Underneath large-capacity single-gas-pump foam generating device

An underneath large-capacity single-gas-pump foam generating device, comprising:

• a liquid replenishment mechanism comprising a liquid replenishment groove and a liquid replenishment bottle, wherein the liquid replenishment groove is provided with a sleeve port with an upward opening, a lower end of the liquid replenishment bottle is sleeved in the liquid replenishment groove from the sleeve port, the liquid replenishment groove is communicated with outside, and the lower end of the liquid replenishment bottle is provided with a bottle opening;
• and
• a foam generating mechanism comprising a gas supply pump unit, a gas mixing groove cavity, a gas-liquid mixing structure arranged at an upper portion of the gas mixing groove cavity, a gas inlet and a vent valve structure, wherein a lower portion of the gas mixing groove cavity is communicated with a lower portion of the liquid replenishment groove, a liquid replenishment one-way valve is arranged between the gas mixing groove cavity and the liquid replenishment groove, the liquid replenishment one-way valve has a flowing direction from the liquid replenishment groove to the gas mixing groove cavity, the gas supply pump unit is connected with the gas inlet, the vent valve structure communicates the gas mixing groove cavity with the outside, the gas-liquid mixing structure is provided with a liquid outlet channel, a gas outlet channel and a mixing channel, an inlet end of the liquid outlet channel extends downwardly into a bottom portion of the gas mixing groove cavity, an inlet end of the gas outlet channel and the gas inlet are both communicated with the upper portion of the gas mixing groove cavity, and an outlet end of the liquid outlet channel and an outlet end of the gas outlet channel are respectively communicated with an inlet of the mixing channel,
• wherein the bottle opening is provided with a liquid replenishment valve structure, and the liquid replenishment groove is provided with a liquid replenishment pushing structure for abutting against the liquid replenishment valve structure to open the liquid replenishment valve structure.