Linear compressor

A linear compressor comprising:

• a cylinder that defines a compression space;
• a discharge valve detachably attached to an end surface of the cylinder and configured to open and close the compression space of the cylinder;
• and
• a valve spring configured to press the discharge valve toward the end surface of the cylinder,
• wherein the discharge valve comprises:
• a valve body portion having a first surface and a second surface opposite to the first surface, the first surface facing the end surface of the cylinder;
• and
• a spring coupling portion that is disposed at the second surface of the valve body portion and that connects to the valve spring,
• wherein the valve body portion includes reinforced fibers at the first surface, the reinforced fibers being oriented parallel to the end surface of the cylinder,
• wherein the valve body portion has an annular shape defining a hollow portion,
• wherein the spring coupling portion includes a coupling protrusion that is inserted into the hollow portion,
• wherein the valve body portion defines a first opening and closing surface detachable from the end surface of the cylinder,
• wherein the spring coupling portion includes a guide protrusion extending toward the cylinder,
• wherein the spring coupling portion defines a second opening and closing surface configured to open and close the compression space of the cylinder without contacting the end surface of the cylinder, and
• wherein the second opening and closing surface is configured to, based on the discharge valve opening the compression space of the cylinder, be positioned inside the cylinder,
• wherein the discharge valve comprises a composite unit having a plurality of composite sheets that are stacked in multiple layers, each of the plurality of composite sheets including reinforced fibers that are disposed in one direction in each of the multiple layers,
• wherein the plurality of composite sheets include a first composite sheet and a second composite sheet that is stacked on the first composite sheet, and
• wherein the reinforced fibers of the first composite sheet are disposed in a different direction from the reinforced fibers of the second composite sheet.

A linear compressor comprising:

• a cylinder that defines a compression space;
• a discharge valve detachably attached to an end surface of the cylinder and configured to open and close the compression space of the cylinder;
• and
• a valve spring configured to press the discharge valve toward the end surface of the cylinder,
• wherein the discharge valve comprises:
• a valve body portion having a first surface and a second surface opposite to the first surface, the first surface facing the end surface of the cylinder;
• and
• a spring coupling portion that is disposed at the second surface of the valve body portion and that connects to the valve spring,
• wherein the valve body portion includes reinforced fibers at the first surface, the reinforced fibers being oriented parallel to the end surface of the cylinder,
• wherein a coupling surface is stepped in an annular shape at an edge portion of a second opening and closing surface of the spring coupling portion, the valve body portion being inserted into the coupling surface to define a first opening and closing surface detachable from the end surface of the cylinder, and
• wherein the valve body portion is thinner than the spring coupling portion,
• wherein the discharge valve comprises a composite unit having a plurality of composite sheets that are stacked in multiple layers, each of the plurality of composite sheets including reinforced fibers that are disposed in one direction in each of the multiple layers,
• wherein the plurality of composite sheets include a first composite sheet and a second composite sheet that is stacked on the first composite sheet, and
• wherein the reinforced fibers of the first composite sheet are disposed in a different direction from the reinforced fibers of the second composite sheet.