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Faucet in a potable water supply system for a vehicle, especially an aircraft

IP.com Disclosure Number: IPCOM000234178D
Publication Date: 2014-Jan-16
Document File: 4 page(s) / 125K

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09111: IP.COM

Abstract

1. ABSTRACT The technical field is a potable water supply system, e.g. in lavatories for an aircraft. Within a lavatory (like any other on ground) means are installed to provide potable water for washing hands. Those means are in particular a faucet, which usually provides an activation of the water flow and means for an adjustment of water’s temperature. To reduce the effort for the electrical installation it is foreseen to provide a single temperature water and/or predetermined water flow time for the passenger in an aircraft for the purpose of hand washing. The temperature and/or the flow time selection are provided by the crew. The major aspect of the technical solution is to remove the possibility provided to the passenger that he/she can adjust the temperature of the water coming out of the faucet individually, preferable done in combination with a touch less activation of the water flow. Another aspect is to remove the thermostat for temperature control and to reach a simple and robust system.

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Faucet in a potable water supply system for a vehicle, especially an aircraft


1. ABSTRACT

The technical field is a potable water supply system, e.g. in lavatories for an aircraft. Within a lavatory (like any other on ground) means are installed to provide potable water for washing hands. Those means are in particular a faucet, which usually provides an activation of the water flow and means for an adjustment of water's temperature. To reduce the effort for the electrical installation it is foreseen to provide a single temperature water and/or predetermined water flow time for the passenger in an aircraft for the purpose of hand washing. The temperature and/or the flow time selection are provided by the crew. The major aspect of the technical solution is to remove the possibility provided to the passenger that he/she can adjust the temperature of the water coming out of the faucet individually, preferable done in combination with a touch less activation of the water flow. Another aspect is to remove the thermostat for temperature control and to reach a simple and robust system.


2. DISCLOSURE

In typical water supply systems for providing water for washing hands, for example in aircraft lavatories, the following design features are used:

- The water stored in the water heater is heated up to a temperature, which is above the temperature of the water coming out of the faucet, and, in order to ensure this.

- A thermostat that controls the final water temperature by mixing hot and cold water, and, thus

- Two water supplies are required: 1) hot, from the water heater and 2) cold, from the potable water tank installed in the aircraft.


- A typical value for the temperature of the water stored in the water heater is 50°C.

A typical set up is shown on the next page:
S. 1


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• The potable water tank provides the water for all consumers installed in the aircraft.


• The water heater stores several 100ml of water and is used as source of hot water.


• The thermostat, which is adjusted by the control device in the shown configuration, reduces the water temperature coming out of the Faucet not being harmful to the passenger (scalding).


• The passenger activates the water flow by an activation device, e.g. an infrared sensor. If activated, the valve opens for a predefined time.


• The passenger selects the desired temperature at the faucet by selecting the temperature at the device "Temperature Selection provided to User".


• The drain valve is installed to allow drainage of the system.

The existing solutions differ in complexity und human machine interface. Whereas a purely mechanical solution is quite simple, it is not optimized with respect to hygienic aspects (faucet has to be touched by user). On the other side, electro-mechanical solutions are quite complex but better in f...