JP2001330272A - Proximity air-conditioning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a proximity air-conditioning unit to prevent the generation of noise and be formed in a compact manner. SOLUTION: A casing 1 installed at a ceiling is provided. A coil chamber 2 provided with a heat exchange coil 12 and a total heat exchange chamber 3 provided with a total heat exchanger 13 for treating outside air are caused to be positioned adjacently and intercommunicated with each other for integral formation. A fan unit 4 to supply air of the total heat exchange chamber 3 and a plurality of terminal units 5 having a fan 17 to supply air of the coil chamber 2 to an air-conditioning zone are caused to communicate and couple with each other through a duct 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recent air conditioning unit.

[0002]

2. Description of the Related Art An air conditioner used to supply air to an air conditioning zone in a room or the like by a duct has conventionally been provided with a heat exchange coil and a fan integrally in a casing. It was located away from the air conditioning zone.

[0003]

Therefore, there is a problem that a large and complicated ventilation duct construction is required, the casing becomes large, and a large installation space such as a large machine room is required.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a casing installed on a ceiling, a coil chamber in which a heat exchange coil is provided in the casing, and a total heat exchange for treating outside air. A total heat exchange chamber provided with a heat exchanger is formed integrally by horizontally adjoining and communicating, and a casing is supplied with a fan unit for blowing air of the total heat exchange chamber and air of a coil chamber to an air conditioning zone. A plurality of blowout units equipped with fans are connected to each other through ducts, and a return air intake communicating with the coil chamber and a return air intake communicating with the total heat exchange chamber are provided on the surface of the casing facing the open space. Was formed. In addition, a casing installed on the floor is provided, and a coil chamber provided with a heat exchange coil and a total heat exchange chamber provided with a total heat exchanger for outside air treatment are integrally formed in the casing so as to adjoin and communicate with each other. In the casing, a fan unit that blows the air in the total heat exchange chamber and a plurality of blowout units that have a fan that supplies the air in the coil chamber to the air conditioning zone are connected to each other via a duct, and the casing is connected to the casing. A return air inlet communicating with the coil chamber and a return air inlet communicating with the total heat exchange chamber were formed. Further, the heat exchange coil is provided with a plurality of branch headers, and the flow of the heat medium in a predetermined branch header is made to flow and stop to adjust the flow rate of the heat medium in the entire coil. The heat transfer tube of the heat exchange coil was an elliptic tube. further,
A damper mechanism is provided to prevent backflow from the air conditioning zone to the casing.

[0005]

1 to 4 show an example of a nearest air conditioning unit according to the present invention. This air conditioning unit has a casing 1 installed on a ceiling, and heat exchanges air in the casing 1 with a heat medium. A coil chamber 2 provided with a heat exchange coil 12 and a total heat exchange chamber 3 provided with a total heat exchanger 13 for external air treatment for exchanging heat with return air from the outside air are horizontally formed integrally and integrally formed. A plurality of blow-out units 5 each including a fan unit 4 for blowing air from the total heat exchange chamber 3 to the casing 1 and a fan 17 for supplying air from the coil chamber 2 to the air conditioning zone;
Are connected to each other through a duct 6. Open space facing surface 1 other than ceiling installation surface of casing 1
a, a return air inlet 7 communicating with the coil chamber 2 and a return air inlet 8 communicating with the total heat exchange chamber 3 are formed. An external air port 9 and an exhaust port 10 communicating with each other are formed, and a plurality of air supply ports 11 communicating with the blowout unit 5 are formed on the coil chamber surface of the casing 1.

[0006] The total heat exchange chamber 3 is provided with an external air path 14 for transmitting external air from the external air port 9 to the coil chamber 2 and a return air path 15 for transmitting return air from the return air inlet 8 to the exhaust port 10. The total heat exchanger 13 is provided over the outside air passage 14 and the return air passage 15. The return air inlet 7 communicating with the coil chamber 2 is arranged between the total heat exchanger 13 and the heat exchange coil 12. The total heat exchanger 13 is formed in a rectangular parallelepiped shape in which four outer peripheral surfaces form a ventilation surface, and is disposed with its longitudinal direction being horizontal. The fan unit 4 includes an outside air fan 18 that supplies outside air to the total heat exchange chamber 3;
One provided with an exhaust fan 19 for exhausting return air from the total heat exchange chamber 3 is provided separately or integrally.

[0007] The blowout unit 5 includes a fan 17 whose air volume can be controlled, and is disposed in a ceiling or the like. The outlet 16 of the outlet unit 5 is provided integrally with the casing 18 or is connected to the casing 18 through a plurality of ducts. Outlet 16
Will be installed on the ceiling plate of the air conditioning zone. The fan 17 includes a single-phase motor or the like whose rotation speed can be controlled. A rotation speed command is issued separately from a controller (not shown) to each motor to control the air volume steplessly or stepwise. As a result, fine air conditioning can be performed by adjusting the air volume by the fan itself without using the VAV unit, and the fan can be reduced in size without pressure loss, resulting in low noise. 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.
Further, by controlling the heat medium flow rate to automatically change in accordance with a change in the air volume or a change in the heat load, further energy saving can be achieved. The number of the blowout units 5 can be freely increased or decreased.

