JPS63306336A - Underfloor air-conditioning system - Google Patents

Abstract

PURPOSE:To permit the optimum control of circulating air stream in accordance with air- conditioning conditions, by a method wherein a first communicating passage between a double ceiling and the outside of a house, a second communicating passage between the first communicating passage and the upstream side of a heat exchanger, a third communicating passage between an above-floor suction port and the outside of the house and a fourth communicating passage from the third communicating passage to the upstream side of the heat exchanger are provided. CONSTITUTION:During room cooling in summer, for example, first and fourth dampers 51, 65 are opened and second and third dampers 55, 61 are closed to discharge comparatively high temperature cool air in a double ceiling 29 through the first communicating passage 53. Comparatively low temperature cool air near a floor panel 33 is taken into the upstream side of the cooling coil 41 of an air-conditioning machine 39 through an above floor suction port 59 and third and fourth communicating passages 63, 67. During room heating in winter, the dampers 51, 65 are closed and the dampers 55, 61 are opened to discharge comparatively low temperature warm-air near the floor panel 33 to the outside of the house through the third communicating passage 63 and supply warm-air in the double ceiling 29 to the upstream side of a heating coil 43 through the communicating passages 53, 57. Thus, circulating air stream may be controlled optimally in accordance with air-conditioning conditions.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to underfloor air conditioning systems.

[Conventional technology]

Recently, in office buildings, etc., a space is formed under the floor, hot or cold air is supplied to this space, and this hot or cold air is blown into the room from the outlet formed on the floor surface, and the indoor air is heated. Underfloor air conditioning - Air conditioning is provided.

FIG. 5 shows a conventional underfloor air conditioning system. In this system, hot or cold air from the air conditioner 11 passes through a space 15 formed at the bottom of the floor panel 13 and is formed in the floor panel 13. underfloor air-conditioning outlet 17 into the indoor room 19,
9 air conditioning is performed.

[Problems to be Solved by the Invention] However, in such a conventional underfloor air conditioning system, the air conditioner 11 draws air from the upper part of the casing 21 of the air conditioner 11 into the floor panel 13 from the lower part of the casing 21. Even when the air conditioning conditions are completely different, such as warm air conditioning in winter and cold air conditioning in summer, it is not possible to properly control the circulating airflow, and the indoor environment cannot be improved. There was a problem that there were limits to what could be done.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an underfloor air conditioning system that can easily perform optimal control of circulating airflow according to air conditioning conditions.

[Means for solving problems]

The underfloor air conditioning system according to the present invention blows hot or cold air from an air conditioner into a double floor, and supplies the hot or cold air from a blowout grill formed in a floor panel into a room having a double ceiling. In the underfloor air conditioning system, there is a first communication path that communicates the double ceiling with the outside and in which a first damper is arranged, and a first communication path that branches off from the first communication path and is upstream of the heat exchanger of the air conditioner. a second communication path that communicates with the side and in which a second damper is disposed; a third communication path that communicates between the above-mentioned floor suction port near the floor panel in the room and the outside and in which a third damper is disposed; This third
and a fourth communication path that branches off from the communication path and communicates with the upstream side of the heat exchanger of the air conditioner, and in which a fourth damper is disposed.

[Action of the invention]

In the present invention, for example, during cold air conditioning in summer, the first damper and the fourth damper are opened, and the second damper and the third damper are closed.

This allows the relatively high temperature cold air inside the double ceiling to
On the other hand, relatively low-temperature cold air near the floor panel passes through a third communication path and a fourth communication path and is supplied to the upstream side of the heat exchanger. .

In other words, during cold air conditioning, relatively low-temperature cold air near the floor panel is taken into the air conditioner and further cooled by a heat exchanger, while relatively high-temperature cold air in the double ceiling is discharged to the outside. It happens.

On the other hand, during warm air conditioning in winter, the first damper and the fourth damper are closed, and the second damper and the third damper are opened.

As a result, relatively low-temperature warm air near the floor panel is discharged to the outside through the third communication path, while relatively high-temperature warm air in the double ceiling is discharged to the outside through the first communication path and the second communication path. It passes through the passage and is supplied to the upstream side of the heat exchanger.

In other words, during warm air conditioning, relatively high-temperature warm air inside the double ceiling is taken into the air conditioner and further heated by the heat exchanger, while relatively low-temperature warm air near the floor panel is discharged to the outside. It happens.

[Embodiments of the invention]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the underfloor air conditioning system of the present invention, and in the figure, reference numeral 23 indicates a building such as a building.

A room 25 such as an office is formed in this building 23, and the floor of the room 25 is a double floor 27 and the ceiling is a double ceiling 29.

The double floor 27 is composed of a floor slab 31 and a floor panel 33, and the floor panel 33 is of a free access type.

