A water valve, in which a water film is formed when the water valve connected to a water tank provided at a refrigerator door is opened and then closed and thus water film sealing is established downstream of an opening/closing surface of the water valve, thereby preventing dripping of water remaining in the water valve, enabling a clean use, and a refrigerator using the water valve. A valve body structure, in which a tube for guiding a flow of water toward a portion where a water film is to be formed between a nozzle and a valve is provided at the valve and an opening for releasing a water pressure even when the flow of water excessively concentrates, and thus, the water flowing through the opening may join a mainstream of the water discharged through a water passing hole.

A flow control valve includes a housing including an inflow port and an outflow port which communicates with the inflow port, a valve body housed in the housing and formed in a cylindrical form, the valve body allowing and prohibiting a fluid to flow between the inflow port and the outflow port by moving in an axial direction, an actuator moving the valve body in the axial direction, and a partition wall arranged between the valve body and the inflow port and causing a flow path from the inflow port to the valve body to be branched towards an outer peripheral side of the valve body.

A fluid injection device includes a housing and a valve stem. The housing includes an inlet arm having an inlet orifice for receiving a feeder fluid. An outlet arm has an outlet orifice to discharge a mixed fluid. A venturi tube is between the inlet and outlet arms. The inlet arm, veturi tube and outlet arm define a nonlinear fluid pathway where the venturi tube redefines a portion of the nonlinear fluid pathway as a constricted fluid pathway. A diverter port is used to divert a portion of the feeder fluid from the inlet arm into the container and an injection port is used to receive product from the container. A valve arm is collinearly aligned with the venturi tube and the valve stem is positioned within the valve arm and adjusts the volume of the constricted fluid pathway.

Valve plugs having curved notches are described herein. An example valve plug includes a first section defining a first end, a second section defining a second end opposite the first end, and a third section located between the first and second sections, the third section including a curved notch formed inwardly from a periphery of the third section toward a longitudinal axis of the valve plug defined by the first, second and third sections.

Valve plugs having curved notches are described herein. An example valve plug includes a first section defining a first end, a second section defining a second end opposite the first end, and a third section located between the first and second sections, the third section including a curved notch formed inwardly from a periphery of the third section toward a longitudinal axis of the valve plug defined by the first, second and third sections.

Embodiments of the invention provide a relief valve body arranged between an inlet and an outlet. The relief valve body includes an expanding nozzle extending along an axis, a first ramp extending in an arcuate path from an apex to a first terminal point, and a second ramp extending in an arcuate path from the apex to a second terminal point. The first ramp and the second ramp define an expanding flow area for a fluid flow between the inlet and the outlet.

Embodiments of the invention provide a relief valve body arranged between an inlet and an outlet. The relief valve body includes an expanding nozzle extending along an axis, a first ramp extending in an arcuate path from an apex to a first terminal point, and a second ramp extending in an arcuate path from the apex to a second terminal point. The first ramp and the second ramp define an expanding flow area for a fluid flow between the inlet and the outlet.

A valve device capable of reducing pressure loss is provided. The valve device is provided with a valve main body having a valve chamber in which a valve body is arranged, inflow outlets, and communication holes communicating the valve chamber and the inflow outlets, and a rectification member arranged in the communication hole. The communication hole has a bent portion where the center line of the communication hole is bent, and the rectification member is arranged in the bent portion and has a corner portion formed by an inner circumferential surface bent or curved at an angle larger than the angle of the bent portion.

A valve device capable of reducing pressure loss is provided. The valve device is provided with a valve main body having a valve chamber in which a valve body is arranged, inflow outlets, and communication holes communicating the valve chamber and the inflow outlets, and a rectification member arranged in the communication hole. The communication hole has a bent portion where the center line of the communication hole is bent, and the rectification member is arranged in the bent portion and has a corner portion formed by an inner circumferential surface bent or curved at an angle larger than the angle of the bent portion.

In a pulse tube refrigerator, a gas flow passage is connected to a high-temperature end of a low-temperature side pulse tube and a compressor, such that a working gas flows in the gas flow passage. The gas flow passage includes: a first flow passage connected to the high-temperature end of the low-temperature side pulse tube; a second flow passage connected to the compressor and having an outlet facing an outlet of the first flow passage; and a housing that gastightly accommodates the outlet of the first flow passage and the outlet of the second flow passage. The housing has a gastight space communicating with the outlet of the first flow passage and the outlet of the second flow passage, the gastight space located on a side of the low-temperature side pulse tube with respect to the outlet of the first flow passage.