JPS6053742A - Hot-water boiler - Google Patents

Abstract

PURPOSE:To reduce fluctuating width of hot-water temperature upon supplying hot-water and prevent local boiling due to remaining heat after stopping the supply of hot-water by a method wherein high-temperature hot-water in a boiler cylinder is guided from the upper part of a mixing tank into the lower part thereof to mix the high-temperature hot-water with low-temperature hot-water while the supply of hot-water is effected from the upper part of the tank. CONSTITUTION:Water, which flows into the boiler through a feed water pipe 5 and a boiler body 4, is heated by the combustion in a burner 3, is guided to the lower part of the mixing tank 7 through a hot-water outlet pipe 6 and is mixed with the hot-water in the mixing tank 7. According to this method, the temperature of water is averaged and, thereafter, the hot-water is supplied through a hot-water supplying pipe 8. During supplying hot-water, the non-return valve 11 of a bypass pipe 10 is closed while the hot-water is circulated between the mixing tank 7 and the boiler body 4 through the non-return valve 11 during stopping the supply of the hot-water to restrict boiling in the boiler body 4 due to remaining heat. According to this method, the fluctuating width of hot-water supplying temperature may be reduced and the local heating due to additional heating after stopping the supply of hot-water may be prevented.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a hot water boiler used for hot water supply.
This is to reduce fluctuations in hot water temperature during continuous hot water supply.

Conventional configurations and their problems Conventional systems, for example, in which the heat exchanger tubes of a hot water boiler are wound, are not easy to use because the amount of water in the can is small, and the hot water supply temperature fluctuates greatly as the burner starts and stops. In addition, there was a risk that the water in the can would locally boil due to the after-boiling after the hot water supply was stopped, and that high-temperature water would be supplied as is when hot water was re-supplied.

OBJECT OF THE INVENTION To suppress fluctuations in hot water temperature during continuous hot water supply, and at the same time to prevent local boiling due to after-boiling of water in the can after hot water supply is stopped.

DESCRIPTION OF THE INVENTION To achieve this objective, the present invention provides a
A water supply pipe and a hot water supply pipe are connected to the upper part of the mixing tank, and the hot water supply pipe is inserted from the upper part into a mixing tank having a hot water supply pipe at the upper part, and the water supply pipe is opened at the lower part, and at the same time, a bypass pipe is connected to the lower part of the mixing tank and the water supply pipe. This feature is characterized by providing a hot water supply system, which solves the problems of large temperature fluctuations during hot water supply and the occurrence of after-boiling.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described with reference to FIG.
The can body is made up of a pipe 31 wound around the outer circumference of the can body 1, and 5.6 is a water supply pipe and hot water outlet pipe connected to the lower and upper parts of the can body 4, and 7 is the upper part. The mixing tank has a hot water supply pipe 8 at the top thereof, and 9 is the end of the hot water outlet pipe 6 which is inserted from the upper part of the mixing tank 7 and opens at the lower part. 10i
d Check valve 11 connecting the lower part of the mixing tank 7 and the water supply pipe 5
It is a bypass pipe with

To explain the present invention in detail, the burner 3ff installed at the bottom of the flue 2 inside the can body 1: When the burner 3ff is operated, the generated high-temperature combustion gas splits the flue 2 and then is discharged to the outside of the machine. . on the other hand,
The flow on the water side is from the water supply pipe 5 to the can body 4 where the pipe is wound around C.
After being supplied to the lower part of the combustion chamber, it circulates inside the can body 4 and exchanges heat with the combustion exhaust gas. The hot water heated to a high temperature passes through the outlet pipe 6. At this time, it passes through the mixing tank 7 and is guided to the mixing tank 7 from the end opening 9 at the bottom of the mixing tank 7, where it is mixed with the hot water in the mixing tank 7, and at the same time, in the mixing tank 7, it is mixed with the hot water in the outlet pipe 6. Since heat transfer occurs between the hot water and the hot water in the mixing tank 7, the hot water obtained from the hot water supply pipe 8 is reduced in temperature during fluctuations. The flow in the bypass pipe 1o is stopped by the check valve 11 when the hot water is being supplied to the hot water supply pipe 8. If the hot water is not being supplied, the flow is from the can body 4 to the hot water outlet pipe 6. Since the circulation circuit of mixing tank 7→bypass pipe 1o→water supply pipe 5→can rest 4 is configured, after-boiling of water from the 4 cans after hot water supply is stopped can be suppressed to a low level, and local boiling can be prevented. I can do it.

Effects of the invention (1) Fluctuation range of hot water supply η during continuous heating is suppressed.

The water heated to a high temperature in the can is led to the mixing tank from the hot water outlet pipe that opens at the bottom of the mixing tank, and then is supplied from the hot water supply pipe, but at the same time it is mixed inside the mixing tank. Since heat exchange takes place between the hot water and the hot water in the outlet pipe, the amount of heat is small during fluctuations in the hot water supply temperature.

2. Local boiling caused by ff1li of water in the can can be prevented.

When the hot water supply is stopped, a circulation circuit is formed from the can body to the supply pipe to the mixing tank to the bypass pipe to the water supply pipe to the can body, thereby preventing local boiling of the water in the can.

5bei=nisu a　Conversion of equipment to 1-unit is shown in Figure n.

Since the mixing tank can be made vertically long, it is possible to save space and downsize the equipment.

[Brief explanation of the drawing]

The figure is a sectional view showing the overall configuration of a hot water boiler according to an embodiment of the present invention. 4... Can body, 5... Water supply pipe, 6...
... Hot water pipe, 7... Mixing tank, 8...
...Hot water pipe, 9...River/hot water pipe opening, 10...
bypass pipe.

Claims (1)

[Claims] (1) Connect a water supply pipe and a hot water outlet pipe to the lower part of the can body and the second part, and insert the hot water supply pipe from the second part into a mixing tank that has a hot water supply pipe in the second part, and open it at the bottom. A hot water boiler. 2) The hot water boiler according to claim 1, which is provided with a bypass pipe that connects the lower part of the mixing tank and the water supply pipe.