EP1533583A2 - Eclairage intérieur pour appareil à conditionnement de température utilisant une diode électroluminescente (DEL) comme source lumineuse - Google Patents

Eclairage intérieur pour appareil à conditionnement de température utilisant une diode électroluminescente (DEL) comme source lumineuse Download PDF

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Publication number
EP1533583A2
EP1533583A2 EP04027051A EP04027051A EP1533583A2 EP 1533583 A2 EP1533583 A2 EP 1533583A2 EP 04027051 A EP04027051 A EP 04027051A EP 04027051 A EP04027051 A EP 04027051A EP 1533583 A2 EP1533583 A2 EP 1533583A2
Authority
EP
European Patent Office
Prior art keywords
light
interior lighting
interior
circuit arrangement
emitting diode
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.)
Withdrawn
Application number
EP04027051A
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German (de)
English (en)
Inventor
Günter Rosenbaum
Ulrich Blanc
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.)
Hugo Gorner GmbH
Original Assignee
Hugo Gorner GmbH
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 DE20318059U external-priority patent/DE20318059U1/de
Application filed by Hugo Gorner GmbH filed Critical Hugo Gorner GmbH
Publication of EP1533583A2 publication Critical patent/EP1533583A2/fr
Withdrawn legal-status Critical Current

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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
    • F25D27/00—Lighting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0004—Personal or domestic articles
    • F21V33/0044—Household appliances, e.g. washing machines or vacuum cleaners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/30—Lighting for domestic or personal use
    • F21W2131/305—Lighting for domestic or personal use for refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

