JPH0714766Y2 - Heat exchanger for bath kettle - Google Patents

Description

[Detailed Description of the Invention] [Field of Use and Outline of the Invention] The present invention relates to a bathtub heat exchanger, in which water pipes for connecting the heat exchanger and the bathtub are arranged vertically close to each other. In this type of heat exchanger, by simplifying the structure and reducing the degree of processing of the body of the heat exchanger, internal stress is less likely to occur even if a low-plasticity material such as a stainless steel plate is used. In this way, the main joint of the body of the heat exchanger can be manufactured by seam welding.

[Prior Art and its Problems] There are two types of heat exchangers for bath baths, depending on the form of the bath bath. One of them has a structure in which water pipes (11) (11), which are connecting parts to a bathtub, are arranged at regular intervals vertically and horizontally as shown in FIG. 7. This is a jacket. (J) A large number of heat absorbing fins (F) (F) between (J)
A heat exchanger of this type is constructed by connecting the heat pipes provided with the water pipes (11) and (11) so that the water pipes (11) and (11) project from the jackets (J) and (J).

The other one is a water pipe (11) as shown in FIGS. 8 and 9.
By arranging (11) in the vertical direction only at regular intervals, it is possible to move convectively so that cold water flowing from the lower water pipe (11) reaches the upper water pipe (11) through the heat absorbing pipe. Therefore, it is required that the portion corresponding to the jacket (J) (J) is in communication with the lower portion and the upper portion thereof. Therefore, normally, as shown in FIG. 9, the constituent wall of the tubular body (1) having a rectangular cross section is made hollow, and the constituent wall surfaces are provided with a large number of heat absorbing fins (F) (F). The plurality of heat absorbing tubes (12) (12) provided are connected to each other.

In this latter type, since the water pipes (11) (11) have a fixed interval only in the vertical direction, connection to the bathtub is easier than in the former type, and There are few restrictions on installation conditions. However, in this case, the configuration of the body portion (1) is complicated, particularly the degree of processing of the members forming the body portion (1) is large, and it is difficult to secure the airtightness of the joint portion of the component members. .

The former one (Fig. 7) is jacket (J) (J)
It is only necessary to manufacture the half body of the member that is formed by drawing, and to join it to the flat plate to which the heat absorption tubes (12) and (12) are to be connected in an airtight state at the peripheral edge, and it is easy to ensure the airtightness of this joint. is there. Further, the drawing depth of the half body of the component member of the jacket (J) can be small.

However, in the latter, it is necessary to draw both the inner wall portion (1a) and the outer wall portion (1b) forming the body portion (1) in the height direction of the body portion. The drawing depth is significantly larger than that of the former one. Further, the joint portion between the inner wall portion (1a) and the outer wall portion (1b) extends over the entire circumference of both upper and lower ends, and the joining work of this is troublesome.

In particular, the inner wall (1a) and the outer wall (1b) are fitted on the same axis, so if the precision of this part is insufficient, a gap may occur at the joint between both ends. Therefore, highly accurate welding is required to secure the airtightness of the joint.

The present invention is such an “inner wall (1a) and outer wall (1b)
The body part (1) is configured so that the hollow chamber formed by joining the and the heat sink tube (12) (12) surrounds the body part (1), and the outer wall part (1b) of the body part (1) forms a pair of water pipes ( 11) A heat exchanger for a bath kettle of a type in which (11) is projected and the water pipes (11) are arranged at a substantially same position in the vertical direction with a certain space therebetween.
The inner wall part (1a) and the outer wall part (1b) can be manufactured under conditions where the degree of processing is small, and the joints can be surely brought into close contact with each other, so that the airtightness of the joints can be ensured by a simple structure. This is an issue.

[Technical Means] The technical means of the present invention taken to solve the above problem is that "the body (1) has a U-shaped planar shape and the inner wall (1a) of the body (1) is ) Around the flange (13)
Is a bulging portion (14) protruding toward the inner peripheral side of the U-shape, and the area surrounded by the flange portion is a bulging portion (15) with the other outer wall portion (1b) as a peripheral edge. The area surrounded by the flange portion is the bulging portion (16) protruding toward the outer peripheral side of the U-shape, and the flange portion (13)
(15) Welded by facing each other '.

