Air passage unit, air passage system, pool body, and massaging pool

A pool body for a massaging pool, comprising:

• an air cavity,
• a pool cavity, and
• two second air connecting openings, and
• a second fastening structure, wherein:
• the air cavity is defined within the pool body,
• a first one of the two second air connecting openings is configured to be in communication with the air cavity,
• the pool body surrounds to define the pool cavity,
• a second one of the two second air connecting openings is configured to be in communication with the pool cavity and cooperates with the pool cavity to generate the massage bubbles,
• the two second air connecting openings are disposed on the second fastening structure, and
• the two second air connecting openings are synchronously respectively connected to or detached from an air passage system through the second fastening structure being connected to or detached from the air passage system.

An air passage system for a massaging pool, comprising:

• an air pump, and
• an air passage unit, wherein:
• the air passage unit comprises an air passing portion, a first air connecting portion, and a control mechanism,
• the air passing portion comprises a first air passing passage and a second air passing passage,
• the air pump is connected to the first air passing passage and the second air passing passage,
• the control mechanism cooperates with the first air passing passage, the second air passing passage, and the first air connecting portion, so that the air passage unit is configured to be alternatively in an inflated state or an exhausted state which is configured to be selected through the control mechanism,
• when the air passage unit is in the inflated state:
• the first passing passage is in communication with external air, and
• the second air passing passage is in communication with the first air connecting portion, and
• when the air passage unit is in the exhausted state:
• the first air connecting portion is in communication with the first air passing passage through the control mechanism, and
• the second air passing passage is in communication with the external air through the control mechanism.

A massaging pool, comprising:

• a pool body, and
• an air passage system, wherein:
• an air cavity is defined within the pool body,
• the pool body comprises a second air connecting openings,
• the air passage system comprises an air pump, and an air passage unit,
• the air passage unit comprises an air passing portion, a first air connecting portion, and a control mechanism,
• the air passing portion comprises a first air passing passage and a second air passing passage,
• the air pump is connected to the first air passing passage and the second air passing passage,
• the control mechanism cooperates with the first air passing passage, the second air passing passage, and the first air connecting portion, so that the air passage unit is configured to be alternatively in an inflated state or an exhausted state which is configured to be selected through the control mechanism,
• the first air connecting portion comprises a first air connecting opening,
• the first air connecting opening is configured to be connected to the second air connecting opening,
• when the air passage unit is in the inflated state:
• the first passing passage is in communication with external air, and
• the second air passing passage is in communication with the first air connecting portion, and
• when the air passage unit is in the exhausted state:
• the first air connecting portion is in communication with the first air passing passage through the control mechanism, and
• the second air passing passage is in communication with the external air through the control mechanism.