A method can include receiving, at a control module, first pump characteristic data from a data source associated with a pump, sensing second pump characteristic data from a flow system using one or more sensors, comparing the first pump characteristic data to the second pump characteristic data sensed in the flow system, and determining a health of the pump based on the comparison of the first pump characteristic data to the second pump characteristic data.

The disclosure discloses a method and a device for controlling cylinder switching of a compressor, a unit and an air conditioning system. The method includes: determining whether the compressor needs to perform cylinder switching; if so, adjusting current operating frequency according to a system pressure difference so that both the adjusted operating frequency and the system pressure difference meet a cylinder switching condition of the compressor; and controlling the compressor to perform cylinder switching. At the moment, the system pressure difference and the operation frequency are stable, and would not interfere the compressor's maintaining of the single-cylinder or double-cylinder operation state, which guarantees the energy efficiency of the unit where the compressor is located, and improves the use experience of a user.

A dynamic compressor control is provided. The dynamic compressor control includes sensors to sense operating parameters of a compressor and a compressor analytic software package. The compressor analytic software package uses the sensed operating parameters of the compressor to generate key performance indicators. The key performance indicators are used to calculate process variables for the compressor. The dynamic compressor control uses the sensed operating parameters and the process variables calculated from the key performance indicators to provide operating alarms and/or shutdowns.

Provided is a pump apparatus capable of suppressing an unintentional ejection of a high-pressure liquid from a nozzle. A pump apparatus including: an injection chamber having a door; a nozzle arranged in the injection chamber; a pump connected to the nozzle for discharging liquid; a motor for driving the pump; a door sensor for detecting that the door is closed; and a control device capable of communicating with the door sensor, the control device having a motor rotation unit for supplying driving power to the motor only when the door sensor detects that the door is closed.

A pump leak protection system includes a fluid sensor, which alerts of a leak and/or stops a pump from operating upon detection of fluid outside a pump chamber. Thus, potential damage due to leakage of fluid through the pump chamber and/or damaged diaphragm may be mitigated or prevented.

A service module for troubleshooting a pumping unit, particularly that used in the oil/gas industry, is operatively coupled between a motor of the pumping unit and a high pressure shutoff sensor which acts to kill the motor of the pumping unit in the event a pressure of the pipeline exceeds a prescribed threshold. The service module is operable in a first normal operating mode in which the shutoff sensor acts as it normally would to shut off the motor when the prescribed threshold is exceeded, and in a second troubleshooting mode where the normal operation of the shutoff sensor is bypassed for a predetermined period of time. After the predetermined period of time of the second troubleshooting mode has elapsed, the service module automatically returns to the normal operating mode. The shutoff sensor thus remains operatively coupled to the motor during troubleshooting of the motor.

A dynamic compressor control is provided. The dynamic compressor control includes sensors to sense operating parameters of a compressor and a compressor analytic software package. The compressor analytic software package uses the sensed operating parameters of the compressor to generate key performance indicators. The key performance indicators are used to calculate process variables for the compressor. The dynamic compressor control uses the sensed operating parameters and the process variables calculated from the key performance indicators to provide operating alarms and/or shutdowns.

A system is presented that monitors the condition of a plurality of pumps in a system of pumps using a remote telemetry unit (RTU) associated with each pump. The RTUs have a sensor configured to detect when a power failure occurs and a power backup system that includes at least one capacitor that is configured to power the RTU in response to a power failure long enough for the RTU to transmit a power failure signal to a computer system that monitors the status of the pumps. The computer system initiates a delay timer in response to receiving a power failure signal and transmits a power failure signal to a technician if a power up signal is not received within the time set by the delay timer. Using capacitors instead of batteries allows the RTU to be sealed within a container and/or a potting compound.

Design solutions to mitigate the following four fatal flaws in the conventional pump system design; namely, (1) surprise pump-failure in single pump designs that can result in costly water damage; (2) the threat of fatal high voltage electrocution due to flooding; (3) grid power outage and no energy supply to support the needed pumping power that results in water damage; (4) foil odor from the standing water in the well after a period of low seeping rate with or without activated pumping. The principles described herein can completely mitigate the above four fatal design issues.

The present invention relates to diaphragm pump (1) having a delivery chamber (3) and a working chamber (5), wherein the working chamber can be or is filled with a hydraulic fluid and is operatively connected to a pressure generating device in order to apply an oscillating pressure to the hydraulic fluid, further comprising a diaphragm (11) having at least one diaphragm layer (13) and a diaphragm core (15), which separates the delivery chamber (3) and the working chamber (5) from each other, wherein the diaphragm (11) is or can be operatively connected to a diaphragm return device (17) comprising a pull rod (19), which applies or can apply a return force on the diaphragm (11) in the direction of the suction stroke position, and further comprising a storage chamber (21) for holding the hydraulic fluid, and wherein the working chamber (5) and the storage chamber (21) are connected to each other by means of a return flow channel (25) closed by means of a closure element (23, 23), and wherein the closure element (23, 23) is operatively connected to the diaphragm core (15) and the diaphragm return device (17), so that the return force and a pressure force counteracting the return force as a result of the fluid pressure in the working chamber (5) act on the closure element (23, 23), and wherein, when a predetermined triggering force is exceeded as a sum of the return force and the pressure force on the closure element (23, 23), the return flow channel (25) is opened.