JP2970272B2 - Air conditioning system - Google Patents

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 by 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 (hereinafter referred to as OA devices) such as personal computers and workstations are installed, the floor is formed as a double floor with a free access floor or the like.
Power wiring and local area network (L
AN) etc. are routed between the double floors. Along with this, a double floor has often been used as a chamber of a floor blowing air conditioning system. That is, the conditioned air supplied from the air conditioner to the double floor is blown into the room from the outlet formed in the double floor, and is sucked from the return air port formed in the ceiling chamber and returned to the air conditioner.

In an office where a large number of OA equipments are installed, heat generated by the OA equipments increases indoor sensible heat and increases the temperature in the offices. There is. However, when cooling the office room in winter, there is a disadvantage that if the interior zone is adjusted to an appropriate temperature, the perimeter zone, which is cooled by the cold radiant heat of the outside air, is too cold. In order to solve this drawback, in the conventional air conditioning system, as shown in FIG. 5, a heat exchange system is used to heat the perimeter zone 2 in winter separately from an air conditioner (not shown) that cools the office 1 throughout the year. A fan coil unit 5 composed of a heater 3 and a fan 4 is provided, and warm air is blown out from an 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 heats 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 region between the two, the cool air in the interior zone 8 and the warm air in the perimeter zone 2 are mixed, so that the heat energy loss increases. As a result, not only the heating efficiency of the perimeter zone 2 is deteriorated, but also the interior zone 8 is hardly cooled, so that the temperature of the conditioned air 9 from the air conditioner has to be reduced, and there is a problem that the power cost increases.

[0005] From such a background, 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 difficult to cool down in summer due to the influence of high-temperature radiant heat of the outside air. The present invention has been made in view of such circumstances, and since the temperature of the perimeter zone can be controlled so that there is no heat energy loss due to the mixing of the warm air in the perimeter zone and the cool air in the interior zone. It is another object of the present invention to provide an air conditioning system capable of performing energy saving air conditioning by reducing the load on the air conditioner.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides an air conditioner which blows out conditioned air from an air conditioner through an underfloor chamber into an air conditioning zone comprising an interior zone and a perimeter zone. In an air conditioning system that takes air and returns to the air conditioner, the 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 air supply means for supplying a part of the air taken into the ceiling chamber or a part of the air above the air conditioning zone to the passage. I do.

[0007]

According to the present invention, the wall and the window of the perimeter zone are formed in a double structure to form a passage, which communicates with the ceiling chamber or the upper part of the air conditioning zone. A part or a part of the air above the air conditioning zone is supplied to the passage by an air supply means. That is, the cooling air-conditioning air supplied from the air conditioner to the underfloor chamber is blown out to the air-conditioning zone and heated 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 taken into the ceiling chamber or a part of the air above the air conditioning zone is supplied to the passage.

Accordingly, 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 influence of the low-temperature radiant heat of the outside air can be reduced. In addition, the perimeter zone can be radiated and heated by the heat of the heated walls and windows. Also, if 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 temperature of the air above the air conditioning zone in the summer due to the high temperature radiant heat of the outside air, Can be cooled down to the temperature of the air that blows the walls and windows by blowing the air through the passages, so that the effects of high-temperature radiant heat can be reduced and the perimeter zone can be cooled by the cold heat of the cooled walls and windows. Can be cooled by radiation.
If 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 walls and windows are heated instead of being blown into the double structure, the operation of the blower is stopped. 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 supplied 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 mixing of the cool air in the interior zone and the 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 entrance 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 felt by a human as the sensible temperature), which is an arithmetic average of the temperature and the radiation temperature, and adjusts the opening degree of the damper so that the calculated value becomes a preset temperature. Controlled. As a result, the temperature change of the perimeter zone is reduced, and the temperature of the conditioned air supplied from the air conditioner can be stabilized, so that more energy-saving air conditioning can be performed, and the temperature of the Therefore, the comfort of the perimeter zone can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments 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 room or the like that requires annual cooling by heat from a heating element such as office automation equipment, and efficiently manages the temperature of a perimeter zone. .

