JPH02601Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention places a cylindrical body above the burner to form a combustion gas ascending flow path, and a water pipe through which water to be heated passes through the cylindrical body. The present invention relates to an instantaneous water heater in which a finned water pipe attached to the water pipe and connected to the water pipe is arranged in the combustion gas upward flow path.

[Conventional technology]

Conventionally, as shown in FIG. 2, water is sent from a water pipe 4b attached to a cylindrical body 2 to a water pipe 4c with fins, and the flame of the burner 1 and the combustion gas in the ascending flow path 3 cause water to flow inside the water pipes 4b and 4c. It was configured to heat water.

[Problem that the invention attempts to solve]

However, the upper limit of conventional instantaneous water heaters is a thermal efficiency of about 85 to 90%, and further improvements in thermal efficiency have been desired from the standpoint of fuel efficiency and energy conservation.

The purpose of the present invention is to make it possible to sufficiently improve thermal efficiency with simple modifications.

[Means for solving problems]

The characteristic configuration of the present invention is that a power supply device is provided to provide a potential difference of 3KV or more between a cylindrical body that forms a combustion gas upward flow path and is attached with a water pipe, and a burner placed at the bottom of the cylindrical body. The functions and effects are as follows.

[Effect]

In other words, in a water heater where the flame of the burner and the cylindrical body are almost parallel when there is no power supply, (a) when the positive electrode of the DC power source is connected to the burner and the cylindrical body is grounded, (b) ) When the negative electrode of the DC power source is connected to the burner and the cylindrical body is grounded, (c) When the AC power source is connected to the burner and the cylindrical body is grounded, The state of heat transfer was investigated by applying a potential difference between the two.

As a result, in either case, if a potential difference of 3KV or more is applied, the burner flame that is close to the inner surface of the cylindrical body will be drawn toward the cylindrical body, causing the flame and combustion gas to interact with the cylindrical body. It was confirmed that the heat transfer efficiency between the solid body and the solid body was significantly improved.

By the way, when we installed a heat transfer amount measurement sensor in the cylindrical body at a position corresponding to the tip of the flame and measured the amount of heat transfer, we found that compared to the case without a power supply device,
Approximately 70 times in case of above B, approximately 23 times in case of above B
The amount of heat transfer has increased by a large amount, almost twice as much.

[Effect of idea]

As a result, the overall thermal efficiency has been improved to about 90 to 95%, or approximately 5% higher than before, making it possible to provide an instantaneous water heater that is even better in terms of fuel efficiency and energy savings.

Furthermore, since it is simply necessary to add a power supply device, it can be easily modified, and thermal efficiency can be advantageously improved in terms of manufacturing and cost.

〔Example〕

Next, an example will be shown with reference to FIG.

A cylindrical body 2 is placed above the burner 1, and the cylindrical body 2 is placed above the burner 1.
An ascending flow path 3 for combustion gas from the burner 1 is formed inside.

A water pipe 4b connected to the water supply pipe 4a is spirally wound around the cylindrical body 2, and a finned water pipe 4c connected to the water pipe 4b and the hot water outlet pipe 4d is arranged on the upper side of the combustion gas upward passage 3. , an instantaneous water heater that heats water in water pipes 4b and 4c by the flame of burner 1 and combustion gas.

The DC power supply device 5 is provided with a positive electrode being supplied to the burner 1 and a negative electrode being grounded, and the cylindrical body 2 is grounded.
It is configured to apply a potential difference of 3KV or more between the burner 1 and the flame of the burner 1 toward the cylindrical body 2 side.

[Another example]

Next, another embodiment will be described.

Structure of burner 1, type of fuel, water pipes 4b, 4c
The piping and other specific configurations of the water heater can be selected as appropriate.

The power supply device 5 can be of a direct current type in which a negative electrode is connected to a burner, an alternating current type, a type in which alternating current is converted to direct current, or various other types.

When the cylindrical body 2 and the water pipe 4b are electrically connected, the power supply device 5 may be connected to the water pipe 4b.

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram of an embodiment of the present invention, and FIG. 2 is a conceptual diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Burner, 2... Cylindrical body, 3... Combustion gas rising channel, 4b... Water tube, 4c... Water tube with fins, 5... Power supply device.

Claims (1)

[Claims for Utility Model Registration] A cylindrical body 2 forming a combustion gas upward passage 3 is arranged above the burner 1, and a water pipe 4b for passing water to be heated is attached to the cylindrical body 2. This is an instantaneous water heater in which a finned water pipe 4c connected to a finned water pipe 4c is disposed in the combustion gas ascending flow path 3, and a power supply device 5 that applies a potential difference of 3 KV or more between the burner 1 and the cylindrical body 2. An instant water heater is provided. The water heater according to claim 1, wherein the power supply device 5 is a DC power supply device having a positive electrode connected to the burner 1.