Controllable filling method for vacuum filling

Abstract

The invention relates to a controllable filling method for vacuum filling, which comprises the following steps that: an inner needle head (10) of a double-layer needle head is firstly connected with the cavity of a workpiece to be filled to ensure that the inner needle head (10) is connected to the inner part of the hole of a main control room of a needle valve without applying an externally-applied control air pressure to enable the needle valve to be kept in a closing state, the inner needle head (10) of the double-layer needle head is connected with the cavity of the workpiece to be filled, and a closed cavity body is formed by the main control room (6) of the needle valve, the inner needle head (10) and the cavity of the workpiece to be filled; a vacuum-accessing pipe (1) is connected with a vacuum negative pressure, and vacuum pumping is carried out through an outer needle head (12); filling is carried out when a required vacuum degree is achieved; after a liquid material is filled in the cavity body of the workpiece to be filled, positive-pressure nitrogen gas is accessed by using the vacuum-accessing pipe (1), the nitrogen gas reaches the open hole of the filled workpiece through the outer needle head (12), and the liquid material in the inner needle head is pressed back to a liquid-material storing room (9) under the pressure of the nitrogen gas; and the controllable filling method can be used for the connection of a vacuum-filling pipeline and the open hole of a filled device.

Description

technical field [0001] The invention relates to the technical field of vacuum filling, in particular to a connection device between the microholes of the vacuum filling plane and the filling pipe used for dye-sensitized solar cells to prevent the electrolyte from being sucked into the vacuum pump, and other equipment requiring vacuum filling liquid. A device and a controllable filling method are provided for the opening of a filling device and the connection of a filling pipeline. Background technique [0002] In vacuum filling, preventing liquid material from being sucked into the vacuum pump is a very necessary operation control process, which can be widely used in vacuum filling of all liquids. At present, three-way valves are often used to control vacuum negative pressure and liquid material flow, and a single needle connection is used between the opening of the device to be filled and the filling pipeline. This method will bring the following adverse consequences: [0...

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Problems solved by technology

[0007] The object of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a vacuum filling connection device and a controllable filling method that prevent liquid material from being sucked into the vacuum pump , especially the controllable filling method of dye-sensitized solar cells to prevent the electrolyte from being pumped into the vacuum pump to solve the waste of liquid material in conventional vacuum filling, the corrosion of the vacuum pump by the liquid material pumped into the vacuum pump, and the vacuum The reduction of the temperature, the shortening of the service life, and the unrecovered liquid material pose a threat to the health of the staff. Filling problems

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