JPS6011401Y2 - Drainage device for solar water heater - Google Patents

Description

[Detailed description of the invention] This invention is a natural circulation solar water heater in which the tank is placed on top and the heat sink is placed on the bottom, and the temperature is raised by natural circulation of water through heat convection, leaving hot water in the tank. This invention relates to an improvement in a water draining device that drains water from a heat sink.

As shown in FIGS. 1 and 2, the water draining device described above has two circulation pipes 1 and 2 that connect tank a and a heat sink, with one 2 facing above tank a. The other side is folded back in an inverted U shape so that the other side faces the bottom of the tank a, and the top end of the inverted U shape is also provided with an upward opening hole 2a to prevent water from freezing. When draining water, in order to drain water while leaving hot water in tank a, turn on/off valve 4' at the drain port of the heat sink to check the amount of water in tank a and the heat sink. Visually check the drainage status of the water inside the tank.
The operation is cumbersome because adjustments must be made.

The present invention was devised in order to solve the problems of the conventional technology, and it is a simple and easy method that allows only the heat sink to be drained automatically while leaving the hot water in the tank. The purpose is to provide a new water draining device for solar water heaters.

Hereinafter, the present invention will be described with reference to illustrative embodiments.

In Fig. 3, A is a solar water heater, which has a hot water storage tank a arranged above, a solar acid heat sink arranged below, and a folded part rising from both sides of the heat sink. It is connected by two rising pipes 1 and 2.

The folded end 21 of one pipe 2 opens at the bottom of the hot water tank a, and the folded end 11 of the other pipe 1 opens at the top of the hot water tank a.

In addition, the pipe 2 with the folded end 21 opened downward as described above is also provided.
A low-temperature operating valve 3 that is automatically activated by a thermostat or the like is provided at the folded top 22 of the pipe 1, and this top 22 and the other pipe 1
The uppermost part 12 of the folded part is connected with an air communication pipe 5.

Furthermore, a check valve 6 for venting air is provided at the folded top 22 of the pipe 2.

The air venting check valve 6 may be provided at the folded top 12 of another pipe 1 together with the low temperature operation valve 3.

Further, the check valve 6 for air venting may be provided at the uppermost portions 12 and 22 of both folds, and in this case, the air communication pipe 5 may be omitted.

7 is a hot water supply port of the hot water storage tank a, and 4 is a low temperature operation valve (or drain port) of the solar heat storage device a.

8 is a water supply device with a pole tap, and 81 is a pole tap.

The uppermost parts 12 and 22 of both folds are aligned and positioned so that the low temperature operation valve water stop position is located between the full water position A and the valve open position of the pole tap 81.

Reference numeral 82 denotes a water supply cylinder of the water supply device 8 with a pole tap, and its diameter is larger than that of the drain port of the heat sink. However, if water is being supplied from the water supply cylinder 82 into the hot water storage tank a, the water level will rise.

Next, the water draining function of the solar water heater A configured as described above will be explained.

Normally, when hot water is used, the low-temperature operation valves 3 and 4 are closed, and the hot water level in the hot water storage tank a repeatedly moves up and down between the ball tap full water position a and the pole tap open position.

Circulation between the heat sink and the hot water storage tank a is carried out by the siphon action of the two rising pipes 1 and 2 with folded parts.

Now that the temperature is dropping, the low temperature operation valve 3 is closed due to the action of thermostat etc.
, 4 automatically open, air is sucked in from the upper low-temperature operating valve 3 via the air venting check valve 6, and water is discharged from the lower low-temperature operating valve 4.

At this time, the two pipes 1 are connected via the air communication pipe 5.
, 2, the air pressure at each folded portion is made equal.

Then, when the hot water level drops to the low temperature operation valve water stop position,
At that position, the siphons of both pipes 1 and 2 are cut off, and water discharge automatically stops.

At the same time, the movable valve 61 of the check valve 6 for air venting is lowered as shown in FIG. 4 to close the valve port.

This completes draining the water from the heat sink.

At this time, the hot water surface in the hot water storage tank a is located above the opening position of the pole tap, so the pole tap 81
The valve is not open.

In this case, the amount of water discharged when the automatically operated low-temperature operating valve 3゜4 is opened is a small amount from the pole tap full water position A to the low-temperature operating valve water stop position, and this amount is compensated by the water supply. Even so, the drop in the temperature of the hot water in the hot water storage tank a is extremely small.

Next, in order to use the drained heat sink again to naturally circulate water, the water is discharged through the hot water supply lower of the hot water storage tank A, and the hot water surface is in the low temperature operation valve water stop position, and the pole tap is in the valve open position. Water is actively reduced to the mouth, water is automatically supplied from the water supply cylinder 82 using the control operation of the water supply device 8 with a pole tap, and the water level is raised to the full water position A.

At this time, heat sink b1 hot water storage tank a1 riser pipe 1,
The air inside 2 is pushed out into the atmosphere from a check valve 6 for air venting.

As described above, in the present invention, there is a hot water storage tank located above, a solar heat storage device located below, and an upper end that rises from both sides of the solar heat storage container and enters the hot water storage tank. The folded end of one of the two pipes opens at the bottom of the hot water storage tank, and the other pipe has a folded end that is folded downward in a U-shape. The folded end of the pipe opens at the top of the hot water storage tank, and a low-temperature operation valve and a check valve for air venting are installed at the top of one of the pipes, and the top of this top and the top of the other pipe are installed. A hot water supply port is opened in the tank, and a water supply device with a pole tap is provided, and the folded part is connected between the water level of the pole tap at its closed position and the water level at its open position. Now that the tops of the two attached pipes have been positioned, install the water supply device 8 with a pole tap in the hot water storage tank a so that the water level in the hot water storage tank will rise and fall between the predetermined upper and lower water levels. ,
While the water supply is automatically controlled and the ice removal to prevent freezing is automatically performed at a predetermined temperature using the low temperature operation valve 3.4, when the water is removed, the water in the hot water tank a is The water inside the heat sink can be reliably extracted without causing the temperature of the hot water to drop too much.

[Brief explanation of the drawings] Figures 1 and 2 are schematic explanatory diagrams of a conventional solar water heater during circulation and water removal, Figure 3 is a vertical cross-sectional view of the solar water heater of the present invention, and Figure 4 is a It is a longitudinal cross-sectional view of the automatic air vent valve of the solar water heater same as the above. Explanation of drawing symbols, A...Solar water heater, a...
... Hot water storage tank, b ... Heat sink, 1, 2.
...Rising pipe, 11.21...Folded end, 3,4...Low temperature operation valve, 5...Air communication pipe, 6... ...Automatic air vent valve.

Claims (1)

[Scope of utility model registration request] A hot water storage tank arranged above, a solar acid heater arranged below, and a folded structure that rises from both sides of the solar acid heat heater, plunges into the hot water storage tank, and folds its upper end downward in an inverted U shape. One of the two pipes has its folded end opening at the bottom of the hot water storage tank, and the other pipe has its folded end opened at the bottom of the hot water storage tank. A low-temperature operating valve and a check valve for air venting are provided at the top of one of the pipes, and this top is connected to the top of the other pipe by an air communication pipe. , a hot water supply port is opened in the tank, and a water supply device with a pole tap is installed, and the tops of the two pipes with folded parts are positioned between the water level of the ball tap at its valve closing position and the water level at its valve opening position. A water drain device for solar water heaters that features the following features: