CN201191091Y - Flat plate type solar energy water-heater - Google Patents

Abstract

The utility model provides a flat plate solar water heater with high heat transfer efficiency, which comprises a water tank and a flat plate heat collector, wherein the flat plate heat collector comprises a shell, a transparent cover board and a heat absorption board in the shell, the heat absorption board is formed by a plurality of heat pipes in which heat conductive mediums are arranged, the evaporation sections of the heat pipes are provided with fins, and the condensation sections of the heat pipes are inserted into the water tank to be connected in a sealing type. The utility model adopts the heat pipes of low thermal resistance and high heat transfer efficiency to form the heat absorption boards, thereby improving the heat transfer efficiency of the flat plate solar water heater.

Description

A flat plate solar water heater

technical field

The utility model relates to a flat solar water heater.

Background technique

Existing flat-plate solar water heaters include a water tank and a flat-plate heat collector, and the flat-plate heat collector includes a shell, a transparent cover plate, and a heat-absorbing plate arranged in the shell. The heat absorbing plate is connected by copper or aluminum heat absorbing fins and copper heat collecting tubes. The characteristic of this heat absorbing plate is that the surface of the heat absorbing plate is coated with a selective absorption coating. This coating can make The heat absorbing plate absorbs more solar radiation, and can reduce the radiation heat loss of the heat absorbing plate to the environment. The copper heat collecting pipe communicates with the water tank. Its working process: sunlight shines on the heat absorbing plate through the transparent cover plate, most of the solar radiation energy is absorbed by the heat absorbing plate, converted into heat energy, and transmitted to the water in the copper heat collecting tube. After the temperature rises, the hot water in the copper heat collecting tube circulates naturally depending on the density difference with the cold water, and completes the heating of the water in the water tank.

This flat-panel solar water heater cannot resist freezing, so it can only be used in the south; and it only relies on the natural circulation of the density difference between cold and hot water, so the heat transfer efficiency is low;

Contents of the invention

The purpose of the utility model is to provide a flat plate solar water heater with high heat transfer efficiency.

The flat-plate solar water heater includes a water tank and a flat-plate heat collector; the flat-plate heat collector includes a shell, a transparent cover plate, and a heat-absorbing plate arranged in the shell; the heat-absorbing plate is composed of a plurality of heat pipes, and the inside of the heat pipe There is a heat-conducting medium; the evaporation section of the heat pipe has fins; the condensation section of the heat pipe extends into the water tank and is sealed with it.

The utility model adopts heat pipes with small thermal resistance and high heat transfer efficiency to form a heat absorbing plate, which can greatly improve the heat transfer efficiency of the water heater.

In the water heater mentioned above, the heat transfer medium contains an antifreeze agent. Adding antifreeze to the heat conduction medium of the heat pipe and utilizing the unidirectional heat conduction performance of the heat pipe can greatly improve the antifreeze performance and heat preservation performance of the water heater, so that the flat water heater can be used not only in the south, but also in the north.

In the water heater mentioned above, the water tank is a pressurized water tank. The pressurized water tank can discharge water under pressure when bathing, and the bathing is comfortable.

In the water heater mentioned above, the surface of the fins has a selective absorption coating. The selective absorbing coating can absorb more solar radiation, and can reduce the radiation heat loss of the heat absorbing plate to the environment.

Description of drawings

Fig. 1 is a side view of a flat-plate solar water heater.

Figure 2 is a schematic diagram of the connection between the water tank and the flat-plate heat collector.

Detailed ways

The flat-plate solar water heater shown in Figures 1 and 2 includes a water tank 1 and a flat-plate heat collector 2 . The flat plate heat collector includes a shell 3, a transparent cover plate 4, and a heat absorbing plate 5 arranged in the shell. The heat absorbing plate is made up of a plurality of heat pipes 6 . There is a heat conduction medium in the heat pipe; the heat conduction medium contains antifreeze. The evaporating section 7 of the heat pipe has fins 8; the surface of the fins has a selective absorbing coating. The condensing section 9 of the heat pipe stretches into the water tank 1 and forms a sealing connection with the water tank wall.

Claims (4)

1. A flat-plate solar water heater comprises a water tank and a flat-plate heat collector, and the flat-plate heat collector comprises a housing, a transparent cover plate, and a heat-absorbing plate arranged in the housing, and it is characterized in that: the heat-absorbing plate is composed of It is composed of multiple heat pipes, and there is a heat-conducting medium in the heat pipe; the evaporation section of the heat pipe has fins; the condensation section of the heat pipe extends into the water tank and is sealed with it. 2. The water heater according to claim 1, characterized in that: the heat transfer medium contains antifreeze. 3. The water heater according to claim 1, wherein the water tank is a pressurized water tank. 4. The water heater according to claim 1, characterized in that: the surface of the fin has a selective absorbing coating.

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