JPH0440095Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a mixing tank installed in a water heater and used to equalize the temperature of hot water.

<Prior Art> There is a conventional water heater having a configuration as shown in FIG. 3, in which a mixing tank is provided midway in order to improve hot water output characteristics. First, this conventional device will be explained. Hot water heated by a burner 2 in an instantaneous heat exchanger 1 is sent through a hot water feed pipe 3 to a mixing tank 4, and then from the mixing tank 4 through a hot water supply pipe 5 to be supplied with hot water. Ru.

When operation is started now, hot water is sent into the tank 4 through the feed pipe 3, and after the tank 4 is filled with hot water, hot water is supplied through the hot water supply pipe 5.

<Problems to be solved by the invention> However, especially in instantaneous heating type water heaters, even those with a mixing tank as described above, an abnormal sound called water hammer occurs when the hot water tap is suddenly closed. There were problems caused by the piping and equipment inside the vessel.

Therefore, one of the purposes of this invention is to prevent the abnormal noise that occurs in conventional devices when the lock is suddenly closed.
Let's do one.

In addition, in conventional water heaters equipped with a mixing tank, if the mixing tank is simply made smaller to make the water heater more compact, it becomes difficult to equalize the temperature of the hot water in the mixing tank, resulting in poor hot water output characteristics. There was a problem.

Therefore, another object of the present invention is to provide a mixing tank that can effectively equalize the temperature of hot water even in a small mixing tank and has good hot water discharge characteristics.

<Means for Solving the Problems> In order to achieve the above object, the water heater of the present invention is characterized by the following configuration.

That is, the mixing tank of the water heater according to the present invention is the mixing tank of the water heater in which hot water from the heat exchanger is once sent to the mixing tank, and from the mixing tank, the hot water is further supplied to hot water through the hot water supply pipe. The hot water supply pipe penetrates from the ceiling of the mixing tank to the inside and opens a suction port at the lower end thereof, and an air vent small is installed on the side wall of the hot water supply pipe that penetrates the mixing tank at a position slightly lower than the ceiling. It is characterized by having holes. In the above, it is preferable that the lower end suction port of the hot water supply pipe is located at the lower part of the mixing tank.

Further, the mixing tank of a water heater according to the present invention is the mixing tank of a water heater in which hot water from a heat exchanger is once sent to the mixing tank, and from the mixing tank, the hot water is further supplied to hot water through a hot water supply pipe. The inside of the mixing tank is partitioned into a plurality of rooms between a hot water inlet and a suction port that are arranged at opposite positions, and a hot water flow port is opened near the center of the partition plate, Another feature is that an air circulation opening is provided in the upper part of the partition plate. And in this case,
It is preferable that the hot water feed pipe penetrates into the mixing tank and opens the hot water feed port downward within the mixing tank. Similarly, it is preferable that the suction port of the hot water supply pipe opens at the bottom of the mixing tank.

<Function> By opening the small air vent hole provided in the side wall of the hot water pipe that penetrates the mixing tank at a position slightly lower than the ceiling of the mixing tank, Air will always remain in the upper position. This retained air relaxes and absorbs the pressure that occurs when the hot water supply head is suddenly closed, thereby preventing the generation of abnormal noise when the hot water supply head is suddenly closed. Furthermore, hot water is supplied from the lower end suction port of the hot water supply pipe, and air is discharged little by little from the small air vent hole, which eliminates the problem of a large amount of air coming out at once when the door is opened, which impairs the usability.

On the other hand, the inside of the mixing tank is partitioned into multiple rooms between the hot water inlet and suction ports that are placed in opposite positions, and hot water is distributed between the rooms near the center of the partition plate. By doing so, the hot water sent into the mixing tank is not directly supplied with hot water, but is sufficiently mixed before being supplied with hot water. Moreover, since the hot water outlet is provided near the center of the partition plate, hot water that is too hot or too cold will not flow to the hot water supply side and be used for hot water supply. Furthermore, since air circulation holes are provided at the top of the partition plate, air can freely circulate between the partitioned rooms. In addition, since the hot water inlet is opened downward within the mixing tank, the mixing effect is increased. Furthermore, by opening the suction port of the hot water pipe at the lower part of the mixing tank, hot water is sucked in from the lower part, so there is no need to supply the hot part of the hot water.

<Example> FIG. 1 is a longitudinal sectional view of a mixing tank showing a first example of the present invention.

A hot water supply pipe 20 penetrates the mixing tank 10 from its ceiling 11 to the inside. A suction port 21 is opened at the lower end of the hot water supply pipe 20 that passes through the water supply pipe 20 . A small hole 22 for air venting is provided in the side wall of the hot water supply pipe 20 that has been penetrated. The position of this small air vent hole 22 is located at the ceiling 1 of the tank 10.
It is located at a position slightly lower than 1. By positioning the small air vent hole 22 somewhat away from the ceiling in this way, the small air vent hole 22 inside the tank 10 can be
The air in the upper space stays without coming out of the tank 10. Therefore, even if the hot water supply door is suddenly closed when hot water is being used, the resulting pressure is relaxed and absorbed by the stagnant air. Note that as long as the length of the hot water supply pipe to be penetrated is longer than the distance from the ceiling 11 where the air venting hole 22 is to be placed, it is sufficient for the opening of the small hole 22. However, by opening the lower end suction port 21 of the hot water supply pipe at the lower part of the tank 10, hot water from the upper part is not suddenly supplied. Furthermore, a large amount of air is not discharged from the suction port 21 at once, which impairs the feeling of use. During use of hot water supply, air is gradually discharged from the small holes 22.

