DOMESTIC APPARATUS FOR DETECTING AND EXPULSING GAS

Abstract: Improved alarm clork comprising a clock or watch, time display means, alarm means, means for generating a first number, said number being a random number, means for displaying the random number when the alarm goes off, means for displaying a second number, means for manually modifying said second number and/or said first number, and means for stopping the alarm sound when a predetermined relationship between the first number and the second number is displayed, for example when the first number coincides with the second number.

Description: This invention is made up of a device combining a triple function for detecting dangerous gas leaks, warning of its presence via audio-visual alarms and extracting surplus gas detected to the outside. In the state-of-the-art where this invention resides, referring to gas leak safety appliances, detectors fitted with alarms activated by a certain level of gas build-up are known, as see DE-A-3 706 894. This invention combines the detecting warning and extracting functions into a small sized appliance, particularly conceived for fitting in house kitchens and small rooms. Manufacturing costs involved in this invention are low, meaning that it can be afforded by any consumer and the simplicity of its components makes very low cost repairs possible. The invention is particularly recommended for houses, flats or premises which are uninhabited for long periods of time, where conventional gas leak detectors are ineffective because activation of their audio-visual alarms does not eliminate the risk of gas which is continuing to build up exploding unless someone on the outside perceives the alarms and proceeds to ventilate the room where gas has accumulated. In the face of such risk situations, this invention provides the functional advantage of the fact that the actual device being claimed, after detecting gas and activating its audio-visual alarms, without the user or third parties intervening, automatically extracts the accumulated gas and eliminates the risk of an explosion in the dwelling or gas poisoning of people in the vicinity who, because of some physical handicap such as deafness, or through listening to high volume music or watching the television with the sound high had not perceived the acoustic alarms or are in other rooms and cannot see the visual alarm displays. This invention offers such functional advantages, as it embodies in its small sized casing a fan for expelling gas detected by the device itself to the outside. The fan blades are driven by the shaft of a motor hermetically encapsulated in a place separated from the duct where the gas runs when expelled. This removes the risk of fire from gas coming into contact with some spark caused by the running motor, particularly as the fan shaft point of connection with the motor's encapsulated space is also sealed. Due to providing for the appliance's motor to be encapsulated and that the appliance has to be on the same horizontal plane centred with respect to the fan and the grill for sucking out gas accumulated inside the dwelling, this appliance's extractor duct, seen in an elevated side section, describes a curved trajectory with an inflection point until it links with the outside grill. As an alternative, to improve the appliance's extracting function capacity, the invention provides for the gas expulsion duct to separate or branch off, after a common commencement at the inside grill, into two or more gas extraction channels, also with a curved side cross section with an inflection point. These branched ducts run opposite to each other in diametrically opposed, equidistant trajectories, enclosing an inside space between them where the sealed encapsulated motor is housed which, in this alternative, is positioned with a 90° turn or slope with respect to its position in the alternative of a single extraction duct. A sheet of drawings where examples of this invention's embodiment can be seen is attached for better understanding of this invention's functionality as described. Figure 1 shows a cross section in side elevation of the invention. Figure 2 shows the front of the device claimed viewed from inside the dwelling where installed. Figure 3 shows the alternative to this invention, with the same cross section as Figure 1, made up of a branching off of its inside channel. Figure 4 gives a view of the invention alternative in Figure 3 from inside the dwelling where the device is located. All these figures show the encapsulated motor (1), located inside the casing (2) preferably prismatic-rectangular in shape which structures this gas detector-extractor. Such motor (1) moves the fan blades (3) located facing the grill opening (7) which is directly visible from inside the dwelling where this appliance is installed. In the extraction operation, the gas sucked in by the fan (3) from inside the dwelling for expelling to the outside through the grill (4) enters the appliance through the grill (7) and crosses the expulsion duct (6) which, in its side cross section, adopts a peculiar curved trajectory with a point of inflection, especially conceived for placing the encapsulated motor (1) with respect to the fan (3) opposite on the same horizontal plane. The encapsulated motor is located in a sealed housing into which the gas running through the expulsion duct (6) cannot enter. The point of connection (12) between the fan shaft (11) and the motor's encapsulated space (1) is especially sealed for perfect isolation. The gas detector (5) which is activated by gas accumulation located through the grill (10) starts up the encapsulated motor (1) which, in turn, drives the fan (3) through its shaft (11). The device's acoustic and visual alarms are simultaneously activated. The device's front visible from inside the dwelling displays two light indicators, one for the alert state (8) of the device, which is continuously on to confirm its correct operation, and a second danger indicator (9) which comes on when gas is detected, together with the acoustic alarm. The Figures show the alternative for this invention involving the extractor duct (6), after a short stretch from the grill (7) branching into two identical channels (6) which likewise describe curved trajectories in a side cross section with a point of inflection. They are diametrically opposite and equidistant. Each of the channels (6) end in respective, separate outside grills (4). The branching channels (6) enclose an inside space where the motor (1) is housed. In comparison with its placing in the alternative with a single duct (6), the latter appears turned through 90° and displaced towards the appliance's top area. This displacement correlatively affects the inside grill (7) due to the fact that this opening in the casing (2) coincides in the centre in the same horizontal plane with the shaft (11) of the fan (3) and, in turn, with the motor (1).

Claims: Domestic apparatus for detecting and expulsing gas, comprising a casing (2) with a preferably prismatic-rectangular structure, and an encapsulated motor (1) which drives the blades of a fan (3) for sucking out accumulated gas, said fan (3) being located facing a grill aperture (7) and being activated by a detector (5) which, on sensing the gas leak through the grill (10) starts up the motor (1) and lights up a danger light (9) simultaneously together with an acoustic alarm, and a luminous indicator (9) which is on when the apparatus works correctly, wherein the gas is extracted through an expulsion duct (6) which, after a short stretch from the grill aperture (7) describes a curved trajectory with a point of inflection ending at an outside grill (4) and runs round a sealed space housing the encapsulated motor (1), which is centred on a horizontal plane with the fan (3), whose shaft (11) enters the motor capsule through a completely sealed point of connection (12). Domestic apparatus for detecting and expulsing gas according to claim 1, in which the gas expulsion duct (6), starting from the grill (7) branches into two or more identical ducts (6) with a curved side cross section with a point of inflection, describing diametrically opposed trajectories, equidistant from each other, culminating in respective outside grills (4) for each duct, and the motor (1) is positioned in the inside space delimited by such ducts (6).

Inventors: SIERRA MEDINA MANUEL, SIERRA MEDINA, MANUEL
Applicants: SIERRA MEDINA MANUEL, SIERRA MEDINA, MANUEL
Application year: 1997
Main classification: F24F11
IPC codes: F24F11