JPH0814662A - Instant heating multi-pipe type electrical hot water heater and method of increasing hot water - Google Patents

Abstract

PURPOSE:To enable hot water to be optionally taken out at any time by a method wherein an inner part of a heating tank is divided into a right segment and a left segment by a partition plate, one segment is applied as a heating part having a heater and a temperature sensitive opening or closing valve stored therein and a hog water guiding pipe connected thereto, and the other segment is applied as a hot water storing part having a water guiding pipe and a water supplying pipe connected to a hot water storing tank placed at the lower- most stage, respectively. CONSTITUTION:In the case that hot water stored in a heating part 9a of a heating tank 9 is sufficiently high, an opening or closing valve 11 is kept closed, so that water advanced from a water supplying pipe 13 into a hot water storing part 9b passes through a water feeding passage 36, advances from a lower part within the heating part 9a so as to push out the hot water within the heating part 9a into a hot water guiding pipe 10 through the opening or closing valve 11 and further into a hot water feeding plug 16 through a hot water feeding pipe 15. Water advanced from the water feeding pipe 13 has a certain difference in density in respect to either hot water within the hot water storing part 9b or hot water within the heating part 9a, so that they may not be mixed from each other, but kept at their separated states. As described above, in the case that the hot water is stored from above the hot water storing tanks 83 to 81 and the hot water is taken out, the hot water is taken out from above, so that it is always possible to an instant hot water feeding operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapid heating multitubular electric water heater and a method for increasing the amount thereof. More specifically, the present invention relates to an electric water heater widely used for homes and businesses and an increasing method for increasing the capacity thereof.

[0002]

2. Description of the Related Art A conventional electric water heater is provided with a heater at a lower portion of a hot water storage tank, a water supply pipe is connected below the hot water storage tank to supply water, and a hot water supply pipe is connected above the hot water storage tank. It is configured to extract boiling water.

[0003]

However, in the above-mentioned conventional electric water heater, since the entire water in the hot water storage tank is always heated by the heater, the heating time until it becomes hot water is long, and once the hot water is used up There was a problem that it took a long time to boil and extract. From a user's standpoint, needless to say, it is convenient and convenient if it has an immediate heating function for extracting hot water in a short time even after hot water is exhausted. However, the electric water heaters currently on the market have almost no immediate heating function. In addition, the conventional electric water heater uses a cylindrical tank that is a pressure container to store hot water, but since the diameter of each of these tanks increases as the capacity increases, there is a problem that the installation location is restricted.

Therefore, an object of the present invention is to provide an electric water heater which can take out hot water at any time, can take out hot water in a short time even after the hot water has run out, and is not restricted in the place of installation. Another object of the present invention is to provide a method for increasing the capacity of the electric water heater after installation.

[0005]