Fan units 35 are arranged on this floor panel 33 at required positions.

A return air port 37 is arranged at a predetermined position in the double ceiling 29.

At a corner of the building 23, for example, an interior-installed air conditioner 39 is arranged.

This air conditioner 39 has a cooling coil 41. It is equipped with a heating coil 43 and a fan 45, blows warm or cold air into the double floor 27, and directs this warm or cold air from the fan unit 35 formed in the floor panel 33 to the room 25.
supply within.

Furthermore, a perimeter air conditioner 49 is arranged on the window 47 side in the room 25.

Therefore, in this embodiment, a first communication path 53 is arranged in the building 23, which communicates the double ceiling 29 with the outside and in which the first damper 51 is arranged. aisle 5
A second communication path 57 is arranged, which branches off from 3 and communicates with the upstream side of the cooling coil 41 of the air conditioner 39, and in which a second damper 55 is arranged.

Further, in this building 23, a third communication path 63 is arranged, which communicates the above-floor suction port 59 near the floor panel 33 in the room 25 with the outside, and in which a third damper 61 is arranged. A fourth communication path 67 is arranged, which branches from the third communication path 63 and communicates with the upstream side of the cooling coil 41 of the air conditioner 39, in which a fourth damper 65 is arranged.

In this embodiment, the first communication path 53 and the third communication path 63 are merged at their terminal ends.

In the underfloor air conditioning system configured as described above, for example, during cold air conditioning in the summer, the heating coil 43 is closed, the first damper 51 and the fourth damper 65 are opened, and the second damper 55 and Third damper 61
is considered closed.

As a result, relatively high-temperature cold air in the double ceiling 29 is discharged to the outside through the first communication path 53, while relatively low-temperature cold air near the floor panel 33 is discharged to the outside through the third communication path 63 and It passes through the fourth communication path 67 and is supplied to the upstream side of the cooling coil 43.

That is, during cold air conditioning, relatively low-temperature cold air near the floor panel 33 is taken into the air conditioner 39, further cooled by the cooling coil 41, and supplied into the double floor 27, while the cold air inside the double ceiling 29 is Cold air with a relatively high temperature is discharged to the outside.

On the other hand, during warm air conditioning in winter, the cooling coil 41 is closed, the first damper 51 and the fourth damper 65 are closed, and the second damper 55 and the third damper are closed, as shown in FIG.
damper 61 is opened.

As a result, relatively low-temperature warm air near the floor panel 33 is discharged to the outside through the third communication path 63, and on the other hand,
The relatively high temperature warm air in the double ceiling 29 passes through the first communication path 53 and the second communication path 57 and is supplied to the upstream side of the heating coil 43.

That is, during hot air conditioning, relatively high-temperature warm air in the double ceiling 29 is taken into the air conditioner 39, further heated by the heating coil 43, and supplied into the double floor 27, while the warm air near the floor panel 33 is Warm air with a relatively low temperature is discharged to the outside.

Therefore, in the underfloor air conditioning system configured as described above, it is possible to easily optimally control the circulating airflow according to the air conditioning conditions.

FIG. 3 shows an example in which the above-described underfloor air conditioning system is applied to a computer room 71 where cooling operation is performed throughout the year. In this example, the heating coil 43 shown in FIG. 1 is replaced with a cooling coil. 73 are arranged, and a fan unit 35 is arranged below each device 75.

This arrangement of the fan unit 35 is based on the free access type floor panel 3 to which the fan unit 35 is fixed.
This is easily possible by moving 3.

FIG. 4 shows an example of a perimeter-installed air conditioner 49 placed on the window 47 side of the room 25 shown in FIG. 1, and the reference numeral 131 in the figure indicates a casing.

A fan 133 and a heat exchanger 135 are housed within the casing 131.

The fan 133 is housed in a fan chamber 134 formed in the upper center of the casing 131.
An air outlet 137 of a fan 133 is opened on the lower surface of the fan 4 . A heat exchanger 135 such as a hot/cold water coil or a refrigerant coil is arranged below this outlet 137.

An upper suction port 139 is formed in the upper part of the casing 131, and the floor panel 3 of the casing 131
An underfloor air outlet 141 is formed at a position below 3.

In this example, an above-floor air outlet 143 is located above the floor panel 33 at the bottom of the casing 131.
is formed.

A first damper 147 is disposed in a communication path 145 between the above-floor air outlet 143 and the population side of the fan room 134. Further, a second damper 151 is arranged in a communication path 149 between the above-floor blow-off/suction port 143 and the outlet side of the heat exchanger.

Furthermore, a third damper 155 is disposed in the communication path 153 between the upper suction port 139 and the outlet side of the heat exchanger 135, and the communication path 153 between the upper suction port 139 and the fan chamber 134 population side is arranged.
7, a fourth damper 159 is arranged, respectively.

