AIR CONDITIONING APPARATUSES

• US 3,668,887 A
• Filed: 08/04/1970
• Issued: 06/13/1972
• Est. Priority Date: 08/07/1969
• Status: Expired due to Term

• Current Assignee: Valerio Giordano Riello
• Original Assignee: Valerio Giordano Riello
• Inventors: Riello, Valerio Giordano
• Primary Examiner(s): Wye, William J.
• Application Number:
  US05/060,902
• Time in Patent Office: 679 Days
• Field of Search: 62/262 416/186
• US Class Current: 62/262
• CPC Class Codes: F24F 1/0284 with horizontally arranged fan axis
• CPC Class Codes: F24F 1/031 penetrating a wall or window
• CPC Class Codes: F24F 1/035 characterised by the mounting or arrangement of filters
• CPC Class Codes: F24F 1/0358 with dehumidification means
• CPC Class Codes: F24F 1/037 with humidification means
• CPC Class Codes: F24F 13/20 Casings or covers

Abstract

A reversible air conditioner having a casing divided in a warm and in a cold section by a partition wall, a motor supported in said wall, partly extending in one and partly in the other of said sections and having a shaft projecting from either its ends, a fan in each section for promoting air circulation in each section, said fans being of combined inlet axial and delivery tangential flow type, having recesses oppositely to their axial inlets, and being arranged back-to-back in said sections about the opposite ends of said motor shaft, and the said motor being substantially compenetrated in said recesses of fans.

Claims

1. An air conditioner apparatus, particularly of the reversible type for the air-conditioning of a single room or a small group of rooms, comprising a casing having two substantially parallel faces;

an evaporator contained in said casing adjoining one of said faces;

a condenser unit contained in said casing adjoining the other of said faces;

passage means associated with said units for the intake of air from and the expulsion of air to the outside of said casing;

a partition wall dividing said casing into two sections; and

two rotary fans fitted back to back on either side of said partition wall and adjacent to one or the other of said faces respectively, both said fans being of the axial-tangential flow type having a plurality of curved blades having an intake portion of helical configuration screwly acting on the in-flowing air;

an outlet portion tangentially acting on the air, and intermediate portion progressively evolving from helical to radial, said blades forming channels therebetween wherein the flow is progressively deviated from axial to radial while being acted upon said blades.

2. An improved air conditioner according to claim 1, comprising fans formed with a recess on their backs, and keyed on either ends of the shaft of a motor that is fitted in said partition wall and extending in either sections and into said fan recesses, the sum of axial dimensions of said fans and of said motor being smaller than the distance between the planes defined by the fan inlets.

3. An improved air conditioner according to claim 1, wherein the diameter of axial circular fan inlet portion is smaller than the diameter of tangential outlet portion thereof.

4. An improved air conditioner according to claim 1, wherein the fans comprise paddles having leading edges, the incidence of which gradually varies in reversed proportion to radial distance from the fan, whereby to form on the inlet side a spiral having a substantially constant pitch.

5. An improved air conditioner according to claim 1, wherein a scroll conveyor, circumscribing the related fan wheel is provided in both warm and cold sections, leading said scroll, through a plane essentially tangential to same wheel into a space comprising a baffle plate, by which the air blast, coming from said scroll, is deflected toward the adjacent face of the conditioner.

6. An improved air conditioner according to claim 1, comprising components including tubular fittings and grilles And designed to be indifferently connected with said opposite major faces and formed with separate openings, positioned to juxtapose on the inlet and outlet passages for the air flows provided in either warm and cold sections.

7. The improved air conditioner according to claim 6, wherein each one of said components is formed with inlet and outlet ports for the air flows, being the passage sectional area of inlet port twice as great than that of outlet port, whereby to impart to outflowing air flow a speed at least twice as great that of air flow sucked into the conditioner.

8. The improved air conditioner according to claim 6, comprising a component indifferently connectable to either major faces of the air conditioner casing and designed to fit into a single opening formed on a partition by which the room to be conditioned is separed from the external, said component comprising an essentially rectangular frame, adapted to match with the contour of either said major faces;

an inlet port adapted to be engaged with said opening in said partition, a middle portion by which said rectangular frame is connected with said port, and an inner partition wall that extends from a line crossing said frame, in coincidence with the separation line between the air inlet and outlet ports formed on either said casing faces, to a line by which said opening is subdivided into two inlet and outlet ports, having the inlet port a passage area twice as great that of outlet port.

9. The improved air conditioner according to claim 8, wherein said opening is circular-shaped and wherein said partition wall forms a chord, the area of surface circumscribed by said contour being subdivided by said chord into two portions, one of which is approximately twice as great than the other.

10. The improved air conditioner according to claim 7, wherein the component designed to cover the inwardly directed casing face is formed with essentially coplanar inlet and outlet openings, lying on a plane essentially parallel to heat exchanger (evaporator or condenser) adjacent to the major face of air conditioner casing with which said component is associated, an air-pervious filtering layer being provided to span over both inlet and outlet openings, through which the air is sucked from and delivered back, respectively, into the conditioned room.

11. An improved air conditioner according to claim 1, comprising passages and operator controlled valve means, by which a space upstream of fan of cold section can be selectively and alternately put in communication with a space downstream of fan of warm section, and respectively a space upstream of fan of warm section can be put in communication with a space downstream of fan of cold section for controlledly providing the intake of air from the outside and the delivery thereof, after having been heated (or cooled) into a conditioned room.