JPH057636B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention has blades made of corrugated thin plates, each of which has the function of blowing air at different temperatures, and at the same time blows air between air at different temperatures through the blade surface. The present invention relates to a heat exchange type blower that can also perform heat exchange.

Configuration of conventional example and its problems Figure 1 shows the impeller part of a conventional heat exchange type blower, in which 1 is a blade made of a corrugated thin plate made of stainless steel, aluminum, synthetic resin, etc., and 2 is about blade 1 as the center of rotation. 4 is a substantially ring-shaped outer peripheral plate that supports the blade 1 along with the main plate 2 from the outer circumferential direction; A flexible sealing material 5 having a V-shaped cross section is fixed.

FIG. 2 is a schematic cross-sectional view showing two types of air flows in the impeller section, where 6 is a partition plate that separates the two types of air flows, 7 is a high temperature air flow, and 8 is a low temperature air flow. Conventionally, when the impeller is rotated with the above configuration, the blades 1 exchange heat between the airflows 7 and 8, but due to the difference in thermal expansion between the high temperature side and the low temperature side of the blades 1, the blades 1 As a result, the rotational frictional force between the sealing material 5 and the partition plate 6 increases rapidly, resulting in a decrease in the rotational speed. A decrease in the rotational speed causes a decrease in the flow rate of the high temperature air flow 7 and the low temperature air flow 8, which causes the problem of a decrease in heat exchange efficiency. Furthermore, wear of the sealing material 5 was a problem due to increased rotational frictional force.

OBJECTS OF THE INVENTION The present invention solves these conventional problems and provides a heat exchange type blower with improved heat exchange efficiency and durability.

Structure of the Invention The heat exchange type blower of the present invention includes a blade, a main plate, an outer peripheral plate, and a partition plate, and the outer peripheral plate has a V cross section.
This is a ring-shaped sealing material whose length is longer on the low-temperature side than on the high-temperature side, and prevents deformation in the low-temperature direction due to temperature differences in the blade.
This can be corrected by increasing the centrifugal force on the low temperature side of the sealing material, thereby reducing the friction between the sealing material and the partition plate.

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

Figure 4 shows the impeller part of a heat exchange type blower, and 9 is a blade made of a corrugated thin plate made of stainless steel, aluminum, synthetic resin, etc., and 10 is a blade that supports the blade 9 from the center of rotation and fixes the impeller to the rotation shaft. The main plate has a boss 11 for
Reference numeral 12 denotes a substantially ring-shaped peripheral plate that supports the blade 9 along with the main plate 10 from the outer circumferential direction;
has a substantially ring-shaped sealing material 13 with a V-shaped cross section and a substantially ring-shaped sealing material 13 with a substantially radial length longer on the low temperature side than on the high temperature side.
is installed.

FIG. 5 shows a schematic cross-sectional structure of a clothes dryer incorporating the above-mentioned impeller, where 14 is a dryer outer frame, 15 is a dryer outer frame;
16 is a drum rotatably installed within the outer frame 14;
17 is an impeller shown in FIG. 4; and 18 is a rotating shaft for rotating the impeller 17, which is fixed to the boss 11 of the main plate 10.

19 is a casing that encloses the impeller 17 and forms a ventilation passage; 20 is a partition plate that partitions the air flow on both sides of the impeller 17 from the ventilation passage portion; 21 is a duct for guiding hot and humid drying circulating air, and a heater 22 is installed in the middle.
has been established.

Reference numeral 23 indicates a duct for discharging the intake cooling air, and 24 and 25 indicate the flow of drying circulation air and cooling air, respectively. 26 is a drain port for draining dehumidified water to the outside of the machine.

In the above configuration, when the power is turned on and the motor 27 is rotated, and the impeller 17 is rotated by this rotational force, two different air flows occur on both sides of the impeller 17, namely, a circulating air flow 24 and a cooling air flow 25.
occurs. The drying circulating air flow 24 is connected to the heater 22
After being heated in the drum 15,
After heating the clothes inside, it moves along one side of the impeller 17 and returns to the heater 2 through the duct 21.
Flows in two directions.

A cooling air stream 25 is drawn in from outside the aircraft, travels along the other side of the impeller 17 and exits the aircraft again via a duct 26 . And both air streams 24, 25
flows adjacently through the double-sided grooves of the blade 9 with one thin plate sandwiched in between, and at this time, heat is transferred from the high-temperature drying circulating air flow 24 to the low-temperature cooling air flow 25 via the blade 9. The circulating air stream 24 is cooled, and the moisture contained therein condenses into water droplets and is drained from the drain port 26, and the drying circulating air is dehumidified. The dehumidified and drying circulating air flow 24 passes through a ventilation path composed of an impeller 17, a casing 19, and a partition plate 20, passes through a circulation duct 21, and returns to the heater 22, thereby performing a circulation. On the other hand, the cooling air flow 25 is taken in from outside the machine, enters the impeller 17, cools the drying circulating air flow 24, and is exhausted to the outside of the machine through the exhaust duct 23.

By the way, in the above configuration, the sealing material 13 is
As shown in FIG. 6, the approximately radial length of the V-shaped cross section is longer on the low-temperature cooling air flow 25 side than on the high-temperature circulating air flow 24 side (L>
l). As shown in FIG. 7, when the blade 9 is about to deform toward the cooling air flow 25 due to the temperature difference between the circulating air flow 24 and the cooling air flow 25, the length of the sealing material 13 on the cooling air flow 25 side is difference (L-l)
Centrifugal force f acts on the cooling air flow 25 side by that amount to correct the deformation, and the sealing material 13 is located in a neutral position with respect to the partition plate 20 as shown in FIG.
Since the rotational frictional force between the sealing material 13 and the partition plate 20 is reduced, the number of rotations does not decrease.

Effects of the Invention As is clear from the above embodiments, the heat exchange type blower of the present invention has a V-shaped cross section of the sealing material, and the length of the piece is made longer on the low temperature side than on the high temperature side. Deformation toward the low temperature side due to the difference can be corrected by centrifugal force, and the required rotation speed can be maintained without increasing the rotational friction force between the sealing material and the partition plate, improving heat exchange efficiency and increasing the durability of the sealing material. It is something that can be improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an impeller of a conventional heat exchange type blower, Fig. 2 is a vertical sectional view of the same blower, Fig. 3 is an explanatory diagram showing thermal deformation of the same speed blower, and Fig. 4 is a diagram of the present invention. A perspective view of an impeller of a heat exchange type blower in one embodiment, FIG. 5 is a vertical cross-sectional view of a dehumidifying dryer incorporating the blower, and FIG. 6 is a cross-sectional view of essential parts of the blower.
FIGS. 7 and 8 are explanatory diagrams showing the process of correcting thermal deformation of the blower. 9...blade, 12...outer peripheral plate, 20...partition plate.

Claims (1)

[Claims] 1. A blade consisting of a corrugated thin plate provided on the outer periphery of the main plate so that the groove portion is positioned radially from the rotation center axis, an outer peripheral plate supporting the outer periphery of this blade, and a blade arranged in the outer peripheral direction of this outer peripheral plate. A partition plate that separates two types of air flows on both sides, and a V-shaped cross section on the outer periphery of the outer peripheral plate, the length of the piece is longer on the low temperature side than on the high temperature side, and the tip of the partition plate on the blade side. A heat exchange type blower equipped with a roughly ring-shaped sealing material that encloses.