Compressor for heat exchange system, heat exchange system and method for controlling operation of compressor

A heat exchange system, comprising:

• a compressor having:
• a drive device for driving the compressor and having at least a first working condition and a second working condition,
• an output power of the drive device under the second working condition being greater than the output power of the drive device under the first working condition,
• wherein the compressor has at least one upload/download flow path, which is configured to be opened before the drive device is switched from the first working condition to the second working condition, to reduce a suction flow of the compressor until current operating parameters of the compressor reach preset values, after the compressor reaches the preset values, the upload/download flow path is controlled to increase the suction flow until the compressor is in a required working state in the second working condition;
• wherein the at least one upload/download flow path comprises a slide valve cavity housing a compressor slide valve, a first pipeline communicating with the slide valve cavity and a suction cavity of the compressor, and a first valve disposed in the first pipeline, the first valve configured to be opened to allow fluid through the at least one upload/download flow path or closed to block fluid through the at least one upload/download flow path, wherein the at least one upload/download flow path directly fluidly connects the slide valve cavity with the suction cavity of the compressor.

A method for controlling operation of a compressor, the compressor having a drive device for driving the compressor and having at least a first working condition and a second working condition, an output power of the drive device under the second working condition being greater than the output power of the drive device under the first working condition, wherein the compressor has at least one upload/download flow path, which is configured to be opened before the drive device is switched from the first working condition to the second working condition, to reduce a suction flow of the compressor until current operating parameters of the compressor reach preset values, after the compressor reaches the preset values, the upload/download flow path is controlled to increase the suction flow until the compressor is in a required working state in the second working condition, the method comprising:

• operating the drive device for driving the compressor for the heat exchange system under the first working condition;
• opening the upload/download flow path of the compressor before the drive device needs to be switched from the first working condition to the second working condition, to reduce the suction flow of the compressor;
• monitoring whether the current operating parameters of the compressor have reached preset values;
• and
• after the compressor reaches the preset values, increasing the suction flow of the compressor by controlling the upload/download flow path until the compressor is in a required working state in the second working condition;
• wherein the at least one upload/download flow path comprises a slide valve cavity housing a compressor slide valve, a first pipeline communicating with the slide valve cavity and a suction cavity of the compressor, and a first valve disposed in the first pipeline, the first valve configured to be opened to allow fluid through the at least one upload/download flow path or closed to block fluid through the at least one upload/download flow path, wherein the at least one upload/download flow path directly fluidly connects the slide valve cavity with the suction cavity of the compressor.