JPS6134074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchange type blower equipped with an impeller having an air blowing function and a heat exchange function.

Conventional technology Conventionally, the impeller of this type of heat exchange type blower has a wave-shaped blade portion with radial grooves on both sides that serve as air passages, and a structure in which the entire outer periphery of this blade portion is closed. Known (Tokuko 1969-
Publication No. 4092). In this conventional type, the blades have a blowing function and a heat exchange function, but the air flow is sucked in in the axial direction of the impeller, then flows along the blades, and is distributed on both sides of the outer periphery. The flow direction of the blade portion is changed approximately perpendicularly to the flow direction, and the flow is discharged in the axial direction. As the direction of the flow is changed in this way, the pressure loss is large, and the amount of air blown is also significantly reduced. At the same time, a large dead space is created inside the blade where the outer periphery is closed, making the heat exchange area on both sides of the blade effective. It is difficult to utilize and the heat exchange efficiency decreases. In addition, since the air intake and exhaust are both axial, the two flows, suction and exhaust, tend to mix, which may have an adverse effect on the heat exchange function.

Problems to be Solved by the Invention The present invention solves these conventional problems, and allows air to flow smoothly from the inside to the outside on both sides of the blade, thereby reducing air blowing losses such as air volume loss and pressure loss. The present invention provides a heat exchange type blower that improves heat exchange efficiency by reducing dead space on the inner and outer peripheries of the blade portion.

Means for Solving the Problems For this purpose, the heat exchange type blower of the present invention is provided with an impeller that has a blowing function on both sides and also has a heat exchange function between air flowing on both sides,
This impeller has an inner support portion for fixing a rotating shaft, a blade portion on the outer periphery of the inner support portion, and an outer support portion on the outer periphery, and the blade portion has a waveform having radial grooves on both sides serving as an air passage. shape, the inner support portion is formed by a surface including one waveform peak in the thickness direction of the blade portion, and the outer support portion is formed by a surface including the other waveform peak in the thickness direction of the blade portion, and the inner support Closes the approximately triangular portion from the inner end and outer support of the groove to the other corrugated peak at the outer end, and at the outer end, this closed surface faces inward from the outer support. Furthermore, the inner end portion has a shape that is inclined outward from the inner support portion.

Effect With this configuration, as the impeller rotates, air flows from the inner support part side to the outer support part side along the radial grooves of the blade part on one surface of the blade part, and the air flows outside the grooves. Air is discharged effortlessly and smoothly along the surface that closes the end, and on the other surface, air that has obliquely flowed in in the axial direction is discharged directly toward the outer circumference along the groove. In other words, the air on both sides is effectively heat-exchanged in the blades, without creating a dead space at the inner and outer ends of the groove, and with minimal air loss due to changing the direction of the flow toward the outer periphery. It is something that is discharged.

Embodiment An embodiment of the present invention will be described below with reference to the attached drawings. FIG. 1 mainly shows the impeller portion of the blower. This impeller has an air blowing function on both sides and also has a heat exchange function between the air flowing on both sides. In Fig. 1, 1 is a boss portion 1a that fixes the impeller to the rotating shaft.
The inner support part 2 is a blade part on the outer periphery of the inner support part 1, which is made of a thin plate capable of heat exchange, such as a metal plate, and has radial grooves 2a and 2b on both sides that serve as air passages. It has a wavy shape. Reference numeral 3 denotes an outer support portion on the outer periphery of the blade portion 2, which is approximately ring-shaped. 4 indicates the direction of rotation of the impeller.

FIG. 2 shows a radial cross section of the impeller shown in FIG. They are an inner closed part and an outer closed part which are closed with a slope provided on the outside. These inner and outer blocking parts 5 and 6 are formed from grooves 2a and 2b in the inner and outer thickness directions of the blade portion 2, from both the support parts 1 and 3 with the inner support part 1 and the outer support part 3 as boundaries. The portions of the inner and outer peripheries up to the waveform apex 2c are closed with an inclination.

