An energy-saving multifunctional cold and heat generator with cooling and heating functions. When the cooling function is performed, the refrigerant discharged from the compressor passes through the four-way valve and the first heat exchanger through the refrigerant circuit in order to obtain hot air energy, The first filter, the refrigerant expander can reduce the pressure, the second filter can convert the water in the water circuit into ice water, which can cool the object, and finally the refrigerant returns to the compressor through the four-way valve. When the heating function is executed, the refrigerant discharged by the compressor passes through the four-way valve and the second heat exchanger through the refrigerant circuit in order, and can convert the water in the water circuit into hot water, which can heat up the object, and then Through the refrigerant circuit, it passes through the second filter, refrigerant expander and can reduce pressure, the first filter, the first heat exchanger can obtain cold air energy, and finally the refrigerant returns to the compressor through the four-way valve. Using the principle of thermodynamic heat pump, energy efficiency can be increased by 3 to 8 times, and then through temperature control and compressor variable speed control, the effect of constant temperature, comfort and energy saving can be achieved. And the machine can be arbitrarily miniaturized or large-scaled, applied to more occasions,一種節能多功能冷熱生成機，具有製冷功能及製熱功能，當執行製冷功能運轉時，由壓縮機吐出之冷媒經由冷媒迴路依序通過四路閥、第一換熱器並可取得熱風能量、第一過濾器、冷媒膨脹器並可降壓、第二過濾器並可將水迴路之水轉換為冰水，該冰水可使物件降溫，最後冷媒通過四路閥回到壓縮機。當執行製熱功能運轉時，由壓縮機吐出之冷媒經由冷媒迴路依序通過四路閥、第二換熱器並可將水迴路之水轉換為熱水，該熱水可使物件升溫，再經由冷媒迴路通過第二過濾器、冷媒膨脹器並可降壓、第一過濾器、第一換熱器並可取得冷風能量，最後冷媒通過四路閥回到壓縮機。運用熱力學熱泵原理，可使能源效率提高3至8倍，再透過溫控及壓縮機可變轉速之控制，可達到定溫、舒適、節能之功效。且機器得以任意小型化或大型化，應用於更多場合，
