JP2002022204A - Vertical supply type true air-conditioning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical supply true air-conditioning unit prevented from the generation of noise and formed in a compact manner. SOLUTION: A coil chamber 2 in which a heat exchange coil 12 is situated and a branch chamber part 20 having a plurality of air supply openings 11 are caused to effect integral intercommunication and integrally intercoupled. An air supply unit 5 for a ceiling having a fan 17 to supply air from the ceiling side to an air-conditioning zone and a fan 21 to supply air from the floor side to the air-conditioning zone and an air supply unit 22 for a floor are caused to communicate with and coupled to the respective air supply openings 11 of the branch chamber part 20 through respective ducts 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical air-conditioning unit having a vertical outlet.

[0002]

2. Description of the Related Art An air conditioner used for supplying air to an air conditioning zone such as a room through a duct has conventionally been provided with a heat exchange coil and a fan integrally in a casing. It was installed in a room and other places 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]

According to the present invention, in order to solve the above-mentioned problems, a coil chamber portion having a heat exchange coil provided therein and a branch chamber portion having a plurality of air supply ports are integrally connected to each other. A ceiling blower unit with a fan that supplies air from the ceiling side to the air conditioning zone, and a floor blower with a fan that supplies air from the floor side to the air conditioning zone, at the air inlet of the branch chamber. And the units are connected to each other via ducts. Further, the total heat exchange chamber section in which the total heat exchanger for outside air treatment was provided was integrally connected to the coil chamber section. Further, the heat exchange coil includes a plurality of branch headers, and circulates and passes the heat medium of a predetermined branch header.
By stopping, the flow rate of the heat medium in the entire coil was adjusted. The heat transfer tube of the heat exchange coil was an elliptic tube. Furthermore, a damper mechanism for preventing backflow from the air conditioning zone to the casing is provided.

[0005]

1 to 4 show an example of a vertical air-conditioning type air-conditioning unit according to the present invention. This air-conditioning unit includes a coil chamber 2 having a heat exchange coil 12 for exchanging heat between air and a heat medium. And a branch chamber section 20 having a plurality of air supply ports 11 are horizontally and integrally connected and connected adjacently, and a total heat exchanger 13 for external air treatment for exchanging heat between outside air and return air is provided inside. The total heat exchange chamber section 3 is replaced with the coil chamber section 2
In addition, they are connected horizontally and integrally adjacent to each other. The coil chamber section 2, the branch chamber section 20, and the total heat exchange chamber section 3 constitute a casing 1 installed on a ceiling or the like, and a damper mechanism B for preventing backflow from the air conditioning zone to the coil chamber section 2 is provided. Provide.

The air supply port 11 of the branch chamber section 20 has a plurality of ceiling blow-out units 5 each having a fan 17 for supplying air to the air conditioning zone from the ceiling side, and air to the air conditioning zone from the floor side. And a plurality of floor blow-out units 22 each having a fan 21 to be connected.
An external air port 9 and an exhaust port 10 are formed in the total heat exchange chamber section 3, and the fan unit 4 that supplies and exhausts air in the total heat exchange chamber section 3 is connected to the external air port 9 and the exhaust port 10 via a duct 27. Connect and connect. A return air inlet 7 communicating with the coil chamber section 2 and a return air inlet 8 communicating with the total heat exchange chamber section 3 are formed on the open space facing surface 1a other than the ceiling installation surface of the casing 1.

[0007] The total heat exchange chamber section 3 includes an external air path 14 for transmitting external air from the external air port 9 to the coil chamber section 2 and a return air path 15 for transmitting return air from the return air inlet 8 to the exhaust port 10. And a total heat exchanger 1 spanning the outside air passage 14 and the return air passage 15.
3 is provided. The return air inlet 7 communicating with the coil chamber 2 is disposed 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 external air fan 18 that supplies external air to the total heat exchange chamber unit 3 and a unit that includes an exhaust fan 19 that exhausts return air from the total heat exchange chamber unit 3 separately or integrally. And provided.

The ceiling 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 connected to and communicated through a plurality of ducts. The outlet 16 is installed on the ceiling plate of the air conditioning zone.
The floor blowing unit 22 includes a fan 21 whose air volume can be controlled, and is distributed below the floor. The outlet 31 of the outlet unit 22 is formed in a casing, and is installed immediately below the floor of the air conditioning zone.

Each of the fans 17 and 21 is provided with a single-phase motor or the like capable of controlling the rotation speed, and separately issues a rotation speed command from a controller (not shown) to each motor to control the air volume steplessly or stepwise. I do. As a result, the air volume can be adjusted by the fan itself without using a VAV unit or a complicated damper mechanism, and fine air conditioning can be performed. Thus, there is no pressure loss and the fan can be reduced in size and noise can be reduced. 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 response to a change in the air volume or a change in the heat load, further energy saving can be achieved.

By driving the fans 17 and 21, the return air of the air-conditioning zone sucked from the return air inlet 7 is supplied to the outside air passage 1.
4 through the filter with the outside air from the heat exchange coil 12
And is cooled or heated to become cool air or hot air, and is diverted in the branch chamber section 20 to be supplied from the ceiling blowing unit 5 and the floor blowing unit 22 to the air conditioning zone. At this time, by stopping desired fans 17 and 21 in accordance with the airflow distribution and the like, air supply can be freely and easily switched from only the ceiling side or only from the floor side. On the other hand, by driving the exhaust fan 19 of the fan unit 4,
The return air of 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, outside air is sent from outside to the outside air port 9 via the fan unit 4, passes through the total heat exchanger 13, and returns to the return air inlet 7.
It is mixed with the return air sucked from.

