Middle and low temperature integrated type refrigerated storage / refrigerating system with air discharging and defrosting functions

A refrigeration system, integrated technology, applied in the direction of defrosting, compressors with multiple evaporators, refrigerators, etc., can solve the problems of low refrigeration efficiency and large energy consumption, and achieve improved operation stability and improved operation Efficiency and ease of use

Inactive Publication Date: 2009-04-22
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when the independent medium-temperature refrigeration system and low-temperature refriger

Method used

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  • Middle and low temperature integrated type refrigerated storage / refrigerating system with air discharging and defrosting functions
  • Middle and low temperature integrated type refrigerated storage / refrigerating system with air discharging and defrosting functions
  • Middle and low temperature integrated type refrigerated storage / refrigerating system with air discharging and defrosting functions

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Experimental program
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Embodiment Construction

[0023] The specific implementation manners of the present invention will be described in further detail below with reference to the accompanying drawings.

[0024] Fig. 3A shows a schematic structural view of an exhaust defrosting system when a normal refrigeration cycle is performed, and Fig. 3B shows a structural schematic view of the exhaust defrosting system when an exhaust defrosting operation is performed. Referring to FIG. 3A and FIG. 3B , the exhaust gas defrosting system mainly includes a medium temperature compressor, a low temperature compressor, a medium temperature evaporator, a low temperature evaporator and control valves 1 to 5 . In Fig. 3A and Fig. 3B, the part indicated by the dotted line represents the refrigerant pipeline which does not participate in the circulation in the respective working state, and the part indicated by the solid line represents the refrigerant pipeline which participates in the circulation in the respective working state . It can be ...

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Abstract

The invention discloses a moderate-and-low temperature integrated cold storage/refrigeration system with the function of exhaust and defrosting. The system comprises a moderate-and-low temperature compressor unit, a moderate-and-low temperature evaporator, control valves, a regulating valve, a one-way valve and an expansion valve; and switchover control is carried out between the refrigeration circulation and the defrosting circulation by the action combination of a plurality of control valves. The invention also discloses a method for switching between two working states in the system. When a first control valve is open, a second control valve is closed, and a fourth control valve is closed to the refrigerant pipeline of a liquid receiver, refrigeration circulation is carried out; when the first control valve is closed, the second control valve is open, and the fourth control valve is closed to the refrigerant pipeline of an inter cooler, exhaust and defrosting are carried out. By adopting the system and the switchover method in the invention, the refrigeration circulation and the exhaust and defrosting circulation are realized, and the heat exchange between a moderate temperature system and a low temperature system can be used for improving the operating efficiency of the entire system.

Description

technical field [0001] The invention relates to a refrigerating / freezing display cabinet system, in particular to a medium and low temperature integrated refrigerating / freezing display cabinet system for displaying food and / or beverage products. Background technique [0002] In general, supermarkets and convenience stores are equipped with many display cabinets, which can be open or can have doors, for presenting fresh food or drinks to customers and keeping fresh food or drinks at a certain temperature Environment. As air source heat pumps or air coolers in refrigeration systems operate at ambient temperatures near or below the freezing point of water, frost builds up on the heat-absorbing heat exchanger (also called the "evaporator"), causing heat exchange The heat transfer efficiency of the device decreases, and even the performance of the entire system decreases. The most conventional defrosting methods include electric defrosting and exhaust defrosting. More specifica...

Claims

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Application Information

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IPC IPC(8): F25B49/02F25B41/04F25B31/00F25B5/00
CPCF25B1/10A47F3/0482F25B41/04F25D21/006F25D11/022F25B47/022F25B5/02F25B2400/075F25B2400/13F25B2400/22F25B41/20F25B41/24
Inventor 顾众何志伟段传学
Owner CARRIER CORP
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