EP0156962A1 - Expansion valve - Google Patents

Expansion valve Download PDF

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Publication number
EP0156962A1
EP0156962A1 EP84113580A EP84113580A EP0156962A1 EP 0156962 A1 EP0156962 A1 EP 0156962A1 EP 84113580 A EP84113580 A EP 84113580A EP 84113580 A EP84113580 A EP 84113580A EP 0156962 A1 EP0156962 A1 EP 0156962A1
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EP
European Patent Office
Prior art keywords
valve
expansion valve
plunger
tappet
membrane
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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.)
Granted
Application number
EP84113580A
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German (de)
French (fr)
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EP0156962B1 (en
Inventor
Rudibert Dipl.-Ing. Götzenberger
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Ernst Flitsch GmbH and Co
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Ernst Flitsch GmbH and Co
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Publication of EP0156962A1 publication Critical patent/EP0156962A1/en
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    • 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

Definitions

  • the invention relates to an expansion valve for installation in a refrigerant circuit consisting of a compressor, condenser and evaporator of the type specified in the preamble of claim 1.
  • thermostatic expansion valves are usually used, which are controlled by means of a temperature sensor attached to the evaporator outlet and containing a vapor-forming liquid in such a way that the vapor pressure of the filling medium of the temperature sensor acts on the control head of the expansion valve, with the aid of a Overheating spring the desired overheating is set at the evaporator outlet.
  • thermostatic expansion valves have some drawbacks despite their perfection. Since the valves must be adapted to the refrigerant used in each case, this forces the manufacturer to produce a corresponding number of functionally similar devices or devices with interchangeable nozzles of different sizes. In addition, the time constant of such valves, which depends on the dimensions of the diaphragm or corrugated tube diameter, the spring hardness of the overheating spring, the selected nozzle size and the filling medium of the control system, can no longer be changed in a finished valve.
  • the invention has for its object to provide an expansion valve of the aforementioned type, which does not have the disadvantages mentioned, no capillary tube for connecting the temperature sensor to the control head of the Valve required and remote monitoring of the functional sequence during operation.
  • valve according to the invention both the smallest and the greatest outputs can be controlled properly, regardless of the refrigerant used, gas-filled components which are exposed to the risk of leakage are eliminated, and the interchangeability of the electrical parts ensures a longer service life.
  • the valve body 1 has an inlet 2 for the refrigerant which receives the suction line and an outlet 3 to which the line leading to the evaporator is connected.
  • a sleeve 4 forming the valve seat 41, through which the valve tappet 5 is guided.
  • the closing body cooperating with the valve seat 41 is formed by an annular disk 6 made of plastic, which comprises the valve tappet 5 and bears on the one hand against an annular shoulder formed on the valve tappet 5 and on the other hand against an O-ring which is arranged in a recess in an annular body 7, against its shoulder is the ring flange a sleeve holding a filter 9 and against whose ring flange there is a helical spring 8 which is supported on an abutment ring 10 which can be displaced in the longitudinal direction of the valve by means of an P Allen screw 11 which engages in a thread cut into the valve body 1.
  • the plunger 5 has a capillary bore 51 and at its upper end an annular shoulder 52 which bears against the membrane 12 and a pin-shaped end 53 which extends through an axial recess in the membrane 12 and has a reduced diameter and which has the end face of a plunger which is movable in the longitudinal direction of the valve 14 is opposite.
  • the end face of the annular shoulder 52 of the plunger 5 has a recess, from which notches or openings 54 penetrating the casing of the plunger 5 extend, which open into a channel 31 leading to the outlet 3.
  • the plunger is tapered in order to achieve a tension-proportional stroke of the plunger.
  • a retaining spring 21 against the upper end face of the plunger, the abutment of which is formed by a screw bolt 18 rigidly connected to the guide sleeve 15, on which a crown nut is attached 19 is screwed, a sealing ring 20 is arranged between the annular end face and the upper end plate of the housing 17 accommodating the magnet coil 16.
  • FIG. 1 Embodiment modified in such a way that the flow direction of the refrigerant is reversed and the refrigerant flows from the area 3 through a radial bore provided in the plunger 5 directly into the capillary bore 51 of the plunger 5.
  • the capillary bore 51 is closed at the lower end of the plunger 5, and the arrangement of the filter 9 can be dispensed with.
  • a screen acting as a filter can be inserted into the capillary bore 51.