By driving the fan 17, the return air of the air conditioning zone sucked from the return air inlet 7 passes through the heat exchange coil 12 through the filter together with the outside air from the outside air passage 14, and is cooled or heated to produce the cool air. Alternatively, hot air is supplied from the blow-out unit 5 to the air conditioning zone. On the other hand, when the exhaust fan 19 of the fan unit 4 is driven, the return air in the air-conditioning zone sucked from the return air inlet 8 passes through the total heat exchanger 13 and is discharged outside through the fan unit 4. By driving the outside air fan 18 of the fan unit 4, the outside air is
The air is sent from outside to the outside air port 9 via the fan unit 4, passes through the total heat exchanger 13, and is mixed with the return air sucked from the return air inlet 7.

As shown in FIG. 4 to FIG.
2 includes a plurality of branch headers 25, and is configured to adjust the flow rate of the heat medium of the entire coil by flowing and stopping the heat medium of a predetermined branch header 25. By stopping the appropriate valve 27, it is possible to increase or decrease the flow rate of the heat medium in the entire coil without decreasing the flow rate of the flowing heat medium.

The heat exchange coil 12 has a fin group 23 in which a number of plate fins 28 are arranged in parallel at predetermined intervals.
The fin group 2 has a plurality of pipe sections 29 in a plurality of stages and rows.
A plurality of heat transfer tubes 24 inserted and fitted in 3 and meandering in the tube row direction, which is a ventilation direction, and a plurality of heat medium inflow-side branch headers 25 connected to one ends of the heat transfer tubes 24;
And one or a plurality of joining headers 26 on the outflow side of the heat medium, which are connected to the other ends of the heat transfer tubes 24. FIG. 4-
The white arrows in FIG. 6 indicate the wind direction of the coil ventilation air passing between the plate fins. Cold water, hot water, and other various heat media enter from the branch header 25 and diverge, pass through a number of heat transfer tubes 24, and merge into the merge header 26. At this time, the air passing through the coil and the heat medium are finned. Group 23 and heat transfer tube 2
Heat is exchanged through the heat exchanger 4.

FIG. 6 shows the fin group 23 viewed from the heat transfer tube insertion surface direction (axial direction of the tube portion).
The line between 9 and 29 indicates an inversion section that connects and connects the pipe sections 29 and 29. The solid line is on the near side and the dotted line is on the back side, and each heat transfer tube 24 of the heat exchange coil 12 is It is provided so as to flow horizontally or upward. In this example, when viewed from the direction of the heat transfer tube insertion surface of the fin group 23, the heat transfer tube 24 is positioned in the middle of the heat transfer tube from the tube portion step direction to the heat medium upstream side (preferably a plurality of times).
So that at least one tube portion 29 of the heat transfer tube 24 connected to the branch header 25 different from each other is included in every one or two stages (as a zone surrounded by a two-dot chain line in FIG. 6). ,Constitute. As a result, the number of coil paths can be increased and the effective length of the heat transfer tube can be increased, and even if only the flow of the heat medium through one branch header 25 includes the pipe portion 29 through which the heat medium flows over almost all stages, the bypass air is The heat exchange capacity with the coil ventilation air can be increased and the heat exchange capacity is high. Further, at least one tube portion 29 of the heat transfer tube 24 connected to the different branch headers 25,
Except for the stage near the end in the tube stage direction, by including each stage, the heat exchange can be performed more efficiently with less waste in accordance with the air volume and wind speed distribution in the coil.

In the above embodiment, the heat medium may also flow downward. The number of branch headers 25 is not limited to the example shown in the figure, but may be changed freely, and may be one. In each of the above embodiments, the heat transfer tube 2
4 is preferably formed in an elliptical tube as shown in FIG. 7 and the major axis of the ellipse is preferably substantially parallel to the wind direction, but may be a circular tube. The arrangement of the tube portions 29 can be freely changed in a zigzag or lattice shape as viewed from the heat transfer tube insertion surface direction of the fin group 23, and the wind direction can be freely changed. Further, the heat medium and the coil ventilation air may be co-current instead of counter-current.

FIGS. 8 and 9 show a floor-standing configuration of the embodiment of FIG. 1. This latest air-conditioning unit includes a casing 1 installed on the floor. A coil chamber 2 provided with a coil 12 and a total heat exchange chamber 3 provided with a total heat exchanger 13 for treating outside air are horizontally adjacently connected to each other and integrally formed. A fan unit 4 for blowing air from the air and a plurality of blowing units 5 provided with a fan 17 for supplying air from the coil chamber 2 to the air-conditioning zone are connected to each other through ducts 6. A return air inlet 7 communicating with the chamber 2 and a return air inlet 8 communicating with the total heat exchange chamber 3 are formed. In this case, the outside air port 9, the exhaust port 10, the return air intake 8, and the return air intake 7 are formed on the upper surface of the casing 1. The other configuration is substantially the same as that of the embodiment of FIG.