FIG. 3 is an explanatory view of the blade portion viewed from the outer peripheral side of the impeller, and the shaded portion in the figure is the closed portion at the outer end of the groove. The air on one side of the impeller flows behind this closed part, and the air on the other side flows through the groove shown by 2b in the figure. and,
The impeller as a whole has a configuration as shown in FIG.

In the impeller configured as described above, the air flow 7 flowing on one surface and the air flow 8 flowing on the other surface are completely separated without mixing and are discharged toward the outer circumference of the impeller. Here, air flow 7,8
If there is a temperature difference between them, heat exchange will mainly take place in the blade portions 2.

FIG. 4 shows a blower incorporating the above-mentioned impeller, and 9 and 10 are suction ports 11 and 12 for two types of air flows 7 and 8 flowing into both sides of the impeller, respectively.
13 is a casing of the impeller, 14 is a partition plate that separates the air flows 7 and 8 on both sides of the impeller, and 15 is a rotating shaft fixed to the boss portion 1a.

In the configuration shown in FIG. 4, when the impeller is rotated, two types of airflows 7 and 8 sucked in near the center of both sides of the impeller flow through adjacent grooves 2a and 2b on both sides of the blade part 2, respectively. After exchanging heat through heat conduction, the liquid is discharged from discharge ports 11 and 12 in the outer circumferential direction.

The air that has flowed into the grooves 2a and 2b as described above is
Since the air flows along the wall surfaces of the grooves on both sides without creating dead spaces, not only can the heat exchange surface be used effectively, but also the air loss can be reduced and heat exchange can be carried out efficiently.

Effects of the Invention As is clear from the above embodiments, the heat exchange type blower of the present invention is particularly advantageous in that the blade portion of the impeller is formed into a wave shape having radial grooves that serve as air passages on both sides, and In the thickness direction, the approximately triangular portion from the inner support portion and the outer support portion to the waveform apex at the ends of the inner and outer peripheries of the groove is formed into a closed shape, and furthermore, this closed surface has an inclination along the flow. Therefore, the air that is sucked in relatively smoothly near the center of both sides of the impeller flows through the grooves on both sides of the blade part, exchanges heat, and is then smoothly discharged toward the outer periphery along the groove walls. This means that there is little air loss and that heat exchange is carried out efficiently. Furthermore, since the inner and outer ends of the grooves are sloped along the flow, there is no dead space for the flow as in the prior art, and this has great effects in terms of heat exchange performance. Also, from the perspective of air flow, there is less chance of mixing of intake air and exhaust air as in the conventional case.
It has extremely high heat exchange efficiency.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway external perspective view of an impeller portion in an embodiment of the present invention, FIG. 2 is a radial cross-sectional view of the blade portion, and FIG. 3 is an explanatory diagram of the blade portion viewed from the outer circumferential direction. FIG. 4 is a sectional view of a heat exchange type blower showing an embodiment of the present invention. 1...Inner support part, 2...Blade part, 2a, 2
b...groove, 2c...corrugated top, 3...outer support part, 7, 8...air flow.

Claims (1)

[Claims] 1.Equipped with an impeller that has an air blowing function on both sides and also has a heat exchange function between air flowing on both sides, and this impeller consists of an inner support part that fixes the rotating shaft, a blade part on the outer periphery of the inner support part, and an outer support part on the outer periphery of the impeller. and the blade portion has a wavy shape with radial grooves serving as air passages on both sides, and the inner support portion is formed by a surface including one of the wavy peaks in the thickness direction of the blade portion. and at the same time form an outer support part with a surface including the other waveform crest, and approximately from the inner support part and the outer support part to the other waveform crest at the inner end and outer end of the groove. The triangular part is closed, and the closed surface is inclined inward from the outer support at the outer end, and outward from the inner support at the inner end. Replaceable blower.