JPS59183293A - Fan of heat exchanger type - Google Patents

Abstract

PURPOSE:To realize a miniaturized fan of heat exchanger type having both heat exchanging function, and circulating and cooling blast functions at low cost, by fludizing each different fluid on the inside and the outside surfaces of a blade by the rotation of an impeller which is made nearly in the shape of a bell as a whole body. CONSTITUTION:An impeller 11 of a fan of heat exchanger type is so designed as to be in the shape of a bell, having a function of centrifugal fan, and the air-flow flowing toward the outer periphery of a blade is produced in a channel on the inside of a blade 15. On the other hand the same air flow is produced in the channel on the outside of a blade 15, the air is sucked from the intake port 13 of a casing 12, flowing to the direction of an outer periphery, and is discharged from a discharge port 14. The air for drying sucked to the inside of an impeller 11 is of high humidity in high temperature taking away moisture from clothes in a drum 8, while the air flowing along the outside of an impeller 11 is the air in the room temperature being sucked from the outside of a fan. Accordingly heat is exchanged between both airs by the intermediary of a blade 15, and the air for drying is cooled and dehumidified. The water produced by dehumidification is discharged to the outside of a fan from a discharg port 18. The air for drying being cooled is reheated by a heater 17 and is returned into the drum 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention 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 feed the fluids into the heat exchanger. When the working fluid is gas, a multi-tubular heat exchanger or a multi-tubular plate fin type heat exchanger is generally widely used.

In this case, the heat exchanger is large, and if it is combined with a blower that blows two types of gases, it becomes a big dimensional problem when it is assembled into a product, and it is also very expensive.

The plate fins and shell-and-tube heat exchangers, which have 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 heat exchanger tube 1, and other gas passes through the gaps between the plate fins 2. To explain its effect using an example when used in a dehumidifying clothes dryer,
is drying air sent by a circulation blower 4 from a rotating drum 3 that stores clothes, and is hot and humid.

Gas B 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 A2B2. The temperature of Mo2 is slightly lower than that of A and is in a saturated state. For this reason, a certain amount of moisture contained in the air liquefies into water. On the other hand, the temperature of the cooling air in B2 is slightly higher than that in B. As explained above, by removing moisture from the high-temperature, high-humidity air exhausted from the drum 3, there is an effect that the moisture contained in the clothes will not be released into the room.

Even in the case of practical use of dehumidifying clothes dryers like this, the effect of heat exchange is very large, but it requires a heat exchanger, a circulation blower 4, and a cooling blower 6. As a result, the disadvantages are that the product becomes larger and the price of the product increases.

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.

By rotating this impeller, different fluids can flow between the inner and outer blades, and heat can be exchanged between the two fluids 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.

The 1oFi motor 11 is an impeller of a heat exchange type blower, which has a 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. Reference numeral 15 denotes a wave-shaped blade that is externally attached to the impeller 11 with unevenness, and is located inside and outside the impeller 11, and is arranged so that the groove portion is approximately radial from the top of the bell. The blades 16 may be integrated with the impeller 11 or may be separate from the impeller 11, and their shape need not be wave-shaped but may be plate-shaped. 16Fi is a duct that leads hot and humid drying air to the impeller 11, and 17 is a duct that leads the hot and humid drying air to the impeller 1.
This is a heater for reheating the drying air that has been cooled and dehumidified in the dryer. 18 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 11 is rotated by belt drive.

Since the impeller 11 has a bell shape, it functions as 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 sub-airs via the blades 16, 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, the conventional
When exchanging heat between different fluids, two types of blowers and one heat exchanger were required, but the same function can be achieved with a single heat exchange type blower, as shown in Figure 6. This allows the device to be placed at a corner of the main body 6, thereby making it possible to reduce the size and cost of the product.

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 it can take the shape shown in FIG. Note that in order to easily manufacture the impeller, it is conceivable to make it integrally molded 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 a substantially bell-shaped overall shape of the impeller, and blades are arranged inside and outside of the impeller, so that heat exchange and air blowing can be performed easily. 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. side sectional view of
Fig. 4 is a sectional view of a main part showing an embodiment of the present invention, Fig. 6 is an explanatory view showing an example in which a blower is arranged in a corner part of the main body, and Fig. 6 is an enlarged sectional view of part A in Fig. 4. It is. 11... Impeller, 12... Casing, 13... Intake port, 14... Exhaust port, 15... Blade. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure B. 2 Figure 2 Figure 3

Claims (1)

[Claims] It is equipped with an impeller that has blades inside and outside and has an almost bell-shaped overall shape, and a casing that covers the outside of the impeller.As the impeller rotates, different fluids flow through the inside and outside surfaces of the blades. A heat exchange type blower characterized in that heat exchange is performed between fluids through the blades.