Abstract

Um das Einspritzen des Kühlmittels in den Verdampfer einer Kälteanlage mit einem Expansionsventil vornehmen zu können, das die Nachteile thermostatischer Expansionsventile nicht aufweist und keines Kapillarrohres zur Verbindung des am Verdampferausgang angeordneten Temperaturfühlers mit dem Steuerkopf des Expansionsventils, keiner Anordnung einer Überhitzungsfeder und auch keines Einbaus einer auswechselbaren, der jeweiligen Leistung und dem jeweils verwendeten Kühlmittel angepaßten Düse bedarf, wird ein Expansionsventil vorgeschlagen, dessen eine axiale Kapillarbohrung (51) aufweisender, mit einer Schulter (52) gegen die Membran (12) anliegender Ventilstößel (5) mit seinem dem Ventilsitz (41) entgegengesetzten zapfenförmigen Ende (53) die Membran (12) durchsetzt, und das einen in einer Magnetspule (16) angeordneten, das Verschließen und Öffnen der Kapillarbohrung (51) bewirkenden Plunger (14) aufweist.In order to be able to inject the coolant into the evaporator of a refrigeration system with an expansion valve that does not have the disadvantages of thermostatic expansion valves and no capillary tube for connecting the temperature sensor arranged at the evaporator outlet to the control head of the expansion valve, no arrangement of an overheating spring and also no installation of a replaceable one An expansion valve is proposed, the valve of which has an axial capillary bore (51) and a valve tappet (5) with a shoulder (52) against the diaphragm (12) with its valve seat (41 ) opposite pin-shaped end (53) passes through the membrane (12), and which has a plunger (14) arranged in a magnetic coil (16), which closes and opens the capillary bore (51).

Description

Die Erfindung betrifft ein Expansionsventil zum Einbau in einen aus Kompressor, Kondensator und Verdampfer bestehenden Kältemittelkreislauf der im Oberbegriff des Anspruchs 1 angegebenen Gattung.The invention relates to an expansion valve for installation in a refrigerant circuit consisting of a compressor, condenser and evaporator of the type specified in the preamble of claim 1.

Zur Dosierung des in einen Verdampfer eingespritzten flüssigen Kältemittels werden meist thermostatische Expansionsventile eingesetzt, die mittels eines am Verdampferausgang angebrachten, eine dampfbildende Flüssigkeit enthaltenden Temperaturfühlers in der Weise gesteuert werden, daß der Dampfdruck des Füllmediums des Temperaturfühlers auf den Steuerkopf des Expansionsventils wirkt, wobei mittels einer Überhitzungsfeder die gewünschte Überhitzung am Verdampferausgang eingestellt wird.For metering the liquid refrigerant injected into an evaporator, thermostatic expansion valves are usually used, which are controlled by means of a temperature sensor attached to the evaporator outlet and containing a vapor-forming liquid in such a way that the vapor pressure of the filling medium of the temperature sensor acts on the control head of the expansion valve, with the aid of a Overheating spring the desired overheating is set at the evaporator outlet.

Diese thermostatischen Expansionsventile weisen jedoch trotz ihrer Vervollkommnung einige Nachteile auf. Da die Ventile dem jeweils verwendeten Kältemittel angepaßt sein müssen, zwingt dies die Hersteller zur Fertigung einer entsprechenden Vielzahl funktionell gleichartiger Geräte bzw. von Geräten mit auswechselbaren Düsen unterschiedlicher Größe. Außerdem kann die Zeitkonstante solcher Ventile, die von den Abmessungen des Membran- oder Wellrohrdurchmessers, der Federhärte der Überhitzungsfeder, der gewählten Düsengröße und dem Füllmedium des Steuersystems abhängig ist, bei einem fertigen Ventil nicht mehr geändert werden.However, these thermostatic expansion valves have some drawbacks despite their perfection. Since the valves must be adapted to the refrigerant used in each case, this forces the manufacturer to produce a corresponding number of functionally similar devices or devices with interchangeable nozzles of different sizes. In addition, the time constant of such valves, which depends on the dimensions of the diaphragm or corrugated tube diameter, the spring hardness of the overheating spring, the selected nozzle size and the filling medium of the control system, can no longer be changed in a finished valve.

