JP3228282B2 - Fan coil unit - Google Patents

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.

[0002]

2. Description of the Related Art When a plurality of air conditioning zones are individually air-conditioned by one fan coil unit, the fan coil unit and the plurality of air conditioning zones are connected by a duct, and a variable air volume (VAV) unit is provided at an outlet of each air conditioning zone. There is a system for providing air conditioning.

[0003]

However, in this case, when controlling the air flow, there is a problem that the control device becomes complicated and the cost increases. In addition, since the conventional fan coil unit has a small number of fans (for example, two), if a large number of fans are provided, for example, even if one of the fans fails, the fan coil unit is inconvenient and inconvenient and lacks safety. There is also. Therefore,
An object of the present invention is to provide a fan coil unit that solves these problems.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a casing, a heat exchange chamber provided with a heat exchange coil in the casing, and a communication with the heat exchange chamber. A blower chamber is formed adjacently, and an intake port communicating with the blower chamber and an air supply port communicating with the heat exchange chamber are formed in the casing, with a DC motor having a drive circuit capable of changing the rotation speed. A large number of blowers are independently provided in a plurality of stages and a plurality of rows in the blower room. Also, a large number of blowers are independently provided in a plurality of stages and a plurality of rows on the heat exchange room adjacent surface of the blower room, and the space formed between the heat exchange room adjacent surface and the heat exchange coil has a narrow side near the intake port. One or both of the heat exchange chamber adjacent surface and the heat exchange coil are inclined so that the heat exchange chamber is adjacent to the heat exchange chamber. Further, an air supply port is formed on the lower surface of the casing. A chamber having an outlet chamber and a suction chamber,
In this chamber, a plurality of air inlets communicating with the outlet chamber and a plurality of air inlets communicating with the suction chamber are provided, and the air outlet of the chamber and the air inlet of the casing are connected to the chamber. The suction chamber and the intake port of the casing are connected to each other via a duct or directly, and a drive damper is provided at each of the supply ports. A blow-out / suction unit integrating the blow-out section and the suction section; connecting the air-supply connection port of the blow-out / suction unit via a duct to the air supply connection port of the chamber; The air intake connection port of the blow-out / suction unit is connected through a duct. In addition, an air outlet and a suction port are provided, and the air outlet is connected to the air supply connection port of the chamber via a duct, and the suction port is connected to the air intake connection port of the chamber via the duct. A chamber having a blow-off chamber and a suction chamber, a plurality of air supply ports communicating with the blow-off chamber, a plurality of intake ports communicating with the suction chamber,
The air outlet of the chamber and the air inlet of the casing, the suction chamber of the chamber and the air inlet of the casing are connected to each other directly or through a duct, and the air outlet and the air inlet are integrated. A suction unit, and a supply connection port of the blow-out / suction unit is connected to a supply connection port of the chamber via a duct; and an intake connection port of the blow-out / suction unit is connected to a suction connection port of the chamber. A drive damper is provided at the air supply connection port of the blow-out / suction unit, which is connected via a duct. A chamber having a blow-off chamber and a suction chamber, wherein the chamber is provided with a plurality of air supply connection ports communicating with the blow-off chamber, and a plurality of intake connection ports communicating with the suction chamber; The air supply port of the casing and the air inlet of the casing are connected to the suction chamber of the chamber and the air inlet of the casing through a duct or directly, respectively, and the air supply port of the chamber is provided with an air outlet and a suction port. The air outlet is connected via a duct, the suction port of the chamber is connected to the air inlet via a duct, and a drive damper is provided at the air outlet. In addition, an outlet and a suction port are provided, the outlet is connected to a supply port of the chamber via a duct, the suction port is connected to a suction port of the chamber via a duct, and the air outlet is connected to the chamber. A drive damper is provided. Further, a ventilation unit is provided, and an appropriate intake connection port of the chamber is an outside air connection port and an exhaust connection port, and the ventilation unit is connected to these through a duct. Further, a guide plate for guiding outside air from the outside air connection port to the suction port of the casing is provided in the suction chamber of the chamber. In addition, the exterior plates of the chamber and the blow-out / suction unit are glass wool boards. Also,
An alarm means for reporting the failure of each blower is separately provided, and is an alarm means for reporting the failure of the blower by detecting the rotation of the DC motor, or an alarm means for reporting the stop of the blower by detecting the air volume of the blower. The heat transfer tube of the heat exchange coil is an elliptic tube.

