JPH0649654Y2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hot water supply device applied to a hot water cleaning device for local cleaning after defecation.

(Prior Art) Conventionally, as this kind of hot water supply device, there are a so-called hot water storage type and an immediate heating type.

However, in the former hot water storage type, as shown in Fig. 3, in the hot water storage tank 4b in which the heater 5b is installed, the hot water of a capacity (for example, 600cc) approximately equivalent to the amount of water used once is kept at a constant temperature. In addition, the hot water storage tank 4b becomes very large, and its mounting location is restricted. In addition, maintaining a large amount of water at a constant temperature is wasteful in terms of power consumption of the heater and is economically disadvantageous.

On the other hand, the latter rapid heating type has an advantage that a hot water storage tank is not required because the tap water flowing through the predetermined water passage 51 is heated by the heater 5c as shown in FIG. However, in this means, even if the heater 5c is heated at the same time as the discharge of water at the start of use, it takes a certain time for the temperature of the heater 5c to rise, so cold water is discharged during the first certain period. However, there is a difficulty in giving the user an unpleasant feeling.

Therefore, the inventor of the present invention, as a means for solving the above-mentioned difficulties of both parties, is as follows.
No.) is considered first.

As shown in FIG. 5, this conventional means uses a relatively small hot water storage tank 4a in which a heater 5a is incorporated, and the water temperature in the hot water storage tank 4a is always maintained at a predetermined constant temperature.
When hot water is used, the water flowing from the water supply pipe 30 into the hot water storage tank 4a is continuously heated to a predetermined temperature and discharged from the discharge pipe 31. According to the means, the hot water storage tank 4a can be downsized, and hot water can be immediately used.

However, in this conventional method, the heater 5a is heated to a considerably high temperature during continuous hot water supply, and after the hot water supply is finished, the heater temperature is lowered so as not to raise the water temperature in the hot water storage tank 4a to a desired set temperature or higher. However, the temperature of the heater 5a does not immediately drop. Therefore, conventionally, the residual heat of the heater causes a phenomenon in which the hot water in the hot water storage tank 4a is overheated to a considerably high temperature, and if this is discharged during the next use, there is a problem that the user is burned.

Therefore, as a measure to solve the difficulties involved in the past,
By branching 30 into two pipes 30a and 30b and arranging the discharge port 32 of one pipe 30b close to the suction port 33 of the drain pipe 31, the tap water is sucked only during a certain period in the initial period of hot water discharge. A means for cooling the high-temperature water by flowing it into the drain pipe 31 side through the port 33 has been adopted. Further, the drain pipe 31 is provided with a single tank 34, and the naturally cooled water in the tank 34 and the high temperature water flowing through the drain pipe 31 are mixed,
A means for further cooling the hot water was also used.

(Problems to be solved by the invention) However, in the conventional means for preventing tap water from flowing into the hot water storage tank 4a from the pipe 30b for a certain period of initial discharge of hot water to prevent discharge of high-temperature water due to residual heat from the heater, Since the specific temperature and amount of the high-temperature water due to the residual heat are not constant, it is very difficult to set the supply time of the tap water from the pipe 30b into the hot water storage tank 4a. Therefore,
There was an excess or deficiency in the supply time and supply amount of the tap water, and the hot water temperature at the initial discharge was extremely unstable.

Further, as an important conventional problem, in the above-mentioned one, when starting hot water use in a state where hot water of a desired temperature is stored in the hot water storage tank 4a, low temperature water is stored in the hot water storage tank 4a. Since the water newly flows in, in order to immediately heat the water to a desired temperature and drain it from the hot water storage tank 4a, it is necessary to sharply increase the heat generation amount of the heater 5a and accelerate the rise of the heat generation temperature. This is because low temperature water in an insufficiently heated state is discharged from the hot water storage tank 4a if the heater 5a rises slowly.

However, when the heating temperature of the heater 5a is raised by increasing the heating speed of the heater 5a quickly, the water heated in the hot water storage tank 4a is heated to a desired temperature or higher, and the hot water is heated to a high temperature of, for example, 45 ° C or higher. Then, the hot water becomes unusable.