DISCLOSURE OF THE INVENTION The present invention is directed to a horizontally long heating tank having a built-in heater, a plurality of hot water storage tanks arranged vertically in a space above the heating tank, and the heating tank. A molten metal pipe connecting between the uppermost part of the tank and the upper part of the uppermost hot water storage tank, and a valve opened when the temperature of the molten metal in the heating tank, which is interposed in the molten metal pipe, reaches a predetermined temperature. However, with a temperature sensing on-off valve that closes below a predetermined temperature,
A hot water supply pipe connected to the hot water supply port formed in the upper part of the uppermost hot water storage tank, a water supply pipe connected to the water supply port formed in the lower part of the heating tank, and a communication pipe connecting between the hot water storage tanks. , A bottom water storage tank and a water tank connecting between the heating tanks. In the present invention, the inside of the heating tank is divided into left and right by a partition plate, one is a heating unit having a built-in heater and a temperature sensing on-off valve and connected to a hot water pipe, and the other is connected to the bottommost hot water storage tank. It is a hot water storage unit that connects the water conduit and the water supply pipe,
It is preferable that the partition plate has a water supply passage that allows water to be supplied from the hot water storage unit to the heating unit. Further, it is also preferable that the heating tank does not have a partition plate, the heater and the temperature sensing on-off valve are built in an integrated tank, and the hot water pipe, the water pipe and the water supply pipe are connected. Further, in the present invention, it is more preferable that the partition plate is thermally insulated.
It is also preferable that either one or both of the molten metal pipe and the water conductive pipe have a heat insulating structure. In the present invention, the temperature sensing on-off valve may be attached to the open end of the molten metal pipe in the heating tank, or may be attached in the middle of the molten metal pipe. Further, a temperature sensing on-off valve may be attached to the uppermost portion of the heating tank, and a molten metal pipe may be connected to the uppermost portion of the heating tank. In any case, it suffices that the hot water in the heating tank reaches a predetermined temperature, the open / close valve is opened, and the hot water in the heating tank passes through the inside of the pipe guiding pipe and can be sent to the uppermost hot water storage tank. The temperature sensing on-off valve according to the present invention means an on-off valve that opens when the temperature in the heating tank reaches a predetermined temperature (for example, 90 ° C.) and closes when the temperature is below the predetermined temperature. The method for increasing the volume of the present invention is the rapid-heat multi-tube electric water heater according to claim 1, wherein one or more hot water storage tanks are additionally installed in the space above the uppermost hot water storage tank, and Separate the upper end from the existing uppermost hot water storage tank, extend it to the upper part of the uppermost hot water storage tank of the added hot water storage tank, and connect it, and between the expanded hot water storage tanks and the expanded lowermost hot water storage tank It is characterized in that a new communication pipe is connected between the water supply tank and the existing uppermost-stage hot water storage tank. Also,
It is also preferable to replace the existing hot water storage tank with a larger capacity one instead of or in addition to the above-mentioned increasing method.

[0006]

In the present invention, when water is boiled into hot water by the heater in the heating tank, the open / close valve is opened and the hot water is sent to the uppermost hot water storage tank through the hot water pipe and stored therein. When this operation is repeated, hot water is sequentially stored from the upper part of the plurality of hot water storage tanks. Even if hot water and water are present in the hot water storage tank at the same time, they are separated from each other by the specific gravity difference (density difference) of the hot water and water, and the hot water is always located above, so when you open the hot water tap, Only hot water can be extracted. For this reason, the present invention has the advantage that hot water can be taken out at any time, the boiling time in the hot water is short, and hot water can be supplied in a short time. Further, in the present invention, since a plurality of horizontally long hot water storage tanks are juxtaposed in the upper and lower stages, the thickness of the electric water heater as a whole is thin, there are few restrictions on the installation location, and it is possible to install in a narrow place. Occurs. According to the amount increasing method of the present invention, when it is desired to increase the amount of hot water after it has been installed once, a new hot water storage tank is installed above the existing hot water storage tank, and a new conduit pipe or communication pipe is installed. Since it is sufficient, the amount can be increased with simple construction. Further, the amount can be easily increased even if the existing hot water storage tank is changed to a large one instead of the amount increasing method of the present invention.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. (Embodiment of the first invention [Invention of Claim 2]) FIG. 1 is a sectional view of an embodiment of the first invention, and FIGS. In FIG. 1, 9 is a heating tank,
~ 83 is a hot water storage tank. Both the heating tank 9 and the hot water storage tanks 81 to 83 are horizontally long cylindrical pressure vessels, and the heating tank 9 is installed at the lowermost stage, and the hot water storage tanks 81 to 83 are juxtaposed above and below it. are doing. Hot water storage tank 81 ~
83 is three in the illustrated example, but may be two or less, or four or more. The heating tank 9 and the hot water storage tanks 81 to 83 are covered with the heat insulating material 2 and housed in the outer plate 3.

