JPH0722634B2 - Dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a dryer of a type in which exhaust air from a drying chamber is heat-exchanged with outside air by a blower type heat exchanger to dehumidify.

(Prior Art) For example, in a blower type heat exchanger in a drum type dryer, a fan is rotatably disposed in a casing so as to be divided into an exhaust introduction chamber and an outside air introduction chamber. By the air blowing action accompanying the rotation, the exhaust air from the drum and the outside air are sucked into the exhaust gas introduction chamber and the outside air introduction chamber, respectively, and heat is exchanged between them. This blower type heat exchanger is arranged in a horizontal axis at the rear of the dryer outer box, and the front surface of the casing faces the inside of the drum, and the suction surface for sucking air in the drum to the front surface of the casing. Forming the mouth.

By the way, in this blower type heat exchanger, the air discharged from the drum is cooled by the outside air in the fan, and its moisture is condensed. Therefore, water droplets adhere to the surface of the fan on the exhaust introduction chamber side, and the water droplets are shaken off by the centrifugal force generated by the rotation of the fan. Some of the water drops that have been shaken off travel down the front surface of the casing, but since the front surface of this casing has an intake port that faces the inside of the drum, the water that has traveled down is absorbed by this intake port. May flow to the drum side and wet the clothes being dried.

(Problems to be Solved by the Invention) As described above, in the conventional dryer, a part of the water flowing down through the casing of the blast heat exchanger flows into the drying chamber through the suction port and is in the drying state. There was a problem of getting clothes wet.

Therefore, an object of the present invention is to provide a drier capable of preventing water generated by dehumidification from flowing into the drying chamber from the suction port when passing down the casing of the blower heat exchanger.

[Structure of the Invention] (Means for Solving the Problems) In the dryer of the present invention, the air in the drying chamber is provided on the inner surface of the chamber of the blower type heat exchanger through which the exhaust gas from the drying chamber flows. At least the upper half of the intake port for inhaling is projected into the room so as to surround it, and by providing a projecting wall whose projecting end side extends in the outer peripheral direction, at least the upper half of the intake port is surrounded. The guide groove is formed so as to open toward the side.

(Operation) Water flowing down the inner surface of the casing is received in the guide groove and guided by the guide groove to bypass the outside of the suction port and flow down. Therefore, water will not flow into the drying chamber from the suction port.

(Embodiment) An embodiment in which the present invention is applied to a so-called dehumidifying circulation type drum dryer will be described with reference to the drawings.

First, in FIG. 3 showing the overall structure, reference numeral 1 is an outer box, and a doorway 3 for opening and closing a material to be dried which is opened and closed by a door 2 is formed on the front surface. Reference numeral 4 denotes a drum which is a drying chamber, and the front side of which is rotatably fitted and supported by an annular support portion 5 which is provided on the rear side of the front side of the outer box 1, and the rear side of which is fixed to the rear portion of the outer box 1, for example, plastic. It is rotatably fitted and supported in a casing 6 made of steel.

In FIG. 1, a blower type heat exchanger 7 is composed of the casing 6 and a fan 8 rotatably arranged in the casing 6. Fan 8 of them
Is formed on the front and rear sides of the main plate 9 by forming an annular region of the circular main plate 9 in a corrugated shape along the circumferential direction.
Forming 11 The fan 8 is rotatably supported by a shaft 13 which is fastened and fixed by a nut 12 to the front surface of the casing 6, and divides the inside of the casing 6 into an exhaust introduction chamber 14 and an outside air introduction chamber 15. Then, a sliding contact ring 17 made of, for example, stainless steel, which has good slipperiness, is attached to the annular partition member 16 fixed to the casing 6, and a short tubular seal member 18 made of, for example, felt is attached to the outer peripheral portion of the main plate 9 of the fan 8. The sealing member 18 is brought into sliding contact with the sliding contact ring 17 to hermetically seal between the exhaust introduction chamber 14 and the outside air introduction chamber 15. On the other hand, the casing 6 is formed into a dish-shaped container having an open back surface, and the back surface is closed by a back plate 19 of the outer box 1. Then, in order to suck the air in the drum 4 into the exhaust gas introduction chamber 14 and return it into the drum 4, an inlet port 20 and an outlet port 21 are formed at the center and the lower part of the front surface of the casing 6 facing the drum 4, respectively. In addition, a suction port 22 and a discharge port 23 are formed in the back plate 19 for sucking the outside air into the outside air introducing chamber 15 and discharging the outside air. Reference numeral 24 is a heater for heating the air returned to the drum 4, and in FIG. 3, reference numeral 25 is a motor for rotating the drum 4 and the fan 8. In FIG. 1, 16a is a guide wall formed on the partition member 16, which is formed as shown by the chain double-dashed line in FIG. 4, and indicates the air sucked from the suction port 20 by the fan 8 by the arrow A. It serves to guide the heater 24 as shown.

