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Title:
IMPROVEMENTS TO A HELICAL FAN/PUMP/PROPELLER/TURBINE
Document Type and Number:
WIPO Patent Application WO/2020/162766
Kind Code:
A4
Abstract:
The present invention relates to improving the efficiency of a helical fan/pump/propeller/turbine such as is described in PCT/NZ2018/050010. Further to the discovery that specific longitudinal limits are critical to define the first opening in relation to the helical fan/pump/propeller/turbine, it was found that certain lateral limits are also critical. Thus the configuration of the first opening and the helical blade cooperate according to both longitudinal and lateral limits to improve results. This was found to be the case in many applications whether the rotor is mechanically rotated or rotated by an external energy such as wind. In fact, common features such as this can enable the invention to switch between applications in some cases. The present invention also relates to a second opening longitudinally offset from the intake opening and an elongate stator extending from the rotor that is shaped according to the desired flow path

Inventors:
COULTER GRACE (NZ)
Application Number:
PCT/NZ2020/050008
Publication Date:
October 08, 2020
Filing Date:
February 08, 2020
Export Citation:
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Assignee:
SOLARJOULE IP HOLDINGS LTD (NZ)
International Classes:
F04D3/02; B63H1/12; F03B3/04; F03D1/04; F04D19/00; F04D29/52; F04D29/54
Attorney, Agent or Firm:
COULTER, Grace (NZ)
Download PDF:
Claims:
AMENDED CLAIMS

received by the International Bureau on 17 August 2020 (17.08.2020)

1. A device comprising a rotor, the rotor comprising:

an elongate first portion (61) having a longitudinal axis (15) and at least one pair of blades (16), wherein at least one blade (16) extends from a first end (5) of the

elongate first portion (61);

the blade (16) having a root which is substantially helically shaped to the longitudinal axis (15) with a flat and/or concave pressure face;

a first opening (3) defining the fluid intake provided substantially axially aligned with the elongate first portion (61);

a second opening (4) defining a fluid outlet longitudinally offset from the first

opening (3);

wherein the first opening (3) extends longitudinally from a first end (17) of the first opening (3), lateral to the first end (5) of the elongate first portion (61), to a first

maximum longitudinal limit (6) in a housing (2);

and wherein the contour of the first opening (3) is shaped according to a latitudinal limit coordinate (9) and its corresponding longitudinal limit coordinate (48) between the first end (17) and the first maximum longitudinal limit (6); a first end (18) of housing (2);

wherein the surface area of housing (2) between the first end (18) of housing (2) and the first maximum longitudinal limit (6) amounts to at least a fifth of the total

circumference between the first end (18) of housing (2) and the first maximum

longitudinal limit (6).

2. A device as claimed in claim 1 wherein the root in the elongate first portion (61) is substantially helically shaped to the longitudinal axis (15) according to a logarithmic, exponential, power or other sequencing such that the tangent to the root of blade

(16) along the axis (15) approaches perpendicular alignment (78) to the axis (15) at the first end (5) of the elongate first portion (61), and a first end (17) of the first

opening (3), and approaches parallel alignment (79) to the axis (15) at a second end of the elongate first portion (61), and the first maximum longitudinal limit (6) of the first opening (3)

3. A device as claimed in claim 2, comprising:

an elongate second portion (62) enclosed by housing (2)

wherein the tangent to the root of blade (16) along the axis (15) continues to

approach parallel alignment (79) to the axis (15);

an elongate third portion (63) an elongate stator (11) extending from a first end of the elongate third portion (63); the second opening (4) defining the fluid outlet provided substantially axially aligned with the elongate third portion (63);

wherein the second opening (4) extends from a second maximum longitudinal limit (7) to a third maximum longitudinal limit (8) and from a third maximum latitudinal limit (10a) to a fourth maximum latitudinal limit (10b) around the circumference of housing (2);

wherein the elongate stator (11) defines a flow path (20) towards the second opening (4);

wherein the flow path (20) from the second opening (4) is at an acute and/or right angle to the longitudinal axis (15).

4. A device as claimed in claim 3, the elongate stator (11) cooperating with the inner and outer edges of blade (16) as blade (16) rotates;

wherein the diameter of blade (16) decreases and the cross-sectional area of elongate stator (11) increases from the second maximum longitudinal limit (7) to the third maximum longitudinal limit (8).

5. A device as claimed in claim 3, comprising:

one or more saddles (22) connecting the centre of the elongate stator (11) that supports the axis (15) to the outer periphery of the elongate stator (11) opposite one or more second openings (4);

wherein the elongate stator (11) increases in cross-sectional area from the second maximum longitudinal limit (7) to the third maximum longitudinal limit (8);

wherein the elongate stator (11) comprises concave channels (23) on either side(s) of one or more saddles (22) to direct flow at an increasingly acute angle along the longitudinal axis (15) towards the third maximum longitudinal limit (8) of the elongate third portion (63).

