Patent ID: 9702606
Date: 2017-07-11
CPC Classifications: F25B

Claim:
1. A pressure operation control module of a coolant recovery device, comprising: a gas path flow division module, which has a high-pressure connection terminal, a low-pressure connection terminal, and two pairs of output port and input port, the high-pressure connection terminal being connected to the output ports, the low-pressure connection terminal being connected to the input ports in order to provide a function of gas path flow division for collecting coolant from a recovery machine through the coolant recovery device to a storage tank, the coolant high-pressure connection terminal and the coolant low-pressure connection terminal being respectively provided with a high-pressure electromagnetic valve, a low-pressure electromagnetic valve, a high-pressure sensor, and a low-pressure sensor for providing coolant connection control and pressure detection of the high-pressure connection terminal and the low-pressure connection terminal for coolant recovery, the two output ports of the gas path flow division module being respectively connected to input terminals of two heat exchangers arranged in the coolant recovery device; two pressure-variable cylinders each comprising an input terminal and an output terminal, the output terminals being respectively connected to the two input ports of the gas path flow division module, the input terminals of the pressure-variable cylinders being respectively connected to output terminals of the two heat exchangers to which the gas path flow division module is connected in order to receive coolant from the heat exchangers, the pressure-variable cylinders each comprising a piston/connection rod assembly, the piston/connection rod assembly having an end received in an internal cylinder surface of the pressure-variable cylinder so that a reciprocal movement of the piston/connection rod assembly varies coolant pressure inside the pressure-variable cylinder, which is then supplied through the output terminal of the pressure-variable cylinder to the input port of the gas path flow division module; a motor, which comprises a rotary shaft coupled to an end of the piston/connection rod assembly of each of the pressure-variable cylinders to drive the piston/connection rod assembly to do linear reciprocal movement in the pressure-variable cylinder; and at least one control circuit that is electrically connected to the high-pressure side electromagnetic valve, the low-pressure side electromagnetic valve, the high-pressure side pressure sensor, and the low-pressure side pressure sensor of the gas path flow division module in order to control the opening and closing of the high-pressure side electromagnetic valve, the low-pressure side electromagnetic valve that are coupled to the gas path flow division module and activation and de-activation of the motor according to the pressure values detected by the high-pressure side pressure sensor and the low-pressure side pressure sensor.