US5090476A — Air-water heat exchanger for a control box

Claim 1

Independent Claim 239 words

In an air-water heat exchanger with an exchanger unit and a blower contained in a housing, placed on a cover of a control box and provided on a side facing said cover with a plurality of exchanger openings which are aligned with corresponding cover openings of said cover of said control box, the improvement comprising: said exchanger unit (12) positioned in a collecting tub (14) in which at least one of a fill level sensor and temperature sensor (17) is disposed; in an area above said exchanger unit (12), a separating wall (15) in said housing (19) separating an inlet chamber (EK) from an outlet chamber (AK); in said inlet chamber (EK), an inlet conduit (21), starting at an inlet opening (20), separated from an inlet side (27) of said exchanger unit (12) by a first deflection piece (13) and only connected with said inlet side (27) of said exchanger unit (12) through an inflow opening (22) located above said exchanger unit (12); in said outlet chamber (AK), second and third deflection pieces (18, 29) forming an outlet conduit (31) coming from an outlet side (28) of the exchanger unit (12), which is connected above said exchanger unit (12) through an outflow opening (23) with a remaining space of said outlet chamber (AK); and said blower (26) disposed in said remaining space of said outlet chamber (AK) and having an outlet connector (32) changing into an outlet opening (25).

Claim 2

Dependent Claim 239 words

In an air-water heat exchanger with an exchanger unit and a blower contained in a housing, placed on a cover of a control box and provided on a side facing said cover with a plurality of exchanger openings which are aligned with corresponding cover openings of said cover of said control box, the improvement comprising: said exchanger unit (12) positioned in a collecting tub (14) in which at least one of a fill level sensor and temperature sensor (17) is disposed; in an area above said exchanger unit (12), a separating wall (15) in said housing (19) separating an inlet chamber (EK) from an outlet chamber (AK); in said inlet chamber (EK), an inlet conduit (21), starting at an inlet opening (20), separated from an inlet side (27) of said exchanger unit (12) by a first deflection piece (13) and only connected with said inlet side (27) of said exchanger unit (12) through an inflow opening (22) located above said exchanger unit (12); in said outlet chamber (AK), second and third deflection pieces (18, 29) forming an outlet conduit (31) coming from an outlet side (28) of the exchanger unit (12), which is connected above said exchanger unit (12) through an outflow opening (23) with a remaining space of said outlet chamber (AK); and said blower (26) disposed in said remaining space of said outlet chamber (AK) and having an outlet connector (32) changing into an outlet opening (25).

Claim 3

Dependent Claim 48 words

An air-water heat exchanger in accordance with claim 1, wherein said separating wall (15) is connected to said exchanger unit (12) approximately in a center of a top of said exchanger unit (12) and extends to said housing (19), which is in a shape of a covering hood.

Claim 4

Dependent Claim 96 words

An air-water heat exchanger in accordance with claim 1, wherein said first deflection piece (13) is disposed at a first inlet side distance from and approximately parallel to said inlet side (27) of said exchanger unit (12), extends above a top of said exchanger unit (12) and, while maintaining said inflow opening (22) free by an inlet beveled edge, approaches said separating wall (15) at a second inlet side distance from the exchanger unit (12), and together with a facing side wall of said housing (19), forms said inlet conduit (21) to said inlet chamber (EK).

Claim 5

Dependent Claim 109 words

An air-water heat exchanger in accordance with claim 1, wherein a circumferential inlet collar (35) of said collecting tub (14), which extends into said housing (19), defines said inlet opening (20), a drip pan (16) of said collecting tub (14), a bottom of which rises toward said blower (26), forms together with a circumferential side wall (36) said circumferential inlet collar (35) of said inlet opening (20), and said first deflection piece (13) is inserted underneath said exchanger unit (12) into said drip pan (16), which has been drawn up into said housing (19), and is connected with said circumferential side wall (36) of said circumferential inlet collar (35).

Claim 6

Dependent Claim 33 words

An air-water heat exchanger in accordance with claim 1, wherein said collecting tub (14) closes an open side of said housing (19) except for said inlet opening (20) and said outlet opening (25).

Claim 7

Dependent Claim 132 words

An air-water heat exchanger in accordance with claim 1, wherein said second deflection piece (18) is disposed at a first outlet side distance from and approximately parallel to said outlet side (28) of said exchanger unit (12) in said collecting tub (14), extends above said top of said exchanger unit (12) and, while maintaining said outflow opening (23) free by an outlet beveled edge, approaches said separating wall (15) at a second outlet side distance from said exchanger unit (12), an exchanger upper area of said outlet side (28) of said exchanger unit (12) is partially covered by said third deflection piece (29) which extends obliquely, and said third deflection piece (29), together with a section of said second deflection piece (18), forms said outlet conduit (31) into said outlet chamber (AK).

Claim 8

Dependent Claim 39 words

An air-water heat exchanger in accordance with claim 6, wherein said third deflection piece (29) terminates at a third outlet side distance from said second deflection piece (18) and forms an entry opening (30) into said outlet conduit (31).

Claim 9

Dependent Claim 28 words

An air-water heat exchanger in accordance with claim 1, wherein said collecting tub (14) is in communication with a runoff connector (33) leading out of said housing (19).

