JPS5938549A - Hot-water boiler - Google Patents

Abstract

PURPOSE:To prevent a temperature of hot water at the time of feed of the hot water from lowering suddenly by feeding low temperature water available at the time of building-up of a heat source into the lower part of a hot water tank, by a method wherein a duct is ramified from a downstream heat source part and connected with the lower part of the hot water tank through an orifice part. CONSTITUTION:As for a hot water tank 3, the lower part of the same is provided with a feed water pipe, a taking-in pipe 6 of water is remaified into connecting pipes 6a and 6b from the lower part of the other side of the same, each of which is provided with circulating pumps 4a and 4b, connecting pipes 7a and 7b, heat source parts 5a and 5b and connecting pipes 8a and 8b in this order respectively and collected at a connecting pipe 8c. One side of the connecting pipe 8c is ramified to a feed hot water pipe 8 through a flow control valve 15 and the other side is ramified to a feed hot water pipe 17 through an orifice part 16. A duct between an orifice plate 22 and a diskform movable plate 20 is blocked through contraction of a temperature sensing part 18 of the flow control valve 15 by sensing low temperature water by the sensing part 18 at a transitional building-up period of the heat source parts 5a and 5b at the initial stage of additional heating. With this construction, the low temperature water is fed to the lower part, which is a part of a low tempeature sphere of the hot water tank 3, through the orifice part 16 and the feed hot water pipe 17. A temperature distribution, therefore, of hot water within the hot water tank 3 is not spoiled.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water boiler that stratifies high-temperature hot water from the upper part of a hot water storage tank.
This relates to a hot water boiler structure in which low-temperature hot water is spouted from the bottom at startup.

Conventional configuration and problems thereof A conventional hot water boiler is configured as shown in FIG. That is, a hot water storage tank 3 having a hot water outlet pipe 1 in the upper part and a water supply pipe 2 in the lower part, a circulation pump 4 and a heat source part 5 are successively connected from the lower part of the hot water storage tank 3 at an angle of 7°8. 8 is connected to the road part of the hot water storage tank 3 to form a heating circuit.

In this structure, the high temperature hot water obtained from the heat source section 5 is transferred to the hot water storage tank 3.
Since hot water is stored from the roadside of the hot water storage tank 3 and then turned over, when the water in the hot water storage tank 3 is raised to a high temperature, the conditions for spouting from the connecting pipe 8 to the hot water storage tank 3 must be carefully adjusted. The disadvantage is that the temperature distribution above and below is uneven. for example,
When the flow rate of the circulating flow rate is high, the diffusion within the hot water storage tank 3 becomes more intense and becomes more non-uniform. This is particularly noticeable when the circulation flow rate is large. The performance in this case is shown in FIG.

Furthermore, when dispensing hot water after a while after boiling, the temporary
5℃), since the instantaneous water heater is used as the heat source, low-temperature water will be pumped into the steady state (Figure 3 shows a typical instantaneous water heater). There is a drawback that the temperature of the hot water in the hot water storage tank 3 decreases compared to the temperature when it is boiled, and the temperature of the hot water that comes out of the hot water tank 3 drops suddenly in some areas. An example of this performance is shown in FIG.

Furthermore, since the heat source and the hot water storage tank are separated, when considering freezing prevention during the coldest season, the heating circuit is more likely to freeze than the inside of the hot water storage tank. Therefore, protective measures can be taken, such as installing large-capacity electric heaters at important points in the heat source and turning them on and off, or turning the heating circuit on and off, but in either case However, regarding the hot water temperature distribution in the hot water storage tank, if the heating circuit is one-way, low-temperature water will intermittently enter the hot water storage tank and the hot water temperature will drop, as described above. At the same time, the temperature distribution becomes larger.

If hot water is dispensed under this condition, there is a drawback that hot water with uneven temperature will be dispensed.

These are problems specific to the method of temperature stratifying hot water from the top.

OBJECTS OF THE INVENTION The present invention obviates these drawbacks, and in particular:
The purpose is to minimize the distribution of hot water temperature during boiling when the circulating flow rate is large, to prevent the temperature of the hot water from rapidly dropping and freezing when hot water is discharged, and to minimize the occurrence of uneven hot water discharge. That is.

