US2015240A - Thermally actuated pump - Google Patents

Thermally actuated pump Download PDF

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Publication number
US2015240A
US2015240A US726362A US72636234A US2015240A US 2015240 A US2015240 A US 2015240A US 726362 A US726362 A US 726362A US 72636234 A US72636234 A US 72636234A US 2015240 A US2015240 A US 2015240A
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US
United States
Prior art keywords
liquid
vapor
limb
generator
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US726362A
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English (en)
Inventor
Scott-Snell Edward
Gibson William Ross
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTERNAT OIL LAMP AND STOVE LT
INTERNATIONAL OIL LAMP AND STOVE Ltd
Original Assignee
INTERNAT OIL LAMP AND STOVE LT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by INTERNAT OIL LAMP AND STOVE LT filed Critical INTERNAT OIL LAMP AND STOVE LT
Application granted granted Critical
Publication of US2015240A publication Critical patent/US2015240A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
    • F04F1/02—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating
    • F04F1/04—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating generated by vaporising and condensing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B33/00—Boilers; Analysers; Rectifiers

Definitions

  • This invention relates to thermally actuated pumps of the. kind wherein cyclic pulsations are produced entailing the expulsion of vapor through a vapor outlet duct from liquid in a constantly heated envelope vapor generator accompanied by delivery of liquid displaced by such vapor past a non-return outlet valve' followed by the inspiration of liquid into a cool inlet duct past a non-return inlet valve.
  • the present invention takes account of this physical phenomenon and provides for the heating of only a small portion of the liquid to produce the necessary quantity of vapor, this being achieved by subdividing the generator cylinder l5 into a heated and an unheated portion.
  • the vapor generator we subdivide the vapor generator into a heated and an unheated portion, these portions being connected together in paral- 20 lel by way of unrestricted conduits, theY heated portion being of small volumetric capacity but having a large heating surface, and we provide means ensuring that a considerable cooling of the system is effected at each stroke. 25
  • Figure 1 illustrates one convenient arrange- 40 ment of pump embodying the present invention.
  • Figure 2 illustrates a modified arrangement
  • the limb b is connected at its upper and lower ends with a receptacle f of small volumetric capacity constituting a generator proper to which heat is continuously applied and an inlet connection g including a non-return inlet valve h is made to the U-shaped tube in a section between a and b preferably the lower position available.
  • the reduction of pressure producing the ultimate opening of the inlet valve at each stroke may be produced by reabsorption of the gas.
  • Vproper connected to the limb b but provide the lower connection :i between the generator f and the limb b with an upturned end, the arrangement being such that when liquid moves upwards past this upturned endY (within the limb b of the U- shaped tube) an ejector action is produced which prevents liquid from entering the lower end of the generator proper f as long as the liquid is in motion.
  • this device is similar to that described above in that access of liquid to the generator proper f is delayed pending a reduction in pressure to a suflicient extent to initiate the intake stroke following thereon owing to there being nothing but vapor in this lower connection k until all vapor has been transferred from the limb b to the condenser section at a, i. e. b can fill completely before any liquid can reach f.
  • the inlet connection m to the device instead of being made to the U-shaped tube itself is made to an auxiliary receptacle n connected at its upper and lower ends with the longer limb a of the U-shaped tube in the region of the outlet valve c, this auxiliary receptacley containing at its upper end the depending and preferably enlarged end o of the tube e leading from the lower end of the downwardly projecting extension from the limb b of the U-shaped tube.
  • the depending tube o within the auxiliary receptable n constitutes a comparatively inefficient condenser and consequently vapor or gas tends to remain momentarily uncondensed therein, thus permitting of a Ymore violent hydraulic swing in the first instance and subsequently tending to prevent any liquid from finding its way down the tube e (and thus feeding the generator) until the whole system is completely filled with liquid.
  • the heated receptacle In applying the invention to pumps for pumping oil, such, for example, as paraffin, it is preferred that in no circumstances the heated receptacle shall boil completely dry since such action tends to produce the formation of solid deposits within the heated receptacle.
  • the liquid inlet connection is made in injector form at q so as to tend to promote circulation in the U tube in a direction down the limb a thus to counteract any tendency for liquid to be drawn down the tube e (and thus to cause premature regeneration of vapor).
  • a thermally actuated pump of the kind indicated including a generator comprising a heated portion having aconsiderable heating surface but small volumetric capacity and an unheated portion, unrestricted conduits between said portions, acool-inlet duct, an outlet duct for pumped liquid, a connection from one end of the unheated portion to said duct, a Vapor outlet duct and a connection therefrom to the other end of said coolinlet duct whereby a progressive though intermittent :forward movement of liquid is produced in said unheated portion.
  • a thermally actuated pump as claimed in claim 1 including also means controlled by a hydraulic swing effecting delay in access of liquid to the said heated portion of the generator thereby enabling the internal pressure in the boiler to drop below that of the liquid supply source.
  • a thermally actuated pump as claimed in claim 1 including means controlled by a hydraulic swing comprising an injector through which the liquid is caused to pass upon occurrence of the hydraulic swing thereby effecting delay in access of liquid to the generator thereby enabling the internal pressure in the generator to drop below that of the liquid supply source.
  • a thermally actuated pump as claimed in claim 1 including also means controlled by a hydraulic swing comprising a connection from the heated portion tothe vapor outlet duct at the region of the junction between the latter and the unheated portion.
  • a thermally actuated pump as claimed in claim 1 including also means controlled by a hydraulic swing comprising a connection from the heated portion to the vapor outlet duct at the region of the junction between the latter and the unheated portion together with means comprising a downward extension of the upper end of the said vapor outlet tube serving as an ineicient condenser.
  • a thermally actuated pump as claimed in claim 1 including also means controlled by a hydraulic swing comprising an injector disposed in the cool liquid inlet duct.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Reciprocating Pumps (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Spray-Type Burners (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
US726362A 1933-07-11 1934-05-18 Thermally actuated pump Expired - Lifetime US2015240A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19678/33A GB417217A (en) 1933-07-11 1933-07-11 Improvements in or relating to thermally actuated pumps

Publications (1)

Publication Number Publication Date
US2015240A true US2015240A (en) 1935-09-24

Family

ID=10133360

Family Applications (1)

Application Number Title Priority Date Filing Date
US726362A Expired - Lifetime US2015240A (en) 1933-07-11 1934-05-18 Thermally actuated pump

Country Status (3)

Country Link
US (1) US2015240A (enrdf_load_stackoverflow)
DE (1) DE623567C (enrdf_load_stackoverflow)
GB (1) GB417217A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553817A (en) * 1948-09-01 1951-05-22 Jet Heet Inc Thermally actuated pump
US2688922A (en) * 1951-10-27 1954-09-14 Filiberto A Bonaventura Solar energy pump
US2744470A (en) * 1952-07-05 1956-05-08 Jet Heet Inc Thermopump
US2757618A (en) * 1952-09-26 1956-08-07 Jet Heet Inc Thermopump
US2910119A (en) * 1954-09-21 1959-10-27 Separator Ab Heat operated pumping system
US3053198A (en) * 1958-02-21 1962-09-11 Midland Ross Corp Thermopump system
US3073257A (en) * 1957-03-28 1963-01-15 Jet Heet Inc Heat actuated pumps
US3112792A (en) * 1952-09-13 1963-12-03 Jet Heet Inc Personal thermal device
US3139837A (en) * 1959-10-14 1964-07-07 Yissar Levi Fluid piston engine and method of operating same
US4451210A (en) * 1982-05-14 1984-05-29 Thermacore, Inc. Diaphragm vapor pump

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553817A (en) * 1948-09-01 1951-05-22 Jet Heet Inc Thermally actuated pump
US2688922A (en) * 1951-10-27 1954-09-14 Filiberto A Bonaventura Solar energy pump
US2744470A (en) * 1952-07-05 1956-05-08 Jet Heet Inc Thermopump
US3112792A (en) * 1952-09-13 1963-12-03 Jet Heet Inc Personal thermal device
US2757618A (en) * 1952-09-26 1956-08-07 Jet Heet Inc Thermopump
US2910119A (en) * 1954-09-21 1959-10-27 Separator Ab Heat operated pumping system
US3073257A (en) * 1957-03-28 1963-01-15 Jet Heet Inc Heat actuated pumps
US3053198A (en) * 1958-02-21 1962-09-11 Midland Ross Corp Thermopump system
US3139837A (en) * 1959-10-14 1964-07-07 Yissar Levi Fluid piston engine and method of operating same
US4451210A (en) * 1982-05-14 1984-05-29 Thermacore, Inc. Diaphragm vapor pump

Also Published As

Publication number Publication date
DE623567C (enrdf_load_stackoverflow) 1935-12-28
GB417217A (en) 1934-10-01

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