JPS60149840A - Water heating device - Google Patents

Abstract

PURPOSE:To form the water heating device for enabling a small amount of hot-water supply without generating a chattering phenomenon by a method wherein a buffer by- pass pipe provided with a buffer tank and a constant temperature valve is arranged on a small amount of hot-water supply passage. CONSTITUTION:A heat exchanger 2 formed of a jacket is fixed on the outer periphery of a hot-water storage tank 1. A supply pipe 4 is fixed between a boiler 3 and the upper part of the heat exchanger 2. A return pipe 5 for supplying the whole amount of hot-water is fixed between the heater 3 and the lower part of the heat exchanger 2, also a return pipe 6 for a small amount of hot-water supplying is fixed between the heater 3 and the nearly intermediate location in vertical direction of the heat exchanger 2. The whole amount of hot-water return pipe 5 and the small amount of hot- water return pipe 6 are connected with a three-way valve 14, both return pipes 5, 6 are made to be connected to the heater 3 with a common pipe. In the small amount of hot- water supply passage 7 composed of the supply pipe 4, the heat exchanger 2 and the small amount of hot-water return pipe 6, a buffer by-pass pipe 8 is fixed between the supply pipe 4 and the upper part of the heat exchanger 2. A buffer tank 9 and a constant temperature valve 10 are fixed on the by-pass pipe 8, the constant temperature valve 10 is made to be opened at the slightly lower temperature than the burning stop temperature of a safety device provided in the heater 3.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a water heating device in a solar water heating system, etc.0 [Background Art] A water heating device as shown in Fig. 1 has been conventionally used in a solar water heating system. . In this case, a heat exchanger (2) is installed on the outer periphery of the hot water storage tank fl).
) is connected to the solar heat collector α through the circulation @J\Izu0 port, and the boiler (3) and heat exchanger (2) are connected to the supply pipe 14.
), return pipe for full ring lifting (0), return pipe for small ring lifting (
6), and the return pipe for full ring lifting (5) and the return pipe for small ring lifting (6) are connected by a three-way valve (I→
It is connected with. In this device, water is supplied into the hot water storage tank flll from the water supply port Qlli), and the heat medium heated by solar heat in the solar heat collector (I2) is sent to the heat exchanger (2) by circulation. The water in the hot water storage tank f1) is heated by the heat medium in the heat exchanger (2), and hot water is discharged from the hot water supply port (-).In order to compensate for this lack of heating, the boiler (3) When boiling the entire amount of hot water in the hot water storage tank fll in the boiler (3), the heat medium heated in the boiler (3) is transferred from the supply pipe (4) to the heat exchanger pW. (Supplied into
6), the heat medium is circulated along the route indicated by the arrow a, returning it to the boiler (3), and the entire heat medium in the heat exchanger (2) is used to boil water. In addition, when hot water is suddenly required, only the water in the upper part of the hot water storage tank fl (above the dashed line in Figure 1) is boiled in order to perform rapid heating. By switching the valve θ, the heat medium supplied from the boiler (3) to the upper part of the heat exchanger (2) via the supply pipe (4) is transferred from the approximately middle part of the heat exchanger (2) to the return pipe for small volume shipping. (6), the heat medium is returned to the boiler (3) and heated by the boiler (3) only in the upper part of the heat exchanger (2).
) so that heat is exchanged with the hot water at the top of the chamber. The boiler (3) has a large heating capacity so that it can boil the entire amount of hot water in the hot water storage tank (1). There is no problem when the medium is heat exchanged with the hot water in the hot water storage tank fl over the entire surface of the heat exchanger (2), but when the medium is heated from the boiler (3) to the Ueda of the heat exchanger (2), such as when boiling a small amount, When the supplied heat medium is returned from the middle part of the heat exchanger (2) to the bottom and the bottom (3) through a small-volume seagoing return pipe; 6), the heat medium is returned to the upper part of the heat exchanger 12). The hot water storage tank (1
), the heat medium is returned to the boiler (3) without sufficient heat exchange, and the temperature of the heat medium returned to the boiler (3) gradually increases. . Here, in order to prevent overheating, the boiler (3) detects the temperature of the returning heat medium and maintains the temperature of the heat medium at a predetermined temperature (for example, 8
A safety device is installed to stop combustion when the temperature rises above 3℃), and when the high-temperature heat medium is returned through the return pipe (6) for a small amount of seawater as described above, the boiler (3) will stop combustion. The heating medium is circulated while only the pump remains in operation. When the heat medium is cooled by circulation, combustion in the boiler (3) starts again, and this is reversed, causing the so-called chita ring phenomenon in which the combustion in the boiler (3) is repeatedly turned on and off. It turns out. When the P-Tarringe phenomenon occurs as described above, the life of the boiler (3) is shortened, and the problem arises that noise is generated due to the sound at the time of ignition.

