Abstract: A refrigeration system with pressure balancing function includes a condensing unit, a first refrigerant delivery pipeline, and a pressure balance control device including a temperature control unit, a first refrigerant control valve and a refrigerant supply switching controller. The temperature control unit determines if the temperature of the evaporator is abnormal, generates a temperature adjustment trigger signal that shifts between adjustment level and non-adjustment level. The refrigerant supply switching controller will determine, based on the level of the temperature adjustment trigger signal, whether to output the valve-open signal to the first refrigerant control valve.

Abstract: A refrigeration oil replacement device of a totally hermetic compressor in a refrigeration recycling system is disclosed. The totally hermetic compressor forms a hermetic chamber with a high-pressure end and a low-pressure end, and includes an input pipeline connected from the low-pressure end to the hermetic chamber, and an output pipeline connected from the high-pressure end to the hermetic chamber. The refrigeration oil replacement device has a gas charging pipeline connected to the hermetic chamber for filling in gas, and a drainage pipeline connected to the hermetic chamber. When gas is pumped in from the gas charging pipeline, the deteriorated refrigeration oil inside the hermetic chamber will be discharged from the drainage pipeline under the pressure.

Abstract: A refrigerant piping device includes a refrigerating head, an input unit connected to the refrigerating head to input refrigerant, and an output unit connected to the refrigerating head to output refrigerant. The output unit includes a refrigerant return pipe connected to the refrigerating head, and a heating module configured on the refrigerant return pipe to heat up the refrigerant inside the refrigerant return pipe. The refrigerant return pipe is configured with a heating module to heat up the refrigerant inside the pipe, and the heating can remove the frozen state of the refrigerant return pipe to recover the original flexibility and function of the refrigerant return pipe, thus avoiding the problem wherein the refrigerant return pipe is frozen and gets brittle under the low temperature, and breakage due to the high-speed reciprocating motion of the refrigerating head left and right, back and forth, or up and down.

Abstract: A cooling head for a temperature-controlled phase change cooler has a main body, an evaporating chamber within the main body, at least two cap tubes and at least a heat source mounted onto the periphery of the evaporating chamber. With one of the cap tubes, the coolant is guided into the evaporating chamber, then the cooling head of the phase change cooler could be quickly cooled down due to rapid heat absorption characteristic of the evaporated coolant. In such a case, a heat source is used for heating by a control mechanism, and the temperature could be adjusted to a desired temperature point within the limited range of low temperature according to the user demands. When the preset temperature point is higher than normal temperature, the control mechanism could change properly the flux via one of two cap tubes, and provide proper amount of coolant for evaporative cooling.

Abstract: A multi-channel refrigerant controller with changeable refrigerant evaporation implements a refrigerant-channel assembly to control refrigerant in terms of flow and direction, and, when working with a phase-change cooler, well supports both high- and low-temperature operations. The multi-channel refrigerant controller includes a refrigerant-channel assembly, a solenoid-valve assembly, a capillary-tube assembly and an execution controller. When receiving settings for a high- or low-temperature operation, the execution controller correspondingly opens relevant refrigerant channels in the refrigerant-channel assembly to guide the refrigerant influents through capillary tubes of different flow capacities to different sites on the phase-change cooler for evaporation cooling. In a high-temperature operation, the controller effectively cools down the otherwise hot, gaseous return refrigerant, so as to not only protect the cooling system's components and operators, but also improve cooling efficiency and capability.

Abstract: A cooling head for a temperature-controlled phase change cooler has a main body, an evaporating chamber within the main body, at least two cap tubes and at least a heat source mounted onto the periphery of the evaporating chamber. With one of the cap tubes, the coolant is guided into the evaporating chamber, then the cooling head of the phase change cooler could be quickly cooled clown due to rapid heat absorption characteristic of the evaporated coolant. In such a case, a heat source is used for heating by a control mechanism, and the temperature could be adjusted to a desired temperature point within the limited range of low temperature according to the user demands. When the preset temperature point is higher than normal temperature, the control mechanism could change properly the flux via one of two cap tubes, and provide proper amount of coolant for evaporative cooling.