Method for controlling operation of volume-controlled spiral freezing device
A refrigeration device and capacity control technology, which can be used in household refrigeration devices, refrigerators, refrigeration components, etc., and can solve problems such as loss
Inactive Publication Date: 2012-03-21
SANYO ELECTRIC CO LTD
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[0004] However, although there is an abnormality, usually, the freezer is stopped and it takes time to recover, and the frozen food stored in the freezer, such as fresh food such as fish or ice cream, is damaged, causing losses on the user side of the freezer with the freezer.
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[0028] Hereinafter, the present invention will be described in more detail with reference to the drawings. figure 1 As an example of a screw compressor, it is a refrigerating apparatus including only one two-stage screw compressor 10 having a low-pressure part 10a, an intermediate-pressure part 10b, and a high-pressure part 10c. The refrigerant gas sucked into the low-pressure part 10a via the suction pipe 12 is discharged from the high-pressure part 10c after being compressed by the compressor 10 . The refrigerant gas mixed with the oil used in the compressor 10 to maintain the airtightness of compression is discharged, and flows into the oil separator 16 through the discharge pipe 14. Here, after the oil in the refrigerant gas is removed, the refrigerant gas is refrigerated. The agent gas flows into the condenser 20 via the pipe 18. The refrigerant liquid condensed and liquefied in the condenser 20 temporarily flows into the storage tank 24 through the pipe 22 , and then pa...
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The invention provides a method for controlling the operation of a volume-controlled spiral freezing device, which is therefore not stopped but prevented from being stopped as far as possible even when the pressure at the high-pressure side is abnormally increased. The volume-controlled spiral freezing device has a spiral compressor, a low-pressure-side pressure sensor for detecting the pressure at the refrigerant absorbing side of the spiral compressor, that is, the low-pressure side, and a high-pressure-side pressure sensor for detecting the pressure at the refrigerant discharging side, that is, the high-pressure side. The volume-controlled spiral freezing device has the operation modes of the full-load operation mode, the unloading operation mode which makes the freezing ability decreased relative to the full-load operation mode, and the stop mode. If the high-pressure-side pressure value (PH) detected by the high-pressure-side pressure sensor exceeds a set value (P1) and continuous for the first set time (t1), then the volume-controlled spiral freezing device is controlled to forcibly perform the unloading operation during the second set time (t2).
Description
technical field [0001] The present invention relates to an operation control method of a capacity control type spiral refrigeration device. Background technique [0002] In a refrigeration system using a capacity-controlled screw compressor, for example, if the condenser for the refrigerant is an air-cooled condenser using a plurality of fan motors, some problems may occur in some of the fan motors If the number of revolutions is insufficient or stopped, the cooling by the refrigerant condenser becomes insufficient. In this case, the refrigerant discharge side pressure (high pressure side pressure) of the screw compressor increases excessively. In addition, cooling becomes insufficient due to clogging of the condenser, etc., and similarly, the pressure on the high pressure side of the screw compressor increases excessively. In the above case, if the high-pressure side pressure value exceeds a predetermined value, conventionally, the only method that can be taken is to stop...
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Login to View More IPC IPC(8): F25B49/02F25D29/00
Inventor 宫本善至雄山口勤
Owner SANYO ELECTRIC CO LTD