Method for power regulation of a defroster heater and refrigeration device with integrated defroster heating
A heating device and refrigeration device technology, which is applied in the field of power regulation of defrosting heating devices and refrigeration devices with integrated defrosting heating devices, can solve the problem of increased ice volume, adverse effects on the functional capabilities of refrigeration devices, and cooling devices Economic adverse effects and other issues
Inactive Publication Date: 2008-04-30
BSH BOSCH & SIEMENS HAUSGERAETE GMBH
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Problems solved by technology
[0005] If the supply voltage is too low, it can happen that the predetermined defrost duration is not enough for a complete defrost, so that the ice volume always increases after several defrost cycles, which is detrimental to the functional capacity of the refrigeration unit influences
[0006] If the duration of the defrost is predetermined so that complete defrost is guaranteed even when the supply voltage is at the minimum value within the permissible value range, then when the supply voltage is high, more heat will be released than actually required for defrosting , and then the heat must be discharged again through the refrigerator several times, which adversely affects the economy of the refrigeration device
Method used
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Embodiment Construction
[0022] figure 1 A frost-free refrigerator on which the invention is realized is shown very schematically. The refrigerating device comprises, in a conventional manner, an insulated housing 1 in which a storage room 2 for cold storage is formed and a storage room 2 separated from the storage room 2 by a partition wall 3 through a Some of the orifices 4 communicate with the evaporator chamber 5 . In the evaporator chamber 5 there are a plate-shaped evaporator 7 supplied with refrigerant through a refrigerator and a defrosting heater 8 which is in close contact with the evaporator.
[0023] The defrosting heating device 8 can supply heating current under the control of the control circuit 10 through an interrupter 9 . The defrost heater 8 is connected via terminal 11 in parallel with the refrigerator 6 to a power supply line, the nominal power supply voltage of which is here 230 V AC (230 VAC). The interrupter 9 is preferably a high power transistor or a thyristor.
[0024] T...
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The invention relates to a refrigeration device with integrated defroster heating (8), provided with a recording circuit (10, 12) for recording a voltage value at a supply connector (11) for the defroster heating (8) and for generation of a keyed control signal with a repetition rate dependent on the recorded voltage value and an interrupter (9) for the supply power supplied to the defroster heating (8) operated by the control signal. The repetition rate for the supply power is set with relation to the recorded voltage value in order to limit power variations for the defroster heating caused by voltage variations.
Description
technical field [0001] The invention relates to a method for regulating the output of a defrost heater of a refrigerator as a function of the supply voltage of the defrost heater and to a refrigerator with an integrated defrost heater, in particular for carrying out the method. Background technique [0002] In refrigeration devices, such as refrigerators, for example, there is a problem of ice forming on the refrigerated evaporator. This ice acts as an insulator, making cold exchange between the evaporator and the cooling chamber difficult. For this reason, the ice must be removed from time to time. For this purpose, many refrigeration units, in particular so-called no-frost units, have defrost heaters. [0003] Such a defrost heater is controlled, for example, by means of an ice sensor in such a way that the defrost process is carried out if the detected amount of ice exceeds a limit value, and is interrupted if no more ice is detected. However, such ice sensors are expe...
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IPC IPC(8): F25D21/08F25D21/00
CPCF25D21/006F25B2700/15F25D21/08
Inventor 伊利亚斯·马内塔斯格奥尔格·施特劳斯
Owner BSH BOSCH & SIEMENS HAUSGERAETE GMBH