CN201138074Y - A solar water heater that can use up all the hot water - Google Patents

Abstract

The utility model relates to a solar water heater that can completely use up the hot water, and is characterized in that a pressure water pipe 3 is additionally arranged inside the vacuum pipe of a vacuum-pipe solar water heater and is inserted to the bottom of the vacuum pipe. When the normal hot water inside the water tank is used up, a tap-water switch 4 is switched on, so that the hot water that is in the vacuum pipe and cannot flow back to the water tank can be pushed back to the water tank for use under the pushing power of the tap water. The solar water heater has the advantages that a pressure water pipe with low cost is used to realize the high efficiency of the solar heater that can use up 100 percent of the heated water.

Description

A solar water heater that can use up all the hot water

1. Technical field

The utility model relates to a solar water heater, in particular to a solar water heater with vertically arranged ordinary vacuum tubes.

2. Background technology

Vertically arranged common vacuum tube solar water heaters on the market at present, its vacuum tube bottom is closed, and opening is upwards and is fixedly installed by certain angle of elevation. Therefore, when the hot water in the water tank was used up, a certain amount of hot water remained in the vacuum tube all the time and could not be utilized. Such as a well-known water heater "Redong 20" retains hot water up to 60 liters. This heated hot water cannot be used, which is actually a waste, and it also reduces the thermal efficiency of the water heater.

3. Contents of the invention

In order to fully utilize the unusable hot water trapped in the vacuum tubes, the utility model provides a solar water heater that utilizes water pressure as power to push the hot water trapped in the vertical vacuum tubes back into the water tank for utilization. Hot water utilization can reach almost 100%

The utility model is characterized in that in the vertically arranged common vacuum tube water heater, the pressure-increasing water tube 3 is inserted into the bottom of the vacuum tube, and is sealed and connected with the municipal tap water switch 4 . When the tap water switch is turned on, due to the high pressure and fast flow of tap water, a pushing interface is formed in the vacuum tube from bottom to top. When the water flow rate is greater than the heat transfer rate, the hot water in the vacuum tube can be "pushed" back into the water tank for use in a short time. At this point, only cold water remains in the vacuum tube. In fact, tap water on 4 is the water inlet switch of the water heater, but the water enters the water tank through the bottom of the vacuum tube.

There are two situations during use: the one is that when the normal hot water in the water tank is used up, the tap water switch 4 is opened, and the hot water trapped in the vacuum tube is pushed back into the water tank by water pressure, (the bigger the vacuum tube inner diameter increases more hot water) turn off the tap water switch, and then use the increased hot water as normal. The 2nd, when water tank was full of hot water, open tap water switch, also can push the hot water in the vacuum tube back to water tank, now hot water can only flow out for use by water tank overflow pipe.

The beneficial effect of the utility model is that the high efficiency that almost 100% of the water heated by the solar water heater can be used up can be realized by adding low-cost pressure water pipes.

4. Description of drawings:

Accompanying drawing is the sectional view of solar water heater single vacuum tube embodiment, among the figure, 1 is water tank, and 2 is vacuum tube, and 3 is pressure water pipe, and 4 is tap water switch (water heater water inlet switch), and support is not drawn among the figure.

Five, specific implementation

The manufacturing method of the water heater adopts the traditional process requirements unchanged, but the increased pressure water pipe 3 has the following special requirements;

(1) The pressure water pipe and the tap water switch must be reliably and tightly connected.

(2) Make sure that the pressure water pipe is inserted into the bottom of the vacuum pipe. If half of it is inserted, only half of the hot water in the vacuum pipe can be used.

(3) The diameter flow rate of the pressure water pipe is designed to be 1/3-1/2 of the diameter flow rate inside the vacuum tube, which will affect the heating function of the vacuum tube as little as possible.

Claims (1)

1. Can all use up the solar water heater of hot water, it is characterized in that increasing penstocks (3) and constitute in the vacuum tube of vacuum tube water heater, described penstocks connect water inlet switch and are inserted into the bottom of vacuum tube always.

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