6. A device as claimed in claim 4 or 5, the elongate first portion (61) comprising: a first portion (13a) of the elongate first portion (61);

wherein the opening (3) is axially aligned between a first end (17) of the first opening (3) and a first end (18) of housing (2);

a second portion (13b) of the elongate first portion (61) between latitudinal and longitudinal coordinates (9, 48) and between the first end (18) of housing (2) and the first maximum longitudinal limit (6) of the first end portion (13);

a first and a second maximum latitudinal limit (9a and 9b) and their corresponding first maximum longitudinal limit (6) coordinate; 27

wherein the latitudinal and longitudinal coordinates (9, 48) that define the contour of opening (3) are closer to the first end (18) than the maximum latitudinal and longitudinal limits (9a, 6) or (9b, 6);

wherein 9a equals 9b where they converge around the circumference with their corresponding first maximum longitudinal limit (6) coordinate.

7. A device as claimed in claims 4 or 5, wherein the elongate third portion (63) comprises:

vanes (19) longitudinally aligned with the second opening (4) and the elongate stator

(11).

8. A device as claimed in claims 4 or 5, wherein the diameter of housing (2) reduces and the cross sectional area of elongate stator (11) increases from the second maximum longitudinal limit (7) to the third maximum longitudinal limit (8) in the elongate third portion (63);

wherein the rate of the cross-sectional area increases along the elongate stator (11).

9. A device as claimed in claims 4 or 5 comprising:

heat exchange components (28);

an interior air entry conduit fluidly connecting an upper end of heat exchange components (28) and the building interior;

a first air entry conduit connecting a lower end of heat exchange components (28) and the outside air;

a second air entry conduit connecting a lower end of heat exchange components (28) and the inside air;

an exterior vent (30);

a first interior vent (32);

a second interior vent (33);

a first flow control means configured to selectively block or partially block the first air entry conduit;

and a second flow control means configured to selectively block or partially block the second air entry conduit.

10. A device as claimed in claims 4 or 5, the device comprising:

two or more co-axial rotors (1);

a means to invert rotational direction of the two or more co-axial rotors (1);

wherein the means comprises bevel gears (35). 28

11. A device as claimed in claim 1, the rotor comprising:

a first and a second elongate first portions (61) having a longitudinal axis (15), the second elongate first portion (61) having an opposite chirality to the first elongate first portion (61);

at least two pairs of blades (16), wherein at least one first and one second blade extend from the first and second elongate first portions (61);

the first opening (3) defining the fluid intake substantially axially aligned with the first and second elongate first portions (61); the second opening (4) defining a fluid outlet longitudinally offset from the first opening.

12. A device as claimed in claims 4 or 5 comprising:

one or more rotors 1 of opposite chirality rotatable by one or more motors (25); wherein one or more portions of housing (2) enclosing the elongate first, second or third portion (61,62 or 63) rotate independently of rotor (1);

a duct (26) positioned on one or more opposite sides of housing (2) at openings (3 and 4);

a first air entry conduit connecting the first opening (3) and the outside air;

a second air entry conduit connecting the first opening (3) and the interior air;

an exhaust air conduit connecting the second opening (4) and the outside air;

and an exhaust air conduit connecting the second opening (4) and the interior air.

13. A device as claimed in claim 1, wherein blade (16) is rotated by an external energy such as wind or water

14. A device as claimed in claim 13 comprising:

a side (73) of opening (3);

wherein the side (73) is shaped to direct a fluid (54) counter to the direction of blades (16) rotation to create a vortex (72) between housing (2) and blade (16).

15. A device as claimed in claim 13, the device comprising: one or more baffles (36) in one or more blades (16) wherein blade (16) is concave towards the radial outer direction;

a first gap (37) and an inner cylindrical wall (50) between blade (16) and axis (15); a second gap (38) between one or more baffles (36) and the concave surface of blade

(16); 29

an elongate third portion (63) comprising a cavity (47) and a means (29) to capture a fluid.

16. A device as claimed in claim 13, the device comprising:

omni directional guide vanes (40) radiating partially or totally around the blade (16); wherein the one or more baffles (36) are concave towards the concave curve of blade (16).

17. A device as claimed in claims 13, wherein the root in the elongate first portion (61) is substantially helically shaped to the longitudinal axis (15) according to a logarithmic, exponential, power or other sequencing such that the tangent to the root of blade (16) along the axis (15) approaches perpendicular alignment to the axis (15) at the first end (5) of the elongate first portion (61), and approaches parallel alignment to the axis (15) at a second end of the elongate first portion (61) a second elongate first portion (61) having an opposite chirality to the first elongate first portion (61);

wherein the first and second elongate first portions (61) direct a fluid towards the central portion between the first and second elongate first portions (61);

wherein inner cylindrical wall (50) comprises a gap (75).

18. A device as claimed in claim 17, the device comprising:

one or more vertical axis wind turbines (57);

one or more first and second elongate first portions (61) rotatable by wind energy; an elongate third portion (63)

one or more venturi tubes in the walls of the cavity (47) axially aligned with elongate third portion (63);

one or more vertical axis wind turbines (57) to collect condensate (71);

an air entry conduit at a first opening (66);

a first venturi tube housing (69) fluidly connecting the first opening (66) with a second opening (67) smaller than the first opening (66);

a second venturi tube housing (70) fluidly connecting the second opening (67) with a third opening (68) of the second venturi tube housing (70) to collect a

condensate(71)

19. A device as claimed in claim 18, wherein the one or more venturi tube housing (69) is hexagonal