JPH0438200Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to solar water heaters, and in particular allows users to adjust the amount of hot water stored from the ground according to the season, weather, etc. to reach a desired temperature. Regarding a solar water heater that provides

[Prior Art] In a solar water heater, the amount of solar radiation is low on cloudy days or in the winter, and the temperature of the water supplied is low, especially in the winter, so when the water heater is filled with water, the desired temperature cannot be achieved. Therefore, it may be possible to adjust the amount of hot water stored and raise the temperature to a certain level depending on the season and weather.

A conventional method for adjusting the amount of hot water stored in a solar water heater is shown in FIGS. 5 and 6. Fig. 5 shows a method of changing the length of the float support rod 3A of the water supply ball tap provided in the hot water storage tank 1, and Fig. 6 shows a method of changing the length of the float support rod 3A of the water supply ball tap provided in the hot water storage tank 1.
This method adjusts the float stopping liquid level by changing the angle of the float.

On the other hand, in order to achieve the same purpose, Utility Model Application No. 60-125465 provides a partition wall with a height that does not reach the bottom between the cistern of the hot water tank and the upper hot water outlet, and also connects this partition wall with the hot water outlet. We are proposing a solar water heater in which a pipe with an open top and bottom that can be moved up and down while maintaining airtightness is installed in the ceiling between the outlet and the outlet.

[Problems to be solved by the invention] However, in the case of these conventional technologies, in order to adjust the amount of hot water stored to correspond to seasonal changes, daily weather, latitude, etc. Therefore, adjustment work is required each time. Therefore, the user is also required to have considerable knowledge about the equipment. Additionally, working at heights was difficult and dangerous.

In particular, in the case of Utility Model Application Publication No. 60-125465, the hot water in the hot water storage tank is constantly exposed to the outside air through vertical opening pipes for water level adjustment, which is disadvantageous in terms of heat loss. It was hot.

The purpose of the present invention is to provide a solar water heater that allows a user to adjust the amount of hot water stored on the ground according to the season, weather, etc., and obtain a desired temperature.

[Means for Solving the Problems] In order to achieve the above object, the present invention divides at least the upper part of the tank into an air-filled space and a space communicating with the outside that is equipped with a ball tap for filling water to a predetermined height. In a solar water heater having a hot water storage tank, there is an air vent pipe that removes air from the air-filled space without contacting the water surface of the air-filled space, and a vent pipe that is attached to this air vent pipe and operated near the ground to remove the air from the air-filled space by rotating a pressure regulating screw. It is comprised of a pressure regulating vent valve that adjusts the amount of air, and changes the amount of air sealed in the air sealed space according to conditions such as the season or weather, and the air is adjusted to a predetermined water level by a ball tap on the side of the space communicating with the outside. We propose a solar water heater equipped with a venting mechanism that adjusts the water level in the enclosed space and changes the amount of water held in the entire hot water storage tank.

[Function] In the present invention, the air vent mechanism includes an air vent pipe that removes air from the air enclosed space without coming into contact with the water surface of the air enclosed space, and an air vent valve that is attached to the air vent pipe and is operated near the ground. This allows the user to easily adjust the amount of hot water stored without having to go up to a high place. Therefore, it is possible to respond quickly and accurately not only to seasonal changes in solar radiation such as winter and summer, but also to daily changes in weather.

Further, since the air venting mechanism of the present invention is normally maintained in an airtight state, there is no heat loss as in the above-mentioned Utility Model Application Publication No. 125465/1983.

Furthermore, no special knowledge or special tools are required to adjust the amount of hot water stored.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a system diagram showing an embodiment of the solar water heater of the present invention. First, to explain the configuration, a partition plate 2 divides the inside of the hot water storage tank 1 of the solar water heater from the top to a position slightly above the opening of the hot water return pipe 7.
is provided, and only the upper layer of the hot water tank 1 is divided into two chambers. Here, for convenience, the two rooms will be referred to as a hot water storage room 4 and a water supply room 5. A vent pipe 10 is connected to the upper part of the hot water storage chamber 4, and a vent valve 11 is provided at one end of the vent pipe 10. Further, the water supply chamber 5 is provided with a ball tap 3 and an overflow pipe 12. In addition, 6 is a heat collector, 8 is a cold water supply pipe to this heat collector, 9 is a hot water supply pipe, 13 is a water supply pipe,
14 is a water supply valve, and 15 is a hot water supply valve.

