84results about How to "Prevent bad situation" patented technology

The invention relates to an airflow downdraft preventing lampblack exhauster which consists of a shell that is provided with left and right wind suction orifices and a master air vent, as well as an electric control mechanism that comprises a power supply input plug, a smoke suction fan, an illuminating lamp and a switch; and is characterized in that an electric door closing device that consists of a ring-shaped shell with door spindle installation orifices, an open type door that is provided with a rigid door spindle and arranged inside the chamber of the ring-shaped shell by the symmetric door spindle installation orifices, as well as a speed reducing motor that can be controlled to drive the rotation of the open type door is connected with and arranged at the master air vent of the lampblack exhauster; an electric working loop of the electric control mechanism further comprises a cam contact switch, the speed reducing motor and a current relay; and by controlling the open type doorto rotate by 90 degrees so as to be opened to smoothly discharge lampblack gases, and further to rotate by 270 degrees so as to be closed, and separating airflow channels, the lampblack exhauster canhave outdoor airflow downdraft prevention function, thus having extremely strong practicability and wide market application prospect.

In a refrigerating system that has multiple systems of use-side heat exchangers (20, 30, 40) and one liquid-side connecting pipe (53, 54, 55) to connect the liquid pipes of multiple systems, the unused outdoor When the heat exchanger (15) performs heating operation with 100% heat recovery, even when the outdoor air temperature is low, the refrigerant flow in the refrigerant circuit (50) can be stabilized and the refrigeration capacity will not be reduced, and at the same time, it can prevent the malfunction of the device from causing 1 operation is stopped, therefore, the heat source side liquid pipe (62) and liquid receiver (17) of the outdoor unit (10) connected to the liquid side communication piping (53, 54, 55) A liquid refrigerant inflow passage (66) is connected to the inflow port of the liquid refrigerant inflow passage (66), and an on-off valve (SV1) capable of being opened and closed is provided on the liquid refrigerant inflow passage (66).

There is disclosed an electric box which can facilitate a connecting operation of electric-box-side coupler and lead-wire-side coupler while suppressing attachment of dust or the like to connecting portions between the couplers. In the electric box (39), electric components (45) are stored in an outer case (40), the electric box is connected to external lead wires (48), the electric box includes the electric-box-side coupler (47) detachably connected to the lead-wire-side coupler (49) attached to distal end of the lead wire (48), and a coupler receiving portion (44) constituted in the outer case (40), the electric-box-side coupler selectively has a received state in which the coupler (47) is positioned in the coupler receiving portion (44) and an exposed state in which the couplers are exposed from the coupler receiving portion (44), and the electric-box-side coupler (47) and the lead-wire-side coupler (49) connected to the electric-box-side coupler (47) are detachably received in the coupler receiving portion (44) in the received state.

An object is to inhibit a refrigerant leakage and enhance a performance of a compressor. The compressor comprises a driving element stored in a sealed container of the compressor, and a compression element driven by a rotary shaft of the driving element. This compression element comprises a cylinder in which a compression space is constituted; a suction port and a discharge port which communicate with the compression space in the cylinder; a compression member whose one surface crossing an axial direction of the rotary shaft is inclined continuously between a top dead center and a bottom dead center and which is rotatably disposed in the cylinder and which compresses a fluid (refrigerant) sucked from the suction port to discharge the fluid via the discharge port; and a vane which is disposed between the suction port and the discharge port to abut on an upper surface as one surface of the compression member and which partitions the compression space in the cylinder into a low pressure chamber and a high pressure chamber, and one surface of the compression member is disposed on a side opposite to the driving element.

An electric dust-collecting unit having improved dust collecting performance and thinned. The electric dust-collecting unit has needle-like electrodes (201) each having a sharp tip section (205) in the downstream direction, parallel electrodes (203) arranged in parallel to the needle-like electrodes (201), and open electrodes (204) provided on the downstream side, facing the sharp tip sections (205) of the needle-like electrodes (201). The parallel electrodes (203) and the open electrodes (204) are disposed in a substantially U shape so as to surround the needle-like electrodes (201). Discharge from the needle-like electrodes (201) to the opposite electrodes is made in many directions, which improves dust-collecting performance. Further, the needle-like electrodes (201) can be placed close to the open electrodes (204), so that the electric dust-collecting unit can be thinned.