Solar and oil-gas synchronous or alternating and afterheat-applying water heating system and method thereof

Abstract

The invention relates to a solar and oil-gas synchronous or alternating and afterheat-applying water heating system and a method thereof. The system comprises a solar heat absorption device, a fuel oil or gas combustor, a combustion chamber, a water heat exchange device, a water storage vessel, a water heat-collecting circulation channel, a gas heat-collecting circulation channel and a switch forcontrolling the water heat-collecting circulation channel and the gas heat-collecting circulation channel to be connected into the solar heat absorption device. For most of the time, the water heat-collecting circulation channel is selected to work, thereby water can be directly heated, and the loss of heat energy is avoided; in frosty seasons, the gas heat-collecting circulation channel is switched by the switch to work, and air is taken as a working medium, thereby avoiding the influence that pipelines are damaged by frost and icing in a water working medium, ensuring normal work of the whole system, and avoiding the resting period. The invention has the advantages of fully utilizing solar energy, having high efficiency and not being influenced by the frosting period.

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a hot water system and method for solar energy, oil and gas synchronization or alternation, and waste heat application, which can utilize both solar thermal energy and a burner as a heat source. Background technique [0002] Existing heat exchange devices are generally divided into domestic heat exchange devices, such as showers, or heat exchange devices for bathrooms, such as steam boilers used in factories or bathrooms, in terms of use occasions. In terms of the heat energy used, it is generally divided into solar water heating devices or oil, gas or coal-fired water heating devices. The current solar water heating device generally comprises a solar vacuum heat-absorbing tube and a water storage tank connected thereto. After the solar energy heats the water in the vacuum heat-absorbing tube, it is stored in the water storage tank for subsequent use. This solar heat exchange device, due...

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Problems solved by technology

[0005] However, the water heat exchange devices and systems of the above two structures also have the following disadvantages: 1. Solar energy cannot directly heat water, and hot air flow needs to be used for heat exchange, and the heat exchange efficiency is low. , in the frost period, it is easy to cause the bursting of the pipeline, etc., and it cannot be used, which makes the system enter a dormant period and affects the use of the system; The heat energy of the waste hot water is also discharged, and the heat energy is wasted, which is not environmentally friendly and a waste of resources; 3. The heat energy utilization rate of the flat-plate solar heat absorbing device that collects heat with air is low, and the heat energy of the sun cannot be fully utilized. Low

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