[0005]

1 to 3 show an embodiment of a fan coil unit according to the present invention. The fan coil unit includes a casing 1, and a heat exchange chamber 6 provided with a heat exchange coil 2 and a blower chamber 7 communicating with the heat exchange chamber 6 are formed adjacent to each other in the casing 1. An intake port 10 communicating with the chamber 7 and an air supply port 1 communicating with the heat exchange chamber 6
1 and 2 are formed in a casing 1, and a large number of blowers 3 with a DC motor 4 are provided in a blower room 7 independently in a plurality of stages and a plurality of rows. The intake port 10 and the air supply port 11 are formed at an upper portion (a corner in the illustrated example) of the casing 1.

[0006] The blower 3 is a surface D adjacent to the heat exchange chamber of the blower room 7.
The heat exchange chamber adjacent surface is formed so as to be narrower on the side near the air inlet of the space B formed between the heat exchange chamber adjacent surface D and the heat exchange coil 2. One or both of D and the heat exchange coil 2 are inclined, for example, as shown in FIG. 1, FIG. 4 or FIG. FIG. 1 shows a number of blowers 3
4 is inclined, the heat exchange coil 2 is inclined, and FIG. 5 is a diagram illustrating both the heat exchange coil 2 and the heat exchange chamber adjacent surface D provided with a number of blowers 3. This is an example of being inclined. In this way, the air resistance difference between the air inlet near and far from the air inlet of the space B substantially equalizes the amount of air flowing out of each blower 3, so that the air flow uniformly hits the entire air inlet / outlet surface of the heat exchange coil 2. become. The space B
If the widths of the air inlet near the air inlet and the air distant side are uniform, the position of the air inlet 10 as shown in the figure will make suction of the blower 3 farther away than in the vicinity of the air inlet 10 in the space B worse.

As shown in FIG. 1 to FIG. 3, the blowers 3 with the DC motors 4 which are driven separately are provided in a plurality of stages and a plurality of rows so as to be detachable and detachable. When the maintenance work is carried out, work is facilitated. In the illustrated example, the upper and lower stages (four stages) and the left and right stages are arranged in two rows (two rows), and an opening 8 communicating with the heat exchange chamber 6 is provided in the heat exchange chamber 7 The openings 3 are formed on the adjacent surface D, and the blower 3
Are detachably mounted separately. Blower 3 and opening 8
Are arranged in a grid pattern as shown in the figure with respect to the air inlet / outlet surface of the heat exchange coil 2. In addition, the number of the blowers 3 is not limited to the illustrated example, and may be freely increased or decreased. The blowers 3 and the openings 8 may be arranged in a staggered manner with respect to the air inlet / outlet surface of the heat exchange coil 2.

The blower 3 is a small blower (fan),
Compact and energy-saving fan coil unit as a whole
Reduce costs, reduce vibration and noise, simplify the casing, and reduce product costs. If a fan coil unit that does not require high static pressure for air supply to a room or the like in the immediate vicinity, instead of a small number of conventional large-sized blowers, a large number of units capable of obtaining a corresponding total air volume (for example, By using the small blower 3 with the DC motor 4 which is twice or more and the sum of the number of stages and the number of rows is at least 4 and preferably 5 or more), it is possible to reduce the power consumption and the parts cost of the whole blower. In addition, since the small blower 3 is used, the thickness, strength, and weight of the casing 1 need not be increased to prevent noise and vibration. Furthermore, even if the blower 3 is of a push type, it is possible to blow air evenly over the entire heat exchange coil 2. The motor is
For example, instead of a large three-phase 200 V AC motor, a large number of small single-phase 100 V long-life brushless DC motors with good work efficiency and low power consumption are used.