Note that in this example, the first to fourth dampers 147.1
51, 155, and 159 are electric airtight dampers each having linear characteristics. In addition, in the figure, reference numeral 161 indicates a filter, reference numeral 163 indicates an inspection plate,
Reference numeral 165 indicates a drain pan.

In such an air conditioner 49, for example, during cold air conditioning in the summer, the first damper 147 and the third damper 1
55 is open, the second damper 151 and the fourth damper 15
9 is considered closed.

As a result, the cold air in the room flows into the air conditioner 49 through the above-floor air outlet 143, as shown by the solid arrow in the figure.
It passes through the first damper 147 and is sucked into the fan 133,
The airflow blown out from the fan 133 is transferred to the heat exchanger 135
A part of the cold air is blown out to the underfloor air outlet 141, and the remaining cold air passes through the third damper 155 and is blown out into the room from the upper air inlet 139.

That is, during cold air conditioning, relatively low-temperature cold air near the floor panel 33 is taken into the air conditioner 49, further cooled by the heat exchanger 135, and then blown out to the relatively high-temperature part of the upper part of the air conditioner 49. It will be done.

On the other hand, during warm air conditioning in winter, the first damper 14
7 and third damper 155 are closed, second damper 151
And the fourth damper 159 is opened.

As a result, indoor warm air flows into the air conditioner 49 through the upper suction port 139 and passes through the fourth damper 159 to the fan 1.
The airflow sucked into the fan 133 and blown out from the fan 133 is heated by the heat exchanger 135, a part of which is blown out to the underfloor outlet 141, and the remaining warm air is sent to the second damper 133.
51 and is blown into the room from the above-floor blow-off suction port 143.

That is, during warm air conditioning, relatively high temperature warm air from the upper part of the air conditioner 49 is taken into the air conditioner 49, and the heat exchanger 1
After being further heated by the air conditioner 35, it is blown out to a relatively low-temperature area at the bottom of the air conditioner 49.

In other words, the interior installed air conditioner 3 shown in FIG.
In addition to 9, by arranging a perimeter air conditioner 49, it is possible to further equalize the indoor temperature distribution during cold air and warm air conditioning, and to perform more efficient cooling or heating. becomes possible.

〔Effect of the invention〕

As described above, the present invention includes a first communication path that communicates the double ceiling with the outside and in which the first damper is arranged, and a first communication path that branches from the first communication path to exchange heat for the air conditioner. a second communication path that communicates with the upstream side of the container and in which a second damper is arranged; and a third communication path that communicates between the above-mentioned floor suction port near the floor panel in the room and the outside and in which a third damper is arranged. A fourth communication path is formed, which branches off from the third communication path and communicates with the upstream side of the heat exchanger of the air conditioner, and in which a fourth damper is disposed. This has the advantage that optimal control of can be easily carried out.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the underfloor air conditioning system of the present invention, FIG. 2 is a longitudinal sectional view showing the underfloor air conditioning system of FIG. 1 in a warm-up operation state, and FIG. Figure 1 is a vertical cross-sectional view showing an example of applying the underfloor air conditioning system shown in Figure 1 to a computer room, Figure 4 is a vertical cross-sectional view showing the perimeter installation type air conditioner shown in Figure 1, and Figure 5 is a vertical cross-sectional view showing an example of applying the underfloor air conditioning system shown in Figure 1 to a computer room. FIG. 2 is a vertical cross-sectional view showing the underfloor air conditioning system. 27... Double floor, 29... Double ceiling, 33... Floor panel, 39... Air conditioner, 51... First damper, 53... First communication path, 55 ...Second damper, 57...Second communication path, 59...Floor suction port, 6
1...Third damper, 63...Third communication path, 65
...Fourth damper, 67...Fourth communication path. Patent applicant Takenaka Corporation Agent Patent attorney Fumi Furuya Figure 3

Claims (1)

[Claims] Hot or cold air from the air conditioner is blown into the double floor,
In the underfloor air conditioning system that supplies hot air or cold air from a blow-off grill formed on a floor panel into a room having a double ceiling, a first damper that communicates between the double ceiling and the outside and in which a first damper is arranged is provided. a second communication path that branches from the first communication path, communicates with the upstream side of the heat exchanger of the air conditioner, and in which a second damper is disposed;
a third communication path in which a third damper is arranged, which communicates between the above-mentioned floor suction port near the floor panel in the room and the outside; and a third communication path that branches from the third communication path and connects the above-mentioned air conditioner heat exchanger upstream side. An underfloor air conditioning system comprising: a fourth communication path that communicates with the air and in which a fourth damper is disposed.