JPH06159730A - Air-conditioning system - Google Patents

Abstract

PURPOSE:To provide an air-conditioning system, capable of reducing the load of an air-conditioning machine and permitting energy saving air-conditioning, by permitting the temperature control of a perimeter zone so as to eliminate heat energy loss due to the mixing of warm-air in the perimeter zone with cold air in an interior zone. CONSTITUTION:Air-conditioning air 7 for cooling, which is supplied from an air-conditioning machine 32 into an underfloor chamber 26, is sent into an office 16 and is heated by OA instruments 76 and the like, then, sucked into a ceiling chamber 28 to return it into the air-conditioning machine 32 while the wall 146 and the window 48 of a perimeter zone 14 are formed of double structure to form a passage 49 and ventilate the air in the ceiling chamber 28 into the passage 149 by a fan 52 for perimeter. According to this method, the temperature control of the perimeter zone 14 in winter and summer can be effected efficiently and heat energy loss, due to the mixing of cold air in an interior zone 12 with warm-air in the perimeter zone 114 such as in an air-conditioning system so far, is eliminated whereby energy saving air-conditioning can be effected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system,
In particular, the present invention relates to an air conditioning system in an office or the like that requires annual cooling due to heat from a heating element such as office automation equipment.

[0002]

2. Description of the Related Art In recent years, in intelligent buildings and the like in which a large number of automation devices such as personal computers and workstations (hereinafter referred to as OA devices) are installed, the floor is formed into a double floor with a free access floor, etc.
Power wiring for equipment A and local area network (L
A communication cable such as AN) is laid between the double floors. Along with this, a double floor has been increasingly used as a chamber of a floor blowing air conditioning system. That is, this is a system in which the conditioned air supplied from the air conditioner to the double floor is blown into the room from the air outlet formed in the double floor, sucked from the return air port formed in the ceiling chamber, and returned to the air conditioner.

In addition, in an office room in which a large number of OA equipments are installed in this way, the sensible heat of the room increases due to the heat generated from the OA equipments, etc., and the temperature in the office room rises. There is. However, in the case of cooling the office room in winter, there is a drawback that if the interior zone is adjusted to an appropriate temperature, it will be too cold in the perimeter zone that is cooled by the radiant cold heat of the outside air. In order to solve this drawback, in the conventional air conditioning system, as shown in FIG. 5, in addition to an air conditioner (not shown) that cools the office room 1 throughout the year, heat is exchanged in order to heat the perimeter zone 2 in winter. The fan coil unit 5 including the container 3 and the fan 4 is provided, and warm air is blown from the air outlet 7 formed on the side of the perimeter zone 2 of the ceiling chamber 6 to heat the perimeter zone 2.

[0004]

However, the conventional air conditioning system is a system for heating the perimeter zone 2 by directly blowing warm air to the perimeter zone 2 in winter. Therefore, interior zone 8 and perimeter zone 2
In the boundary area between and, the cold air in the interior zone 8 and the warm air in the perimeter zone 2 are mixed, so that the heat energy loss becomes large. As a result, not only the heating efficiency of the perimeter zone 2 deteriorates but also the interior zone 8 becomes difficult to cool, so that there is a problem that the temperature of the conditioned air 9 from the air conditioner has to be lowered and the electric power cost increases.

Under such circumstances, there is a demand for an energy-saving type air conditioning system capable of efficiently heating the perimeter zone 2 in winter. In addition, there is a problem that the perimeter zone 2 is hard to cool in the summer due to the influence of high temperature radiant heat of the outside air, and a countermeasure against this is also demanded. The present invention has been made in view of such circumstances, and it is possible to manage the temperature of the perimeter zone so that there is no heat energy loss due to mixing of warm air in the perimeter zone and cold air in the interior zone. , The load of the air conditioner is reduced, and an object is to provide an air conditioning system capable of energy saving air conditioning.

[0006]

In order to achieve the above object, the present invention blows conditioned air from an air conditioner through an underfloor chamber into an air conditioning zone consisting of an interior zone and a perimeter zone, and from the ceiling chamber. In an air-conditioning system in which air is drawn and returned to the air-conditioner for circulation, a wall and / or window of the perimeter zone is formed in a double structure to form a passage, and the ceiling chamber or the upper part of the air-conditioning zone is formed. And an air supply means for supplying a part of the air sucked into the ceiling chamber or a part of the air above the air conditioning zone to the passage. To do.