Further, the present invention provides a blow chamber 21 and a suction chamber 22.
A chamber 13 having:
A plurality of air supply ports 25 communicating with the blow-off chamber 21 and a plurality of air intake ports 26 communicating with the suction chamber 22 are provided, and the blow-off chamber 21 of the chamber 13 and the air supply port 11 of the casing 1 are provided.
Suction chamber 22 of chamber 13 and intake port 10 of casing 1
Are connected to each other via a duct 20, and a drive damper 12 is provided at each air supply connection port 25. Chamber 13
It is preferable that the armor plate is a glass wool board,
It may be formed of other members. In the illustrated example, since the chamber 13 is provided above the casing 1 and the DC motor 4 and the drive damper 12 are disposed immediately adjacent to each other, control wiring is easy, equipment costs can be reduced, and there is no need to move to various places and maintenance is required. Is also easy. The position of the chamber 13 can be freely changed. In addition, the air supply chamber 11 of the casing 1 and the air supply port 11 of the casing 1 do not pass through the duct 20.
The chamber 13 may be integrated with the casing 1 by directly connecting the suction chamber 22 of the chamber 13 and the intake port 10 of the casing 1 to each other. In any case, the chamber 13 is installed in the ceiling.

[0010] Further, a blow-off unit in which the blow-out unit and the suction unit are integrated.
A suction unit 27 is provided, and an air supply connection port 25 of the chamber 13 is connected to an air supply connection port 35 of the blow-out / suction unit 27 via a duct 33.
The intake connection port 36 of the blow-out / suction unit 27 is connected to the duct 2
9. As shown in FIG. 6, the blow-out / suction unit 27 includes a panel body 40 having a suction port 38 and a blow-out port 39, and a body 41 having a supply port 35 and a suction port 36. The exterior plate of the body 41 is preferably a glass wool board, but may be formed of other members. The arrangement of the air supply connection port 35 and the intake connection port 36 can be freely changed. For example, the air supply connection port 35 and the intake connection port 36 can be arranged so as to be adjacent to each other as shown in FIG. 6 or to be opposed to each other as shown in FIGS.

Further, as shown in FIG.
A suction port 28, and the air supply connection port 25 of the chamber 13.
Is connected through a duct 33 to the
The suction port 28 is connected to the intake port 26 of No. 3 via a duct 29. Furthermore, a ventilation unit 30 is provided, and an appropriate intake connection port 26 of the chamber 13 is used as an outside air connection port and an exhaust connection port, and the ventilation unit 30 is connected to these through a duct 31. In addition, a drive or a manual damper may be provided at the outside air connection port and the exhaust connection port. As shown in FIGS. 1, 2, and 9, a guide plate 32 that guides outside air from an outside air connection port to the intake port 10 of the casing 1 is provided in the suction chamber 22 of the chamber 13. The guide plate 32 is provided so as to separate the outside air connection port and the exhaust connection port and to be inclined downward in the airflow direction, thereby preventing a shortcut of the inflow outside air. Further, the guide plate 32 is formed so as to open its front end and surround the opening of the duct 20 or a part of the intake port 10 to prevent air from flowing into the intake port 10 from another intake connection port 26. Not to be.

As shown in FIGS. 1 and 3, the air (return air) in an air conditioning zone such as a room is sucked from a blow-out / suction unit 27 and a suction grill 28 by driving the blower 3.
Then, the suction chamber 22 of the chamber 13 passes through the duct 29.
Is sucked into the blower room 7 of the fan coil unit, and is heated or cooled by the heat exchange coil 2 to pass through the duct 33 from the blowout room 21 of the chamber 13 as hot air or cold air.
Air is supplied to the air conditioning zone from the blow-out / suction unit 27 and the blow-out port 34. In the ventilation unit 30, heat is exchanged between exhaust air (return air) from the chamber 13 and outside air from the outside by a total heat exchanger provided therein, and the outside air is sucked into the suction chamber 22 of the chamber 13 and exhausted. Is sent outside.
A duct (not shown) is connected to the ventilation unit 30 to blow outside air and exhaust air. The solid and dotted outline arrows in all the drawings indicate the airflow direction. Note that FIG. 3 and FIG. 12 to be described later are exemplifications, and different devices and combinations may be used. In FIGS. 3 and 12, each duct is indicated by a two-dot chain line.

