JPH0325084Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bath heating device using a double pipe heat exchanger.

[Conventional technology]

Conventionally, so-called hot water circulation bathtubs have been used, which circulate hot water heated by an external heat source through circulation pipes installed in the bathroom, and indirectly heat the bath water with the hot water. . This bathtub has a structure in which a circulation pipe, that is, a heat exchanger is disposed on the bottom surface of the bathtub, or a structure in which it is attached to the inner surface of the side wall of the bathtub.

On the other hand, with the above-mentioned design, as shown in Figure 4, the former requires piping space on the bottom, the height of the bathtub is high, and it is not suitable for use as a stationary type, and it is difficult to clean the bottom of the bathtub. There was a drawback. In addition, in the latter case, as shown in Figure 5, the heat exchanger, which is a spirally wound circulation pipe, is attached and fixed to the inner surface of the side wall of the bathtub, which has the disadvantage of making the inside of the bathtub narrow and requiring complicated work. .

In order to improve the above drawbacks, we formed a double-tube heat exchanger consisting of an inner tube and an outer tube, and placed it between an external heat source device and the bathtub, and transferred high-temperature water heated by the heat source device to the inner tube. In addition, an idea was created to heat the bathtub water by passing the low-temperature water in the bathtub through an outer tube to exchange heat.

[Problem that the invention attempts to solve]

However, as shown in Figures 2 and 3, the outer tube for circulating bath water in a double-pipe heat exchanger has an uneven water passage shape due to eccentricity between the inner tube and the outer tube, especially at the bent portion. At the same time, the inner tube comes into contact with the outer tube in a part. As a result, vortices are generated in the flow inside the outer tube, flow in the opposite direction occurs, and stagnation occurs where the flow velocity is slow.

Therefore, if bathtub water containing hair, lint, dirt, etc. is circulated through the outer pipe, it may become clogged, or the deposits that have grown to some extent may harden in the bathtub and flow out, making it difficult to take a bath. It had some flaws that made people uncomfortable.

The present invention was made in view of the above drawbacks, and uses a heat source device such as a hot water heating heat source device, a hot water boiler, etc., and a double pipe heat exchanger to easily heat a bathtub, and to remove lint and human hair. The object of the present invention is to provide a bath heating device using a double-tube heat exchanger that is free from clogging with dirt and the like.

[Means for solving problems]

The configuration of the present invention for achieving the above object will be explained using FIG. 1 corresponding to the embodiment. In a bath heating device consisting of a circulation circuit in which water circulates, a bathtub circulation circuit in which bath water circulates, and a heat exchanger in which both circulation circuits exchange heat, an inner pipe 3 and an outer pipe 4 are disposed within a casing 13.
A circulation pump 5 is provided in a part of the inner tube 3, and a casing 1 is formed.
The inflow pipes 14 and 1 of the inner pipe 3 and outer pipe 4 are placed on the outside of 3.
5. Protrude the outflow pipes 14' and 15' to form a double pipe heat exchanger 2, and connect the outgoing pipe 9 and return pipe 10 of the hot water heating heat source device 1 to the inflow pipe of the outer pipe 4 of the heat exchanger 2. 15
A technical measure is taken in which the outgoing pipe 11 and the return pipe 12 of the bathtub 8 are connected to the inlet pipe 14 and the outflow pipe 14' of the inner pipe 3 of the heat exchanger 2, respectively.

[Effect]

According to the above-mentioned means, the medium liquid, that is, high-temperature water heated by the hot water heater 1 flows through the outgoing pipe 9 by the circulation pump (not shown) built in the hot water heating heat source device 1, and flows through the double pipe. It flows into the outer pipe 4 from the end of the outer pipe 4 on the bathtub return pipe 12 side in the heat exchanger 2, flows between the inner pipe 3 and the outer pipe 4 of the circulation circuit of the heat exchanger 2, and flows to and from the bathtub. The pipe 11 returns to the hot water heating machine 1 from the outer pipe 4 end via the return pipe 10 of the hot water heating heat source machine. The bathtub water is then sucked into the bathtub supply pipe 11 by a circulation pump installed in the inner pipe 3 in the double pipe heat exchanger 2, and the heated water from the hot water heating heat source device 1 is pumped into the inner pipe 3. The hot water flows in the opposite direction and circulates through the inner pipe 3 to exchange heat between the hot water of the hot water heating heat source device 1 and the low-temperature water in the bathtub, and returns to the bathtub 8 via the return pipe 12.

