JPS624828Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a bath heater that is equipped with a liquid-liquid heat exchanger that circulates hot water in the bathtub, and that indirectly heats the bath water by exchanging heat with the hot water. Bath water stirring impellers, which are driven by utilizing the energy of hot water circulation, are installed at appropriate locations in the bath water flow path, and the stirring impellers forcefully stir and flow the bath water heated by heat exchange. An object of the present invention is to provide a bath heater which reduces the temperature difference between upper and lower bath water and improves the heat dissipation ability of a liquid-liquid heat exchanger.

This invention will be explained below based on embodiments shown in the drawings.

In FIG. 4, reference numeral 1 includes a bath heater 2 that indirectly heats bath water by exchanging heat with hot water in a bathtub. The bus heater 2 is connected with a hot water outgoing pipe 3 that sends hot water from a heat source device 6 that heats hot water to the bus heater 2 using a hot water circulation pump 5, and a hot water return pipe 4 that returns hot water that has undergone heat exchange to the heat source device 6. The hot water is circulated so as to exchange heat with bath water in a liquid-liquid heat exchanger 8 (hereinafter simply referred to as a heat exchanger) of the bath heater 2.

To explain the specific structure of the bath heater 2 in FIGS. 1 to 3, the bath heater 2 is opened at the top and bottom and
A heat exchanger 8 with fins is provided in a serpentine shape in a heater case 7 that allows bath water to flow through, so that heat exchange between the bath water and hot water can be performed, and the lower side of the heat exchanger 8 A bath water stirring impeller 9 which is driven by utilizing the energy of hot water circulation is provided in the bath water flow path. That is, an inlet side power impeller case 11 having a hot water inlet 10 connected to the hot water outgoing pipe 3 in the heater case 7 on the lower side of the heat exchanger 8, and an outlet side power impeller case having a hot water outlet 12 connected to the hot water return pipe 4. A blade wheel case 13 is provided, and a bath water stirring wheel 9 is positioned in the bath water flow path between the two power wheel cases 11 and 13, and both ends of the shaft 14 of the stirring wheel 9 are connected to the power wheel case 11, 13. Power impellers 15 and 16, each of which is inserted into the shaft 13 and rotatably supported, are provided at the ends of the shaft 14, facing the hot water inlet 10 and the hot water outlet 12, respectively, and driven by hot water.

In the above-described embodiment, the bath water stirring impeller 9 is provided in the bath water passageway below the heat exchanger 8, but the invention is not limited to this. For example, the bath water stirring impeller 9 is provided in the bath water passageway above the heat exchanger 8. It can also be provided in The heater case 7 equipped with the heat exchanger 8 is J-shaped along the bathtub 1, and has an upper opening in the vertical direction and a lower opening in the horizontal direction.

Since this invention has the above-mentioned configuration, the heat source device 6
The heated water is sent to the bath heater 2 by the hot water circulation pump 5 as shown by the arrow in Fig. 1, and the heat exchanger uses thermal energy to exchange heat between the hot water and the bath water. Heat source device 6
The kinetic energy of the warm water returned to the water via the hot water return pipe 4 and circulated therein is used to drive the power impellers 15 and 16 on the inlet and outlet sides to rotate the bath water stirring impeller 9. The bath water heated by the heat exchanger 8 inside is stirred and made to flow as shown by the arrow in FIG.

According to the above-mentioned bath heater of this invention, a bath water stirring impeller 9 is installed in the bath water flow path of the hot water heat exchanger 8 in the bathtub 1 by utilizing the kinetic energy of hot water circulation.
With this system, the stirring impeller is automatically rotated by the circulation of hot water, making it possible to stir and flow the bath water that has been indirectly heated with hot water, reducing the temperature difference between the top and bottom, and also making it possible to use the bath heater. Heat dissipation capacity can also be increased, allowing bath water to be boiled efficiently. Furthermore, the drive of the bath water stirring impeller utilizes the energy of hot water circulation, which not only avoids the risk of electrical leakage compared to when driven by a motor, but also allows the bath water to boil faster.
It has advantages such as being useful for energy saving.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing the bath heater of this invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, Fig. 3 is a sectional view taken along line B-B, and Fig. 4 is a sectional view of the bath heater. It is a schematic sectional view provided with a bath heater. 1...Bathtub, 2...Bath heater, 3...Hot water outgoing pipe, 4...Hot water return pipe, 5...Hot water circulation pump, 6...Heat source device, 8...Heat exchanger, 9...Bath water Stirring impeller, 10... Hot water inlet, 12... Hot water outlet, 15, 16... Power impeller.

Claims (1)

[Scope of utility model registration request] A bath heater that indirectly heats bath water in a bathtub by a liquid-liquid heat exchanger with hot water, which includes the heat exchanger, a power impeller driven by the flow rate of the hot water, and a bath heater driven by the power impeller. This bath heater has a bath water stirring impeller for stirring water and is housed in a J-shaped heater case which is placed in a bathtub 1 with the top and bottom open.