DC to AC inverter with improved forced air cooling method and apparatus
First Claim
1. A DC to AC inverter having improved structure for cooling itself and increasing power output, comprising:
- (a) an enclosure with a cooling air inlet aperture;
(b) means within the enclosure for inverting DC electricity to AC electricity, said inverting means including power current switches;
(c) a finned heat sink in thermally conductive relationship with said switches;
(d) a cooling air fan connected to the cooling air inlet aperture wherein the cooling air fan moves cooling air through the cooling air inlet aperture;
(e) at least one cooling air outlet through said enclosure;
(f) air guiding means enclosing said cooling air outlet, said air guiding means extending from said air outlet to said heat sink and having means for directing a fan forced air through said finned heat sink;
(g) a power transformer within said enclosure and electronically connected to said switches;
(h) a cooling air passageway through the interior of a transformer metal core; and
(i) a transformer cooling air port to allow air to flow through said transformer cooling air passageway.
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Accused Products
Abstract
An improved DC to AC electrical inverter has a new and improved method and apparatus with forced air ventilation cooling that significantly increases sustainable AC power output. The methods include the steps of forcing an air flow out of the inverter enclosure and over an external heat sink, and forcing an air flow through a special power transformer between the windings and the core. The apparatus has at least one fan, an air outlet and structure for guiding and directing a forced air flow to and over an external heat sink for the power switches. A structure to continuously force cooling air through the power transformer is also provided.
128 Citations
20 Claims
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1. A DC to AC inverter having improved structure for cooling itself and increasing power output, comprising:
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(a) an enclosure with a cooling air inlet aperture; (b) means within the enclosure for inverting DC electricity to AC electricity, said inverting means including power current switches; (c) a finned heat sink in thermally conductive relationship with said switches; (d) a cooling air fan connected to the cooling air inlet aperture wherein the cooling air fan moves cooling air through the cooling air inlet aperture; (e) at least one cooling air outlet through said enclosure; (f) air guiding means enclosing said cooling air outlet, said air guiding means extending from said air outlet to said heat sink and having means for directing a fan forced air through said finned heat sink; (g) a power transformer within said enclosure and electronically connected to said switches; (h) a cooling air passageway through the interior of a transformer metal core; and (i) a transformer cooling air port to allow air to flow through said transformer cooling air passageway. - View Dependent Claims (2)
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3. A DC to AC inverter having improved structure for cooling itself and increasing power output, comprising:
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(a) an enclosure with a cooling air inlet aperture; (b) means within the enclosure for inverting DC electricity to AC electricity, said inverting means including power current switches; (c) a finned heat sink in thermally conductive relationship with said switches; (d) a cooling air fan connected to the cooling air inlet aperture wherein the cooling air fan moves cooling air through the cooling air inlet aperture; (e) at least one cooling air outlet through said enclosure; (f) air guiding means enclosing said cooling air outlet, said air guiding means extending from said air outlet to said heat sink and having means for directing a fan forced air through said finned heat sink; and (g) a second fan positioned to draw air from said enclosure and to expel air from said guiding means, said first and second fans being operatively connected in parallel, said fans being provided their air through said cooling air inlet aperture. - View Dependent Claims (4, 5, 6)
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7. A DC to AC inverter having improved structure for cooling itself and increasing power output, comprising:
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(a) an enclosure with a cooling air inlet aperture; (b) means within the enclosure for inverting DC electricity to AC electricity, said inverting means including power current switches; (c) a finned heat sink in thermally conductive relationship with said switches; (d) a cooling air fan connected to the cooling air inlet aperture wherein the cooling air fan moves cooling air through the cooling air inlet aperture; (e) at least one cooling air outlet through said enclosure; (f) air guiding means enclosing said cooling air outlet, said air guiding means extending from said air outlet to said heat sink and having means for directing a fan forced air flow through said finned heat sink; and (g) a U-section base attached to the inverter wherein said air guiding means is mounted within said U-section base.
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8. A DC to AC inverter having improved structure for cooling itself and increasing power output, comprising:
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(a) an enclosure with a cooling air inlet aperture and a floor; (b) means within the enclosure for inverting DC electricity to AC electricity, said inverting means including power current switches; (c) a finned heat sink in thermally conductive relationship with said switches; (d) a cooling air fan connected to the cooling air inlet aperture wherein the cooling air fan moves cooling air through the cooling air inlet aperture; (e) at least one cooling air outlet through said enclosure; and (f) air guiding means enclosing said cooling air outlet, said air guiding means extending from said air outlet to said heat sink and having means for directing a fan forced air flow through said finned heat sink, and wherein said guiding means is at a level below the level of the floor of said enclosure, so that any water into the guiding means will not drain into the enclosure.
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9. A DC to AC inverter having improved structure for cooling and increasing power output, comprising:
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(a) an enclosure with a cooling air inlet aperture; (b) means within the enclosure for inverting DC electricity to AC electricity, said inverting means including a power transformer having a metal core and windings about a portion of the core; (c) a cooling air fan connected to the cooling air inlet aperture wherein the cooling air fan moves cooling air through the cooling air inlet aperture; (d) means effectively sealing one end of said core to said enclosure, the other end of said core being open within the enclosure; and (e) a transformer cooling air passageway between said core and said windings, said passageway extending through said enclosure, so that said fan forces at least part of its air flow through the inside of said transformer core and directly past the windings. - View Dependent Claims (10, 11, 12, 13)
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14. In the inverting of DC electricity to AC electricity, a method of cooling a DC to AC inverter comprising the steps of:
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a) drawing a flow of ambient air into an enclosure of the inverter; b) turbulently moving the air within the enclosure and over internal electrical componentry of the inverter; c) exhausting at least a portion of the moving air from the inside to the outside of the enclosure; and d) directing the exhausted air over an external heat sink in direct thermal exchange relationship with at least part of the internal electrical componentry and wherein the air is exhausted downwardly and directed upwardly.
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15. In the inverting of DC electricity to AC electricity, a method of cooling a DC to AC inverter comprising the steps of:
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a) drawing a flow of ambient air into an enclosure of the inverter; b) turbulently moving the air within the enclosure and over internal electrical componentry of the inverter; c) exhausting at least a portion of the moving air from the inside to the outside of the enclosure; d) directing the exhausted air over an external heat sink in direct thermal exchange relationship with at least part of the internal electrical componentry; and e) directing a portion of the moving air through the inside of a power transformer and through a transformer cooling air aperture through the enclosure.
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16. In the inverting of DC electricity to AC electricity, a method of cooling a DC to AC inverter comprising the steps of:
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a) drawing a flow of ambient air into an enclosure of the inverter; b) turbulently moving the air within the enclosure and over internal electrical componentry of the inverter; c) exhausting at least a portion of the moving air from the inside to the outside of the enclosure; d) directing the exhausted air over an external heat sink in direct thermal exchange relationship with at least part of the internal electrical componentry, and wherein said portion of moving air is at first drawn from said enclosure and then forced through said aperture and through said transformer and back into said enclosure.
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17. In the inverting of DC electricity to AC electricity, a method of cooling a DC to AC inverter comprising the steps of:
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a) drawing a flow of ambient air into an enclosure of the inverter; b) turbulently moving the air within the enclosure and over internal electrical componentry of the inverter; and c) directing at least a portion of the air through a primary power supply transformer wherein the primary power supply transformer includes a transformer core and a winding coil and wherein the portion of air is directed in between the transformer core and wire winding. - View Dependent Claims (18, 19, 20)
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Specification