As shown in FIG. 10, the DC motor 4 has a drive circuit 24 capable of changing the rotational speed, and each fan 3 is provided with a separate alarm means E for reporting a failure thereof. Specifically, the alarm means E is a warning means E for notifying the failure of the blower 3 by detecting the rotation of the DC motor 4, and this warning means E is
A detector 15 for detecting the rotation of the motor, a drive circuit 24 for outputting a rotation signal to the motor and identifying a blower (motor rotation) abnormality based on the signal and a signal from the detector 15, and a blower ( And an alarm device 17 for notifying an abnormality (motor rotation).

For example, if the rotation of a certain DC motor 4 is stopped due to a failure while the rotation signal is being output while the fan coil is operating, the alarm 17 reports which blower 3 (DC motor 4) has failed. Let In this case, the detector 15 only needs to have a function of detecting the presence or absence of rotation of the motor,
The detector 15 and the drive circuit 24 can be simplified. Further, when the detector 15 has a function of detecting the motor rotation speed, the detector 15 can be used for both the determination of the abnormality of the motor rotation and the feedback of the motor rotation speed, and high-precision control can be performed. For example, even if the rotation of the motor does not stop, the rotation speed command value from the drive circuit 24 and the rotation speed detection value from the detector 15 are compared, and the abnormal blower 3 (DC motor 4 ) Can also be reported.

The controller 18 receives a DC signal via a drive circuit 24.
A rotation speed command is issued to the motor 4 to control the air volume of the blower 3 steplessly or stepwise, and individually control the opening and closing of the drive damper 12. The drive circuit 24 is constituted by a microcomputer or the like, and the DC motor 4 is provided with a drive circuit 24 capable of changing the rotation speed steplessly or stepwise. Thereby, the air volume change accompanying the opening and closing of the drive damper 12 can be adjusted by the blower itself, and fine air conditioning can be performed. Further, when the rotation is controlled steplessly, the adjustment of the air volume and the humidity, the intermittent operation, the extremely small wind operation, and the like become easy. Note that the above-mentioned alarm means E only needs to have a function of reporting a failure such as abnormal rotation or abnormal stop of each DC motor 4, and is not limited to the above-described configuration, and may be freely changed.

FIG. 11 shows a case where an alarm means E for notifying the failure of the blower 3 by detecting the air flow of the blower 3 is provided. The alarm means E includes a sensor 23 for detecting the detection of the air flow of the blower 3 and a motor. The rotation signal is output and the sensor 23
A drive circuit 24 for identifying a blower (air volume) abnormality based on a signal from the controller, and an alarm device 17 for notifying a blower (air volume) abnormality based on an abnormality signal from the drive circuit 24. For example, during operation of the fan coil, if the wind of a certain blower 3 stops due to a failure while a rotation signal is output, the alarm 17
It informs which blower 3 has failed. In this case, the sensor 23 only needs to have a function of detecting the presence or absence of wind, and the sensor 23 and the drive circuit 24 can be simplified. Drive circuit 24
Has the same configuration as that of FIG.

FIG. 12 shows another embodiment, in which the drive damper 12 of the air supply connection port 25 is omitted in the embodiment of FIG. 3, and the air supply connection port 35 and the air outlet 34 of the blow-out / suction unit 27 are provided. In addition, a drive damper 12 is provided. The drive damper 12 shown in FIGS. 3 and 12 may be a manual damper. FIG. 13 shows a case where an intake port 10 is formed on the upper surface of the casing 1 and an air supply port 11 is formed on the lower surface of the casing 1. In the illustrated example, the heat exchange chamber adjacent surface D and the heat exchange coil 2 are not inclined, but one or both may be inclined. In each of the above embodiments, FIG.
As described above, the heat exchange chamber adjacent surface D and the heat exchange coil 2 may not be inclined.

In each of the above embodiments, as shown in FIG. 14, the heat transfer tube 14 of the heat exchange coil 2 is formed as an elliptic tube having a radially cut surface in an elliptical shape. It is most preferable that the major axis direction of the elliptical shape be substantially parallel to the blowing direction A in order to reduce the air resistance. Since the cross-section of the heat transfer tube 14 is formed into an elliptical shape having a small shape drag, the ventilation resistance is smaller and the pressure loss is reduced as compared with the case of the circular heat transfer tube, and the contact area of the heat transfer tube 14 with the air flow ( (Heat transfer area) increases, and the amount of heat transfer and heat exchange increases. Moreover, the blower 3 with the smaller DC motor 4
And reduce the number. Note that the heat transfer tube 14 may be a circular tube.

