Microchannel propane direct expansion type solar heat pump water heater

Abstract

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.

Description

technical field [0001] The invention belongs to the field of solar heat pump and energy heating, and relates to a solar water heater, in particular to a microchannel propane direct expansion solar heat pump water heater. Background technique [0002] Building energy consumption such as domestic hot water, air conditioning, and heating accounts for more than one-fifth of the country's commodity energy consumption. Energy conservation and emission reduction, as an important topic that can achieve energy conservation, pollution control and improve energy utilization efficiency after finding new energy sources, has become an important means to solve environmental problems, achieve rapid economic growth and prolong the search time for new energy sources. The existing products of solar collectors in my country have problems such as low energy utilization efficiency in terms of glass transmittance, high-efficiency selective coating, overall structural design and production technolo...

AI Technical Summary

Problems solved by technology

Refrigerant propane R290 is an environmentally friendly working fluid with good heat transfer performance, small flow viscosity coefficient, low cost price, zero ozone depletion potential (ODP), and extremely small global warming potential (GWP), which has good environmental protection characteristics, but its flammable and explosive shortcomings are currently the biggest obstacle restricting its large-scale promotion

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