The heating tank 9 is divided into left and right by a partition plate 35 at a substantially middle portion in the longitudinal direction (that is, the horizontal direction in the drawing), and the left side is a heating section 9a and the right side is a hot water storage section 9b. In addition,
The heating unit 9a and the hot water storage unit 9b may be laterally opposite. Further, not only the division in the longitudinal direction but also the method of dividing in the vertical direction may be used. In any case, it suffices if the heating tank 9 can be divided into the heating portion 9a and the hot water storage portion 9b. At that time, the position of the heating portion 9a is preferably provided at the same horizontal position as or below the hot water storage portion 9b. A water supply passage 36 is formed below the partition plate 35, and the hot water storage portion 9b is formed.
Water can be supplied from the heating unit 9a to the heating unit 9a. This water passage 36 may be formed by bending the tank wall surface below the partition plate 35 outward, or may be connected by a pipe 36a as shown in FIG. 10 (a). Hole 36 as shown
The b may be formed on the partition plate 35. In short, it suffices if water can be sent from the hot water storage section 9b to the heating section 9a.

A water supply pipe 13 is connected to a water supply port 17 formed at the bottom of the hot water storage portion 9b of the heating tank 9, and the water supply pipe 13 is connected to a water supply pipe to supply water to the water supply pipe 13 from the water pressure of the water supply pipe. Is also equipped with a pressure reducing valve 14 to reduce the pressure and supply water.
A rectifier 12 is arranged immediately above the opening in the hot water storage portion 9b. A heater 5, which is a main heat source, is provided in the heating unit 9a, and a molten metal pipe 10 is attached to the upper surface of the heating unit 9a. The lower end of the molten metal pipe 10 projects into the heating part 9a, and a temperature sensing on-off valve 11 (hereinafter referred to as the on-off valve 11) is interposed in the opening at the lower end. The on-off valve 11 may be provided in the middle of the molten metal pipe 10 (however, it is preferable to be close to the heating part 9a), and the on-off valve 11 is attached to the uppermost part of the heating part 9a.
The molten metal pipe 10 may be connected to the uppermost part of the heating unit 9a. In any case, the hot water in the heating unit 9a reaches a predetermined temperature, the open / close valve 11 senses a high temperature and opens, and the hot water in the heating unit 9a passes through the inside of the pipe 10 and reaches the top of the hot water storage tank 83 at the uppermost stage. It should be possible to send hot water.
The open / close valve 11 is an open / close valve that opens when the temperature of the hot water in the heating unit 9a reaches, for example, 90 ° C., and closes at a temperature below that. Although not shown, an air vent hole is formed in the mounting flange of the opening / closing valve 11 or in the side wall of the pipe 10 slightly above so that the air in the heating portion 9a existing before the initial water supply is drained at the time of water supply. Further, it is preferable that the air dissolved in the water separated from the water during heating is removed to prevent emptying in the heating section 9a, and that the hot water can be heated in a sufficient amount.

A hot water supply pipe 23 is connected to a hot water supply port 23 formed in an upper part of the hot water storage tank 83 at the uppermost stage, and the hot water supply pipe 15 has a hot water supply tap.
16 are interposed. An upper end of a hot water pipe 10 extending upward from the heating tank 9 is connected to a hot water pipe 15, and the hot water pipe
It is connected to the hot water storage tank 83 via 15. This hot water pipe 10 is a tank for storing hot water boiled in the heating section 9a.
Since it is for feeding to the upper part in 83, it may be substantially connected to the hot water supply port 23 of the hot water storage tank 83. In addition to the case of using the hot water supply pipe 15 as described above, as shown in FIG. The guiding pipe 10 may be directly connected to the hot water storage tank 83.
A relief valve 38 is attached to the upper end of the hot water supply pipe 15 or the hot water pipe 10. The relief valve 38 is a pressure control valve for maintaining the tank internal pressure at a predetermined value or less, for example, 1 kg / cm ² or less.

Between the hot water storage tanks 81 to 83, that is, between the hot water storage tank 83 and the hot water storage tank 82, and the hot water storage tank 82.
A communication pipe 37 connects between the hot water storage tank 81 and the hot water storage tank 81. Further, a water conduit 39 is connected between the lowermost hot water storage tank 81 and the hot water storage portion 9b of the heating tank 9. Rectifiers 12 are installed near the upper ends of the communication pipes 37 and the water conduits 39, respectively.

