JPH029339Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a hot water storage type water heater that is capable of supplying a small amount of hot water, a medium amount of hot water, and a large amount of hot water using a natural convection method without using a circulation pump.

In the conventional hot water storage type water heater of this type, as illustrated in FIG. It has a structure in which a water supply pipe 21' is connected to the lower part of the tank 1'. Therefore, it is fine for small quantity hot water supply, but for large quantity hot water supply, it is necessary to circulate and convect the water stored above and below the heating device D' in the hot water tank 1' (the water stored in the entire hot water tank). Piping 2
2' and circulation pump P' are required. In other words, when supplying a small amount of hot water, the circulation pump P' is stopped and the hot water tank 1'
Only the water stored in the upper chamber A' above the heating device D' inside is convectively heated and heated by the heating operation by the heating device D', so if only the water stored in the upper chamber A is used, it can be used for a small amount of hot water supply. However, in the case of large-volume hot water supply, it is necessary to use the water stored in the upper chamber A' and the water stored in the lower chamber B' below the heating device D' by convection heating (the water stored in the entire hot water storage tank). ' is operated to force the water stored in the upper chamber A' and lower chamber B' to circulate and convect, heating it up and supplying a large amount of hot water. In the case of this large-volume hot water supply, a circulation pump P′ is always required, which consumes a significant amount of driving power, and it also has many disadvantages in actual use, such as the impossibility of supplying medium-sized hot water. It was hot.

This invention was made with the aim of eliminating such drawbacks, and its configuration is such that the hot water storage tank is divided into a plurality of tanks vertically by a partition wall, a water supply pipe is provided in the lower tank, and an outlet pipe is provided in each tank. In a water heater with a heating device installed in the lower tank, a through hole and a chimney-like duct are provided separately in the partition wall that partitions each tank, and one or both of them is equipped with an on-off valve. This relates to the invention of a hot water storage type water heater characterized by the following: It enables convection throughout the chambers of each tank, and enables efficient heating according to the amount of hot water supplied by connecting or shutting off each tank by opening and closing an on-off valve. , it is possible to supply small, medium, and large amounts of hot water based on the natural convection method without using a circulation pump, thereby increasing the energy saving effect by improving the convenience and economy of use.

One embodiment will be described below in detail based on the drawings. In FIGS. 1 to 3, 1 is a hot water storage tank, and the inside thereof is divided into upper, middle, and lower three tanks A by upper and lower partition walls 2 and 3. , B, and C. On one side of the partition walls 2 and 3, through holes 6 and 7 for installing on-off valves 4 and 5 are provided so as to maintain the same axis.
In addition to making it possible to communicate and cut off communication between tanks A and C through the through holes 6 and 7, chimney-shaped ducts 8 and 9 are installed on the other side to connect each tank A, B, and C. They are constantly communicated via ducts 8 and 9. The chimney-shaped ducts 8 and 9 have openings 8a and 9a extending vertically, with the lower duct 8 extending vertically to the vicinity of the upper partition wall 3, and the upper duct 9 extending vertically to the vicinity of the upper wall 1a of the hot water tank 1.
, and both ducts 8 and 9 are arranged so as to maintain the same axis. D is a heating device that uses a gas burner as a heating source, and is placed in the bottom tank A.
It consists of a gas burner 10, a heat exchanger 11, an exhaust pipe 12, etc., and the exhaust pipe 12 vertically penetrates the inside of the hot water storage tank 1 and protrudes from the top of the hot water storage tank 1 to effectively utilize the exhaust heat. That's what I do. 1
3 is a gas supply pipe to the gas burner 10.

Note that, of course, the heating source of the heating device D may be an electric heating device or the like in addition to the gas burner described above. Reference numeral 14 denotes a small quantity hot water supply outlet pipe equipped with a hot water supply valve 15, which is connected to the upper part of one side of the tank A at the bottom. Reference numeral 16 denotes a medium-capacity hot water supply outlet pipe equipped with a hot water supply valve 17, and is connected to the upper part of one side of the tank B in the intermediate portion. Reference numeral 18 denotes a large quantity hot water supply outlet pipe equipped with a hot water supply valve 19, which is connected to the top of the uppermost tank C.
These outlet pipes 14, 16, and 18 are connected to a hot water supply pipe 20, respectively. A water supply pipe 21 is connected to one side of the tank A at the bottom of the hot water storage tank 1. Incidentally, the installation positions and numbers of the through holes 6, 7 and the chimney-shaped ducts 8, 9 in which the on-off valves 4, 5 are installed are not limited to the above embodiments, but can be set as appropriate. Furthermore, the on-off valves 4, 5 may be incorporated into the chimney-like ducts 8, 9, and either or both of the through holes 6, 7 and the chimney-like ducts 8, 9 may be provided with the on-off valves.

