JPS6189491A - Heat exchange type blower - Google Patents

Abstract

PURPOSE:To reduce the blasting loss and to efficiently perform the heat exchange by forming the blade portion of an impeller into a corrugated shape having radial grooves forming blast paths on both surfaces, and forming the grooves on both surfaces of the blade portion so that air flows through grooves on both surfaces in a manner adjacent to each other. CONSTITUTION:Suction ports 9 and 10, exhaust ports 11 and 12 and a partitioning plate 14 of air currents 7 and 8 flowing into both surfaces of an impeller, separate the air currents 7 and 8. In this case, when the impeller is rotated around a rotary shaft 15, two kinds of air currents 7 and 8 sucked up in the vicinity of the center of both surfaces of the impeller flow in an adjacent manner through grooves 2a and 2b on both surfaces of the impeller portion. As a result, the air currents are subjected to heat exchange by the heat conduction of the blade portion 2, and thereafter sent out through exhaust ports 11 and 12. Thus, since air which has flowed into the grooves 2a and 2b on both surfaces of the blade portion 2, flows along the wall surfaces of grooves on both surface without generating a dead space, the heat exchange surface can be utilized effectively and the blast loss is small, thus the heat exchange is efficiently performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention 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 completely closed. It is known (Japanese Patent Publication No. 30-4092). 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, the air flow rate is also significantly reduced, and a large dead space is created inside the blade where the outer periphery is closed, reducing the heat exchange area on both sides of the blade. It is difficult to utilize the heat efficiently and the heat exchange efficiency decreases. In addition, since both the air suction and air discharge are in the axial direction, the two flows, the suction and the discharge, are likely to mix and flow, which may adversely affect the heat exchange effect by 57 fK.

Problems to be Solved by the Invention The present invention solves all of these conventional problems.
A heat exchange blower that allows air to flow smoothly from the inside to the outside on both sides of the blade, reducing air loss such as air volume loss and pressure loss, and eliminating dead space on the inner and outer periphery of the blade to improve heat exchange efficiency. This is what we provide.

Means to Solve All Problems For this purpose, the heat exchange type blower of the present invention is equipped with an impeller that has a blowing function on both sides and also has a heat exchange function between the air flowing on both sides. An inner supporting part to be fixed, a blade part on the outer periphery thereof, and a metal part with the outer supporting part on the outer periphery, and the blade part has a wave shape with radial grooves on both sides that serve as air passages, and the blade part The inner support part is formed on a surface including one waveform peak in the thickness direction, and at the same time, the outer support part is entirely formed on a surface including the other waveform peak, and grooves are formed from the inner support part and the outer support part. The other waveform crest at the inner and outer ends of the The inner end portion has a shape that slopes outward from the inner support portion.

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

Example An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 mainly shows the impeller part of a 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 11 that fixes the impeller to the rotating shaft! The inner support part 2 with L is a blade part on the outer periphery of the inner support part 1, and is made of a thin plate capable of heat exchange, such as a metal plate, and has radial grooves 2a on both sides that serve as air passages. It has a wavy shape with 2b.

Reference numeral 3 denotes an outer support portion on the outer periphery of the blade portion 2, which is generally ring-shaped. 4 indicates the direction of rotation of the impeller.

Fig. 2 shows a radial cross-section of the impeller shown in Fig. 1, and 5 and 6 are grooves 24 and 2b of the blade portion 2 so that the air flows flowing on both sides of the impeller do not mix.
They are an inner closed part and an outer closed part, which are closed with slopes on the inside and outside.

These inner and outer closing portions 5.6 are located in the inner and outer thickness directions of the blade portion 2, and are arranged in the inner support portion 1 described above.
and the groove 2 from both branch parts 1.3 with the outer support part 3 as a border.
The portions of the inner and outer circumferential ends of a and 2b up to the waveform apex 2C are closed with an inclination.

Figure 3 is an explanatory diagram of the impeller viewed from the outer circumferential side of the impeller.
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. The impeller as a whole has the shape shown in FIG. 1.

The impeller 2 having the above configuration has an air flow 7 flowing on one side thereof.
and the air flow 8 flowing on the other surface are completely separated without mixing and discharged toward the outer circumference of the impeller. Here, if there is a temperature difference between airflows A and 8, heat exchange is mainly performed in the blade portions 2.

Figure 4 shows a blower containing both sides of the impeller, 9
．． 10 is the inlet of each air flow 7.8 of class II (2) flowing into both sides of the impeller, 11.12 is the rain air flow 7
, 8, 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, which is fixed to the boss portion 1a.

In the configuration shown in FIG. 4, when the impeller 2 is rotated, two types of air flows 7.8 sucked into the center of both sides of the impeller flow into the grooves 2a and 2bi adjacent to each other on both sides of the blade part 2. After exchanging heat through heat conduction, the gas is discharged from the discharge ports 11 and 12 in the outer circumferential direction.

゛ As mentioned above, the air that has flowed into the grooves 2a and 2b flows along the wall surfaces of the grooves on both sides without creating a dead space, so not only can the heat exchange surface be used effectively,
Heat exchange can be performed efficiently with little air loss.

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 corrugated shape having radial grooves on both sides that serve as air passages, and In the thickness direction, the approximately triangular portion from the inner support portion and the outer support portion to the corrugated top of the wall portion on the inner and outer periphery of the groove is made into a closed shape, and furthermore, this closed surface is sloped along the flow. Therefore, the air that is relatively smoothly sucked in near the center of both sides of the impeller flows through the grooves on both sides of the impeller, exchanging heat, and then being smoothly discharged toward the outer circumference along the walls of the grooves. 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 groove are sloped along the flow, there is no dead space in the flow unlike in the conventional case, and this has a great effect on heat exchange performance. Also, from the perspective of air flow, the suction
There is little chance of mixed flow between the inlet air and the exhaust air, and the heat exchange efficiency is extremely high.

[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. Fourth
The figure is a sectional view of a heat exchange type blower showing an embodiment of the present invention. 1...Inner support part, 2...Blade part, 2
N. 2b...groove, 2C...corrugated top, 3.
...Outer support part, 7.8... Air flow.

Claims (1)

[Claims] The impeller has an air blowing function on both sides and also has a heat exchange function between the air flowing on both sides. 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. , at the same time forming an outer support part with a surface including the other waveform crest, and a substantially triangular shape extending from the inner support part and the outer support part to the other waveform crest at the inner and outer ends of the groove. At the same time as closing the part, at the outer end,
This heat exchange type blower has a shape in which the closed surface is inclined inward from the outer support part and outward from the inner support part at the inner end.