Clutch control system for an air compressor

A device for the generation of compressed air comprising

• a first pressure line connected to the compressor;
• a series connection of a fluid conditioner and of a check valve connected at a first end to the first pressure line;
• a second pressure line connected to a second end of the series connection of fluid conditioner and check valve;
• a two-way valve connected to the first pressure line;
• a control output port connected to the two-way valve;
• a first directional control valve connected with one side to the control output port and with a second side to the second pressure line;
• a coupling connected to the compressor;
• a compressor drive connected for providing energy to the coupling;
• a control input disposed at the compressor drive for receiving control signals for the coupling;
• temperature-sensitive switching means connected on a first side to the control output port and connected on a second side to the control input.

A device for the generation of compressed air comprising

• a pressure line having an end connected to a user;
• a compressor connected to the pressure line for supplying air via a pressure line to the user;
• a pressure controller disposed in the pressure line, which pressure controller is capable of blocking a supply stream from the compressor to the user through a user-side pressure and of diverting said supply stream into the atmosphere upon reaching or, respectively, surpassing of a preset and defined pressure value;
• a switchable coupling connected to the compressor and by way of which the compressor can be separated from its drive;
• a switching means for connecting to the switchable coupling;
• a coupling control device connected to the switching means for controlling the switching means;
• a temperature sensor connected to the coupling control device for furnishing an ambient temperature-dependent signal;
• a pressure sensor communicating the pressure in the pressure line on its end toward the user and furnishing a pressure signal, derived from a pressure prevailing at the user side, wherein the temperature dependent signal and the pressure signal are fed to the coupling control device, wherein the coupling control device serves for combining the two signals such that the coupling separates the compressor from its drive in case the ambient temperature is above a preset temperature value and the user-side pressure is above a preset user-side pressure, wherein
• the switchable coupling is formed as a shut-off coupling, and wherein the coupling control device further comprises
• a directional control valve connected to the pneumatic control input, wherein the charging of the shut-off coupling with the user-side pressure is performed via the directional control valve;
• and
• a temperature-sensitive switching device, wherein the directional control valve is actuatable by the temperature-sensitive switching device.

A device for the generation of compressed air comprising

• a compressor which supplies air via a pressure line to a user;
• a pressure controller disposed in the pressure line, which pressure controller is capable of blocking a supply stream from the compressor to the user through a user-side pressure and of diverting said supply stream into the atmosphere upon reaching or, respectively, surpassing of a preset and defined pressure value;
• a switchable coupling, via which the compressor can be separated from its drive;
• a coupling control device, where the coupling control device is made up of the pressure controller, a directional control valve, a temperature-dependent switching device or, respectively, the pressure controller, a directional control valve, a temperature-dependent switching device or, respectively, the pressure controller, an electric pneumatically actuatable pressure switch, a temperature-dependent switching device, wherein the coupling control device is furnished for controlling switching means for a coupling, where a temperature-dependent signal and a signal, derived from a pressure prevailing at the user side, is fed to the coupling control device, wherein
• the coupling control device serves for joining the two signals such that the coupling separates the compressor from its drive in case the ambient temperature is above a preset temperature value and the user-side pressure is above a preset user-side pressure.

A method for controlling a generation of compressed air comprising

• setting a preset and defined pressure value to control a flow of a compressed air supply stream;
• setting a preset ambient temperature value;
• energizing a compressor connected to a pressure line for supplying air via a pressure line to the user;
• communicating the pressure in the pressure line on its end toward the user to a pressure sensor;
• deriving a pressure signal with the pressure sensor from a pressure prevailing at the user side;
• generating an ambient temperature-dependent signal with a temperature sensor connected to the coupling control device;
• feeding the temperature dependent signal and the pressure signal to the coupling control device;
• combining the pressure signal and the temperature signal in the coupling control device;
• separating the compressor from its drive via the combined signal from the coupling control device in case the ambient temperature is above the preset temperature value and the user-side pressure is above the preset user-side pressure.