JPS58213193A - Heat exchanger - Google Patents

Abstract

PURPOSE:To facilitate mass-production, by a method wherein heat-transmitting pipes with both end formed in a polygonal shape are stacked, and outside peripheral parts of the pipes are fixed by a frame. CONSTITUTION:The heat-transmitting pipes 2 with both ends formed into a hexagonal shape are stacked, and the outside peripheral parts thereof are fixed by the frame 4. Accordingly, since a heat exchanger can be assembled by only stacking the heat-transmitting pipes 2 without need to passing the pipes 2 through holes of tube plates as in a conventiobal case, mass-production of the heat exchanger can be facilitated.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a heat exchanger suitable for household electrical appliances.

[Prior art and its problems]

Conventional heat exchangers used, for example, in laundry dryers, have been of the type D shown in FIG. This heat exchanger has a large number of heat exchanger tubes (2) arranged between tube plates (1), and a high-temperature air inlet (e.g. exhaust from a dryer) and a low-temperature air B (
For example, it exchanges heat with indoor air supplied to a dryer.

When assembling such a heat exchanger, a large number of heat transfer g (2) must be inserted into the holes (3) of the tube plate (1), making it difficult to assemble and low mass production. 74 was not suitable.

[Purpose of the invention]

The object of the present invention is to eliminate these conventional drawbacks, provide a heat exchanger that is extremely easy to assemble, has excellent mass productivity, and is therefore inexpensive.

[Summary of the invention]

The present invention is a heat exchanger constructed by stacking a large number of heat transfer tubes whose ends are pre-molded or whose ends are fitted with molded blocks.

〔Effect of the invention〕

According to the present invention, the assembly of the heat exchanger does not require inserting the heat exchanger tubes into the holes in the tube plate as in the past, and it is only necessary to stack the heat exchanger tubes, making mass production easy. It produces the effect of becoming.

[Embodiments of the invention]

FIG. 2 is an embodiment of the present invention, and FIG. 3 is a side view thereof. A heat exchanger tube formed into a hexagonal shape at both ends (
2) are stacked on top of each other and fixed with the outer periphery of the ft frame (4). Although metal such as aluminum may be used as the material for the heat exchanger tube, plastic is sufficient for household electrical appliances. - As can be seen from Fig. 3, since the ends of the heat exchanger tubes are in close contact with each other, almost airtightness is maintained, but when complete airtightness is required, it is better to use adhesive etc. [Other embodiments of the invention] Example] The heat exchanger tube according to the present invention does not necessarily have molded ends as shown in FIG. 4, but may have molded blocks (5) on both ends as shown in FIGS. It may also be one with a . Further, the shape of both ends is not limited to a hexagonal shape, and the same effect can be obtained with a triangular shape as shown in FIG. 6, or a quadrangular shape.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a conventional heat exchanger, Fig. 2 is an assembled diagram of a heat exchanger according to the present invention, Fig. 3 is a side view of Fig. 2, and Fig. 4 is a diagram showing a heat exchanger according to the present invention. Partial cross-sectional explanatory views showing heat transfer tubes, FIGS. 5 and 6, show other heat transfer bones used in the heat exchanger according to the present invention. It is a partial cross-sectional explanatory view shown. 2. Heat exchanger tube, 4. Frame, 5. Molded block. (7317) Agent: Patent Attorney Noriyuki Chika (
(and 1 other person) Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] (1) An end face is constructed by stacking and bundling a plurality of heat transfer tubes, each of which has a larger outer diameter at both ends than at the center and has a polygonal cross-section at both ends. A heat exchanger characterized in that a frame surrounds a group of heat exchanger tubes and fixes each heat exchanger tube. (2) The heat exchanger according to claim 1, wherein the heat exchanger tube has a circular tube at the center and a polygonal tube at both ends. (3) The heat exchanger according to claim 2, wherein both ends are hexagonal tubes. (41) The heat exchanger according to claim 2, characterized in that both ends are triangular tubes. (6) The heat exchanger according to claim 5, characterized in that the blocks are hexagonal. (7) The heat exchanger according to claim 5, characterized in that the blocks are hexagonal. 6. The heat exchanger according to claim 5, wherein the heat exchanger has a triangular shape.