JPS6335901B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is applicable to dehumidifying type clothes dryers, heat exchange type ventilation devices, etc. that transfer heat from exhausted indoor air to outside air drawn into the room. This relates to a heat exchange type blower that can be used.

Structure of the conventional example and its problems As shown in Fig. 1, the conventional heat exchange type blower has a partition plate 3 fixed to separate two types of air flows 1 and 2, and an outer peripheral part of the blade 4. The gap between the supporting and rotating outer circumferential plate 5 was sealed using a mechanical seal, a labyrinth seal, or the like. However, in either case, it is necessary to provide a sliding portion with extremely high precision or to make the gap portion extremely narrow. As a result, the shaft torque required for rotation may increase, and the blade may run out or
There was a problem in that extremely high precision was required for eccentricity, making processing and assembly difficult.
In other words, it is difficult to call this a practical sealing method, and it is extremely expensive.

Therefore, in heat exchange blowers used in home appliances such as dehumidifying clothes dryers, the second
A sealing method as shown in FIGS. 3 and 3 has been proposed. In other words, a sealing material 6 having a substantially V-shaped cross section is provided in the outer circumferential plate 5 to provide a gap between the outer circumferential plate 5 that supports the outer peripheral portion of the blade 4 and the partition plate 3 that separates two types of airflow. This is a simple sealing method.

However, such a structure has the following problems when used as a dehumidifying clothes dryer. This problem will be explained with reference to FIG. When the dehumidifying clothes dryer is operated, the high temperature air of the heat exchange type blower is cooled by heat exchange with the cooling air, so that dehumidified water 9 is generated on the high temperature air side. This dehumidified water 9 flows down around the sealing material 6 after the operation of the dehumidifying clothes dryer ends, and collects as water droplets 10 between the sealing material 6 and the partition plate 3. The water droplets 10 will be cooled and frozen in extremely cold regions where the ambient temperature is below 0C. In other words, the partition plate 3 and the sealing material 6 become stuck together, resulting in a problem that the impeller 8 of the heat exchange type blower cannot rotate.

Purpose of the Invention The present invention focuses on such conventional problems, and provides a heat exchange type blower that can be used in extremely cold regions by devising the configuration of the sliding part where the sealing material slides. This is what I am trying to do.

Structure of the Invention The heat exchange type blower of the present invention is composed of blades, a main plate that supports the inner peripheral part of the blades, and an outer peripheral plate that supports the outer peripheral part of the blades, and an impeller that blows air independently on both sides of the blades. , an outer circumferential plate disposed in the outer circumferential direction of the outer circumferential plate to separate two types of air streams blown on both sides of the impeller; and a flexible outer circumferential plate provided on the outer circumferential plate to close the gap between the outer circumferential plate and the partition plate. and a sliding member provided on the inner peripheral edge of the partition plate, the sliding member having a cross section formed into a substantially ring shape with an opening, and a sealing member provided on the partition plate on the outer peripheral surface of the ring shape. The partition plate has an eave-like protruding edge that receives water droplets, and the partition plate is installed by inserting the inner peripheral edge of the partition plate into the opening of the sliding member. This is a highly reliable heat exchange type blower that can prevent freezing of parts.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 5, 6, 7, and 8, reference numeral 11 denotes a heat exchange type blower, an impeller, and a blade 12 made of a corrugated plate with grooves provided approximately radially from the center of rotation; It is composed of a main plate 13 that supports the inner circumferential portion of the blade 12 and has a boss portion 13a, and an outer circumferential plate 14 that supports the outer circumferential portion of the blade 12. 15 and 16 are two types of air flows flowing on both sides of the impeller 11, and 17 is a partition plate disposed in the outer circumferential direction of the outer circumferential plate 14 to prevent mixing of these two types of air flows 15 and 16. . Reference numeral 18 denotes a rotating shaft connected to the impeller 11 at the boss portion 13a, and is driven by a belt motor (not shown). 19 is the outer peripheral plate 14
The sealing material is a flexible member having a substantially V-shaped cross section, and closes the gap between the outer circumferential plate 14 and the partition plate 17. Reference numeral 20 denotes a sliding member provided on the inner peripheral edge of the partition plate 17, and as shown in FIG. 8, the cross-sectional shape is approximately ring-shaped with an opening 20a. It has a canopy-like protruding edge 27 that receives water droplets generated on the plate 17.
Further, in this embodiment, the sliding member 20 is made of an elastic material such as stainless steel, and is formed into an annular shape having a diameter approximately equal to the diameter of the inner peripheral edge 17a of the partition plate 17. 21, 22 and 23, 24 are an intake port and an exhaust port formed in the casing 25, respectively.

