US3604625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airflow mixing device for air conditioning systems
Assignee: Dynamics Corp of America
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Filing: 1969-11-03
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Granted: 1971-09-14
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Expires: 1989-11-03
Abstract
Abstract An airflow mixing device for ''''air reheat'''' air-conditioning systems comprising a primary air conduit with an airflow regulator having a pair of swingable variable-flow vanes and a pair of swingable constant-flow vanes. A variable area jet orifice is provided downstream of the regulator with an additional pair of swingable vanes and opposing induction air inlets are provided adjacent the orifice. All vanes are operated by one or more air motors under thermostatic control simultaneously to increase primary airflow and decrease induction airflow and when the latter is reduced to a minimum, valves in the induction inlets are closed to terminate completely the induction flow.
Inventors
- 👤 William J Waeldner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:43
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/26; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
327 words
An airflow mixing device for use in a false ceiling plenum or the like in an air reheat air-conditioning system, said device comprising a conduit for conducting a flow of primary air under pressure, an airflow regulator in said conduit including at least one variable-flow valve member and at least one constant-flow value member, said variable-flow valve member being movable in conduit-opening and -closing directions to vary the rate of primary airflow, and said constant-flow valve member being movable in conduit-opening and -closing directions and having associated means for automatic operation whereby to maintain primary airflow substantially constant at any one flow rate established by said variable-flow valve member, at least one induction air inlet in said conduit downstream of said airflow regulator, means defining a jet orifice substantially smaller in cross-sectional area than said conduit, said orifice being arranged adjacent said induction air inlet whereby to provide a primary air jet for inducing an airflow through said inlet for intermixture with primary air in said conduit, and said orificedefining means including at least one member movable in opening and closing directions for varying orifice area whereby to vary jet velocity and thus to vary the rate of air induction through said inlet, operating means for moving said variable-flow valve member and said orifice-varying member in opening directions in unison but at different rates whereby simultaneously to increase primary airflow and decrease induced airflow, said means serving also to move said members in closing directions in unison for decreasing primary airflow and increasing induced airflow, and a valve member in said induction air inlet, said operating means being connected with and operable to maintain said valve member open during the aforesaid movement of said variable-flow valve member and said orifice-varying member and operable further to move said valve member to close the induction inlet only when said variable-flow valve member and said orifice-varying member have been moved in unison to terminal positions in the aforesaid opening directions.
Claim 2
Dependent Claim
327 words
An airflow mixing device for use in a false ceiling plenum or the like in an air reheat air-conditioning system, said device comprising a conduit for conducting a flow of primary air under pressure, an airflow regulator in said conduit including at least one variable-flow valve member and at least one constant-flow value member, said variable-flow valve member being movable in conduit-opening and -closing directions to vary the rate of primary airflow, and said constant-flow valve member being movable in conduit-opening and -closing directions and having associated means for automatic operation whereby to maintain primary airflow substantially constant at any one flow rate established by said variable-flow valve member, at least one induction air inlet in said conduit downstream of said airflow regulator, means defining a jet orifice substantially smaller in cross-sectional area than said conduit, said orifice being arranged adjacent said induction air inlet whereby to provide a primary air jet for inducing an airflow through said inlet for intermixture with primary air in said conduit, and said orificedefining means including at least one member movable in opening and closing directions for varying orifice area whereby to vary jet velocity and thus to vary the rate of air induction through said inlet, operating means for moving said variable-flow valve member and said orifice-varying member in opening directions in unison but at different rates whereby simultaneously to increase primary airflow and decrease induced airflow, said means serving also to move said members in closing directions in unison for decreasing primary airflow and increasing induced airflow, and a valve member in said induction air inlet, said operating means being connected with and operable to maintain said valve member open during the aforesaid movement of said variable-flow valve member and said orifice-varying member and operable further to move said valve member to close the induction inlet only when said variable-flow valve member and said orifice-varying member have been moved in unison to terminal positions in the aforesaid opening directions.
Claim 3
Dependent Claim
22 words
An airflow mixing device as set forth in claim 1 wherein a thermostat is provided for automatic control of said operating means.
Claim 4
Dependent Claim
41 words
An airflow mixing device as set forth in claim 1 wherein a venturi section is provided in said conduit downstream of said orifice and induction inlet for increased efficiency in delivery of intermixed primary and induction air to a remote location.
Claim 5
Dependent Claim
60 words
An airflow mixing device as set forth in claim 1 wherein said conduit is of generally rectangular cross section, and wherein said airflow regulator comprises a pair of variable-flow valve members in the form of similar cooperating swingable and generally rectangular vanes and a pair of constant-flow valve members in the form of similar cooperating swingable and generally rectangular vanes.
Claim 6
Dependent Claim
52 words
An airflow mixing device as set forth in claim 4 wherein a pair of induction air inlets are provided on opposite sides of said conduit, and wherein said orifice-defining means comprises a pair of similar generally rectangular vanes swingable toward and away from each other respectively to decrease and increase orifice area.
Claim 7
Dependent Claim
27 words
An airflow mixing device as set forth in claim 5 wherein a convergent section is provided in said conduit between said airflow regulator and said orifice vanes.
Claim 8
Dependent Claim
69 words
An airflow mixing device as set forth in claim 5 wherein said operating means comprises an elongated actuating rod disposed longitudinally in said conduit and having portions adjacent said pair of variable-flow vanes and said pair of orifice vanes, and wherein said operating means also comprises connecting means between said variable-flow vanes and said actuating rod thus serving to operate said two pairs of vanes in unison as aforesaid.
Claim 9
Dependent Claim
75 words
An airflow mixing device as set forth in claim 5 wherein each of said induction air inlets is provided with a normally open movable valve member, and wherein said two valve members are connected with said operating means, the latter serving to operate the valve members as aforesaid whereby to close the induction inlets only when said variable-flow vanes and said orifice vanes are moved in unison to terminal positions in the aforesaid opening directions.
Claim 10
Dependent Claim
53 words
An airflow mixing device as set forth in claim 8 wherein said operating means comprises a first motor and an associated actuating means connected with and operating both said variable-flow vanes and said orifice vanes, and a second motor and an associated actuating means connected with and operating said two inlet valve members.
Claim 11
Dependent Claim
65 words
An airflow mixing device as set forth in claim 9 wherein said first and second motors are fluid pressure operable over different ranges of fluid pressure, and wherein a thermostat is connected with said motors and provides fluid pressure signals thereto for operation of said first motor over a first fluid pressure range and operation of said second motor over a second fluid pressure range.
Claim 12
Dependent Claim
37 words
An airflow mixing device as set forth in claim 8 wherein said operating means comprises a single motor and an associated actuating means connected with said variable flow vanes, said orifice vanes, and said inlet valve members.
Claim 13
Dependent Claim
84 words
An airflow mixing device as set forth in claim 11 wherein said motor is fluid pressure operable, and wherein a thermostat is connected with said motor and provides fluid pressure signals thereto over a range of fluid pressures, said actuating means serving to operate said variable-flow vanes and said orifice vanes as aforesaid over a first portion of said range of pressures, and said actuating means serving to operate said inlet valve members as aforesaid over a second portion of said range of pressures.
References Cited (Backward Citations)
US3114505A
Cited
US3516606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |