US3590859A - Expansion valve - Google Patents

Expansion valve Download PDF

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Publication number
US3590859A
US3590859A US799299A US3590859DA US3590859A US 3590859 A US3590859 A US 3590859A US 799299 A US799299 A US 799299A US 3590859D A US3590859D A US 3590859DA US 3590859 A US3590859 A US 3590859A
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US
United States
Prior art keywords
valve
chamber
membrane
pin
bore
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
US799299A
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English (en)
Inventor
Rudibert Gotzenberger
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.)
Individual
Original Assignee
Individual
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.)
Filing date
Publication date
Priority claimed from DE19681675505 external-priority patent/DE1675505B1/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3590859A publication Critical patent/US3590859A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1266—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being acted upon by the circulating fluid
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/33—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant
    • F25B41/335—Expansion valves with the valve member being actuated by the fluid pressure, e.g. by the pressure of the refrigerant via diaphragms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7782—With manual or external control for line valve

Definitions

  • An expansion valve for controlling the flow of a fluid medium and being connected to a pressure-generating sensor has a valve housing defining a valve chamber and a valve head with a membrane therein reacting to the pressure coming from said sensor
  • a valve pin, connecting the membrane with the valve body of the valve for joint movement therewith has a bore connecting the outlet end of the valve with an inner membrane chamber.
  • the valve pin passes through a packing located between the inner membrane chamber and the valve chamber for preventing a flow of the medium from the valve chamber into the inner membrane chamber.
  • valves and especially to expansion valves of a construction in which a valve pin is used for operation of the valve body and wherein the valve pin is operated by a membrane located in a membrane chamber which is divided by the membrane into an outer membrane chamber and an inner membrane chamber.
  • the outer membrane chamber and the inner membrane chamber of this type of valve are airtight in relation to each other.
  • the outer membrane chamber is connected with a pressure-generating sensor whereas the inner membrane chamberis connected to the medium which passes through the valve.
  • the flow of the medium through such an expansion valve is regulated by the movement of the pressure-operated membrane which opens and closes the valve transmitting its movements to the valve body with the help of the valve pin.
  • the movement of the membrane or its position in the membrane chamber is determined by the control pressure exerted against the membrane in the outer membrane chamber and the pressure of the medium in the inner membrane chamber of the expansion valve.
  • the medium enters the valve in a liquid state just below its boiling point.
  • the liquid medium expands and at the same time cools off and changes at least partially into a gaseous state in the evaporator.
  • the principal object of the invention is to provide a new expansion valve which will operate satisfactorily in any position. This is achieved in an expansion valve according to the invention by locating the valve pin in a packing which will seal the membrane chamber against the medium flowing through the expansion valve. At the same time a connection is provided between the inner membrane chamber and the low-pressure end of the expansion valve through a bore in the valve pin.
  • the membrane which is sensitive to temperature differences is protection from contact with a comparatively warmer cooling medium.
  • the necessary pressure connection between the medium and the inner membrane chamber is now provided from the low-pressure end of the valve via a bore in the valve pin and suitable openings connecting the bore with the surface of the pin. No cooling medium in liquid form can now reach the inner chamber, as any liquid cooling medium evaporates immediately in the bore of the valve pin.
  • the cooling medium flowing from the high-pressure end into the expansion valve and thus having a comparatively higher temperature is in contact with at least a part of the pin. Consequently the pin has a higher temperature than the temperature of the cooling medium at the low-pressure end.
  • this type of expansion valve is arranged in such a way that the stream of the expanded cooling medium cannot be directed against the control head of the valve.
  • the construction of the expansion valve provides for a longitudinal inlet branch leading into a longitudinally extending valve chamber whose axis is substantially normal to the axis of the inlet branch.
  • the packing of the valve pin provides an airtight insulation between the valve chamber and the inner membrane chamber.
  • the valve body movable, in relation to a valve seat, between an open and a closed position regulates the flow of a cooling medium from the valve chamber into a longitudinal outlet branch whose axis is substantially normal to the axis of the valve chamber.
  • FIG. I is a partially cross-sectional view of a valve according to the invention.
  • FIG. 2 is a side elevation of the valve of FIG. 1 as seen from the left side of FIG. 1.
  • FIG. I shows an expansion valve having a valve housing A with an elongated inlet branch 1 and an elongated outlet branch 14.
  • Valve chamber 2 having an axis substantially normal to the axes of the inlet branch 1 and the outlet branch 14, is formed within the valve housing. Valve chamber 2 is connected to a bore in the inlet branch to receive a cooling medium flowing through said inlet branch.
  • valve body 3 cooperating with a valve seat 4 formed on one end of the valve chamber 2 is movable between an open and a closed position.
  • Valve chamber 2 is also connected to the outlet 11 leading into a bore of the outlet branch when the valve body 3 is in its open position, permitting the flow of the cooling medium from the valve chamber 2 into the bore of the outlet branch 14 and into the evaporator 15 shown only schematically in the drawing.
  • a valve pin 7 having a narrow axial bore 10 is firmly attached on one end of the valve body 3 and on its other end to a membrane 8 located in a membrane chamber 6.
  • the membrane chamber is defined by the inner walls of a valve head B.
  • the membrane 8 having a center piece 8a divides the membrane chamber 6 into an outer membrane chamber 6a and an inner membrane chamber 6b, the two chambers being pressuretight in relation to each other.
  • the outer membrane chamber 60 is connected by conduit 9 with a pressuregenerating sensor not shown in the drawing.
  • the inner membrane chamber 6b is connected through the bore 10 and a side opening 10a in valve pin 7 with the outlet end 11 ofthe valve.
  • a spring 12 adjustable by adjusting screw 13 urges the valve body 3 upwardly into close contact with the valve seat 4 and thus keeps the valve in a closed position until the pressure exerted against the membrane 8 overcomes the pressure of the spring 12 and lifts the valve body 3 from its valve seat 4.
  • the cooling medium which enters the inlet branch in a liquid state or in a state close to the point of condensation flows from the inlet branch 1 through the valve chamber 2, and the open valve seat 4 and reaches in an expanded state the outlet branch 14 and therethrough the evaporator 15.
  • the necessary pressure in the inner membrane chamber 6! is obtained through the bore and opening 10a in the valve pin 7 and through a bore in the valve body 3 connecting to bore 10, which transmits pressure of the medium from the outlet end of the valve to the inner membrane chamber 6b.
  • An expansion valve comprising a valve housing having an inlet branch and an outlet branch said inlet branch including an elongated valve chamber; a valve head defining a membrane chamber therein; a membrane located in said membrane chamber and dividing said chamber into an outer and an inner membrane chamber, said outer and said inner membrane chambers being pressuretight relative to each other, said outer membrane chamber being arranged for connection to means for applying pressure to said outer membrane chamber; a valve body and a valve seat located on one end of said elongated valvechamber remote from said valve head, said valve body being movable between an open and a closed position with regard to said valve seat; a valve pin firmly connected on one end to said valve body, extending through said elongated valve chamber, and arranged at the other end to be engaged by said membrane for transmitting movement of the membrane to said valve body, said valve pin having a narrow bore axially therethrough and said valve body having a bore connecting to said bore of said valve pin; a packing located on the other end of said elongated valve chamber close to said inner
  • valve chamber is so arranged that the fluid medium flowing from the inlet branch into said valve chamber is in contact with said valve pin, for thermal transfer.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Temperature-Responsive Valves (AREA)
  • Control Of Fluid Pressure (AREA)
US799299A 1968-02-24 1969-02-14 Expansion valve Expired - Lifetime US3590859A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681675505 DE1675505B1 (de) 1968-02-24 1968-02-24 Expansionsventil

