Abstract:
PROBLEM TO BE SOLVED: To provide an operation control device of a compressor and its method, capable of improving operation efficiency of the compressor even if a load of the compressor changes. SOLUTION: This operation control device of the compressor includes a stroke/speed computing element 50 for arithmetically operating a stroke estimated value and a speed estimated value of the compressor 60 on the basis of an electric current value impressed on a motor of the compressor 60 and a voltage value impressed on the motor of the compressor 60, an operation frequency reference value determining part 70 for determining a detected mechanical resonance frequency as an operation frequency reference value by detecting the mechanical resonance frequency of the compressor 60 on the basis of a speed integral value and the electric current value of the motor by outputting the speed integral value by integrating this speed estimated value, and a controller 20 for changing a present operation frequency of the compressor 60 by this determined operation frequency reference value. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a linear compressor and a control method thereof, accurately determining the load state without influence from the external environment and controlling the stroke of a piston excellently. SOLUTION: This linear compressor includes: a core part having a core connected to one side of a vertically reciprocating piston for detecting the position of the piston; and a bobbin having a first sensor coil and a second sensor coil for sensing the position of the core. The compressor includes a control part for measuring the amount of in and out time when the core goes in and out of the bobbin from the suction stroke of the piston to the compression stroke thereof to determine the load state of the piston and control the position of the piston on the basis of the load state. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a gas compression device of a reciprocating compressor capable of controlling a piston stroke distance for adjusting compression quantity of coolant gas to be compressed and allowing minimizing an invalid volume. SOLUTION: This gas compression device comprises an initial position variable piston 120 that reciprocates rectilinearly inside a cylinder 100 for compression and a cylinder 110 for adjusting position, a discharge cover 140 forming a discharge chamber to which gas compressed in the cylinder 100 for compression is discharged, a connection pipe 160 for guiding a part of the gas discharged from the discharge chamber of the discharge cover 140 to flow into the cylinder 110 for adjusting position, and a pressure control means fixed on one side of the connection pipe 160 for adjusting pressure inside the cylinder 110 for adjusting position by pressure of the gas discharged from discharge chamber. COPYRIGHT: (C)2003,JPO
Abstract:
Linear compressor comprising a resonant linear motor (4) having a stator (9) and a linear displacer (3), the linear motor (4) cooperating with a resonant spring (2) that is driven by the linear displacer (3) at one of the ends of the resonant spring (2) with the opposite end of the resonant spring (2) cooperating with a mechanical actuation element (1). A variation sensor of magnetic flux (5) cooperates with the resonant spring (2). Said variation sensor of magnetic flux (5) comprising a fixed part (7) and a movable part (6), the movable part (6) coupled to the end of the resonant spring (2) opposite to the end cooperating with the linear displacer (3). The variation sensor of magnetic flux (5) is the sole means required to determine the displacement amplitude and the frequency of oscillation of the displacer (3) of the linear motor (4). Corresponding method for controlling the stroke in such a linear compressor.
Abstract:
There is proposed a variable stroke assembly having a primary crank, the primary crank having a primary axis of rotation; a hypocycloid gear set having at least one internal gear and at least one spur gear, the internal gear having an axis of rotation that coincides with the primary axis of rotation of the primary crank and the spur gear having a secondary axis of rotation, wherein the primary crank cooperatively engages and rotates within the internal gear about the primary axis of rotation, the spur gear pivotally mounted on the primary crank such that the secondary axis of rotation is offset from the primary axis of rotation; a secondary crank having a third axis of rotation, wherein the secondary crank cooperatively engages the spur gear such that the third axis of rotation is further offset from the primary and secondary axis of rotation; a connecting rod, with a first and second end, the first end of connecting rod is pivotally connected to the secondary crank, wherein operation the connecting rod travels in a substantially linear motion that translates into rotational motion of the secondary crank, spur gear and primary crank.
Abstract:
Vorrichtung zur Durchführung von Chromatographie, vorzugsweise von Flüssigkeits-Prozesschromatographie, insbesondere auf industriellem Gebiet, unter Verwendung jeweils wenigstens einer mit einem Antrieb versehenen Verdrängerpumpe zur Aufgabe von Produkt sowie Eluent (mobile Phase) in mindestens eine Trennsäule (1), wobei der Antrieb (10, 10', 11, 11') jeder Verdrängerpumpe (8, 8', 9, 9') ein hochdynamischer Antrieb ist, der zur Erfassung der Weg-/Zeitdaten mit einem integrierten Gebersystem ausgerüstet ist, die über eine angeschlossene übergeordnete Bewegungssteuerung/-regelung in entsprechende lagegeregelte Fahrbefehle umsetzbar sind.
Abstract:
The present invention relates to a control method and system for a resonant linear compressor, which are especially applied for controlling the capacity of a cooling system. Such a method comprises essentially the following steps: a) reading a reference operation power (I MED ) of the motor of the compressor (100); b) measuring an operation current (I MED ) of the motor of com compressor (100); c) measuring an operation voltage of a control module of the compressor (100); d) calculating an input power (P MED ) of the motor of the compressor (100) as a function of the operation current (I MED ) measured in step b) and of the operation voltage obtained in step c); e) comparing the input power (P MED ) calculated in the preceding step with the reference operation power (Pref); f) if the reference operation power (PREF) is higher than the input power (P MED ), then increase an operation voltage of the compressor (UC); g) if the reference operation power (Pref) is lower than the input power (P MED ), then decrease the operation voltage of the compressor (UC).
Abstract:
Gezeigt wird eine Kältemittelverdichter mit einem hermetisch dichten Verdichtergehäuse, in dessen Innerem eine ein Kältemittel verdichtende Kolben-Zylinder-Einheit (21) angeordnet ist, deren Zylindergehäuse (1) stirnseitig mittels eines Zylinderkopfs (4) verschlossen ist, wobei die Kolben- Zylinder-Einheit (21) mindestens einen Kolben (3) aufweist und wobei ein Linearantrieb (6) vorgesehen ist, umfassend mindestens einen von einer Erregerwicklung (8) umgebenen Schwingkörper (7), welcher mit dem Kolben (3) verbunden ist, um diesen entlang einer Kolbenlängsachse (9) oszillierend zu bewegen. Dabei ist vorgesehen, dass die Kolben-ZyIinder- Einheit (21) mit mindestens einer Dauermagnetanordnung bestückt ist, umfassend jeweils mindestens einen am Kolben (3) ersten Dauermagneten (11) und mindestens einen am Zylindergehäuse (1) angeordneten zweiten Dauermagneten (12), wobei der erste Dauermagnet (11) und der zweite Dauermagnet (12) mit jeweils gleicher Magnetpolrichtung zueinander weisen, um zur Begrenzung des Kolbenwegs im Bereich des oberen Totpunkts und/oder im Bereich des unteren Totpunkts eine abstoßende Wirkung zwischen den beiden Dauermagneten (11, 12) zu erzeugen.
Abstract:
Eine Kältemaschine umfasst einen Kältemittelkreislauf mit einem Verdichter (1 ) und wenigstens einem schaltbaren Element (3, 4) und ein Steuergerät (7), das eingerichtet ist, das Element (3, 4) zu schalten und vor jedem Schalten des Elements (3, 4) ein erstes Steuersignal an den Verdichter (1 ) auszugeben.