JPH0321812B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an indoor air-conditioning system equipped with a supply chamber in the ceiling of an office room or the like.

[Prior Art] Conventionally, as an indoor cooling system having a supply chamber in the ceiling, as shown in FIG. 7, (1) as shown in FIG. A suction port 16 provided at the lower part of the side wall is connected by an intake duct 18 to an air intake port of an air conditioner 17 equipped with a heating section, a cooling section, and a blower fan. indoor cooling equipment in which an air supply port and a ceiling supply chamber 2 are connected by an air supply duct 19;
(2) As shown in FIG. 8, a plurality of air outlets 4 each having a variable air volume fan 20 are provided in the ceiling 3 of the room 1, and a suction port 16 and an air conditioner 17 are provided in the lower part of the side wall.
An indoor cooling system is known in which the air inlet of the air conditioner 17 is connected to the ceiling supply chamber 2 by an air intake duct 18, and the air inlet of the air conditioner 17 is connected to the ceiling supply chamber 2 by an air duct 19.

By changing the amount of air blown by the air volume variable device 15 and the air volume variable fan 20,
is regulating the temperature.

[Problem that the invention seeks to solve]

However, in the case of the above-mentioned conventional indoor heating and cooling equipment, the cold air sent from the air conditioner 17 is blown into the room 1 through the ceiling supply chamber 2 and the air outlet 4, so in summer, the room temperature is much lower than the required room temperature. Low-temperature cold air cannot be sent from the air conditioner 17 to the ceiling supply chamber 2, so the amount of air blown from the air conditioner 17 to the ceiling supply chamber 2 increases, and the blower in the air conditioner becomes large in capacity and expensive. At the same time, the operating power cost increases, and the cross section of the air duct becomes larger, resulting in higher cost and the space occupied by the air duct. Another problem is that indoor airborne dust cannot be effectively removed.

[Purpose and structure of the invention]

An object of the present invention is to provide an indoor cooling system having a ceiling supply chamber that advantageously solves the above-mentioned problems. In an indoor cooling system in which a blower outlet 4 is provided in the ceiling 3 and a cold air supply chamber 6 is connected to a supply duct 5 that opens into the ceiling supply chamber 2, a blower 8 is installed on the discharge side of the filter device 7. Clean return air chamber 9 connected via
and an air mixing and supplying device 10 connected to the cold air supplying chamber 6 and the clean return air chamber 9.
The inlet of the filter device 7 is connected to the air outlet of the air conditioner through the air duct 12, and the inlet of the filter device 7 and the inlet 13 provided in the room 1 are connected to the air intake duct 14.
In an indoor cooling facility with a ceiling supply chamber, characterized in that it is connected via a ceiling supply chamber.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 6 show an embodiment of the present invention, in which an inlet 22 is provided at one end of a mixing supply chamber 21, and an outlet of the mixing supply chamber 21 is connected to a cold air supply chamber 6. , and mixing supply chamber 2
A variable air volume device (VAV) 23 consisting of a pair of dampers adjusted by an electric motor with a reduction gear is provided on the inlet side of the mixing supply chamber 21, and a damper adjusted by an electric motor with a reduction gear is installed on the outlet side of the mixing supply chamber 21. A constant air volume device (CAV) 25 with a fully closing function is provided, and a clean return air inlet 26 is provided on the side of the mixing supply chamber 21 between the variable air volume device 23 and the constant air volume device 25. A backflow prevention damper 27 is provided at the clean return air inlet 26, and a backflow prevention damper 27 is provided at the intermediate portion between the variable air volume device 23 and constant air volume device 25 provided in the mixing supply chamber 21 and the mixing supply chamber 21. Clean return air inlet 2 with prevention damper 27
6 constitutes an air mixing supply device 10.