Therefore, conventionally, it is also very difficult to set the start-up of the heater 5a, and due to this, the hot water temperature becomes unstable, which causes a greater variation in the temperature, which causes a discomfort to the user. Was there.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to make it possible to supply hot water at a stable temperature.

(Means for solving the problem) The present invention has two or more tanks in the hot water drainage route so that the hot water drained at the initial stage of hot water use is not affected by the residual heat of the heater, and the heater with a rapid temperature rise tends to overheat. By mixing water having a temperature lower than that with the hot water drained in step (1), the hot water temperature is set to a desired appropriate temperature, thereby solving the above conventional problems.

That is, the present invention relates to a hot water drainage pipe connected to the hot water storage tank 4.
At least two mixing tanks A and B are connected and provided in the middle of the paths of 6, 6a and 6b, and the mixing tank A on the front side is provided.
A water supply pipe 1d is connected to the hot water discharged from the hot water storage tank 4 so as to lower the temperature of the hot water, and the latter mixing tank B is connected to the former mixing tank A.
The second drainage pipe 7 communicating with the hot water storage tank 4 is connected to mix the hot water in the hot water storage tank 4 with the hot water discharged from the hot water storage tank B and raise the hot water temperature to a desired temperature. It is a water heater.

In addition, in the present invention, in the above-mentioned configuration, the second drainage pipe 7 supplies the hot water in the hot water storage tank 4 to the latter stage through the same drainage port 20 as the drainage pipe 6 in which the mixing tank A is connected to the hot water storage tank 4. The hot water supply device is configured so that it can flow into the mixing tank B.

(Operation) In the hot water supply apparatus having the above-described configuration, when the heating capacity of the heater 5 is increased at the start of use of the hot water stored in the hot water storage tank 4 to accelerate the rising of the hot water, the hot water in the hot water storage tank 4 is Even if the phenomenon of overheating to a higher temperature than desired occurs,
When the high-temperature hot water flows into the mixing tank A, the temperature can be lowered by mixing with the water separately supplied from the water supply pipe 1d. Therefore, there is no fear that the hot water in the hot water storage tank 4 will be discharged as it is.

Further, the hot water whose temperature has been lowered in the mixing tank A then flows into the mixing tank B in the subsequent stage, whereby the second drain pipe 7
It is possible to set hot water having a desired proper temperature by mixing it with hot water supplied from. By mixing with the hot water again in the latter mixing tank B, it is possible to sufficiently mix the warm water and water, which was insufficient in the former mixing tank A, and to stabilize the hot water temperature.

Further, after the hot water is used once, high-temperature water is generated due to the residual heat of the heater 5. However, such high-temperature water is generated only in the hot water storage tank 4 in which the heater 5 is installed, and the hot water storage tank 4 It does not occur in the mixing tanks A and B connected to the pipe. Therefore, even if the second use is performed immediately after the first use of the hot water, the hot water in the hot water storage tank 4 is not directly discharged to the outside, but the hot water in the mixing tanks B and A is discharged. Therefore, no hot water of high temperature is discharged to the outside. Further, since the high-temperature water in the hot water storage tank 4 is discharged through the mixing tanks A and B, it is of course not discharged outside at a high temperature.

Further, the second drain pipe 7 is provided in the mixing tank B having the latter configuration.
In the means set so that the hot water supplied via the hot water supplied from the hot water tank 4 is supplied from the same drain port 20 as the drain pipe 6 connecting the hot water tank 4 to the hot water tank 4,
The temperature of the hot water flowing into A and B can be set to the same temperature. Although there is a variation in the temperature distribution of the hot water in the hot water storage tank 4, in the case of the above configuration, both mixing tanks
Both A and B can be supplied with the hot water in the hottest region existing in the hot water storage tank 4, and the hot water heating efficiency can be improved.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a water supply pipe connected to a tap water supply source,
An electromagnetic valve 16 is provided at an intermediate position thereof, and three branch pipes 1c, 1d, 1e are branched at the rear stage side of the flow control valve 3 provided in the panel of the controller 2.

