Abstract: A zonal bolt-grouting support device and method for cataclastic rock mass large deformation of a high-stress tunnel, the method includes: drill holes in surrounding rock of a tunnel against a tunnel face after rock mass excavation, install high-strength prestressed anchor members, apply a preload to anchor bolts when expansion anchoring agent is fully expanded and has a certain strength, and zonally grout the surrounding rock after stress adjustment. The high-strength prestressed anchor member comprises an anchor bolt, an expansion anchor agent, a decoupling material, a grouting device, a reverse anti-skid device, etc. The grouting device consists of a shallow grouting steel pipe, a deep grouting steel pipe and a grouting stop valve, and the grouting steel pipe is arranged side by side with the anchor bolt in a drill hole. The technical proposal of the invention effectively inhibits the large deformation of a cataclastic rock mass.

Abstract: A high-voltage permanent magnet frequency conversion all-in-one machine according to an embodiment of the present disclosure includes a frequency converter configured to perform frequency conversion on a high-voltage alternating current, and output at least three alternating currents, a permanent magnet motor configured to receive the alternating currents subjected to the frequency conversion and output from the frequency converter, to drive the motor to operate, and a controller configured to control the frequency converter to perform the frequency conversion on the high-voltage alternating current, and control an operation state of the permanent magnet motor.

Abstract: Disclosed are a vapour-liquid filter mesh, a heat exchanger and an air conditioner. The vapour-liquid filter mesh includes a first area located in the middle and a second area located at the periphery of the first area, and the thickness of the second area is greater than the thickness of the first area.

Abstract: Some embodiments of the present disclosure provide an air conditioner oil separator, a condenser, and an air conditioner. The air conditioner oil separator includes: a gas inlet for introducing a refrigerant to be separated, a gas outlet for outputting a separated refrigerant, and a filter component disposed at the gas outlet. The filter component includes: a first filter area; a second filter area, which is closer to the gas inlet than the first filter area; and a third filter area, which is closer to the gas inlet than the second filter region. A separation efficiency of the first filter area for the refrigerant is lower than a separation efficiency of the second filter area for the refrigerant; and/or, a refrigerant separation efficiency of the third filter area for the refrigerant is lower than the separation efficiency of the second filter area for the refrigerant.

Abstract: Disclosed are a vapour-liquid filter mesh, a heat exchanger and an air conditioner. The vapour-liquid filter mesh includes a first area located in the middle and a second area located at the periphery of the first area, and the thickness of the second area is greater than the thickness of the first area.