Energy-saving hot-cold double-effect steam generator

The invention discloses an energy-saving hot-cold double-effect steam generator which comprises a steam generation system, a high-temperature heating system, two parallel low-temperature refrigerating systems, a fan or a first water pump. The fan or the first water pump is connected with each low-temperature refrigerating system. The parallel low-temperature refrigerating systems, the high-temperature heating system and the steam generation system are sequentially connected in series. The energy-saving hot-cold double-effect steam generator saves energy, performs refrigeration through the low-temperature refrigerating systems, reduces temperature, recovers replaced heat energy through the high-temperature heating system, further improves temperature and transfers obtained high-temperature heat energy to water in the steam generation system, the water absorbs high temperature and is pressurized to produce steam, the problem that the replaced heat energy after refrigeration of a traditional refrigeration system