Vegetable preservation and growing case and pipe connection control method for vegetable preservation and growing case

A vegetable preservation and growing case, comprising:

• a thermal insulation case body, and at least one detachable vegetable carrying box for vegetable growing or preservation disposed in the thermal insulation case body, wherein the detachable vegetable carrying box is connected to the thermal insulation case body by means of a pluggable electric connection and a pluggable water connection,
• wherein the thermal insulation case body is provided with a circulation pipeline for circularly supplying a nutrient solution to the detachable vegetable carrying box, wherein the detachable vegetable carrying box is connected to the circulation pipeline by means of the pluggable water connection;
• wherein the detachable vegetable carrying box comprises a solution carrying case having a high-level liquid inlet and a low-level liquid outlet that are opposite to each other, wherein an inner wall of the solution carrying case comprises an elastic sheet corresponding to the high-level liquid inlet, wherein the elastic sheet is configured to prevent the nutrient solution in the detachable vegetable carrying box from flowing out when the detachable vegetable carrying box is pulled out;
• wherein a first water swivel for supplying the nutrient solution to the detachable vegetable carrying box and a second water swivel for discharging the nutrient solution are disposed in the thermal insulation case body, the first water swivel is pluggably connected to the high-level liquid inlet, the low-level liquid outlet is pluggably connected to the second water swivel, and the first water swivel and the second water swivel are in communication with the circulation pipeline;
• wherein a circuit component is disposed in the thermal insulation case body, the thermal insulation case body and the detachable vegetable carrying box are provided with a corresponding first electromagnetic connection portion and a corresponding second electromagnetic connection portion, respectively, the second electromagnetic connection portion is pluggably electrically connected to the first electromagnetic connection portion, and the circuit component is controlled to be on/off according to a plug/unplug state between the first electromagnetic connection portion and the second electromagnetic connection portion;
• wherein a first solenoid valve is cooperatively connected to the first water swivel;
• the first solenoid valve is in linkage with the first electromagnetic connection portion and the second electromagnetic connection portion, and is configured to control, according to a plug/unplug state between the first electromagnetic connection portion and the second electromagnetic connection portion, a nutrient solution feed branch from the circulation pipeline to the corresponding detachable vegetable carrying box to be on/off;
• and
• wherein a second solenoid valve corresponding to the low-level liquid outlet is disposed in the solution carrying case;
• the second solenoid valve is in linkage with the first electromagnetic connection portion and the second electromagnetic connection portion, and is configured to control, according to a plug/unplug state between the first electromagnetic connection portion and the second electromagnetic connection portion, a nutrient solution backflow branch from the corresponding detachable vegetable carrying box to the circulation pipeline to be on/off,
• such that when the detachable vegetable carrying box is pulled out, both the pluggable electric connection and the pluggable water connection are disconnected simultaneously.