Airconditioning unit

Abstract: This air conditioning unit (1) comprises a case (2), a heat exchanger (11) housed within the case (2), a compressor (9) mounted beside the heat exchanger (11) within the case (2) and enclosed in a compartment (18) separated from the air flow, air intake ports (7) formed on two contiguous sides (3,4) of the case (2), and air discharge ports (8) formed on an opposite side (6) of the case (2) from one (4) of the sides formed with air intake ports (7). The heat exchanger (11) is essentially U-shaped, it having three sides (12,13,14) of which two (12,13) lie adjacent to respective sides (3,4) of the case (2) at the air intake ports (7), and the third (14) is facing a chamber (16) open to the air intake ports (7). By this invention, the advantage of a three-sided (12, 13, 14) heat exchanger (11) is obtained even where one of the case sides (3, 4, 5 and 6) is made inaccessible by the presence of the compressor (9).

Description: This invention relates to a unit of an air conditioning set according to the precharacterizing part of Claim 1 Of air-conditioning sets, those made up of separate units have met with widespread acceptance and comprise an outdoor unit with a heat exchanger which serves as a condenser (or evaporator when arranged for heat pump operation), and an indoor unit having a heat exchanger which serves as an evaporator (or condenser for heat pump operation). One of the two units also accommodates a compressor; both units are usually equipped with fan means for forcing the air flow through the heat exchangers. A basic requirement of these air conditioning units is that the highest capacity for heat exchange be combined with minimal space requirements. One of the approaches adopted to that aim is that of maximizing the size of the heat exchanger. Thus, two- or three-sided heat exchangers have been used wherein each side lies adjacent to a respective side of the outer case at air intake ports thereof. U-shaped heat exchangers for use in air-conditioners are also shown for example in GB-A-2 199 936 The technical problem that underlies this invention is to maximize heat exchange in an air conditioning unit which comprises a compressor beside the heat exchanger, enclosed within a separated compartment from the air flow. This problem is solved by a unit according to Claim 1. By this invention, it becomes possible to provide the advantage of a three-sided heat exchanger even if one of the case sides is made inaccessible by the presence of the compressor. Further features and advantages of an air conditioning unit according to the invention will be more clearly appreciated from the following detailed description of a preferred embodiment thereof, given with reference to the accompanying drawing, the one figure whereof shows it in cross section. In the drawing figure, generally shown at 1 is an air conditioning unit which comprises an outer case 2 of substantially parallelepipedic shape having four sides 3, 4, 5 and 6. The sides 3 and 4 are formed with air intake ports 7 to the case 2, and the side 6 is formed with air discharge ports 8 from the case 2. Housed within the case 2 are a compressor 9 adjacent to side 5, at least one fan 10 adjacent to side 6 at the ports 8, and a heat exchanger 11. The heat exchanger 11 is essentially U-shaped, it having three sides of which two contiguous sides, 12 and 13, lie adjacent to the sides, respectively 3 and 4, of the case 2 at the air intake ports 7; the third side, 14, of the heat exchanger 11 faces the compressor 9. Provided within the case 2 is also a partition 15 between the compressor 9 and the side 14 of the heat exchanger 11, which extends between the side 4 and the side 6 of the container 2; there are thus defined both a chamber 16 between the partition 15, the side 14 of the heat exchanger 11, and a portion 17 of the side 4 of the container 2, and a compartment 18 wherein the compressor 9 is enclosed and held separate from the air flow. In operation, air admitted into the case 2 via the air intake ports 7 is flown through the heat exchanger 11; specifically, the side 12 is swept by air incoming directly through the ports 7 in the side 3 of the case 2, the side 13 is swept by air incoming directly through the ports 7 in the side 4 of the container 2, and the side 14 is swept by air from the chamber 16 whereinto it has been admitted through the ports 7 in the portion 17 of the side 4 of the container 2. All the air, after flowing through the heat exchanger 11, will exit from the ports 8 in the side 6. To further enhance the rate of heat exchange, the heat exchanger 11 may be provided with an additional tier 19 at one of its sides, preferably its major side 13.

Claims: A unit of an air-conditioning set of the type composed of two separate units, said unit comprising a case (2) of substantially parallelepipedic shape, a heat exchanger (11) housed within the case (2), a compressor (9) mounted beside the heat exchanger (11) within the case (2) and enclosed in a compartment (18) separated from the air flow, air intake ports (7) formed on two contiguous sides (3,4) of the case (2), air discharge ports (8) formed in a case side (6) lying opposite from one (4) of the sides formed with air intake ports (7), characterised in that said heat exchanger (11) is essentially U-shaped and has three sides of which two (12, 13) are adjacent to respective sides (3,4) of the case (2) in which the air intake ports (7) are located and a third side (14) which faces the compressor (9); a chamber (16) is situated between said third side (14) and said compressor (9); said chamber (16) is bound by the third side (14) of the heat exchanger (9) and a partition (15) extending from the case side (6) formed with the air discharge ports (8) to the opposite side (4) of the case (2); said chamber (16) is open to said air intake ports (7) such that the third heat exchanger side (14) is swept by air from the chamber (16) which has been admitted through the ports (7); said partition (15) also forms part of the compartment (18) in which the compressor (9) is placed. A unit according to Claim 1, characterized in that said heat exchanger (11) is provided with an additional tier (19) at one (13) of its sides.

Inventors: COLOMBO GUGLIELMO, COLOMBO, GUGLIELMO
Applicants: DELCHI CARRIER SPA, DELCHI/CARRIER S.P.A.
Application year: 1990
Main classification: F24F5
IPC codes: F24F1