By the way, a lint filter is provided on the front surface of the casing 6.
In order to form the concave portion 27 in which the 26 is arranged, a circular bulged portion 6a having a relatively large diameter is formed so as to be convex inside the casing 6. As shown in FIG. 2, the suction port 20 comprises a large number of holes 20a formed concentrically around the shaft 13 on the projecting end face of the bulging portion 6a.
It cannot be denied that the strength of the central portion of the front surface of the casing 6 is reduced due to the formation of. However, since the central portion of the front surface of the casing 6 is a portion for fixing the shaft 13 that supports the fan 8, a circular metal reinforcing plate 28 is provided on the back side of the bulging portion 6a.
Is attached to reinforce the front surface of the casing 6 that supports the fan 8. The lint filter 26 and the reinforcing plate 28 are
When the shaft 13 is tightened and fixed by the nut 12, the large diameter portion 13a of the shaft 13 and the nut 12 are tightened and fixed on the front surface of the casing 6.

Thus, as shown in FIGS. 1 and 2, the reinforcing plate 28 has a hole which forms the suction port 20 of the casing 6 in the central portion thereof.
A large number of holes 28a corresponding to 20a are formed. The reinforcing plate 28 is formed to have a diameter larger than that of the bulging portion 6a of the casing 6, and the outer peripheral portion of the reinforcing plate 28 projects outward from the bulging portion 6a. Then, the outer peripheral portion of the reinforcing plate 28 protruding outward from the bulging portion 6a is bent so as to be slightly inclined rearward. As a result, the outer peripheral portion of the reinforcing plate 28, that is, the inclined portion 28b bent so as to be slightly inclined rearward, is formed in the exhaust introduction chamber 14
From the inner surface of the front surface of the casing 6 which is the inner surface of the exhaust gas introduction chamber
It projects into 14 and the projecting side extends in the outer peripheral direction.
In this embodiment, the inclined portion 28b extends not only on the protruding end side but also from the root portion in the outer peripheral direction.
The inclined portion 28b functions as a protruding wall protruding from the inner surface of the exhaust gas introduction chamber 14, and the inclined portion 28b and the tapered peripheral wall portion 6b of the bulging portion 6a form an annular groove 29 as a guide groove. . The annular groove 29 is located at the outer peripheral portion of the bulging portion 6a and is located at the suction port.
It is positioned so as to surround 20 and has a substantially V-shaped cross section, which is open toward the outer peripheral side. Incidentally, in FIG. 3, reference numeral 30 denotes a drain hole formed at the lowermost bottom portion of the casing 6 so as to be located on the exhaust introduction chamber 14 side, and in FIG.
Reference numeral 31 denotes a water receiving container arranged below the drain hole 30, and a hose (not shown) is connected to the water receiving container 31.

Next, the operation of the above configuration will be described. When the drying operation is started, the heater 24 and the motor 25 are energized. When the motor 25 is started by this energization, the drum 4 rotates, while the centrifugal air blow action by the rotation of the fan 8 causes the air in the drum 4 to be sucked into the exhaust gas introduction chamber 14 from the suction port 20 and the discharge port.
While being returned from the drum 21 to the drum 4, it is heated by the heater 24, and outside air is sucked into the outside air introduction chamber 15 through the suction port 22 and discharged from the discharge port 23 to the outside. And
The air that has been heat-air-heated by the heater 24 and supplied into the drum 4 removes moisture from the material to be dried here, and is then sucked into the exhaust gas introduction chamber 14 again, where it is transferred to the outside air by heat conduction through the fan 8. The heat is exchanged for cooling and dehumidification, and after that, the material is circulated so that it is again heated and weathered and supplied into the drum 4.

In such a drying operation, the air discharged from the drum 4 is cooled by the outside air in the fan 8 and its moisture is condensed, so that water droplets adhere to the surface of the fan 8 on the exhaust introduction chamber 14 side. The water droplets are shaken off from the fan 8 into the exhaust gas introducing chamber 14 by the rotating centrifugal force. Then, the shaken off water drops flow down through the exhaust gas introducing chamber 14 and are discharged from the drain holes 30 into the water receiving container 31.

