EP0776496B1 - Schaltungsanordnung zur ansteuerung wenigstens eines elektrisch ansteuerbaren magneten - Google Patents
Schaltungsanordnung zur ansteuerung wenigstens eines elektrisch ansteuerbaren magneten Download PDFInfo
- Publication number
- EP0776496B1 EP0776496B1 EP95925839A EP95925839A EP0776496B1 EP 0776496 B1 EP0776496 B1 EP 0776496B1 EP 95925839 A EP95925839 A EP 95925839A EP 95925839 A EP95925839 A EP 95925839A EP 0776496 B1 EP0776496 B1 EP 0776496B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive control
- circuit arrangement
- magnet
- switching
- nand
- 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
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Classifications
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
- F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/04—Refrigerators with a horizontal mullion
Definitions
- the invention relates to a circuit arrangement for control at least one electrically controllable magnet with a targeted drive performance, by which the magnet is a switching element in a desired Switching position switches in which the switching element is held is.
- Document FR-A-2 600 150 describes the structure and the control of a bistable solenoid valve with one valve actuator, with the help of two Valve positions are adjustable.
- Circuit arrangements according to the preamble of the claim 1 are for the control of multi-temperature refrigerators known bistable solenoid valves, which to control the flow of refrigerant to the arranged in compartments of different temperatures Serve evaporators.
- Such, used in cooling devices upcoming circuit arrangements have on the input side one for evaluating control parameters, such as temperature controller signals serving logic part, with its Help a triac or two on the circuit output side anti-parallel thyristors for loading of the bistable solenoid valve with the corresponding one Control power are controlled.
- the invention has for its object a circuit arrangement according to the preamble of claim 1 to improve that in a simple way inadvertently caused a change of position Switching position of the electrically controllable as required Magnet is avoided.
- this object is achieved by that the magnet after switching the switching element in the desired switching position at predetermined time intervals repeated with this switch position Corresponding drive performance at least in the short term is acted upon.
- the solution according to the invention ensures that the electrically controllable magnet without additional Monitoring and related evaluation measures always held securely in its required switching position is so that unwanted, possibly to damage leading misalignments of the electrically controllable magnet are reliably prevented.
- the subject matter of the invention provides that the Driving power through the half-waves of an AC voltage is formed, of which a plurality of each directly are generated in succession as a signal sequence, where two consecutive signals are followed by one long time compared to the cycle time of the half-waves are spaced from each other.
- the solution is as required Switch position of one actuated by the electromagnet Switching element ensured in a sufficient manner, at the same time the energy consumption by the circuit arrangement and their stress is minimized.
- a circuit arrangement is driven as required, if according to a last advantageous embodiment of the invention is that the generation the control signals automatically by a control unit depending on at least one control parameter are generated.
- FIG. 1 is a refrigerator and freezer combination 10 shown, the heat insulating housing 11 two through a heat-insulating partition 12 thermally separate, vertically one above the other and lockable storage compartments with separate doors 13 and 14 having.
- the higher one is with the Door 13 lockable storage compartment designed as a cooling compartment 15, which with one another in vertical intervals arranged, for serving refrigerated shelves 16 is equipped.
- the other below the refrigerator compartment 15 arranged through the heat-insulating partition 12 of them separate and lockable with the door 14
- Storage compartment 13 designed as a freezer compartment 17, which is used to hold frozen food with drawer-like extendable freezer containers 18 is equipped.
- Both the refrigerator compartment 15 and the freezer compartment 17 are to maintain its intended storage room temperature equipped with evaporators, not shown, which in a refrigeration circuit, also not shown are included, within which the evaporator compressor supplying liquid refrigerant is arranged, which operates intermittently is, the on and off phases of the compressor from the temperatures prevailing in the storage compartments are dependent.
- evaporators not shown
- a refrigeration circuit also not shown are included, within which the evaporator compressor supplying liquid refrigerant is arranged, which operates intermittently is, the on and off phases of the compressor from the temperatures prevailing in the storage compartments are dependent.
- These are from temperature sensors, not shown recorded and in one to an electronic Evaluation logic 19 belonging to the control device on the one hand to displayable in temperature display elements Values prepared and on the other hand in a circuit arrangement 30 further processable digital signals "A" and "B" processed (see Fig. 2).
- the evaluation logic 19 is connected with its output providing the digital signal "A" via a diode 37 coupled with its anode connection to this output to a circuit section belonging to the circuit arrangement 30, which serves to evaluate the AC voltage usually required for the operation of household appliances, which is generated by a with "L" designated line pole of the AC voltage network is coupled to a resistor 38 serving for current limitation for the operation of logic modules.
- This is connected to two diodes 39 and 40 arranged in series, the diode 39 being connected with its cathode connection to the positive pole of a direct voltage source U B , while the other diode 40 is connected with its anode connection to ground potential, which at the same time has the zero pole "N" of AC voltage.