Reference numeral 4 denotes a hot water storage tank formed in the shape of a thin tube having a volume of, for example, 180 cc, and the branch pipe 1c on the water supply side is connected to one end side thereof. 5 is a rod-shaped heating heater provided in the other end side of the hot water storage tank 4, and the heater 5 is a water temperature sensor 12 for detecting the temperature of tap water and a hot water temperature sensor for detecting the hot water temperature in the hot water storage tank 4. The heat generation temperature is appropriately controlled by the temperature control circuit 11 in the controller 2 corresponding to each of the detected temperatures 13 and 14.

6,6a and 6b are a series of drainage pipes (first drainage pipes) connected to the end of the hot water storage tank 4 where the heater 5 is provided, and the check valve 8 is provided at the last drainage pipe 6b. Further, a nozzle (not shown) for discharging hot water is attached to the front end side of the rear portion.

A and B are two mixing tanks provided in the middle of the drainage path of the first drainage pipe 6 ... Both of which have a capacity of, for example, 20 to 30 cc and are set to have a larger diameter than the drainage pipe 6. To have. A small-diameter branch pipe 1d for supplying tap water is connected to one of the mixing tanks A on the upstream side. Reference numeral 7 is a second drain pipe whose one end is connected to the same outlet 20 as the first drain pipe 6, and the other end is connected to the mixing tank B in the subsequent stage. The second drain pipe 7 is formed to have the same diameter as the first drain pipe 6 or a diameter smaller than that. Reference numeral 9 denotes a water supply device provided in the water supply side branch pipe 1e for ensuring the flow rate of the water supply side piping path, and the water passing through the water supply device 9 is appropriately drained to the outside through a pipe 10. It

The present embodiment has the above-mentioned structure. Next, its use example and operation will be described.

First, in the hot water supply device, the hot water storage tank 4 is connected via the water supply pipes 1 and 1c.
If the tap water that has flowed in is kept at a desired temperature by heating with a heater, the hot water in the hot water storage tank 4 is immediately discharged to the drain pipes 6, 6a by the water pressure on the water supply pipe 1 side during use. it can.

When the amount of hot water used at one time is, for example, about 500cc, the amount of hot water stored in advance in the small hot water storage tank 4 (about 180cc)
However, since the amount of water is insufficient, it is necessary to continuously discharge the water flowing through the hot water storage tank 4 to the drain pipes 6, 6a ... While heating the water to a predetermined temperature. Further, in such a case, low-temperature tap water flows into the hot water storage tank 4, so that the heat generation temperature of the heater 5 must be rapidly raised in accordance with the temperature detection values of the sensors 12 and 13. Thereby, the tap water newly flowing into the hot water storage tank 4 can be immediately heated, and the tap water can be prevented from being discharged to the outside of the hot water storage tank 4 in an insufficiently heated state.

Here, when the heater 5 is heated to a high temperature to accelerate its rise, the hot water heated by the heater 5 is heated to a temperature higher than a desired temperature, for example, 45 ° C. or higher.

When the hot water of high temperature subsequently flows into the mixing tank A, it is mixed with the tap water flowing into the tank A from the water supply pipe 1d, so that the temperature thereof is lowered to 40 ° C. or lower.
When the hot water set to a low temperature in the tank A flows into the next mixing tank B, it is mixed with the hot water discharged from the hot water storage tank 4 through the second drain pipe 7. As a result, the temperature of the hot water that has fallen below the desired temperature in the tank A rises, is set to a desired temperature state of, for example, 40 ° C., and is then discharged to the drain pipe 6b.

The hot water mixed with the tap water in the mixing tank A in the first stage is also mixed with the hot water in the mixing tank B thereafter, so that the mixing with the tap water is sufficiently performed and the hot water is mixed with the tap water. It will be avoided as much as possible to be discharged to the outside in an insufficiently mixed state. Therefore, the temperature of the hot water discharged from the drainage pipe 6b becomes extremely stable. Even if the amount of heat generated by the heater 5 is increased to accelerate the rise of the heater 5, hot water of an unduly high temperature is not discharged from the drain pipe 6b.