Next, the effect will be explained. When it is desired to reduce the amount of water held in the hot water storage tank 1 in winter or on days with little sunlight, the vent valve 11 provided at the end of the vent pipe 10 is closed.
In this state, the water supply pipe 13 connected to the ball tap 3
When the water supply valve 14 provided in the hot water tank 1 is opened, water supply to the hot water tank 1 is started by the water supply operation of the ball tap 3. When the liquid level in the hot water storage tank 1 reaches the lower part of the partition plate 2, the air in the hot water storage chamber 4 created by the partition plate 2 will be removed from the liquid level in the hot water storage tank 1 and It is enclosed in the hot water storage tank 1 with a partition plate 2.
The liquid level in one water supply chamber 5 is the same as the overflow pipe 12.
Since the air is discharged from the float, the ball tap 3 rises to the float stop position, and water supply is stopped. The amount of water held in the hot water tank 1 in this state is less than the maximum amount of water held (full water amount). This liquid level is located above the opening of the hot water return pipe 7 that guides the hot water heated by the heat collector 6 into the hot water storage tank 1, and does not impair natural circulation.

When collecting heated water, the water level in the water supply chamber 5 is lowered by closing the water supply valve 14 and opening the hot water supply valve 15 of the hot water supply pipe, as in the normal batch method.
The liquid level reaches the lowest part of the partition plate 2. There, air flows into the hot water storage chamber 4 under the partition plate 2, and all the hot water is discharged.

When the maximum amount of water held in the hot water tank 4 is required in summer or on a day with a lot of sunshine, the vent valve 11 provided at the end of the vent pipe 10 is opened. When water supply is started in this state as described above, the air in the hot water storage chamber 4 is discharged from the vent valve 11 via the vent pipe 10, and the maximum amount of water can be secured as in the conventional case.

Other embodiments are shown in FIGS. 2 and 3. To explain the configuration of these embodiments, FIG. 2 shows a hot water storage tank separated into two chambers, a hot water storage chamber 4 and a water supply chamber 5, and a pipe 5A connecting both chambers at the liquid level of the amount of water to be reduced. This is an example of connecting by. Figure 3 shows an example in which the air vent pipe 10 connected to the hot water storage chamber 4 is inserted from the bottom of the hot water storage tank 1, and its opening is positioned above the liquid level of the hot water storage tank at the maximum amount of water held. It is.

The operations of the embodiments shown in FIGS. 2 and 3 are the same as those of the embodiment shown in FIG. 1, and will therefore be omitted here.

In place of the air vent valve 11, a pressure regulating air vent valve shown in FIG. 4 may be used.

The configuration of the pressure regulating vent valve will be explained next.

Inside the body 16 is a valve opening 1 at its lower part.
A valve seat 19 that opens and closes the valve seat 8, a stem 20 that supports the valve seat 19, and a spring 22 that pushes the valve seat 19 downward are provided. This spring 22
An open hook 17A is formed at the bottom of the pressure adjustment screw 17, which is adjusted by the pressure adjustment screw 17. A valve opening 18 in the body 16 is connected to a vent pipe 10 from the solar water heater.

The operation of the pressure regulating vent valve constructed in this way will be described. If you want the amount of hot water stored in the hot water storage tank 1 to be between the minimum amount of water held and the maximum amount of water held, screw the pressure regulating screw 17 to a certain position before opening the water supply valve, and the spring 22 will be compressed. The repulsive force presses the valve seat 19 downward.