- NAND-Schmitt trigger 41 The potential which arises at the junction between the diodes 39 and 40 arranged in series is fed on the input side to a NAND-Schmitt trigger 41, the two inputs of which are connected to one another.
- the output of the NAND-Schmitt trigger 41 is connected to the cathode connection of a diode 41.1, which is connected on the anode side to an input of a NAND-Schmitt trigger 42, which at the same time is also supplied with the output signal "B" of the evaluation logic 19.
- the signal "C" is present at the other input of the NAND-Schmitt trigger 42.
- the output of the NAND-Schmitt trigger 42 is connected to the base of a pnp transistor 43, the emitter connection of which is connected to a direct voltage supply U B , while its collector connection is connected via an ohmic resistor which limits the collector current Resistor 44 is connected to ground potential.
- the gate connection connected to a current-limiting series resistor 44.1 for tapping the ignition current of a triac 45 is arranged, with its second main electrode connection one to the line pole "L" one 230 volt AC voltage coupled bistable, two flow paths switching electrically controllable solenoid valve 46 is connected.
- the other main electrode of the triac 45 is connected to the zero pole "N" of the AC voltage supply.
- the input signal "C" at the input of the NAND-Schmitt trigger 31, which is due to the wiring of the NAND-Schmitt trigger 32 is generated in an automatic manner only during the charging time of the capacitor 34 above that Resistor 33 as high level (logic "1") while it for the discharge time of the capacitor 34 via the resistor 36 has low level, both level states by exceeding or falling below a predetermined Switching threshold at the NAND-Schmitt trigger linked at the beginning 32 are effected.
- the output signal of the NAND-Schmitt trigger 31 also becomes still by evaluating the AC line voltage to operate the fridge-freezer combination (e.g. 230 Volts) influenced by the negative half-wave this sinusoidal AC voltage, both diode 40 as well as the diode 37 in the conductive state is, so that on the signal "A" acted upon Input of the NAND-Schmitt trigger 31 for about the duration this half wave is low, causing the output of the NAND-Schmitt trigger 31 goes to high level and thus pnp transistor 43 blocks.
- the fridge-freezer combination e.g. 230 Volts
- the solenoid valve 46 is corresponding to the positive, at equal intervals successive half-waves of the sinusoidal AC voltage, as shown in FIG. 3 under position "1 "are applied, whereby the valve actuator of the solenoid valve 46, which serves as an armature for the electro-magnets, is held in the desired switching position as required.
- the length of time which is denoted in FIG.
- the signal "C" again has a high level, as a result of which the solenoid valve 46 is again subjected to drive power in the form of the positive half-waves of the mains AC voltage supply, in order to ensure that the valve switching element of the solenoid valve 46 is returned to the required switching position is if this had been removed from the triac 45, for example as a result of so-called "overhead ignition".
- a time of 30 s has already been found to be a usable variable for the control pause t p
- a time of 70 ms for the duration of the signal "C" has proven to be favorable.
- this is from time to time in the form of a signal sequence serving as control power of the negative half-waves of the sinusoidal AC voltage, the length of the signal sequence being determined by the duration of the high level for the signal “C” and the period t P between the signal sequences being determined by the duration of the low level for the signal “C”.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Magnetic Treatment Devices (AREA)
Description
- Fig. 1
- ein Zweitemperaturen-Kühlgerät bei geöffneten Türen mit einem Kühlfach und einem Gefrierfach, deren Temperaturen durch eine elektronische Regeleinrichtung gesteuert sind,
- Fig. 2
- einen Ausschnitt der elektronischen Regeleinrichtung mit einer elektronischen Schaltungsanordnung zur Erzeugung von Ansteuersignalen zur Sicherung der bedarfsmäßigen Schaltposition eines bistabilen, den Kältemittelfluß zu den Kältefächern steuernden Magnetventiles,
- Fig. 3
- die zu den beiden Schaltpositionen des bistabilen Magnetventiles korrespondierenden Ansteuersignale, jeweils schematisch aufgetragen auf einer Zeitachse.
Claims (5)
- Schaltungsanordnung zur Ansteuerung wenigstens eines elektrisch ansteuerbaren Magneten mit einer zielgerichteten Ansteuerleistung, durch welche der Magnet ein Schaltglied in eine gewünschte Schaltposition schaltet, in welcher das Schaltglied gehalten ist, dadurch gekennzeichnet, daß der Magnet (46) nach seinem Umschalten des Schaltgliedes in die gewünschte Schaltposition (15, 17) in vorbestimmten Zeitintervallen wiederholt mit einer zu dieser Schaltposition korrespondierenden Ansteuerleistung wenigstens kurzfristig beaufschlagt ist.
- Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß zur Beaufschlagung des Magneten (46) mit Ansteuerleistung Halbleiter-Bauelemente (45) vorgesehen sind, welche nach dem Umschalten des Schaltgliedes in die gewünschte Schaltposition (15, 17) in vorbestimmten Zeitintervallen wiederholt mit einem zur Bereitstellung der Ansteuerleistung dienenden Ansteuersignal beaufschlagt sind.
