In accordance with the inventive concepts, provided is a wearable device for personal thermal comfort. The device can take the form of a wearable fan comprising a U-shaped housing including a first arm having a central first axis and a second arm having a central second axis connected by an intermediate curved member. The device includes a first fan assembly disposed at a distal end of the first arm, comprising a fan, at least one air inlet, and least one air outlet directed off-axis from the first axis. The device can further include a second fan assembly disposed at a distal end of the second arm, comprising a fan, at least one air inlet, and least one air outlet directed off-axis from the second axis. The device can include a rear plate for cooling and/or heating. The device, in some embodiments, can be structured to be worn around a neck.

A grey water treatment system includes a first tank configured to receive grey water via a grey water supply conduit and that comprises an overflow, a second tank configured to store grey water, and at least one transfer conduit configured to at least transfer grey water between the first tank and the second tank. A control is configured to maintain a water level in said first tank sufficiently close to the overflow to allow floating contaminants to pass over the overflow. A method of treating grey water includes: receiving grey water in a first tank of a grey water treatment system; transferring grey water via at least one transfer conduit between the first tank and a second tank of said treatment system; and controlling a water level in said first tank sufficiently close to an overflow of said first tank to allow floating contaminants to pass over the overflow.

A grey water treatment system includes a first tank configured to receive grey water via a grey water supply conduit and that comprises an overflow, a second tank configured to store grey water, and at least one transfer conduit configured to at least transfer grey water between the first tank and the second tank. A control is configured to maintain a water level in said first tank sufficiently close to the overflow to allow floating contaminants to pass over the overflow. A method of treating grey water includes: receiving grey water in a first tank of a grey water treatment system; transferring grey water via at least one transfer conduit between the first tank and a second tank of said treatment system; and controlling a water level in said first tank sufficiently close to an overflow of said first tank to allow floating contaminants to pass over the overflow.

A fan assembly and associated methods are shown. Fan assemblies and methods include a fluid passage region defined between a fan motor and an outer housing. Example assemblies and methods include a number of hollow vanes located within the fluid passage region to permit an air flow between the fan motor and air external to the outer housing. In selected examples, fan motor cooling is facilitated using configurations described.

A ventilation system comprises a ventilation fan with a lamp and a ceiling which has an installation opening. The ventilation fan with the lamp is adapted for installing to the ceiling through the installation opening. The ventilation fan comprises a housing, a fan module, and a lamp module. The housing includes a top plate and a side wall which are connected with each other to form a first opening. The first opening is aligned with the installation opening. The fan module is disposed in the housing. The lamp module is disposed out of the installation opening. The lamp module and the housing are located at opposite sides of the installation opening of the ceiling. The lamp module includes a light source, a base, at least one optical component, a switch and a lamp cover. The optical component and the switch are disposed at the different sides of the base.

A compressor controller for operating a compressor within an industrial automation environment is provided. The compressor controller includes a control module, configured to control the compressor via control settings, and a machine learning module, coupled with the control module. The machine learning module is configured to receive a set of supervised data related to the compressor, and to train with the supervised data to produce a Newtonian physics model representing the inputs and outputs of the compressor within the industrial automation environment. The machine learning module is also configured to receive performance data related to the compressor, receive environment data related to the compressor, and to process the performance data and environment data to produce predicted future performance data for the compressor, and to produce control settings for the compressor.

In a blade of a propeller fan, a position on a chord line where the camber becomes maximum is set as a maximum camber position A, and a ratio of a distance d between a leading edge and the maximum camber position A to a chord length c is set as a maximum camber position ratio. The end portion on the hub side of the blade is set as a blade root, and the end portion on the outer circumferential side of the blade is set as a blade end. In the blade, the maximum camber position ratio monotonically increases in the direction from the reference blade cross section located between the blade root and the blade end toward the blade end and becomes maximum at the blade end. Thus, fan efficiency of the propeller fan is improved.

A vacuum pump includes a housing, a rotor cylindrical portion, and a stator cylindrical portion. The housing has an inlet port for sucking gas and an outlet port for discharging the sucked gas. The rotor cylindrical portion is housed in the housing. The stator cylindrical portion is housed in the housing, and is arranged to face the rotor cylindrical portion. A screw groove is formed on one of opposing surfaces of the stator cylindrical portion and the rotor cylindrical portion. The groove depth D of the screw groove is smaller at an end on an exhaust side than at an end on a suction side. The decrement of the groove depth D is greater on the suction side than on the exhaust side.

This disclosure relates to a light-emitting fan includes a fan frame, an impeller, and a light-emitting component. The fan frame includes a base, a first ring, and a second ring. The first ring is disposed on the base. The second ring is disposed on the first ring. The first ring is located between the base and the second ring, and the first ring and the second ring together form an accommodating space. The impeller is located in the accommodating space and rotatably disposed on the base. The light-emitting component is located in the first ring or the second ring. One of the first ring and the second ring is made of light-permeable plastic, the other one is made of light-impermeable plastic, and light from the light-emitting component is emitted through the first or second ring.

Provided are an internal and external dual-purpose air pump, an inflatable product and a lifting handle device; the internal and external dual-purpose air pump includes a machine core, including a housing having an accommodating chamber and an inflating device arranged in the accommodating chamber; the housing is provided with an air outlet and an air suction inlet respectively in the bottom and top ends, and the air outlet and the air suction inlet can both communicate with the accommodating chamber; and the housing is slidably connected with a buckling member, which can move relative to the housing, thereby the machine core is buckled into or detached from a product to be inflated through the buckling member; the inflating device works to send air flow out through the air outlet and/or suction air flow through the air suction inlet. The inflatable product includes the internal and external dual-purpose air pump.