JPH0318101B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an underfloor air conditioning system.

[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 is used to provide air conditioning.

FIG. 7 shows a conventional underfloor air conditioning system, in which the air conditioner 11
The warm or cool air passes through a space 15 formed at the lower part of the floor panel 13 and is blown out into the room 19 from an underfloor air conditioning outlet 17 formed in the floor panel 13, whereby the room 19 is air-conditioned.

[Problem that the invention seeks to solve]

However, in such a conventional underfloor air conditioning system, the air conditioner 11 is
The airflow sucked in from the upper part of the casing 21 of 1 is blown out from the lower part of the casing 21 toward the space 15 below the floor panel 13, and when the air conditioning conditions are completely different, such as warm air conditioning in winter and cold air conditioning in summer, However, there was a problem in that it was not possible to appropriately control the circulating airflow, and there was a limit to the improvement of the indoor environment.

[Purpose of the invention]

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention 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]

An underfloor air conditioning system according to the present invention is an underfloor air conditioning system that blows hot or cold air from an air conditioning unit into a double floor, and supplies the hot or cold air indoors from a fan unit disposed on a floor panel. The air conditioning unit is configured to suck indoor cold air from the bottom of the casing and blow out cold air from the top of the casing during cooling, and to suck indoor warm air from the top of the casing and blow out warm air from the bottom of the casing during heating. Furthermore, the amount of air supplied to the room by the fan unit is made variable.

[Action of the invention]

In the present invention, for example, during cooling in the summer, the air conditioning unit sucks indoor cold air from the bottom of the casing and blows out cold air from the top of the casing, while during heating, it sucks indoor warm air from the top of the casing. Warm air is blown out from the bottom of the casing.

Furthermore, in the present invention, the amount of air supplied to the room by the fan unit is variable.

That is, in the present invention, during cold air conditioning, relatively low-temperature cold air near the floor panel is taken into the air conditioning unit, further cooled by the heat exchanger, and blown out toward the relatively high-temperature part of the ceiling. The Rukoto.

Additionally, during hot air conditioning, relatively high-temperature warm air near the ceiling is drawn into the air conditioning unit, further heated by the heat exchanger, and then blown out toward the relatively low-temperature area near the floor panel. Become.

In addition, in the present invention, since the amount of air supplied to the room by the fan unit is made variable, by controlling the amount of air from the fan unit according to the amount of cool air or warm air blown into the room from the air conditioning unit, the perimeter area and interior It becomes possible to easily perform control according to the load on the part.

[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.
3 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 has a floor slab 31 and a floor panel 3.
3, and the floor panel 33 is of a free access type.

A fan unit 35 is arranged on the floor panel 33 at a required position.

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 air conditioner 39 is arranged.

This air conditioner 39 is equipped with a cooling coil, a heating coil, and a fan (not shown), and blows hot or cold air into the double floor 27, and sends the hot or cold air from the fan unit 35 formed in the floor panel 33 to the room 25. supply within.

Further, on the window 47 side in the room 25, an air conditioning unit 49 consisting of a wall-through type air conditioner is arranged.

Inside the building 23, there is a double ceiling 29 and a room 25.
A return air duct 51 is disposed that communicates the upper part of the air conditioner with the outside, and a branch duct 53 that branches off from the return air duct 51 and communicates with the air conditioner 39 is disposed.

FIGS. 2 and 3 show a fan unit 35 disposed on a free access floor panel 33.
In this fan unit 35, four air outlets 55 are arranged on the side of the room 25 of the air outlet grill 54, and a fan 57 is arranged below the air outlet grill 54.

As will be described later, the air volume of this fan 57 can be automatically controlled in accordance with the amount of air blown from the air conditioning unit 49, and can be set to three levels, for example, strong, medium, and weak, depending on the resident's preference. Or it is said to be continuously variable.

FIG. 4 shows the details of the air conditioning unit 49 disposed on the window 47 side and its vicinity. This air conditioning unit 49 is composed of an indoor unit section 59 and an outdoor unit section 61.
9 includes heat exchangers 63, 65 and a fan 6.
The outdoor unit 61 houses a compressor 71.