As shown in FIG. 1, the interior zone and 1
Floor 18 of office 16 comprising 2 ぺ meter zone 14
Are provided with a plurality of blowout units 20 mainly composed of an air supply fan 20A, and a plurality of intake ports 2 are provided on a ceiling 22.
4, 24... Are formed. An underfloor chamber 26 is formed under the floor of the office 16, a ceiling chamber 28 is formed behind the ceiling, and the underfloor chamber 26 is provided with an air duct 30.
To the air supply side of the air conditioner 32 through the ceiling chamber 2
8 communicates with the air intake side of the air conditioner 32 via a return air duct 34. A return air damper 36 is provided at the entrance 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 branches off from the return air duct 34, and the amount of outside air taken in can be adjusted by an outside air damper 40 provided in the outside air intake duct 38. Also,
The air conditioner 32 is composed of a cooler 42 and a blower 44, and cools the air returned from the ceiling chamber 28 and sends it to the underfloor chamber 26 again.

Next, the improvement 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, forming 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 a 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 supply port 52A of the perimeter blower 52 is branched into two sides, and one of them can supply air to the passage 49 via an air supply damper 54. The other is connected to an upper outlet 58 that communicates with the outside via an exhaust damper 56. Further, the perimeter zone 14 is provided in the window 48 of 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 an operating temperature calculator 64 for calculating an operating temperature (a temperature felt by a human as a sensible temperature). The operating temperature calculator 64 is connected to a controller 68 via a cable 66, and the controller 68
Is the air damper 54 via the respective cables 70 and 72.
And a drive unit of the exhaust damper 56.

Next, the operation of the air conditioning system 10 according to the present invention having the above-described configuration will be described below. The conditioned air 74 for cooling at about 20 ° C., which is air-conditioned by the air conditioner 32, passes through the air supply duct 30 and the underfloor chamber 26 and is blown out to the office 16 by the blowout unit 20. The air-conditioning air 74 for air-conditioning blown out to the office 16 is supplied to the OA equipment 76 of the office 16.
Absorb heat from heating elements such as lighting fixtures 78 and human body 80,
It is warmed to about 30 ° C and becomes lighter and rises. The raised air 82 is sucked into the ceiling chamber 28 via the air inlet 24 on the ceiling 22 surface. The air 82 sucked into the ceiling chamber 28 passes through the ceiling chamber 28 and the return air duct 34, replenishes fresh 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 blown into the passage 49 and discharged from the lower discharge port 50 to the outside. 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 degree of opening of the air sending damper 54 and the exhaust damper 56.
Is controlled as follows. That is, the temperature of the perimeter zone 14 and the radiation temperature are detected by the temperature sensor 60 provided in the window 48 of the perimeter zone 14, and are input to the working temperature calculator 64. The operating temperature calculator 64 calculates the arithmetic average of the temperature of the perimeter zone 14 and the radiation temperature, and preliminarily calculates the calculated value and the operating temperature calculator 6.
A comparison operation with the set temperature input to 4 is performed, and the comparison operation 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 value converges to the set temperature.

For example, when the working temperature is lowered by cooling the wall 46 and the window 48 of the perimeter zone 14 by low-temperature radiant heat of the outside air in winter, as shown in FIG. The exhaust damper 56 is fully closed, and all the air in the ceiling chamber blown from the perimeter blower 52 is blown into the passage 49. When the operation temperature reaches the set temperature, the opening degree of the air supply damper 54 and the exhaust damper 56 is adjusted to maintain the operation temperature at the set temperature. Thereby, the wall 46 and the window 48 of the perimeter zone 14 cooled by the low-temperature radiant heat in winter can be warmed, 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 heated. The perimeter zone 14 can be radiated and heated by the heat.

