Abstract:
A valve (1) comprising a first housing part (2) and a second housing part (3), the first housing part (2) and the second housing part (3) being made from a sheet metal material, and being joined by means of welding, preferably laser welding, to form a closed housing of the valve (1). An actuator (9) is arranged inside the housing for driving movements of a first valve member (7) and/or a second valve member (8), said actuator (9) being arranged directly in a flow of fluid flowing in the fluid flow path during operation of the valve (1). The valve (1) is hermetically sealed due to the welding of the housing parts (2, 3).
Abstract:
A valve (1) comprising a first housing part (2) and a second housing part (3), the first housing part (2) and the second housing part (3) being made from a sheet metal material, and being joined by means of welding, preferably laser welding, to form a closed housing of the valve (1). An actuator (9) is arranged inside the housing for driving movements of a first valve member (7) and/or a second valve member (8), said actuator (9) being arranged directly in a flow of fluid flowing in the fluid flow path during operation of the valve (1). The valve (1) is hermetically sealed due to the welding of the housing parts (2, 3).
Abstract:
An expansion valve (1) for a vapour compression system, the valve (1) comprising a first valve part (5) having an outlet orifice (7) and a piston (8) movable inside the outlet orifice (7) in response to a differential pressure across the expansion valve (1), controlling a fluid flow through the valve (1). The piston (8) comprises a stop element (9) at an outlet end (8b) of the piston (8) and mechanical forcing means (10) to force the piston (8) towards a position in which the stop element (9) is brought into abutment with a valve seat (12) of the first valve part (5). A differential pressure below a predefined threshold value causes the stop element (9) of the piston (8) to abut the valve seat (12) of the first valve part (5), preventing fluid flow through the first valve part (5), via the forward fluid passage.
Abstract:
An expansion valve (1) is disclosed which comprises an inlet opening (2), at least one outlet opening (3) and first and second valve parts. The inlet opening (2) is adapted to receive fluid medium in a liquid state. The outlet opening(s) (3) is/are adapted to deliver fluid medium in an at least partly gaseous state to a flow path. The valve parts are arranged movable relative to each other in such a manner that the mutual position of the first valve part and the second valve part determines a fluid flow between the inlet opening (2) and the outlet opening(s) (3). During normal operation, a resulting force acts upon the first valve part and/or the second valve part to press the first and second valve parts towards each other. The expansion valve (1) comprises means for reducing the resulting force acting upon the valve part(s). Thereby the valve parts can easier be moved relative to each other, and the force required in order to operate the valve (1) is thereby reduced.
Abstract:
The present invention relates to a sealing system (1; 100) for an annular seal mount (40). It comprises an annular seal member (10) with two sealing lip portions (12, 14) connected by a connecting portion (11) and a spring-elastic spreader (17) secured within an annular groove of the seal member (10) and forms a channel (18) opening towards a first side in an axial direction (L). For providing bi-directional sealing in an inexpensive but reliable manner within small installation space, the sealing system (1; 100) has an expanding ring (20; 120) for abutting on the seal mount (40) at the first side. An engagement portion (23, 24; 122) of the expanding ring (20; 120) protrudes in the axial direction (L) towards a second side and is received within the channel (18). When the seal member (10) is pressed along the axial direction (L) against the expanding ring (23, 24; 122), the latter directly abuts the spreader (17) at a first radial position (R1; R1') and a second radial position (R2; R2'), thereby inducing spreading force for forcing the end sections of the sealing lip portions (12, 14) apart from each other via the spreader (17). The present invention further relates to a fluid valve (50) with a sealing system (1; 100) and to a sealing method.
Abstract:
A linear actuator (1) comprising a first part (3) and a second part (5) is disclosed. The first part (3) is arranged to rotate along with a rotating part (4) of a motor (2), and the second part (5) is arranged to drive an actuated part (18, 22). A coupling (6) interconnects the first part (3) and the second part (5) to allow the second part (5) to rotate along with the first part (3) at the same angular velocity as the first part (3). The coupling (6) defines a fit tolerance between the first part (3) and the second part (5) allowing the first part (3) to rotate a predefined distance before engaging the second part (5) and rotating the second part (5) along with the first part (3). The fit tolerance ensures that the first part (3) reaches a certain angular velocity and thereby that the resulting torque transfer from the first part (3) to the second part (5) is sufficient, e.g. to release the actuated part (18, 22) from a pre-tensioned state.
Abstract:
An expansion valve (1) comprising an inlet opening and at least two outlet openings (5) is disclosed. The inlet opening is adapted to receive fluid medium in a liquid state, and the outlet openings (5) are adapted to deliver fluid medium in an at least partly gaseous state. The expansion valve (1) further comprises a diaphragm (6), and at least two valve seats (4), each valve seat (4) being fluidly connected to one of the outlet openings (5). Each of the valve seats (4) forms a valve in combination with the diaphragm (6), the position of the diaphragm (6) thereby simultaneously defining an opening degree of each of the valves. A well defined distribution of fluid flow towards each of the outlet openings (5) is easily defined by movements of the diaphragm (6). The distribution takes place before or during expansion of the fluid medium. The expansion valve (1) may be arranged in an refrigerant path of a refrigeration system.