Abstract: The invention relates to a cuboidal housing for components of a HVAC system. The housing has at least one air inlet, at least one air outlet and a frame. The frame consists of twelve segments which form edge lines. The segments span six open side surfaces in a sealing manner with the open side surface of an adjacent housing, and an insulating means is located between the inner wall and the outer wall. Each panel element has a plastic profile wherein the profile has two bearing limbs each having a bearing surface. In the fitted state, the bearing surface of one bearing limb is in contact with the outer side of the frame segment directly or via at least one further component. In the fitted state, the bearing surface of the other bearing limb faces that side of the frame segment which is facing in the direction of the interior.

Abstract: The invention relates to a cuboidal housing for components of a HVAC system. The housing has at least one air inlet, at least one air outlet and a frame. The frame consists of twelve segments which form edge lines. The segments span six open side surfaces in a sealing manner with the open side surface of an adjacent housing, and an insulating means is located between the inner wall and the outer wall. Each panel element has a plastic profile wherein the profile has two bearing limbs each having a bearing surface. In the fitted state, the bearing surface of one bearing limb is in contact with the outer side of the frame segment directly or via at least one further component. In the fitted state, the bearing surface of the other bearing limb faces that side of the frame segment which is facing in the direction of the interior.

Abstract: A generally closed lab hood having an opening closable by a movable door and connected to a variable-throughput suction source has a vent-control system having a sensor for detecting a velocity of flow of air into the hood and for generating an output corresponding to the detected velocity. A controller connected to the sensor and to the variable-throughput suction source receives the output and operates the suction source to set throughput of the source at a level corresponding to the output so that as the detected velocity increases the throughput of the suction source is increased and vice versa. The controller includes a sensor tube having an inner end opening into the hood and an outer end opening outside the hood and a sensor in the tube for detecting the velocity of air-flow therethrough. This tube is offset from the opening. The controller operates proportionally to set the throughput of the suction source relative to the air-flow velocity.

Abstract: A volume flow controller for air conditioning and ventilation apparatus which has a pivotable flap in a flow duct whose pivot shaft has a lever arm and which is articulated to a spring. To provide a mechanically self-actuating volume flow controller, in which the spring is matched to the control process by a simple adjustment, the spring is a leaf spring whose one end is connected with a lever and whose other end is so fastened on a cam disk that upon adjustment of the cam disk about a rotation point, the leaf spring is entrained by the cam disk and rolls on the curve thereof. A device is provided for fixing the cam disk.

Abstract: The invention concerns a volume flow regulator for ventilation systems with a conduit section (1) in which a regulating part (3) is pivotably mounted about an axle (2) which bisects the conduit cross section, whereby the regulating part (3) has a basically even surface on its leading side and a length which corresponds to the conduit height.In order to reduce the noises produced by the volume flow regulator itself, the regulating part (3) has a semicircular section in a plane vertical to its pivot axle (2), whereby the section radius corresponds to one half the conduit height. In a rectangular conduit section the regulating part (3) is a semicylinder whose curved contour fits against a conduit wall with a slight amount of play in all regulating positions. The regulating part can be balanced in various ways. In addition, a diffuser (24, 27) can be connected in after it which also functions as a sound absorber.

Abstract: A regulator valve for maintaining a constant volumetric flow comprising a flap installed within a flow duct and pivotable from an open position to a closed position against the action of a biasing force, a bellows whose internal volume is in communication via an opening in the flap with the upstream side of the flap, the bellows further being joined to the downstream side of the flap and supported in the duct.