US3812770A

US3812770A - Device for air distribution in premises

Info

Publication number: US3812770A
Application number: US00128856A
Authority: US
Inventors: V Morozov
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-03-29
Filing date: 1971-03-29
Publication date: 1974-05-28
Anticipated expiration: 1991-05-28

Abstract

A device, in which a vented rotor is capable of being set in rotation under the effect of an incoming air stream from an air supply duct, whereby an electrical drive for setting the rotor in rotation can be dispensed with, the design of the claimed device is simplified, and it is rendered more economical and efficient than the known air distributing devices.

Description

United States Patent 1191 Morozov I DEVICE FOR AIR DISTRIBUTION IN PREMISES [76] Inventor: Vyacheslav Vyacheslavovich Morozov, Lisnaya ulitsa 13, kv. 4, Moscow, U.S.S.R.

[22] Filed: Mar. 29, 1971 [21] Appl. No.: 128,856

[52] US. Cl 98/40 D [51] Int. Cl F24f 13/06 [58] Field of Search 98/40 B, 40, 15, 23, 38,

[56] References Cited UNITED STATES PATENTS 280,595 7/1883 Fernie 98/37 1,682,966 9/1928 Hoppes.. 415/157 2,848,935 8 1955 ne 1 11 1 g t 41111 14 1 May28, 1974 3,221,634 12/1965 Helle et al. 98/37 X FOREIGN PATENTS OR APPLICATIONS 547,539 9/1942 Great Britain 98/40 D 856,722 11/1952 Germany 98/115 Primary Examiner-William E. Wayner Attorney, Agent, or Firm-Waters, Roditi, Schwartz & Nissen 5 7 ABSTRACT A device, in which a vented rotor is capable of being set in rotation under the effect of an incoming air stream from an air supply duct, whereby an electrical drive for setting the rotor in rotation can be dispensed with, the design of the claimed device is simplified, and it is rendered more economical and efficient than the known air distributing devices.

5 Claims, 4 Drawing Figures PATENTEDKAY 28 19M 3812]? O SHEET 1 or 2 PATENTEDNAY 28 m4 3812770 sum 2 [IF 2 I I ll] mun z W i 5 13 HIIIH DEVICE FOR AIR DISTRIBUTION IN PREMISES This invention relates to equipment for ventilation and air conditioning of premises and, more particularly, to devices for air distribution in premises.

The present device may be used to advantage in heavily heat-loaded premises, in which the intake air is subjected to minimum preheating and the equalized difference in the temperature of the intake and the internal air is as high as 20 C, such as cafes, restaurants, cinemas, libraries, etc.

The device, according to the present invention, is likewise useful in low-ceilinged rooms (2.3 m) characterized by high heat and moisture evolution and a high air-change rate and more).

Known in the art device for air distribution in premises comprises a rotor furnished with vanes (an impeller), said rotor being mounted at the airsupply duct of an air flue and set in rotation by an electric motor. The known device is further characterized in that the rotor diameter is approximately equal to the diameter of the air supply duct, while in the air supply duct provision is made for nozzles whose one end communicates with the inside air and the other end, with the space inside the air supply duct.

The distinctive feature of the known rotary device for air distribution is the distribution of incoming air streams as a result of directing said streams onto the vanes of the impeller driven by an electric motor.

The known air distributor calls for the employment of an independent drive and relevant wiring and suffers from disadvantages inherent in the use of electric motors, such as increased maintenance, lower dependability of operation and shorter service life, an excessively elaborate wiring diagram of the ventilation system, and also an enhanced electric power consumption, the latter factor being responsible in summer period for unwanted preheating of incoming air.

It is an object of the present invention to eliminate the aforementioned disadvantages.

The present invention aims at providing a device for air distribution in premises which will dispense with the use of electric motor for setting the rotor in rotation and, hence, will be economically superior to and more efficient than known air distributors of this type.

This aim is achieved by the provision of a device for air distribution in premises which comprises a rotor furnished with vanes and mounted at the air supply duct of an air flue wherein, according to the invention, the rotor is capable of rotating freely about a shaft under the effect of an air stream issuing from the air supply duct towards the rotor.