Der Erfindung liegt die Aufgabe zugrunde, ein Expansionsventil der vorgenannten Gattung zu schaffen, das die erwähnten Nachteile nicht aufweist, kein Kapillarrohr zur Verbindung des Temperaturfühlers mit dem Steuerkopf des Ventils benötigt und eine Fernüberwachung des Funktionsablaufs während des Betriebs ermöglicht.The invention has for its object to provide an expansion valve of the aforementioned type, which does not have the disadvantages mentioned, no capillary tube for connecting the temperature sensor to the control head of the Valve required and remote monitoring of the functional sequence during operation.

Diese Aufgabe wird gemäß der Erfindung mit den im Kennzeichen des Anspruchs 1 angegebenen Mitteln gelöst. Vorteilhafte Ausgestaltungen des erfindungsgemäßen Ventils sind aus den Unteransprüchen ersichtlich.This object is achieved according to the invention with the means specified in the characterizing part of claim 1. Advantageous embodiments of the valve according to the invention can be seen from the subclaims.

Mit dem erfindungsgemäßen Ventil können sowohl kleinste als auch größte Leistungen einwandfrei unabhängig vom jeweils verwendeten Kältemittel ausgesteuert werden, gasgefüllte, der Gefahr der Undichtigkeit ausgesetzte Bauteile entfallen, und die Austauschbarkeit der elektrischer Teile gewährleistet eine größere Lebensdauer.With the valve according to the invention, both the smallest and the greatest outputs can be controlled properly, regardless of the refrigerant used, gas-filled components which are exposed to the risk of leakage are eliminated, and the interchangeability of the electrical parts ensures a longer service life.

In der Zeichnung ist ein Ausführungsbeispiel des erfindungsgemäßen Expansionsventils in schematischer Weise dargestellt. Es zeigen

  • Fig. 1 einen Längsschnitt durch das Ventil;
  • Fig. 2 einen Ausschnitt der Fig. 1 in vergrößertem Maßstab.
In the drawing, an embodiment of the expansion valve according to the invention is shown in a schematic manner. Show it
  • 1 shows a longitudinal section through the valve.
  • Fig. 2 shows a detail of Fig. 1 on an enlarged scale.

Der Ventilkörper 1 weist einen die Saugleitung aufnehmenden Einlaß 2 für das Kältemittel und einen Auslaß 3 auf, an den die zum Verdampfer führende Leitung angeschlossen ist. Im Ventilkörper ist eine den Ventilsitz 41 bildende Hülse 4 angeordnet, durch die der Ventilstößel 5 hindurchgeführt ist. Der mit dem Ventilsitz 41 zusammenwirkende Schließkörper wird durch eine aus Kunststoff bestehende Ringscheibe 6 gebildet, die den Ventilstößel 5 umfaßt und einerseits gegen eine am Ventilstößel 5 gebildete Ringschulter und andererseits gegen einen O-Ring anliegt, der in einer Aussparung eines Ringkörpers 7 angeordnet ist, gegen dessen Schulter der Ringflansch einer einen Filter 9 aufnehmenden Hülse und gegen deren Ringflansch eine Schraubenfeder 8 anliegt, die sich an einem Widerlagerring 10 abstützt, der in Längsrichtung des Ventils mittels einer in ein in den Ventilkörper 1 eingeschnittenes Gewinde eingreifendEPInbus-schraube 11 verschoben werden kann.The valve body 1 has an inlet 2 for the refrigerant which receives the suction line and an outlet 3 to which the line leading to the evaporator is connected. Arranged in the valve body is a sleeve 4 forming the valve seat 41, through which the valve tappet 5 is guided. The closing body cooperating with the valve seat 41 is formed by an annular disk 6 made of plastic, which comprises the valve tappet 5 and bears on the one hand against an annular shoulder formed on the valve tappet 5 and on the other hand against an O-ring which is arranged in a recess in an annular body 7, against its shoulder is the ring flange a sleeve holding a filter 9 and against whose ring flange there is a helical spring 8 which is supported on an abutment ring 10 which can be displaced in the longitudinal direction of the valve by means of an P Allen screw 11 which engages in a thread cut into the valve body 1.