Definitions

  • the present invention relates to interior lighting for household appliances, in particular a temperature control device with a light emitting diode as a light source and a Cooling device with such a light source, further exhaust systems such Exhaust hoods for kitchens with such interior lighting.
  • interior lighting for home appliances in particular Tempering devices designed with a light bulb or a neon tube.
  • the object of the invention is thus, the above-mentioned disadvantages of the prior the technology in interior lighting for home appliances, in particular Avoid tempering and interior lighting available To provide that is reliable, gives a better light intensity, low maintenance and minimizes the risk of electric shock.
  • the object of the invention is achieved in that in a Indoor lighting for household appliances, preferably temperature control, in particular Refrigerators, is provided, the interior lighting with at least one Design illuminants, wherein the illuminant is a light emitting diode, which in the Essentially emitted white light.
  • a light-emitting diode instead of the previously used bulbs, such as a light bulb, has the advantage that low power lines from, for example, an external power supply to the interior of the Household appliance, especially the refrigerator can be pulled to to supply the LED with electricity.
  • An introduction of 230 volt lines For example, in the refrigerator interior is when using a LED as illuminant for illuminating a refrigerator interior then no longer necessary.
  • the Interior lighting includes a switching device with which the lighting For example, when opening the refrigerator door can be turned on.
  • the contactless or Non-contact switch integrated into the circuit of the interior lighting become.
  • the use of a light-emitting diode has the further advantage that one Turning the light bulb on and off not only with a mechanical Switch as before can be done, but also with the help of at different Sites arranged sensor devices. These sensor devices are in turn electrically connected to the light emitting diode.
  • a sensor device For example, distance sensors, brightness sensors or even come Vibrating sensors into consideration.
  • the circuit arrangement may in a preferred embodiment a circuit arrangement with a current control, in which the brightness of the lighting means by changing the provided current at the LED can be adjusted.
  • the Circuit arrangement comprises a switching device which has a first current for a high brightness of the LED and a second current for a low Luminous intensity of the LED provides.
  • the power supply of the light emitting diode with a Constant current source is characterized by a constant current output and is in particular by a current-controlled Drive circuit obtained, which includes a current control, which z. B. at decreasing mains voltage readjusts the current so that the drive current the LED is always constant.
  • a Constant current is the luminosity, that is the radiant power of the LED always the same.
  • the power consumption of the circuit is lower than at Interior lighting according to the prior art.
  • Another advantage of Arrangement according to the invention is that the luminous efficacy by a multiple is higher than in systems with the usual bulbs such as for example, a light bulb.
  • a light source for example, preferably a Luxeon TM III Star LED Lumi LEDS Lightening LLC, 370 West Rembles Road, San Jose, CA. 95131, USA related. This bulb gives a power of 1 or 3 watts from.
  • FIG. 1 shows a luminous means according to the invention.
  • the invention Illuminant is a white light LED 1, which is arranged on a support 3 is.
  • the rear wall is marked with reference numeral 12, the front wall with the Door to open with 14, the top with 16 and the bottom with 18.
  • the luminous body which is designed as a white-light LED, is on a Carrier 3.1, at an inclination of about 20 ° relative to the top wall 16th arranged.
  • the depth A of the interior, such as a refrigerator in the illustrated embodiment is preferably in the range 30 to 50 cm, preferred especially at 40 cm; the height B preferably in the range 60 to 70 cm, preferably at 66 cm.
  • FIG. 3 shows an embodiment of the invention with two luminous bodies.
  • the one light-emitting diode 1.1 is arranged on the ceiling 18, to the Light-emitting diode 1.2 is arranged on the front wall 14.
  • Both light-emitting diodes 1.1, 1.2 are mounted on support 3.1, 3.2 at an angle ⁇ .
  • the depth A lies preferably in the range 30 to 50 cm., Particularly preferably at 40 cm; the height B preferably in the range 120 to 180 cm, preferably in particular 140 cm.
  • FIG 4 is a schematic representation of an inventive Circuit arrangement with two light-emitting diodes 1.1, 1.2 as a luminous element, a Power supply 100 and a switch assembly 102 shown.
  • the power supply 100 is on a mains voltage of 230 volts connected and preferably has a Transformer, for example, the mains voltage to a voltage of 3.5 Volts transformed.
  • the power supply 100 is according to the invention outside the Interior of a household appliance, such as the refrigerator interior arranged to lay the power lines in, for example, the Refrigerator interior to avoid.
  • Connected to the mains is a manual one Pressure switch, which is electrically connected to the power supply, and these on or off, for example when the refrigerator door is open or closed becomes.
  • the LED is in a filament housing 106.1, 106.2 housed.
  • the luminous body housing is preferably a Plastic housing made of polycarbonate.
  • the light housing includes a Carrier substrate 108.1, 108.2 for the light-emitting diode 1.1, 1.2 and a cover 110.1, 110.2 for the light-emitting diodes 1.1, 1.2.
  • the carrier substrate preferably comprises a heat sink, for example a metal block, in particular a Aluminum block or an aluminum substrate.
  • the cover 110.1, 110.2 is off made of a plastic, in particular of a polycarbonate.
  • the Carrier substrate 108.1, 108.2 of the respective light-emitting diodes 1.1, 1.2 comprise a slanted section 208.1, 208.2 on the light emitting diode 1.1, 1.2 below an angle ⁇ on the carrier substrate 108.1, 108.2 are arranged.
  • the carrier substrate comprises two stops 210.1, 210.2 and 212.1, 212.2, which serve to receive the cover 110.1, 110.2.
  • the cover in turn has a so-called optical region 220.1, 220.2 for the light distribution of the radiated from the light emitting diode 1.1, 1.2 White light.
  • the manual Pressure switch by appropriate sensors, such as a Brightness sensor can be replaced without departing from the spirit of the invention becomes.
  • the illustrated two Luminaire or two light-emitting diodes 1.1, 1.2 at more than two different Make in the refrigerator to provide such a luminous body.
  • one Design with only one lamp would be conceivable. This only needs the power supply are designed accordingly.
  • FIG. 5 shows a luminous body housing 106.1, 106.2 according to the invention
  • the optical range for the light distribution is 220.1 characterized.
  • the LED is marked with 1.1.
  • the optical area 110.1 describes the area in which the light of the light-emitting diode 1.1 is emitted and, for example, is directed to the interior of the refrigerator interior.
  • the non-optical region for the light distribution of the cover 110.1 is 222.1 characterized. In this area, the cover 110.1 is, for example frosted, so that no white light can escape to the outside. This is only in the optical range 220.1 possible, which is designed to be translucent.
  • FIG. 6A the circuitry for the power supply that is outside of the Refrigerator interior is arranged, shown.
  • the power connections 500.1, 500.2 is the mains voltage of 230 volts.
  • transformer 502 the Mains voltage to a voltage of 8.48 volts at output 504 to ground rechucked.
  • the transformer 502 is followed by a rectifier circuit 506 on.
  • the voltage applied to terminal 504 to ground is 8.48 volts to the lying in the interior of the refrigerator circuitry, the in Figure 6b is shown applied.
  • the circuit 508 serves to the light emitting diode 510.1, 510.2 with a constant current at the present constant voltage to supply, so that the LEDs 510.1, 510.2 always white light same Radiate brightness.
  • circuits shown in FIGS. 6A and 6B are Circuits is an LED light emitting diode with a power of one watt It is also possible to supply a constant current Circuit for powering a white light LED with high Performance which is a dimming, i. a stepless power setting of the LED allows to output. This is especially true for wine cabinets from Meaning, since wine refrigerators have a transparent glass door, and there a continuous dimming of the light should be made possible.