Further, after the use of hot water is finished, the heat generation temperature of the heater 5 is lowered to maintain the hot water in the hot water storage tank 4 at a desired temperature again. At that time, since the heater 5 requires a certain time for the temperature reduction, the heater The residual heat causes the water temperature in the hot water storage tank 4 to rise abnormally to, for example, about 60 ° C. and becomes high temperature water. However, the high temperature water is generated only in the hot water storage tank 4, and the high temperature water caused by the residual heat of the heater is in the mixing tanks A and B connected to the hot water storage tank 4 through the drain pipes 6 and 6a. Does not occur.

Therefore, even if the next second use of hot water is performed immediately thereafter, the hot water remaining in the tanks B and A is sequentially discharged at the initial stage of hot water discharge, so that high-temperature water due to residual heat from the heater is immediately discharged to the drain pipe 6b side. There is no fear of Further, the high temperature water generated by the residual heat of the heater generated in the hot water storage tank 4 is finally discharged through the mixing tanks A and B in the state of being mixed with tap water and hot water, respectively, so that the temperature drop and stabilization are prevented. The abnormally high temperature water is not discharged as it is.

If the second use is not performed immediately after the first use of the hot water, the hot water in both mixing tanks A and B will be naturally cooled. However, in such a case, the heat of the hot water set and maintained at the desired temperature in the hot water storage tank 4 is sequentially transferred to both mixing tanks A and B, so that the inside of the mixing tanks A and B is lowered to an unreasonably low temperature state. There is no such thing. Therefore, it is possible to supply the hot water at a stable temperature regardless of whether the second use of the hot water is immediately after the first use or after a long time has passed.

In the above embodiment, since the second drainage pipe 7 is connected to the same drainage port 20 as the other drainage pipes 6, the temperature of the hot water discharged to the outside of the hot water storage tank 4 through both drainage pipes 6 and 7. Both have the advantage that the maximum temperature can be set and the heating efficiency can be improved. That is, the temperature distribution of the hot water in the hot water storage tank 4 is not strictly uniform, and the water flowing from the water supply branch pipe 1c into the hot water storage tank 4 becomes hotter as it approaches the heater 5. Therefore, for example, as shown in FIG. 2, when the second drain pipe 7 is connected to a position different from the first drain pipe 6, when the hot water of the highest temperature is drained from the first drain pipe 6, Inevitably, the drainage temperature from the second drainage pipe 7 becomes lower than that. In such a case, when the hot water discharged from the second drain pipe 7 is caused to flow into the mixing tank B, it is difficult to efficiently raise the hot water temperature. However, such a difficulty can be appropriately solved by setting the discharge ports of both drainage pipes 6 and 7 at the same position as in the above embodiment. Further, the same effect as this is obtained even when the second drain pipe 7 is formed by branching the first drain pipe 6.

However, the present invention is not necessarily limited to the above, and both drain pipes 6 and 7 may be connected to different positions as shown in FIG. The second drain pipe 7 is generally the first
It is preferable to set the diameter to be smaller than or equal to that of the drainage pipe 6, but the drainage pipe 6 is not limited to this, and its specific pipe diameter or the like does not matter at all.

Further, the present invention is not limited to the specific configurations of the respective parts as in the above embodiments.

In the above embodiment, the case where two mixing tanks A and B are used has been described, but in the present invention, three or more mixing tanks may be provided. The point is that there should be at least two or more. Furthermore, the specific volumes and shapes of the mixing tanks A and B do not matter,
It is not always necessary to form each mixing tank in the same size and shape.

Further, the pipe 1d for supplying water to the mixing tank A at the preceding stage is not limited to the means for branching the water supply pipe 1 connected to the hot water storage tank 4. Mixing tank A using a pipe separate from the water supply pipe 1
You may make tap water flow into. The specific amount of water supplied to the mixing tank A may be set according to various usage conditions, and the specific amount of water supply does not matter.

Further, in the present invention, the specific volume and shape of the hot water storage tank 4, the type of the heater 5, the temperature control means, and the specific connection state of various pipes are not limited to those in the above embodiment. All the specific configurations of these parts can be arbitrarily modified within the scope intended by the present invention.

Besides, the hot water supply device according to the present invention is not limited to the application to the cleaning device, but can be widely applied to various other uses, and its specific use is not limited.

