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Refrigerating unit

A refrigeration unit and refrigerant technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of complex control system and high cost of refrigeration units, avoid large mechanical loss of bearings, improve service life, and simplify pipeline systems Effect

Inactive Publication Date: 2016-11-09
CHONGQING MIDEA GENERAL REFRIGERATING EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of this kind of compressor is high, and the control system of the refrigeration unit is complicated; in order to prevent the damage caused by the direct friction between the rotor shaft and the magnetic suspension bearing caused by the disappearance of the magnetic force in the case of an emergency power failure of the refrigeration unit, it is necessary to configure a spare bearing

Method used

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  • Refrigerating unit

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Embodiment Construction

[0027] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular ...

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Abstract

The invention discloses a refrigerating unit which comprises an oilless centrifugal compressor, an evaporator and a condenser, wherein a refrigerant circulating flow path is composed of the oilless centrifugal compressor, the evaporator and the condenser. The oilless centrifugal compressor comprises a motor, a plurality of sets of bearings and impellers. A rotor shaft of the motor is sleeved with the bearings. The impellers are arranged on the rotor shaft and driven by the rotor shaft to rotate. The refrigerating unit further comprises a refrigerant pump and a control device. The refrigerant pump is used for conveying a refrigerant. An outlet of the refrigerant pump corresponds to each bearing so as to supply the refrigerant serving as lubricating liquid to each bearing. An inlet of the refrigerant pump is connected with at least one of the evaporator and the condenser. The control device is connected with the refrigerant pump and the oilless centrifugal compressor. According to the refrigerating unit, a function of lubricating the bearings can be achieved, so that the service life of the bearings is prolonged; and in addition, the structure is simple, and a control system of the refrigerating unit is simplified, so that the failure rate of the control system is decreased, and the cost the oilless centrifugal compressor is reduced.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a refrigeration unit. Background technique [0002] Generally, centrifugal refrigeration units are divided into two types, oil-free and oil-free centrifugal refrigeration units, depending on whether the bearings of the compressor use lubricating oil to lubricate and cool the bearings. [0003] The compressor in the oil-filled centrifugal refrigerating unit in the related art adopts a dynamic pressure oil film sliding bearing or an oil-lubricated rolling bearing to support the shaft, and at the same time, a transmission gear is designed in the compressor to drive the impeller to rotate through gear transmission, resulting in high noise. In the process of using lubricating oil to lubricate the bearing, on the one hand, due to the relatively high viscosity of the lubricating oil, the mechanical loss of the rotor shaft is large when the bearing rotates at high speed, on the oth...

Claims

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Application Information

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IPC IPC(8): F24F5/00F25B49/02F25B41/06F25B31/00F25B41/30
CPCF24F5/001F25B31/00F25B49/02F24F5/00
Inventor 吴昕李镇杉王永辜永刚
Owner CHONGQING MIDEA GENERAL REFRIGERATING EQUIP
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