Next, the functions of hot water storage and hot water supply in the electric water heater will be described. FIG. 2A shows each tank 9,
8 shows a state of supplying water into 81 to 83, and cold water is supplied from the water supply pipe 13 as shown by a dotted arrow, and from the lower portion of the hot water storage portion 9b of the lower heating tank 9 to the upper hot water storage tank 81. Fill tanks 82 and 83 in order. In addition, the internal air is sequentially pushed upward so as to be pushed out by the incoming water, passes through the hot water storage tank 83 at the uppermost portion, and passes through the hot water supply pipe 15 to the hot water tap 16. On the other hand, water is supplied to the heating section 9a of the heating tank 9 from the water supply passage 36. The air in the heating part 9a enters the hot water guide pipe 10 through the mounting flange of the on-off valve 11 or the air vent hole on the side wall of the hot water guide pipe 10 slightly above, and passes through the hot water guide pipe 10 to supply hot water from the hot water supply pipe 15. It is pushed out to the stopper 16 and discharged to the outside. In this way, each tank 9, 81 to 83 and the molten metal pipe 1
0, the communication pipe 37, and the water pipe 39 are all filled with water.

When using this electric water heater, the heater 5 is energized after it is filled with water. At this time, since the temperature of the water W in the heating unit 9a is low, the on-off valve 11 is closed by sensing the low temperature, and the water W in the heating unit 9a is almost immobile. Therefore, most of the heat of the heater 5 is used to heat the water W and is efficiently boiled into hot water.
When the water W in the heating unit 9a becomes hot water HW having a predetermined temperature (for example, 90 ° C.), the on-off valve 11 senses the high temperature and opens, so that the specific gravity difference (density difference) between water and hot water causes Hot water rises in the hot water pipe 10. Of course, since this boiling water HW was boiled in a nearly trapped state, it does not mix with the low temperature water and is a uniform temperature HW.

FIG. 2B shows a state in which the hot water HW sent upward through the molten metal pipe 10 is stored in the upper part of the uppermost hot water storage tank 83. That is, when the hot water HW in the heating section 9a of the heating tank 9 is sent to the upper part of the uppermost hot water storage tank 83 through the inside of the molten metal guiding tube 10, the water W in the hot water storage section 9b.
Passes through the water supply passage 36 and enters the heating portion 9a from below. In the hot water storage section 9b, the water W in the lowermost hot water storage tank 81 is a water conduit.
After passing through 39, the water in the hot water storage tank 82 is linked to the bottom hot water storage tank 81, and the water in the top hot water storage tank 83 is linked to the hot water storage tank 82 via the communication pipe 37. And enter. When the heating section 9a is filled with water W, the on-off valve 11 feels a low temperature and closes, so that the heating section 9a is almost sealed again and heated by the heater 5. After that, when the above heating and hot water feeding are repeated, the hot water HW can be intermittently stored in the hot water storage tanks 83 to 81 from above. This state is shown in FIG. Reference numerals a, b, c and d are hot water HW stored in order. Eventually, hot water HW is intermittently stored in the hot water storage tanks 83 to 81 from above, and the hot water storage tanks 83 to 81 are stored.
Hot water HW is stored in all of the hot water storage section 9b.

