Various embodiments are directed to use of RF and WiFi control in a fan device to control fan status and speed and/or fan light on/off status and intensity. A customer premises includes a WiFi router through which WiFi communications can be sent from a WiFi capable device, e.g., a cell phone, to control the fan device and its various functions. While WiFi control is via a WiFi router in the home, the control signals normally do not traverse the Internet or another external network. In addition to WiFi control, control of the fan device can be via an RF control device, e.g., a wall mounted controller. In some embodiments, the fan device reports its state and/or changes in state due to received commands to a server, and the server generates a recommended normal control schedule and an away control schedule and then uses the schedules to control fan device.

A fan fault detection device includes: a plurality of sub-modules; and a master module to configured to determine faults of a plurality of fans, wherein each of the plurality of sub-modules includes: a first input terminal for receiving a detection signal indicating whether a corresponding fan is defective; a second input terminal; an output terminal; a switching circuit connected between the output terminal and a first power source for supplying a voltage signal corresponding to a state signal and, the switching circuit configured to switch an output of the state signal through the output terminal according to the detection signal; and a first signal transmission circuit connected between the first input terminal and the switching circuit, the first signal transmission circuit configured to transmit the detection signal to the switching circuit according to a signal received by the second input terminal.

An air pump control system includes a first air pump and a second air pump for inflating or deflating an inflatable body; a switching driving device connected to the air pumps for driving the switching between two or more air passages; and an air pressure sensor for detecting an internal air pressure value of the inflatable body, and sending an internal pressure signal to a central control unit, which is connected to the air pumps, the switching driving device, and the air pressure sensor. The central control unit sends a driving signal to the switching driving device to activate the switching between the air passages, and sends an activation or deactivation signal to the air pumps according to the detected internal air pressure value and a pre-set inflating air pressure value, to activate or deactivate the air pumps. An air pump control method is also disclosed herein.

A high and low-pressure integrated air pump includes a single housing including an air inlet and an air outlet. A high-pressure pump is disposed within the housing and in fluid communication with the air inlet, and uses a first outlet passage to discharge to the air outlet. A low-pressure pump is also disposed within the housing and in fluid communication with the air inlet, and uses a second outlet passage to discharge to the air outlet.

A cooling device includes a cover, a trough connected to the cover, and a fan circulating air that is received from sides of the cooling device. The area above the fan is enclosed by the cover. The cooling device also includes a pump for delivering liquid to one or more pads located in the trough. The cooling device also includes a sensor that controls operating of the fan and the pump.

A centrifugal pump device has at least one impeller (16), a circulation connection between a delivery side (22) of the at least one impeller (16) and a suction side (20) of the at least one impeller (16), and a valve arrangement (30, 46) in said circulation connection (44, 54). The valve arrangement (30, 46) has a first valve mode providing a pressure dependent shut-off valve (46) in the circulation connection. The valve arrangement (30, 46) allows a change between the first valve mode and at least one further valve mode. The at least one further valve mode provides at least one fixed closing degree of the circulation connection (44, 54).

A power supply includes a casing; an AC-to-DC converter; an inverter electrically coupled to the AC-to-DC converter; a transformer having a primary side and a secondary side, wherein the inverter is electrically coupled to the primary side of the transformer; an output rectifier electrically coupled to the secondary side of the transformer; a fan, disposed in the casing and configured to remove heat from the casing generated by the AC-to-DC converter, the inverter and the output rectifier; and a fan controller configured to control when the fan is operational, wherein the fan controller is configured to execute a state machine that is configured to change states based at least on a dynamically adjustable counter.

The object of the disclosure is to prevent erroneous transition of an operation mode to an operation limitation mode. A control device 6 includes a controller 62. The controller 62 counts the number of times of occurrence of each of multiple types of abnormalities occurred in a vacuum pump 1, and issues a critical alarm in a case where the number of times of occurrence of each of the multiple types of abnormalities exceeds a predetermined threshold.

A variable speed pumping system coupled to a fluid circuit of an aquatic application is provided. The variable speed pumping system includes a pump having a motor, a variable speed drive in electrical communication with the motor, a pump housing designed to substantially enclose the motor and the variable speed drive, an onboard controller coupled to the variable speed drive, and an electrical communication assembly in communication with the onboard controller. The electrical communication assembly includes an IO expansion module. A plurality of pool pad devices is communicatively coupled to the onboard controller, and an external sensing device is communicatively coupled to the onboard controller. The onboard controller is configured to transmit instructions to control the plurality of pool pad devices, receive data from the external sensing device, and transmit the received data to one of a server or a remote user device.

A disclosed method of determining operating states of a fan uses a digital image of the fan and at least one operating parameter-specific algorithm. In a first stage, the method includes generating the digital image of the fan as a representation of the fan's properties, the representation based on one or more mathematical calculation models and optionally known data. The method further includes generating the at least one operating parameter-specific algorithm based on at least one of known relationships and characteristic curves, and calculating component states of the fan via the digital image, wherein the calculation of component states is based on virtual sensors. The method further includes generating a system behavior algorithm that calculates operating parameters of the fan based on the component states and optionally generates predictions relating to the operation of the fan.