The casing 1 may be freely constituted by the coil chamber section 2 and the branch chamber section 20 without the total heat exchange chamber section 3 (not shown). In addition, the number of air supply ports 11 of the branch chamber section 20, the blowing unit 5,
The number of the outlets 22 and the number of outlets 16 can be freely increased or decreased, and the structure of the outlet units 5 and 22 can be freely changed.

As shown in FIG. 5 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 appropriately opening and closing the heat medium flow control valve of the branch header 25, it is possible to increase or decrease the heat medium flow rate of the entire coil without decreasing the flowing heat medium flow velocity.

The heat exchange coil 12 includes a fin group 23 having a number of plate fins 28 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. Figure 5
The white arrows in FIG. 7 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. 7 is a view from the direction of the heat transfer tube insertion surface of the fin group 23 (the direction of the axis 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 different branch headers 25 is included in each stage (such as a zone surrounded by a two-dot chain line in FIG. 7). ,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 step near the end in the pipe section step direction, by including each step, heat can be exchanged more efficiently with less waste in accordance with the air volume and wind speed distribution in the coil.

Although not shown, the heat medium may also flow downward. Furthermore, the number of branch headers 25 is not limited to the example shown in the figure, but may be freely changed.
It is free to use more than books. The heat transfer tube 24 is preferably formed as an elliptical tube as shown in FIG. 8 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.

As shown in FIGS. 9 and 1, the damper mechanism B
The opening / closing plate 30 which swings open by the air blown by the fan 17 to be in a ventilation state is provided at the connection port of the duct 6 of the ceiling blowout unit 5. The opening / closing plate 30 is provided in a suspended manner so as to swing around one end edge thereof, and in a non-blowing state, the duct connection port is closed in a closed manner by its own weight. Like opening your mouth
Constitute. This prevents air in the air-conditioning zone from flowing back to the casing 1 of the air-conditioning unit through the air outlet 16, the blow-out unit 5, and the duct 6. Although not shown, the floor blowing unit 22 also has a damper mechanism B having the same configuration as that of FIG.
Is provided in the casing to prevent the air in the air conditioning zone from flowing back to the casing 1 of the air conditioning unit through the blowing unit 22 and the duct 6. In addition, the damper mechanism B may be freely provided at an arbitrary portion such as a duct or a chamber (not shown) connecting the ducts, instead of the blowout units 5 and 22.

[0017]

According to the first aspect of the present invention, air can be blown in two directions from the floor side and the ceiling side. By simply driving and stopping the fans for the floor and ceiling blowout units, air supply can be freely and easily switched from only the ceiling side or only from the floor side, and the airflow distribution in the air conditioning zone during floor side blowing Can be equalized. By dispersing the fan (noise source), the noise of the air conditioning unit is eliminated, and it is compact and does not take up installation space. It can be installed easily by effectively utilizing the dead space such as the ceiling and wall near the air conditioning zone. Eliminates the need for a large machine room, making installation and replacement work easier. The installation near the air-conditioning zone eliminates the need for large and complicated duct work, thereby reducing energy transfer costs and costs. According to the second aspect of the present invention, a total heat exchange mechanism such as a total heat exchanger can be easily installed in a built-up manner, which can respond to diversification of equipment, facilitates heat recovery of return air and external air processing, and facilitates external air processing. No special air conditioner or ventilation unit is required. 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 and the size can be further 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 sectional view showing a part of an embodiment of the present invention.

FIG. 2 is a plan view of the same.

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

FIG. 4 is a simplified plan view on the floor side showing the entire configuration.

FIG. 5 is a perspective view of a heat exchange coil.

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

FIG. 7 is a simplified side view of the same.

FIG. 8 is a side view of a main part of the above.

FIG. 9 is a perspective view illustrating a damper mechanism.

[Explanation of symbols]

 2 Coil chamber part 3 Total heat exchange chamber part 5 Blow-out unit 6 Duct 11 Air supply port 12 Heat exchange coil 13 Total heat exchanger 17 Fan 21 Fan 22 Blow-out unit 24 Heat transfer tube 25 Branch header B Damper mechanism

Claims (5)

[Claims] 1. A coil chamber section 2 having a heat exchange coil 12 therein and a branch chamber section 20 having a plurality of air supply ports 11 are integrally connected to each other. A ceiling blower unit 5 provided with a fan 17 for supplying air from the ceiling side to the air conditioning zone, and a floor blowout unit 22 provided with a fan 21 for supplying air to the air conditioning zone from the floor side, respectively. A vertical air-conditioning type air-conditioning unit, characterized in that the air-conditioning unit is connected to the air conditioner through a vertical line. 2. The vertical air-conditioning unit according to claim 1, wherein the total heat exchange chamber section 3 in which the external heat treatment total heat exchanger 13 is provided is integrally connected to the coil chamber section 2. 3. The heat exchange coil 12 includes a plurality of branch headers 2.
3. The vertical air-conditioning unit according to claim 1, wherein the air-conditioning unit further comprises a flow passage for controlling the flow rate of the heat medium in the entire coil by flowing and stopping the heat medium in the predetermined branch header. 4. The vertical 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 coil chamber section 2.
Or, the vertical air-conditioning unit of the vertical blow-out type described in 4.