Trash and garbage collecting apparatus by using bag

A trash and garbage collecting apparatus using a bag, comprising:

• a suction port through which trash, garbage, and air are sucked;
• a separating device in which trash and garbage are separated in communication with the suction port;
• a vacuum suction device provided at an outlet side of the separating device and generating a suction force so that trash, garbage, and air are sucked through the suction port and the separating device;
• a passage portion of which a first portion and a second portion communicate respectively with the separating device and the vacuum suction device to connect the separating device and the vacuum suction device to each other;
• a collection container provided at a lower portion of the separating device;
• a collection bag provided in the collection container and accommodating trash therein;
• and
• a suction passage of which a lower end and an upper end communicate respectively with an inner upper portion of the collection container and an inner lower portion of the passage portion to suck air included in a flow space between the collection bag and the collection container,
• wherein the flow space is provided between the collection bag and the collection container, and is a space where air flows, and wherein a pressure drop occurs in air passing through the separating device, and a suction pressure (P1) is formed lower than an internal pressure (P2) by a pressure drop value (ΔP),
• the suction passage has an upper end and a lower end respectively communicating with the collection container and the passage portion, and a spatial pressure (P3) is formed equal to the suction pressure (P1),
• the spatial pressure (P3) is formed lower than the internal pressure (P2) by the pressure drop value (ΔP), and
• the collection bag has a shape inflated toward an inner circumferential surface of the collection container by air having the internal pressure (P2),
• wherein the suction pressure (P1) is pressure of air included in the passage portion,
• the internal pressure (P2) is pressure of air in the collection bag, and
• the spatial pressure (P3) is pressure of air in the flow space between the collection bag and the collection container.