A vapor pressure pump for delivering a liquid into a system operating at a higher pressure or located at a higher level by action of a vapor pressure produced from a portion of the liquid to be delivered. The pump comprises a closed reservoir for liquid, which includes an unidirectional liquid inlet
A vapor pressure pump for delivering a liquid into a system operating at a higher pressure or located at a higher level by action of a vapor pressure produced from a portion of the liquid to be delivered. The pump comprises a closed reservoir for liquid, which includes an unidirectional liquid inlet, an unidirectional liquid outlet, a vapor exhaust valve adapted to balance the pressure between the unidirectional liquid inlet and the reservoir during its filling. The pump also comprises a vapor generator for producing vapor inside the reservoir at a pressure sufficient to force out the liquid contained therein through the liquid outlet, and a control device for operating the vapor generator only when the liquid fed by the liquid inlet has reached a predetermined level in the reservoir. According to the invention, the vapor generator comprises an evaporation chamber in vapor communication with the closed reservoir, and a device responsive to the control device for sampling a portion of the liquid contained in the reservoir when the liquid in the reservoir has reached the predetermined value, and for supplying the sampled liquid into the evaporation chamber. The vapor generator also comprises a heating system for evaporating the sampled liquid supplied into the evaporation chamber to produce the pressure vapor required to force the liquid out of the reservoir.
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1. A vapor pressure pump for delivering a liquid into a system operating at a higher pressure or located at a higher level by action of a vapor pressure produced from a portion of said liquid to be delivered, said pump comprising: an outer closed reservoir provided with an unidirectional liquid i
1. A vapor pressure pump for delivering a liquid into a system operating at a higher pressure or located at a higher level by action of a vapor pressure produced from a portion of said liquid to be delivered, said pump comprising: an outer closed reservoir provided with an unidirectional liquid inlet through which a liquid may flow by gravity, an unidirectional liquid outlet and a vapor exhaust valve adapted to balance the pressure between the unidirectional liquid inlet and the outer reservoir; an inner, upwardly opened reservoir located inside the closed reservoir for receiving the liquid entering the closed reservoir through the liquid inlet, said inner reservoir being in liquid communication with the liquid outlet; means for producing vapor inside the outer reservoir at a pressure sufficient to force out the liquid contained in said inner reservoir through the liquid outlet, said vapor producing means comprising an evaporation chamber in vapor communication with said closed reservoir, said evaporation chamber being defined between the walls of said inner and outer reservoirs; control means for operating said vapor producing means only when the liquid fed by the liquid inlet has reached a predetermined level into the inner reservoir; means responsive to said control means for sampling a portion of the liquid contained in the inner reservoir when said liquid in said inner reservoir has reached the predetermined level, and for supplying said sampled liquid into said evaporation chamber; and heating means for evaporating said sampled liquid supplied to the evaporation chamber to produce the vapor pressure required to force the liquid out of the reservoir. 2. The vapor pressure pump of claim 1, wherein said control means comprises a float and said sampling means comprises a first obturator operated by said float for intermittently opening a liquid discharge aperture provided in a wall of said inner reservoir, said aperture being sized and positioned to allow a portion of the liquid to escape by gravity from said inner reservoir to said evaporation chamber to produce the necessary vapor pressure. 3. The vapor pressure pump of claim 2, wherein the liquid to be pumped is a condensed vapor collected at the bottom of a heat exchanger. 4. The vapor pressure pump of claim 2, wherein said vapor exhaust valve includes an aperture and a second obturator which is actuated in counteraction to the actuation of the liquid discharge aperture by the operation of said float. 5. The vapor pressure pump of claim 4, wherein said first and second obturators are provided at the ends of a vertically extending stem passing through the float, said stem having such a length that the closure of the aperture of the vapor exhaust valve by the second obturator occurs simultaneously with the opening of the discharge aperture by the first obturator, and vice versa. 6. The vapor pressure pump of claim 5, wherein said first and second obturators each consist of a seat-engaging surface. 7. The vapor pressure pump of claim 2, wherein the inner reservoir is located inside the closed reservoir in coaxial position with respect thereto. 8. The vapor pressure pump of claim 7, wherein said liquid discharge aperture is provided at the bottom wall of said inner reservoir. 9. The vapor pressure pump of claim 8, wherein said closed reservoir is made of a heat-conductive material and said other reservoir is made of a heat-insulating material. 10. The vapor pressure pump of claim 9, wherein said float is made of a heat-insulating material for thermally insulating the liquid surface in said inner reservoir. 11. The vapor pressure pump of claim 8, wherein said heating means consists of a continuously operating sleeve extending all around the outer wall of said closed reservoir. 12. The vapor pressure pump of claim 11, wherein said heating sleeve is controlled by a thermostat. 13. The vapor pressure pump of claim 1, wherein said control means comprises a self-priming siphon positioned between the inner reservoir and the evaporation chamber in such a manner that it becomes operative when the level of the liquid in said inner reservoir has reached its predetermined level. 14. The vapor pressure pump of claim 13, wherein the liquid to be pumped is a condensed vapor collected at the bottom of a heat exchanger. 15. The vapor pressure pump of claim 13, wherein said vapor exhaust valve includes an aperture and an obturator which is actuated in counteraction to the actuation of the siphon by the operation of a float. 16. The vapor pressure pump of claim 15, wherein said obturator is provided at one end of a vertically extending stem passing through the float. 17. The vapor pressure pump of claim 16, wherein said obturator consists of a seat-engaging surface. 18. The vapor pressure pump of claim 15, wherein said inner reservoir is located inside the closed reservoir in coaxial position with respect thereto. 19. The vapor pressure pump of claim 18, wherein said closed reservoir is made of a heat-conductive material and said other reservoir is made of a heat-insulating material. 20. The vapor pressure pump of claim 19, wherein said float is made of a heat-insulating material for thermally insulating the liquid surface in said inner reservoir. 21. The vapor pressure pump of claim 20, wherein said heating means consists of a continuously operating heating sleeve extending all around the outer wall of said closed reservoir. 22. The vapor pressure pump of claim 21, wherein said heating sleeve is controlled by a thermostat.
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이 특허에 인용된 특허 (4)
Weber Robert L. (New Canaan CT), Coffee brewing apparatus and method.
Regamey Pierre E. (35 ; Le Calabert 69130 Ecully FRX), Method and device for feeding a system for generating and distributing vapor condensable into make-up liquid.
Bernier Jean Paul (Rte. de la Sainte Baume-Quartier de Vede 13390 Auriol FRX), Process and devices for causing a heat carrier fluid to circulate in a closed circuit comprising a hot source and a cold.
Fletcher James C. Administrator of the National Aeronautics and Space Administration ; with respect to an invention of ( Monterey Park CA) Kirsten Charles C. (Monterey Park CA), Solar-powered pump.
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