The present disclosure relates to the field of air conditioning technology. In particular, it involves an air control method for air handler unit.

The present invention includes: a heat plate for heating a lower side of a substrate sliding on an upper surface; and a heat block for heating the heat plate. The heat block includes an air heating flow path for heating air which flows in from a bottom surface side and causing the air to flow out to the heat plate side, the heat plate includes air holes for discharging the air heated by the air heating flow path from the upper surface, the heated air discharged from the air holes forms a heated air atmosphere above the heat plate, and the substrate is transported through the heat air atmosphere. Thereby, curved deformation of the substrate is suppressed.

The present invention includes: a heat plate for heating a lower side of a substrate sliding on an upper surface; and a heat block for heating the heat plate. The heat block includes an air heating flow path for heating air which flows in from a bottom surface side and causing the air to flow out to the heat plate side, the heat plate includes air holes for discharging the air heated by the air heating flow path from the upper surface, the heated air discharged from the air holes forms a heated air atmosphere above the heat plate, and the substrate is transported through the heat air atmosphere. Thereby, curved deformation of the substrate is suppressed.

The invention relates to an electrical, pistol-like handheld tool. The handheld tool includes a tool body for electrically activated machining of a workpiece, a grip part connected to the tool body at an angle thereto, an actuation device for manually activating and/or deactivating the handheld tool, which actuation device is arranged on the tool body or the grip part, and an unlocking device for manually unlocking and/or locking the actuation device. The unlocking device is arranged on the tool body or the grip part such that unlocking is effected by the handheld tool being supported in stable equilibrium on one of the fingers of a user's hand when the grip part is gripped by a user.

Systems, tools, and methods are presented that enable a circuit to introduce a random time delay before actuating a relay to start or stop a supply of electrical power to a heating element of a heating, ventilating, and air conditioning (HVAC) system. In one instance, the circuit includes a time-delay switch electrically connected to the relay. The time-delay switch has a random time delay before entering a closed state or open state. The relay is operable to start and stop a supply of electrical power to the heating element in response to the switch entering, respectively, the closed state and the open state. Other systems, tools and methods are presented. Other systems, tools and methods are presented.

Systems and methods for providing a personal heater are disclosed. In some embodiments, the personal heater comprises a housing, a heating element, and a controller. The housing is configured with an opening for receiving one or more feet. The controller is configured to cause the heating element to heat one or both of an interior and an exterior of the housing based on whether the one or more feet are inside the housing.

Disclosed herein is a method of sublimation printing, a heating system for sublimation printing and a printing device. The method of sublimation printing comprises generating an air flow through a print medium on which a printing substance is deposited and heating the air flow to a temperature at or above a sublimation temperature of the printing substance.

Disclosed are an air duct assembly and a fan heater applying in the air duct assembly, which includes a volute tongue positioned in the volute forms an air duct with the volute. The air duct is configured with an air inlet and an air outlet. A cross-flow wind turbine positioned in the air duct introduce the airflow into the air duct from the air inlet, and blow out the airflow in the air duct through the air outlet. The volute includes a first volute tongue member, the size of the angle between the line connecting the root portion M of the first volute tongue member to the axis O of the cross-flow wind turbine and the line connecting the root portion N of the second volute tongue member to the axis O of the cross-flow wind turbine on the same cross-section is from 110° to 170°.

A system and method for improving the responsiveness of forced hot water heat exchangers placed around the baseboards of conditioned living spaces and improving the efficiently of centralized hot water heating systems. The control system may comprise a convector baseboard heat exchanger or a replacement heat exchanger cover, and a blower, a diffuser and sensors which are mounted to one or more of the baseboard heat exchangers, the heating system influent and effluent loops, the fuel supply and the recirculation pump. When the heating system and forced hot water loop reaches its operating temperature, the blower activates to rapidly transfer energy from the-forced hot water loop into the air and disperse treated, heated air into the conditioned spaces. After the centralized heating system turns off, the system continues to transfer energy from the forced hot water into the air of the conditioned spaces until the latent heat of the centralized heating system has been extracted and the return loop temperatures are at levels consistent with optimal boiler performance.

A system and method for improving the responsiveness of forced hot water heat exchangers placed around the baseboards of conditioned living spaces and improving the efficiently of centralized hot water heating systems. The control system may comprise a convector baseboard heat exchanger or a replacement heat exchanger cover, and a blower, a diffuser and sensors which are mounted to one or more of the baseboard heat exchangers, the heating system influent and effluent loops, the fuel supply and the recirculation pump. When the heating system and forced hot water loop reaches its operating temperature, the blower activates to rapidly transfer energy from the-forced hot water loop into the air and disperse treated, heated air into the conditioned spaces. After the centralized heating system turns off, the system continues to transfer energy from the forced hot water into the air of the conditioned spaces until the latent heat of the centralized heating system has been extracted and the return loop temperatures are at levels consistent with optimal boiler performance.