[Purpose of the invention]

The present invention has been made in view of the above points, and an object of the present invention is to provide a water boiling device capable of boiling a small amount of water without causing a flickering phenomenon in the boiler.

[Disclosure of the invention]

However, the water heating device according to the present invention has a hot water storage tank +1
The heat exchanger (2) provided on the outer periphery of the heat exchanger (2)
) Supply pipe connecting upper ttB and boiler (3); 4)
, a full ring lifting return pipe (5) that connects the lower part of the heat exchanger (2) and the boiler (3), and a small pipe that connects the approximately middle section of the heat exchanger (2) and the boiler (3). Return pipe for shipping (6
) and a supply pipe; 4) and a heat exchanger 1! i!
! A buffer bypass pipe (8) is provided in the buffer bypass pipe (8) for small volume offshore transport (7+), which is formed by a small volume marine transport return pipe (6) (9) and a constant temperature valve (lO) that opens at a predetermined temperature in the buffer bypass pipe (8) on the inflow side of the heat medium to the buffer tank (9). The above purpose is achieved by installing a buffer bypass pipe (8) equipped with a buffer tank (9) and a constant temperature valve (10) in the small volume seagoing outlet (7), and the following: The present invention will be explained in detail by way of examples.

Figure 9g2 shows an example of this embodiment.A heat exchanger (2), which is heated by a JIP get, is installed on the outer periphery of the hot water storage tank (fl), and it exchanges heat with the boiler (3). Vessel: 2)
A supply pipe (4) is installed between the upper part of the boiler (3) and the lower part of the heat exchanger (2). Boiler (3) and heat exchanger (2)
A return pipe for small quantity sealifting: 6) is installed between the middle part of the upper and lower passages. They are connected by a three-way valve (14), and both return pipes fil:el are connected to the boiler (3) through a common pipe. And supply pipe: 4
), a heat exchanger (isolate (2), return pipe for small volume sealift: 6), and in the embodiment shown in Fig. 2, a supply pipe: 4) and a heat A buffer bypass pipe (8) is installed between the upper part of the exchanger (2) and the bypass pipe (
8) has a buffer tank formed by a tank with a capacity of 101st place (
9) and a constant temperature valve (10) inside the boiler (3) that is closed when the temperature is lower than this. Of course, there is a solar collector in the heat exchanger (2)! I21 is the first
The connections are the same as in the case shown in the figure, and the heating of the hot water in the hot water storage tank (1) by the solar collector α and the boiling of the entire amount of hot water in the hot water storage tank fil by the boiler (3) are the same as in the case of Fig. 1. It is done in the same way.

When boiling a small amount of hot water in the upper part of the hot water storage tank (1) using the boiler (3), first, as shown in Figure 3 (a), the heating medium heated by the boiler (3) is transferred to the supply pipe. △
, The heat medium is circulated through the heat exchanger (2), and heat is exchanged with the hot water in the upper part of the hot water storage tank (0) only at the upper part of the heat exchanger (2). Boil water. In this case, as in the case shown in Figure 1, heat exchange using the heat medium is carried out only in the narrow area at the top of the hot water storage tank (fl), so the water is returned to the boiler (3) before sufficient heat exchange occurs. As a result, the temperature of the heating medium gradually increases as it circulates. Then, the temperature of the heating medium is adjusted to the constant temperature valve (10
), the constant temperature valve (10) opens and the heat medium flowing through the supply pipe (4) flows into the buffer bypass pipe (8) as shown in Figure 3 (b) and is transferred to the buffer tank (9). After passing through, it is supplied into the heat exchanger (2), and then sent to the return pipe (6) for raising small quantities.
The water is then sent back to the boiler (3). This hearing,
When the heating medium enters the buffer tank (9), the heat of the heating medium flows into the buffer tank (9).
) The heat is radiated and stored in the boiler (3), and some heat is taken away, and the rate of temperature rise of the heating medium is lowered, causing the temperature of the heating medium to drop to the boiler (3).
The time required to raise the temperature until it reaches the set temperature of the safety device can be extended, and the time required to burn the boiler (3) and circulate the heating medium can be extended, and the boiler (3) can be fired many times in a short period of time. This makes it possible to prevent the occurrence of the P-Tarringe phenomenon, which causes combustion and combustion stoppage to be reversed. When the temperature of the circulating heat medium becomes higher than the set temperature of the safety device of the boiler (3), combustion in the boiler (3) is stopped.