〔Example〕

An embodiment of the present invention will be described below based on FIG.

2 is a double pipe heat exchanger, and the heat exchanger 2 has inlet and outlet pipes 1 outside the casing 13 for connecting to the inflow and return pipes 12 of the bathtub circulation circuit 7.
4 and 14' are provided protrudingly from the casing 13.
Inside, an inner pipe 3 is formed by providing a circulation pump 5 on the inflow pipe 14 side, which is bent in a meandering or spiral shape connected to the inflow and outflow pipes 14, 14', and for forcibly circulating the bath water. . Then, an outer pipe 4 is formed by providing a gap from the inner pipe 3 of the inflow pipe 14 downstream of the pump 5 to the inner pipe 3 near the connection part of the outflow pipe 14. Furthermore, one end of the hot water inflow pipe 15 for connection to the outflow pipe 9 of the circulation circuit 6 of the hot water heating heat source device 1 is connected to the end of the outer pipe 4 near the outflow pipe 14' connection part of the inner pipe 3, and A return pipe 10 of the hot water heating heat source device 1 is attached to the end of the outer pipe 4 near the connection part of the inflow pipe 14 of the inner pipe 3.
One end of the hot water outflow pipe 15' for connection to the hot water outflow pipe 15' is connected, and each other end is made to protrude outside the casing 13.

The inflow pipe 14 and the outflow pipe 14' connected to the inner pipe 3 of the double pipe heat exchanger 2 are respectively connected to the outflow pipe 1.
1 and a return pipe 12 to form a circulation circuit of the bathtub 8 - the outgoing pipe 11 - the inflow pipe 14 - the pump 5 - the inner pipe 3 - the outflow pipe 14' - the return pipe 12 - the bathtub 8. There is. Further, a hot water inflow pipe 15 and a hot water outflow pipe 15' connected to the outer pipe 4 are connected to the hot water heater 1 through an outgoing pipe 9 and a return pipe 10, respectively, so that the hot water heating heat source device 1 - outgoing pipe 9 - hot water Inflow pipe 15 - Outer pipe 4 - Hot water outflow pipe 15' - Return pipe 10
- Forms a circulation circuit of the heat source device 1 for hot water heating.

In the above embodiments, the heat source device is a hot water heater, but the heat source device is not limited to the above embodiments, and may be a hot water boiler. Furthermore, the double pipe heat exchanger can be installed anywhere between the bathtub and the heat source device, allowing effective use of the installation space.

〔effect〕

Therefore, since the present invention has the above-mentioned configuration, the bath water circulating through the inner tube is not affected by the deformation of the water passage due to the decentering between the outer tube and the inner tube, and therefore there is no lint or human hair in the inner tube. To provide a bath heating device that does not become clogged even when bath water containing dirt and the like is poured.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an embodiment of the present invention, Fig. 2 is a partial sectional view showing an embodiment of the invention, Fig. 3 is a sectional view taken along line A-A in Fig. 2, Figs. FIG. 2 is a sectional view showing a conventional embodiment. Explanation of symbols, 1...Heat source machine for hot water heating, 2...
Double tube heat exchanger, 3... Inner tube, 4... Outer tube, 5...
...Circulation pump, 6...Circulation circuit, 7...Circulation circuit, 8...Bathtub, 9...Outgoing pipe, 10...Return pipe, 11...Outgoing pipe, 12...Return pipe, 13...
Casing, 14...inflow pipe, 14'...outflow pipe,
15...Hot water inflow pipe, 15'...Hot water outflow pipe.

Claims (1)

[Scope of utility model registration request] Consists of a heat source device for hot water heating with a built-in circulation pump, a circulation circuit connected to the heat source device through which heat medium liquid circulates, a bathtub circulation circuit in which bathtub water circulates, and a heat exchanger in which both circulation circuits exchange heat. In a bath heating device, a double-tube circulation circuit consisting of an inner tube and an outer tube is formed inside the casing, and a circulation pump is installed in a part of the inner tube, and an inlet tube and an outlet tube for the inner tube and outer tube are installed outside the casing. The tubes are protruded to form a double-pipe heat exchanger, and the inflow and return pipes of the heat source device for hot water heating are connected to the inflow and outflow pipes of the outer tube of the heat exchanger, and the outflow and return pipes of the bathtub are connected to the inflow and outflow pipes of the heat exchanger outer tube. A bath heating device using a double pipe heat exchanger, characterized in that the inflow pipe and the outflow pipe of the heat exchanger inner pipe are connected to each other.