PRESSURE DEVICE WITH ONE-WAY VALVE FOR AN AIRCRAFT CONTROL CENTER

Description

BACKGROUND

[0001] Exemplary embodiments pertain to the art of aircraft and, more particularly, to a pressure device having a one-way valve for an aircraft sense line.

[0002] Aircraft include various sensors and probes that are employed to detect speed, pressure, temperature, and other factors pertaining to flight conditions both inside and outside of a fuselage. Sensors are also used to control various aircraft systems such as pressure relief valves and the like. While many sensors or probes protrude from the aircraft, others may be flush mounted. That is, the fuselage or wing of the aircraft may include an opening and certain ones of the sensors or probes may include a port that registers with that opening. Pressure sensors are disclosed in US 2014 / 065938 A1, US 2016 / 159454 A1, US 2011 / 136425 A1, WO 2005 / 063569 A1 and US 2004 / 216792 A1.

[0003] Periodically, the fuselage and wing surfaces are washed to remove dirt or other buildup that may detract from an overall operational efficiency of the aircraft. Occasionally, when washing the aircraft, water may migrate into a sensor opening. If the water migrates to a portion of the sensor that does not readily drain to ambient, damage my occur. For example, at altitude, the water may freeze, expand, and cause damage to one or more components of the sensor.BRIEF DESCRIPTION

[0004] An aircraft pressure device is provided as defined by claim 1.

[0005] In embodiments, the one-way valve includes a first end section connected to the second end and a second end section connected to the first end, the second end section comprising a valve seat.

[0006] In embodiments, the one-way valve includes a ball configured to selectively rest on the valve seat to prevent liquid flow from the second end passing toward the first end.

[0007] In embodiments, the ball is neutrally buoyant in a selected liquid.

[0008] In embodiments, the selected liquid includes an aircraft washing liquid.

[0009] In embodiments, a controller is operable to selectively fluidically connect an aircraft cabin with ambient.

[0010] In embodiments, the sense line includes a primary sense line and a secondary sense line.

[0011] In embodiments, the one-way valve includes a first one-way valve arranged in the primary sense line and a second one-way valve arranged in the secondary sense line.

[0012] In embodiments, the second end defines an ambient sense port.

[0013] Also provided is an aircraft as defined by claim 10.BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following descriptions should not be considered limiting in any way, the invention being limited by the present claims. With reference to the accompanying drawings, like elements are numbered alike: FIG. 1 is a partial plan view of a forward portion of an aircraft including a pressure device including a one-way valve, in accordance with a non-limiting example; FIG. 2 is a detail view of an outer surface of the aircraft of FIG. 1 showing the pressure device including a one-way valve, in accordance with a non-limiting example; FIG. 3 is a plan view of an inner surface of the aircraft of FIG. 1 showing the pressure device including a one-way valve, in accordance with a non-limiting example; FIG. 4 depicts a perspective view of the pressure device of FIG. 2 including a one-way valve, in accordance with a non-limiting example; FIG. 5 is a schematic diagram depicting the pressure device including a one-way valve of FIG. 1, in accordance with a non-limiting example; and FIG. 6 depicts the one-way valve of the pressure device of FIG. 1, in accordance with a non-limiting example. DETAILED DESCRIPTION

[0015] A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.

[0016] With initial reference to FIGS. 1 and 2, an aircraft in accordance with a non-limiting example, is indicated generally at 10. Aircraft 10 includes a fuselage 14 having an outer surface 18 and an inner surface 20 (FIG. 3) that defines an aircraft cabin 24 (FIG. 5). A pressure device system 30 is provided in aircraft 10. Pressure device system 30 takes the form of a cabin pressure relief system (not separately labeled) that may vent cabin air to ambient through, for example, a blow door 32 if aircraft cabin pressure exceeds a selected value. Pressure device system 30 includes a first positive pressure relief valve 34 and a second positive pressure relief valve 38. Referring to FIG. 3, and with continued reference to FIG. 2, a primary sense line 42 is connected to first positive pressure relief valve 34 and to second positive pressure relief valve 38.

[0017] Primary sense line 42 includes a first end 45 coupled to a sense port (not separately labeled) provided on a sensor body 46 of first positive pressure relief valve 34, a second end 47, and an intermediate portion 50. Second end 47 is exposed to ambient through a remote ambient sense port 53. A branch line 55 extends from intermediate portion 50 to second positive pressure relief valve 38. Each positive pressure relief valve 34, 38 includes an integrated secondary sense line 59 as shown in connection with first positive pressure relief valve 34 in FIG. 4. A similar secondary sense line (not shown) is integrated into second positive pressure relief valve 38. Secondary sense line 59 includes a first end portion 61, a second end portion 63, and an intermediate section 65. First end portion 61 is coupled to a controller 68 on first positive pressure relief valve 34 while second end portion 63 is supported at a flange 69 and is exposed to ambient through outer surface 18 so as to define a secondary sensor port 70.

