JPS5844177B2 - Hot water circulation heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention pumps hot water in a bubble generator to a water storage device by a bubble pump action in the bubble generator, and uses the head pressure difference between the head on the bubble generator side and the head on the water storage device to pump hot water into the water storage device. The internally heated water flows through the radiator and then flows back to the bubble generator.
The present invention relates to a hot water circulation heating device configured to perform heating by circulating hot water through a radiator.

This type of hot water circulation heating system is more economical than a forced circulation system using a pump in terms of initial capital investment and heating operation and maintenance costs, and has the advantage of eliminating noise problems. On the other hand, the temperature of the hot water pumped into the water storage device by the action of the bubble pump is as high as approximately 100°C, and this high-temperature hot water is flowed directly into the radiator, so the surface temperature of the radiator is lower than necessary. This has the disadvantage of causing an abnormal temperature rise, and the disadvantage of reducing the durability of the radiator in a short period of time.

The reality is that there is no means to effectively control the surface temperature of the radiator.

The present invention focuses on such problems and aims to eliminate the above-mentioned disadvantages and drawbacks.

A hot water circulation heating device according to the first aspect of the present invention is a hot water circulation heating device configured to circulate hot water to a radiator using a pressure difference between a bubble generator side head and a water storage device side head and a bubble pump action. It is characterized by being equipped with a liquid-liquid heat exchanger that exchanges heat between the circulating hot water in the outgoing pipe to the radiator and the circulating hot water in the returning pipe from the radiator.

In other words, the liquid-liquid heat exchanger lowers the temperature of the hot water flowing into the radiator from the water storage device, which is at a high temperature of about 100°C, to an appropriate value, making the surface temperature of the radiator suitable for comfortable heating. At the same time, the durability of the radiator can be maintained as expected over a long period of time.Furthermore, since the hot water returned from the radiator is heated by the liquid-liquid heat exchanger, it can be heated by the bubble generator. It also has the side effect of making it easier to efficiently perform the bubble pump action again at the return stage, and as a whole it has become possible to provide an extremely rational and economical hot water circulation heating device.

In addition to the structure of the first invention, the second invention further provides a branch connection to the outgoing pipe midway from the liquid heat exchanger to the radiator, from the outgoing pipe midway in the liquid heat exchanger section. The method is characterized in that the pipe is bypass-connected, and a flow path switching valve is interposed in this connection. This has an effective effect of being able to control the amount of heat exchanged in the liquid-liquid heat exchanger, that is, the surface temperature of the radiator.

In both the first and second inventions, if a liquid-liquid heat exchanger is used to double as a return hot water reservoir for the bubble generator, the entire device can be made more compact and the structure can be simplified. It's very convenient to have.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a schematic configuration diagram of a hot water circulation heating apparatus according to the first invention, and 2 is a bubble generator heated by a burner 1, and a gas-liquid rising pipe 2a is guided upward from here.
The upper end portion of the water storage device 3 is opened and communicated with the water storage device 3 .

Reference numeral 8 denotes a radiator such as a floor panel, which is connected to the hot water storage device 3 via a hot water outgoing pipe 7, and a hot water return pipe 6, which is also connected to the radiator 8, is connected to the liquid-liquid heat exchanger 4. The liquid-liquid heat exchanger 4 and the bubble generator 2 are connected to each other via a return pipe 4b.

A midway portion of the outgoing pipe 7 is included in the liquid-liquid heat exchanger 4,
The liquid-liquid heat exchanger 4 has a relatively large capacity and also serves as a reservoir for hot water returned to the bubble generator 2, and is connected to the hot water reservoir 3 through a pressure equalizing pipe 4a.

In this system, the hot water in the bubble generator 2 is heated to the burner 1.
The liquid-liquid heat exchanger 4 is heated by the gas-liquid rising pipe 2a and pumped into the hot water storage device 3 by a bubble pump action, and also serves as a hot water storage device for returning hot water to the head on the hot water storage device 3 side and the bubble generator 2. Due to the pressure difference with the side head, the hot water in the water storage device 3 flows through the outgoing pipe 7 to the radiator 8, where it radiates heat, and then flows through the return pipe 6 to the heat exchanger 4, and then to the return pipe 4.
The air is returned to the bubble generator 2 via the air bubble generator 2 through the air bubble generator 2, and is thereby circulated through the entire flow path.

