JPH0218436Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a bathtub in which a combustion chamber equipped with a heat exchanger communicates with outside air.

(Conventional technology) This type of conventional bathtub has a water intake at the bottom of the wall.
A hot water supply port is placed at the top, and each of these water intake ports and hot water supply port is connected to a heat exchanger via a pipe, and this heat exchanger is heated in the combustion chamber, and the water in the bathtub is heated by convection. I try to circulate it. Furthermore, in recent years, many bathtubs of this type have combustion chambers that communicate with the outside, so that outside air is introduced to burn fuel and the fuel is exhausted outside.

(Problem to be solved by the invention) In such conventional bathtubs, especially those with a structure that introduces outdoor air into the combustion chamber, when the burner is ignited, low-temperature air is passed through the heat exchanger. The water is heated, but if the burner is not lit, especially in winter, the combustion chamber is open to the outdoors, so the hot water in the heat exchanger is cooled by the outdoor air, and the heated bathtub is heated. There was a problem with the hot water getting cold.

The present invention was developed by focusing on these points, and when the heat exchanger is not supplying heat to the water, the hot water does not circulate through the heat exchanger to prevent the hot water in the bathtub from cooling down. The purpose of this project is to provide a bath kettle that is made of water.

(Means for Solving the Problems) Therefore, in the present invention, the bathtub is equipped with a heat exchanger for heating the water in the bathtub in a combustion chamber that communicates with outside air, and is provided at the bottom and top of the bathtub, respectively. In a bathtub in which a pipe connected to a perforated water intake port and a hot water supply port is connected to a water intake side and a hot water discharge side of the heat exchanger, a discharge pipe connected to the hot water discharge side of the heat exchanger is The end portion and the end portion of the hot water supply pipe connected to the hot water supply inlet of the bathtub are connected to form a trap having a hot water reservoir, and the water vapor generated when the heat exchanger heats the heat exchanger has an air lift effect. The water in the bathtub is circulated by supplying hot water from the discharge pipe to the hot water supply pipe.

(Function) With this configuration, when boiling a bath, fuel such as gas is burned to heat the heat exchanger and supply heat to the water in the bathtub. Then, the water is heated and becomes hot water, and the hot water rises in the discharge pipe due to the air lift effect of the steam generated during heating, and the hot water is supplied to the hot water supply pipe at the hot water reservoir part of the trap, and the hot water is turned into hot water. The water inside will circulate and the bath will boil. Next, when the heat exchanger is not supplying heat to water by extinguishing the fire in the combustion chamber, the hot water in the bathtub is prevented from circulating through the heat exchanger and inside the bathtub, and the outside air is Avoid losing heat. Therefore, the hot water in the bathtub is difficult to cool down.

(Example) Next, an example of implementation of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a first embodiment of the present invention. In the figure, 1 is a heat exchanger, and a combustion chamber in which this heat exchanger 1 is installed communicates with the outdoors. 2 is the heat exchanger 1
This water suction pipe 2 is connected to a water intake port 3a formed at the lower part of the wall surface of the bathtub 3. Reference numeral 4 designates a discharge pipe connected to the hot water discharge side of the heat exchanger 1, and this discharge pipe 4 is inserted from one end of the hot water supply pipe 5, and a hot water reservoir portion 5a protrudes in the middle of the hot water supply pipe 5. The tip opening 4a of the discharge pipe 4 projects upward from the liquid level of the hot water stored in the hot water reservoir 5a. Further, the other end of the hot water supply pipe 5 is connected to a hot water supply port 3b formed at the upper part of the wall surface of the bathtub 3. In this way, a trap is formed at the connection between the discharge pipe 4 and the hot water supply pipe 5.

