JPS6085297A - Heatexchange fan - Google Patents

Abstract

PURPOSE:To increase wind flow by providing a corrugated blade, inner and outer circumferential boards positioned on the inner/outer circumferences of said blade and second blade arranged at least on the outercircumference of said blade. CONSTITUTION:Inner/outer circumferential boards 4, 5 are provided respectively on the inner/outer circumferences of blade 1 while a partition board 8 for preventing mixing of two kind air flow flowing over the opposite sidefaces of blade 1 is provided in the outercircumferential direction of outercircumferential board 5. Consequently, when compared with conventional one having only corrugated blade, the air flow can be increased considerably resulting in improvement of heatexchange capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchange type blower that is used in dehumidifying clothes dryers and the like and is capable of blowing two types of air and exchanging heat between the two types of air. It is something.

Conventional structure and its problems Conventionally, this type of heat exchange type blower as shown in Figs.
It is disclosed in Japanese Patent No. 67790 and others.

In FIGS. 1 and 2, reference numeral 1 denotes a blade made of a corrugated thin plate with grooves located approximately radially from the central rotation axis 2, and an inner peripheral plate 4 having a boss 3 in the center is an inner peripheral plate of the blade 1. The outer peripheral plate 6- is located at the outer peripheral part of the blade 1. The blade 1, the inner peripheral plate 4. The outer circumferential plate 6 and the impeller 6 of the heat exchange type blower are configured. 7 is a casing that forms a swirling chamber for two types of air flowing on both sides of the impeller 6, and 8 is a partition plate disposed in the outer circumferential direction of the outer circumferential plate 5 to prevent the two types of air from flowing together. The impeller 6 itself hermetically separates the two air streams. 9°1o are intake ports for two types of air, 11.12 are exhaust ports, and 13 and 14 indicate 2 JjlI air flows.

The operation of the conventional heat exchange type blower configured as described above will be described below. A motor (not shown), which is turned on immediately, rotates and drives the inverter 6.

As a result, two types of air are independently drawn into the grooves on both sides of the wave-shaped blade 1 through the intake ports 9 and 10. At this time, rain air flows through the blade 1 and flows on both sides of the blade 1.

When there is a temperature difference between two types of air, heat is transferred from the higher temperature air to the lower temperature air, resulting in heat exchange. Both airs that have undergone heat exchange are independently exhausted through exhaust ports 11 and 12.

The heat exchange capacity of the heat exchange type blower is approximately proportional to the surface area of the wave-shaped blades 1 and the air volume. The grade surface area is comparable to the heat transfer area of a general heat exchanger, and increasing the blade surface area can increase the heat exchange capacity. However, increasing the blade surface area means increasing the size of the impeller 6, which has the disadvantage that the entire device becomes large. In addition, increasing the air volume increases the heat exchange capacity, but in order to increase the air volume, it is necessary to significantly increase the outer diameter or increase the rotation speed. However, there were problems in that the entire heat exchange type blower device became larger and the noise became louder.

purpose of invention The present invention provides a convertible blower.

Structure of the Invention In order to achieve this object, the heat exchange type blower of the present invention includes a blade made of a corrugated thin plate whose groove portion is located approximately radially from the central axis of rotation, and an inner blade located on the inner periphery of the grade. a peripheral plate, an outer peripheral plate located on the outer peripheral part of the blade, and a partition plate located in the outer peripheral direction of the outer peripheral plate to prevent mixing of two types of air flows flowing on both sides of the blade; By providing a second blade on at least one side, compared to the case of only a wave-shaped blade,
It was possible to significantly increase the air volume, thereby improving the heat exchange capacity.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Components having the same configuration as the conventional example are given the same numbers and detailed explanations are omitted.

3 and 4, 1 is a blade made of a corrugated thin plate made of metal or resin, 3 is a boss provided on the inner peripheral plate 4, and 6 is a blade made of a corrugated thin plate made of metal or resin;
is the outer circumferential plate, 6 is the blade 1° inner circumferential plate 4, outer circumferential plate 6
It is an impeller consisting of.

7 is a casing, 8 is a partition plate, 9 and 1o are intake ports for two types of air, 11.12 is an exhaust port, and 13.1
4 shows two types of air flow.

A second blade 15 is provided on the outer peripheral plate 6 of the blade 1. In this embodiment, the second blade 15 has the shape of a multi-blade fan.