[0019]

According to the first to thirteenth aspects of the present invention, it is possible to control the air conditioning by adjusting the air volume by the blower itself, and to reduce the size, power consumption, cost, and product cost as compared with the conventional one. I can do it. According to the first aspect of the present invention, the air flow distribution with respect to the air inlet / outlet surface of the heat exchange coil 2 can be equalized to maximize the heat exchange capacity. In the invention of claim 2 ,
It can be blown down and is ideal for floor blowout and use in computer rooms. According to the third and seventh aspects of the present invention, air conditioning can be controlled by adjusting the air flow rate by the blower itself, and only the full opening / closing of the damper is required, and no complicated damper or control device is required. Since the chamber 13 also serves as a branch chamber for intake / supply and a silencing chamber, space can be saved. According to the fourth to ninth aspects of the present invention, the blower / suction unit 27 and the outlet 3
4. An air conditioning system equivalent to an air hank can be freely and easily configured by combining various air conditioning devices such as the suction port 28 and the ventilation unit 30. According to the tenth aspect of the present invention, the short circuit of the outside air from the outside air connection port of the chamber 13 to the exhaust connection port can be prevented by the guide plate 32 having a simple structure. According to the eleventh aspect , the weight of the chamber 13 and the blow-out / suction unit 27 can be reduced, and the noise can be reduced and the heat insulation can be achieved. According to the twelfth aspect of the present invention, any of the blowers 3 does not need to be regularly inspected.
It is convenient because it is possible to identify whether or not the air blower is out of order, maintenance is easy and the safety is excellent, and it is possible to avoid the waste and danger of operating the blower 3 with the stopped blower left unattended. Claim 1
According to the invention of the third aspect , the pressure loss is reduced, and the smaller blower 3 is used.
Can be used, and compactness can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a perspective view showing a configuration example.

FIG. 4 is a side view showing another embodiment of the fan coil unit.

FIG. 5 is a side view showing another embodiment of the fan coil unit.

FIG. 6 is a perspective view of a blow-out / suction unit.

FIG. 7 is a perspective view of a modified example of the blow-out / suction unit.

FIG. 8 is a perspective view of another modification of the blow-out / suction unit.

FIG. 9 is a perspective view of a main part of the chamber.

FIG. 10 is an explanatory diagram of a warning unit.

FIG. 11 is an explanatory diagram of another alarm means.

FIG. 12 is a perspective view showing another configuration example.

FIG. 13 is a side view showing still another embodiment of the fan coil unit.

FIG. 14 is a sectional view of a main part of a heat exchange coil.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 casing 2 heat exchange coil 3 blower 4 DC motor 6 heat exchange chamber 7 blower room 10 intake port 11 air supply port 12 drive damper 13 chamber 14 heat transfer tube 20 duct 21 blowout chamber 22 suction chamber 24 drive circuit 25 air supply connection port 26 Inlet connection port 27 Blow-out / suction unit 28 Suction grille 29 Duct 30 Ventilation unit 31 Duct 32 Guide plate B Space D Heat exchange adjacent surface E Alarm means

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 1/00 321 F24F 1/00 381

Claims (13)