- Schaltungsanordnung nach Anspruch 2, dadurch gekennzeichnet, daß die Zeitintervalle zwischen den Ansteuersignalen gleich lang bemessen sind.
- Schaltungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ansteuerleistung durch die Halbwellen einer Wechselspannung gebildet ist, von denen jeweils eine Mehrzahl unmittelbar hintereinander als Signalfolge erzeugt sind, wobei zwei aufeinanderfolgende Signalfolgen durch eine gegenüber der Zykluszeit der Halbwellen große Zeitdauer voneinander beabstandet sind.
- Schaltungsanordnung nach Anspruch 4, dadurch gekennzeichnet, daß die Erzeugung der Ansteuersignale selbsttätig durch eine Ansteuereinheit (32, 33, 34, 35, 36) in Abhängigkeit wenigstens eines Ansteuerparameters erzeugt sind.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4429918 | 1994-08-23 | ||
DE4429918A DE4429918A1 (de) | 1994-08-23 | 1994-08-23 | Schaltungsanordnung zur Ansteuerung wenigstens eines elektrisch ansteuerbaren Magneten |
PCT/EP1995/002620 WO1996006388A1 (de) | 1994-08-23 | 1995-07-06 | Schaltungsanordnung zur ansteuerung wenigstens eines elektrisch ansteuerbaren magneten |
US08/805,328 US5889646A (en) | 1994-08-23 | 1997-02-24 | Circuit configuration and method for triggering at least one electrically triggerable magnet |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0776496A1 EP0776496A1 (de) | 1997-06-04 |
EP0776496B1 true EP0776496B1 (de) | 1998-09-30 |
Family
ID=25939458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95925839A Expired - Lifetime EP0776496B1 (de) | 1994-08-23 | 1995-07-06 | Schaltungsanordnung zur ansteuerung wenigstens eines elektrisch ansteuerbaren magneten |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0776496B1 (de) |
CN (1) | CN1160444A (de) |
BR (1) | BR9508737A (de) |
DE (1) | DE59503808D1 (de) |
ES (1) | ES2125027T3 (de) |
PL (1) | PL178333B1 (de) |
TR (1) | TR199500942A2 (de) |
WO (1) | WO1996006388A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010001458A1 (de) * | 2010-02-01 | 2011-08-04 | BSH Bosch und Siemens Hausgeräte GmbH, 81739 | Kältegerät und Kältemaschine dafür |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3127024A1 (de) * | 1981-07-09 | 1983-01-20 | Brown, Boveri & Cie Ag, 6800 Mannheim | Schaltung zum betrieb, ueberwachung und fehlerdiagnose einer einkanal-klimaanlage |
JPS61244983A (ja) * | 1985-04-19 | 1986-10-31 | Nissan Motor Co Ltd | 電磁制御バルブ装置 |
JPS62288783A (ja) * | 1986-06-06 | 1987-12-15 | Mitsubishi Mining & Cement Co Ltd | ガス用電磁弁装置 |
IT1203572B (it) * | 1986-06-11 | 1989-02-15 | Elbi Int Spa | Circuito frigorigeno per impianti frigoriferi includenti una fluralilita'di ambienti refrigeranti ed elettrovalvola deviatrice bistabile utilizzabile in tale circuito |
US4838037A (en) * | 1988-08-24 | 1989-06-13 | American Standard Inc. | Solenoid valve with supply voltage variation compensation |
-
1995
- 1995-07-06 BR BR9508737A patent/BR9508737A/pt not_active IP Right Cessation
- 1995-07-06 PL PL95318462A patent/PL178333B1/pl not_active IP Right Cessation
- 1995-07-06 EP EP95925839A patent/EP0776496B1/de not_active Expired - Lifetime
- 1995-07-06 WO PCT/EP1995/002620 patent/WO1996006388A1/de active IP Right Grant
- 1995-07-06 ES ES95925839T patent/ES2125027T3/es not_active Expired - Lifetime
- 1995-07-06 DE DE59503808T patent/DE59503808D1/de not_active Expired - Lifetime
- 1995-07-06 CN CN95194742A patent/CN1160444A/zh active Pending
- 1995-08-02 TR TR95/00942A patent/TR199500942A2/xx unknown
Also Published As
Publication number | Publication date |
---|---|
ES2125027T3 (es) | 1999-02-16 |
EP0776496A1 (de) | 1997-06-04 |
TR199500942A2 (tr) | 1996-06-21 |
DE59503808D1 (de) | 1998-11-05 |
BR9508737A (pt) | 1997-11-11 |
PL178333B1 (pl) | 2000-04-28 |
CN1160444A (zh) | 1997-09-24 |
WO1996006388A1 (de) | 1996-02-29 |
PL318462A1 (en) | 1997-06-09 |
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