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US 11,994,136 B2Granted
Power electronics cooling arrangement
AssigneeDanfoss A/S
InventorsLin Xiang Sun, Brandon Keith Pritchard
Life of this patent
Estimating the term…
Abstract
A refrigerant compressor includes, among other things, a first stage and a second stage downstream of the first stage, and a cooling line configured to cool power electronics. The cooling line is configured to be switched between a first mode and a second mode. The first mode is configured to dump refrigerant between the first stage and the second stage, and the second mode is configured to dump refrigerant upstream of the first stage.
Claims19
A refrigerant compressor, comprising:
- a first stage and a second stage downstream of the first stage;
- and
- a cooling line configured to cool power electronics, the cooling line configured to be switched between a first mode and a second mode, wherein the first mode is configured to dump refrigerant between the first stage and the second stage, and the second mode is configured to dump refrigerant upstream of the first stage, wherein the refrigerant compressor is configured such that, during operation of the refrigerant compressor, cooling fluid flows through the cooling line to cool the power electronics when the cooling line is in either the first mode or the second mode.
A refrigerant system, comprising:
- a main refrigerant loop in communication with a condenser, an evaporator, and a compressor, the compressor having a first stage and a second stage downstream of the first stage;
- and
- a cooling line, wherein the cooling line is configured to draw cooling fluid from the main refrigerant loop, direct cooling fluid relative to power electronics of the compressor, and then direct cooling fluid back to the main refrigerant loop to one of at least two locations via a juncture of the cooling line, wherein the juncture is downstream of the power electronics and upstream of the main refrigerant loop, wherein the cooling line is configured to be switched between a first mode and a second mode, wherein, when the cooling line is in the first mode, the cooling line is configured to dump refrigerant to a first location of the at least two locations, wherein the first location is between the first stage and the second stage, wherein, when the cooling line is in the second mode, the cooling line is configured to dump refrigerant to a second location of the at least two locations, and wherein the second location is upstream of the first stage.
Dependencies are inferred from the claim text.