Central air conditioning and heat pump system with energy efficient arrangement

An air conditioning and heat pump system, comprising:

• a plurality of connecting pipes;
• a main heat exchange system, which comprises:
• a main casing;
• a compressor supported in said main casing, said compressor having a compressor outlet and a compressor inlet;
• a first main heat exchanger supported in said main casing and connected to said compressor through at least one of said connecting pipes;
• and
• a second main heat exchanger supported in said main casing and connected to said compressor and said first heat exchanger through at least one of said connecting pipes;
• a heat distribution system, which comprises:
• a first pumping device connected to said first main heat exchanger of said main heat exchange system through at least one of said connecting pipes;
• and
• at least one terminal device connected to said first pumping device and said first main heat exchanger through at least one of said connecting pipes, and comprises:
• a ventilating device, which comprises:
• a supporting frame having an air intake opening exposed to ambient air for allowing intake of air through said air intake opening;
• a ventilating heat exchanging unit supported in said supporting frame and connected to said first pumping device and said first main heat exchanger for pre-heating said ambient air drawn from said air intake opening;
• and
• a centrifugal fan unit supported in said supporting frame for drawing ambient air through said air intake opening, and delivering air to a predetermined indoor space;
• and
• an energy efficient arrangement, which comprises:
• a first energy saver heat exchanger connected to said first main heat exchanger and said second main heat exchanger through at least one of said connecting pipes;
• a second pumping device connected to said first energy saver heat exchanger through at least one of said connecting pipes;
• and
• a pre-heating heat exchanger supported in said supporting frame at a positioned between said ventilating heat exchanging unit and said air intake opening, said pre-heating heat exchanger being connected to said second pumping device and said first energy saver heat exchanger,
• said air conditioning and heat pump system being selectively operated between an air conditioning mode and a heat pump mode, wherein in said air conditioning mode, a predetermined amount of vaporous refrigerant is arranged to leave said compressor and guided to enter said second main heat exchanger for releasing heat thereto, said refrigerant leaving said second main heat exchanger being guided to flow into said first main heat exchanger for absorbing heat, said refrigerant leaving said first main heat exchanger being guided to flow back to said compressor to complete an air conditioning cycle, a predetermined amount of water circulating through said ventilating device and said first main heat exchanger for releasing heat to said refrigerant, said water leaving said first energy saver heat exchanger being guided to flow into said ventilating heat exchanging unit for heating said ambient air flowing through said air intake opening;
• wherein in said heat pump mode, a predetermined amount of vaporous refrigerant is arranged to leave said compressor and guided to flow into said first main heat exchanger for releasing heat to a predetermined amount of water circulating through said first main heat exchanger, said refrigerant leaving said first main heat exchanger being guided to flow into said first energy saver heat exchanger for releasing heat to said water circulating through said first energy saver heat exchanger, said refrigerant leaving said first energy saver heat exchanger being guided to flow into said second main heat exchanger for absorbing heat, said refrigerant leaving said second main exchanger being guided to flow to back said compressor to complete a heat pump cycle, said water circulating through said first energy saver heat exchanger for absorbing heat from said refrigerant, said water leaving said first energy saver heat exchanger being guided to flow into said pre-heating heat exchanger for releasing heat to said ambient air flowing through said air intake opening.