Described herein is a fluorinated diaminoolefin of formula (I) (R.sub.f.sup.1CF.sub.2)(R.sub.f.sup.2)NCH.sub.2CH═CHCH.sub.2N(R.sub.f.sup.4)(CF.sub.2R.sub.f.sup.3) where: R.sub.f.sup.1 and R.sub.f.sup.3, are independently selected from F, a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms, or a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms comprising at least one catenated atom selected from O, N, S or combinations thereof; and R.sub.f.sup.2 and R.sub.f.sup.4 are independently selected from a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms, or a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms comprising at least one catenated atom selected from O, N, S or combinations thereof or at least one of (i) R.sub.f.sup.1CF.sub.2 and R.sub.f.sup.2 and (ii) R.sub.f.sup.3CF.sub.2 and R.sub.f.sup.4 are bonded together to form a fluorinated ring structure comprising 4-8 carbon atoms and optionally comprising at least one catenated atom selected from O, N, S or combinations thereof.

Described herein is a fluorinated diaminoolefin of formula (I) (R.sub.f.sup.1CF.sub.2)(R.sub.f.sup.2)NCH.sub.2CH═CHCH.sub.2N(R.sub.f.sup.4)(CF.sub.2R.sub.f.sup.3) where: R.sub.f.sup.1 and R.sub.f.sup.3, are independently selected from F, a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms, or a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms comprising at least one catenated atom selected from O, N, S or combinations thereof; and R.sub.f.sup.2 and R.sub.f.sup.4 are independently selected from a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms, or a linear or branched perfluorinated alkyl group comprising 1-7 carbon atoms comprising at least one catenated atom selected from O, N, S or combinations thereof or at least one of (i) R.sub.f.sup.1CF.sub.2 and R.sub.f.sup.2 and (ii) R.sub.f.sup.3CF.sub.2 and R.sub.f.sup.4 are bonded together to form a fluorinated ring structure comprising 4-8 carbon atoms and optionally comprising at least one catenated atom selected from O, N, S or combinations thereof.

An engine coolant separator may include a housing having an inlet and an outlet; and a guide member fixedly mounted inside the housing, and having a spiral channel inducing a spiral flow of an engine coolant, wherein the spiral channel communicates with the inlet of the housing.

An engine coolant separator may include a housing having an inlet and an outlet; and a guide member fixedly mounted inside the housing, and having a spiral channel inducing a spiral flow of an engine coolant, wherein the spiral channel communicates with the inlet of the housing.

A water-cooling pump structure with check valves and a water-cooling module thereof including a first pump unit, a first check valve, a second pump unit, a second check valve, a first connector assembly, a second connector assembly, a pipe body assembly and a heat dissipation unit. The first and second check valves are respectively mounted at the first and second water outlets of the first and second pump units. By means of the arrangement of a first sealing member inside the first check valve, the cooling liquid is prevented from flowing back to the first pump chamber. Therefore, the problem of the backflow of the cooling liquid can be totally solved. Moreover, the heat dissipation efficiency can be greatly enhanced.

A water-cooling pump structure with check valves and a water-cooling module thereof including a first pump unit, a first check valve, a second pump unit, a second check valve, a first connector assembly, a second connector assembly, a pipe body assembly and a heat dissipation unit. The first and second check valves are respectively mounted at the first and second water outlets of the first and second pump units. By means of the arrangement of a first sealing member inside the first check valve, the cooling liquid is prevented from flowing back to the first pump chamber. Therefore, the problem of the backflow of the cooling liquid can be totally solved. Moreover, the heat dissipation efficiency can be greatly enhanced.

A heat exchanger body that includes a circulation path through which a coolant is circulated and performs heat exchange between the coolant flowing through the circulation path and an electronic component; a circulation pump that supplies the coolant to the heat exchanger body; an accumulation determination unit that determines whether a foreign matter accumulation condition is fulfilled that is satisfied when foreign matter is expected to be accumulated in at least a part of the circulation path; and a process execution unit that in response to the foreign matter accumulation condition being satisfied, executes a foreign matter cleaning process of removing the foreign matter accumulated in the circulation path and cleaning the circulation path. In the foreign matter cleaning process, the process execution unit reduces an amount of coolant supplied from the circulation pump so that the coolant has a superheating degree in a nucleate boiling region.

A cold storage box 1 comprises a housing 2 internally having a storage space S for a cold storage object, and one or more heat exchanger tubes 3 provided in the storage space S; wherein the heat exchanger tubes 3 are each a multilayer tube comprising an outer tube with thermal conductivity having an outer surface facing the storage space S, and as inner tube provided inside the outer tube; a first brine solution that does not freeze at 0 C. is contained between the outer tube and the inner tube; and a refrigerant, or a second brine solution that does not freeze at 0 C. is contained inside the inner tube.

A cold storage box 1 comprises a housing 2 internally having a storage space S for a cold storage object, and one or more heat exchanger tubes 3 provided in the storage space S; wherein the heat exchanger tubes 3 are each a multilayer tube comprising an outer tube with thermal conductivity having an outer surface facing the storage space S, and as inner tube provided inside the outer tube; a first brine solution that does not freeze at 0 C. is contained between the outer tube and the inner tube; and a refrigerant, or a second brine solution that does not freeze at 0 C. is contained inside the inner tube.

In various embodiments, the present invention relates to heat dissipation systems including a hygroscopic working fluid integrating waste water as makeup water. The present invention also relates to methods of using the same. The present invention also relates to hygroscopic cooling systems adapted to dispose of waste water by combining the waste water with a hygroscopic working fluid, precipitating impurities and evaporating the remaining water.