In the above configuration, in the case of small quantity hot water supply, as shown in FIG.
5 are closed together and each tank A, B,
When communication with C is cut off and the water stored in the hot water tank 1 is heated by the heating device D, the water stored in the hot water storage tank 1 reaches its maximum level even though the tanks A, B, and C are connected through chimney-shaped ducts 8 and 9. The temperature is increased by convection only in the lower tank A (see arrow a in Figure 1). By opening only the hot water valve 15 provided in the small amount hot water supply outlet pipe 14 and opening/closing the hot water supply tap (not shown), the heated hot water in the tank A at the bottom is transferred to the small amount hot water supply outlet pipe 14. It is led out from the hot water supply pipe 20 via the hot water supply pipe 20. In this case, only the water stored in tank A at the bottom is heated and heated by convection, so that the set hot water temperature is reached very quickly and very economically.

Next, in the case of medium-capacity hot water supply, as shown in Fig. 2, the on-off valve 4 of the lower partition wall 2 is opened to enable communication through the through hole 6 between tank A at the bottom and tank B at the middle, and then the upper partition When the opening/closing valve 5 of the wall 3 is still closed and the communication through the through hole 7 between the intermediate tank B and the uppermost tank C is cut off, the hot water storage tank 1 is heated by the heating operation by the heating device D.
For water storage inside, tank A at the bottom and tank B at the middle are through holes 6.
Since both tanks A and B are connected to each other by a chimney-shaped duct 8, the water stored in both tanks A and B is heated and heated by convection through the through hole 6 and the duct 8 (see arrow b in FIG. 2). Therefore, the hot water supply valve 1 provided in the outlet pipe 16 for medium volume hot water supply
By opening only the hot water tank 7 and opening/closing the hot water supply valve (not shown), the heated hot water in both tanks A and B is led out from the hot water supply pipe 20 via the medium volume hot water supply pipe 16. In this case as well, since only the water stored in the tank A at the bottom and the tank B at the middle are heated and heated by convection, it is economical to reach the set hot water supply temperature relatively quickly.

Furthermore, in the case of large-volume hot water supply, as shown in Fig. 3, open the on-off valves 4 and 5 of the upper and lower partition walls 2 and 3, and open the lowermost tank A, the middle tank B, and the uppermost tank by opening the through holes 6 and 7. When the lower tank C is enabled to communicate, the water stored in the hot water tank 1 is heated by the heating device D, and the tanks A, B, and C are connected through the through holes 6, 7 and the chimney-shaped ducts 8, 9. Therefore, the water stored in each tank A, B, and C, that is, the water stored in the entire hot water tank 1, is stored in the through holes 6 and 7.
The temperature is increased by convection through the ducts 8 and 9 (see arrow c in Figure 3). Therefore, by opening only the hot water supply valve 19 provided on the outlet pipe 18 for bulk hot water supply and opening/closing the hot water supply tap (not shown), the hot water storage tank 1
The heated hot water inside is led out from the hot water supply pipe 20 via the large quantity hot water supply outlet pipe 18.

In addition, in the above hot water supply operation, the on-off valves 4 and 5
The switching operations of the hot water supply valves 15, 17, and 19 are performed either manually or automatically.
In addition, the amount of water stored can be set to only the lower tank in the case of small quantity hot water supply, and a two-stage switching type using the lower tank and the upper tank in the case of large quantity hot water supply, but the implementation is free.

As explained above, in this design, the through holes and chimney-like ducts are provided separately in the partition wall that separates multiple upper and lower tanks, so when the through holes and ducts between each tank are connected, Convection occurs throughout the tank and the temperature of each tank can be raised sufficiently, and each tank can be communicated or It can be shut off and heated efficiently according to the required amount of hot water. In the case of the three tanks in the example, when supplying a small amount of hot water, all on-off valves are closed and only the water stored in the bottom tank is allowed to circulate, allowing rapid heating, and when supplying a medium amount of water, the partition between the bottom and middle tanks can be closed. By opening the on-off valve on the wall, the stored water can be heated quickly by convection only in the bottom and middle tanks, allowing the set hot water temperature to be reached quickly.

In addition, according to this invention, the structure is such that small-volume hot water supply, medium-volume hot water supply, and large-volume hot water supply can be performed separately under natural convection without using a circulation pump. Since the amount of stored water that is heated and heated is different depending on hot water supply, medium volume hot water supply, and large volume hot water supply, the fuel consumption required for the heating device can be saved, making it extremely economical, and the structure is extremely simple, making it easy to manufacture. It has the advantage of being able to be provided at a low price.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of this invention during small quantity hot water supply, Fig. 2 is a sectional view during medium quantity hot water supply, Fig. 3 is a sectional view during large quantity hot water supply, and Fig. 4 is a sectional view of the conventional example. FIG. 1... Hot water tank, 2, 3... Partition wall, A, B, C
...Divided tank, 4, 5...Opening/closing valve, 6,7...
Through hole, 8, 9...Chimney-like duct, D...Heating device.

Claims (1)

[Scope of utility model registration request] In a water heater in which the hot water storage tank is divided vertically into multiple tanks with a partition wall, a water supply pipe is provided in the lower tank, a lead-out pipe is provided in each tank, and a heating device is installed in the lower tank, each tank is A hot water storage type water heater characterized by having a through hole and a chimney-like duct spaced apart from each other in a dividing partition wall, and having an on-off valve in either or both of them.