Der Stößel 5 weist eine Kapillarbohrung 51 und an seinem oberen Ende eine gegen die Membran 12 anliegende Ringschulter 52 und ein durch eine axiale Aussparung der Membran 12 hindurchgreifendes, einen verringerten Durchmesser aufweisendes zapfenförmiges Ende 53 auf, dem die Stirnfläche eines in Längsrichtung des Ventils beweglicher Plunger 14 gegenüberliegt. Die Stirnfläche der Ringschulter 52 des Stößels 5 weist eine Vertiefung auf, von der den Mantel des Stößels 5 durchsetzende Kerben oder Durchbrüche 54 ausgehen, die in einen zum Auslaß 3 führenden Kanal 31 münden. Zwischen dem Ende 53 und der Membran 12 besteht ein Ringspalt 13, so daß bei von dem Stößel 5 abgehobenem Plunger 14 in den Raum oberhalb der Membran eingespritztes und in diesem Raum verdampfendes Kältemittel durch den Ringspalt 13 in die Verdampferleitung gelangen kann. Hierbei übt das oberhalb der Membran verdampfte Kältemittel auf die Membran einen Druck aus, der den auf der Unterseite der Membran herrschenden Verdampferdruck übersteigt. Um einen dichten Abschluß zu gewährleisten, ist an der unteren Stirnfläche des Plungers 14 eine Dichtscheibe 22 aus nachgiebigem Werkstoff angeordnet. Der Plunger 14 gleitet in einer Führungshülse 15 aus unmagnetischem Material, so daß die Kraftlinien der um die Führungshülse 15 angeordneten Magnetspule in den Plunger eintreten können. An seinem oberen Ende ist der Plunger konisch verjüngt, um auf diese Weise einen spannungsproportionalen Hub des Plungers zu erzielen. Um einen Einbau des Expansionsventils in jeder Lage zu ermöglichen, beispielsweise das Expansionsventil auch in Fahrzeuge einbauen zu können, in denen es Fliehkräften unterworfen ist, liegt gegen die obere Stirnfläche des Plungers eine Haltefeder 21 an, deren Widerlager durch einen starr mit der Führungshülse 15 verbundenen Schraubenbolzen 18 gebildet wird, auf den eine Kronenmutter 19 aufgeschraubt ist, zwischen deren ringförmiger Stirnfläche und der oberen Abschlußplatte des die Magnetspule 16 aufnehmenden Gehäuses 17 ein Dichtring 20 angeordnet ist.The plunger 5 has a capillary bore 51 and at its upper end an annular shoulder 52 which bears against the membrane 12 and a pin-shaped end 53 which extends through an axial recess in the membrane 12 and has a reduced diameter and which has the end face of a plunger which is movable in the longitudinal direction of the valve 14 is opposite. The end face of the annular shoulder 52 of the plunger 5 has a recess, from which notches or openings 54 penetrating the casing of the plunger 5 extend, which open into a channel 31 leading to the outlet 3. Between the end 53 and the membrane 12 there is an annular gap 13, so that when the plunger 14 is lifted from the plunger 5, refrigerant injected into the space above the membrane and evaporating in this space can pass through the annular gap 13 into the evaporator line. In this case, the refrigerant evaporated above the membrane exerts a pressure on the membrane that exceeds the evaporator pressure prevailing on the underside of the membrane. In order to ensure a tight seal, a sealing washer 22 made of flexible material is arranged on the lower end face of the plunger 14. The plunger 14 slides in a guide sleeve 15 made of non-magnetic material, so that the lines of force of the magnet coil arranged around the guide sleeve 15 can enter the plunger. At its upper end, the plunger is tapered in order to achieve a tension-proportional stroke of the plunger. To install the expansion valve in any position enable, for example, to be able to also install the expansion valve in vehicles in which it is subjected to centrifugal forces, there is a retaining spring 21 against the upper end face of the plunger, the abutment of which is formed by a screw bolt 18 rigidly connected to the guide sleeve 15, on which a crown nut is attached 19 is screwed, a sealing ring 20 is arranged between the annular end face and the upper end plate of the housing 17 accommodating the magnet coil 16.

