiyoda-ku, Tokyo 1-14 No. 1 in Nisit Plant Construction Co., Ltd. (72) Inventor Toshihiko Yamazaki 1-1-14-1 Kanda, Uchida, Chiyoda-ku, Tokyo

Claims (4)

[Claims] 1. An underfloor air conditioning system in which conditioned air from an air conditioner is blown into a plurality of air outlets formed on a floor of an air conditioning room into the air conditioning room, wherein a heat generating device such as an OA device is installed in the air conditioning room. Provide a person detection means for detecting the presence information of the person in the high heat load area by dividing the installed high heat load area and other low heat load area, each of the plurality of outlets in the high heat load area Each of the outlets is provided with an outlet amount adjusting means, and a control means for controlling the operation of the outlet amount adjusting means and the air volume based on the detection result of the person detecting means is provided, and the conditioned air is blown out from the plurality of outlets. Is an underfloor air-conditioning system characterized by being divided into constant blowouts in the low heat load region and individual blowouts in the high heat load region. 2. An underfloor air conditioning system in which conditioned air from an air conditioner is blown into a plurality of air outlets formed in a floor of an air conditioning room into the air conditioning room, wherein a heat generating device such as an OA device is installed in the air conditioning room. A high heat load area installed and an operation detection means for detecting the start / stop of the heat generating device in the high heat load area by dividing into a low heat load area other than that, the high heat load area of the plurality of outlets In each of the air outlets, a blowout amount adjusting means is provided, and a control means for controlling the operation of the blowout amount adjusting means and the air volume based on the detection result of the operation detecting means is provided, and the air conditioners from the plurality of air outlets are provided. An underfloor air-conditioning system characterized by dividing the air blowout into a constant blowout in the low heat load region and an individual blowout in the high heat load region. 3. The underfloor air conditioning system according to claim 2, wherein the operation detecting means is a sensor microphone for detecting an operating sound of the heat generating device. 4. The underfloor air conditioning system according to claim 2, wherein the operation detecting means is a vibration detector that detects an operating vibration of the heat generating device.