(Effect of the Invention) As described above, the present invention provides two or more mixing tanks in the hot water discharge path from the hot water storage tank, and supplies water to the hot water discharged from the hot water storage tank in the preceding mixing tank. The temperature can be lowered by mixing them, and the hot water in the hot water storage tank can be mixed with the hot water whose temperature has been lowered in the latter mixing tank to raise the temperature to a desired set temperature. Even if the heating temperature of the heater is set high and the temperature of the heater rises at the start of using hot water so that the water supplied to the hot water tank is heated sufficiently, There is no risk that hot water heated to a desired temperature or higher by a high heater will be discharged to the outside as it is. It is appropriate to mix hot water with high-temperature hot water to reduce the temperature and to discharge hot water as it is. To prevent It can be stopped. In particular, in the present invention, since the hot water in the hot water storage tank is mixed again with the hot water whose temperature has been lowered by mixing with water, the insufficient mixed state of water and hot water in the tank at the previous stage is completely completed. This enabled us to eliminate temperature variations.

Therefore, according to the present invention, the start-up of the heater at the start of use of hot water is accelerated, and then the hot water at a stable hot temperature can be continuously supplied, so that the discomfort that is conventionally given to the user can be eliminated as much as possible. Came to have.

Further, according to the present invention, even if high-temperature water is generated in the hot water storage tank due to the residual heat of the heater after one use of the hot water, it is not affected by the residual heat of the heater when the hot water is used. The hot water in the hot water tank is discharged to the outside without any troublesome work such as discharging the hot water in the hot water tank and supplying the tap water into the hot water tank only during a certain period of the initial use of the hot water. Can be appropriately avoided, and there is an excellent effect that problems such as burns caused by discharge of high-temperature water caused by residual heat of the heater can be reliably eliminated.

In this way, the present invention can appropriately solve the problems related to high-speed rise of heating of the heater and generation of high-temperature water caused by residual heat of the heater, respectively, and stabilize the hot-water temperature throughout the use of hot water. In addition, a hot water supply device using a small hot water storage tank, which has many advantages as compared with the conventional hot water storage type and immediate heating type, can be put into practical use, and its practical value is great.

Further, according to the present invention, the means for setting the drainage ports of the drainage pipe and the second drainage pipe that connect the mixing tank and the hot water storage tank on the upstream side to the same position can reduce the influence of variations in the hot water temperature in the hot water storage tank. It is possible to supply hot water in the high temperature region in the hot water storage tank to both the front and rear mixing tanks without receiving it, saving waste of hot water heating and saving energy for hot water heating work in the hot water storage tank. There is a real benefit.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a hot water supply device according to the present invention. FIG. 2 is an explanatory view of main parts showing another embodiment. 3 to 5 are explanatory views showing a conventional example. 1 ... Water supply pipe, 1d ... Water supply pipe, 4 ... Hot water tank, 5 ... Heater, 6 ... Drain pipe, 7 ... Second drain pipe, A, B ... Mixing tank

Claims (2)

[Scope of utility model registration request] 1. A hot water storage tank 4 connected to a water supply pipe 1, and a heater 5 provided in the hot water storage tank 4 for heating water supplied from the water supply pipe 1 into the hot water storage tank 4, respectively. In the hot water supply device provided, at least two or more mixing tanks A and B are connected and provided at midway positions of the hot water drainage pipes 6, 6a and 6b connected to the hot water storage tank 4, and In the mixing tank A on the upstream side, the water supply pipe 1d is provided to mix the water with the hot water discharged from the hot water storage tank 4 to lower the temperature of the hot water.
In addition, in the mixing tank B in the subsequent stage, the hot water discharged from the mixing tank A in the previous stage and flowing into the mixing tank B is mixed with the hot water in the hot water storage tank 4 to set the hot water temperature to a desired temperature. A hot water supply device characterized in that a second drain pipe 7 connected to the hot water storage tank 4 is connected so as to be able to rise to the above. 2. The hot water supply apparatus according to claim 1 of the utility model registration claim, wherein the second drain pipe 7 is the same drain port 20 as the drain pipe 6 in which the mixing tank A is connected to the hot water storage tank 4. The hot water supply device is characterized in that hot water in the hot water storage tank 4 is set to be able to flow into the mixing tank B in the subsequent stage via the.