Sollte bei dem in Fig. l dargestellten Strömungsverlauf des Kältemittels im Bereich des Ventilsitzes 41 und der das Ventil schließenden, einen Flachsitz bildenden Ringscheibe 6 ein Abriß der Strömung befürchtet werden, der zu Schwingungen des Ventilstößels 5 führt, so kann das in Fig. 1 dargestellte Ausführungsbeispiel in der Weise abgewandelt werden, daß die Strömungsrichtung des Kältemittels umgekehrt wird und das Kältemittel aus dem Bereich 3 durch eine in dem Stößel 5 vorgesehene Radialbohrung unmittelbar in die Kapillarbohrung 51 des Stößels 5 einfließt. Im diesem Fall ist die Kapillarbohrung 51 am unteren Ende des Stößels 5 verschlossen,und auf die Anordnung des Filters 9 kann verzichtet werden. Anstelle des Filters 9 kann in die Kapillarbohrung 51 ein als Filter wirkendes Sieb eingesetzt werden.If, in the flow profile of the refrigerant in the region of the valve seat 41 and the ring disk 6 closing the valve and forming a flat seat, there is a fear that the flow may break off, which leads to vibrations of the valve tappet 5, this can be shown in FIG. 1 Embodiment modified in such a way that the flow direction of the refrigerant is reversed and the refrigerant flows from the area 3 through a radial bore provided in the plunger 5 directly into the capillary bore 51 of the plunger 5. In this case, the capillary bore 51 is closed at the lower end of the plunger 5, and the arrangement of the filter 9 can be dispensed with. Instead of the filter 9, a screen acting as a filter can be inserted into the capillary bore 51.

Claims (8)

1. Expansionsventil zum Einspritzen eines Kältemittels in den Verdampfer einer Kälteanlage mit einem von einer Membran hydro-pneumatisch gesteuerten Ventilstößel und einem am Verdampferausgang angeordneten, den Strom einer Magnetspule beeinflussenden Steuerorgan, dadurch gekennzeichnet, daß - der eine axiale Kapillarbohrung (51) aufweisende Ventilstößel (5) mit einer Schulter (52) gegen die Membran (12) anliegt, - der Ventilstößel (5) mit seinem dem Ventilsitz (41) entgegengesetzten Ende (53) kleineren Durchmessers die Membran (12) in einer axialen Aussparung mit einem gegenüber dem Stößelende (53) größeren Durchmesser durchsetzt, und - das Expansionsventil einen in der Magnetspule (16) angeordneten, das Verschließen und Öffnen der Kapillarbohrung (51) bewirkenden Plunger (14) aufweist. 1. Expansion valve for injecting a refrigerant into the evaporator of a refrigeration system with a valve lifter controlled by a diaphragm hydro-pneumatically and a arranged at the evaporator outlet, influencing the flow of a solenoid control element, characterized in that - The valve tappet (5), which has an axial capillary bore (51), rests with a shoulder (52) against the membrane (12), - The valve tappet (5) with its valve seat (41) opposite end (53) of smaller diameter, the membrane (12) in an axial recess with a larger diameter than the tappet end (53), and - The expansion valve has a plunger (14) arranged in the magnet coil (16) which closes and opens the capillary bore (51). 2. Expansionsventil nach Anspruch 1, dadurch gekennzeichnet , daß die die Schulter (52) des Ventilstößels (5) bildende Stirnfläche eine Vertiefung aufweist, die über den durch die axiale Aussparung der Membran (12) gebildeten Ringspalt (13) mit der oberhalb der Membran (12) gelegenen Steuerkammer und über Durchbrüche (54) im Ventilstößel (5) sowie einen Kanal (31) mit der zum Verdampfer führenden Leitung in Verbindung steht.2. Expansion valve according to claim 1, characterized in that the shoulder (52) of the valve tappet (5) forming the end face has a recess which is formed by the annular gap (13) formed by the axial recess of the membrane (12) with that above the membrane (12) located control chamber and through openings (54) in the valve tappet (5) and a channel (31) with the line leading to the evaporator in connection. 3. Expansionsventil nach den Ansprüchen 1 und 2, dadurch gekennzeichnet , daß das der Membran (12) gegenüberliegende Ende des Plungers (14) eine konische Verjüngung aufweist.3. Expansion valve according to claims 1 and 2, characterized in that the membrane (12) opposite end of the plunger (14) has a conical taper. 4. Expansionsventil nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß an der Stirnseite des die Magnetspule (16) umschließenden Gehäuses (17) eine auf den Plunger (14) wirkende Feder (21) angeordnet ist.4. Expansion valve according to one of claims 1 to 3, characterized in that on the end face of the magnet coil (16) enclosing housing (17) on the plunger (14) acting spring (21) is arranged. 5. Expansionsventil nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , daß in dem einen Einlaß (2) und einen Auslaß (3) für das Kältemittel aufweisenden Ventilkörper (1) eine auf den Ventilstößel (5) wirkende Feder (8) angeordnet ist.5. Expansion valve according to one of claims 1 to 4, characterized in that in the one inlet (2) and an outlet (3) for the refrigerant valve body (1) is arranged on the valve stem (5) acting spring (8) . 6. Expansionsventil nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet , daß der Ventilsitz durch die Stirnfläche einer vom Ventilstößel (5) durchsetzten Hülse (4) und der Schließkörper durch eine aus Kunststoff bestehende, gegen eine Ringschulter des Ventilstößels (5) anliegende Ringscheibe (6) gebildet wird.6. Expansion valve according to one of claims 1 to 5, characterized in that the valve seat through the end face of a sleeve (4) penetrated by the valve tappet (5) and the closing body is formed by an annular disk (6) which is made of plastic and bears against an annular shoulder of the valve tappet (5). 7. Expansionsventil nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet , daß vor der unteren Öffnung der Kapillarbohrung (51) des Ventilstößels (5) ein von einer Hülse umschlossenes Filter (9) angeordnet ist.7. Expansion valve according to one of claims 1 to 6, characterized in that a filter (9) enclosed by a sleeve is arranged in front of the lower opening of the capillary bore (51) of the valve tappet (5). 8. Expansionsventil nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet , daß an der dem die Membran (12) durchsetzenden Stößelende (53) gegenüberliegenden Stirnfläche des Plungers (14) eine Scheibe (22) aus nachgiebigem Werkstoff angeordnet ist.8. Expansion valve according to one of claims 1 to 7, characterized in that on the diaphragm (12) penetrating plunger end (53) opposite end face of the plunger (14) a disc (22) made of resilient material is arranged.
EP84113580A 1983-12-12 1984-11-10 Expansion valve Expired EP0156962B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3344816 1983-12-12
DE19833344816 DE3344816A1 (en) 1983-12-12 1983-12-12 EXPANSION VALVE

