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Systems and methods for improving energy efficiency in cooling plant compressors

A technology for cooling equipment in compressors, applied in emergency protection circuit devices for limiting overcurrent/overvoltage, refrigerators, refrigeration and liquefaction, etc., can solve problems such as inability to increase the efficiency of frequency inverters

Active Publication Date: 2015-11-25
EMPRESA BRASILEIRA DE COMPRESSORES SA (EMBRACO)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this solution does not increase the efficiency of the frequency inverter because the relay bobbin will have losses in order to keep the contacts closed

Method used

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  • Systems and methods for improving energy efficiency in cooling plant compressors
  • Systems and methods for improving energy efficiency in cooling plant compressors
  • Systems and methods for improving energy efficiency in cooling plant compressors

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Embodiment Construction

[0034] exist figure 2 and 3 A system for increasing energy efficiency in a compressor of a cooling plant according to the first and second preferred embodiments of the present invention is schematically shown in , respectively. The system has at least a frequency inverter with a main circuit 10 and an electrical energy source FAC electrically associated with each other. Preferably, the compressor is constituted by a variable capacity compressor, but other types of compressors may be used.

[0035] as in figure 2 and 3 As can be seen in , the main circuit 10 of the frequency inverter includes at least a wave rectifier 4 .

[0036] In addition, the main circuit 10 of the frequency inverter also comprises at least a bus capacitor CB electrically connected in parallel to the wave rectifier 4 , capable of being charged by a charging current.

[0037] In addition, the main circuit 10 of the frequency inverter comprises at least a passive part P electrically associated to the ...

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Abstract

The present invention refers to a system for streamlining energy efficiency, for application in cooling equipment compressors. Said system has at least a main circuit of the frequency inverter (10) and an electric energy power source (FAC) electrically associated to each other. The main circuit of the frequency inverter (10) comprises at least a wave rectifier (4). In addition, the main circuit of the frequency inverter (10) comprises at least a bus capacitor (CB), electrically associated in parallel to the wave rectifier (4) and to the compressor, electrically chargeable by a charge current. Additionally, the main circuit of the frequency inverter (10) comprises at least a passive component (P), electrically associated to the wave rectifier (4), capable of reducing a charge current of the bus capacitor (CB) and / or attenuating the harmonic content of an input current coming from the electric energy power source (FAC). Said system comprises at least a means of obtaining power in an input of the main circuit of the frequency inverter (10). Further, said system comprises at least a control unit (3) operatively associated to the means for obtaining power. Said main circuit of the frequency inverter (10) is provided with an active switch (K) electrically associable in parallel to the passive component (P), and the control unit (3) is arranged so as to permit the drive of the active switch (K) based on the power at the input of the main circuit of the frequency inverter (10). The present invention also refers to a method of streamlining energy efficiency, for application in cooling equipment compressors.

Description

technical field [0001] The present invention relates to a system and method capable of improving the efficiency of electrical energy consumption of cooling equipment by reducing energy loss when operating at low power. Background technique [0002] Typically, variable capacity compressors are used in domestic and commercial cooling equipment to help meet the most demanding energy efficiency requirements known today. This cooling capacity variation is provided by variation of the rotational speed of the electric motor capable of pumping coolant gas to the cooling circuit. This variation is allowed by means of a frequency inverter, which usually consists of an electronic circuit basically having two main stages responsible for processing the energy. In the first stage, the alternating current of the power grid is converted into a direct current voltage called the CC bus. as in Figure 1a and 1b As can be seen in , this conversion is performed in the most simplified manner v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/00F25B49/02F25D29/00
CPCH02M7/062F25B2600/021H02H9/001Y02B30/741Y02B30/70
Inventor G.J.马斯
Owner EMPRESA BRASILEIRA DE COMPRESSORES SA (EMBRACO)
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