JPH023904B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an extruded aluminum heat exchanger for FF hot air fans and the like.

Conventional structure and its problems When the heat exchanger of a conventional FF hot air fan is made of an extruded aluminum product, installation to the combustion tube and connectors is done using an extruded aluminum product as shown in Figures 5 to 8. Both ends 20a and 20b of the heat exchanger main body 20 are inserted into a combustion tube (not shown) and a connector 21 and fixed by caulking 22a or welding 22b. In this case, both ends 20a of the heat exchanger main body 20 ,20
It is necessary to remove the fins 22 by cutting b, which increases the number of processing steps, and if both ends are caulked 22a, cracks at the caulked portions and welding 22
In case b, there were problems such as the occurrence of pinholes in the welded parts.

Purpose of invention The present invention increases productivity.

Composition of the Invention In order to achieve the above object, the present invention provides heat radiation fins of an aluminum extrusion molded heat exchanger or a slit with a part opened in the same direction as the extrusion molding direction between the heat radiation fins. It is designed so that it can be fixed to the connector or connector using screws or the like without caulking or welding.

DESCRIPTION OF EMBODIMENTS Hereinafter, the embodiment will be described using FIGS. 1 to 4, taking as an example a case where the embodiment is used as a heat exchanger for an FF warm air fan. In FIG. 1, 1 is the main body of the hot air blower, 2 is an oil pipe that supplies oil from an oil tank (not shown) to the burner section 3, and 4 is a combustion tube for burning the kerosene vaporized in the burner section 3; 5 is a heat exchanger, 6 is an exhaust pipe for guiding the combustion exhaust gas to the outside of the appliance, 7 is a connecting body for guiding the combustion exhaust gas heat-exchanged in the heat exchanger 5 to the exhaust pipe 6, and 8 is the above-mentioned heat This is a connector for connecting the exchanger 5 and the exhaust pipe 6.

The heat exchanger 5 consists of a cylindrical heat exchanger 5a and radial heat radiation fins 5b provided on both the inside and outside surfaces of the heat exchanger 5a.The heat exchanger main body 5a and the heat radiation fins 5b are simultaneously molded by aluminum extrusion molding. be.
Slits 5c having a substantially circular cross section are formed at several locations between the radiation fins 5b of the heat exchanger body 5a in the same direction as the extrusion direction.

In the above configuration, the heat exchanger 5 and the connector 8 are attached by placing the connector 8 so as to abut the end opening seal gasket 9 of the heat exchanger body 5a and sandwiching the seal gasket 9, and then tighten the screw 10 for heat exchange. Vessel body 5a
This is completed by tightening the approximately circular slit 5c. Although the screw 10 is used in this embodiment to attach the connector 8, this is just a pin and may be press-fitted into the slit 5c; any type of fastener may be used. It's good to have it. Similarly, the case of the connector 8 was explained as being attached to the heat exchanger main body 5a, but
This can be anything. Further, in the above embodiment, the slits 5c are provided between the heat radiation fins 5b, but they may be provided on the fins themselves, or they may be provided on the outside of the heat exchanger body 5a. It may also be provided inside. However, if the combustion gas passes through the heat exchanger body 5a as in this embodiment, fasteners such as screws may be corroded by the combustion gas, so they should not be provided outside the heat exchanger body 5a. is preferred.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, it is possible to eliminate the cutting process for removing the heat radiation fins of the heat exchanger body, and also to simplify the mounting method. Cracks caused by pinholes and caulked parts can also be prevented. Furthermore, the slits can be formed at the same time as the extrusion molding of the heat exchanger, improving productivity, and the die structure of the mold is simple because only one hole, or one core, is required. , production costs can be reduced, leading to cost reductions.
In addition, since the mounting fasteners are installed in the openings at both ends of the heat exchanger body, and the partially opened slits have a roughly circular cross section, each mounting fastener is attached to the slit, so that a single long mounting bolt extends from one end of the heat exchanger body to the other. Compared to those that use fasteners, even if the heat exchanger body changes dimensions due to expansion and contraction in the longitudinal direction (extrusion direction), the lid and other members can move freely according to the heat exchanger, so there is no thermal distortion. Airtightness can be maintained without any undue stress being applied, and without creating any gaps between the parts and the mounting surface.

[Brief explanation of drawings]

Fig. 1 is a half-cut front view of an FF warm air fan using a heat exchanger according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main parts, Fig. 3 is a side view of the heat exchanger body, and Fig. 3 is a side view of the main body of the heat exchanger. Figure 4 is a plan view of the same, Figure 5 is a side view of the conventional heat exchanger main body, Figure 6 is a plan view of the same, Figures 7 and 8.
The figure is a sectional view showing how the conventional heat exchanger main body and connector are attached. 5a... Heat exchanger body, 5b... Heat radiation fin,
5c...slit, 10... fastener (screw).

[Claims]

1 A compressor connected to a high-pressure hose and a low-pressure hose, a condenser connected to the compressor via the high-pressure hose, and a condenser connected to the condenser via a liquid tank and an expansion valve, and a compressor connected to the compressor via the low-pressure hose. In a cooler cycle consisting of a connected evaporator, a high pressure hose and a low pressure hose are connected to a compressor via a switching valve mechanism, an outlet pipe and an inlet pipe connected to the switching valve mechanism, and the switching valve mechanism is connected to a high pressure hose. It is driven into two positions: an operating position in which it connects the low pressure hose and the inlet pipe as well as the low pressure hose and the inlet pipe, and a stop position in which it connects the high pressure hose and the low pressure hose and the outlet pipe and the inlet pipe. and a drive section that switches the pipeline section to the operating position in synchronization with the operation of the compressor, and switches the pipeline section to the stop position in synchronization with the stoppage of the compressor. Cooler cycle of air conditioner.