US-20260124880-A1 - USE OF A TEMPERATURE MEASUREMENT POINT IN A COMPRESSOR TO CONTROL A TEMPERATURE OF A REFRIGERANT CIRCUIT, METHOD FOR CONTROLLING A TEMPERATURE OF A REFRIGERANT CIRCUIT, COMPRESSOR AND VEHICLE

Abstract

A use of at least one temperature measurement point in a compressor to control a temperature of a refrigerant circuit, wherein the temperature measurement point is used between power electronics of the compressor, around which power electronics a refrigerant flowing into the compressor flows and which power electronics are cooled by the refrigerant, and a compressor stage, which is downstream of the power electronics in the flow direction of the refrigerant. A method for controlling a temperature of a refrigerant circuit, to a compressor and to a vehicle.

Inventors

• Gerhard Eser
• Sebastian Brettner
• Manuel Dillinger
• Markus Feulner

Assignees

• Schaeffler Technologies AG & Co. KG

Dates

Publication Date

20260507

Application Date

20231012

Priority Date

20221014

Claims (20)

1. 1 . (canceled)
2. 2 . (canceled)
3. 3 . (canceled)
4. 4 . (canceled)
5. 5 . (canceled)
6. 6 . (canceled)
7. 7 . (canceled)
8. 8 . (canceled)
9. 9 . (canceled)
10. 10 . (canceled)
11. 11 . (canceled)
12. 12 . (canceled)
13. 13 . The use of at least one temperature measurement point in a compressor to control a temperature of a refrigerant circuit, wherein the temperature measurement point is used between power electronics of the compressor, around which power electronics a refrigerant flowing into the compressor flows and which power electronics are cooled by said refrigerant, and a compressor stage, which is downstream of the power electronics in the flow direction of the refrigerant.
14. 14 . The use of claim 13 , wherein at least one pressure measurement point is additionally used between the power electronics and the compressor stage.
15. 15 . The use of claim 13 , wherein at least one temperature sensor is used with the temperature measurement point and/or at least one pressure sensor is used with the pressure measurement point in and/or on the compressor.
16. 16 . The use of claim 15 , wherein the temperature sensor and/or the pressure sensor is/are electrically connected to the power electronics.
17. 17 . A method for controlling a temperature of a refrigerant circuit, comprising the steps of: providing a compressor of a refrigerant circuit; providing power electronics of the compressor; providing a compressor stage located downstream of the power electronics in the flow direction of a refrigerant, such that the refrigerant flowing into the compressor flows around the power electronics and the power electronics are cooled by the refrigerant; and providing a measurement point located between the power electronics and the compressor stage; measuring a temperature of the refrigerant in the compressor at the measurement point such that the temperature is controlled.
18. 18 . A compressor for a refrigerant circuit, comprising: power electronics; a compressor stage arranged downstream from the power electronics in the direction of flow of a refrigerant; at least one temperature measurement point is located between the power electronics and the compressor stage.
19. 19 . The compressor of claim 18 , further comprising at least one pressure measurement point between the power electronics and the compressor stage.
20. 20 . The compressor of claim 19 , further comprising: at least one temperature sensor is provided with the temperature measurement point in and/or on the compressor; and/or at least one pressure sensor is provided with the pressure measurement point in and/or on the compressor.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to PCT Application PCT/EP2023/078430, filed Oct. 12, 2023, which claims priority to German Patent Application No. DE 10 2022 210 862.0, filed Oct. 14, 2022. The disclosures of the above applications are incorporated herein by reference. FIELD OF THE INVENTION The present invention relates to a use of a temperature measurement point in a compressor to control a temperature of a refrigerant circuit, to a method for controlling a temperature of a refrigerant circuit, to a compressor and to a vehicle. SUMMARY OF THE INVENTION It is an object of the present invention to improve the temperature control of a refrigerant circuit. This object is achieved by a use of a temperature measurement point in a compressor. A method for controlling a temperature of a refrigerant circuit is furthermore proposed. Additionally, a compressor and a vehicle are proposed. A use of at least one temperature measurement point in a compressor to control a temperature of a refrigerant circuit is proposed, wherein the temperature measurement point is used between power electronics of the compressor, around which power electronics a refrigerant flowing into the compressor flows and which power electronics are cooled by the refrigerant, and a compressor stage, which is downstream of the power electronics in the flow direction of the refrigerant. The temperature measurement point is therefore located or provided downstream of the power electronics and upstream of the compressor stage. A temperature measurement point is a point on the compressor at which a temperature is measured or recorded using a measuring element of a temperature sensor or transducer. The temperature sensor or transducer may be provided at least for the most part outside or inside the compressor or compressor housing. The temperature sensor or transducer may be located in and/or on the compressor housing. The proposed location of the temperature measurement point enables the temperature of the refrigerant to be measured accurately before it enters the compressor stage. This enables precise temperature control of the refrigerant circuit to a so-called superheating temperature in the vapor region of the refrigerant. This in turn requires the best possible efficiency of the refrigerant circuit. In one embodiment, at least one pressure measurement point is used between the power electronics and the compressor stage. This allows the pressure of the refrigerant to be accurately measured before it enters the compressor stage. In this case, a pressure drop that occurs due to the flow around the power electronics is detected. Thus, using the recorded temperature and pressure information, an actual operating point of the refrigerant may be precisely determined in a so-called pressure-enthalpy state diagram or p-h diagram of the refrigerant. This requires an improvement in the temperature control or the efficiency. A pressure measurement point is a point on the compressor at which a pressure is measured or recorded using a measuring element of a pressure sensor or transducer. The pressure sensor or transducer may be provided at least for the most part outside or inside the compressor or compressor housing. The pressure sensor or transducer is located or installed in and/or on the compressor housing. In a further embodiment, at least one temperature sensor is used with the temperature measurement point and/or at least one pressure sensor is used with the pressure measurement point in and/or on the compressor. The temperature sensor and/or the pressure sensor is electrically connected to the power electronics. A method for controlling a temperature of a refrigerant circuit is furthermore proposed, in which a temperature to be controlled is measured in a compressor of the refrigerant circuit at a measurement point between power electronics of the compressor, around which power electronics a refrigerant flowing into the compressor flows and which power electronics are cooled by the refrigerant, and a compressor stage, which is downstream of the power electronics in the flow direction of the refrigerant. The temperature measurement point is therefore located or provided downstream of the power electronics and upstream of the compressor stage. The proposed location of the temperature measurement point enables the temperature of the refrigerant to be measured accurately before it enters the compressor stage. This enables precise temperature control of the refrigerant circuit to a so-called superheating temperature in the vapor region of the refrigerant. This in turn requires the best possible efficiency of the refrigerant circuit. Furthermore, a compressor for a refrigerant circuit is proposed in which at least one temperature measurement point is provided between power electronics of the compressor and a compressor stage that is arranged downstream of the power electronics in the direction of flow of a refrigerant. T