One end of the plurality of supply ducts 5 is connected to the cold air supply chamber 6, and a side portion of the cold air supply chamber 6 is connected to one end of the plurality of supply ducts 5.
A filter device 7 with a DOP of 80% is fixed, and a clean return air chamber 9 is attached to the side of the mixing supply chamber 21.
Further, the discharge side of the filter device 7 and the inlet of the clean return air chamber 9 are connected by a blower 8 with a constant air volume. A damper 29 adjusted by an electric motor is provided, and a cold air supply chamber 6 is connected to the supply duct 5 and the air mixing supply device 10, and a clean return air chamber 9 is connected to the filter device 7 via a blower 8. , and a cold air supply unit 11.

Cold air supply unit 11 configured in this way
is arranged in the upper ceiling supply chamber 2 of the room 1 and fixed on the ceiling 3, and one of the plurality of supply ducts 5 is arranged in the upper ceiling supply chamber 2 of one room. The other supply duct 5 is opened into the upper ceiling supply chamber 2 of the adjacent room, and the air supply port of the air conditioner 17 installed outside the room and the inlet 22 of the air mixing supply device 10 are connected to each other. The air inlet 13 provided in the wall of the room 1 and the inlet 32 of the filter device 7 are connected through the air duct 12, and the air inlet 32 of the filter device 7 is connected through the air intake duct 14, and the outlet 28 of the clean return air chamber 9 and The intake port of the air conditioner 17 is the intake duct 30
connected via.

A large number of air outlets 4 are provided on the ceiling 3 at intervals in the front-back and left-right directions, and a manual air volume adjustment device 31 having a blade plate for adjusting the opening area is attached to the upper part of each air outlet 4. The opening area of the manual air volume adjustment device 31 can be manually adjusted from inside the room 1.

When using the indoor cooling system configured as described above to cool the room in the summer, cold air of approximately 12°C is sent from the air conditioner to the variable air volume device 23 via the air duct 12, and the The variable air volume device 23 adjusts the volume of cold air to provide the optimum room temperature, and the volume-adjusted cold air and the clean return air from the clean return air chamber 9 (for example, at a temperature of 26°C) are as follows:
By mixing in the air mixing supply device 10, the temperature is adjusted to a temperature that does not cause condensation, for example, about 15°C.

Next, the temperature-adjusted cold air is blown out from the supply duct 5 to the ceiling supply chamber 2 through the cold air supply chamber 6 while being adjusted to a constant air volume by the constant air volume device 25. is a large number of air outlets 4 installed in the ceiling 3
The air is blown downward into the room 1 through the air, and the room 1 is cooled almost uniformly. Furthermore, since the cold air blown into the ceiling supply chamber 2 cools the components that make up the ceiling 3, cold radiation is generated from the ceiling surface of the room 1, which makes the indoor temperature distribution even more uniform and provides comfortable cooling. The environment is secured.

Furthermore, the air in the room 1 is sucked in through the suction port 13 on the wall, and then returned to the filter device 7 through the intake duct 14.
The indoor airborne dust in the return air is removed by the air filter, and then the clean return air after the dust removal is sent to the clean return air chamber 9 by the blower 8 with a constant air volume, and from the clean return air chamber 9, a part of the clean return air is removed. While the air is drawn into the air conditioner through the intake duct 30, the remaining amount of clean return air (the amount obtained by subtracting the amount of air sucked into the intake duct 30 from the amount of air blown by the blower 8) is removed from the clean return air chamber 9. The amount of cold air supplied to the air mixing supply device 10 and sent from the air conditioner to the air supply duct 12 and the amount of clean return air sent from the air intake duct 30 to the air conditioner are set equal, and air balance is maintained.

When the room temperature is raised at the start of indoor use in winter, warm air of, for example, 35° C. is sent from the air conditioner to the air mixing supply device 10, and low-temperature clean return air is mixed from inside the clean return air chamber 9. The warm air from the air conditioner and the clean return air from the clean return air chamber 9 are mixed in the air mixing supply device 10, and the warm air obtained by the mixing is sent to the supply duct. 5 to the ceiling supply chamber 2, and then blown into the room from the ceiling supply chamber 2 through the outlet 4.