FIG. 3 (D) is an explanatory view of the hot water supply action.
When 16 is opened and hot water is taken out, the hot water is taken out from the upper part of the hot water storage tank 83, and the water W is supplied from the water supply pipe 13 below the hot water storage part 9b of the heating tank 9. At this time, if hot water is also stored in the hot water storage portion 9b, the water W pushes up the hot water in the hot water storage portion 9b, and the hot water in the hot water storage portion 9b pushes the hot water in the hot water storage tank 81 through the water conduit 39. Hot water storage tank 81
The hot water HW therein pushes up the hot water in the hot water storage tank 82 through the communication pipe 37, and the hot water HW in the hot water storage tank 83 pushes out to the hot water tap 16 through the hot water supply pipe 15 in a linked manner. On the other hand, when the hot water in the heating portion 9a of the heating tank 9 is sufficiently hot, the opening / closing valve 11
Is closed, the water W that has entered the hot water storage portion 9b from the water supply pipe 13 enters the lower portion of the heating portion 9a through the water supply passage 36,
Hot water in the heating unit 9a is pushed out through the open / close valve 11 into the hot water pipe 10 and then through the hot water supply pipe 15 to the hot water tap 16. The heating unit
When the inside of 9a is filled with water W, the on-off valve 11 senses the low temperature and closes, so this action is stopped and only the above-mentioned action is continued. In addition, the water W entering from the water supply pipe 13 is
Since there is a density difference (specific gravity difference) between the hot water in 9b or the hot water in the heating section 9a, they are kept in a separated state without being mixed with each other. As mentioned above, the hot water HW is the hot water storage tank 83 ~
The hot water is stored from above 81 and is taken out from above when the hot water HW is taken out, so that hot water can always be supplied instantaneously, and even if the hot water is exhausted, it can be heated with only a small amount of water W in the heating section 9a.
Since HW can be extracted, it has an advantage that hot water can be supplied in an extremely short time.

In the present embodiment, the hot water stored in the hot water HW is 4
Since the tanks are divided into the book tanks 9 and 81 to 83, the diameter of each tank is small, and since they are arranged vertically, there is an advantage that the installation space is small. As described above, by freely selecting the number, diameter, and length of the hot water storage tanks and changing the installation area of the electric water heater, the restrictions on the installation location can be greatly flexible.

In the above electric water heater, the hot water pipe 10 may pass through the outside of the hot water storage tanks 81 to 83 or may pass through the inside thereof, and anyway, hot water is sent to the upper part of the uppermost hot water storage tank 83. I wish I could send it. Therefore, as shown in FIG. 4, the pipe 10 may be passed through the communication pipe 37 that connects the hot water storage tanks 81 and 82 and the hot water storage tanks 82 and 83. In this case, the rectifier 12 may be attached by penetrating the molten metal pipe 10. Further, as shown in FIG. 5, the guide pipe 10 may be attached by penetrating the side walls of the hot water storage tanks 81 to 83, and in this case, the communication pipe 37 is connected to the guide pipe 37.
It will be installed in another place. In the embodiments of FIGS. 4 to 5, the rest of the configuration is the same as that of the embodiment of FIG. 1 except for the installation location of the hot water pipe 10. Therefore, hot water can be stored and hot water can be supplied in a short time. Since the thickness of the container is also thin, there is an advantage that the installation place is not restricted.

(Embodiment of Second Invention [Invention of Claim 3])
FIG. 6 is a sectional view of an embodiment of the second invention, and FIGS. 7 to 8 are sectional views of other embodiments. In each of the embodiments of the second invention, the heating tank 9 is not divided by the partition plate 35, and normally a tank smaller than the hot water storage tanks 81 to 83 is used in order to shorten the boiling time. The heating tank 9 and the water pipe are connected by the water supply pipe 13, while the heating tank 9 and the lowermost hot water storage tank 81 are connected by the water conduit 7. Therefore, when the hot water HW boiled in the heating tank 9 is sent to the uppermost hot water storage tank 83, the water in the lowermost hot water storage tank 81 passes through the water conduit 7 into the heating tank 9. The water W is sent to the hot water storage tank 82 through the communication pipe 37 into the hot water storage tank 81, and the water W in the hot water storage tank 83 is sequentially sent to the hot water storage tank 82.

Also in the second invention, the pipe 10 may pass through the hot water storage tanks 81 to 83 or through the hot water storage tanks 81 to 83. Anyway, the hot water is placed on the uppermost hot water storage tank 83. I wish I could send it to you. Therefore, as shown in FIG. 7, the pipe 10 may be passed through the communication pipe 37 that connects the hot water storage tanks 81 and 82 and the hot water storage tanks 82 and 83. In this case, the rectifier
12 may be attached by penetrating the pipe 10. Also, FIG.
As shown in FIG. 3, the molten metal guiding tank 10 may be attached by penetrating the side walls of the hot water storage tanks 81 to 83. In this case, the communication pipe 37 is provided at a place different from the molten metal guiding pipe 10.