The aforesaid arrangement makes it possible to dispense with an independent electric drive, to obviate the undesired preheating of supply air during summer air conditioning periods, to simplify the electrical wiring of ventilation and air conditioning systems, and to reduce initial and operating costs by minimizing the cost of the device and electrical wiring, as well as by simplifying erection operations and reducing the consumption of electric power.

In the preferred embodiment of the present device, the rotor is made in the form of a cone-shaped disk with the apex directed towards the air supply duct, whereby the aerodynamic drag of the device is reduced and the desired direction is imparted to the supply air stream,

said stream being concomitantly dissipated in a more efficient manner.

It is also preferred to use curved vanes disposed on the rotor surface directed towards the air supply duct in order to impart rotational motion to the air supply stream, as well as to enhance air stream dissipation and to ensure rotor rotation.

It is further preferable that the rotor diameter be at least 1.5 times as great as the internal diameter of the air supply duct, thereby providing for air supply stream impact onto the rotor and also for air stream dissipation in the space being conditioned.

Another preferred feature of the present invention is to mount a disk in the gap between the air supply duct and the rotor, the diameter of said disk being somewhat greater than or equal to the internal diameter of the air supply duct and provision being made for displacing said disk along said gap and securing said disk in the desired position. Said disk serves the useful purpose of controlling the incoming air stream by causing a part of said stream to circumflow the rotor so as to change the stream pattern from a dissipated to an essentially directed flow mode. Said disk is also useful inasmuch as it makes possible to mount the device at any desired height and provide vthe desired air flow rate (mobility) in the working zone.

In the preferred embodiment, said disk is conical in shapeand should be disposed so that the cone apex is directed to the air supply duct, this arrangement being conducive to diminishing the aerodynamic drag offered by the present device and also to preventing marked eddying of the incoming stream on its path from the end of the air supply duct to the rotor.

The walls of the air supply duct should preferably be made telescopic, whereby the air supply duct walls may be displaced towards or from said conical disk and alter the free air passage area, the throughput of the present device being accordingly varied.

The present invention is illustrated herein by the description of an exemplary embodiment thereof with reference to the accompanying drawings, wherein:

FIG. 1 is a simplified diagram of the device for air distribution in premises (longitudinal section);

FIG. 2 is the device of FIG. I viewed in the direction of arrow A;

FIG. 3 presents the device, according to the invention, positioned so as to direct the entire incoming air stream onto the rotor, and

FIG. 4 shows the device, according to the invention, positioned so as to direct a part of the incoming air stream onto the rotor.

The present device for air distribution in premises includes a rotor 1 (FIG. I) with vanes 2 which is mounted at the air supply duct 3 of an air flue. The rotor l is made in the form of a conical disk with the apex directed towards the air supply duct 3. The curved vanes 2 are mounted on the rotor surface 4 directed to the air supply duct 3.

To mount the rotor l on a shaft 7, provision is made for a bushing 5 furnished with sliding bearings 6. The shaft 7 diameter is variable: one end of the shaft 7 is threaded to accommodate a safety nut 8, which secures the rotor l in the desired position, while the other end of the shaft 7 is furnished with a protrusion 9 and threaded, thereby making it possible to insert the shaft 7 into a bushing 11 and secure it in place with asafety nut'l0. The bushing 11 is disposed inside the air supply duct 3, the walls of said duct being built up by two telescopic sleeves l2 and 13. The sleeve 12 is fast-fixed and connected to the air flue of an inlet ventilation system, while the sleeve 13 is mounted on the sleeve 12 and is capable of sliding thereon. To secure the sliding sleeve 12 in the desired position, use is made of a screw 14.

The bushing 11 is fastened to the walls of the fastfixed sleeve 12 of the air supply duct 3 by means of braces 15, and in the sleeve 12 provision is made for a flange 16 with bolt holes for bolting said sleeve to the air flue of the inlet ventilation system.

in the gap between the fixed sleeve 12 of the air supply duct 3 and the rotor 1, there is disposed a disk 17 mounted on the shaft 7, which disk is capable of travelling longitudinally in said gap. The disk 17 can be secured in the requisite position by means of a screw 18.

narnic drag offered by the present device is minimized and marked eddying of the incoming stream on its path from the air supply duct 3 to the rotor 3 is obviated.