When the temperature in the room 1 becomes higher than a predetermined temperature, the air conditioner sends cold air and switches to cooling operation as described above.

Note that when cooling the room, the indoor temperature is adjusted by controlling the temperature of the cold air sent from the air conditioner.

In the case of the above embodiment, the manual air volume adjustment device 31
Since the amount of air blown from each outlet 4 can be adjusted separately, the amount of air can be set to an appropriate amount depending on the location in the room.

When carrying out this invention, a downwardly opening suction port may be attached to the ceiling 3, and the air intake duct 14 may be connected to the suction port. Further, as the manual air volume adjustment device 31, any known type may be adopted.

〔Effect of the invention〕

According to this invention, in the summer, the cold air supplied from the air conditioner through the air supply duct 12 and the clean return air from the room at a higher temperature are mixed by the air mixing supply device 10 and the temperature is adjusted. Afterwards, the temperature-adjusted cold air is supplied into the ceiling supply chamber 2, so the temperature of the cold air supplied from the air conditioner to the air mixing supply device 10 can be made relatively low. Since the amount of cold air generated can be reduced, the blower in the air conditioner can be made small and inexpensive, and the operating power cost of the blower can be reduced, and the cross section of the air duct 12 can be made small to reduce costs. In addition, the space occupied by the air supply duct 12 can be reduced, and the indoor 1
After the indoor airborne dust in the return air is removed by the filter device 7 to produce clean return air, a part of the clean return air is mixed with the cold air supplied into the ceiling supply chamber 2.
Effects such as improving the cleanliness of indoor air can be obtained.

[Brief explanation of the drawing]

1 to 6 show one embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view of an indoor cooling equipment having a ceiling supply chamber, and FIG. 2 is a part of FIG. 1. 3 is a cross-sectional plan view of the cold air supply unit, FIG. 4 is a sectional view taken along line A-A in FIG. 3, and FIG. 5 is a cross-sectional view taken along line B-- in FIG. 3.
The sectional view taken along the line B and FIG. 6 are schematic longitudinal sectional front views of an indoor cooling equipment having a ceiling supply chamber. FIGS. 7 and 8 are schematic longitudinal sectional front views showing a conventional indoor cooling equipment having a ceiling supply chamber. In the figure, 1 is the room, 2 is the ceiling supply chamber, 3 is the ceiling, 4 is the air outlet, 5 is the supply duct, 6
1 is a cold air supply chamber, 7 is a filter device, 8 is a blower, 9 is a clean return air chamber, 10 is an air mixing supply device, 11 is a cold air supply unit, 12 is an air supply duct, 13 is an inlet, 14 is an intake duct, 21 is a mixing supply chamber, 22 is an inlet, 23 is a variable air volume device,
25 is a constant air volume device, 26 is a clean return air inlet, 27 is a backflow prevention damper, 28 is an outlet, 29
is a damper, and 30 is an intake duct.

Claims (1)

[Claims] 1 In an indoor cooling system in which a ceiling supply chamber 2 is provided in the upper part of the room 1 and an air outlet 4 is provided in the ceiling 3, the ceiling supply chamber 2
A cold air supply chamber 6 connected to a supply duct 5 opening to
, a clean return air chamber 9 connected to the discharge side of the filter device 7 via a blower 8, and an air mixing supply device 10 connected to the cold air supply chamber 6 and the clean return air chamber 9. A supply unit 11 is installed in the ceiling supply chamber 2, the inlet of the air mixing and supply device 10 is connected to the air outlet of the air conditioner via the air duct 12, and the inlet of the filter device 7 and the room 1 are connected to each other. An indoor cooling system having a ceiling supply chamber, which is connected to a provided suction port 13 via an air intake duct 14.