JP2003307334A - Fan coil unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To intensively heat the neighborhood of a floor face of a perimeter zone in a short time to prevent a person in a room from feeling the chill near the floor face during the morning in winter. <P>SOLUTION: This fan coil unit comprises an indoor air suction port 5 for introducing the indoor air into a machine, and further comprises an air blower 11 for inducing and pressure-feeding the indoor air into the machine through the suction port, and an upper supply opening 3 for blowing out the air into the room. The fan coil unit further comprises a lower supply opening 4 for blowing out the conditioned air to a floor part, a pressure chamber 10 for distributing the conditioned air to the upper supply opening and the lower supply opening, and flow control means 8, 9 mounted between the pressure chamber and each of the supply openings, and the conditioned air is sent into the room and the floor part from the upper and lower supply openings on the basis of the control by the flow control means. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan coil unit, and more particularly to a fan coil unit capable of intensively heating near the floor of a perimeter zone for a short period of time.

[0002]

2. Description of the Related Art In general, an indoor space portion (perimeter zone) in a peripheral area of a building adjacent to a window and an outer wall is relatively greatly affected by an external heat load due to solar radiation or outside air.
On the other hand, the indoor space part (interior zone) separated from the outer peripheral area of the building is less susceptible to fluctuations in the external heat load, but on the other hand, due to the heat generated by the lighting and OA equipment and the heat generated by the human body, etc. There is a tendency for the cooling operation to be required. Under these circumstances, air conditioning equipment for each system of the perimeter zone system and interior zone system has many medium-scale
It is provided in large-scale buildings.

As an air conditioner for air conditioning the perimeter zone, a fan coil unit having a temperature adjusting means and a blower is widely put into practical use. The fan coil unit is arranged under a window or the like and includes an indoor air suction port that sucks indoor air into the machine. Generally, the temperature control means is composed of a heat medium coil such as a cold and hot water coil that circulates a heat medium such as cold and hot water, and the blower draws indoor air into the machine through the air suction port and the heat medium coil to cool or The heated cool air (during cooling operation) or warm air (during heating operation) is blown into the room from the blow-out port above the fan coil unit under the pressure of the blower. The cool airflow or the warm airflow of the fan coil unit that blows out near the window surface positively removes the air conditioning load such as the solar radiation load and the outside air load.

Further, an underfloor chamber that circulates conditioned air is formed in the underfloor space, the conditioned air of an air conditioner is blown into the underfloor chamber, and the conditioned air is blown out into the room from an outlet provided on the floor. System air conditioning equipment is known
11-241854). In such an air-conditioning system of floor blowout air-conditioning system, the air-conditioned air in the underfloor chamber is blown out from the floor outlet to the interior zone, and a ventilation unit is arranged in the perimeter zone so that the air conditioning air in the underfloor chamber is changed from the ventilation unit to the perimeter zone. An air conditioning facility configured to blow out upward is known (Japanese Patent Laid-Open No. 2001-65962 and the like).

[0005]

However, the floor temperature in the perimeter zone drops extremely in the early morning of winter, etc.
A supercooled atmosphere is formed near the floor surface. For this reason, in the perimeter zone in the morning in winter, a situation in which the cool air around the legs is felt occurs relatively frequently. For example, it has been actually confirmed in many office buildings and the like that a worker who sits down in the perimeter zone in the morning of winter feels the cold air around his feet.

In such a case, the air conditioner is operated from early morning (for example, around 6 am) so that a desired heating atmosphere is formed in the entire room during work hours (for example, around 9 am). However, such a measure is usually difficult to adopt because it may result in an increase in the running cost of the air conditioning equipment.

As another measure, a fan coil unit in the perimeter zone may be operated during work hours to actively start early heating of the perimeter zone. However, in the conventional fan coil unit, a warm air flow may be considered. Is directed to the vicinity of the window surface and the ceiling area, so that the vicinity of the floor surface of the perimeter zone cannot be heated in a short-term and intensive manner.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent indoor personnel from feeling cold air near the floor surface in the morning in winter.
It is an object of the present invention to provide a fan coil unit capable of intensively heating near the floor of the perimeter zone for a short period of time.