Claim 10

Dependent Claim 53 words

An air-water heat exchanger in accordance with claim 1, wherein a circumferential outlet collar (38), drawn upwards on said collecting tub (14) and extending into said housing (19), forms a border of said outlet opening (25), and said outlet connector (32) of said blower (26) is inserted into said circumferential outlet collar (38).

Claim 11

Dependent Claim 48 words

An air-water heat exchanger in accordance with claim 1, wherein said collecting tub (14) extends beyond a circumferential edge (40) and forms with an upright sealing edge (39) a receptacle (41) for a sealing element (42), on which a front face of said housing (19) is tightly supported.

Claim 12

Dependent Claim 82 words

An air-water heat exchanger in accordance with claim 1, wherein said drip pan (16) of said collecting tub (14) is disposed only underneath said exchanger unit (12), forming a runoff channel (34) on both sides of said exchanger unit in a direction of a circumferential edge (40) of said collecting tub (14), which is connected with a runoff connector (33) outside o said circumferential inlet collar (35) and said circumferential outlet collar (38) for said inlet and outlet openings (20, 25), respectively.

Claim 13

Dependent Claim 53 words

An air-water heat exchanger in accordance with claim 1, wherein said first and said second deflection pieces (13, 18) are disposed at a distance from a plurality of side walls of said housing (19) and, at least in an area of a runoff channel (34), do not extend to said collecting tub (14).

Claim 14

Dependent Claim 96 words

An air-water heat exchanger in accordance with claim 2, wherein said first deflection piece (13) is disposed at a first inlet side distance from and approximately parallel to said inlet side (27) of said exchanger unit (12), extends above a top of said exchanger unit (12) and, while maintaining said inflow opening (22) free by an inlet beveled edge, approaches said separating wall (15) at a second inlet side distance from the exchanger unit (12), and together with a facing side wall of said housing (19), forms said inlet conduit (21) to said inlet chamber (EK).

Claim 15

Dependent Claim 109 words

An air-water heat exchanger in accordance with claim 13, wherein a circumferential inlet collar (35) of said collecting tub (14), which extends into said housing (19), defines said inlet opening (20), a drip pan (16) of said collecting tub (14), a bottom of which rises toward said blower (26), forms together with a circumferential side wall (36) said circumferential inlet collar (35) of said inlet opening (20), and said first deflection piece (13) is inserted underneath said exchanger unit (12) into said drip pan (16), which has been drawn up into said housing (19), and is connected with said circumferential side wall (36) of said circumferential inlet collar (35).

Claim 16

Dependent Claim 33 words

An air-water heat exchanger in accordance with claim 14, wherein said collecting tub (14) closes an open side of said housing (19) except for said inlet opening (20) and said outlet opening (25).

Claim 17

Dependent Claim 132 words

An air-water heat exchanger in accordance with claim 15, wherein said second deflection piece (18) is disposed at a first outlet side distance from and approximately parallel to said outlet side (28) of said exchanger unit (12) in said collecting tub (14), extends above said top of said exchanger unit (12) and, while maintaining said outflow opening (23) free by an outlet beveled edge, approaches said separating wall (15) at a second outlet side distance from said exchanger unit (12), an exchanger upper area of said outlet side (28) of said exchanger unit (12) is partially covered by said third deflection piece (29) which extends obliquely, and said third deflection piece (29), together with a section of said second deflection piece (18), forms said outlet conduit (31) into said outlet chamber (AK).

Claim 18

Dependent Claim 39 words

An air-water heat exchanger in accordance with claim 16, wherein said third deflection piece (29) terminates at a third outlet side distance from said second deflection piece (18) and forms an entry opening (30) into said outlet conduit (31).

Claim 19

Dependent Claim 28 words

An air-water heat exchanger in accordance with claim 17, wherein said collecting tub (14) is in communication with a runoff connector (33) leading out of said housing (19).

Claim 20

Dependent Claim 53 words

An air-water heat exchanger in accordance with claim 18, wherein a circumferential outlet collar (38), drawn upwards on said collecting tub (14) and extending into said housing (19), forms a border of said outlet opening (25), and said outlet connector (32) of said blower (26) is inserted into said circumferential outlet collar (38).

Claim 21

Dependent Claim 48 words

An air-water heat exchanger in accordance with claim 19, wherein said collecting tub (14) extends beyond a circumferential edge (40) and forms with an upright sealing edge (39) a receptacle (41) for a sealing element (42), on which a front face of said housing (19) is tightly supported.

Claim 22

Dependent Claim 82 words

An air-water heat exchanger in accordance with claim 20, wherein said drip pan (16) of said collecting tub (14) is disposed only underneath said exchanger unit (12), forming a runoff channel (34) on both sides of said exchanger unit in a direction of said circumferential edge (40) of said collecting tub (14), which is connected with said runoff connector (33) outside of said circumferential inlet collar (35) and said circumferential outlet collar (38) for said inlet and outlet openings (20, 25), respectively.

Claim 23

Dependent Claim 53 words

An air-water heat exchanger in accordance with claim 21, wherein said first and said second deflection pieces (13, 18) are disposed at a distance from a plurality of side walls of said housing (19) and, at least in an area of said runoff channel (34), do not extend to said collecting tub (14).

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-02-24	1995-08-26	1996-02-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-02-24	1999-08-26	2000-02-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-02-24	2003-08-26	2004-02-25	$7700.00	Window Closed / Lapsed

Air-water heat exchanger for a control box

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