[0007]

According to the present invention, the walls and windows of the perimeter zone are formed in a double structure to form a passage, which is communicated with the ceiling chamber or the upper part of the air conditioning zone, and the air sucked into the ceiling chamber is A part or a part of the air in the upper part of the air conditioning zone is supplied to the passage by the air supply means. That is, the conditioned air for cooling supplied from the air conditioner to the underfloor chamber is blown out to the air conditioning zone and warmed by the OA equipment or the like, and then is sucked from the ceiling chamber and returned to the air conditioner.
At this time, when the air supply means is operated, a part of the air sucked into the ceiling chamber or a part of the air above the air conditioning zone is sent to the passage.

[0008] Thus, when heating of the perimeter zone is required in winter, the walls and windows of the perimeter zone cooled by the low temperature radiant heat in winter can be heated, so that the effect of the low temperature radiant heat of the outside air can be reduced. In addition, the perimeter zone can be radiantly heated by the heat of the heated wall or window. In addition, when the temperature of the walls and windows of the perimeter zone becomes higher than the temperature of the air sucked into the ceiling chamber or the air above the air conditioning zone when heated by the high temperature radiant heat of the outside air in the summer, the ceiling chamber or the air conditioning zone upper part By cooling the walls and windows to the temperature of the air to be supplied by sending the air of the above to the passage, it is possible to reduce the effect of high temperature radiant heat and to cool the perimeter zone by the cold heat of the cooled walls and windows. Can be radiantly cooled.
If the temperature of the air sucked into the ceiling chamber or the air temperature in the upper part of the air conditioning zone is too high and the air is fed into the double structure and rather warms the walls and windows, stop the operation of the air feeding means. Stop the air supply in the double structure.

As described above, in the air conditioning system of the present invention, a part of the air taken into the ceiling chamber or a part of the air above the air conditioning zone is sent to the passage to control the temperature of the perimeter zone. As a result, unlike the conventional air conditioning system, heat energy loss due to the mixture of cold air in the interior zone and warm air in the perimeter zone is eliminated, and energy-saving air conditioning can be performed.

Further, in the present invention, a damper for adjusting the amount of air is provided near the inlet of the passage, and a detecting means for detecting the temperature of the perimeter zone and the radiation temperature is provided near the window. Then, the control means calculates an operating temperature (a temperature that a human feels as a sensible temperature), which is an arithmetic mean value of the temperature and the radiation temperature, and adjusts the opening degree of the damper so that the calculated value becomes a preset temperature. I tried to control it. This reduces the temperature change in the perimeter zone and stabilizes the temperature of the conditioned air supplied from the air conditioner, so that more energy-saving air conditioning can be performed and the temperature of the perimeter zone can be adjusted by adding radiant heat. Can be managed, so the comfort of the perimeter zone can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of an air conditioning system according to the present invention will be described below in detail with reference to the accompanying drawings. The air-conditioning system of the present invention relates to an air-conditioning system in an office or the like that requires annual cooling with heat from a heating element such as office automation equipment, and efficiently manages the temperature of a perimeter zone. .

As shown in FIG. 1, an interior zone and a 1
Floor 18 of office room 16 consisting of two perimeter zones 14
Is provided with a plurality of blowout units 20 mainly including an air supply fan 20A, and a ceiling 22 is provided with a plurality of intake ports 2
4, 24 ... Are formed. Further, an underfloor chamber 26 is formed under the floor of the office room 16 and a ceiling chamber 28 is formed under the ceiling, and the underfloor chamber 26 is provided with an air supply duct 30.
To the air supply side of the air conditioner 32 via the ceiling chamber 2
8 communicates with the intake side of the air conditioner 32 via the return air duct 34. Further, a return air damper 36 is provided at the inlet of the return air duct 34 so that the amount of air returned from the ceiling chamber 28 to the air conditioner 32 can be adjusted. Also,
An outside air intake duct 38 is branched to the return air duct 34, and an outside air damper 40 provided in the outside air intake duct 38 can adjust the intake amount of the outside air. Also,
The air conditioner 32 includes a cooler 42 and a blower 44, and cools the air returned from the ceiling chamber 28 and sends the cooled air back to the underfloor chamber 26.

