JPS60171390A - Heat exchanging type fan - Google Patents

Abstract

PURPOSE:To reduce friction between a seal member and a partitioning plate by a method wherein the section of the seal member is made into V-shape and the length of one side of the V-shape at high-temperature side is made longer than the other side of the V-shape at low-temperature side. CONSTITUTION:The ring-shaped seal member 13, having V-shape and one side of the V-shape at the high-temperature side is longer than the other side of the V- shape at the low-temperature side, is attached to an outer peripheral plate 12. The radial length of the V-shape seal member 13 at the side of high-temperature circulating airflow 24 is made shorter than the same at the side of low-temperature cooling airflow 25. According to this method, the deformation of a blade in low temperature direction due to a temperature difference is corrected by the increase of centrifugal force at the low temperature side and necessary rotating number may be secured without increasing the frictional force of rotation between the seal member and the partitioning plate while the heat exchanging efficiency as well as the durability of the seal member may be improved.

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 of different temperatures, and at the same time, blows air between air of 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, where 1 is a blade made of a corrugated thin plate made of stainless steel, aluminum, synthetic resin, etc., and 2 is a rotation center around blade 1. Boss 3 for supporting the impeller and fixing it to the rotating shaft
4 is a substantially ring-shaped outer circumferential plate that supports the blade 1 together with the main plate 2 from the outer circumferential direction, and this outer circumferential plate 4 has a substantially ring-shaped flexible sealing material 5 with a V-shaped surface. is fixed.

FIG. 2 is a schematic cross-sectional view showing two types of air flows in the impeller section, and 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 air flows 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 shown in the figure, the sealing material 5 is thermally deformed, and the rotational frictional force between the sealing material 5 and the partition plate 6 increases rapidly, resulting in a decrease in the rotational speed. The rotation speed decrease is caused by the high temperature air flow 7 and the low temperature air flow 8.
This causes problems such as a decrease in the flow rate and a decrease in heat exchange efficiency. Furthermore, wear of the sealing material 5 was a problem due to an increase in 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. 2. Structure of the Invention The heat exchange type blower of the present invention has blades, a main plate, an outer peripheral plate, and a partition plate. A ring-shaped sealing material with a longer low-temperature side is provided, and the deformation in the low-temperature direction due to the temperature difference between the blades is corrected by increasing the centrifugal force on the low-temperature side of the sealing material, thereby reducing seal breakage and friction between the partition plate. This is something that can be reduced.

DESCRIPTION OF THE ACTUAL CASE Hereinafter, one embodiment of the present invention will be described based on 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 outer peripheral plate that supports the blade 9 from the outer circumferential direction together with the main plate 10, and this outer peripheral plate 12 has a V cross section.
A substantially ring-shaped 7-ring member 13 is attached which has a longer radial length on the low-temperature side than on the still-temperature side.

FIG. 6 shows a schematic cross-sectional structure of a clothes dryer incorporating the above-mentioned impeller, where 14 is an outer frame of the dryer, 16 is a drum rotatably installed in the outer frame 14, and 16 is a clothes dryer in the drum 15. A door for putting things in, 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 1o.

19 is a casing that encloses the impeller 1 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, with a heater 22 installed in the middle; 23 is a duct for discharging the intake cooling air), 2
4.25 indicates the flow of drying circulating 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 f1 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, circulating air flows 24. A cooling air flow 25 is generated. The drying circulating air flow 24 is heated by the heater 22 and then enters the drum 15.
After heating the clothes in the drum 15, it moves along one side of the impeller 17 and is heated again to the heater 22 via the duct 21.
flow in the direction.

・ The cooling air flow 25 is drawn in from outside the aircraft and the impeller 17
along the other side and exits again through the duct 26. Then, the rain air flows 24 and 25 flow side by side through the grooves on both sides of the blade 9 with one thin plate in between, and at this time,
Heat is transferred from the high-temperature drying circulating air stream 24 to the low-temperature cooling air stream 25 via the blades 9, the circulating air stream 24 is cooled, and the moisture contained therein condenses into water droplets and is drained. Water is drained through the port 26, and the drying circulating air is dehumidified. The dehumidified and drying circulating air flow 24 is supplied to the impeller 1
7, a casing 19, and a partition plate 20, a circulation duct 21 is passed through a circulation duct 21, and then returned to a heater 22. On the other hand, a cooling air flow 26 is taken in from outside the machine, and is circulated through an impeller. 17, and here the drying circulation J
J is cooled by an air flow 24 and exhausted to the outside of the machine from a 4J1 air duct 23.

By the way, in the above configuration, the sealing material 13 is arranged such that the approximately radial length of the ■-shaped cross section is longer on the low-temperature cooling air flow 26 side than on the high-temperature circulating air flow 24 side, as shown in FIG. (L)M)

As shown in FIG. 7, when the blade 9 is about to deform toward the cooling air flow 26 side due to the temperature difference between the circulating air filter 24 and the cooling air flow 25, the sealing material 13 on the cooling air flow 26 side A centrifugal force f acts on the cooling air flow 26 side by the difference (L-4), correcting the deformation, and as shown in FIG. Since the rotational friction force between the seal 13 and the partition plate 2o 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 shape in which the cross section of the seal strip is shaped into a 7-shape, and the length of the lower temperature section 1111 is longer than that of the high temperature section.
Deformation toward low and high sides due to temperature differences can be corrected by centrifugal force, and the required rotational speed can be maintained without increasing the rotational friction force between the sealing material and the partition plate, improving heat exchange efficiency and improving the sealing material. This can improve durability.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the impeller of a conventional heat exchange type blower;
Fig. 2 is a longitudinal cross-sectional view of the blower, Fig. 3 is an explanatory diagram showing thermal deformation of the blower, Fig. 4 is a perspective view of an impeller of a heat exchange type blower according to an embodiment of the present invention, and Fig. 5 6 is a cross-sectional view of a main part of the blower, and FIGS. 7 and 8 are explanatory diagrams showing the process of correcting thermal deformation of the blower. . 9...Blade, 12...1 outer plate,
20... Partition plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure 5 Figure 6

Claims (1)

[Claims] A blade made of a corrugated thin plate provided on the outer cylindrical part of the main plate so that the groove portion is positioned radially from the rotation center axis, an outer peripheral plate that supports the outer peripheral part of this blade, and a plate arranged in the outer peripheral direction of this outer peripheral plate. and a partition plate that separates two types of airflow on both sides, and the outer peripheral plate includes a substantially ring-shaped sealing material having a V-shaped cross section and a piece longer on the low temperature side than on the high temperature side. Heat exchange type blower installed.