[0009]

In order to achieve the above object, the present invention is provided with an indoor air suction port for introducing indoor air into the machine, and draws the indoor air into the machine through the suction port. In a fan coil unit of a building perimeter zone that has a built-in blower that sends pressure and a temperature control unit that controls the temperature of indoor air, and blows the temperature controlled air from the upper outlet into the room, the temperature controlled air is applied to the floor portion. A lower air outlet for blowing out, a pressure chamber for distributing the temperature-controlled air to the upper air outlet and the lower air outlet, and a flow rate control means arranged between the pressure chamber and each air outlet, Provided is a fan coil unit, wherein the temperature-controlled air is blown from the upper and lower outlets to the room and floor under the control of a control means.

According to the above configuration of the present invention, the temperature-controlled air in the pressure chamber is blown upward from the upper outlet and is blown from the lower outlet to the floor portion. The pressure chamber is
The dynamic pressure of the temperature-controlled air is converted into static pressure, and the temperature-controlled air in the pressure chamber is properly blown out from each of the outlets by the control of the upper and lower outlets by the flow rate control means. The warm airflow blown from the lower outlet to the floor portion during the heating operation heats the floor portion of the perimeter zone in a short-term and intensive manner, and prevents indoor personnel from feeling cold air near the floor surface. The cool airflow blown from the lower outlet to the floor portion during the cooling operation cools the floor portion of the perimeter zone, and forms a cooling atmosphere in the room by the floor radiation cooling effect.

The present invention also includes an indoor air suction port for introducing indoor air into the machine, a blower for inducing the room air into the machine through the suction port, and pressure-feeding the room air. In the fan coil unit of the building perimeter zone that blows the temperature-controlled air from the upper outlet into the room, including the temperature-adjusting means, the lower-air outlet that blows the temperature-controlled air to the floor portion, the blower, A first blower for blowing the temperature-controlled air into the room through the upper air outlet, and a second blower for blowing the temperature-controlled air over the floor portion through the lower air outlet; There is provided a fan coil unit, characterized in that warm air is blown from the upper and lower outlets to a room and a floor portion.

According to the above configuration of the present invention, the temperature-controlled air is
The air is blown upward from the upper outlet under the pressure of the first blower, and is blown from the lower outlet to the floor portion under the pressure of the second blower. The blown air volume of each outlet is controlled by the air volume control or start / stop control of each blower. The warm airflow blown from the lower outlet to the floor portion during the heating operation heats the floor portion of the perimeter zone in a short-term and intensive manner, and prevents indoor personnel from feeling cold air near the floor surface. The cool airflow blown from the lower outlet to the floor portion during the cooling operation cools the floor portion of the perimeter zone, and forms a cooling atmosphere in the room by the floor radiation cooling effect.

[0013]

According to a preferred embodiment of the present invention, an underfloor chamber capable of sending temperature-controlled air from the lower outlet is formed in the perimeter zone. The warm airflow blown to the underfloor chamber (during the heating operation) flows through the flow path in the underfloor chamber to raise the floor surface temperature and the ambient temperature near the floor surface. The warm airflow, which has been cooled by the heat load of the perimeter zone, blows out into the room from the floor outlet on the floor,
After being sucked into the indoor air suction port of the fan coil unit and reheated by the temperature control means, it is recirculated from the lower outlet into the underfloor chamber. Further, the cold airflow blown to the underfloor chamber (during cooling operation) flows through the flow path in the underfloor chamber, and lowers the floor surface temperature and the ambient temperature near the floor surface.
The cold airflow heated by the heat load in the perimeter zone is blown out into the room from the floor outlet located on the floor surface, then sucked into the indoor air intake port of the fan coil unit, and recooled by the cooling function of the temperature control means. And then recirculate from the lower outlet into the underfloor chamber. The cooling of the floor surface by the underfloor ventilation of the cool air forms a comfortable cooling atmosphere in the entire room by the action of the floor radiation cooling. Preferably, the temperature-controlled air passage in the underfloor chamber has a relatively large flow passage area near the lower outlet.

