JPH0652157B2 - Heat exchange type blower - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat exchange type blower used for a dehumidification type clothes dryer, a ventilation fan, and the like.

2. Description of the Related Art A conventional heat exchange type blower of this type is disclosed in, for example, Japanese Patent Laid-Open No. 57-
As shown in Japanese Patent No. 47187, FIG.
The structure shown in the figure was known. In FIGS. 4 and 5, reference numeral 1 denotes an impeller of a heat exchange type blower, which has a corrugated blade 2. A substantially ring-shaped flexible seal member 3 having a V-shaped cross section is fixed to the outer periphery of the impeller 1. Reference numeral 4 denotes a rotary shaft that rotates the impeller 1, reference numeral 5 denotes a fan casing that encloses the impeller 1 to form an air passage, and reference numeral 6 denotes a partition plate that partitions the air flow on both sides of the impeller 1 at the air passage 7 portion. Reference numerals 8 and 9 denote air flows on both sides of the impeller 1 which exchange heat with each other.

The operation of the heat exchange type blower configured as described above will be described. When the impeller 1 is rotationally driven by a motor (not shown), the impeller 1 acts as a centrifugal blower and creates air streams 8 and 9 on both sides. The air streams 8 and 9 flow on both sides of the blade 2 and heat exchange takes place if there is a temperature difference between the two air streams. Both air flows 8 and 9 after heat exchange are blown to the ventilation passage 7 portion formed by the fan casing 5, but the air flows are exhausted without being mixed by the action of the seal member 3 and the partition plate 6.

Problems to be Solved by the Invention However, in the case of such a structure, in order to achieve a large heat exchange capacity, it is necessary to significantly increase the air flow rate, or it corresponds to a heat transfer surface for heat exchange. It is necessary to increase the blade surface area. However, in any of the above cases, it means an increase in the size of the impeller of the heat exchange-type blower, while the impeller of the heat-exchange-type blower performs rotation, in terms of mechanical strength, and in clothes dryers and the like. Due to limitations in external dimensions when applied to home appliances, there is also a limit to the size increase, and it has been difficult to realize a heat exchange type blower having a large heat exchange capacity.

In view of the above-mentioned drawbacks, the present invention realizes a heat exchange type blower having a high heat exchange efficiency and a high heat exchange capacity with a simple configuration.

Means for Solving the Problems In order to achieve this object, the heat exchange type blower of the present invention comprises:
A first path through which the working fluid flows, a second path through which the working fluid having a temperature lower than that of the working fluid flows through the first path, and a plurality of blades on both sides of the first path A configuration including a heat exchange fan impeller for blowing a working fluid, a heat exchanger provided in the vicinity of the outer periphery of the heat exchange fan impeller, and a fan casing that encloses all the above-mentioned components in a closed manner except for the working fluid inlet and outlet. The heat exchanger has corrugations that are substantially radial from the vicinity of the outer periphery of the heat exchange fan impeller, and a seal member is provided between the heat exchange fan impeller and the heat exchanger to provide the first and second heat exchangers. It is a complete partition of the route.

With this configuration, air is blown for heat exchange by rotating the heat exchange fan impeller, the primary heat exchange is executed in the heat exchange fan impeller, and then the vicinity of the outer periphery of the heat exchange fan impeller is performed. Secondary heat exchange is performed by the provided heat exchanger. In this way, heat exchange is performed in two places, the impeller part and the heat exchanger part, so that the heat exchange efficiency is improved, and since the heat exchanger is stationary, high mechanical strength is not required and the heat transfer surface is thinned. Also, the size of the heat exchanger can be increased, and a heat exchange type blower with a high absolute heat exchange capacity can be realized with a simple structure.

First Embodiment FIG. 1 is a partially cutaway perspective view of a heat exchange type blower according to the present embodiment as viewed from the first path side. Reference numeral 10 denotes a single heat exchange fan impeller made of a material such as metal or resin. A plurality of blades 12 also serving as fins are provided radially on both sides of the impeller main surface 11 around the rotation axis of the heat exchange fan impeller. There is. Reference numeral 13 is a seal member that surrounds the outer peripheral edge portion of the heat exchange fan impeller 10 and has a substantially ring shape, and has a V-shaped cross section that is opened in the centrifugal force direction. A heat exchanger 14 that is substantially concentric with the heat exchange fan impeller 10 and has a substantially donut shape that surrounds the heat exchange fan impeller 10 is provided near the outer peripheral portion of the heat exchange fan impeller 10. The heat exchanger 14 has corrugated unevenness 14 a substantially in a radial shape around the rotation axis of the fan impeller 10. The uneven portions 14a are formed along the direction in which the air taken in from the outside by the rotation of the heat exchange fan impeller 10 is discharged from the fan 10. Therefore, the distance between the uneven portions 14a becomes wider toward the outer circumference. . The heat exchanger 14 is made of the same material as the heat exchange fan impeller 10. The seal member 13 is in contact with the inner peripheral edge portion of the heat exchanger 14 to completely partition the first path and the second path and prevent air leakage. Reference numeral 15 denotes a spiral fan casing, which encloses and houses all the above-described components.

