Abstract: A heat pump apparatus that can easily prevent noise generated during partial-load operation is provided. The heat pump apparatus includes a centrifugal compressor configured to compress a refrigerant; a condenser configured to condense the compressed refrigerant; an expansion valve configured to adiabatically expand the condensed refrigerant; an evaporator configured to vaporize the adiabatically-expanded refrigerant; a container into which the vaporized refrigerant flows and from which the refrigerant that flowed in flows out to the centrifugal compressor; a sound-insulating member configured to cover the container and prevent sound generated inside the container from leaking outside; a bypass channel configured to guide part of the refrigerant from an area between the centrifugal compressor and the condenser to the container; and a flow control valve configured to control the flow rate of the refrigerant flowing through the bypass channel.

Abstract: A heat pump apparatus that is capable of suppressing an increase in the installation area therefor and volume thereof is provided. A heat pump apparatus includes a compressor that compresses refrigerant, a condenser that liquefies the compressed refrigerant, and an evaporator that evaporates the liquefied refrigerant, wherein the condenser and the evaporator are plate-type heat exchangers formed in rectangular cuboid shapes, and the condenser, which is a plate-type heat exchanger, and the evaporator, which is a plate-type heat exchanger, are disposed next each other.

Abstract: An ejector that does not inhibit a flow of fluid and a refrigerating system provided with the ejector. The ejector includes a hollow passage, i.e. a negative pressure generating passage, through which fluid flows, a member having a hole disposed in the hollow passage, a negative pressure chamber disposed downstream of the member having a hole, and a hollow passage, i.e. an inlet passage, open to the negative pressure chamber. A filter, such as a mesh, is disposed in the inlet passage.

Abstract: The present invention proposes an ejector which does not inhibit a flow of fluid and a refrigerating system provided with the ejector.