[0018] In a non-limiting example illustrated in FIGS. 3 and 5, a first valve 73 is arranged in primary sense line 42 and, as shown in FIG. 4 a second valve 80 is arranged in secondary sense line 59. As will be discussed more fully herein, first valve 73 and second valve 80 prevent fluid sprayed onto fuselage 14 from passing into first positive pressure relief valve 34 and second positive pressure relief valve 38. A discussion will now follow referencing FIG.6 in describing first valve 73 with an understanding that second valve 80 includes similar structure. First valve 73 is integrated into intermediate portion 50 between branch 55 and inner surface 20 of fuselage 14. In this manner, first valve 73 provides liquid isolation to both first positive pressure relief valve 34 and second positive pressure relief valve 38 in primary sense line 42.

[0019] According to the invention, first valve 73 is a one-way ball valve 86 that includes a first end section 87, a second end section 88, and a chamber 89 disposed therebetween. A valve seat 90 is arranged in chamber 89 at second end section 88 and a ball 92. Ball 92 is neutrally buoyant in a selected liquid such as a washing liquid used to wash aircraft 10. In operation, ambient pressure may readily flow through first valve 73 and be sensed by controller 68. However, during a washing operation any fluid that may pass into primary sense line 42 via remote ambient sense port 53 is blocked when ball 92 is moved against ball seat 90.

[0020] Thus, fluid that may enter chamber 89 will urge ball 92 to valve seat 90 creating a blockage. As ball 92 is neutrally buoyant in the washing fluid, the blockage will remain until chamber 89 empties under force of gravity. In this manner, first valve 73 prevents washing fluid from entering into first positive pressure relief valve 34 via remote ambient sense port 53, freezing, expanding, and causing damage. In a similar manner, each positive pressure relief valve 34 / 38 includes the second valve 80 integrated into corresponding ones of the secondary sense lines such as secondary sense line 59.

[0021] The term "about" is intended to include the degree of error associated with measurement of the particular quantity based upon the equipment available at the time of filing the application. For example, "about" can include a range of ± 8% or 5%, or 2% of a given value.

[0022] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, element components, and / or groups thereof.

[0023] While the present disclosure has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made without departing from the scope of the invention as defined by the claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the scope of the claims. Therefore, it is intended that the present disclosure not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this present disclosure, but that the present disclosure will include all embodiments falling within the scope of the claims.

Claims

1. An aircraft pressure device (30) including a connection to ambient comprising: a positive pressure relief valve (34, 38) mountable to a fuselage (14) of an aircraft (10), the positive pressure relief valve (34) including a sensor body (46) which includes a sense port; a sense line(42, 59) including a first end (45, 61) connected to the sense port on the sensor body (46), a second end (47, 63) defining an opening in the fuselage, and an intermediate portion (50, 65); and characterized in that the aircraft pressure device further comprises a one-way liquid isolation valve (73, 80) arranged in the intermediate portion spaced from the first end and the second end, the one-way liquid isolation valve being operable to prevent liquid flow from the second end (47, 63) towards the first end (45, 61).

2. The aircraft pressure device according to claim 1, wherein the one-way liquid isolation valve includes a first end section (87) connected to the second end and a second end section (88) connected to the first end, the second end section comprising a valve seat (90).

3. The aircraft pressure device according to claim 2, wherein the one-way liquid isolation valve includes a ball (92) configured to selectively rest on the valve seat to prevent liquid flow from the second end passing toward the first end.

4. The aircraft pressure device according to claim 3, wherein the ball is neutrally buoyant in a selected liquid.

5. The aircraft pressure device according to claim 4, wherein the selected liquid includes an aircraft washing liquid.

6. The aircraft pressure device according to claim further comprising: a controller (68) operable to selectively fluidically connect an aircraft cabin with ambient.

7. The aircraft pressure device according to claim 1, wherein the sense line includes a primary sense line (42) and a secondary sense line(59).

8. The aircraft pressure device according to claim 7, wherein the one-way liquid isolation valve includes a first one-way liquid isolation valve (73) arranged in the primary sense line and a second one-way liquid isolation valve (80) arranged in the secondary sense line.

9. The aircraft pressure device according to claim 1, wherein the second end defines an ambient sense port (53, 70).

10. An aircraft comprising: a fuselage (14) having an outer surface (18) and an inner surface (20) defining a cabin (24); a pressure device (30) as claimed in any preceding claim selectively fluidically connecting the cabin with ambient.