An HVAC system has a plurality of humidity sensors and a controller configured to selectively control which of the plurality of humidity sensors affects operation of the HVAC system. A method of controlling humidity includes providing a plurality of humidity sensors, assigning one of the plurality of humidity sensors as a humidity priority sensor, and affecting a humidity in response to feedback from the humidity priority sensor. A system controller for an HVAC system has an interface configured to present a plurality of humidity sensors and the system controller is configured to allow a user to select which of the plurality of humidity sensors affects operation of the HVAC system.

A method and system to arrange combustion air for a combustion engine or cooling air for an electric motor that are situated in warm indoor space. A started combustion engine or a combustion engine to be started or the air intake equipment of an electric motor has in immediate closeness at least one air intake box where there is connected or will be connected an air channel that reaches the outdoor space and then the outdoor air flows through the air channel to the air intake box and further to the engine air intake equipment. The aspects of the disclosed embodiments are used in the air intake of the lorries, trailer trucks and busses and also power tools and the cooling air of the electric motors.

A ventilation and air conditioning system (6) is for a room (2) containing a heat source and the ventilation and air conditioning system (6) comprising a cooled air supply (12) and a ventilation duct (10). The ventilation duct (10) includes a primary inlet (24) connected to the cooled air supply (12) and an outlet (14) leading into the room (2). A number of heat storage elements (30) is arranged inside the ventilation duct (10) between the primary inlet (24) and the outlet (14), such that during operation of the cooled air supply (12) there is a forced stream of cooled air through the ventilation duct (10), thereby cooling and preferably freezing the heat storage elements (30). A secondary inlet (36) into the ventilation duct (10) is in flow communication with the room (2) and during operation of the cooled air supply (12) is closed by a damper (40). The damper (40) is designed to automatically open in a passive manner when the forced stream of cooled air from the cooled air supply (12) stops, such that a natural convection airflow through the ventilation duct (10) is supported, and the natural convection airflow is cooled by transferring heat to the heat storage elements (30).

A ventilation and air conditioning system (6) is for a room (2) containing a heat source and the ventilation and air conditioning system (6) comprising a cooled air supply (12) and a ventilation duct (10). The ventilation duct (10) includes a primary inlet (24) connected to the cooled air supply (12) and an outlet (14) leading into the room (2). A number of heat storage elements (30) is arranged inside the ventilation duct (10) between the primary inlet (24) and the outlet (14), such that during operation of the cooled air supply (12) there is a forced stream of cooled air through the ventilation duct (10), thereby cooling and preferably freezing the heat storage elements (30). A secondary inlet (36) into the ventilation duct (10) is in flow communication with the room (2) and during operation of the cooled air supply (12) is closed by a damper (40). The damper (40) is designed to automatically open in a passive manner when the forced stream of cooled air from the cooled air supply (12) stops, such that a natural convection airflow through the ventilation duct (10) is supported, and the natural convection airflow is cooled by transferring heat to the heat storage elements (30).

Disclosed is an air deflector driving device, comprising a driving case and connecting rod (3). One side of the driving case is provided with a protruding opening (11), the connecting rod (3) is slidably provided in the driving case, and a tip (31) of the connecting rod (3) is limited in the direction perpendicular to the direction of movement of the connecting rod by means of the limiting structure. Furthermore, also disclosed is an indoor air conditioning unit using the driving device.

An air handling unit, particularly for data center cooling, operates to cool a flow of return air from a conditioned space using a flow of ambient air. The return air is recirculated to the conditioned space as supply air. The flow of ambient air can be adiabatically cooled to a lower temperature to provide additional cooling. A flow of makeup air can be joined with the cooled return air to form the supply air, and can be sourced from the ambient environment directly or from the heated flow of ambient air.

To provide a structure that can improve air permeability from a first space to a second space and can prevent a building structure from increasing in size. A wall 11 has: a body section 35 separating an outside A1 from a living space B1 of a building; a ventilation device 30 provided in the body section 35; and a first ventilation channel 24 and a second ventilation channel 25 provided in the ventilation device 30, the first ventilation channel 24 and the second ventilation channel 25 sending air in the outside A1 to the living space B1, wherein arrangement ranges L1 and L2 of the ventilation device 30 in a thickness direction of the body section 35 are within an arrangement range L3 of the body section 35, and a cross-sectional area of the first ventilation channel 24 in a plane perpendicular to a virtual line E1 indicating a center of the second ventilation channel 24 narrows as it approaches the living space B1 along the virtual line E1.

To provide a structure that can improve air permeability from a first space to a second space and can prevent a building structure from increasing in size. A wall 11 has: a body section 35 separating an outside A1 from a living space B1 of a building; a ventilation device 30 provided in the body section 35; and a first ventilation channel 24 and a second ventilation channel 25 provided in the ventilation device 30, the first ventilation channel 24 and the second ventilation channel 25 sending air in the outside A1 to the living space B1, wherein arrangement ranges L1 and L2 of the ventilation device 30 in a thickness direction of the body section 35 are within an arrangement range L3 of the body section 35, and a cross-sectional area of the first ventilation channel 24 in a plane perpendicular to a virtual line E1 indicating a center of the second ventilation channel 24 narrows as it approaches the living space B1 along the virtual line E1.

A switched-mode light-emitting diode (LED) display unit satisfying fire-fighting smoke exhaust and ventilation requirements includes an LED display unit, a mounting member, an opening-closing actuator and a pressing member. The LED display unit is mounted on the mounting member and the mounting member is mounted on a display panel by an opening-closing actuator and pressed against the display panel by a pressing member. The switched-mode LED display unit provides the pressing member that works to release the pressed mounting member after obtaining a triggering command and the opening-closing actuator that turns on the LED display unit subsequently, thereby meeting the fire smoke exhaust ventilation requirement of the internal surface or the external surface of a building.

A switched-mode light-emitting diode (LED) display unit satisfying fire-fighting smoke exhaust and ventilation requirements includes an LED display unit, a mounting member, an opening-closing actuator and a pressing member. The LED display unit is mounted on the mounting member and the mounting member is mounted on a display panel by an opening-closing actuator and pressed against the display panel by a pressing member. The switched-mode LED display unit provides the pressing member that works to release the pressed mounting member after obtaining a triggering command and the opening-closing actuator that turns on the LED display unit subsequently, thereby meeting the fire smoke exhaust ventilation requirement of the internal surface or the external surface of a building.