In a preferred embodiment of the present invention, the fan coil unit fan comprises a centrifugal fan (centrifugal fan) and is housed in the pressure chamber. The rotating part of the blower is arranged on the back side of the cold / hot water coil that constitutes the temperature adjusting means, and rotates about a horizontal rotation axis.
As a modification, the rotating part of the blower is arranged below the cold / hot water coil that constitutes the temperature adjusting means, and rotates about the vertical rotation axis. Preferably, the flow rate control means comprises a damper device capable of opening / closing control or opening control, and the fan coil unit has a damper drive device for driving the damper to open / close, a damper control device for controlling the operation of the damper drive device, and further ,
A temperature detector for detecting the temperature of the floor portion is provided.

In another embodiment of the present invention, the first
The second fan comprises a pair of symmetrically arranged sirocco fans, and the rotation shaft of each sirocco fan is driven by a single prime mover arranged between the sirocco fans.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. 1 is a schematic sectional view and perspective view showing a first embodiment of a fan coil unit according to the present invention, and FIGS. 2 and 3 are sectional views and exploded perspective views showing the structure of the fan coil unit shown in FIG. It is a figure.

The fan coil unit 1 is arranged on the concrete floor slab S along the inner wall surface of the outer wall W. FIG. 1 shows a waist wall portion of the outer wall W, and an opening T such as a window is arranged above the waist wall portion.
A casing 2 that constitutes the casing of the fan coil unit 1.
Is designed so that its upper plate portion 2a is located at the same level as the upper surface of the window sill portion V extending toward the indoor side, and the upper outlet port 3 is disposed in the upper plate portion 2a. The casing 2 is
It has a front plate 2b, side plates 2c and a back plate 2d, and the lower end of the casing 2 reaches the floor slab S. An underfloor chamber C capable of blowing temperature-controlled air is formed between the floor slab S and the floor material F, and a lower air outlet 4 opening to the underfloor chamber C is arranged at the lower end of the front plate 2b. It The floor material F is
It is supported by the floor slab S through a large number of columns D and has a height of about 3
A temperature controlled air blow passage (underfloor chamber C) of about 0 to 60 mm is formed between the floor material F and the floor slab S.

As shown in FIG. 3, a suction port 5 for sucking indoor air is formed in the front plate 2b, and a filter 5a is attached to the suction port 5. The temperature control unit 6 including the cold / hot water coil 6 a and the drain pan 6 b is arranged inside the suction port 5. The cold / hot water supply pipe 6c and the cold / hot water return pipe 6d are connected to the cold / hot water coil 6a, and the drain pipe 6e is connected to the drape pan 6.
connected to b.

The housing back plate 6f of the temperature control unit 6 is arranged so that a plurality of vertical partition plates 7 traverse the inner region of the casing.
To the back plate 2d of the casing 2, upper and lower damper units 8 and 9 are fixed to the upper and lower ends of the vertical partition plate 7 and extend horizontally in the width direction of the casing 2.
Thus, the two pressure chambers 10 are defined by the back plate 6f, the vertical partition plate 7 and the damper units 8 and 9 in the inner region of the casing. The pressure chamber 10 is preferably airtight to withstand an internal static pressure of 10 mmAq or more, more preferably 15 mmAq or more. A lower partition plate 21 is arranged immediately below the partition plate 7, and a temperature-controlled air flow path 20 divided in the same manner as the pressure chamber 10 is provided in the pressure chamber 1.
It is formed on the lower side of 0.

