Refrigerator system for store

Abstract

The present invention relates to a refrigerator system for shops, which can be operated according to the load capacity, and can precisely control the temperature fluctuation in the horizontal plane to be extremely small, can reduce noise and space, and is convenient for trial operation, Repair and troubleshoot. A screw compressor without reciprocating motion is used. It is installed in the mechanical room, and controls the speed of the compressor by detecting the operating suction pressure and changing the inverter frequency. It can judge faults, such as abnormal temperature rise of the converter; when a fault occurs, it can be switched to commercial power. The pressure and temperature of each part that reflect the operating status are displayed digitally, and the cause of abnormal stop is also displayed.

Description

[0001] The present invention is a divisional application of an invention patent application filed on March 29, 1996, with the application number 96102801.7 and the invention title "Refrigerator System for Stores". Technical field [0002] The present invention relates to a refrigerator system for stores; more specifically, it relates to a refrigerator suitable for connecting 5 to 7 small-capacity showcases (refrigerated cabinets) to a refrigerator System, as seen in convenience stores. Background technique [0003] As an example, a system is described in Japanese Patent Laid-open No. 60-175970. In this system, an air-cooled condenser section is installed outdoors, a compressor section is installed in the indoor machine room, and An inverter is used to change the speed of the compressor to control its capacity to suppress the decrease in its refrigeration capacity. [0004] Many prior art refrigerator systems use an inverter and a reciprocating compressor with reciprocating motion,...

AI Technical Summary

Problems solved by technology

Therefore, it cannot operate fully and precisely with high accuracy over a wide range of capacities;

[0006] (2). Although the high-pressure discharge gas discharged from the compressor fluctuates greatly, the fluctuation is sometimes further amplified when the compressor speed is changed by the converter

Therefore, there are many restrictions in arranging the refrigerant pipes in order to prevent the sound of refrigerant gas flow inside the refrigerant pipes, and the vibration of the pipe itself; and

[0007] (3). Although the vibration and noise of the compressor itself are large, the vibration and noise are further amplified when the converter is used to change its speed

Therefore, there are many restrictions on the location of the machine room, installation in urban residential areas, and operation at night.

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