  • FIG. 7A is a block diagram of another embodiment of a circuit shown.
  • 602 designates the network connection, 604 the network filter and 606 the rectifier.
  • a transformer 608 connected to the rectifier is preferred outside of Refrigerator interior a transformer 608 connected.
  • the Transformer which is also referred to as a transformer, is itself through again controlled a so-called Simple Switcher 610.
  • a simple Switcher 610 designated component is preferably a Switching regulator TNY254 from the company Power Integrations, which belongs to a switching regulator families the output power up to a total load of max. Can achieve 10 watts, belongs.
  • the TNY254 used in the present embodiment may have a Output power of up to 4 watts and is thus in the operation of a 3 Watt Power - LED not yet operated to its power limit.
  • the Switching regulator TNY254 has a powerful internal power MOSFET - Switching transistor of a dielectric strength of up to 700V DC (DC).
  • the switching regulator TNY254 is a small - power switching regulator, which in direct mains operation with a wide input voltage range from 85V to 265V AC (AC voltage) can be supplied.
  • the voltage regulator TNY254 is powered by an internal 44KHz oscillator clocked and thus works extremely power failure free regarding EMC (Electromagnetic Compatibility), which is only inexpensive Net filter measures required.
  • the required output characteristics are passed through easy ON and OFF switching achieved. This eliminates the Transformer, d. H. at the transformer 608 another so-called bias winding.
  • the Self-consumption of the switching regulator is extremely energy efficient; it amounts to only 60/30 mW at 110 VAC / 230 VAC (AC voltage).
  • the TNY 254 switching regulator has an internal current limitation, one thermal overload device and undervoltage detection. Of the Switching regulator is preferred with a specially adapted thereto transformer KNY254-5-3 of the manufacturer Azurri akin.
  • the switching regulator TNY254 forms together with the transformer 608 in particular the transformer KNY254-5-3 a so-called "safety unit".
  • the switching regulator 610 also becomes the same in FIGS. 7B, 8A and 8B Reference number marked. Also in the case of FIGS. 7B, 8A and 8B related switching regulators 610 are, but are not limited to, to those of the type TNY254. Depending on the power of the LED, for example Switching regulator of similar type, eg. B. Switching regulator TNY253, TNY 255 of the Fa. Power Integrations are used.
  • the by the transformer or the Transformer 608 to a mains voltage of about 4 volts down-transformed voltage is on the other side of the transformer 608th rectified and smoothed in a circuit 612.
  • Embodiments will be a light-emitting diodes 614. with electric current provided.
  • the power of the LEDs is 3 watts.
  • the current or Voltage limiter is designated 615, the optocoupler 616.
  • FIG. 8A is the detailed circuit with the individual electronic Building components of a circuit based on a block diagram according to Figure 7A shown.
  • 704 denotes the section of the electrical Circuit corresponding to the line filter, 716 the primary controlled switching regulator, 718 the galvanic isolation, 720 the elements of the current and Voltage limitation. As well as 722 the filtering or smoothing of the voltage the LED (LED).
  • the circuit is described in detail below become.
  • the network input Voltage across a fuse 1000 and the following Line filter for balanced interference, consisting of the components capacitor 1002, 1004 and the throttle 1006 supplied.
  • the capacitors are Safety capacitors of the X1 or Y1 protection class. These are specially approved components for this application with tested DIN - Dielectric strength. These components protect the power grid against potential occurring interference pulses of the switching regulator.
  • the safety resistor 1000 destroyed itself at more than 10 times overcurrent.
  • varistor 1008 which is a voltage dependent resistor, which is the subsequent circuit of the Protects the mains side against overvoltage pulses (eg lightning, etc.). After that becomes the AC mains voltage with the rectifier 1010 to a DC voltage of 325V DC rectified during operation with 230 VAC.
  • One Electrolytic Capacitor 1012 (ELKO) smooths the "ripples" of the AC voltage to a pure DC voltage. Thus the Elko is not loaded too fast and In order to be damaged, the series resistor 1014 is in use.
  • the switching regulator is supplied via the primary winding of the transformer 608 and over the capacitor 1016 with voltage and now switches with its internal Power - FET the DC voltage in the 44 KHz - clock against its ground point.
  • This creates an electromagnetic alternating current field in the primary winding, that about the turn ratio of the transformer, that is the number of Windings primary and secondary, a galvanically isolated AC voltage couples to the output side of the transformer.
  • the selected transformer 608 about 3.3 to 6.0 VAC transfer. It draws its necessary output power from the parallel connection the two secondary windings. This is sufficient for the operation of the LED.
  • the emitting diode of the optocoupler 1036 changes its brightness with increasing voltage and blocks again the enable input of the switching regulator by the rising luminous flux 610, since only feedback is given by means of light. Due to the blocked enable input of the switching regulator, the switching regulator will suspend a few switching cycles so that the permissible output voltage is not exceeded. Thereafter, the output voltage is again smaller, the transmitter diode darker again and the switching regulator is enabled and clocks again until the permissible upper voltage limit is reached again. The control mechanism is done again. In the circuit according to the invention, however, the LED is only regulated to the maximum permissible current and not to the voltage, which is why the so-called "Sens resistors" 1038 and 1040 are also used.
  • the capacitor 1043 provides for the potential bonding between primary and Secondary side. It must have the same security requirements as those already meet described capacitors 1002 and 1004.
  • FIG. 7B shows the block diagram of a further alternative embodiment of FIG Invention, the dimming, d. H. a stepless power setting the LED allows. This is especially true for wine fridges from Meaning, since these often have a glass door and there a stepless Dimming of the light should be possible.
  • the dimming by further Components made. Essentially, this is done with another Field effect transistor 1100 and an optocoupler 1102 and a galvanic separate PWM 1104 (pulse width modulator) with which the brightness of the Power - LED can be steplessly dimmed.
  • PWM 1104 pulse width modulator
  • FIG. 8B analogous to FIG. 8A, a circuit is described in detail in FIG Figure 7 B shown circuit of a light emitting diode 614 (LED) shown with dimming. Same components as in FIG. 8A are given the same reference numerals characterized. The functioning of the components is detailed in the Description of Figure 8A described. The additional components are with the Reference numerals 1300, 1302, 1304, 1306, 1308 and 1310. she serve for stepless dimming of the LED 614.
  • Light-emitting diodes for example, two light-emitting diodes, which are parallel or in series are connected, be provided. This is apparent to the skilled person without inventive step.
  • the invention provides an improved for the first time Interior lighting for household appliances, in particular temperature control devices, such as For example, refrigerators, freezers, freezers or wine fridges to disposal.
  • the invention is also suitable for the interior lighting of herds, Beverage storage facilities, such as a beverage bar or for use in cooker hoods without being limited thereto.
  • the Invention is characterized on the one hand by a very high brightness yield a low power consumption, on the other Avoid high voltage lines inside the temperature control unit completely and the arrangement shows only a low heat radiation when switched on Light.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP04027051A 2003-11-21 2004-11-13 Eclairage intérieur pour appareil à conditionnement de température utilisant une diode électroluminescente (DEL) comme source lumineuse Withdrawn EP1533583A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE20318059U DE20318059U1 (de) 2003-11-21 2003-11-21 Innenbeleuchtung für Kühlgeräte mit LED
DE20318059U 2003-11-21
DE10358071 2003-12-10
DE10358071A DE10358071A1 (de) 2003-11-21 2003-12-10 Innenbeleuchtung für ein Temperiergerät mit einer Leuchtdiode als Lichtquelle