Structure of the Invention In order to achieve this object, the present invention provides a hot water boiler in which the heat source and the hot water storage tank are separated and forced convection is carried out using a circulation pump, which is equipped with a water supply pipe at the lower part and a mixing chamber by protruding the upper center. A first flow path having a circulation pump, a heat source, and a flow rate control valve is drawn out from the bottom of the formed hot water storage tank, and this first flow path is connected to a flow rate attenuator provided in the mixing chamber. The two channels are separated and the second channel is connected to the lower part of the hot water storage tank via an orifice.

This makes it possible to control the flow of high-temperature hot water from the first flow path into the second part of the hot water storage tank and the flow of low-temperature hot water at the time of startup of the heat source into the lower part of the hot water storage tank from the second flow path, and to control the flow velocity damping body. Conditions are set so that the force of the circulation pump is attenuated and the flow velocity does not cause convection in the hot water storage tank (for example, dynamic pressure is replaced with static pressure), and the water is uniformly distributed and ejected. This solves the problem of formation of temperature stratification in the upper part of high-temperature hot water with very little temperature distribution, rapid temperature drop at the time of tapping, and non-uniformity of temperature distribution during the cold season.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 6 to 10. In the figures, parts that are the same as those in FIG. 1, which is a conventional example, are given the same numbers.

In the figure, the hot water storage tank 3 is equipped with a water supply pipe 2 at the lower part, and from the other lower part, the water inlet pipe 6 is branched into connection pipes 6a and 6b via a reverse valve 10, and circulation pumps 4a, 4b, Connecting pipes 7a, 7b, heat source section 5a.

5b, connecting pipes 8a and 8b are arranged in this order, and converge in a connecting pipe 8C.

One side of the connecting pipe 8C is branched to the hot water supply pipe 8 via the flow control valve 16, and the other side is branched to the hot water supply pipe 17 via the orifice section 16.

The hot water storage tank 3 has a mixing chamber 14 whose upper end is concentric and the center protrudes, and the hot water tank 3 has a bottomed mixing chamber 14 in which the tip of the hot water supply pipe 8 is passed through the mixing chamber 14 through P1. It is connected to a flow rate attenuator 12 made of a porous material having a large number of small holes 13 in a hollow cylindrical side wall.

Further, a hot water outlet pipe 1 is provided on one side wall of the mixing chamber 14, and a hot water supply pipe 17 is connected to a substantially closed portion of the hot water storage tank 3.

The temperature thermistor 9 is provided on the lower side wall of the hot water storage tank 3. 11a and 11b are respectively provided on the upstream side of the heating circuit with a flow rate adjustment knob.

Further, the flow rate control valve 15 has a temperature sensing section 1 filled with wax.
The disk-shaped j1f moving plate 20 fixed to 8 is positioned close to the orifice plate 22, and the disk-shaped movable plate 20 and the spring It! A spring 19 is disposed between the n constant plate 21 and the tip of a pin 23 projecting telescopically from one end of the temperature sensing portion 18 is brought into contact with a pin fixing plate 24.

Further, the orifice portion 16 has a disk shape (
(not shown).

Next, in the above configuration, the operation will be explained separately for boiling up and tapping.

(1) When the temperature of the water in the hot water storage tank 3 is lower than the set water temperature, the temperature thermistor 9 detects this and the circulation pump 4a is activated.

A signal is sent to 4b to drive it. Circulation pump 4a.

When 4b is driven, the heat sources 6a and sb are ignited by detection by flow rate switches (not shown) provided in the heat sources 5a and 5b, and the water is circulated and heated. After that, when the water temperature in the lower part of the hot water storage tank 3 rises to the set hot water temperature, the temperature thermistor 9 senses this and stops the circulation pumps +a and 4b. Circulation pump 4
a.

When 4b stops, the heat source part sa is detected by the flow rate switch.
, sb extinguishes the fire.

