JPS6218888Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a ceiling-suspended air-conditioning unit that can be made as small as possible in the depth direction, can reach a wide range of conditioned air, and can expand the distribution area.

Until now, air conditioning systems used to cool and heat large floor spaces such as large buildings and large stores have been equipped with a machine room where refrigeration machines are installed to obtain large amounts of cold and warm air, and a conditioned air system installed in the ceiling of each floor. Typical examples include a method in which air handling units are installed on each floor and connected to conditioned air outlets installed at various locations on the ceiling using ducts. The problem was that space was required for the ducts in the building, which had a very large effect on the total height of the building, raising the construction cost.

Therefore, it has recently become common practice to install thin ceiling-suspended fan coil units on the ceilings of rooms that require heating and cooling.
If conventional air conditioning units of this type were to be made thinner, the fan air volume would be insufficient and the distance the blowing air would reach would be shortened, resulting in a narrowing of the assigned area per unit, resulting in an increase in the number of air conditioning units. This resulted in inconveniences such as a rise in equipment costs, an increase in operational noise, and complications in maintenance management.

In view of the fact that conventional ceiling-suspended air conditioning units have various practical drawbacks,
The present invention has been developed with the object of making it possible to increase the blowout amount and the blowing distance while maintaining a thin shape, thereby expanding the area of responsibility for each unit.

Therefore, in order to achieve the above-mentioned object, the present invention has four double-sided suction type radial fans arranged around the center line in the depth direction in a thin casing with an air outlet and a suction port provided at the front. While storing the impeller shafts in a point arrangement such that each impeller shaft faces the same direction on the front side or the rear side, and the blowing direction has an oblique angle to the side surface of the casing,
An electric motor is arranged in the inner part surrounded by the radial fans so as to be flush with each radial fan, and a winding transmission device is suspended between this electric motor and each radial fan to rotate in the same direction. Further, an air-to-air heat exchanger through which a heat medium used for cooling or heating flows is arranged in the casing so as to surround each radial fan flush with the radial fan, an air introduction space that communicates between the suction section and the suction port existing on the front and rear surfaces of each radial fan, and an air introduction space that communicates between the blowout section of each radial fan and the blowout port, and the air heat exchanger. The four radial fans, the electric motor, and the air-to-air heat exchanger are arranged flush with each other, making it possible to minimize the thickness in the depth direction. Moreover, the four double-sided suction type radial fans are capable of sending out conditioned air with a large air volume and a long reach in each of the four circumferences.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In Figures 1 to 3, 1 is a casing which is thin in the depth direction, long in the vertical and horizontal dimensions, and formed into a substantially square cross section, with four suction ports near the center of the front surface. 2... are arranged in a four-sided frame shape and are opened, and a total of four air outlets 3..., one on each side, are opened at the front edge of the side surface, facing the indoor side below the ceiling wall. A suction port 2 and a blowout port 3 are provided at the front.

Note that the cross-sectional shape of this casing 1 may be circular or polygonal in addition to square.

Inside the casing 1, four double-sided suction type radial fans 4, 4... are housed in a rotationally symmetrical four-point arrangement around the center line in the depth direction of the casing 1, with each impeller axle facing toward the front side. Alternatively, they are arranged so that they face the same direction on the rear side (in this example, they face the front side), and the blowing direction of the housing is not perpendicular to the side surface of the casing 1 but has an oblique angle of a certain value. There is.

In this way, one electric motor 5 is arranged in the inner part surrounded by each of the radial fans 4, 4, which are arranged in a rotationally symmetrical four-point arrangement, and aligned with the center line of the casing 1, and this electric motor Reference numeral 5 is arranged such that the output shaft is directed in the same direction as the impeller axis of each radial fan 4, 4... and is flush with the radial fans 4, 4....

Fan pulleys 7, 7... fitted on the impeller shafts of the respective radial fans 4, 4..., a motor pulley 8 fitted on the output shaft of the electric motor 5, and a belt 9.
A winding transmission device consisting of radial fans 4, 4
... and the electric motor 5 so that the radial fans 4, 4 ... can rotate in the same rotational direction, for example, counterclockwise in FIG. 3.

Reference numeral 6 denotes an air-to-air heat exchanger consisting of a cross-fin coil or a finch tube in which needle-like fins are arranged on the tube surface, and has a cylindrical shape, such as a rectangular tube shape, with a short axial length. The heat exchanger 6, in which a heat medium used for heating flows through the heat transfer tubes, is arranged in the casing 1 so as to surround each radial fan 4, 4, flush with each other. By interposing it in the passage of the blowing air sent out from the radial fans 4, 4...
Heat exchange occurs between this blown air and the heat medium.