Also in the embodiments of FIGS. 6 to 8, the remaining construction is the same as that of FIG. 1 except that the heating tank 9 is of an integral type.
Since it is the same as the embodiment of, the hot water can be stored and supplied in a short time, the thickness of the electric water heater can be reduced, and the installation area of the electric water heater can be variously changed.
The advantage that the installation place is not restricted can be exhibited.

(Other Embodiments of First and Second Inventions) In each embodiment of the present invention, the hot water storage tanks 81 to 83 are preferably inclined as shown in FIG. In other words, when hot water is stored,
By setting the hot water inflow side to be high and the water outflow side to be low, the hot water can be taken out without leaving it in the hot water storage tanks 81 to 83 when hot water is supplied.
This is because when the water in 83 is sent to the heating tank 9, the water can be taken in without leaving. In the case of tilting in this way, an angle of about 2 degrees is sufficient.

The partition plate 35 in the first aspect of the invention and the molten metal pipe penetrating the hot water storage tanks 81 to 83 in the first and second aspects of the invention.
10. It is preferable that the water pipe 7 passing through the heating tank 9 has a heat insulating structure. To create a heat insulating structure, a material with poor heat conductivity may be attached to one or both sides of the partition plate 35, the hot water pipe 10 and the water pipe 7, or a material with poor heat conductivity may be sandwiched between metal plates, A partition plate 35 or conduit tube made of a material with poor conductivity.
10. There are methods such as producing the water conduit 7, and examples of materials having poor thermal conductivity include urethane, ceramics, silicon, and the like, and there is also a heat insulating structure in which an air layer is interposed. In the case of heat insulation by the above method, the heat of the hot water boiled in the heating unit 9a is less likely to be taken by the water in the hot water storage unit 9b, and the heat of the hot water in the pipe 10 is the surrounding water. Since it is not taken away by the water, there is an advantage that it can be boiled into hot water efficiently and stored.

Next, the amount increasing method of the present invention will be described. After installing the electric water heater of the present invention, it may be desired to increase its hot water storage capacity. For example, even in household electric water heaters, the amount of hot water used may increase due to an increase in the number of families, the growth of children, changes in life rhythm, etc. In that case, the hot water storage capacity of 370 liters (for a family of four) is insufficient, There are cases where you want to change to a liter or 450 liter one. If the conventional hot water storage tank is a single electric water heater, the entire electric water heater must be replaced. However, doing so is uneconomical, and sometimes it cannot be installed if it is changed to a large capacity hot water storage tank. However, the increase method of the present invention has the advantages that the construction is simple and the installation location is not restricted.

Hereinafter, description will be given with reference to FIG. Figure 12 (A)
Is an example in which a new hot water storage tank is provided in the space above the existing hot water storage tank. That is, a new hot water storage tank 84 is installed above the existing uppermost hot water storage tank 83, and
Separate the upper end of 10 from the existing uppermost hot water storage tank 83,
It is extended and connected to the upper part of the expanded hot water storage tank 84, and the lower part of the expanded hot water storage tank 84 and the existing hot water storage tank 83
A new communication pipe 37 is connected to the upper part of the. The number of hot water storage tanks to be added is not limited to one and may be two or more. In this case, it is necessary to connect the additional hot water storage tanks with each other by a new communication pipe 37. According to the above amount increasing method, the hot water storage tank is increased, the heater 5 is replaced with a large capacity one, and the hot water pipe 10 and the communication pipe 37
Since it is only necessary to perform the plumbing work, the construction is easy, and the installation space, especially the floor area, does not increase, so there is an advantage that it is hard to be regulated by the place. Further, the increasing amount method of the present invention may be used in place of or in combination with the above method, and the existing hot water storage tank may be replaced with a large one. Therefore, as shown in FIG. 12B, the existing hot water storage tank 83 may be replaced with a large hot water storage tank 83A, and in addition to that, an additional hot water storage tank 84 may be added. is there.

