The invention discloses a microchannel
propane direct expansion type
solar heat pump
water heater and belongs to the fields of
solar heat pumps and energy
heat supply. The microchannel
propane directexpansion type
solar heat pump
water heater comprises a heat collector, a condenser, a heat storage water tank, an
electronic expansion valve, a compressor and related connection pipes. The heat collector comprises a first manifold and multiple microchannel pipes. Every two adjacent microchannel pipes are connected through the first manifold. Each microchannel
pipe is sleeved with a vacuum
glass tube. Each microchannel
pipe is a circular-arc-shaped flat
pipe, wherein the circular-arc concave face faces
sunlight. The inner surface side, right facing the convex face of the corresponding microchannel pipe, of each vacuum
glass tube is coated with a reflective
coating. Each reflective
coating is used for collecting the unused
sunlight leaking from gaps in the two sides of the corresponding microchannel pipe through the reflective
coating in the corresponding vacuum
glass tube and reflecting the
sunlight to the convex face side of the corresponding microchannel pipe for secondary use. According to the microchannel
propane direct expansion type solar
heat pump water heater, the energy utilization can be optimally controlled by all the components, the
energy loss is reduced in an all-around manner, and the microchannel propane direct expansion type solar
heat pump water heater has the beneficial effects of being high in equipment
utilization rate, remarkable in energy-saving and environmental-friendly effects and the like.