[Operation] The technical means of the present invention operates as follows.

The inner wall portion (1a) and the outer wall portion (1b) have a strip shape having a width corresponding to the vertical height of the body portion (1) and a length corresponding to the U-shaped expanded length of the body portion (1). The body is bent into a U shape, and the inner wall (1a) and the outer wall (1b) are bulged (14).
The amount of protrusion of (16) is about half the distance between the opposing walls of the hollow part of the body (1). Therefore, the degree of processing of the inner wall portion (1a) and the outer wall portion (1b) is significantly larger than that of the conventional type in which the cylindrical inner wall portion (1a) and the outer wall portion (1b) are fitted concentrically. Less.

Further, since the inner wall portion (1a) and the outer wall portion (1b) having a U-shaped plane are overlapped with each other and the flange portion (13) and the flange portion (15) are welded to each other, the U-shaped opposing sides are formed. As long as the distance between them is proper, the flange portions (13, 15) will surely contact each other. That is, there are few parts where dimensional accuracy should be secured.

Further, the heat absorbing pipes (12) (12) are arranged so as to communicate with each other between the hollow facing walls of the body portion (1), in which both end portions of the heat absorbing pipes (12) (12) are connected to the inner wall portion. It is fitted and welded to the fitting opening formed in (1a). At this time, the heat absorption pipes (12) and (12) can be fitted and welded in the state of the inner wall portion (1a) alone.

[Effects] The present invention having the above-described configuration has the following unique effects.

Since the inner wall portion (1a) and the outer wall portion (1b) have a low degree of processing, they can be made of a poorly processed material such as stainless steel. In addition, since the portion that requires precision in order to securely adhere the joint portion between the inner wall portion (1a) and the outer wall portion (1b) is smaller than the conventional one, the inner wall portion (1a) and the outer wall portion (1b) are ) Is easy to ensure airtightness. Furthermore, since the abutting portions of the flange portions (13, 15) forming the U-shaped curved surface are welded portions, this portion can be welded by seam welding. With this welding method, welding work for ensuring airtightness is particularly easy.

Since the heat absorbing pipes (12) and (12) are assembled to the body portion (1) that is bent in a U shape, the heat absorbing pipes (12) and (12) are easier to assemble than the conventional one.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

In the bathtub heat exchanger of this embodiment, as shown in FIG. 2, the body portion (1) has an intermediate upright wall (10) and extended upright walls (17) (18) extending from both ends thereof. ) And one extended upright wall (17) and the other extended upright wall (18)
Protruding longer than. And this extended upright wall (1
A pair of upper and lower water pipes (11) and (11) are arranged at the tip of 7), and these water pipes are connected by a short circuit via a pump (P). Therefore, in relation to the bathtub (B), as shown in FIG. 4, the water pipe (11) below the bathtub (B) and the water pipe (11) bathtub (B) above the heat exchanger.
A part of the circulation circuit is connected in a short circuit by the circuit via the pump (P), and this pump (P) promotes the circulation between the heat exchanger and the bath (B).

The short circuit is shown in FIG.
1) a discharge pipe (21) having a relatively small diameter that penetrates in a position eccentric to the water pipe, a suction pipe (22) that penetrates in an eccentric position with respect to the lower water pipe (11), and this (21) (22) and a pump (P) inserted between them. In this heat exchanger, the discharge pipe (21) and the suction pipe (22) are attached to the body (1) in advance.

Next, a plurality of heat absorbing tubes (1) having heat absorbing fins (F) (F) between the extended upright wall (17) and the extended upright wall (18).
2) (12) is provided, and both ends of the heat absorbing tube (12) are fitted into the openings of the wall surface of the bulging portion (14) of the inner wall portion (1a) as shown in FIG. The hollow portions (K) and (K) constituted by the bulging portion (14) of the inner wall portion (1a) and the bulging portion (16) of the outer wall portion (1b) are connected for communication. The heat absorption pipes (12) (12) are installed in an inclined state so as to descend from an extended upright wall (17) having water pipes (11) (11) toward an extended upright wall (18) facing the extended upright wall (17). Therefore, the fitting portions of the bulging portions (14) and (16) and the heat absorbing tube (12) partially project in a manner having an inclined surface.