By the way, a part of the water shaken off by the fan 8 travels down the front part of the casing 6 from its upper part toward the bulging part 6a as shown by an arrow B in FIG. Department
Since the annular groove 29 is formed around the 6a by the reinforcing plate 28, the water is received by the annular groove 29, and the annular groove 29
4 flows down the outer peripheral portion of the bulging portion 6a as shown by an arrow C in FIG. 4, and along with other water, from the drain hole 30 to the water receiving container 31.
Is discharged to.

As described above, according to this embodiment, the water flowing down the front surface portion of the casing 6 is received by the annular groove 29, and the plurality of holes 20 are provided.
Since it flows down by bypassing the outside of the suction port 20 made of a, the problem that water flows into the drum 4 from the suction port 20 does not occur. In this case, the water that has flowed down into the annular groove 29 does not overflow from the annular groove 29 due to the inclined portion 28b functioning as a bank portion, and is guided by the annular groove 29 to the suction port.
It surely bypasses the outside of 20 and flows down. Therefore, the material to be dried such as clothes being dried is not blown by the blast heat exchanger 7.
It is possible to prevent the occurrence of a situation of being wetted by water from the side as much as possible, and it is possible to dry well.

In addition, in this embodiment, since the annular groove 29 is formed by using the reinforcing plate 28 in particular, the annular groove 29 can be formed without increasing the number of parts, which is advantageous in cost. is there.

In the above embodiment, the reinforcing plate 28 is formed to have a diameter larger than that of the bulging portion 6a, but the diameter may be smaller than that of the bulging portion 6a as long as it is larger than the formation area of the suction port 20, When the reinforcing plate is formed in this way, an annular groove having a substantially V-shaped cross section is formed around the suction port 20 by the projecting end surface of the bulging portion 6a and the rearwardly inclined portion of the outer peripheral portion of the reinforcing plate. Is. Further, in the above embodiment,
Although the annular groove 29 is formed by using the reinforcing plate 28,
If the structure of the forming die is allowed to be complicated, the annular groove may be integrally formed with the casing by integrally forming a protruding wall corresponding to the inclined portion 28b on the casing.

In addition, the air discharged from the drying chamber may be applied to a so-called exhaust type dryer in which the heat is exchanged with the outside air by a heat exchanger and then the air is discharged to the outside as it is without returning to the drying chamber.
Furthermore, various modifications can be made to the specific configuration of the fan constituting the blower type heat exchanger without departing from the scope of the invention when it is carried out.

[Advantages of the Invention] As described above, according to the dryer of the present invention, in the casing of the blower heat exchanger, the air in the drying chamber is sucked into the inner surface of the chamber in which the exhaust gas from the drying chamber flows. Of at least the upper half of the suction port, the projection wall is provided so that the projecting end side extends in the outer circumferential direction, so that at least the upper half of the suction port surrounds the outer circumferential side. Since the guide groove that opens by
It is possible to effectively prevent the situation where water that has been shaken off by the fan of the blower type heat exchanger and that flows down the inner surface of the casing flows into the drying chamber from the suction port, and it wets the material to be dried during drying. It has an excellent effect that it can be dried satisfactorily.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a vertical sectional side view of a blower type heat exchanger, FIG. 2 is an exploded perspective view of essential parts, FIG. 3 is a vertical sectional side view of a dryer, and FIG. FIG. 4 is a rear view of the dryer, shown broken away at the blower heat exchanger portion. In the figure, 4 is a drum (drying chamber), 6 is a casing, 7 is a blast type heat exchanger, 8 is a fan, 14 is an exhaust introduction chamber, 15 is an outside air introduction chamber, 20 is an intake port, 28 is a reinforcing plate, 28b Is an inclined portion (projection wall), and 29 is an annular groove (guide groove).

Claims (1)

[Claims] 1. A fan is rotatably disposed in a casing so as to divide the interior into two chambers, and the exhaust air and the outside air from the drying chamber are rotated by the rotation of the fan to one of the two chambers. And a blower type heat exchanger that is circulated to the other chamber and exchanges heat between the two air, in which the air inside the drying chamber is provided on the inner surface of one of the casings where the exhaust gas from the drying chamber flows. Of at least the upper half of the suction port for inhaling
The dryer is characterized in that by forming a projecting wall whose projecting end side extends in the outer peripheral direction, a guide groove is formed so as to surround at least the upper half of the suction port and open toward the outer peripheral side.