In addition, sprinkler 7 is installed in the double ceiling 29.
3. A lighting fixture 75 and a sensor 77 are arranged, and the lighting fixture 75 is formed with a return air port.

In this embodiment, the air conditioning unit 4
9 is configured to suck indoor cold air from the lower part of the casing 79 and blow out cold air from the upper part of the casing 79 during cooling.

On the other hand, during heating, as shown in FIG. 5, the warm air in the room is sucked in from the upper part of the casing 79 and the warm air is blown out from the lower part of the casing 79.

Further, in this air conditioning unit 49, the cold air blown out from the upper part of the casing 79 during cooling and the warm air blown out from the lower part of the casing 79 during heating are variable depending on the load on the perimeter portion 81.

That is, in the underfloor air conditioning system configured as described above, for example, during cooling in the summer, the air conditioning unit 49
The cold air from the room is sucked in from the bottom of the casing 7.
Cold air was blown out from the top of 9, while
During heating, indoor warm air is sucked in from the upper part of the casing 79 and warm air is blown out from the lower part of the casing 79.

Therefore, in the present invention, during cold air conditioning, relatively low-temperature cold air near the floor panel 33 is taken into the air conditioning unit 49, and the heat exchangers 63, 6
5, a part of which passes through the perimeter portion 81 and is blown out toward a relatively high temperature portion of the ceiling.

Also, during warm air conditioning, as shown in Figure 5,
The relatively high temperature warm air near the ceiling passes through the perimeter section 81, is taken into the air conditioning unit 49, is further heated by the heat exchangers 63 and 65, and is directed to the relatively low temperature section near the floor panel 33. It will be blown out.

In the present invention, since the amount of air supplied into the room by the fan unit 35 is made variable, the amount of cool air or warm air blown into the room from the air conditioning unit 49 is controlled according to the load on the perimeter portion 81, and the amount of air supplied to the room by the fan unit 35 is controlled. By controlling the air volume of the unit 35, it becomes possible to easily perform control according to the loads on the perimeter portion 81 and the interior portion.

That is, for example, in summer, when the load on the perimeter portion 81 becomes extremely large due to irradiation with sunlight, 50% of the air volume supplied into the room 25 is supplied from the upper part of the casing 79 of the air conditioning unit 49. Meanwhile, the remaining 50% is supplied from the fan unit 35.

Then, at night when the sun goes down and the load on the pellet meter section 81 becomes relatively small, from the top of the casing 79 of the air conditioning unit 49,
For example, 20% of the air volume supplied to room 25 is supplied, while the remaining 80% is supplied from fan unit 35.
% is supplied.

Furthermore, in winter, at night, the load on the perimeter portion 81 becomes very large, so that, for example, 50% of the air volume supplied into the room 25 is supplied from the upper part of the casing 79 of the air conditioning unit 49.
On the other hand, the remaining 50% is supplied from the fan unit 35.

When the sun is shining in the daytime, the load on the perimeter portion 81 is relatively small, so that from the upper part of the casing 79 of the air conditioning unit 49, for example, 20% of the air volume supplied into the room 25 is
%, while the remaining 80% is supplied from the fan unit 35.

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. 6 shows another example of the air conditioning unit 49 arranged on the window 47 side of the room 25 shown in FIG. shows the 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 at the upper center of the casing 131, and an air outlet 137 of the fan 133 is opened at the bottom surface of the fan chamber 134. A heat exchanger 135 such as a cold/hot water coil or a refrigerant coil is disposed below this outlet 137.

In the upper part of the casing 131, an upper suction port 13 is provided.
9 is formed, and an underfloor air outlet 141 is formed at a position below the floor panel 33 of the casing 131.

In this example, an above-floor air outlet 143 is formed at a position above the floor panel 33 in the lower part of the casing 131.

A first damper 147 is provided in the communication passage 145 between the above-floor blow-off suction port 143 and the entrance side of the fan chamber 134.
is located. In addition, the above-floor air outlet 143
In the communication path 149 between the heat exchanger and the outlet side of the heat exchanger, a second
A damper 151 is arranged.