Shown in FIG. 3 is a schematic elevation view of the device for air distribution in the working position with the conical-disk l7 and the movable sleeve 13 of the air supply duct 3 in the extreme bottom position. Said position of the movable sleeve 13 and the conical disk 17 corresponds to mounting the present air distributing device in low-ceilinged rooms, in which case the total volume of the incoming air should be directed to the vaned rotor 1 so as to yield dissipated incoming jets (the direction of air flow is shown by arrows).

FIG. 4 is a schematic elevation view of the present device in the working position with the movable sleeve 13 of the air supply duct 3 in the extreme top position and the conical disk 17 in an intermediate: position. Said positions correspond to mounting the present air distributing device in high-ceilinged rooms, in which case the incoming air is directed for the most part past the vaned rotor l (the direction of air flow is indicated -by arrows) to yield predominantly directed incoming loses a substantial part of its kinetic energy, thereby causing the rotor l to rotate, acquires rotational motion due to the effect of the vanes 2', undergoes pulsatory dissipation tangetially to the rotor l as a result of continuous alteration of the position of the vanes 2, and

comes to the ventilated space, in which the incoming air intermixes vigorously with the inside air, absorbs heat, moisture and contamitants, and loses all of its initial velocity.

in case a conical disk 17 is interposed between the vaned rotor l and the movable sleeve 13, a part of the incoming air stream flows past the rotor l and enters the working zone being ventilated (1.5 m from the ground) at a high velocity in order to attain the desired air mobility.

The throughput of the present device may be controlled by varying the free air passage area between the movable sleeve 13 and the cone-shaped disk 17 as a result of changing the distance therebetween.

The aforementioned advantages of the present air distributing device have been confirmed by relevant tests. The obtained results show that the present device, when mounted at a height of 2.4 m from the floor level, is capable of equalizing a temperature gradient of 20 C, in case the temperature of the incoming air equals 2 C and the temperature of the inside air is 18 C, and of providing the requisite air mobility, as well as vertical and horizontal temperature gradients in the room being ventilated (conditioned).

What is claimed is:

1. A device for air distribution in premises, comprising: a supply air duct having an air outlet aperture; a vaned rotor mounted externally of said air supply duct in axially spaced alignment with said aperture, said rotor being freely fitted on a shaft so as to be rotatable under the effect of an air stream flowing from said .air supply duct to said rotor; said rotor consisting of an air impervious cone-shaped disk with the cone apex directed towards said air supply duct adapted to receive an axially directed streamof air from said air supply duct and deflect said air stream circumferentially radi ally outwardly, said rotor vanes being curved and mounted on said last-mentioned disk surface so as to effect air distribution in the premises from said vaned rotor in a uniform fan-shaped stream extending through an angle of 360.

2. A device of claim 1 wherein the diameter of said rotor is at least 1.5 times as great as the internal diameter of said air supply duct.

3. A device as claimed in claim 2 wherein in the gap between said air supply duct and said rotor there is mounted a disk having a diameter somewhat greater than or equal to the internal diameter of said air supply duct and provision is made to displace said disk along said gap and to secure said disk in the requisite position.

4. A device as claimed in claim 3 wherein said disk is conical in shape with the cone apex directed towards said air supply duct.

5. A device as claimed in claim 4 wherein the walls of said air supply duct are of telescopic design.

Claims

1. A device for air distribution in premises, comprising: a supply air duct having an air outlet aperture; a vaned rotor mounted externally of said air supply duct in axially spaced alignment with said aperture, said rotor being freely fitted on a shaft so as to be rotatable under the effect of an air stream flowing from said air supply duct to said rotor; said rotor consisting of an air impervious cone-shaped disk with the cone apex directed towards said air supply duct adapted to receive an axially directed stream of air from said air supply duct and deflect said air stream circumferentially radially outwardly, said rotor vanes being curved and mounted on said last-mentioned disk surface so as to effect air distribution in the premises from said vaned rotor in a uniform fan-shaped stream extending through an angle of 360*.