FIG. 6 shows a clothes dryer using the heat exchange type blower. In this case, the two types of air flow are high temperature air, which is drying air for drying clothes, and low temperature air, which is room temperature cooling air. 16 is the main body of the dryer; 17 is a rotatable drum driven by a motor 18 via a drum belt 19; 20 is a clothes input device 1 provided at the front of the main body 1; and 21 is a drum for blowing air into the drum 16. This is a heat source for heating the drying air. The impeller 6 shown in FIG. 3 is provided on the back of the main body 16, and the blades 1
A second blade 16 is located on the outer periphery of the cooling air side. The impeller 6 is driven by the motor 18 and the shift belt 22
Driven through. A support plate 23 holds the impeller 6 and the casing 7. Reference numerals 24 and 25 are cooling air intake and exhaust ports provided on the back plate 26. Reference numeral 27 denotes a circulation valve, which functions as a ventilation passage connecting the casing 7 and the intake side of the heat source 21. 28 is a drain port for the dehumidified water condensed in the impeller 6. 29 and 30 indicate the flows of drying air and cooling air, respectively.

The operation of the clothes dryer using the heat exchange type blower according to the present invention configured as above will be explained below.

When the power is turned on, the motor 18 rotates, the drum 17 containing clothes rotates, and the impeller 6 of the heat exchange type blower rotates. In addition, the heat source 21 is energized, and the heated drying air removes moisture from the clothes in the drum 17, and the humid drying air is taken into the impeller 6. At the same time, the cooling air is passed through the intake port 24 into the impeller. Air is taken into the opposite surface of the impeller 6, and heat is exchanged between the two through the blades 1 of the impeller 6. At this time, the drying air is cooled, condensed, and discharged to the outside of the main body 16 through the drain port 28 as dehumidified water. The drying air is dehumidified by condensation.

The drying air is sent through the circulation duct 2 to the heat source 21, where it is heated again and guided into the drum 17, where the drying air is circulated. On the other hand, the cooling air undergoes heat exchange with the impeller 6, is heated, and is then exhausted to the outside of the machine through the exhaust port 25.

Generally, the capacity of a blower can be expressed by the relationship between the pressure H and the pressure H obtained when a flow rate Q is applied, that is, the QH characteristic. Therefore, the QH characteristic of the heat exchange type blower having the second blade 15 is shown by the solid line in Fig. 6, and the QH characteristic of the conventional heat exchange type blower is
When the heat exchange type blower is used in a clothes dryer, the relationship characteristics with the pressure H required to flow the flow rate Q, that is, the load characteristics are shown with the dashed line. According to this, when the heat exchange type air blower according to the present invention is applied to a clothes dryer, approximately 26φ
The air volume increases. FIG. 7 shows the heat transfer rate and division it representing the heat exchange capacity of the heat exchange type blower with respect to the amount of cooling air of the clothes dryer. From Figures 6 and 7, if the heat exchange type blower of the present invention is adopted and the cooling air volume is increased by approximately 26%, the heat transfer rate, that is, the heat exchange capacity will be improved by approximately 10%, and this will improve the clothes dryer. The basic performance of the dehumidifier 5 can be improved by about 10%.

In this embodiment, the shape of the second blade 15 is a multi-blade fan shape (sirocco fan shape), but as shown in FIG. 8, the same effect can be achieved even if it is a forward-sweeping blade shape. Further, as shown in FIG. 9, the second blade 16 may be provided slightly apart from the wave-shaped blade in the outer circumferential direction. In this case, the second blade acts effectively on the air from each blade and the air between the blade and the second blade 15, further increasing the effect.

Further, in this embodiment, the second blade 15 is provided only on one side, but the effect will be even greater if it is provided on both sides.

Effects of the Invention As described above, the present invention provides a wave-shaped blade, an inner peripheral plate and an outer peripheral plate located on the inner and outer peripheries of the blade, and a second blade on at least one side of the outer periphery of the blade. It is possible to increase the heat exchange capacity, which has a great effect.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional impeller, Fig. 2 is a side sectional view of a conventional heat exchange type blower, Fig. 3 is a perspective view of an impeller according to an embodiment of the present invention, and Fig. 4 is a perspective view of an impeller according to an embodiment of the present invention. Fig. 5 is a side sectional view of a clothes dryer using the heat exchange type blower, Fig. 6 is a QH characteristic diagram of the blower, and Fig. 7 is a plan view of the impeller. It is. 1...Blade, 4...Inner peripheral plate, 5.
...Outer peripheral plate, 16...Second blade. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2F! 4 7 Figure 3 Figure 5 Figure 6 Figure 5 L quantity σ (mt'n1n) Figure 7

Claims (1)

[Claims] a blade made of a wave-shaped thin plate with a groove portion located radially from the central axis of rotation; an inner peripheral plate located on the inner peripheral part of the grade; and an outer peripheral plate located on the outer peripheral part of the blade; A heat exchange type blower comprising: a partition plate located in the outer circumferential direction of the outer peripheral plate to prevent mixing of two types of air flows flowing on both sides of the blade, and a second blade provided on at least one side of the outer peripheral part of the grade.