The tip of the extended upright wall (18) and the portion of the extended upright wall (17) facing the extended upright wall (18) are communicatively connected by a flat communicating pipe (19) as shown in FIG. Therefore, at positions corresponding to both ends of the communication pipe (19), through holes corresponding to the cross-sectional shape of the communication pipe (19) form an extended upright wall (17) and an extended upright wall (18). It is opened in the bulge (14) of section (1a).

In the heat exchanger having the above-described structure, first, the inner wall portion (1a) and the outer wall portion (1b) are drawn into a developed state to form a plate-shaped semi-processed member as shown in FIG. The inner wall portion (1a) and the outer wall portion (1b) are formed by bending in a U shape.

As shown in FIG. 6, the inner wall portion (1a) and the outer wall portion (1b) are overlapped with each other to form the body portion (1) by the inner wall portion (1a) and the outer wall portion (1b). (13) When the overlapped portion of (15) is seam welded, a flat U-shaped body (1) is produced, and the periphery of the hollow portion (K) formed in the constituent wall of the body is welded in an airtight state. It has been done. still,
In order to facilitate this seam welding, the flange portion at the tip of the extended upright wall (18) may be inclined outward as shown in the same figure. Further, as shown in FIG. 6, the curvature radius of the bent portion of the flange portion (13) (15) of the body portion (1) in the plan view is set to be larger than that of the seam welding electrode (R). is there.

After this welding or prior to the welding, the heat absorbing tubes (12) (12) are partially fitted between the inner peripheral surfaces of the inner wall portion (1a) so that both ends thereof project into the hollow portion (K). In the same manner, the communication pipe (19) is attached between the tip of the extended upright wall (18) and the vicinity of the tip of the extended upright wall (17) in the same manner, and further, the discharge pipe (21) and the suction pipe (22). ) Is attached and the water pipes (11) and (11) are attached to the outer wall portion (1b), a heat exchanger of the type in which the water pipes (11) and (11) are short-circuited is completed. Needless to say, brazing or other means for ensuring airtightness is adopted in the fitting portions of the heat absorbing pipe (12), the communicating pipe (19), the discharge pipe (21) and the like.

The upper and lower flange joints at the tip of the extended upright wall (18) and the flange joints facing the extended upright wall (17) are connected to each other by reinforcing bars (3) (3). This is to prevent the tip end portions of the body portion (1) from spreading.

[Brief description of drawings]

1 is a sectional view of an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, FIG. 4 is a partially cutaway side view, and FIG. 5 is an exploded view of a trunk. Fig. 6 is an explanatory view of seam welding, and Figs. 7 to 9 are explanatory views of a conventional example. In the figure, (1a) ... inner wall portion (1b) ... outer wall portion (12) ... endothermic tube (1) …… Body part (11) (11) …… Water pipe (13) (15) …… Flange part (14) (16) …… Bulging part

Claims (2)

[Scope of utility model registration request] 1. A body part (1) is constructed so that a hollow chamber formed by joining an inner wall part (1a) and an outer wall part (1b) surrounds a heat absorbing tube (12) (12). Bath of a type in which a pair of water pipes (11) and (11) are projected from the outer wall portion (1b) of the portion (1), and the water pipes (11) are arranged at substantially the same position in the vertical direction at regular intervals. In the heat exchanger for a kettle, the body (1) has a U-shaped planar shape, and the flange (13) is extended around the inner wall (1a) of the body (1) as a periphery. The area surrounded by the flange is U
A bulging portion (14) protruding toward the inner peripheral side of the letter U shape, a flange portion (15) extending over the other outer wall portion (1b) as a peripheral edge, and a range surrounded by the flange portion is the U-shaped portion. The bulging portion (16) protruding to the outer peripheral side is provided, and the flange portion (13) (1
5) A bath heater heat exchanger that is welded by facing each other. 2. The heat exchanger for a bathtub according to claim 1, wherein the vicinity of the tip of the U-shaped flat body (1) is connected by a communication pipe (19).