[0025]

According to the present invention, it is possible to provide a thin electric water heater that can supply hot water immediately and can supply hot water in a short time even after running out of water, and that the installation place is not so limited. Also, the hot water storage capacity can be increased with simple construction.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an electric water heater according to an embodiment of the first invention.

FIG. 2 is an explanatory view of hot water storage / hot water supply operation of the electric water heater of FIG.

3 is an explanatory view of hot water storage / hot water supply operation of the electric water heater of FIG. 1. FIG.

FIG. 4 is a vertical sectional view of an electric water heater according to another embodiment of the first invention.

FIG. 5 is a vertical sectional view of an electric water heater according to still another embodiment of the first invention.

FIG. 6 is a vertical sectional view of an electric water heater according to an embodiment of the second invention.

FIG. 7 is a vertical sectional view of an electric water heater according to another embodiment of the second invention.

FIG. 8 is a vertical sectional view of an electric water heater according to still another embodiment of the second invention.

FIG. 9 is an explanatory view showing another connection example of the molten metal pipe 10.

FIG. 10 is an explanatory diagram of another example of the water supply channel.

FIG. 11 is an explanatory diagram of an arrangement example of hot water storage tanks 81 to 83.

FIG. 12 is an explanatory diagram of the amount increasing method of the present invention.

[Explanation of symbols]

5 Heater 9 Heating tank 10
Hot water pipe 11 Temperature sensing on-off valve 12 Rectifier 13
Water supply pipe 15 Hot water supply pipe 35 Partition plate 36
Water channel 37 Communication pipe 39 Water conduit 81
~ 83 Hot water storage tank

Claims (7)

[Claims] 1. A horizontally long heating tank having a built-in heater, a plurality of hot water storage tanks arranged side by side in a vertical direction in a space above the heating tank, and an uppermost portion and an uppermost portion of the heating tank. A hot water pipe connecting between the upper part of the hot water storage tank and the hot water pipe, which opens when the temperature of the hot water in the heating tank reaches a predetermined temperature and closes when the hot water temperature is lower than the predetermined temperature. Temperature sensing on-off valve, hot water supply pipe connected to the hot water supply port formed at the top of the hot water storage tank, water supply pipe connected to the water supply port formed at the bottom of the heating tank, and each hot water storage tank A quick-heat multi-tube electric water heater comprising a communication pipe connecting between the two and a water conduit pipe connecting between the lowermost hot water storage tank and the heating tank. 2. The inside of the heating tank is divided into left and right sides by a partition plate, one is a heating part having a built-in heater and a temperature sensing on-off valve and connected to a hot water pipe, and the other is a lowermost hot water storage tank. 2. A hot water storage unit in which a water conduit and a water supply pipe to be connected are connected, and a water supply passage that allows water to be sent from the hot water storage unit to the heating unit is formed below the partition plate. Immediate heat multi-tube electric water heater. 3. The heating tank is not provided with a partition plate, a heater and a temperature sensing on-off valve are built in an integrated tank, and a hot water pipe, a water pipe and a water supply pipe are connected. The quick-heat multitubular electric water heater according to claim 1. 4. The quick-heat multi-tube electric water heater according to claim 2, wherein the partition plate is thermally insulated. 5. Either one of the water guiding pipe and the water guiding pipe,
Alternatively, both are insulated.
Alternatively, the rapid-heat multitubular electric water heater described in 3. 6. The quick-heat multi-tube electric water heater according to claim 1, wherein one or more hot water storage tanks are additionally installed in the space above the uppermost hot water storage tank, and the upper end of the hot water pipe is ,
Separated from the existing uppermost hot water storage tank, extended and connected to the upper part of the uppermost hot water storage tank of the added hot water storage tank, and between the expanded hot water storage tanks and the expanded lowermost hot water storage tank A method for increasing the volume of a rapid-heat multi-tube electric water heater, characterized by connecting a new communication pipe to the existing uppermost hot water storage tank. 7. A method for increasing the volume of an immediate heating multitubular electric water heater, characterized in that an existing hot water storage tank is replaced with a larger capacity tank instead of or in addition to the quantity increasing method according to claim 6.