Next, the improved portion of the present invention will be described. The wall 46 and the window 48 of the perimeter zone 14 of the office 16 are formed in a double structure and form an air passage 49. The upper end of the passage 49 communicates with the ceiling chamber 28, and the lower part communicates with the outside through the lower outlet 50. Also, the perimeter zone 1 in the ceiling chamber 28
A perimeter blower 52 is provided on the fourth side, and an air outlet 52A of the perimeter blower 52 is branched into two directions, one of which is capable of supplying air to the passage 49 via an air damper 54. The other end is connected to an upper discharge port 58 communicating with the outside through an exhaust damper 56. In addition, the window 48 of the perimeter zone 14 has the perimeter zone 14
A temperature sensor 60 for detecting the temperature and the radiation temperature is provided, and is connected via a cable 62 to a working temperature calculator 64 for calculating a working temperature (a temperature felt by a human as a sensible temperature). The operating temperature calculator 64 is connected to the controller 68 via a cable 66, and the controller 68
Is a damper 54 for air supply via the respective cables 70 and 72.
And the drive unit of the exhaust damper 56.

Next, the operation of the air conditioning system 10 of the present invention configured as described above will be described below. The air-conditioning air 74 for cooling at about 20 ° C. that has been air-conditioned by the air conditioner 32 passes through the air supply duct 30 and the underfloor chamber 26, and is blown into the office 16 by the blowing unit 20. The conditioned air 74 for cooling blown to the office 16 is the OA equipment 76 of the office 16.
Absorbs heat from heating elements such as lighting fixtures 78 and human body 80,
It warms up to about 30 ° C, becomes lighter and rises. The rising air 82 is sucked into the ceiling chamber 28 via the intake port 24 on the surface of the ceiling 22. The air 82 sucked into the ceiling chamber 28 passes through the ceiling chamber 28 and the return air duct 34 to replenish the outside air from the outside air intake duct 38 and returns to the air conditioner 40. At this time, when the perimeter blower 52 is operated, a part of the air in the ceiling chamber 28 sucked into the perimeter blower 52 is sent to the passage 49 and discharged to the outside from the lower discharge port 50. The remaining air is discharged to the outside through the upper discharge port 58. The amount of air sent to the passage is adjusted by the opening degree of the air supply damper 54 and the exhaust damper 56.
The opening degree of is controlled as follows. That is, the temperature sensor 60 provided in the window 48 of the perimeter zone 14 detects the temperature and radiation temperature of the perimeter zone 14 and inputs them to the working temperature calculator 64. The working temperature calculator 64 calculates the arithmetic mean value of the temperature of the perimeter zone 14 and the radiation temperature, and the calculated temperature and the working temperature calculator 6 in advance.
The comparison calculation with the set temperature input in 4 is performed, and the comparison calculation value is input to the controller 68. Then, the controller 68 controls the opening degrees of the air supply damper 54 and the exhaust damper 56 so that the calculated values converge to the set temperature.

For example, when the wall 46 and the window 48 of the perimeter zone 14 are cooled by the low temperature radiant heat of the outside air in winter and the operating temperature is lowered, the air supply damper 54 is fully opened as shown in FIG. The exhaust damper 56 is fully closed, and all the air in the ceiling chamber sent from the perimeter blower 52 is sent to the passage 49. When the operating temperature reaches the set temperature, the opening degrees of the air supply damper 54 and the exhaust damper 56 are adjusted to maintain the operating temperature at the set temperature. As a result, the wall 46 and the window 48 of the perimeter zone 14 cooled by the low temperature radiant heat in winter can be heated, so that the influence of the low temperature radiant heat of the outside air can be reduced and the heated wall 46 and the window 48 can be reduced. The perimeter zone 14 can be radiantly heated by the heat.

Further, in the summer, when the influence of the high temperature radiant heat of the outside air is small and the wall 46 and the window 48 of the perimeter zone 14 do not become hot, that is, the temperature of the air taken into the ceiling chamber 28 is higher than the working temperature, and the air is sent to the passage 49. When the working temperature deviates from the set temperature because the wall 46 and the window 48 are warmed by the air, the air supply damper 54 is fully closed and the exhaust damper 56 is fully opened as shown in FIG. All the air in the ceiling chamber 28 sent from the perimeter blower 52 is exhausted to the outside from the upper discharge port 58 to perform only ventilation in the office room. However, when the influence of the high temperature radiant heat of the outside air is large and the walls 46 and the windows 48 of the perimeter zone 14 are hot, that is, when the temperature of the air taken into the ceiling chamber 28 is lower than the operating temperature, the same as shown in FIG. Thus, the air supply damper 54 is opened and the exhaust damper is closed, and the air in the ceiling chamber 28 is supplied to the passage 49. As a result, the wall 46 of the perimeter zone 28 and the window 48 that have become hot due to the high temperature radiant heat of the outside air can be cooled to the temperature of the air to be sent, so that the effect of the high temperature radiant heat can be reduced and the cooled wall 46 and window 48 can be reduced. The perimeter zone can be radiatively cooled by the cold heat of.