At this time, in the liquid-liquid heat exchanger 4, the hot water in the outgoing pipe 7 is
While the temperature of the return hot water from the return pipe 6 is lowered, the temperature of this return hot water is increased.

For example, when the hot water temperature inside the water storage device 3 is about 100'C, the hot water inside the outgoing pipe 7 that exits the heat exchanger 4 reaches a temperature of about 75°C, reaches the radiator 8, and after the heat is radiated, the temperature becomes about 45°C. The hot water in the return pipe 6 becomes approximately 70° C. in the heat exchanger 4 and returns to the bubble generator 2 via the return pipe 4b.

FIG. 2 relates to a second invention, and in the first invention described above, an intermediate portion of the outgoing pipe 7 from the liquid-liquid heat exchanger 4 to the radiator 8 is placed in the middle part of the outgoing pipe 7 in the heat exchanger 4. A pipe 7a branched from the pipe 7a is connected by bypass, and a flow path switching valve V is interposed at this connection.

When this valve (2) is switched to the flow path A side, the heat exchange capacity is reduced, the hot water temperature in the outgoing pipe 7 on the downstream side of the valve V is also maintained high, and the amount of heat radiated by the radiator 8 is therefore increased.

For example, when the valve V is switched to the flow path B side and the hot water in the outgoing pipe 7 is about 75°C, when the valve ■ is switched to the flow path A side, the hot water in the bypass pipe 7a is about 85°C. The heated water in the return pipe 4b, which was sent to the radiator 8 and was at about 70°C, becomes about 60°C.

Figure 3 shows an example of valve ■, with manually operated valve rod V
It is impossible to alternately switch between the flow paths A and B via the channel a.

Note that the valve V may be configured to automatically switch based on the indoor temperature detection result.

FIG. 4 shows the configuration of the main parts of the one in FIG. Components are included.

3a is an air vent, and 5 is a water injection cylinder for the liquid-liquid heat exchanger 4.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the hot water circulation heating device according to the present invention, FIG. 1 is a schematic configuration diagram according to the first invention, FIG. 4 is an enlarged perspective view showing the main parts thereof, and FIG. A schematic configuration diagram according to the second invention, and FIG. 3 is a sectional view of that part. 2...Bubble generator, 3...Water storage device, 4
...Liquid heat exchanger, 6... Return pipe, 7.
... Outgoing pipe, γa ... Bypass pipe, 8...
...Radiator, ■...Flow path switching valve.

Claims (1)

[Scope of Claims] 1. In a hot water circulation heating device configured to circulate hot water to a radiator 8 using a pressure difference between a head on the 2 side of the bubble generator and a head on the 3 side of the water storage device and a bubble pump action, the radiator Circulating hot water in outbound pipe 7 to 8 and return pipe 6 from radiator 8
A hot water circulation heating device characterized by being provided with a liquid-liquid heat exchanger 4 for exchanging heat with circulating hot water. 2. The hot water circulation heating device according to claim 1, wherein the liquid-liquid heat exchanger 4 also serves as a return hot water reservoir for the bubble generator 2. 3. In a hot water circulation heating device configured to circulate hot water to the radiator 8 using the pressure difference between the bubble generator 2 side head and the water storage 3 side head and the action of the bubble pump, the outgoing pipe 7 to the radiator 8 Circulating hot water inside and return pipe 6 from radiator 8
A liquid-liquid heat exchanger 4 is provided for exchanging heat with circulating hot water in the liquid-liquid heat exchanger 4, and a liquid-liquid heat exchanger 4 is provided in the middle of the outgoing pipe 7 from the liquid-liquid heat exchanger 4 to the radiator 8. A hot water circulation heating apparatus characterized in that a pipe 7a branched from an intermediate part of the pipe 7 is connected by bypass, and a flow path switching valve V is interposed at this connection part. 4. The hot water circulation heating device according to claim 3, wherein the liquid-liquid heat exchanger 4 also serves as a return hot water reservoir for the bubble generator 2.