- In this configuration, the flow rate of the circulation pumps 4a, 4b is kept constant, and the combustion amount of the heat source parts 6a, sb is determined by temperature thermistors (not shown) installed in the connecting pipes 8a, Bb, and the flow rate is reduced. The combustion amount is proportionally controlled so that the temperature of the hot water sent to the section 12 remains constant during steady state.

During this boiling process, the flow rate attenuator 12 is
4, and by using porous paulownia wood for the hollow cylindrical side wall with a bottom, the ejection area is increased, and the hot water from the hot water supply pipe 8 is , by uniformly ejecting the vertical jet in the mixing chamber 14 from the entire area of the many small jet holes in the side wall, and by setting the jetting conditions close to static pressure, convection in the hot water storage tank 3 is achieved. Partial stratification of high-temperature water without temperature distribution can be realized. The performance at this time is shown in FIG.

l, 2) When dispensing hot water After the hot water in the hot water storage tank 3 has been boiled to a specified temperature (for example, 80°C), the hot water in the heating circuit, including the hot water in the heat source, is When the outside temperature has dropped and the water temperature has reached the water temperature, open the faucet (not shown) at the tip of the hot water pipe and tap the hot water. Low-temperature water will be pumped through the water supply pipe and the hot water will be pushed up to the top. Hot water at a predetermined temperature is sent out from the pipe.

After that, the temperature thermistor 9 provided on the side wall of the hot water storage tank 3 is
senses it and sends a signal to the circulation pumps 4a, 4b to drive them. When the circulation pumps 4a, 4b are driven, the heat sources a, s
The heat source section 5a is detected by a flow rate switch (not shown) provided in the heat source section 5a.

6b starts to ignite and reheating begins.

At the beginning of this reheating, the low-temperature water during the transient period of rising of the heat sources 6a and 5b is used for the flow rate control valve 16. The temperature sensing part 18 detects low-temperature water and is in a contracted state (FIG. 7), and the expansion force of the spring 19 causes the disc-shaped movable plate 2 to
0, the temperature sensing part 18 is pushed in both directions against the spring fixed plate 21 as shown in FIG. Become. As a result, the low-temperature water is sent through the hot water supply pipe 1 to the lower part of the hot water storage tank 3 which is in the low temperature range.

Therefore, the temperature of the hot water in the hot water storage tank 3 is not lowered, and the hot water temperature distribution is not impaired. After that, when the temperature of the water from the heat source increases, the temperature sensing part 18 expands, and by performing the operation opposite to the above, the state shown in FIG. 8 is reached, and the area of the flow path is expanded. Orifice part 1 of hot water supply pipe 17
6, a constant high temperature hot water flows from the hot water supply pipe 8 to the flow velocity damping body 1? will be sent to. At this time, as described above, the water is dispersed and ejected from the flow rate attenuator 12 at a flow rate close to the static pressure, so that upper temperature stratification of the high temperature hot water is established.

Furthermore, for freezing protection 1 during the severe cold season, the heating circuit including the heat source section is operated on and off to protect against freezing (not shown). Since the configuration is such that only high-temperature hot water is sent to the flow rate attenuator 12 through the supply tank 8, and the rising low-temperature water to low-temperature hot water is sent from the bottom of the hot water storage tank 3, there is no sudden temperature drop in the hot water storage tank 3, and the hot water temperature remains constant. It is possible to prevent freezing while maintaining uniformity of water. An example of the performance at this time is shown in FIG. 1o.

Effect of the invention According to the hot water boiler of the present invention, the following effects can be obtained.

(1) During boiling, in a steady state, a constant temperature of hot water is sent to the flow rate attenuator and the flow rate attenuator is installed in the upper part of the hot water storage tank, resulting in a jetting condition close to static pressure, and convection inside the hot water tank. Since boiling can be prevented and the upper stratification of high-temperature water with extremely small temperature distribution occurs, it is possible to obtain high-temperature water in a short time (quickly obtaining high-temperature water), which improves usability.

(2) By spouting high-temperature hot water from the heat source from the upper part of the hot water tank and low-temperature water at rising temperature from the bottom of the hot water tank, it is possible to prevent freezing in severe cold weather, and to keep the water inside the hot water tank. It is possible to maintain a uniform hot water temperature, and to provide a hot water boiler with a stable hot water temperature without any partial drop in temperature at the mountain highs.

