JPS6325356Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The 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. The present invention relates to heat exchange type blowers that can be used.

Configuration of a conventional example and its problems As an example, a clothes dryer using a conventional heat exchange type blower will be described. In Figure 1, 1 is the body of the clothes dryer, 2 stores the clothes, and body 1
It is a rotating drum that is rotatably installed relative to the drum, and is rotationally driven by a motor 3. 4 is an impeller of a heat exchange type blower, 5 is a fan belt for rotating the impeller 4, 6 is a fan case that houses the impeller 4, 7 is a drying circulating air blown on the side facing the drum of the impeller 4, and an outside of the machine. This is a partition plate that prevents mixing of cooling air blown on the opposite side. 8 is a back plate, 9 is an input port for putting clothes into the rotating drum 2, 10 is a cooling air intake port provided on the back plate 8, 11
is the cooling air exhaust port. Reference numeral 12 denotes a circulation duct for introducing drying circulating air, and a drain port 13 for draining dehumidified water is provided in the middle of the duct. 14 is a heater that heats the drying circulating air supplied into the rotating drum 2. 15 represents the flow of drying circulation air, and 16 represents the flow of cooling air.

The operation of the clothes dryer using the heat exchange type blower having the above configuration will be explained. When you turn on the power,
The motor 3 rotates, and the rotating drum 2 rotates by belt transmission. At the same time, the impeller 4 rotates via the fan belt 5. The rotation of the impeller 4 generates a flow 15 of drying circulating air on the side facing the drum and a flow 16 of cooling air on the side facing the outside of the machine.
After the circulating air for drying is heated by the heater 14, the moisture contained in the clothes is evaporated within the rotating drum 2, and the air becomes high temperature and high humidity, which is then sucked into the impeller 4. At this time, since room-temperature cooling air taken in from outside the machine through the cooling air intake port 10 is flowing to the outside facing side of the impeller 4, heat exchange is performed via the blade portion of the impeller 4. As a result, the drying circulating air is heated and condenses to produce water. The drying circulating air that has been cooled and dehumidified by the impeller 4 is led back to the heater 14 and circulated. On the other hand, the dehumidified water is drained from the drain port 13 to dry the clothes.

Incidentally, in order to prevent mixing of drying circulating air and cooling air and increase efficiency, a sealing material 17 made of flexible felt or the like is provided around the outer periphery of the impeller 4, and a partition plate 7 is provided at the opening of the sealing material 17. The inventors have proposed a structure as shown in FIG. 2, in which the inner circumferential end is positioned to close the gap with the partition plate 7.

With this configuration, the sliding contact surfaces between the sealing material 17 and the partition plate 7 can be provided at both ends of the partition plate 7, and a high sealing effect can be obtained with low sliding resistance.
The centrifugal force and wind pressure applied to the sealing material 17 result in a very high airtightness, which is very beneficial. However, moisture and moisture are present in the drying circulation air path. Therefore, the sealing material 17 contains moisture in the atmosphere while the dryer is operating, and this water 18 oozes out to the surface due to capillary action after the dryer has finished operating. At this time, when used in an extremely cold region where the ambient temperature is below 0°C, the water 18 existing on the surface of the sealing material 17 is cooled and frozen, causing the partition plate 7 and the sealing material 17 to stick together.
There is a risk that the impeller 4 will not rotate the next time it is used.

The case where a heat exchange type blower is used in a clothes dryer has been described above, but the above case is not limited to this, and the above case can also be applied when a heat exchange type blower is applied to a place where moisture is present around the impeller and a sealing material is used. A problem exists.

Purpose of the invention The present invention solves these problems and provides a highly reliable heat exchange type blower that has improved sealing performance and can withstand use in extremely cold regions in the presence of moisture. It is.

Structure of the invention The heat exchange type blower of the invention has a structure in which a flexible and water-repellent approximately U-shaped sealing material is arranged between a rotating impeller and a fixed partition plate to close the gap between the two. This prevents mixed flow of heat exchange air and also allows use in the presence of moisture.