As shown in FIG. 1 (A), the blower 11 is
It is arranged in the pressure chamber 10. The drive unit 12 of the blower 11 is fixed to the back plate 2d, and the suction port 13 of the blower 11 is fixed.
However, it penetrates through the back plate 6f and opens in the temperature control unit 6.
The distance t between the suction port 13 and the cold / hot water coil 6a is 40
The size is set to about 60 mm. The rotating unit 14 of the blower 11 is supported by a rotary drive shaft (not shown) of the drive unit 12, and is rotated by the drive unit 12 in the pressure chamber 10 about a horizontal rotation axis.

The upper and lower damper units 8 and 9 are respectively horizontal support shafts 8b and 9b pivotally supported by the frame bodies 8a and 9a, and the support shaft 8 respectively.
and valve bodies (damper bodies) 8c and 9c fixed to b and 9b. The valve bodies 8c and 9c extend over the entire length of the frame bodies 8a and 9a, and rotate in accordance with the rotation of the support shafts 8b and 9b. The flow passage area of each damper unit 8, 9 is equal to the valve body 8c,
It is variably controlled by controlling the rotational position of 9c.

As shown in FIG. 1B, the support shafts 8b and 9b are provided.
Ends of the slabs penetrate the frames 8a and 9a, and a pair of upper and lower swing arms 16 are fixed to the ends of the support shafts 8b and 9b. The link member 17 is pivotally attached to the tip of the swing arm 16, and the upper and lower arms 16 are linked so as to be interlocked. The end of the support shaft 8b is connected to the actuator of the damper drive motor 18, and the operation of the motor 18 causes the upper and lower support shafts 8b and 9b and the valve body 8 to move.
c and 9c rotate, and the flow passage areas of the damper units 8 and 9 change. The damper unit 8 includes a plurality of support shafts 8
Although b is provided, each support shaft 8b is synchronously rotated by an interlocking mechanism (not shown), and each support shaft 9b of the damper unit 9 is also synchronously rotated by an interlocking mechanism (not shown).

FIG. 4 is a schematic sectional view showing a method of controlling the damper units 8 and 9. The damper drive motor 18 is connected to the control device 30 via the control signal line 31, and the temperature detector 32 is connected to the control device 30 via the control signal line 33. The control device 30 is arranged, for example, in the front operation part of the fan coil unit 1, and the temperature detector 32 is arranged in the underfloor chamber C. As a modified example, as shown in FIG. 9, the damper drive motor 18 may be arranged in each of the damper units 8 and 9, and the flow passage area of each of the damper units 8 and 9 may be controlled by the controller 30. . Alternatively, the damper opening of one damper unit may be fixed, and only the opening of the other damper unit may be variably controlled by the control device 30.

FIG. 5 is a cutaway perspective view and a vertical sectional view of each floor showing the overall construction of the building equipped with the fan coil unit 1. FIG. 6 shows the structure of the underfloor chamber C provided in the perimeter zone P. FIG.

As shown in FIG. 5A, the air conditioning equipment of the building B is divided into a perimeter zone P in the outer peripheral area of each floor and an interior zone I in the inner area of each floor. The vertical sectional structure of the perimeter zone P is shown in FIG.
The fan coil unit 1 is arranged below the window T.
A cross-sectional structure of the underfloor chamber C formed between the floor material F and the floor slab S is shown in FIG. The floor material F is supported above the floor slab S by a large number of columns D, and the floor surface level FL is about 40 to 60 mm from the upper surface of the floor flab S.
The positions are set to be spaced apart from each other. In the vicinity of the lower outlet 4 of the fan coil unit 1, a pillar D1 having a relatively small size is provided.
Is used, and a relatively large column D2 is used in a region separated from the lower outlet port 4. Ventilation passage C for temperature-controlled air
1 and C2 are formed between the columns D1 and D2, and the return grill R that circulates the temperature-controlled air in the underfloor chamber C into the room is arranged along the outer wall W at the floor level FL. Prop D1,
According to the design dimension of D2, the flow passage area of the blower passage C1 is set to be relatively larger than the flow passage area of the blower passage C2, and the air flow of the lower outlet 4 is as shown by the arrow in FIG.
It smoothly disperses from the passage C1 to the passage C2 and blows out from the return grill R into the room.

