A blower filter device (50) for a respirator system (1) has a filter unit (31) receiving an air filter (30) and a blower unit (65) drawing in the filtered air and generating discharged air. The blower unit has a blower (53) and a driving motor (54). An improved respirator system is provided with the
A blower filter device (50) for a respirator system (1) has a filter unit (31) receiving an air filter (30) and a blower unit (65) drawing in the filtered air and generating discharged air. The blower unit has a blower (53) and a driving motor (54). An improved respirator system is provided with the blower filter device having a pressure sensor (55) arranged in the discharged air measuring the pressure of the discharged air, a mass flow sensor (56) arranged in the discharged air measuring the mass flow of the discharged air, or a parameter-determining unit (59, 60) determining an operating parameter of the motor. A control unit (51, 52) determines the volume flow of the discharged air via the measured pressure, the measured mass flow or based on the operating parameter determined and sets the motor as a function of the volume flow determined.
대표청구항▼
1. A blower filter device for a respirator system, the blower filter device comprising: a filter unit for receiving a filter for filtering air;a blower unit for drawing in the filtered air and for generating discharged air, the blower unit comprising a blower and a motor for driving the blower and h
1. A blower filter device for a respirator system, the blower filter device comprising: a filter unit for receiving a filter for filtering air;a blower unit for drawing in the filtered air and for generating discharged air, the blower unit comprising a blower and a motor for driving the blower and having an outlet through which the discharged air flows;a pressure sensor arranged in the discharged air generated by the blower unit for measuring the pressure of the discharged air;a mass flow determination means for determining a mass flow of the discharged air; anda control unit for determining the volume flow of the discharged air based on the measured pressure and based on the determined mass flow and for setting the motor as a function of the volume flow determined. 2. A blower filter device in accordance with claim 1, wherein the mass flow determination means comprises a mass flow sensor arranged in the discharged air generated by, and downstream of, the blower unit for measuring the mass flow of the discharged air. 3. A blower filter device in accordance with claim 2, further comprises a temperature sensor arranged in the discharged air generated by the blower unit for measuring temperature of the discharged air wherein the control unit determines the volume flow of the discharged air based on the measured pressure, the measured temperature and the measured mass flow. 4. A blower filter device in accordance with claim 2, further comprising an air humidity sensor arranged in the discharged air generated by the blower unit for measuring humidity of the discharged air, wherein the control unit determines the volume flow of the discharged air based on the measured pressure, the measured air humidity and the measured mass flow. 5. A blower filter device in accordance with claim 2, further comprising: a temperature sensor arranged in the discharged air generated by the blower unit for measuring temperature of the discharged air; andan air humidity sensor arranged in the discharged air generated by the blower unit for measuring humidity of the discharged air, wherein the control unit determines the volume flow of the discharged air based on the measured pressure, based on the measured temperature, based on the measured air humidity and based on the measured mass flow. 6. A blower filter device in accordance with claim 1, wherein the mass flow determination means comprises a motor parameter-determining unit for determining an operating parameter of the motor, which operating parameter is a function of the mass flow of the discharged air. 7. A blower filter device in accordance with claim 6, further comprises a temperature sensor arranged in the discharged air generated by the blower unit for measuring temperature of the discharged air wherein the control unit determines the volume flow of the discharged air based on the measured pressure, the measured temperature and the operating parameter determined. 8. A blower filter device in accordance with claim 6, further comprising an air humidity sensor arranged in the discharged air generated by the blower unit for measuring humidity of the discharged air, wherein the control unit determines the volume flow of the discharged air based on the measured pressure, the measured air humidity and the operating parameter determined. 9. A blower filter device in accordance with claim 6, further comprising: a temperature sensor arranged in the discharged air generated by the blower unit for measuring temperature of the discharged air; andan air humidity sensor arranged in the discharged air generated by the blower unit for measuring humidity of the discharged air, wherein the control unit determines the volume flow of the discharged air based on the measured pressure, based on the measured temperature, based on the measured air humidity and based on the operating parameter determined. 10. A blower filter device in accordance with claim 6, wherein the operating parameter represents at least one of the speed and the electric current of the motor. 11. A blower filter device in accordance with claim 1, wherein the control unit sets the motor by increasing or decreasing the speed of the motor. 12. A blower filter device in accordance with claim 1, wherein: the blower unit is provided in a blower filter device housing and the pressure sensor measures the pressure of the discharged air within the blower filter device housing; andthe blower filter device housing is connected as a part of a powered air-purifying respirator system. 13. A respirator system comprising: a breathing mask;a hose; anda blower filter device connected to the breathing mask via the hose, the blower filter device comprising: a filter unit for receiving a filter for filtering air;a blower unit for drawing in the filtered air and for generating discharged air, the blower unit comprising a blower and a motor for driving the blower , the blower unit releasing the discharged air to the breathing mask via the hose;a pressure sensor arranged in the discharged air generated by the blower unit for measuring the pressure of the discharged air;a mass flow determination means for determining a mass flow of the discharged air; anda control unit for determining the volume flow of the discharged air based on the measured pressure and based on the determined mass flow and for setting the motor as a function of the volume flow determined. 14. A respirator system in accordance with claim 13, wherein the filter unit of the blower filter device has a filter for filtering air. 15. A respirator system in accordance with claim 13, wherein the mass flow determination means comprises a mass flow sensor arranged in the discharged air generated by, and downstream of, the blower unit for measuring the mass flow of the discharged air. 16. A respirator system in accordance with claim 13, wherein the mass flow determination means comprises a motor parameter-determining unit for determining an operating parameter of the motor which operating parameter provides an indication of the mass flow of the discharged air. 17. A method for operating a blower filter device, the method comprising the steps of: filtering air;drawing in the filtered air and generating discharged air through a blower unit, wherein the blower unit has a blower and a motor for driving the blower;measuring a pressure of the discharged air;determining a value corresponding to the mass flow by determining an operating parameter of the motor or by measuring the mass flow of the discharged air;determining a volume flow of the discharged air based on the measured pressure and based on the determined value corresponding to the mass flow; andsetting the motor as a function of the volume flow determined. 18. A method in accordance with claim 17, wherein the determined value corresponding to the mass flow is provided by one of a mass flow sensor arranged in the discharged air generated by the blower unit for measuring the mass flow of the discharged air and a motor parameter-determining unit for determining an operating parameter of the motor which operating parameter provides an indication of the mass flow of the discharged air. 19. A method in accordance with claim 18, further comprising the steps of: measuring at least one of a temperature and a humidity of the discharged air;determining volume flow of the discharged air based on the measured pressure, based on the measured mass flow, and based on at least one of the measured temperature and the measured air humidity. 20. A method in accordance with claim 18 further comprising the steps of: measuring at least one of a temperature and a humidity of the discharged air;determining volume flow of the discharged air based on the measured pressure, based on the operating parameter that represents at least one of a speed and an electric current of the motor, and based on at least one of the measured temperature and the measured air humidity.
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이 특허에 인용된 특허 (3)
Barton John Kenyon GB; Dion Charles Chewe Martin AU, Apparatus for supplying breathable gas.
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