Integration of a delta-p expansion valve for COP-optimal regulation in a high-pressure connection, in particular an internal heat exchanger

Abstract

The invention relates to an expansion valve for regulating the mass flow rate by generating a pressure difference on the expansion valve of a refrigeration or heating cycle. Said expansion valve comprises a base (31) having a through-hole (32) that is surrounded by a valve seat (33), and a valve element (34) which closes the through-hole (32) and rests within the valve seat (33) in a closed position and can be moved relative to the valve seat (33) in the opening direction on the base (31). The base (31) is designed to be inserted into a bore section (29) of an attachment point (26, 27) of a connection (21) of an internal heat exchanger (14) or into a connection (21) of a pipe in the refrigeration or heating cycle. The outer circumference (46) of the base (31) has a fastening section (47) that is releasably fastened to the attachment point (26, 27) of the connection (21) by means of a complementary fastening section (48).

Description

Technical field [0001] The present invention relates to an expansion valve used for mass flow regulation (regelung) through the pressure difference at the expansion valve in a cold cycle or a heat cycle. Background technique [0002] From document US2006 / 0117793A1, an expansion valve is known, which is provided for regulating the mass flow in a cold cycle, in particular in an air conditioner for a vehicle. The expansion valve is installed between the internal heat exchanger and the evaporator in the pipe section. To this end, the expansion valve has a base body that includes a through hole that is surrounded by a valve seat and can be closed in a closed position with a valve element. The valve element can be displaced toward the low pressure side in the opening direction for adjusting the high pressure. The base body of the expansion valve is inserted on the high-pressure side into an orifice of a pipe section suitable for accommodating the expansion valve. Through a separate ...

AI Technical Summary

Problems solved by technology

[0003] This arrangement has the disadvantage that due to this additional bolted connection for fixing the expansion valve in the pipe section a further bolted connection is required, which is coupled to the internal heat exchanger

This has the disadvantage that additional sealing points are required, which reduces the tightness of the coolant circuit

Additionally, there are increased assembly costs and material costs

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