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Continuous compressor envelope protection

A compressor and pressure technology, applied in the direction of compressors, irreversible cycle compressors, refrigerators, etc., can solve the problem of low discharge pressure and temperature

Inactive Publication Date: 2011-06-22
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for example when the engine is idling, the compressor will be driven at a relatively low speed, so that the discharge pressure and temperature will be relatively low

Method used

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  • Continuous compressor envelope protection
  • Continuous compressor envelope protection
  • Continuous compressor envelope protection

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Embodiment Construction

[0010] The invention is figure 1 10 in general, including a generator 11 driven by power from the vehicle engine, a converter 12 receiving an unregulated voltage from the generator 11, receiving regulated power regulated by the converter 12 (i.e. voltage and frequency), a tank 14 that receives cooled air from the vapor compression system 13, and a controller 16 that receives tank temperature measurements from tank 14 along line 17 (i.e., returns Air Temperature, RAT) and receives pressure and temperature measurements from vapor compression system 13 along line 18 for controlling transducer 12 via line 19 . Controller 16 also sends a cooling demand signal to vapor compression system 13 via line 21 . exist figure 2 A more detailed schematic of the system is shown in .

[0011] Consider first the vehicle itself and its surroundings, including a drive motor 22, a battery 23, a backup power source 24, and a cabinet with a door 26 that opens occasionally. Both air and heat are ...

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Abstract

A transport refrigeration system is provided with a control apparatus including an inverter and a microprocessor, with the microprocessor receiving signals representative of sensed values of the compressor discharge temperature and pressure, as well as the suction pressure, and controlling the inverter to responsively provide a selective level of electrical voltage and frequency to the compressor in order to maintain a desired compressor envelope.

Description

technical field [0001] The present application relates generally to transport refrigeration systems and, more particularly, to controlling compressor motor drives in vapor compression systems thereof. Background technique [0002] Transport refrigeration systems are commonly used in refrigerated trucks, truck trailers and containers to preserve perishable goods during transport from one location to another. Such systems include the necessary components for a vapor compression cycle, including a compressor, which must include some type of drive device. For containers and truck trailers, this function is usually provided by a dedicated internal combustion engine whose speed is selectively varied to maintain the desired compressor envelope. But in refrigerated trucks and vans, the compressor is usually located in the main engine drive compartment, and the compressor is then driven by connecting directly to the main engine drive. The tubing then functions to provide closed loo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00
CPCF25B2700/21152B60H2001/3292F25B2600/021B60H2001/325F25B2700/21171B60H2001/3257B60H1/3232F25B2700/1933F25B49/022F25B2700/1931
Inventor G.唐纳S.瓦里冈达S.米亚诺维克
Owner CARRIER CORP