(57) [Claims] 1. A casing 1 comprising: a casing 1;
Inside, a heat exchange chamber 6 provided with the heat exchange coil 2 and a blower chamber 7 communicating with the heat exchange chamber 6 are formed adjacent to each other, and an intake port 10 communicating with the blower chamber 7; And a DC motor 4 having a drive circuit 24 capable of changing the rotation speed.
The blower 3 with a fan is placed on the heat exchange room adjacent surface D of the blower room 7.
A large number of units are provided independently in multiple stages and multiple rows, adjacent to this heat exchange chamber.
The suction of the space B formed between the surface D and the heat exchange coil 2
The heat exchange chamber adjacent surface D and the heat
A fan coil unit characterized in that one or both of the exchange coils 2 are inclined . 2. An air supply port 11 is formed on the lower surface of the casing 1.
The fan coil unit according to claim 1. 3. A chamber having a blowing chamber 21 and a suction chamber 22.
A chamber 13 is provided.
And a plurality of air supply connection ports 25 communicating with the suction chamber 22.
And a plurality of intake connection ports 26 communicating with each other.
The air outlet 21 of the casing 13 and the air supply port 11 of the casing 1
The suction chamber 22 of the chamber 13 and the suction port 1 of the casing 1
0, respectively, through or directly in communication with the duct 20;
The fan coil unit according to claim 1 or 2 , wherein a drive damper (12) is provided in each of the air supply connection ports (25 ). 4. A blow-in / suction in which a blow-out section and a suction section are integrated.
A unit 27 is provided, and the air supply connection port 25 of the chamber 13 is provided.
The air supply connection port 35 of the blow-out / suction unit 27
Port 33, and the intake connection port of the chamber 13
26 is connected to the intake connection port 36 of the blow-out / suction unit 27.
The fan coil according to claim 3, wherein the fan coil is connected via a duct 29.
Unit. 5. An air outlet 34 and a suction port 28,
The outlet 34 is connected to the air supply connection port 25 of the chamber 13.
Port 33, and the intake connection port of the chamber 13
26 is connected to the suction port 28 via a duct 29.
The fan coil unit according to claim 3 or 4. 6. A chamber having a blowing chamber 21 and a suction chamber 22.
The bar 13 comprises, in the chamber 13 of this, the outlet chamber 21
And a plurality of air supply connection ports 25 communicating with the suction chamber 22.
And a plurality of intake connection ports 26 communicating with each other.
The air outlet 21 of the casing 13 and the air supply port 11 of the casing 1
The suction chamber 22 of the chamber 13 and the suction port 1 of the casing 1
0, respectively, through or directly in communication with the duct 20;
A blow-out / suction unit 27 integrating a blow-out part and a suction part
The air supply connection port 25 of the chamber 13 is
Connect the air supply connection port 35 of the outlet / suction unit 27 to the duct 33
Through the inlet port 26 of the chamber 13.
The suction connection port 36 of the outlet / suction unit 27 is connected to the duct 2
9 to supply air to the blow-out / suction unit 27
The drive damper (12) is provided in the connection port (35).
The fan coil unit as described. 7. A chamber having a blowing chamber 21 and a suction chamber 22.
A chamber 13 is provided.
And a plurality of air supply connection ports 25 communicating with the suction chamber 22.
And a plurality of intake connection ports 26 communicating with each other.
The air outlet 21 of the casing 13 and the air supply port 11 of the casing 1
The suction chamber 22 of the chamber 13 and the suction port 1 of the casing 1
0, respectively, through or directly in communication with the duct 20;
An air outlet 34 and a suction port 28 are provided.
The outlet 34 is connected to the air connection port 25 through a duct 33.
Then, the suction port 26 of the chamber 13 is connected to the suction port.
28 through a duct 29, and
3. The fan coil according to claim 1, further comprising a dynamic damper.
Unit. 8. An air outlet having a blow-out port and a suction port.
The air outlet 34 is connected to the air supply connection port 25 of the
To the intake connection port 26 of the chamber 13
The suction port 28 is connected via a duct 29, and the
The fan according to claim 6, wherein the drive damper (12) is provided at the opening (34).
Coil unit. 9. A chamber 13 having a ventilation unit 30
Of the outside air connection port and the exhaust connection port
And the ventilation unit 30 is connected to the
9. The fan according to claim 3, 4, 5, 6, 7, or 8 connected.
Coil unit. 10. An outside air contact with the suction chamber 22 of the chamber 13.
Guides outside air from the continuation port to the intake port 10 of the casing 1
10. The fan coil unit according to claim 9, wherein the guide plate is provided.
To 11. A chamber 13 and a blow-out / suction unit 2.
7. The glass panel of claim 7, wherein the outer plate is glass wool board.
The fan coil unit described in 5, 6, 7, 8, 9 or 10
G. 12. A warning to notify each blower 3 of its failure.
The reporting means E is separately provided, and the rotation of the DC motor 4 is detected.
Alarm means E for notifying the failure of the blower 3 or the blower 3
Alarm means E for notifying the stop of the blower 3 by detecting the air volume of
Claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Or the fan coil unit according to 11. 13. The heat transfer tube 14 of the heat exchange coil 2 is an elliptical tube.
Claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 1
The fan coil unit according to 0, 11 or 12.