55results about How to "Improve air conditioning efficiency" patented technology

An air conditioning apparatus for a hydraulic shovel with which a wide space in a cab can be secured and a placement operation of ducts for distributing wind to each important point in the cab is facilitated. For this purpose, in the air conditioning apparatus, an air-conditioning unit (21) is placed at a front portion of a right side in a cab (10). The air-conditioning unit (21) is mounted to a front portion of a right side wall surface (51) of the cab (10). The air-conditioning unit (21) is mounted to the right side wall surface (51) of the cab (10) to be capable of being taken in and out from an inside and an outside of the cab (10).

A multi-unit air conditioner includes: an outdoor unit including a flow path control valve for controlling the flow path of refrigerant from a compressor, an outdoor heat exchanger one side of which communicates with the flow path control valve, a first side One end of the first bypass line is connected to the first line connecting the flow path control valve and the outdoor heat exchanger, and the other end is connected to the second line connected to the other end of the outdoor heat exchanger. a control valve provided on the first bypass line for controlling the flow rate of refrigerant passing through the first bypass line; an indoor unit having an indoor heat exchanger and an indoor electronic expansion valve installed in each room; a distributor, for selectively distributing refrigerant received through one of the two lines connected to the outdoor unit to the indoor unit and returning the refrigerant to the outdoor unit through the other line; and a control device for measuring the The gas / liquid mixing ratio of the refrigerant in the refrigerant is combined after passing through the first bypass line and the outdoor heat exchanger respectively. The control device is used to control the opening of the flow control valve, thereby controlling the mixing ratio.

The invention discloses an energy-saving device of an air curtain of a gate of a building. The energy-saving device comprises the air curtain, a trench, a grille plate and a reflection plate, and the use of the device can lead the air curtain of the gate of the building to have no leakage or failure basically, thereby effectively improving the efficiency of an air conditioner in the building and saving a great amount of energy.

The invention discloses a heat removal device of a communication electrical appliance. The communication electrical appliance is arranged in a cabinet; the cabinet is provided with an air-inlet end face from which cooling air is fed and an air-exhaust end face from which heating air is exhausted; at least one of the end faces is provided with an air guide device, and the air guide device is provided with a guide bin with a substantial thickness in the direction perpendicular to the end face of the cabinet so as to ensure enough air is guided; the guide bin is provided with a first air guide port matched with the end face of the cabinet and a second air guide port connected with the air outside the cabinet; the air guide device is substantially sealed so as to be suitable for the air cooling of the cabinet, so that after passing through the second air guide port, the guide bin and the first air guide port, the air outside the cabinet is connected with an air path on the end face of the cabinet; and a part, opposite to the end face of the cabinet, of the air guide device is provided with a bin gate, and the bin gate is preferably made of transparent materials so as to facilitate operation and observation.

A plurality of human position discriminating regions each include at least two obstacle position discriminating regions. If a determination is made that an obstacle is present in an obstacle position discriminating region belonging to or positioned in front of a human position discriminating region where a determination has been made that a person is present, a first air current control is conducted in which horizontal wind direction changing blades swing within at least one obstacle position discriminating region belonging to the human position discriminating region where the determination has been made that the person is present, or a second air current control is conducted in which the horizontal wind direction changing blades swing within at least one obstacle position discriminating region belonging to the human position discriminating region where the determination has been made that the person is present or a human position discriminating region adjacent to such human position discriminating region, and in which a time period for fixing the horizontal wind direction changing blades is provided at each end of a swing motion of the horizontal wind direction changing blades.

The invention discloses an indoor unit of a duct air conditioner. The indoor unit comprises a shell, a cross-flow fan, a heat exchanger, sound absorbing layers, a first sound-absorbent partition, and a second sound-absorbent partition. The shell comprises a front board, a rear board, a top board, and a bottom board. The cross-flow fan, the heat exchanger, the sound absorbing layer, the first sound-absorbent partition and the second sound-absorbent partition are disposed in the shell. An air passage is formed between an air inlet and a lower return air hole. The cross-flow fan is disposed in the left air passage above the lower return air hole. The heat exchanger is disposed in the left air passage of the cross-flow fan. One sound absorbing layer is attached to the surface of the inner wall of a right top board of the cross-flow fan, and the first sound-absorbent partition is disposed on the inner wall of the top board on the upper left of the lower return air hole. The other sound absorbing layer is attached to the surface of the inner wall of a right bottom board of the cross-flow fan, and the second sound-absorbent partition is disposed on the inner wall of the bottom board adjacent to the left of the lower return air hole. The indoor unit in application has the advantages that air conditioner noise can be reduced, pressure loss of airflow in the air passage can be reduced and air conditioner efficiency can be improved.