JPH0531485Y2 - - Google Patents

Description

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

(Prior Art) Conventional heat exchange devices for baths include a natural circulation type and a forced circulation type using a pump.

(Problem to be solved by the invention) In both the natural circulation type and forced circulation type described above, body hair, dirt, etc. circulate through the heat exchanger together with hot water, and the heat exchanger becomes clogged. As a result, the capacity of the heat exchanger may be reduced or, in some cases, a dry-heating phenomenon may occur, and it is necessary to solve these problems. Further, for safe bathing of children and the like, it is required that the hot water in the bathtub has as little temperature difference as possible. Furthermore, in the forced circulation type, body hair or the like may adhere to the impeller and cause it to malfunction, and it is required to prevent this from occurring.

(Means for Solving the Problem) In order to solve the above problem, the present invention extends the side water wall of the heat exchanger in the horizontal direction to form an extended side water wall, and the extended side water wall has a , a hot water sending passage and a hot water sending back passage are respectively opened, and a forward curved impeller is installed in the extension side water wall at a position opposite to the outlet of the hot water sending passage, and the hot water sending passage and the hot water return passage are opened. In the water wall on the extension side between the sending and returning passages,
A hot water guide plate extending in the direction of the heat exchanger and having the same width as the inside of the extended water wall is installed, and the hot water sending passage and the hot water returning passage are each connected to a bathtub. be.

(Function) By the rotation of the impeller provided in the extension side water wall of the side water wall of the heat exchanger, hot water from the bathtub (not shown) is routed through the hot water delivery passage and hot water return via the hot water guide plate. Circulate through the aisles. At this time, some of the hot water is
A short pass is carried out by the extended side water wall and the hot water guide plate, and body hair, dirt, etc. are circulated along with this short pass flow, and do not flow toward the heat exchanger. In other words, the flow of hot water that is forced to convect on the extended water wall side (short pass flow) has a faster flow rate than the flow of hot water that naturally convects on the heat exchanger side, and body hair, dirt, etc. It does not flow in the direction of the vessel. At the same time, since this short pass flow does not pass through a heat exchanger, its temperature is low and the hot water temperature distribution within the bathtub is made uniform. As described above, natural convection occurs in the heat exchanger, and the hot water heated by this natural convection joins the hot water of the short pass flow and flows into the bathtub. In the present invention, a front curved impeller is installed at a position opposite to the outlet of the hot water return passage, so that a motor with a small capacity can perform these functions. Further, even if a failure occurs in the motor or the like, the front curved impeller will continue to circulate naturally due to the above-described structure, and there will be no problem in bathing. Furthermore, even if body hair, etc. adheres to the front curved impeller, when the front curved impeller is rotated, countless vortices are created near the blades, and these countless vortices prevent body hair, etc. from getting onto the blades. Adhesion can be prevented.

(Example) In FIG. 1, reference numeral 1 is a heat exchanger,
2 is a side water wall of the heat exchanger. The side water wall 2 of this heat exchanger is extended laterally to form an extended side water wall 8. The extended side water wall 8 has a hot water sending passage 3 and a hot water return passage 4 opened therein, and a front curved portion is formed in the extended side water wall 8 at a position opposite to the outlet portion 11 of the hot water sending passage 4. The impeller 6 is installed. A hot water guide plate 7 extending in the direction of the heat exchanger 1 and having the same width as the inside of the extended water wall 8 is provided in the extended water wall 8 between the hot water sending passage 3 and the hot water return passage 4. The hot water delivery passage 3 and the hot water return passage 4 are each connected to a bathtub.

As a result, the rotation of the front curved impeller 6 provided on the extended water wall 8 of the heat exchanger 1 causes hot water from the bathtub (not shown) to flow through the hot water delivery passage 3 and through the hot water guide plate 7. The hot water is circulated through the hot water return passage 4. At this time, a part of the hot water is short-passed by the extended side water wall 8 and the hot water guide plate 7, and body hair, dirt, etc. are circulated along with this short-pass flow, and flow in the direction of the heat exchanger 1. do not have. In other words, the flow of hot water that is forced to convect through the extension side water wall 8 (short pass flow) is stronger than the flow of hot water that is naturally convecting through the heat exchanger 1.
The flow velocity is faster in this case, and body hair, dirt, etc. do not flow toward the heat exchanger 1. At the same time, this short pass flow does not pass through the heat exchanger 1, so its temperature is low.
Equalizes the hot water temperature distribution in the bathtub. heat exchanger 1
As mentioned above, natural convection takes place, and the hot water heated by this natural convection merges with the hot water of the short pass flow and flows into the bathtub. In the present invention, the forward curved impeller 6 is installed on the extended water wall 8, so that a small motor 9 can be used to carry out these functions. Further, even if a failure occurs in the motor 9 or the like, since the front curved impeller 6 is installed within the extended water wall 2, natural circulation will occur and there will be no problem in bathing.
Furthermore, even if body hair or the like adheres to the front curved impeller 6, when the front curved impeller 6 is rotated, the blades 5
Countless eddy currents are generated near the blades 5, and body hair and the like are blown away by the countless vortex flows, thereby preventing body hair and the like from adhering to the blades 5.

(Effects of the invention) Since the present invention is as described above, it is possible to prevent body hair, dirt, etc. from circulating toward the heat exchanger, and to equalize the temperature of the hot water in the bathtub, using a small-capacity pump. By rotating the front curved impeller, there are various effects such as being able to prevent body hair from adhering to the blades.

[Brief explanation of the drawing]

FIG. 1 is an embodiment of the present invention, FIG. 2 is a sectional explanatory view showing how the impeller is attached, and FIGS. 3A and 3B are explanatory views of the impeller. Code 1... Heat exchanger, 2... Heat exchanger side water wall,
3...Hot water sending passage, 4...Hot water sending back passage, 5...
...Blade, 6... Impeller, 7... Hot water guide plate, 8...
... Extension side water wall, 9 ... Motor, 10 ... Hot water circulation passage on the heat exchanger side, 11 ... Outlet section.

Claims (1)

[Scope of utility model registration request] The side water wall of the heat exchanger is laterally extended to form an extension side water wall, and a hot water sending passage and a hot water return passage are opened in the extension side water wall, respectively, and a hot water sending passage and a hot water return passage are opened in the extension side water wall. A front curved impeller is installed in the extended side water wall at a position opposite to the outlet part, and a front curved impeller is provided in the extended side water wall between the hot water sending passage and the hot water sending back passage, extending in the direction of the heat exchanger. A heat exchange device for a bath, characterized in that a hot water guide plate having the same width as the inside of the extension side water wall is installed, and the hot water sending passage and the hot water sending back passage are each connected to a bathtub.