Portable vacuum generation device, and medical suction device using same

A portable vacuum generator comprising:

• a vacuum pump having a motor for generating negative pressure according to driving of the motor;
• a pressure sensor for sensing pressure applied to the vacuum pump;
• a controller that generates a first control signal for blocking a power supply for a pump driving motor until pressure of the pump falls down to the preset minimum pressure in the case that the current pressure reaches the preset maximum pressure in response to the current pressure that is detected by the pressure sensor and applied to the vacuum pump, and that generates a second control signal for driving the pump driving motor until the current pressure reaches the preset maximum pressure in the case that the current pressure falls down to the preset minimum pressure;
• a first relay that is connected to an output end of the controller and is activated in response to the first control signal of the controller and is deactivated in response to the second control signal;
• and
• a second relay that is linked to the first relay and operates in a complimentary form, and that is deactivated when the first relay is activated to thus block the power supply for the pump driving motor, and is activated when the first relay is deactivated to thus resume the power supply for the pump driving motor.