Anti-freeze high-efficiency flat solar water heater without water tank

Abstract

The invention discloses an anti-freeze high-efficiency flat solar water heater without a water tank. The solar water heater is characterized by comprising a frame shell, a heat insulation layer, a glass cover plate, an absorber plate core, a superconducting heat pipe, a phase transformation heat storage material layer and a hot water coil pipe, two ends of the hot water coil pipe are connected with a cold water inlet pipe and a hot water outlet pipe respectively, conducting silicone rubber is arranged between the absorber plate core and the superconducting heat pipe, a heat insulating material layer is arranged between the superconducting heat pipe and the phase transformation heat storage material layer, and a condensation end of the superconducting heat pipe contacts with the phase transformation heat storage material layer. Compared with the prior art, the solar water heater has the advantages that the structure is simple and reasonable, the heat absorbing area of the superconducting heat pipe is large, the heat absorbing effect is good, heat is stored by the condensation end and phase transformation materials, and by means of heat insulation, the good heat absorbing effect is kept, and further fine heat preservation effects are achieved when the solar water heater is used.

Description

technical field [0001] The invention relates to an antifreeze type high-efficiency flat solar water heater without a water tank, which belongs to the field of solar water heaters. Background technique [0002] Existing flat-panel solar water heating consists of flat-panel heat collectors, hot water storage tanks, supports, connecting pipes, control components and the like. Among them, the cost of the hot water storage tank is relatively high, accounting for a large part of the total cost. Also there is following shortcoming in addition: the one, and water tank is complicated to install, and volume is larger and takes up space. The second is that there are many pipelines connecting the flat plate collector and the water tank, and the water tank and the user's water connection, and the heat loss of the pipeline is large. The third is that system maintenance is troublesome. Fourth, the installation of various components of the system is messy and unsightly. [0003] The app...

AI Technical Summary

Problems solved by technology

Among them, the cost of hot water storage tank is relatively high, accounting for a large part of the total cost

There are also the following disadvantages in addition: one is that the installation of the water tank is complicated, and the volume is large and takes up space

The second is that there are many pipelines connecting the flat plate collector with the water tank, and the water tank with the user's water, and the heat loss of the pipeline is large.

Third, system maintenance is troublesome

Fourth, the installation of various components of the system is messy and unsightly

The theory of this technical solution is to absorb heat through the heat absorbing plate, and conduct heat through the connection between the outer tube and the heat absorbing plate. Heat exchange is realized through the heat conduction between the inner tube and the heat storage material, so that one end of the inner tube enters cold water, while the other end outputs hot water, although theoretically it can achieve the working process of heat absorption, heat storage and heat release and realize no water tank The installed flat solar water heater still has the following deficiencies during actual use: 1. The heat-absorbing plate absorbs heat, and the heat-absorbing plate is connected to the outer pipe for heat transfer. Because the contact area between the outer pipe and the heat-absorbing plate is small, the same unit area The utilization rate of the heat energy of the heat absorbing plate or the flat solar collector is low, and the efficiency of heat conduction is also very low simultaneously. Tube heat transfer and phase change heat storage materials of the outer tube and the inner tube store heat. At the same time, the number of outer tubes in the flat plate collector per unit area is limited. On the one hand, the heat absorption capacity is poor; When the heat absorbed by the outer tube is large, the heat storage capacity per unit area is bound to be limited due to the small space of the heat storage material. Therefore, this scheme cannot provide hot water with a relatively low temperature, and the amount of hot water provided is relatively small. Small, so it brings a lot of inconvenience in the actual application process, and the value of use is not very high

In this way, the heat energy absorbed by the absorbing coating is directly transmitted to the phase change heat storage material to make it phase change heat storage. When the user uses hot water, he can directly enter the water through the water inlet end of the heat exchange pipe, and the water outlet end can be discharged to realize the phase change heat storage. The heat exchange of materials is realized. From the perspective of heat absorption, this technical solution has a better heat absorption effect in sunny days and other sunny conditions, and its heat absorption and heat exchange efficiency is relatively high. However, due to the two-way conduction of heat energy Yes, when there is only rainy weather or at night, since the temperature of the absorbing coating is the same as that of the outside, when the temperature in the heat storage phase change material is higher than that of the absorbing coating, the corresponding heat storage phase change material will conduct heat energy to the outside, Its heat preservation effect is poor, unless the heat absorbed in the day is used up by water in the night, otherwise the loss of heat is relatively large, and the actual use value is not high

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