Electromotive expansion valve and refrigeration circuit

A refrigeration circuit for conducting a two-phase refrigerant, comprising:

• an evaporator for evaporating the refrigerant,
• a condenser for condensing the refrigerant,
• a compressor for driving and compressing the refrigerant,
• an expansion valve for expanding a two-phase refrigerant, the expansion valve including:
• a hydraulic flange for integrating the expansion valve into the refrigeration circuit, the hydraulic flange comprises a refrigerant path for conducting the refrigerant and a flow opening that is configured in the refrigerant path and through which the refrigerant can flow,
• a housing secured to the hydraulic flange,
• a valve body unit for controlling the flow opening configured in the hydraulic flange,
• an electric motor for axially adjusting the valve body unit,
• the valve body unit comprises a needle body and a stopper body, the stopper body serves to control the flow opening and is arranged in an axially adjustable manner on the needle body and comprises a stopper opening,
• the needle body comprises a needle tip aligned coaxially to the stopper opening for controlling a cross-section of the stopper opening through which the refrigerant can flow,
• the hydraulic flange comprises a valve opening that leads to the flow opening and is covered by the housing,
• wherein the valve body unit projects axially with the needle body and with the stopper body into the valve opening, and
• a catching pressure spring arranged in the valve opening, being axially supported on the stopper body and directly or indirectly on the housing, and pretensions the stopper body away from the housing,
• wherein the hydraulic flange is integrated into the refrigeration circuit between the compressor and the evaporator.