JP2017078563A5 - - Google Patents

Description

In order to achieve the above object, an accumulator according to the present invention basically includes a tank provided with an inlet and an outlet, and an outflow pipe connected to the outlet and disposed in the tank. The accumulator is provided with a protrusion serving as a starting point of boiling in a portion of the accumulator that is immersed in a liquid portion composed of liquid refrigerant and oil that accumulates in the tank, and the outflow pipe is provided at the outlet. A double pipe structure comprising an inner pipe that is connected and suspended in the tank and an outer pipe that is disposed outside the inner pipe, and the protrusion includes an outer periphery of the outer pipe and an inner periphery of the tank and It is provided in at least a part of the upper surface of the bottom .

Claims (18)

An accumulator comprising a tank provided with an inflow port and an outflow port, and an outflow pipe connected to the outflow port and disposed in the tank,
In the portion of the accumulator that is immersed in a liquid portion composed of a liquid refrigerant and oil that accumulates in the tank, a protrusion serving as a starting point of boiling is provided ,
The outflow pipe has a double pipe structure composed of an inner pipe coupled to the outlet and suspended in the tank and an outer pipe disposed outside the inner pipe,
The accumulator is characterized in that the protrusion is provided on at least a part of the outer periphery of the outer pipe and the inner periphery and bottom surface of the tank . The projections, according to claim 1, characterized in that provided in the bottom given by the height above the unit, and / or the position of the lower from the upper end by a predetermined height of the outer pipe of the tank Accumulator. The protrusion is provided at least in a height region between a lower limit liquid surface height position of occurrence of abnormal noise due to bumping of the liquid portion and a maximum liquid surface height position of the liquid portion. The accumulator according to claim 1 or 2 . The accumulator according to any one of claims 1 to 3 , wherein the protrusion is provided on the outer periphery of the outer pipe in a spiral manner or along the vertical direction. The accumulator according to any one of claims 1 to 4 , wherein the protrusion is provided on the inner periphery of the tank in a spiral shape or along the vertical direction. The protrusion includes a bottom portion upper surface to the annular of the tank, spiral, or accumulator according to claim 1, any one of 5, characterized in that are projected radially. The protrusions accumulator according to any one of claims 1 6, characterized in that it is formed by pressing or cutting. The accumulator according to any one of claims 1 to 6 , wherein the protrusion is formed by knurling or screwing. The accumulator according to any one of claims 1 to 6 , wherein the protrusion is formed at the same time when the outer pipe or the tank is formed. The accumulator according to any one of claims 1 to 6 , wherein a cloth body or a foam material is wound or extrapolated around the outer periphery of the outer pipe. The cloth-like body or the foamed material is wound at least in a height region between a lower limit liquid surface height position of abnormal noise generation due to bumping of the liquid portion and a highest liquid surface height position of the liquid portion. The accumulator according to claim 10 , wherein the accumulator is extrapolated. The accumulator according to claim 10 or 11 , wherein a desiccant storage section for storing a desiccant for absorbing and removing moisture in the refrigerant is provided in the cloth-like body. The accumulator according to claim 12 , wherein the desiccant storage portion is provided in the vertical direction outside the outer pipe. The accumulator according to claim 12 or 13 , wherein the desiccant storage part is provided outside the inlet side of the outer pipe. In the cloth-like body or the foamed material, an elongated material spirals around the outer pipe so as to make a gap between the end faces, so that the end faces abut each other, or the end faces overlap each other. The accumulator according to any one of claims 10 to 14 , wherein the accumulator is wound or extrapolated in a shape. The cloth-like body or the foamed material is composed of a plurality of materials, and the plurality of materials are in contact with each other so that a gap is formed between the end surfaces, or between the end surfaces. The accumulator according to any one of claims 10 to 14 , wherein the accumulator is wound or extrapolated adjacent to the outer periphery of the outer pipe so as to overlap each other. The accumulator according to any one of claims 10 to 14 , wherein a slit is formed in the cloth-like body or the foamed material. The slit is oriented horizontally, toward the vertical direction, according to claim 17, characterized in that it is formed toward a direction inclined with respect to the vertical direction when viewed from the side, or a spiral Accumulator.