Furthermore, a third damper 155 is provided in the communication path 153 between the upper suction port 139 and the outlet side of the heat exchanger 135.
are arranged, and the upper suction port 139 and the fan chamber 134
A fourth damper 15 is provided in the communication path 157 with the inlet side.
9 are arranged respectively.

Note that in this example, the first to fourth dampers 1
47, 151, 155, and 159 are electric airtight dampers each having linear characteristics. Further, in the figure, reference numeral 161 indicates a filter, reference numeral 163 indicates an inspection plate, and reference numeral 165 indicates a drain pan.

In such an air conditioning unit 49, for example, during cold air conditioning in summer, the first damper 147
and the third damper 155 is opened, and the second damper 1
51 and the fourth damper 159 are closed.

As a result, the cool air in the room flows into the air conditioning unit 49 from the above-floor air outlet 143, as shown by the solid arrow in the figure, passes through the first damper 147, is sucked into the fan 133, and is blown out from the fan 133. The cooled air is cooled by the heat exchanger 135, a portion of which is blown out to the underfloor air outlet 141, and the remaining cold air is blown out into the room from the upper suction port 139 through the third damper 155.

That is, during cold air conditioning, the floor panel 33
Nearby relatively low temperature cold air flows through the air conditioning unit 49.
After being taken into the air conditioner and further cooled by the heat exchanger 135, it is blown out to the relatively high temperature area above the air conditioning unit 49.

On the other hand, during warm air conditioning in winter, the first damper 147 and the third damper 155 are closed, and the second damper 155 is closed.
damper 151 and fourth damper 159 are opened.

As a result, the warm air inside the room is transferred to the upper suction port 139.
The airflow flows into the air conditioning unit 49 through the fourth damper 159, is sucked into the fan 133, and is blown out from the fan 133.
A part of the warm air is blown out to the underfloor air outlet 141, and the remaining warm air passes through the second damper 151 and is blown into the room from the above-floor air outlet 143.

That is, during warm air conditioning, the air conditioning unit 49
The relatively high temperature warm air in the upper part is taken into the air conditioner 49, further heated by the heat exchanger 135, and then blown out to the lower part of the air conditioner 49 where the temperature is relatively low.

〔Effect of the invention〕

As described above, in the present invention, the air conditioning unit is configured to suck indoor cold air from the lower part of the casing and blow out cold air from the upper part of the casing during cooling, and to blow indoor warm air from the upper part of the casing during heating. It is constructed so that warm air is blown out from the bottom of the suction casing, and the amount of air supplied to the room by the fan unit is variable, so it has the advantage of being able to easily control the circulating airflow optimally depending on the air conditioning conditions. be.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the underfloor air conditioning system of the present invention, Fig. 2 is a sectional view showing the fan unit of Fig. 1, Fig. 3 is a top view of Fig. 2, and Fig. 4 5 is a longitudinal sectional view showing the air conditioning unit and its vicinity, FIG. 5 is a longitudinal sectional view showing the air conditioning unit in FIG. 4 in a warm-up operation state, and FIG. 6 is a longitudinal sectional view showing another example of the air conditioning unit. , FIG. 7 is a vertical sectional view showing a conventional underfloor air conditioning system. 27...double floor, 29...double ceiling, 33...
Floor panel, 39... air conditioner, 49... air conditioning unit.

Claims (1)

[Scope of Claims] 1. An underfloor air conditioning system that blows warm or cold air from an air conditioning unit into a double floor, and supplies the hot or cold air into the room from a fan unit disposed on a floor panel. During cooling, the indoor cool air is sucked in from the bottom of the casing and cool air is blown out from the top of the casing, and during heating, the indoor warm air is sucked in from the top of the casing and warm air is blown out from the bottom of the casing. An underfloor air conditioning system further characterized in that the amount of air supplied to the room by the fan unit is variable. 2. The underfloor air conditioning system according to claim 1, wherein the air conditioning unit is a wall-through type air conditioner. 3. The underfloor air conditioning system according to claim 1, wherein the air conditioning unit is a fan coil unit.