DESCRIPTION OF EMBODIMENTS An embodiment of the heat exchange type blower of the present invention will be described below based on the accompanying drawings. In FIGS. 3 and 4, reference numeral 19 is an impeller of a heat exchange type blower, which includes a blade 20 made of a corrugated plate with grooves radially extending from the center of rotation, and a boss portion that supports the inner circumference of the blade. The main plate 21 has a main plate 21, and the outer circumferential plate 22 supports the outer circumferential portion of the blade, and these are integrally formed. 23 and 24 are the blades 2
0, that is, the side facing the drum and the side facing the outside of the machine, are two types of airflows with different temperatures, and 25 is a partition plate that prevents mixing of these two types of airflows, and is arranged in the outer circumferential direction of the outer peripheral plate 22. It has been done. The impeller 19 is driven by a motor (not shown) via a belt. 26 is a flexible and water-repellent sealing material made of, for example, silicone rubber, provided to close the gap between the outer circumferential plate 22 and the partition plate 25;
The partition plate 25 has a substantially U-shaped cross section, and the inner circumferential end of the partition plate 25 is disposed at the opening thereof, and is attached around the outer circumferential plate 22. Two types of air flows 23 and 24 having different temperatures are individually taken in through intake ports 27 and 28,
Heat exchange takes place via the blades 20. Thereafter, the air is exhausted from the exhaust ports 29 and 30 independently without mixing.

When the above-mentioned heat exchange type air blower is used in a dehumidifying type clothes dryer, moisture is present in at least one of the two types of air flow. Therefore, the sealing material 26 absorbs water, and under low temperature atmospheric conditions, this water may freeze and cause the partition plate 25 and the sealing material 26 to become stuck. However, since the sealing material 26 has flexibility and water repellency, the sealing material itself does not contain water, and therefore no water exists between the partition plate 25 and the sealing material 26. In other words, the sealing material 26 and the partition plate 25 do not freeze and stick to each other, causing no problem during the next operation, and have extremely high sealing performance. A blower can be used. Note that water droplets attached to the partition plate 25 may fall onto the seal material 26 and accumulate between the partition plate 25 and the seal material 26, but this can be prevented by providing a flange on the partition plate 25 to prevent the water droplets from falling to the seal material 26 side. Although not shown, such a means is provided.

In this embodiment, the impeller has a single corrugated plate blade, but the impeller may be constructed by, for example, attaching blades to both sides of a single flat plate. In short, it is sufficient that the structure is such that air can be blown independently on both sides and heat exchange can be performed between the blown air.

Effects of the Invention As is clear from the above embodiments, the heat exchange type blower of the present invention uses a substantially U-shaped sealing material to prevent mixed flow of heat exchanged air, and also has flexibility and repellency as a sealing material. By using a water-based material, it is possible to prevent the sealing material and partition plate from freezing when used in extremely cold regions, and a highly reliable heat exchange type blower is realized. It's simple and the effect is great.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a clothes dryer using a heat exchange type blower, Fig. 2 is a sectional view showing details around the sealing material of the same heat exchange type blower, and Fig. 3 is a side sectional view of a clothes dryer using a heat exchange type blower. FIG. 4 is a side cross-sectional view of the replaceable blower, and is a cross-sectional view showing one embodiment of the sealing material. 19... impeller, 20... plaid, 21...
... Main plate, 22 ... Peripheral plate, 25 ... Partition plate, 26
...A sealing material that is flexible and water repellent.

Claims (1)

[Scope of utility model registration request] An impeller that blows air independently on both sides and performs heat exchange between the blown air, and an impeller that is arranged in the outer circumferential direction of the impeller to prevent mixing of two types of air flows blown by the impeller. The sealing material provided on the outer periphery of the impeller has a substantially U-shaped cross section, and the inner peripheral end of the partition plate is positioned in the opening to close the gap between the impeller and the partition plate. A heat exchange type blower that is flexible and water repellent.