Liquid loading device and liquid loading method

1. A liquid loading device for loading liquid into a product, the product comprising a liquid inlet, an air outlet, and a cavity, the liquid inlet and the air outlet communicating with the cavity, the liquid loading device comprises:

a loading module configured to load liquid into the cavity through the liquid inlet;

a pressure sensor configured to sense a pressure in the cavity and generate at least one pressure value;

an air extraction module configured to extract air in the cavity through the air outlet; and

a controller coupled to the loading module and the air extraction module, the controller configured to control the air extraction module to operate based on related data, and the related data comprising at least one of a duration, the at least one pressure value, and a loading amount of liquid loaded into the cavity,

wherein the at least one pressure value comprises a first negative pressure value, the controller is further configured to control the loading module to stop loading the liquid into the cavity when the first negative pressure value matches a first preset pressure value;

wherein the control module is further configured to control the air extraction module to start extracting air before or when the liquid is started loading into the cavity, and to stop extracting air before the liquid is stopped loading into the cavity.

2. The liquid loading device of claim 1 , wherein the duration comprises at least one of an extracting duration of extracting air or a loading duration of loading liquid into the cavity, the controller is configured to control the air extraction module to stop extracting air when the extracting duration reaches a preset extracting duration.

3. The liquid loading device of claim 1 , wherein the at least one pressure value further comprises a sixth negative pressure value, the controller is configured to control the air extraction module to stop extracting air when the pressure value reaches the sixth negative pressure value.

4. The liquid loading device of claim 1 , wherein the duration further comprises a loading duration for loading the liquid into the cavity, and the controller is further configured to control the loading module to stop loading the liquid based on the loading duration, the loading amount, or the at least one pressure value.

5. The liquid loading device of claim 1 , further comprising a flow sensor configured to sense the loading amount, wherein the duration comprises a loading duration of loading the liquid into the cavity, the controller is configured to control the air extraction module to stop extracting air based on the loading amount or the loading duration.

6. The liquid loading device of claim 1 , wherein the controller is further configured to control the loading module to load the liquid into the cavity through the liquid inlet, and control the air extraction module to simultaneously extract air from the cavity through the air outlet during a portion of a loading duration.

7. A liquid loading method for loading liquid into a product by a liquid loading device, the liquid loading device comprising a loading module, an air extraction module, and a controller coupled to the loading module and the air extraction module, the product comprising a cavity, a liquid inlet and an air outlet communicating with the cavity, the liquid loading method comprising:

extracting, by the air extraction module, air from the cavity through the air outlet;

loading, by the loading module, liquid into the cavity through the liquid inlet;

sensing, by a pressure sensor, a pressure in the cavity to get at least one pressure value, wherein the at least one pressure value comprises a first negative pressure value;

controlling, by the controller, the loading module to stop loading the liquid into the cavity when the first negative pressure value matches a first preset pressure value;

controlling, by the controller, the air extraction module to operate based on related data, the related data comprising at least one of a duration, the at least one pressure value, and a loading amount of liquid loaded into the cavity, wherein the air extraction module starts extracting air before or when the liquid is started loading into the cavity, and stops extracting air before the liquid is stopped loading into the cavity.

8. The liquid loading method of claim 7 , wherein the duration comprises a loading duration for loading the liquid into the cavity, and the liquid loading method further comprises:

controlling, by the controller, the loading module to operate based on the related data, and the related data comprise at least one of the loading duration, the at least one pressure, and the loading amount.

9. The liquid loading method of claim 7 , wherein the duration comprises an extracting duration, and controlling, by the controller, the air extraction module to operate based on related data comprises:

controlling, by the controller, the air extraction module to stop extracting air when the extracting duration reaches a preset extracting duration.

10. The liquid loading method of claim 9 , further comprising sensing the pressure in the cavity to get at least one pressure value, the at least one pressure value comprises a seventh negative pressure value, and the liquid loading method further comprises:

controlling, by the controller, the loading module to start to load or stop loading the liquid when the pressure value reaches the seventh negative pressure value.

11. The liquid loading method of claim 7 , wherein the at least one pressure value further comprises a sixth negative pressure value, and controlling, by the controller, the air extraction module to operate based on related data comprises:

controlling, by the controller, the air extraction module to stop extracting air when the pressure value reaches the sixth negative pressure value.

12. The liquid loading method of claim 11 , wherein the at least one pressure value further comprises a third negative pressure value, and the liquid loading method further comprises:

controlling, by the controller, the loading module to start to load the liquid when the pressure value reaches the third negative pressure value.

13. The liquid loading method of claim 12 , wherein the at least one pressure value further comprises a fifth negative pressure value, the fifth negative pressure value is less than the third negative pressure value, and the liquid loading method further comprises:

analyzing, by the controller, a change rate from the third negative pressure value to the fifth negative pressure value; and

controlling, by the controller, the loading module to control a loading speed of the liquid into the cavity based on the change rate.

14. The liquid loading method of claim 7 , wherein the duration further comprises a loading duration of loading liquid to the cavity, and the liquid loading method further comprises:

controlling, by the controller, the loading module to stop loading the liquid based on the loading duration or the loading amount.