In the embodiment shown in FIGS. 1 and 8, a damper mechanism B for preventing backflow from the air conditioning zone to the casing 1 is provided.
Is provided. As shown in FIG. 10, the damper mechanism B is configured by providing an opening / closing plate 30 that swings and opens in a ventilation state by blowing air from a fan 17 at a connection port of the duct 6 of the blowout unit 5. The opening / closing plate 30 is provided in a suspended manner so as to swing around one end edge thereof. In a non-blasting state, the duct connection port is closed in a closed manner by its own weight. Configure to open mouth. This prevents the air in the air conditioning zone from flowing back to the casing 1 of the air conditioning unit through the outlet 16 and the duct connection port. In addition, the damper mechanism B can be freely provided at an arbitrary portion such as a duct or a chamber (not shown) for connecting the ducts, instead of the blowing unit 5.

[0015]

According to the first and second aspects of the present invention, the noise of the air conditioning unit is eliminated by dispersing the fan (noise source).
It is compact and requires no installation space, can be easily installed on the ceiling in the immediate vicinity of the air conditioning zone, and can be easily installed in a casing with a total heat exchanger, eliminating the need for an air conditioner or ventilation unit for treating outside air. The installation near the air-conditioning zone eliminates the need for large and complicated duct work, thereby reducing costs. Since there is a return air intake on the opposite side of the open space, return air can be smoothly introduced and maintenance is easy. According to the third aspect of the present invention, it is possible to control the flow rate minutely, to guarantee the temperature difference at the time of the small load in the large temperature difference small water amount operation, and to achieve the water saving and the energy saving. According to the fourth aspect of the present invention, the pressure loss is reduced, a small fan can be used, and the noise can be reduced and the size can be reduced. According to the fifth aspect of the present invention, even when the blowing of the appropriate outlet is stopped during the operation, the backflow of the air from the outlet can be prevented, and the stable air-conditioning operation can be performed.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is a simplified plan view showing the entire configuration.

FIG. 4 is a perspective view of a heat exchange coil.

FIG. 5 is a simplified plan view of the same.

FIG. 6 is a simplified side view of the same.

FIG. 7 is a side view of a main part of the above.

FIG. 8 is a side view showing another embodiment.

FIG. 9 is a plan view of the same.

FIG. 10 is a perspective view illustrating a damper mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 1a Open space opposing surface 2 Coil room 3 Total heat exchange room 4 Fan unit 5 Blow-out unit 6 Duct 7 Return air intake 8 Return air intake 12 Heat exchange coil 13 Total heat exchanger 17 Fan 24 Heat transfer tube 25 Branch header B Damper mechanism

Claims (5)

[Claims] A casing provided on a ceiling;
A coil chamber 2 provided with a heat exchange coil 12 in a casing 1 and a total heat exchange chamber 3 provided with a total heat exchanger 13 for treating outside air.
Are formed integrally by adjoining and communicating with each other.
A fan unit 4 that blows air in the total heat exchange chamber 3 and a plurality of blowout units 5 including a fan 17 that supplies air in the coil chamber 2 to the air conditioning zone are connected to each other through ducts 6, respectively. Open space facing surface 1 of casing 1
a, a return air inlet 7 communicating with the coil chamber 2 and a return air inlet 8 communicating with the total heat exchange chamber 3. 2. A coil chamber 2 having a casing 1 installed on a floor, and a heat exchange coil 12 provided in the casing 1.
And a total heat exchange chamber 3 provided with a total heat exchanger 13 for outside air treatment, which is integrally formed by adjoining and communicating with the fan unit 4 for blowing air from the total heat exchange chamber 3 to the casing 1; A plurality of blow-out units 5 each having a fan 17 for supplying air from the chamber 2 to the air-conditioning zone are connected to each other through ducts 6, and the casing 1 is connected to a return air inlet 7 communicating with the coil chamber 2. , The return air inlet 8 communicating with the total heat exchange chamber 3,
A latest air conditioning unit characterized by being formed. 3. A heat exchange coil comprising a plurality of branch headers 25, wherein the flow of a heat medium in a predetermined branch header 25 is circulated and stopped to adjust the flow rate of the heat medium in the entire coil. The latest air conditioning unit as described. 4. The latest air conditioning unit according to claim 1, wherein the heat transfer tube of the heat exchange coil is an elliptic tube. 5. A damper mechanism B for preventing backflow from the air conditioning zone to the casing 1 is provided.
The latest air conditioning unit as described.