JPH0428992B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchange type air blower that can be used in dehumidifying type clothes dryers, heat exchange type ventilation devices, and the like.

Conventional Structure and Problems Conventionally, when exchanging heat between two types of working fluids, different blowers or pumps were used to send the fluids into the heat exchanger. When the working fluid is gas, a multi-tube type heat exchanger or a multi-tube type with plate fins is generally widely used as a heat exchanger. In this case, the heat exchanger is large in size, and when combined with a blower that blows two types of gases, it becomes a big dimensional obstacle when it is assembled into a product, and it is also very expensive.

A multi-tubular heat exchanger with plate fins, which has been widely used in the past, will be explained in more detail with reference to FIGS. 1 and 2. 1 is a heat exchanger tube, and 2 is a plate fin for heat radiation. Gas passes through the inside of the heat exchanger tube 1, and other gas passes through the gap between the plate fins 2. To explain its use using a dehumidifying type clothes dryer as an example, gas _A1 is drying air sent by a circulation blower 4 from a rotating drum 3 that stores clothes. be. The gas _B1 is cooling air sent from outside the machine by the cooling blower 5, and is at normal temperature and humidity.

The states after heat exchange are A ₂ and
B becomes ₂ . _A2 has a slightly lower temperature than _A1 and is in a saturated state. Therefore, a certain amount of the moisture contained in the air at A ₁ liquefies and becomes water. On the other hand, the temperature of the cooling air is slightly higher in _B2 than in _B1 . As explained above, drum 3
By removing moisture from the high-temperature, high-humidity air exhausted from the room, there is an effect that the moisture contained in clothes will not be released into the room.

Even in the case of practical use in dehumidifying clothes dryers like this, the effect of heat exchange is very large, but the heat exchanger and circulating air blower 4
Since this method requires a cooling blower 5, the product has drawbacks such as an increase in size and an increase in product price.

For this reason, it has been considered that a single blower can function as a heat exchanger, circulation blower, and cooling blower, but when incorporated into a product, it cannot necessarily be said that effective space utilization can be achieved, and further improvements can be made. is requested.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and provides a small, inexpensive heat exchange type blower having a heat exchange function and two types of air blowing functions.

Structure of the Invention The heat exchange type blower of the present invention has an impeller whose overall shape is approximately bell-shaped, and has blades inside and outside the impeller. By rotating this impeller, air is blown independently on the inner and outer surfaces of the blades, and heat exchange is performed between the air blown on the inner and outer surfaces of the impeller through the blades. Since the impeller is approximately bell-shaped, it can be installed at a corner when assembled into a product.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. In the figure, 6 is the main body of the dryer, and a door 7 is attached to the front of the dryer so that it can be opened and closed.
Reference numeral 8 denotes a drum that rotates within the main body 1, and a filter 9 for removing cotton dust is freely attached and detached on the rear surface. 10 is a motor, and 11 is an impeller of a heat exchange type blower, which has a substantially bell-shaped overall shape and is driven by the motor 10. A casing 12 is provided to cover the outside of the impeller 11, and has an intake port 13 and an exhaust port 14 for cooling air. Blades 15 are wave-shaped by adding irregularities to the impeller 11, and are located inside and outside the impeller 11, and are arranged so that the groove portions are approximately radial from the top of the bell. The blades 15 may be integral with the impeller 11 or may be separate from the impeller 11, and their shape need not be wave-like but may be plate-like. 16 is a duct that guides hot and humid drying air to the impeller 11, and 17 is a heater for reheating the drying air that has been cooled and dehumidified within the impeller 11. 1
8 is a drain port for draining dehumidified water.

In the above configuration, the operation will be explained. When the motor 10 is energized, the impeller 1 is driven by the belt.
1 rotates. Since the impeller 11 has a bell shape, it has the movement of a centrifugal blower. Therefore, air flows toward the outer periphery in the inner groove of the blade 15. On the other hand, the same thing occurs in the outer groove portion, where air is taken in through the intake port 13 of the casing 12, flows toward the outer circumference, and is exhausted through the exhaust port 14. The drying air taken into the inside of the impeller 11 is hot and humid air that has removed moisture from the clothes in the drum 8, while the air flowing outside the impeller 11 is room temperature air taken in from outside the machine. Therefore, heat exchange is performed between the two airs through the blades 15, and the drying air is cooled and dehumidified. Water generated by dehumidification is drained out of the machine through the drain port 18. The cooled drying air is reheated by the heater 17 and returned into the drum 8.

As explained above, according to the embodiment of the present invention, when heat exchange is conventionally performed between two types of fluids, two types of fluids are used.
Previously, a heat exchange type blower and a heat exchanger were required, but the same function can be achieved with a single heat exchange type blower, and furthermore, it can be placed in the corner of the main body 6 as shown in Fig. 5. This makes it possible to reduce the size and cost of products.

In the embodiment, a dehumidifying clothes dryer has been described, but the principle can be applied to a wide range of devices such as ventilation equipment, heat dissipation of general power supplies, heat exchange equipment of plants, etc.
Further, the material and structure of the impeller are not particularly limited as long as they can have a shape approximately as shown in FIG. Note that in order to easily manufacture the impeller, it is conceivable to make it by integral molding from a resin material.

Effects of the Invention As is clear from the above embodiments, the heat exchange type blower of the present invention has an impeller with a substantially bell-shaped overall shape and blades arranged inside and outside the impeller, which allows for simple heat exchange and air blowing. In addition, when applied to clothes dryers and the like, it can be installed in the corner of the product, resulting in excellent effects such as miniaturization and cost reduction of the product.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional heat exchange section, FIG. 2 is a side sectional view of a conventional dehumidifying clothes dryer, and FIG. 3 is an overall configuration of a dehumidifying clothes dryer according to an embodiment of the present invention. 4 is a sectional view of a main part showing an embodiment of the present invention, FIG. 5 is an explanatory view showing an example in which a blower is arranged at a corner inside the main body, and FIG. 6 is a sectional view of FIG. FIG. 11... impeller, 12... casing, 13
...Intake port, 14...Exhaust port, 15...Blade.

Claims (1)

[Claims] 1.Equipped with an impeller having an almost bell-shaped overall shape with inner and outer blades, and a casing provided to cover the outside of the impeller, the rotation of the impeller blows air independently on the inner and outer surfaces of the blades, and A heat exchange type blower that exchanges heat between the air blown by the blades.