Next, the fan coil unit 1 having the above structure
The operation of will be described. The fan coil unit 1 is
The fan 11 is started by a manual operation of an operation panel arranged at a predetermined position of the casing 2, and the blower 11 draws indoor air into the machine through the suction port 5 and the temperature control unit 6. Building B
Cold water of the cold / hot water heat source (during cooling operation) or hot water (during heating operation) is supplied to the cold / hot water coil 6a of the temperature control unit 6 from the cold / hot water supply pipe 6c. The cold water or the hot water circulates through the cold / hot water coil 6a, exchanges heat with the room air passing through the temperature control unit 6, and then returns to the cold / hot water heat source via the cold / hot water return pipe 6d.

The air flow adjusted by the cold / hot water coil 6a flows into the pressure chamber 10 under the pressure of the blower 11. The dynamic pressure of the temperature-controlled air flow decreases in the pressure chamber 10 and is converted into the static pressure of the air in the chamber. The air in the chamber is blown into the room or the underfloor chamber C from the outlets 3 and 4 by controlling the opening degrees of the upper and lower dampers 3 and 4. The temperature-controlled air blown into the room from the upper outlet 3 is circulated in the indoor space and then drawn into the fan coil unit 1 from the suction port 5. On the other hand, the temperature-controlled air blown from the lower outlet 4 into the underfloor chamber C is blown by the air passages C1 and C
2 is circulated and after heating the floor surface of the floor material F and the atmosphere near the floor surface, the air is blown from the return grill R into the room, and is drawn into the fan coil unit 1 from the suction port 5 like room air.

The controller 30 sets the damper drive motor 18 to the underfloor outlet position (FIG. 4A) when the detected value of the temperature detector 32 is less than or equal to the lower limit set value during the heating operation.
On the other hand, when the detected value of the temperature detector 32 exceeds a predetermined set value, the damper drive motor 18 is moved to the upper blowing position (see FIG. 4).
(B)). At the underfloor blowing position, the upper damper unit 8 is fully closed and the lower damper unit 9 is fully open. On the other hand, at the upper blowing position, the upper damper unit 8 is fully opened and the lower damper unit 9 is fully closed.
Therefore, when a cooling atmosphere is generated near the floor surface in the early morning of winter or the like, the temperature detector 32 detects a temperature equal to or lower than the set value, and the damper drive motor 18 fully closes the upper damper unit 8 and lower damper unit. 9 is fully opened. As a result, a large amount of temperature-controlled air (warm air) is blown into the underfloor chamber C, the floor surface temperature rises, and the cooling atmosphere near the floor surface is eliminated early. According to such a fan coil unit 1, since the fan coil unit 1 can be operated during work hours and a heating atmosphere can be formed in the vicinity of the floor early, the indoor personnel can be close to the floor during the winter morning. It is possible to prevent the person from feeling the cold air.

When the detected value of the temperature detector 32 is equal to or higher than the upper limit set value during the cooling operation, the control device 30 sets the damper drive motor 18 to the underfloor blowing position (FIG. 4 (A)),
On the other hand, when the detected value of the temperature detector 32 is lower than the predetermined set value, the damper drive motor 18 is moved to the upper blowing position (see FIG. 4).
(B)). At the underfloor blowing position, the upper damper unit 8 is fully closed and the lower damper unit 9 is fully open. On the other hand, at the upper blowing position, the upper damper unit 8 is fully opened and the lower damper unit 9 is fully closed.
Therefore, when the floor temperature rises in the summer, the temperature detector 32
When the temperature above the set value is detected, the damper drive motor 18
The upper damper unit 8 is fully closed and the lower damper unit 9 is fully opened. As a result, a large amount of temperature-controlled air (cool air) is blown to the underfloor chamber C, the floor surface temperature drops, and a comfortable cooling atmosphere by floor radiation cooling is formed in the room.