Publications (1)

Publication Number Publication Date
EP1533583A2 true EP1533583A2 (fr) 2005-05-25

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Application Number Title Priority Date Filing Date
EP04027051A Withdrawn EP1533583A2 (fr) 2003-11-21 2004-11-13 Eclairage intérieur pour appareil à conditionnement de température utilisant une diode électroluminescente (DEL) comme source lumineuse

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EP (1) EP1533583A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008135428A3 (fr) * 2007-05-08 2009-01-15 Bsh Bosch Siemens Hausgeraete Éclairage pour un appareil réfrigérant à porte transparente
DE102013001623A1 (de) * 2013-01-30 2014-07-31 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und /oder Gefriergerät

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008135428A3 (fr) * 2007-05-08 2009-01-15 Bsh Bosch Siemens Hausgeraete Éclairage pour un appareil réfrigérant à porte transparente
RU2469248C2 (ru) * 2007-05-08 2012-12-10 Бсх Бош Унд Сименс Хаусгерете Гмбх Освещение холодильного аппарата с прозрачной дверкой
CN101842652B (zh) * 2007-05-08 2013-05-29 Bsh博世和西门子家用器具有限公司 用于具有透明的门的制冷装置的照明装置
DE102013001623A1 (de) * 2013-01-30 2014-07-31 Liebherr-Hausgeräte Ochsenhausen GmbH Kühl- und /oder Gefriergerät

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