When the water supply valve 14 is opened in this state, water supply to the hot water tank 1 is started by the liquid level control operation of the ball tap 3, and the lowest part of the partition plate 2 separates the upper air layer into two chambers, and water supply continues. It will be done. As the water supply progresses, a difference begins to occur in the liquid level between the hot water storage chamber 4 and the water supply chamber 5. At this time, the air sealed in the hot water storage chamber 4 has
A pressure equivalent to the liquid level difference is applied. When this pressure becomes larger than the repulsive force of the spring 22 in the pressure regulating vent valve, the air in the hot water storage chamber 4 pushes up the valve seat 19 and is discharged from the vent hole 23. The liquid level in the hot water storage chamber 4 rises by the amount of air discharged, and the difference in liquid level between the hot water storage chamber 4 and the water supply chamber 5 decreases. By repeating this operation, the liquid level in the water supply chamber 5 eventually reaches the position where the ball tap closes. There the water supply will stop. At this time, the difference in liquid level between the hot water storage chamber 4 and the water supply chamber 5 is:
Valve seat 19 of spring 22 in pressure regulating vent valve
The difference in water head is just enough to match the repulsive force pushing down. Therefore, the liquid level in the hot water storage chamber 4 can be maintained at any desired position by adjusting the spring 22 in the pressure regulating vent valve.

On the other hand, when obtaining the minimum amount of water stored,
If the pressure adjustment screw 17 is further screwed in so as to obtain a repulsion force greater than the pressure generated by the maximum liquid level difference between the water supply chamber 5 and the water supply chamber 5, the air in the hot water storage chamber 4 will not be discharged and the amount of water retained will be the minimum.

To obtain the maximum amount of water, loosen the pressure regulating screw 17 and lift the stem hook 21 above the stem 20 with the release hook 17A, the pressure regulating vent valve will always open and the air in the hot water storage chamber 4 will not be sealed. Since the water is discharged from the air vent hole 23, the maximum amount of water can be obtained.

For operational reasons, the pressure regulating screw 17 preferably has a large pitch and is left-handed. Furthermore, since the minimum amount of water to be held is determined at the lowest part of the partition plate 2, using this pressure regulating vent valve allows any amount of water to be kept within the minimum to maximum range at any time.

[Effect of the idea] According to this invention, the following effects can be obtained.

(1) By reducing the amount of hot water stored, the desired temperature can be achieved even on days with little sunlight or when the water supply temperature is low in winter.

(2) Since the vent valve can be installed in a location where it is easy to operate, the amount of hot water stored can be adjusted on the ground without the need for the user to go up to a high place or the roof, and there is no danger.

(3) The operation is only simple valve operation, and the user does not need any knowledge of special equipment or special tools.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing an embodiment of the solar water heater according to the present invention, Fig. 2 is a system diagram showing an embodiment in which the hot water storage room and the water supply room are separated, and Fig. 3 is a system diagram showing an embodiment in which the hot water storage chamber and the water supply room are separated. A system diagram showing an example in which the hot water is inserted and placed from the bottom, Figure 4 is a sectional view showing the structure of a pressure regulating vent valve used to adjust the amount of hot water stored, and Figures 5 and 6 show a conventional water level adjustment method. It is a schematic diagram. 1... Hot water storage tank, 2... Partition plate, 3... Ball tap, 3A... Float support rod, 4... Hot water storage chamber, 5...
...Water supply room, 5A... Connection pipe, 6... Heat collector,
7...Hot water return pipe, 8...Cold water feed pipe, 9...Hot water supply pipe, 10...Air vent pipe, 11...Air vent valve, 1
2... Overflow pipe, 13... Water supply pipe, 14
... Water supply valve, 15 ... Hot water supply valve, 16 ... Body,
17...Pressure adjustment screw, 17A...Release hook, 18
... Valve opening, 19 ... Valve seat, 20 ... Stem, 21 ... Stem hook, 22 ... Spring, 23 ... Air vent hole.

Claims (1)

[Scope of Claim for Utility Model Registration] A solar water heater having a hot water storage tank in which at least the upper part of the tank is divided into an air-filled space and a space communicating with the outside and having a ball tap for filling water to a predetermined height, It consists of an air vent pipe that removes air from the enclosed space without contacting the water surface of the space, and a pressure regulating vent valve that is attached to the air vent pipe and operated near the ground to adjust the amount of enclosed air by rotating a pressure regulating screw. , the amount of air enclosed in the air enclosed space is changed according to conditions such as the season or the weather, and the water level in the air enclosed space is adjusted to a predetermined water level by a ball tap on the side of the space communicating with the outside, and the entire hot water storage tank is heated. A solar water heater characterized by being equipped with a venting mechanism that changes the amount of water held.