Expandable hose and hose component

An expandable hose, comprising:

• an elastic inner hose (3) having a drainage channel therein, wherein at least one layer of elastic inner hose (3) is provided, the elastic inner hose (3) is configured to axially extend and undergo a radial and elastic geometric deformation when fluid is introduced into the drainage channel under a pressure, and is configured to axially retract and radially recover when a pressure of drainage channel is released;
• an elastic braided layer (2) tightly sleeving an outside of the elastic inner hose (3), a radial circumference of the elastic inner hose (3) being larger than a radial inner circumference of the elastic braided layer (2), the elastic inner hose (3) and the elastic braided layer (2) being in an interference fit state, and the elastic braided layer (2) is configured to be driven by the elastic inner hose (3) to axially extend and retract when the elastic inner hose (3) axially extends and retracts, and is configured to restrict a radial expansion of the elastic inner hose (3) when the elastic inner hose (3) undergoes a radial and elastic geometric deformation;
• and
• an elastic outer layer (1) tightly sleeving an outside of the elastic braided layer (2) and spaced apart from the elastic inner hose (3) by the elastic braided layer (2), wherein at least one layer of elastic outer layer (1) is provided, the elastic outer layer (1) is configured to deform synchronously with the elastic braided layer (2).