(3) Since the system uses the temperature of the hot water from the heat source to switch up and down, the purpose can be achieved with an inexpensive configuration.

(4) Since the heating circuits are arranged in parallel, complete stoppage of functionality can be avoided even in the unlikely event of a failure.

In addition to its maintenance features, this hot water boiler can be used for household to commercial use.

(6) Hot water with high thermal energy efficiency, with stable hot water temperature ↑F+, hot water discharge (storage type function), and quick release of high-temperature hot water using the upper stratification method (instant type function) We can provide boiler.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of a conventional hot water boiler, Figure 2 is a boiling performance diagram of the same, Figure 3 is a typical start-up performance diagram of a general instantaneous water heater, and Figure 4 is a conventional example of hot water output. Temperature Diagram, Part 6
The figure is a block diagram of a hot water boiler according to an embodiment of the present invention, FIG. 6 is an enlarged cross-sectional view of the same essential parts, FIG. 9 is a cross-sectional view showing the internal structure of the temperature sensitive part when it expands, and FIG. 9 is a sectional view of an embodiment of the present invention.
11: Lifting performance diagram; Figure 10 is the hot water temperature performance diagram. 3...Hot water storage tank, 4a, 4b...Circulation pump, 5a. 5b...Heat source part, 8...Hot water pipe, 12
...Flow velocity damping body, 13... Small jet hole,
14... Mixing chamber, 16... Flow rate control valve, 16... Orifice section, 17... Hot water pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1 Figure 2 Figure 3
l We 1 Hide r11 No. 4v4 ± Port g Seki No. 5aiii I No. 7 Figure No. 8 No. 9 No. 10 No. 10 Time to fall Mr. Commissioner of the Patent Office 1 Display of the case 1982 Patent application No. 150674 Tan 2 Name of the invention Hot water Person who corrects boiler 3 sleeves (Relationship with 'l Patent issue)
Wish Pillar Location 1006 Kadoma, Kadoma City, Osaka Name Name (582) Representative of Matsushita Electric Industrial Co., Ltd.
Toshihiko Yamashita 4 Agent 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 5. Subject of amendment 6. Contents of amendment (1) Attached is the scope of claims in Meiyo 1. Correct as shown below. (2) “Flip method” and “Yuu method” on page 2, line 7
will be corrected. (3) In the 9th line of the 4th Tei, "a hot water storage tank with a protruding top center to form a mixing chamber" is corrected to "a hot water storage tank with a hot water outlet pipe at the top". (4) Correct "1st mixing room" on the 11th line of page 4 to "inside the hot water storage tank." (6) Insert the legal text after "0 shown in Figure 10" on page 1o, line 18 of the same page. ``Although in the above embodiment, the hot water supply pipe and the hot water outlet pipe are arranged concentrically, the present invention is not limited to this configuration, and the hot water supply pipe and the hot water outlet pipe may be separated and placed in the hot water storage tank. I can't say enough good things about it.Also, the protruding mixing chamber mentioned above can be provided as needed, and the upper part of the hot water storage tank can also be used.
2. Claims A water supply pipe is provided at the lower part, a hot water supply pipe is drawn out at the upper part, and a hot water storage tank is provided, and from the lower part of the hot water storage tank, a first flow path having a circulation pump, a heat source section, and a flow rate control valve is provided. The drawer connects the first flow path to a flow velocity attenuator provided in the upper part of the hot water storage tank, and
The first flow path is a hot water boiler connected to the lower part of the hot water storage tank via an orifice.

Claims (1)

[Claims] A hot water storage tank is provided with a water supply pipe at the bottom and a hot water pipe is drawn out from a mixing chamber whose upper center protrudes, and a first flow path having a circulation pump, a heat source, and a flow rate control valve is provided from the bottom of the hot water storage tank. The first flow path is connected to a flow rate attenuator provided in the mixing chamber, and a second flow path is branched from downstream of the heat source of the first flow path, and the second flow path is connected to a flow rate attenuator provided in the mixing chamber. A hot water boiler connected to the bottom of the hot water storage tank.