摘要:
The present invention concerns a vacuum pumping system (1) comprising at least one vacuum pumping device (11; 31), including a vacuum pump (13; 33) and a local electronic control unit (15; 35) for monitoring and controlling the operating parameters of said pump, and a control station (51), remotely located relative to said at least one pumping device (11; 31) and equipped with a corresponding remote control unit (53); wherein said remote control unit (53) and said local control unit (15; 35) are equipped with wireless communication modules (27, 55; 47, 55) for communicating data and commands for controlling the operation of said at least one vacuum pumping device.
摘要:
A compressor (10) includes a motor protector (54) which stops the compressor's motor when it senses an out of specification condition. A diagnostic system (100) monitors the status of the motor protector (54). The diagnostic system (100) includes logic circuitry (104) that diagnoses the type of problem the compressor (10) is having based upon the running times and status of the motor in conjunction with the times and status of the motor protector (54).
摘要:
A conventional control system for an electrical heating or cooling apparatus has a thermostat 103 which controls a compressor 102 to cycle on and off. For peak load periods, a load shedding signal is sent out by the power company which controls a duty cycler 100 via a radio receiver 101. The duty cycler 100 sets reference ON and OFF times from the last thermostat cycle, and thereupon over-rides the thermostat by preventing the ON time of each cycle from exceeding, and the OFF time of each cycle from being less than, the reference ON and OFF times. To prevent tampering, the reference ON and OFF times may be restricted by preset maximum and minimum values respectively, and reset during a load shed period if the thermostat ON and OFF times fall short of or exceed the reference times respectively. Alternatively, the reference times may be taken from the last thermostat cycle whose times are within preset limits.
摘要:
A pump unit including a pump and an inverter drive, the inverter drive including a motor for driving the pump, a control unit for controlling the motor and a storage unit operatively connected to the control unit. The storage unit has stored therein a control program which determines the range of functions and/or the mode of functioning of the pump unit. The motor is controllable by the control unit depending on the control program. The pump unit includes a communication unit which is configured for establishing a contactless communication link with an external configuration device and that configuration data is transmittable, via the communication link, from the configuration device to the pump unit. The control program stored in the storage unit is modifiable for changing the range of functions and/or the mode of functioning of the pump unit depending on the configuration data transmitted.
摘要:
A compressor protection and control subsystem for a rotary compressor provides temperature pressure, mis-wiring and vibrational protection for the scroll machine. The vibrational protection comprises a vibration sensor which is integrated on the circuit board of the protection and control subsystem. The vibration sensor, in conjunction with at least one timer, monitors the vibrations of the scroll machine and will shut down the machine when excess vibrations are sensed over a prespecified period of time. The temperature system monitors operating temperature conditions the pressure system monitors operating pressures and the mis-wiring system monitors the power supplied to the compressor. Once an undesirable characteristic is identified, the operation of the scroll machine is stopped. These protection systems are integrated into a single subsystem which identifies the reason of shutting off the scroll machine in order to simplify repairs needed. The subsystem incorporates a gateway and/or a serial peripheral interface in order to communicate with a central operating and control system.