In addition, 6 in the figure indicates the discharge pipe 4 and the hot water supply pipe 5.
This is an O-ring that seals the connection between the

In the bathtub constructed in this way, the heat exchanger 1 is connected to the water intake pipe 2 from the water intake port 3a of the bathtub 3.
The water in the bathtub that enters the bathtub is heat exchanged with the heat of the burner in this heat exchanger 1. Therefore, the water turns into hot water in the heat exchanger 1, and as the steam rises, the air lift action causes the water to flow through the tip opening 4a of the discharge pipe 4 into the hot water pool 5 of the hot water supply pipe 5.
The hot water overflows into the bathtub 3 from the hot water supply pipe 5 through the hot water supply port 3b.

Although the heat exchanger 1 is cooled by the outside air when the burner is not ignited, the tip opening 4a of the discharge pipe 4 is connected to the hot water supply pipe 5.
Since the water surface of the hot water reservoir 5a is located at a higher position than the water surface in the bathtub, hot water does not circulate backwards from the hot water supply port 3b of the bathtub 3 to the heat exchanger 1, and the water between the bathtub 3 and the heat exchanger 1 is The water does not cool down due to the circulation.

In the first embodiment, the discharge pipe 4 is replaced by the hot water supply pipe 5.
The trap is inserted from one end and the tip opening 4a is projected into the hot water reservoir 5a of the hot water supply pipe 5 to form a trap, and the hot water is moved by the air lift action, but this is not limited to this embodiment. For example, as shown in FIG. 2, the discharge pipe 10a
The air lift pipe 11 is inserted into the inside of the hot water supply pipe 10b and the air lift pipe 1 is integrated.
Alternatively, one end 11a of the hot water tank 1 may be made to protrude into the hot water reservoir 10c, and the other end 11b may be brought into close contact within the discharge pipe 10a to form a trap, and the hot water may be moved to the hot water supply pipe 10b by an air lift effect. In FIG. 2, the same components as those in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.

Further, as shown in FIG. 3, the discharge pipe 12a and the hot water supply pipe 12b are integrally connected via the intermediate upward curved portion 12c to form a trap, and hot water is transferred from the discharge pipe 12a to the hot water supply pipe 12b by an air lift effect. It may be moved to . Third
In the figure, the same components as those in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted.

(Effects of the invention) The present invention is constructed as described above, and connects the discharge pipe on the discharge side of the heat exchanger and the hot water supply pipe by forming a trap, and uses the water vapor generated during heating to connect the heat exchanger to the hot water supply pipe. The heat exchanged hot water is transferred from the discharge pipe to the hot water supply pipe to circulate the water in the bathtub, and when the heat exchanger is not in heating operation, the tip opening of the discharge pipe is at a position higher than the water surface of the bathtub. Hot water does not circulate backwards from the hot water supply port to the heat exchanger, and even if the heat exchanger is cooled by outside air, the hot water in the bathtub does not get cold.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a schematic configuration of a first embodiment of a bathtub according to the present invention, FIG. 2 is a cross-sectional view showing a schematic configuration of a second embodiment of a bathtub according to the present invention, and FIG. It is a sectional view showing a schematic structure of a third example of a bathtub according to the present invention. 1...Heat exchanger, 2...Water intake pipe, 3...Bathtub, 3b...Hot water supply port, 3a...Water intake port, 4,10
a, 12a...discharge pipe, 5, 10b, 12
b...Hot water pipe.

Claims (1)

[Claims for Utility Model Registration] A heat exchanger for heating water in a bathtub is provided in a combustion chamber that communicates with outside air, and is connected to a water intake port and a hot water supply port provided at the bottom and top of the bathtub, respectively. In the bathtub, the end of the discharge pipe connected to the hot water side of the heat exchanger is connected to the hot water inlet of the bathtub. The end of the hot water supply pipe is connected to form a trap with a hot water reservoir, and hot water is supplied from the discharge pipe to the hot water supply pipe by the air lift effect of the steam generated when the heat exchanger heats the bathtub. A bath kettle characterized by the fact that the water inside it circulates.