As described above, in the air conditioning system 10 of the present invention, the wall 46 and the window 48 of the perimeter zone 28 are double-structured to form the passage 49, and the ceiling chamber 28 is formed in the passage 49.
Since the air taken in by the air is sent to the air, there is no heat energy loss due to the mixture of the cool air in the interior zone and the warm air in the perimeter zone, unlike the conventional air conditioning system. As a result, not only can the heating efficiency of the perimeter zone be improved in the winter season, but there is no adverse effect that the interior zone is hard to cool due to mixing, so it is necessary to lower the temperature of the conditioned air 74 from the air conditioner 32 more than necessary. Energy-saving air conditioning can be performed. Also,
Even in the summer, the effect of high temperature radiant heat is reduced and the perimeter zone 14 is easily cooled. Therefore, it is not necessary to lower the temperature of the conditioned air 74 from the air conditioner 32 more than necessary to cool the perimeter zone. It can be performed.

Further, the opening of the air supply damper 54 and the exhaust damper 56 can be controlled so that the perimeter zone 14 is converged to the set temperature. This allows
Since the temperature change in the perimeter zone 14 is reduced and the temperature of the conditioned air 74 supplied from the air conditioner 32 can be stabilized, energy saving air conditioning can be performed, and
Since the temperature of the perimeter zone 14 can be controlled by adding the radiant heat, the comfort of the perimeter zone 14 can be improved.

In this embodiment, the fan 52 for the perimeter is used.
Although the air is forcibly supplied to the inside of the passage 49, the perimeter fan 52 may be omitted as shown in FIG. 4 when the air supply amount does not matter.

[0020]

As described above, according to the air conditioning system of the present invention, the walls and windows of the perimeter zone are formed in a double structure to form a passage and communicate with the ceiling chamber or the upper part of the air conditioning zone. At the same time, a part of the air sucked into the ceiling chamber or a part of the air above the air conditioning zone is sent to the passage by the air supply means. As a result, the temperature of the perimeter zone in winter and summer can be efficiently managed, and the heat energy loss due to the mixture of cold air in the interior zone and warm air in the perimeter zone, as in the conventional air conditioning system. Energy saving air conditioning can be performed.

Further, in the present invention, the operating temperature calculated as the arithmetic mean value of the temperature of the perimeter zone and the radiation temperature is converged to the set temperature. This reduces the temperature change in the perimeter zone and stabilizes the temperature of the conditioned air supplied from the air conditioner, so that more energy-saving air conditioning can be performed and the temperature of the perimeter zone can be adjusted by adding radiant heat. Can be managed, so the comfort of the perimeter zone can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of an air conditioning system according to the present invention.

FIG. 2 is a sectional view of an essential part for explaining the operation of the air conditioning system according to the present invention.

FIG. 3 is a sectional view of an essential part for explaining the operation of the air conditioning system according to the present invention.

FIG. 4 is a sectional view showing another embodiment of the air conditioning system of the present invention.

FIG. 5 is a sectional view of a main part of a conventional air conditioning system.

[Explanation of symbols]

 10 ... Air-conditioning system 12 ... Interior zone 14 ... Perimeter zone 16 ... Office room 26 ... Underfloor chamber 28 ... Ceiling chamber 32 ... Air conditioner 46 ... Wall 48 ... Window 49 ... Dual structure 52 ... Perimeter fan 54 ... Air blower Damper 56 ... Exhaust damper 60 ... Temperature sensor 64 ... Working temperature calculator 68 ... Controller

Claims (2)

[Claims] 1. An air conditioning system in which conditioned air is blown from an air conditioner through an underfloor chamber to an air conditioning zone consisting of an interior zone and a perimeter zone, and is sucked from the ceiling chamber and returned to the air conditioner to circulate again. The wall and / or window of the perimeter zone are formed in a double structure to form a passage, which is communicated with the ceiling chamber or the upper part of the air conditioning zone, and a part of the air sucked into the ceiling chamber. Alternatively, the air conditioning system is provided with an air supply means for supplying a part of the air above the air conditioning zone to the passage. 2. A damper for adjusting the amount of air is provided in the vicinity of the inlet of the double-structured passage, detection means for detecting the temperature of the perimeter zone and radiant heat is provided in the vicinity of the window, and the temperature detected by the detection means is provided. 2. An air conditioner according to claim 1, further comprising control means for calculating an arithmetic mean value of the radiation temperature and the radiation temperature and controlling the opening degree of the damper so that the calculated value becomes a preset temperature. system.