JPH0332938Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a heat exchange device for a bath.

(Prior Art) Conventional bath heat exchange devices include a natural circulation type and a pump-based forced circulation type.

(Problems to be solved by the invention) The natural circulation type described above does not have good thermal efficiency because of natural circulation, and the forced circulation type using a pump improves thermal efficiency because the amount of circulation increases. If the circulation pump were to malfunction, there was a problem in that the bath heat exchange device itself would become unusable. Therefore, a device that can be used for both natural circulation and forced circulation is required, and at the same time, it is also required that this can be done smoothly without any hindrance caused by hair or the like.

(Means for solving the problem) The following means are necessary to solve the above problem. That is, in the present invention, upper and lower hot water circulation passages are opened in the heat exchanger side water wall, and an impeller and an impeller are installed in the heat exchanger side water wall at a position corresponding to the lower hot water circulation passage in the hot water circulation passage. A hot water guide plate is built into the upper part of the impeller, and the impeller has short blades, and a hair blowing part is formed on the periphery of a flange portion to which the blades are attached, and The height decreases toward the outer tip, and the upper and lower hot water circulation passages are connected to a bathtub, respectively.

(Function) By the rotation of the impeller installed in the water wall on the heat exchanger side, hot water from the bathtub (not shown) flows through the lower hot water circulation passage and the upper hot water circulation passage into the water wall on the heat exchanger side. The hot water circulates while being guided by the installed hot water guide board. Such circulation increases the amount of circulation and improves thermal efficiency, but even if a failure occurs in the impeller or motor, the impeller is built into the side wall of the heat exchanger instead of in the hot water circulation passage. Because it is installed in the tank, it does not interfere with the natural circulation of hot water and does not affect the heating of hot water. Further, since the impeller constitutes a part for blowing off hair and the like, and the blades are made lower toward the outer tip, hair does not adhere to the impeller as well.

(Example) Reference numeral 1 is a heat exchanger, and 2 is a water wall on the side of the heat exchanger. Upper and lower hot water circulation passages 3 and 4 are opened in this heat exchanger side water wall 2, and in the heat exchanger side water wall 2 at a position corresponding to the lower hot water circulation passage 4 among the hot water circulation passages, An impeller 6 with blades 5 attached thereto, and a hot water guide plate 7 built into the upper part of the impeller 6,
A hair blowing part 12 is formed on the periphery of the flange part 11 to which the blade 5 is attached, and the height of the blade 5 decreases toward the outer tip, and the upper hot water The circulation passage 3 and the lower hot water circulation passage 4 are each connected to a bathtub. In FIG. 1, a heat exchanger side water wall 2 is configured with an extension part 8 in the lateral direction, and upper and lower hot water circulation passages 3 and 4 are opened in the extended heat exchanger side water wall 2, and the lower part It has a structure in which an impeller 6 and a hot water guide plate 7 are built into the heat exchanger side water wall 2 corresponding to the hot water circulation passage 4, and the one shown in FIG. 2 is different from the one shown in FIG. An example in which the extension portion 8 is not included is shown. When the impeller 6 is rotated by the motor 9, the hot water in the bathtub is forcibly circulated within the bathtub and the heat exchanger 1 by the impeller 6. That is, the hot water passes through the lower hot water circulation passage 4 and reaches the water wall 2 on the heat exchanger side.
It reaches the impeller 6 built into the impeller 6, and is guided by the hot water guide plate 7 located above it to reach the upper hot water circulation passage 3. In the case of the embodiment shown in FIG. 1, since the extension part 8 is configured, a part of the hot water guided by the hot water guide plate 7 is transferred to the main body side hot water circulation passage 10 as indicated by the arrow in the figure. It flows laterally to exchange heat, and is led to the upper hot water circulation passage 3 and circulated to the bathtub. In the case of Fig. 1, the other part of the hot water is bypassed by the hot water guide plate 7 to the upper hot water circulation passage 3 as indicated by the arrow in the figure, so the hot water with a lower temperature in the lower part of the bathtub is diverted from the bathtub. This results in direct circulation to the top, promoting even temperature distribution within the bathtub. Thus, the hot water guided by the hot water guide plate 7 is circulated through the upper hot water circulation passage 3 to the bathtub. At this time, if the hair is stuck to the blade 5, the hair reaches the tip of the blade 5 due to centrifugal force and is blown away to the hair blowing section 12. In addition, as shown in the figure, the height of the blade 5 is made lower as it goes toward the outer tip, so even if hair sticks to the blade 5, it will be blown away by the time it reaches the tip, and it will be easily removed from the tip. It doesn't reach that point. As a result, forced circulation and natural circulation are carried out smoothly.

(Effect of the invention) As mentioned above, this invention does not use a hot water circulation passage,
Since the impeller and the hot water guide plate are built into the water wall on the heat exchanger side, even if the impeller does not rotate due to a failure of the motor or other reasons, the natural circulation of hot water will continue. It can be done without any consequences. In addition, it has the great advantage of converting the heat exchanger itself into a pump, which has not been seen before, and it not only saves space, but also eliminates the need for connections such as pipes and eliminates the concept of water leakage. In addition, the unique structure of the impeller allows for forced circulation without hair growth.
It has the advantage of allowing natural circulation to occur without any hindrance.

[Brief explanation of drawings]

1 and 2 are illustrations of an embodiment of the present invention, FIG. 3 is a cross-sectional explanatory view showing how the impeller is attached, and FIG. 4 is an explanatory view of the impeller. Code 1... Heat exchanger, 2... Heat exchanger side water wall,
3... Upper hot water circulation passage, 4... Lower hot water circulation passage, 5... Rear curved blade, 6... Impeller, 7...
...Hot water guide plate, 8...Extension part, 9...Motor, 1
0... Main body side hot water circulation passage, 11... Flange section, 12... Hair blowing section.

Claims (1)

[Scope of utility model registration request] Upper and lower hot water circulation passages are opened in the heat exchanger side water wall, and an impeller and an upper position of the impeller are provided in the heat exchanger side water wall at a position corresponding to the lower hot water circulation passage among the hot water circulation passages. Each of the impellers has a built-in hot water guide plate, and the impeller has short blades, and a hair blowing part is formed on the periphery of a flange portion to which the blades are attached, and the blades have short blades as they move toward the outer tip. The heat exchange device for a bath has a low height, and the upper and lower hot water circulation passages are respectively connected to a bathtub.