Publications (2)

Publication Number Publication Date
EP0156962A1 true EP0156962A1 (en) 1985-10-09
EP0156962B1 EP0156962B1 (en) 1988-03-23

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Application Number Title Priority Date Filing Date
EP84113580A Expired EP0156962B1 (en) 1983-12-12 1984-11-10 Expansion valve

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Country Link
US (1) US4606199A (en)
EP (1) EP0156962B1 (en)
JP (1) JPS60140074A (en)
BR (1) BR8406334A (en)
DE (2) DE3344816A1 (en)
DK (1) DK591184A (en)
ES (1) ES283335Y (en)

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CN101988587A (en) * 2009-08-06 2011-03-23 北京菁华昱创节能设备有限公司 Multifunctional control valve
US20150052924A1 (en) * 2013-08-22 2015-02-26 Standard Motor Products, Inc. Thermal Expansion Valve with Power Element
CN104482274B (en) * 2014-10-28 2016-09-14 珠海格力电器股份有限公司 Electric expansion valve
US10993546B2 (en) 2016-10-28 2021-05-04 Sleep Number Corporation Noise reducing plunger
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US5669413A (en) * 1994-06-21 1997-09-23 Staefa Control System Scs Ag Control valve having an actuating drive and method therefor

Also Published As

Publication number Publication date
EP0156962B1 (en) 1988-03-23
DE3470094D1 (en) 1988-04-28
ES283335U (en) 1985-05-16
DE3344816A1 (en) 1985-06-20
BR8406334A (en) 1985-10-08
DK591184D0 (en) 1984-12-11
US4606199A (en) 1986-08-19
DK591184A (en) 1985-06-13
JPS60140074A (en) 1985-07-24
ES283335Y (en) 1986-01-01

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