FIG. 7 shows a method of attaching the sliding member 20 to the partition plate 17. First, as shown in FIG. 7a, the annular sliding member 20 is squeezed to a small diameter, and then, as shown in FIG. 2
0a is inserted and fixed using the elasticity of the sliding member 20. Moreover, FIG. 8 is a sectional view of the main part of the assembly completed through the steps shown in FIG. 7. In the present embodiment, the opening 20a of the sliding member 20 is extended outward to provide a canopy-shaped protruding edge 27, but the canopy-shaped protruding edge 27 does not necessarily need to be provided in the opening 20a, and the partition It may be placed anywhere on the outer peripheral plate as long as it can receive the dehumidified water generated on the plate 17.

With the above configuration, this effect will be explained below.

As shown in FIG. 8, when a clothes dryer using a heat exchange type blower is operated, water droplets 28 are formed on the dry air path side of the partition plate 17. This water droplet 28 is received by the protruding edge 27 of the sliding member 20, travels along the protruding edge 27, reaches the lower end of the inner peripheral edge 17a of the partition plate 17, and flows down the partition plate surface. This prevents water droplets generated on the partition plate 17 from flowing down to the sealing material 19, and even if the water droplets 28 freeze in extremely cold regions, it is possible to prevent the sealing material 19 and the sliding member 20 from sticking together. be. Therefore, even in extremely cold regions, there is no possibility that the impeller will not rotate.

Further, in this embodiment, the protruding edge 27 of the sliding member 20
are provided on both sides of the opening 20a, but may be provided only on the dry air path side, that is, on the side of the partition plate 17 where water droplets are generated.

Next, another embodiment of the present invention will be described with reference to FIG. That is, the sliding member 20 is formed by winding the inner circumferential edge 17a of the partition plate 17 into a ring shape, and furthermore, the end of the ring shape is located on the dry air path side where water droplets 28 are generated, and the projecting edge 27 is attached to this end. established,
Water droplets 28 are prevented from flowing out to the sealing material 19 side. With this configuration, the number of parts can be reduced and the number of assembly steps can also be reduced.

Furthermore, in this embodiment, an impeller having a single wave-shaped blade is used, but for example, as is conventionally known, an impeller having a configuration in which blades are provided on both sides of a single flat plate may be used. It can be anything.
In short, any configuration that allows air to be blown independently on both sides of the impeller and heat exchange between the blown air may be used.

Effects of the Invention As is clear from the above embodiments, according to the present invention, the sliding member that comes into sliding contact with the sealing material is provided with a protruding edge so that it can receive water droplets generated during operation. This makes it possible to provide a highly reliable heat exchange type blower that can prevent the sealing material and the sliding member from freezing even if the sealing material and the sliding member are frozen.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a conventional heat exchange type blower, Fig. 2 is a sectional view of the same main part, Fig. 3 is a sectional view of the main part showing another conventional example, and Fig. 4 is a sectional view of the main part of the conventional heat exchange type blower. 5 is a sectional side view of a heat exchange type blower showing an embodiment of the present invention; FIG. 6 is a perspective view of the heat exchange impeller; FIG. a and b are perspective views for explaining the mounting method of the sliding member, FIG. 8 is a cross-sectional view of essential parts for explaining the operation of one embodiment of the present invention, and FIG. 9 is a perspective view of another embodiment of the present invention. FIG. 2 is a sectional view of a main part of a heat exchange type blower in an example. DESCRIPTION OF SYMBOLS 11... Impeller, 12... Blade, 13... Main plate, 14... Outer peripheral plate, 17... Partition plate, 17a... Inner peripheral edge, 19... Seal material, 20... Sliding member, 20a...
Opening portion, 27... protruding edge.

Claims (1)

[Claims] 1. An impeller that is composed of a blade 12, a main plate 13 that supports the inner circumference of the blade 12, and an outer circumferential plate 14 that supports the outer circumference of the blade 12, and that blows air independently on both sides of the blade 12. and the outer peripheral plate 14
A partition plate 17 is arranged in the outer circumferential direction of the impeller and separates two types of air flows blown from both sides of the impeller, and a partition plate 17 is provided on the outer circumferential plate 14 to close the gap between the outer circumferential plate 14 and the partition plate 17. Flexible sealing material 1
9 and a sliding member 20 that connects with the sealing material 19 provided on the inner peripheral edge of the partition plate 17, the sliding member 2
0 is a heat exchange type blower whose cross section is formed into a substantially ring shape, and a canopy-like protruding edge 27 is provided on the outer peripheral surface of the ring shape to receive water droplets generated on the partition plate 17. 2 The sliding member 20 has an opening 20a in its ring-shaped cross section.
2. The heat exchange type blower according to claim 1, wherein the heat exchange type blower has a structure in which the inner circumferential edge of the partition plate 17 is inserted into the opening 20a of the opening 20a. 3. The sliding member 20 is formed by winding the inner peripheral edge of the partition plate 17 into a ring shape, and a protruding edge 27 is formed at the terminal end of the ring to receive water droplets generated on the partition plate 17. The heat exchange type blower described.