Publications (1)

Publication Number Publication Date
US3590859A true US3590859A (en) 1971-07-06

Family

ID=5686707

Family Applications (1)

Application Number Title Priority Date Filing Date
US799299A Expired - Lifetime US3590859A (en) 1968-02-24 1969-02-14 Expansion valve

Country Status (4)

Country Link
US (1) US3590859A (en, 2012)
JP (1) JPS5025180B1 (en, 2012)
BR (1) BR6906496D0 (en, 2012)
GB (1) GB1264174A (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544328A (en) * 1982-10-05 1985-10-01 The Coca-Cola Company Sold-out device for syrup pump
US4752445A (en) * 1985-08-20 1988-06-21 American Sterilizer Company Bi-directional sealing method to control fluid flow between an air inlet and a pressure chamber
US4864915A (en) * 1988-06-13 1989-09-12 General Motors Corporation Vacuum operated actuator
US20180074527A1 (en) * 2015-05-06 2018-03-15 Mann+Hummel Gmbh Unit for Regulating and Controlling a Fluid Pressure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594701A (en) * 1948-03-10 1952-04-29 Refrigerator Components Ltd Expansion valve for use in refrigerating and like apparatus
US2982294A (en) * 1958-10-17 1961-05-02 Clary Corp Control valve
US3021108A (en) * 1957-04-12 1962-02-13 American Radiator & Standard Refrigerant expansion valves

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594701A (en) * 1948-03-10 1952-04-29 Refrigerator Components Ltd Expansion valve for use in refrigerating and like apparatus
US3021108A (en) * 1957-04-12 1962-02-13 American Radiator & Standard Refrigerant expansion valves
US2982294A (en) * 1958-10-17 1961-05-02 Clary Corp Control valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544328A (en) * 1982-10-05 1985-10-01 The Coca-Cola Company Sold-out device for syrup pump
US4752445A (en) * 1985-08-20 1988-06-21 American Sterilizer Company Bi-directional sealing method to control fluid flow between an air inlet and a pressure chamber
US4864915A (en) * 1988-06-13 1989-09-12 General Motors Corporation Vacuum operated actuator
US20180074527A1 (en) * 2015-05-06 2018-03-15 Mann+Hummel Gmbh Unit for Regulating and Controlling a Fluid Pressure
US10795384B2 (en) * 2015-05-06 2020-10-06 Mann+Hummel Gmbh Unit for regulating and controlling a fluid pressure

Also Published As

Publication number Publication date
GB1264174A (en, 2012) 1972-02-16
JPS5025180B1 (en, 2012) 1975-08-21
BR6906496D0 (pt) 1973-04-26

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