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
  • 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
  • F25D2400/08—Refrigerator tables
• • 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
  • F25D2400/34—Temperature balancing devices
• • 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
  • F25D2700/00—Means for sensing or measuring; Sensors therefor
  • F25D2700/10—Sensors measuring the temperature of the evaporator

Definitions

• the invention relates to a cooling device with a compressor and at least two evaporators arranged in series and having a different cooling capacity for cooling cold compartments of different temperatures, of which a lighting device and a temperature sensor is arranged in the compartment of higher temperature, which is at least approximately corresponding to the temperature of the compartment , a signal supplied to a control device.
• Refrigerators of the type mentioned at the outset with a normal refrigerator compartment and a *** or **** freezer compartment, are equipped with a single-circuit refrigerator, the refrigerant compressor of which is in most cases controlled by a so-called constant-on controller arranged in the refrigerator compartment .
• the compressor is switched off when a temperature set on the controller and tapped on the refrigerator compartment evaporator by means of a temperature sensor is reached, and is restarted after an upper temperature limit ensuring defrosting of the refrigerator compartment evaporator is reached.
• the temperature prevailing in the freezer compartment depends both on the set temperature in the refrigerator compartment set in the controller and on the heat input into this compartment.
• the invention has for its object to provide a heating device for cooling devices according to the preamble of claim 1, with which the disadvantages of the prior art are avoided and with which the temperature in a simple manner tur control of the cooling units mentioned is improved with different heat input.
• the lighting device serves as a heating device and this can be preceded by a series resistor designed as a capacitor, by means of which the power output of the lighting device is reduced.
• the solution according to the invention provides a heating device which significantly improves the temperature control of cooling devices operated with single-circuit refrigerating machines with *** or **** freezer compartments at lower ambient temperatures of the devices, the range of which can be used by simply adapting the capacitor serving as a series resistor to different heat incidence in the refrigerator compartment freezers is expanded.
• the use of a capacitor as a series resistor for the lighting device operated as a heating device ensures that, in addition to the heating device, there is no heating source which contributes to raising the refrigerator compartment temperature, since no thermal output drops at the capacitive series resistor.
• a capacitive series resistor enables the use of commercially available conventional incandescent lamps for heating purposes in the event that only a very low heating output, for example approximately 5 watts, is required for temperature control in certain device types.
• a very low heating output for example approximately 5 watts
• the capacitor can be switched by a switch in a circuit in which the capacitor is connected upstream of the lighting device as a series resistor. Such a possibility ensures that the lighting device is only operated as a heating device if the ambient temperatures of the cooling device make this necessary.
• a switch is particularly easy to use and easy to form if, according to a next preferred embodiment of the subject matter of the invention, it is provided that the switch is designed as a manually operated switch.
• a particularly expedient design for a capacitor results if, according to a next preferred embodiment of the subject of the invention, it is provided that the capacitor has a capacitance of 100 nF to 1 ⁇ F, but preferably has a capacitance of 680 nF.
• the temperature sensor detects the temperature of the evaporator in the higher temperature compartment.
• the temperature in the compartment of higher temperature is recorded particularly precisely if, according to an alternative embodiment of the subject of the invention, it is provided that the temperature sensor detects the temperature of the cooling compartment air in the compartment of higher temperature.
• Fig. 1 a equipped with a * ** freezer table refrigerator with a lighting device designed as a regulator-lamp combination, in a spatial view from the front and Fig. 2 plan the lighting device in a circuit suitable for its operation as refrigerator lighting and as a heating device.
• a household table refrigerator 10 is shown, on the heat-insulating housing 11, a door 12 is attached.
• the heat-insulating housing 11 serves to accommodate a *** freezer compartment 13, which can be closed with a freezer compartment door 14 which can be pivoted about a vertical axis.
• the normal cooling compartment 15 and the freezer compartment 13 are each cooled by an evaporator, not shown, which are arranged in series in the refrigerant circuit and acted on by a single refrigerant compressor with refrigerant.
• the temperature in the normal cooling compartment 15 and in the freezer compartment 13 can be adjusted by a control device which is arranged on the side wall 16 of the normal cooling compartment 15 and which is designed as a so-called constant-on regulator and is part of a regulator-lamp combination 18.
• a control device which is arranged on the side wall 16 of the normal cooling compartment 15 and which is designed as a so-called constant-on regulator and is part of a regulator-lamp combination 18.
• this is provided with a temperature sensor (not shown), which senses the temperature of the refrigerator compartment evaporator, and a rotary knob 19, which is arranged in its area near the door and serves to set the temperature.
• the area of the regulator / lamp combination 18 which is remote from the door comprises a section which serves as the lighting device 20 and which is equipped with an incandescent lamp (not shown).
• the lighting device 20 is located in a circuit 21, which is fed by a 230 V AC voltage present at the input poles 22 of the circuit 21.
• a first switch 23 is arranged in series with the lighting device 20, which is part of the regulator / lamp combination and which is actuated by the door 12, the switch 23 being in its open position I when the door 12 is closed, while it is in the open position when the door 12 is open is in its closed position II and thus enables the power supply to the lighting device 20.
• a capacitor 24 is arranged in the circuit 21, in series connection with the lighting device 20, which capacitor serves as a series resistor for operating the lighting device 20 as a heating device and which can be switched into the circuit 21 via a second switch 25.
• the switch 25 can be designed both as a manually operated switch, which is then brought into its closed position II by an operator of the table refrigerator 10 when the ambient temperature of the table refrigerator drops below a preset value and the natural incidence of heat in the normal refrigerator compartment 15 is thus significantly reduced.
• the incandescent lamp of the lighting device is operated as a heating device when the door 12 is closed and is energized via the capacitor 24 serving as a series resistor, whereby the power output and thus its heating effect is reduced by the voltage drop across the capacitor 24.
• the switch can also be used as an electronic switch, e.g. Thyristor or triac can be formed, which is controlled via a corresponding control circuit.
• This is the input signal, for example, the signal of a temperature sensor that detects the ambient temperature of the table refrigerator 10, so that the switch, which is designed as a triac or thyristor, is closed when the ambient temperature drops below a certain preset value and the light bulb of the lighting device 20 is thus operated as a heating device.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Crystals, And After-Treatments Of Crystals (AREA)
• Polarising Elements (AREA)
• Inorganic Insulating Materials (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=8039817

Family Applications (1)

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Cited By (3)

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Citations (3)

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• 1997
  • 1997-04-30 DE DE29707866U patent/DE29707866U1/de not_active Expired - Lifetime
• 1998
  • 1998-04-28 EP EP98929270A patent/EP0979376B1/de not_active Expired - Lifetime
  • 1998-04-28 TR TR1999/02391T patent/TR199902391T2/xx unknown
  • 1998-04-28 DE DE59804814T patent/DE59804814D1/de not_active Expired - Lifetime
  • 1998-04-28 WO PCT/EP1998/002515 patent/WO1998049507A1/de active IP Right Grant
  • 1998-04-28 ES ES98929270T patent/ES2181236T3/es not_active Expired - Lifetime

Patent Citations (3)

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