JPS6334760B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a clothes dryer having a heat exchange type blower.

Structure of a conventional example and its problems The structure of a conventional clothes dryer using a heat exchange type blower is shown in FIGS. 1 to 3. In the figure, 1 is a body of a clothes dryer, and 2 is a drying drum rotatably installed in the body 1, which stores clothes to be dried and is driven by a motor. Reference numeral 4 denotes a heat exchange impeller constituting a heat exchange type blower, which is composed of a corrugated thin plate made of resin, metal plate, etc., with grooves arranged radially from the rotation center axis. 5 is a fan belt for rotating the impeller 4. 6 is a cooling air side casing that forms a cooling air side spiral chamber together with the back plate 7, and 8 is a drying air side casing that forms a drying air side spiral chamber. 9 indicates the rotation direction of the impeller 4, which is counterclockwise.
The spiral chamber starting points 10 of the cooling air side casing 6 and the drying air side casing 8 are provided at the same position, and the cooling air exhaust port 10' and the drying air exhaust port 8' are also located in the cooling air side casing. 6 at the same position. 11 is a holder for fixing the cooling air side casing 6 to the body 1, 12 is a cooling air intake port provided on the back plate 7, and 13 is a cooling air intake port provided on the back plate 7 in front of the cooling air exhaust port 10'. It is an air exhaust louver. 14
is a drain port for draining dehumidified water. Reference numeral 15 is an input port for inputting clothes into the drying drum 2. Reference numeral 16 denotes a circulating wind cylinder that guides drying air, and 17 a heating element that heats the drying air supplied into the drying drum 2. 18 is a drying air path connecting the drying drum 2 and the heating element 17, and 18' represents the flow of drying air.

When the power is turned on in a conventional clothes dryer using a heat exchange type blower configured as described above, the motor 3 rotates, and the drying drum 2 is rotated by belt transmission. rotates. The rotation of the impeller 4 causes a flow of drying air 18' and a flow of cooling air 1.
9' is generated, and the drying air is heated by the heating element 17, then evaporates the moisture from the clothes in the drum 2, and is drawn into the impeller 4 as hot and humid air. At this time, since there is a flow of cooling air 19' on the other side of the impeller 4, heat exchange is performed through the blade surface of the impeller 4, and the hot and humid drying air is deprived of heat and condensed into condensed water. This results in cooling and dehumidification. The drying air that has been cooled and dehumidified by the impeller 4 is guided back to the heating element 17 and circulated. On the other hand, dehumidified water is drained from the drain port 14.

In the conventional clothes dryer described above, the drying air discharged from the impeller 4 changes its flow direction by about 90 degrees when it is guided to the circulating air cylinder 16 from the exhaust port 8' of the drying air side casing 8. This results in a very large pressure loss. Therefore, there is a problem in that the amount of drying air is small, the drying speed of clothes is reduced, and as a result, the drying time is long. In order to solve this problem, the cross-sectional area of the ventilation path should be made as large as possible, and the direction of the flow should be changed more smoothly. For example, as shown in FIG. 3, if the cooling air side casing 6 is provided with a bulge 20 projecting toward the back plate 7 side, the cross-sectional area of the ventilation passage becomes large, and the amount of drying air increases. However, simply providing the bulge still leaves the following problems. In other words, as shown in FIG. 3, in a conventional clothes dryer, the spiral chamber starting points 10 of the drying air side casing 8 and the cooling air side casing 6 coincide, and the cooling air exhaust port 10' and the drying air side casing 8 coincide with each other. Since the air exhaust ports 8' are at the same position sandwiching the cooling air side casing 6, the passage 21 at the cooling air exhaust port becomes narrower, and the cooling air flow rate decreases. This means that the drying time will be longer.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems and provides a high-performance clothes dryer with short drying time and high efficiency at a low cost.

Structure of the Invention The present invention relates to the start point of a swirl chamber of a drying air side casing that separates a cooling air path and a drying air path near a drying air exhaust port of a heat exchange type blower used in a clothes dryer, and the cooling air side. The bulging portions are formed so that the spiral chamber starting points of the casing are at different positions, and the cooling air exhaust port and the drying air exhaust port of the heat exchange type blower are provided at different positions.

DESCRIPTION OF EMBODIMENTS An embodiment of the clothes dryer of the present invention will be described below based on the accompanying drawings. In FIGS. 4 and 5, the same parts as in FIGS. 1 to 3 are designated by the same reference numerals. The difference from the conventional example is the configuration of the cooling air side casing that separates the cooling air path and the drying air path near the drying air exhaust port of the heat exchange type blower. In this embodiment, the cooling air side casing 6 is provided with a bulge 22 that protrudes toward the back plate 7 so that the drying air flow 18' flows smoothly. The starting point 23 of the volute chamber of the casing 6 and the starting point 24 of the volute chamber of the drying air side casing 8 are set at different positions. Furthermore, in conjunction with this, the cooling air exhaust port 26 is provided at a position away from the bulging part 22 provided in the cooling air side casing 6, and the drying air provided in the drying air side casing 8 of this bulging part 22 is provided. It is located at a different position from the exhaust port 8'.

In this way, the swirl chamber of the cooling air side casing 6 starts from its starting point 23 and ends near the cooling air exhaust port 26, forming a complete swirl chamber. Therefore, the amount of cooling air does not decrease due to the presence of the bulging portion 22, and the cross-sectional area of the cooling air ventilation path near the cooling air outlet 26 does not decrease, which does not cause a decrease in the amount of cooling air.
On the other hand, as shown in FIG. 5, the cross-sectional area of the drying air 18' is expanded, and the direction of the flow can be changed with a smooth shape, making it possible to significantly increase the amount of drying air. This makes it possible to shorten drying time and improve efficiency.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a partition portion that separates a cooling air path and a drying air path near the drying air exhaust port of a heat exchange type blower used in a clothes dryer By providing a bulge in the cooling air path and the drying air path, the spiral chamber start point and exhaust port of each of the cooling air path and the drying air path are shifted from each other, thereby increasing the drying air flow rate without reducing the cooling air flow rate. can achieve a significant increase in
It is possible to provide a high-performance clothes dryer with short drying time and high efficiency.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional clothes dryer with the back plate removed; Fig. 2 is a side sectional view of the conventional clothes dryer; Fig. 3 is a partial sectional view for explaining the drying air discharge section; FIG. 4 is a perspective view of a clothes dryer according to an embodiment of the present invention with the back plate removed, and FIG. 5 is a sectional view showing the vicinity of the exhaust port of the drying air side casing, which is the main part. 6...Cooling air side casing, 8...Drying air side casing, 8'...Drying air exhaust port,
23... Start point of the swirl chamber of the cooling air side casing,
24...Starting point of the swirl chamber of the drying air control casing, 22...Bulging portion, 25...Exhaust port for cooling air.

Claims (1)

[Claims] 1. A drying air path that connects the drying drum and the heating element, a cooling air path for cooling air that cools the drying air in this drying air path, and a cooling air path that guides the drying air and cooling air to the front and back of the impeller, and Equipped with a heat exchange type blower that can be exchanged,
A bulge is formed on the cooling air side casing so that the starting point of the swirl chamber of the drying air side casing and the starting point of the swirl chamber of the cooling air side casing are at different positions, and a cooling air exhaust port of the heat exchange type blower is formed. A clothes dryer with a drying air outlet and a drying air outlet located at different locations.