FIG. 2 is a vertical sectional view of this embodiment. The fan casing 15 includes an air intake port 19 for the first and second paths,
20, and the air outlets 21 of the first path and the second path,
22. Reference numeral 16 denotes an air flow flowing through the first path, and 17 denotes an air flow flowing through the second path having a temperature lower than that of the air in the first path. Reference numeral 18 is a rotating shaft driven by a motor.

Next, the operation of the configuration of this embodiment will be described.

First, in the above configuration, when the rotating shaft 18 rotates, the heat exchange fan impeller 10 fixed to the rotating shaft 18 rotates, and the air flow 16 flows from the first air intake port 19 and the second air intake port 20 flows. Creates an air flow 17. At this time, the respective air flows 16 and 17 are adjacent to each other via the impeller main plate 11 of the heat exchange fan impeller 10. Here, the air flows 16 and 17 perform the primary heat exchange. That is, the air taken in from the outside by the action of the blades 12 comes into contact with both side surfaces of the main plate 11 of the heat exchange fan impeller 10, so that the air 16 in the first path having a high temperature transfers the heat to the main plate 11 and the first plate 11. Air 17 of the second path having a low temperature is passed through the blade 12 on the second path side.
To release.

After that, the heat exchange fan impeller 1 is inserted through the seal portion 13.
Continuously with 0, the air 16 and 17 to which the first heat exchange has been performed moves to the heat exchanger 14. The heat exchanger 14 has corrugated irregularities 14a in a substantially radial shape around the rotation axis of the fan impeller 10, and the irregularities 14a are air 16 taken in from the outside by the rotation of the heat exchange fan impeller 10. , 17 are formed along the direction in which they are discharged from the fan impeller 10, they also serve as a kind of air guide. Therefore, the air flow 16, 1
7 is guided to the outer peripheral direction of the heat exchanger 14 without blowing loss. First
Since the path of No. 2 and the path of No. 2 are completely separated by the seal portion 13, the air flows 16 and 17 are separated by one thin plate forming the heat exchanger 14 without mixing. It flows through the path and is discharged from the air outlets 21 and 22 to the outside of the fan casing 15. In this state, if there is still a temperature difference between the air flows 16 and 17, the heat exchanger 1
Since it flows in contact with one thin plate having the uneven portion 14a of 4 from both sides, the heat of the air 16 flowing in the first path moves to the air 17 flowing in the second path through this thin plate. As a result, the second heat exchange is performed. Therefore, also here, the air 16 in the first path loses the amount of heat and the temperature decreases, and the air 17 in the second path is supplied with the amount of heat and the temperature rises.

As described above, according to the present embodiment, the heat exchange is performed by the impeller main plate 11 portion of the heat exchange fan impeller 10 and the heat exchanger 14, so that the heat exchange can be performed efficiently, and the heat exchanger 14 is Since it is a fixed type, its shape can be arbitrarily selected and the wall thickness can be reduced, and the absolute value of the heat exchange capacity can be made extremely high. Further, the air for heat exchange can be blown only by the heat exchange fan impeller 10, and a heat exchange type blower can be realized with an extremely simple configuration.

In the present embodiment, the shape of the heat exchange fan impeller is a double-blade fan type having blades on both sides of the impeller main plate, but the heat exchange fan impeller 10 having corrugated blades as shown in FIG. 3 (see FIG. 5). As shown in the figure, the conventional impeller) has a high primary heat exchange capacity and can realize a high-performance heat exchange type blower.

EFFECTS OF THE INVENTION As described above, the present invention provides a single heat exchange fan impeller capable of blowing air on both sides and capable of exchanging heat between the air on both sides, and a substantially radial shape provided near the outer peripheral portion of the heat exchange fan impeller. By providing the heat exchanger having the concavo-convex portion and the fan casing, it is possible to efficiently perform heat exchange with a simple configuration, and it is possible to realize a heat exchange-type blower having a high absolute heat exchange performance. , Its effect is great.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a heat exchange type blower according to an embodiment of the present invention, FIG. 2 is a side sectional view of the same, and FIG. 3 is a side cross sectional view of a heat exchange type blower showing another embodiment, FIG. 4 is a side sectional view of a conventional heat exchange type blower, and FIG. 5 is a perspective view of the impeller. 10 ... Heat exchange fan impeller, 14 ... Heat exchanger, 1
4a ... uneven part, 15 ... fan casing.

Claims (1)

[Claims] 1. A first path through which a working fluid flows, and the first path.
A second path through which a working fluid having a temperature lower than that of the working fluid flowing through the first path and a plurality of blades on both sides thereof are provided.
And a heat exchange fan impeller for blowing the working fluid in the second path, a heat exchanger provided in the vicinity of the outer periphery of the heat exchange fan impeller, and a portion other than the inlet and the outlet of the working fluid, and the first and A fan case that encloses the second path and the heat exchange fan impeller and the heat exchanger is provided, and the heat exchanger has corrugated irregularities substantially radially from the vicinity of the outer periphery of the heat exchange fan impeller, A seal member is provided between the heat exchanging fan impeller and the heat exchanger.
And a heat exchange type blower in which the second path is completely partitioned.