The arrangement of the radial fans 4, 4..., the electric motor 5, and the heat exchanger 6 is as described above. The air consists of a front suction space A that connects the suction part existing on the front surface of the radial fan 4, 4, and the suction port 2, and a deep suction space B that connects the suction port 2 that exists on the rear surface of the radial fan 4, 4... It is partitioned into two spaces: an inlet space, an air outflow space consisting of a blowout space C that communicates between the blowoff portion of each radial fan 4, 4, and the blowout port 3, and surrounds the heat exchanger 6.

In addition, 11 is a sound deadening plate located at the center of the front, 12 is a drain pan provided in front of the heat exchanger 6, that is, directly below it when installed, and 13 is a drain pan connected to the drain pan 12 and pulled out from the side of the casing 1. 14 is a heat medium inlet/outlet pipe connected to the coil of the heat exchanger 6.

The air conditioning unit having the above-mentioned structure blows cold air or warm air to the outlet 3 by energizing the radial fans 4, 4, etc. while circulating a heat medium such as fluorocarbon refrigerant through the heat exchanger 6. The indoor return air is blown out in all directions from the suction port 2, and an appropriate amount of indoor return air is introduced into the casing 1 from the suction port 2 and reaches the suction portion of the radial fans 4, 4, . . .

During this air conditioning operation, radial fan 4,
Since the blowing air of 4... is designed to blow not at right angles to the heat exchange surface of the heat exchanger 6 but in an oblique direction, the air is distributed over the entire surface of the heat exchange surface and locally passes through. Therefore, the heat exchange efficiency becomes high.

In addition, since it is a push-in air circulation system, the wind noise from the fans does not directly leak into the room, allowing quiet operation, and each radial fan 4, 4... is connected to the air outlet 3, respectively. Since the balloons are arranged one at a time, it is possible to send balloons with a long reach.

As is clear from the above description, in the present invention, the radial fans 4, 4..., the electric motor 5, and the air-to-air heat exchanger 6 are arranged in the casing 1 so as to be flush with each other in the depth direction. The depth dimension can be designed based on the maximum length of the dimensions, and the dimension can be reduced as much as possible to make it thin.

Furthermore, the air blowing mechanism uses a double-side suction type radial fan that sucks in from both the front and rear sides and blows it out to the sides in the centrifugal direction, which increases the suction area and reduces suction resistance to send out air with high air volume and static pressure. In addition, since it has four radial fans 4, 4, etc., and each fan is responsible for blowing out conditioned air from one side, it has a large air volume and a long reach, and can spread over a wide area. Air conditioning of a space can be carried out by one unit, and a reduction in equipment costs can be expected due to the reduction in the number of units.

Moreover, since each radial fan 4, 4... is housed so that the blowing direction has an oblique angle with respect to the side surface of the casing 1, the radial fan 4, 4...
The blown air can be uniformly applied to the heat transfer surface of the heat exchanger 6 surrounding the..., allowing efficient heat exchange.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of one example of the unit of the present invention, FIG. 2 is a longitudinal sectional front view, and FIG. 3 is a sectional view taken along line A--A in FIG. 1...Casing, 2...Suction port, 3...Blowout port, 4...Radial fan, 5...Electric motor, 6...
...air heat exchanger.

Claims (1)

[Scope of utility model registration request] Four double-sided suction type radial fans 4, 4... are arranged at four points around the center line in the depth direction in a thin casing 1 in the depth direction in which an air outlet 3 and an inlet 2 are provided at the front. Each impeller shaft is housed so that it faces the same direction on the front side or the rear side, and the blowing direction has an oblique angle to the side surface of the casing 1, while the inner side surrounded by the radial fans 4, 4... An electric motor 5 is arranged so as to be flush with each radial fan 4, 4... in the section, and a winding transmission device is suspended between the electric motor 5 and each radial fan 4, 4... to rotate the same rotation. An air-to-air heat exchanger 6 that is rotatable in the direction and that circulates a heat medium used for cooling or heating is arranged in the casing 1 so as to surround each radial fan 4, 4, and so on flush with each other. At the same time, the casing 1
an air introduction space that communicates between the suction portions existing on the front and rear surfaces of each radial fan 4, 4, and the suction port 2; A ceiling-suspended air-conditioning unit characterized in that the air-conditioning unit is separated from an air outflow space in which an air-to-air heat exchanger 6 exists.