FIG. 2 is a longitudinal sectional view of a mixing tank showing a second embodiment of the present invention.

A hot water feed pipe 30 from the heat exchanger side is connected to one side of the mixing tank 10, and a hot water supply pipe 20 is connected to the other side. And in the example 2
It is partitioned into three rooms by partition plates 40, 40. Of course, one partition plate 40 may be used to partition the feed pipe 30 side and the hot water supply pipe 20 side. The partition plate 40 is provided with a hot water outlet 41 near its center and an air outlet 42 at the top.
Note that holes 43 are also opened in the lower part of the partition plate 40, but this is because a plurality of holes 43 are simultaneously formed in the periphery of the partition plate 40 when punching and forming the air flow openings 42, and When the plate 40 is installed in the tank 10, any one of the plurality of holes 43 functions as the air circulation hole 42 to facilitate the installation of the partition plate 40.

The hot water feed pipe 30 is provided to penetrate the tank 10, and its hot water feed port 31 is opened downward within the tank 10. By opening the hot water inlet 31 downward, mixing can be performed effectively.

As in the case of the first embodiment shown in FIG. There is. Further, the small air vent 22 is opened at a position slightly lower than the ceiling.

The hot water sent into the tank 10 from the hot water inlet 31 is mixed in each room partitioned by a partition plate 40, and then moves to the next room through the hot water distribution port 41. At this time, since the hot water outlet 41 is located near the center of the tank 10, the hot water portion in the upper part of the tank 10 will remain in the front room. Then, by passing through the partitioned room and the hot water distribution port 41, the sufficiently mixed hot water is sucked into the hot water supply pipe 20 and is supplied for hot water supply.

<Effect> The present invention has the above configuration, and according to the configuration of claim 1, in which the small air vent hole is arranged at a position somewhat lower than the ceiling of the mixing tank, air is always retained in the upper part of the mixing tank. This makes it possible to alleviate and absorb the pressure that occurs when the hot water supply door is suddenly closed, thereby preventing abnormal noises from occurring. Of course, since all the necessary means are constructed inside the tank, there is no need to provide any special structure outside the tank, which saves space.

Further, according to the second aspect of the present invention, the water supply pipe is penetrated so that the small air vent hole is located at a position slightly lower than the ceiling of the mixing tank, and the lower end of the water supply pipe is opened at the bottom of the mixing tank.
This prevents direct inhalation of hot water from the upper layer. At the same time, inconveniences such as a large amount of air being exhausted at once through the suction port are also prevented.

On the other hand, the inside of the mixing tank is partitioned into a plurality of rooms between a hot water inlet and a suction port that are arranged in opposite positions, and a hot water flow port is opened near the center of the partition plate, and According to the structure of claim 3, in which the air flow opening is provided in the upper part of the plate, mixing can be performed effectively within the mixing tank, and conversely, the mixing tank itself can be made smaller and more compact. be. According to the fourth aspect of the present invention, in which the hot water inlet is opened downward in the mixing tank, mixing can be performed more effectively and the tank can be made more compact. Similarly, with the structure of claim 5 in which the suction port of the hot water pipe is opened at the lower part of the mixing tank, suction of hot water is prevented, the mixing effect is further enhanced, and the tank can be made more compact. .

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a mixing tank showing a first embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a mixing tank showing a second embodiment, and Fig. 3 is a configuration showing a conventional example. It is a diagram. 10...Mixing tank, 11...Ceiling, 20...Hot water pipe, 21...Suction port, 22...
Small air vent hole, 30...Hot water feed pipe, 31
...Hot water inlet, 40...Partition plate, 41...
Hot water outlet, 42...air outlet.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The mixing tank in a water heater, in which hot water from a heat exchanger is once sent to a mixing tank, and from the mixing tank, the hot water is further supplied to hot water through a hot water supply pipe. ,
The hot water supply pipe penetrates from the ceiling of the mixing tank to the inside and opens a suction port at its lower end, and a small hole for air venting is opened in the side wall of the hot water supply pipe that penetrates the mixing tank at a position slightly lower than the ceiling. A water heater mixing tank that is characterized by: (2) The mixing tank for a water heater according to claim 1, wherein the lower end suction port of the hot water supply pipe is located at the lower part of the mixing tank. (3) The mixing tank in a water heater, in which hot water from a heat exchanger is once sent to a mixing tank, and then further supplied from the mixing tank to hot water through a hot water supply pipe,
The inside of the mixing tank is partitioned into a plurality of rooms between a hot water inlet and a suction port that are arranged at opposite positions, and a hot water flow port is opened near the center of the partition plate. A mixing tank for a water heater, which is characterized by having an air flow opening at the top. (4) The mixing tank according to claim 3, wherein the hot water feed pipe penetrates into the mixing tank, and the hot water feed port is opened downward within the mixing tank. (5) The mixing tank for a water heater according to claim 3 or 4, wherein the suction port of the hot water pipe is opened at the lower part of the mixing tank.