FIG. 7 is a schematic sectional view and a perspective view showing a second embodiment of the fan coil unit according to the present invention. In the fan coil unit 1 of this example, the blower 11 is arranged below the temperature control unit 6, and the drive unit 1 of the blower 11 is arranged.
The two and the rotary drive axis are vertically oriented. According to such a configuration, the suction port 13 of the blower 11 and the suction port 5 of the fan coil unit 1 are not arranged in series, and the directions of both are intersecting (orthogonal), so that the room accompanying the operation of the blower 11 Noise can be prevented from rising.

FIG. 8 is a schematic sectional view and a perspective view showing a third embodiment of the fan coil unit according to the present invention. In the fan coil unit 1 of this example, the blower 11 is composed of a pair of sirocco fans 11a and 11b. The fans 11a and 11b have a symmetrical structure and are arranged symmetrically.
The drive unit 12 having a prime mover is arranged between the rotating units 14a and 14b of the fans 11a and 11b. The rotary drive shaft of the drive unit 12 rotates the rotary units 14a and 14b on both sides simultaneously and in the same direction. The air inlets of the air ducts 15a and 15b are connected to the air outlets of the fans 11a and 11b. The blower duct 15a of the fan 11a expands in the blowing direction and is connected to the lower outlet 4, and the blower duct 15b of the fan 11b expands in the blowing direction and is connected to the upper blower outlet 3. According to the fan coil unit 1 having such a configuration, the blower 11 having a relatively high static pressure performance can be adopted.

The operations of the fans 11a and 11b are controlled by a controller (not shown). Desirably, the control device includes a fan rotation speed control unit that variably controls the air flow rates of the fans 11a and 11b according to the air conditioning load.

Similar to the above-described embodiment, the fan coil unit 1 draws indoor air into the machine under the pressure of the blower 11, and the temperature control unit 6 heats the indoor air (winter season) or cools it (summer season). Temperature-controlled air is blown into the upper and lower outlets 3, 4
Is blown into the room and the underfloor chamber C.

Although the preferred embodiments of the present invention have been described above in detail, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention described in the claims. It goes without saying that modifications and variations are possible, and such changes and modifications are also included in the scope of the present invention.

For example, as the air conditioning equipment for the interior zone I, like the perimeter zone P, it is desirable to adopt a floor blowing type air conditioning equipment using an underfloor chamber.
Any air conditioning system may be adopted as the air conditioning system for the interior zone I.

In the configuration of the fan coil unit 1 of the present invention, cool air (during cooling operation) or warm air (during heating operation) is supplied from the upper and lower outlets 3 and 4 to the room or underfloor chamber C.
Alternatively, the damper at one of the outlets may be fixed at a predetermined opening and the opening of the damper at the other outlet may be variably controlled. Further, in the first and second embodiments, the damper units 8 and 9 and the control device 30 may be configured so that the air flow rates of the upper and lower outlets 3 and 4 are set to arbitrary air rates.

In each of the above embodiments, the lower outlet 4
Is arranged so as to open into the underfloor chamber C, but the lower outlet 4 is opened so as to open near the floor surface on the indoor floor.
It is also possible to arrange.

[0038]

As described above, according to the above configuration of the present invention, the fan coil unit is provided with the lower air outlet capable of blowing the warm air flow to the floor portion, so that the vicinity of the floor surface of the perimeter zone is concentrated in a short period of time. It is possible to prevent the indoor personnel from feeling the cold air near the floor surface in the morning in the winter by heating the indoor space.

[Brief description of drawings]

FIG. 1 is a schematic sectional view and a perspective view showing a first embodiment of a fan coil unit according to the present invention.