Then, the heat medium is circulated by the action of the pump while the boiler (3) is not lit, and the heat medium is exchanged with hot water in the hot water storage tank (1) in the heat exchanger (2). The temperature decreases and the boiler (3) is fired again.

In addition, a latent heat storage material such as paraffin as shown in Fig. 4(a) is placed in the buffer tank (9) and sealed in a container (19) made of heat-resistant plastic such as polyester, as shown in Fig. 4(b).
) By placing the heat medium in the buffer tank (9), the latent heat storage material (1
8), heat can be taken away and stored, and the volume of the buffer tank (9) can be reduced to reduce heat radiation loss.

FIG. 5 shows another embodiment of the present invention, in which the supply pipe (4
)・A buffer bypass pipe ( 8) is attached. This device also achieves the same effect as the one in Figure 2. [Effects of the invention] As mentioned above, the present invention has a supply pipe, a heat exchanger, and a small volume boiling area. A buffer bypass pipe is installed in the small-volume part lifting path formed with the feed pipe, and the buffer bypass pipe is equipped with a buffer tank and a constant temperature valve that opens at a predetermined temperature, so it can be used for boiling small quantities. Even if the heating medium from the boiler rises in temperature, this heating medium flows into the buffer tank from the buffer bypass pipe, reducing the rate of temperature rise and prolonging the time it takes for the boiler's safety device to operate. This prevents the occurrence of the ciseta link phenomenon, which occurs when boiler combustion and shutdown occur repeatedly in a short period of time.Also, since the boiler combustion time can be extended in this way, boiler combustion can be stopped and It is possible to reduce heat radiation loss in the heat exchanger and piping inside the boiler when boiling, and therefore the boiling time can be shortened.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional example, Fig. 2 is a schematic diagram of an embodiment of the Kinori 1, @ Fig. 3 (a) (b) is a schematic diagram showing the same effect as above, Fig. 4 (a) is an enlarged sectional view of the floor heat storage material, FIG. 4(b) is a schematic enlarged sectional view of an example using the latent heat storage material,
FIG. 5 is a schematic diagram of another embodiment. ft) is a hot water storage tank, (2) is a heat exchanger, (3) is a boiler, (4) is a supply pipe, (6) is a pipe for raising the total volume, (
6) is a collection pipe for small volume boiling, (7) is a small volume ejection passage,
(8) is a buffer bypass pipe, (9) is a buffer tank, 1lO)
is a constant temperature valve. ff1i"J I ト) , -27,・1 it: 3 t21 (0) (b)

Claims (1)

[Claims] +1) A heat exchanger installed on the outer periphery of the hot water storage tank, a supply pipe connecting the upper part of the heat exchanger and the boiler, a return pipe for raising the entire volume connecting the lower part of the heat exchanger and the boiler, and a heat It is equipped with a small-volume ring-raising return pipe that connects the approximately middle section of the exchanger and the boiler, and is connected to the supply pipe and the heat exchange lIJ! A buffer JS Ibus pipe is installed in the small-volume ring-lifting outlet formed by the small-volume ring-lifting return pipe, and a buffer tank is provided in the buffer bypass pipe, and a buffer is provided on the inflow side of the heat medium to the buffer tank. A water heating device characterized in that a fixed valve that opens at a predetermined temperature is provided in a bypass pipe for use in water heating.