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Air conditioning system

An air-conditioning system, transistor technology, applied in the direction of output power conversion device, electrical components, AC power input conversion to DC power output, etc., can solve the problem of inability to control the power factor of the power grid, the inability to realize the exchange of energy in the power grid system, and the inability to increase power factors, suppression of harmonics, etc.

Active Publication Date: 2015-07-22
GREE ELECTRIC APPLIANCES INC
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AI Technical Summary

Problems solved by technology

[0002] In the existing frequency conversion air conditioning system, uncontrollable power electronic components are used in the rectification part, and the system energy exchange with the grid cannot be realized. Especially in the state of motor braking, the motor becomes a generator and is in the power generation state. The electricity generated can only be stored on the capacitor on the DC side, which is easy to damage the capacitor and affect the operation of the system
At the same time, such a system cannot control the power factor of the grid side, improve the power factor, and suppress harmonics.

Method used

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the air conditioning system of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] refer to figure 1 , an embodiment of the air conditioning system of the present invention includes power conversion units A1, B1, C1 and converters;

[0020] The input ends of the power conversion units A1, B1, and C1 are connected to the three-phase AC power supply, the three-phase Y connection, the neutral point is n, the input ends of the converters are connected to the output ends of the power conversion units A1, B1, and C1, The output terminal of the converter outputs a DC voltage for connecting a load, the load being a compressor or / and a fan motor, where...

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Abstract

The invention provides an air conditioning system, which comprises a power conversion unit and a converter, wherein the input end of the power conversion unit is connected with a three-phase AC power supply; the input end of the converter is connected with the output end of the power conversion unit; and the output end of the converter outputs DC voltage for being connected with a load. According to the air conditioning system, power factors at the grid side can be controlled in unit power factors.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to an air conditioning system for braking energy feedback. Background technique [0002] In the existing frequency conversion air conditioning system, uncontrollable power electronic components are used in the rectification part, and the system energy exchange with the grid cannot be realized. Especially in the state of motor braking, the motor becomes a generator and is in the power generation state. The electricity generated can only be stored in the capacitor on the DC side, which is easy to damage the capacitor and affect the operation of the system. At the same time, such a system cannot control the power factor of the grid side, improve the power factor, and suppress harmonics. Contents of the invention [0003] In view of the status quo of the prior art, the purpose of the present invention is to provide an air-conditioning system to realize controllable power factor at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/797
CPCH02M7/797
Inventor 邹金龙褚川川吴超奚明耀
Owner GREE ELECTRIC APPLIANCES INC
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