FIG. 2 is a cross-sectional view showing the structure of the fan coil unit shown in FIG.

FIG. 3 is an exploded perspective view showing the structure of the fan coil unit shown in FIG. 3A is an exploded perspective view of the entire fan coil unit, and FIG. 3B is an exploded perspective view of the temperature adjustment unit.

FIG. 4 is a schematic cross-sectional view showing a control method of the damper unit shown in FIGS. 1 to 3.

5 is a broken perspective view and a vertical cross-sectional view of each floor showing the overall structure of a building including the fan coil unit shown in FIGS. 1 to 4. FIG.

FIG. 6 is a cross-sectional view showing a structure of an underfloor chamber provided in a perimeter zone of a building.

FIG. 7 is a schematic sectional view and a perspective view showing a second embodiment of a fan coil unit according to the present invention.

FIG. 8 is a schematic sectional view and a perspective view showing a third embodiment of the fan coil unit according to the present invention.

FIG. 9 is a schematic cross-sectional view showing a modified example of the damper unit control method.

[Explanation of symbols]

1 Fan coil unit 2 casing 3 Upper outlet 4 Lower outlet 6 Temperature control unit 7 Vertical divider 8 Upper damper unit 9 Lower damper unit 10 pressure chamber 11 blower 12 Drive 13 Suction port 14 Rotating part 30 Control device 32 Temperature detector

Claims (7)

[Claims] 1. An indoor air suction port for introducing indoor air into the machine, a blower for inducing the room air into the machine through the suction port and pressure-feeding the room air, and a temperature control means for controlling the temperature of the room air. In a fan coil unit in a building perimeter zone that has a built-in and blows temperature-controlled air into the room from an upper air outlet, a lower air outlet that blows the temperature-controlled air to the floor portion, and the upper air outlet and the lower air outlet. A pressure chamber for distributing the temperature-adjusted air, and a flow rate control means disposed between the pressure chamber and each of the air outlets, and the temperature-controlled air is controlled under the control of the flow rate control means. A fan coil unit characterized in that air is blown into the room and the floor from the air outlet. 2. An indoor air suction port for introducing indoor air into the machine, a blower for drawing the indoor air into the machine through the suction port and pressure-feeding the room air, and a temperature control means for controlling the temperature of the indoor air. In the fan coil unit of the building perimeter zone that blows temperature-controlled air into the room from the upper air outlet, the lower air outlet that blows the temperature-controlled air to the floor portion is provided, and the blower is the upper air outlet. It includes a first blower that blows the temperature-controlled air into the room through an outlet, and a second blower that blows the temperature-controlled air through the lower outlet to the floor portion, and the temperature-controlled air is blown by the blower. A fan coil unit characterized in that air is blown from the upper and lower outlets to a room and a floor. 3. The underfloor chamber capable of sending temperature-controlled air from the lower outlet is formed in the perimeter zone, and the lower outlet opens in the underfloor chamber. The fan coil unit described in. 4. The fan coil unit according to claim 3, wherein a floor outlet that blows out the temperature-controlled air circulated in the underfloor chamber into the room is provided on the floor of the perimeter zone. 5. The temperature-controlled air passage in the underfloor chamber comprises:
The fan coil unit according to claim 3 or 4, wherein the fan coil unit has a relatively large flow passage area in the vicinity of the lower outlet. 6. The flow rate control means comprises a damper device capable of opening / closing control or opening control, a damper drive device for opening / closing the damper, a damper control device for controlling the operation of the damper drive device, and further a floor portion. The fan coil unit according to claim 1, further comprising a temperature detector that detects the temperature of the fan coil unit. 7. The first and second blowers are composed of a pair of sirocco fans symmetrically arranged, and a rotation shaft of each sirocco fan is driven by a single prime mover arranged between the sirocco fans. The fan coil unit according to claim 2, wherein.