In summer, when the effect of the high-temperature radiation heat of the outside air is small and the walls 46 and the windows 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 If the operating temperature deviates from the set temperature to warm the walls 46 and the windows 48 instead, as shown in FIG. 3, the air supply damper 54 is fully closed and the exhaust damper 56 is fully open, as shown in FIG. All the air in the ceiling chamber 28 blown from the perimeter blower 52 is exhausted to the outside through the upper outlet 58, and only the ventilation in the office room is performed. However, when the effect of the high-temperature radiation 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 working temperature, the same as shown in FIG. Thus, the air damper 54 is opened and the exhaust damper is closed, and the air in the ceiling chamber 28 is sent to the passage 49. Thus, the temperature of the air that is supplied to the walls 46 and windows 48 of the perimeter zone 28 heated by the high-temperature radiant heat of the outside air can be cooled to the temperature at which the air is sent. Radiation cooling of the perimeter zone can be performed by the cold heat.

As described above, the air conditioning system 10 of the present invention forms the passage 49 by forming the wall 46 and the window 48 of the perimeter zone 28 in a double structure, and the ceiling 49 is formed in the passage 49.
As described above, unlike the conventional air conditioning system, there is no heat energy loss due to mixing of the cool air in the interior zone and the warm air in the perimeter zone. As a result, not only can the heating efficiency of the perimeter zone be improved in winter, but also there is no adverse effect that the interior zone becomes difficult to cool down due to the 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 summer, the effect of the 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 degree of the air supply damper 54 and the exhaust damper 56 can be controlled so that the perimeter zone 14 converges 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 managed in consideration of the radiant heat, the comfort of the perimeter zone 14 can be improved.

In this embodiment, the blower 52 for the perimeter is used.
Is provided to forcibly supply air into the passage 49. However, if the amount of air supply does not have to be a problem, the perimeter blower 52 can be omitted as shown in FIG.

[0020]

As described above, according to the air conditioning system of the present invention, the wall and the window 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 taken into the ceiling chamber or a part of the air above the air conditioning zone is supplied to the passage by an air supply means. As a result, the temperature of the perimeter zone in winter and summer can be efficiently controlled, and the heat energy loss due to the mixing of the cool air in the interior zone and the warm air in the perimeter zone as in the conventional air conditioning system. And 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, the radiation temperature, and the arithmetic mean value is made to converge to the set temperature. As a result, the temperature change of the perimeter zone is reduced, and the temperature of the conditioned air supplied from the air conditioner can be stabilized, so that more energy-saving air conditioning can be performed, and the temperature of the Therefore, the comfort of the perimeter zone can be improved.

[Brief description of the 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]

 DESCRIPTION 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 ... Double structure 52 ... Blower for remetering 54 ... For air supply Damper 56: Exhaust damper 60: Temperature sensor 64: Working temperature calculator 68: Controller

Claims (2)

(57) [Claims] An air conditioning system which blows out conditioned air from an air conditioner through an underfloor chamber to an air conditioning zone comprising an interior zone and a perimeter zone, takes in air from a ceiling chamber, returns the air to the air conditioner again, and circulates. The wall and / or the window of the perimeter zone are formed in a double structure to form a passage, communicate with the ceiling chamber or the upper part of the air conditioning zone, and a part of the air taken into the ceiling chamber. Alternatively, the air conditioning system is provided with an air feeding means for feeding a part of the air above the air conditioning zone to the passage. 2. A damper for adjusting an amount of air is provided near an inlet of the double-structured passage, a detecting means for detecting the temperature and radiant heat of the perimeter zone is provided near the window, and a temperature detected by the detecting means. 2. An air conditioning system according to claim 1, further comprising a control means for calculating an arithmetic mean value of the radiation temperature and the radiation temperature, and controlling an opening degree of the damper so that the calculated value becomes a preset temperature. system.