JPH0240435Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an automatic hot water supply device used for supplying hot water to bathtubs. <Prior art and its problems> In the conventional automatic water heater for bathtubs, the hot water heated by the automatic water heater is supplied from the other end of the automatic hot water pipe whose one end is connected to the top of the automatic water heater. ,
The water is dropped into a hopper installed vertically directly below it, and is fed into the bathtub via the supply and discharge circulation fittings installed at the bottom of the bathtub. Although a small amount of hot water is rapidly dropped, as the hot water increases, the head difference decreases, so before the hot water dropped into the hopper completely enters the bathtub,
Problems with overflowing from the top of the hopper often occur. Therefore, the present invention solves the drawbacks of the above-mentioned conventional technology,
To provide an automatic hot water supply device for a bathtub capable of quickly and completely feeding hot water from an automatic water heater into a bathtub without causing the hot water to overflow from a hopper to the outside, regardless of a reduction in the head difference. <Means for Solving the Problems> In the automatic hot water supply device for bathtubs according to the present invention, the lower end of the hopper is connected to the outer surface of the circulation fitting, and the lower end of the hopper is connected to the part of the circulation fitting near the connection port of the hopper. One end of the return pipe is connected, and at least a part of the hot water dropped from the hopper into the circulation fitting is sucked into the return pipe and returned to the circulation pump disposed outside the bathtub, and the return hot water flows through the return pipe. It is characterized in that it is fed into the bathtub by being fed into the bathtub through a portion of the circulation fitting near the bathtub. <Function> Hot water from the automatic water heater is fed into the bathtub via the automatic water heater, hopper, and circulation fitting, and after the water level in the bathtub reaches a level higher than the top of the circulation fitting, the present invention is applied. When the circulation pump connected to the automatic water heater for bathtubs is operated, a part of the hot water that is dropped into the circulation fitting from the hopper is once sucked into the circulation pump through the return pipe and becomes return hot water. It is discharged, sent through the outgoing pipe to the circulation fitting again, and is quickly and safely delivered into the bathtub without causing backflow in the hopper. <Example> The automatic hot water supply device for a bathtub according to the present invention will be described in detail below based on an example thereof. FIG. 1 shows a state in which the automatic hot water supply device for a bathtub is installed in a bathtub. The automatic water heater 1 is installed at an appropriate location outside the bathtub A. The other end of the automatic water supply pipe 2, one end of which is connected to the top of the automatic water heater 1, is placed directly above the upper end of the hopper 3, which is vertically attached to the outside of the bathroom wall B. The lower end of the hopper 3 is connected to the outer surface of a circulation fitting 4 for supply and discharge, which is attached to the lower part of the bathtub A. On the other hand, as shown in the figure, one end of the return pipe 5 is connected to the top of the circulation fitting 4 directly above the lower end, and the other end is connected to a circulation pump 6 installed at the bottom of the automatic water heater 1. Further, one end of the outflow pipe 7 is connected to the top of the circulation fitting 4 near the bathtub A, and the other end is similarly connected to the circulation pump 6. Since this automatic hot water supply device for a bathtub has the configuration as detailed above, the hot water heated by the automatic water heater 1 passes through the automatic hot water supply pipe 2 and drops vertically into the hopper 3 from the end thereof. It is fed into the bathtub A from the outer surface of the circulation fitting 4. After the hot water gradually accumulates in the bathtub A and the water level exceeds the top of the circulation fitting 4, when the circulation pump 6 is started, the hot water drops from the hopper 3 into the outer surface of the circulation fitting 4. The liquid passes through a return pipe 5 opened at the top of the circulation fitting 4, which is directly above the lower end of the hopper 3, and is sucked into the circulation pump 6. The return hot water discharged from the circulation pump 6 passes through the outgoing pipe 7 and is again sent to the top of the circulation fitting 4 near the bathtub A. Hopper 3 here
A large amount of hot water dropped from the lower end is attracted by the kinetic energy provided by the circulation pump 6 and joins the returned hot water, and the entire amount is fed into the bathtub A, so that one part of the hot water supply is The work of supplying hot water into the bathtub A is carried out smoothly and quickly without the water flowing backward in the hopper 3. <Effects> Since the automatic hot water supply device for bathtubs according to the present invention has the above-described configuration, the hot water heated by the automatic water heater is dropped into the bathtub from the hopper via the automatic hot water supply pipe via the circulation fitting. Even if the head difference in water level gradually decreases due to water buildup, when the circulation pump is operated, at least a part of the hot water dropped from the hopper is directly sucked into the pump from the return pipe opened near the hopper. , the inconvenience of overflowing from the top of the hopper is completely prevented. Moreover, since the high-speed return hot water discharged by the pump flows through the outgoing pipe and is sent from the top of the circulation fitting, it attracts and joins the remainder of the hot water that is dropped from the hopper into the same circulation fitting. Since hot water is rapidly introduced into the bathtub, the hot water supply operation can be performed more quickly and smoothly, and a remarkable effect can be exhibited. The inventors of the present invention have compiled the results of comparing the performance of the conventional device and the device of the present invention through experiments, and the results are listed in Table 1 on the next page. In other words, it is clear that the amount of hot water supplied increases by about 30%. It goes without saying that the present invention is not limited to the above-mentioned embodiments, but may be modified as appropriate without departing from the gist thereof. 【table】

[Brief explanation of the drawing]

FIG. 1 is a diagram of an automatic hot water supply device for a bathtub according to the present invention installed in a bathtub. 1: Automatic water heater, 2: Automatic hot water pipe, 3: Hopper, 4: Circulation fitting, 5: Return pipe, 6: Circulation pump, 7: Outgoing pipe.

Claims (1)

[Scope of utility model registration request] An automatic hot water supply device for a bathtub in which hot water from an automatic water heater to a hopper via an automatic hot water supply pipe is sent into the bathtub via a supply/discharge circulation fitting installed at the bottom of the bathtub, The lower end of the hopper is connected to the outer surface of the circulation fitting, and
One end of a return pipe is connected to a portion of the circulation fitting near the connection port of the hopper, and at least a portion of the hot water dropped from the hopper into the circulation fitting is sucked into the return pipe and returned to the circulation pump, An automatic hot water supply device for a bathtub, characterized in that the returned hot water is fed into the bathtub by being sent into a portion of the circulation fitting near the bathtub via an outgoing pipe.