JP2006034802A - Dryer for laundry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly and uniformly perform drying and cooling of laundry regarding a dryer for business use carrying out drying of laundry with heated air and air cooling of heated laundry. <P>SOLUTION: A front wall and a rear wall of a case 1 are provided with cold air ports 7a, 7b in direct communication with the outside of the dryer, facing the end faces of a rotating drum 2 opened at both end faces. In a drying process, dampers 8a, 8b are closed, while in a cooling process, the dampers 8a, 8b are alternately opened/closed. Drying heated air is led in along the peripheral surface of the rotating drum, and laundry can be dried in a spread state inside the rotating drum 2 to realize uniform and quick drying. When cooling, a lowering of cooling efficiency caused by heating the cooling air on the wall of the case and the peripheral surface of the rotating drum can be avoided, and uneven distribution of laundry inside the rotating drum 2 can be prevented by the alternate opening/closing of the cold air ports 7a, 7b to realize uniform and quick cooling. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial laundry dryer that performs drying of laundry with heated air and air cooling of heated laundry, and in particular, arrangement of a damper for taking in cooling air, and cooling It relates to such a device characterized by its operation in time.

  A commercial laundry dryer includes a housing having a door for loading and unloading laundry, a rotating drum having a large number of ventilation holes in the peripheral surface thereof, and the peripheral surface through the peripheral surface. A blower for allowing the dry air to pass through the rotating drum and a heater for heating the dry air are provided. The laundry containing moisture is put into the rotating drum, and is dried in a floating state while being loosened in the rotating drum by the rotation of the rotating drum and the heated air passing through the peripheral surface thereof. The dried laundry is discharged from the dryer and sent to the ironing process.

  In order to perform drying efficiently, heated air is used as the dry air, and a heater using steam as a heat source is provided at an air intake port provided on the upper surface of the housing in order to obtain the heated air. The ventilation blower is arranged on the lower surface or upper surface of the housing. When the blower is placed on the upper surface of the housing, a rectifying partition wall is provided in the housing so that dry air crosses the rotating drum in the direction perpendicular to the axis. Make it flow. Thereby, the laundry is in a floating state in the rotating drum, and uniform drying can be performed efficiently.

In order to facilitate the removal and transport of the laundry after drying and to prevent wrinkles from remaining, it is desirable to cool the dried laundry quickly. Therefore, after drying, outside air is introduced into the housing and air cooling is performed. In general, cooling air flows using a flow path that is common to heated air. However, cooling air is heated by the casing wall and the peripheral surface of the rotating drum before flowing into the rotating drum. In order to avoid a decrease in efficiency, a structure in which cooling air is introduced through a laundry input door has been proposed. In addition, in a dryer having a rotating drum with both end faces open, a structure has been proposed in which both heated air and cooling air flow into the rotating drum from the end surface of the rotating drum.
Registered Utility Model Publication No. 3044829 JP 2004-97831 A

  As described above, the heating air for drying flows in through the circumferential surface of the rotating drum, so that the laundry is uniformly spread in the rotating drum and is uniformly exposed to the drying air. Prompt drying is possible. If the cooling air is also introduced into the rotating drum through the same flow path, uniform cooling is performed for the same reason. However, when the cooling air is introduced through the rotating drum circumferential surface, the cooling air is cooled by the heated circumferential surface. Heated, cooling efficiency decreases.

  Therefore, in the above-described conventional device, the cooling air is introduced from the end surface of the rotating drum that is largely open, thereby preventing the cooling air from being heated by the casing wall and the peripheral surface of the rotating drum. However, with this structure, the laundry in the rotating drum cannot be spread by the air flow, and the laundry is collected at the back side or the central portion of the rotating drum, which reduces the efficiency and uniformity of cooling. appear.

  This invention makes it a subject to obtain the technical means by which cooling of a laundry is performed more promptly and uniformly in the drying machine which cooled the heated laundry by introduction of outside air.

  The laundry dryer according to the present invention that has solved the above-mentioned problems heats the casing 1, the cylindrical or polygonal cylinder-shaped rotating drum 2 that rotates about the horizontal axis in the casing, and the air guided into the casing. Heater 3 and a blower 5 for discharging the air in the rotating drum, and the rotating drum is opened close to the peripheral surface 20 provided with a number of air holes and the front and rear walls 28a and 28b of the housing. In the laundry dryer having the both end surfaces 11a and 11b, the front and rear walls facing the open both end surface regions of the rotary drum are alternately opened and closed during the cooling step after the drying step. The cool air vents 7a and 7b are provided.

  The invention of claim 2 of the present application is the laundry drier provided with the above-mentioned means, and the loading door 23 provided on the front wall of the housing 1 for loading the laundry into the rotary drum 2 is centered on the center. The cold air outlets 7a and 7b are provided in the upper part of the front and rear walls 28a and 28b of the housing.

  The dryer having the above structure is provided with the rotary drum 2 having both end faces greatly open, and the front wall 28a and the rear wall 28b of the casing are directly attached to the outside facing the wide open end face of the rotary drum. The cooler air vents 7a and 7b provided with the dampers 8a and 8b communicating with each other are provided, and the dampers 8a and 8b are closed together in the drying process, while the dampers 8a and 8b are alternately opened and closed in the cooling process. In addition, the heated air in the laundry drying process is introduced into the rotary drum 2 through the peripheral surface 20 of the rotary drum, and uniform and quick washing by providing these features. Both drying and cooling of the object can be achieved.

  That is, since the drying air is introduced through the peripheral surface 20 of the rotating drum, the laundry can be dried in a state of being spread in the rotating drum 2, and uniform and quick drying is realized. it can. On the other hand, at the time of cooling, the cooling air is introduced through the cool air vents 7a and 7b directly communicating with the outside of the machine without passing through the heated rotating drum peripheral surface 20, so that the cooling air is transferred to the housing wall or the rotation. A decrease in cooling efficiency due to heating on the waist surface can be avoided.

  And by alternately opening and closing the cold air outlets 7a and 7b on the front wall side and the rear wall side of the housing during the cooling process, it is possible to prevent the laundry from being unevenly distributed in the rotating drum 2, and the laundry is spread in the rotating drum. In this state, uniform and quick cooling is realized.

  As described above, according to the present invention, in a laundry drier that performs drying of laundry by heated air and subsequent cooling of the laundry by outside air, the drying and cooling of the laundry are both uniform and Therefore, it is possible to perform the process quickly, and therefore, it is possible to shorten the time required for the laundry to be supplied to and discharged from the dryer.

  Further, in the structure in which the center of the charging door 23 is offset downward from the center of the rotary drum 2, the opening area of the cold air vents 7a and 7b can be increased, and the height of the charging door 23 can be increased in a large dryer. Therefore, there is an effect that the laundry can be easily put into and taken out of the dryer.

  Hereinafter, an example of the most preferred embodiment of the present invention will be described with reference to the drawings. 1 to 7 are views showing the main part of the embodiment device, FIG. 1 is a front view, FIG. 2 is a rear view, FIG. 3 is a sectional front view showing a flow state of heated air, and FIG. FIG. 5 is a cross-sectional front view showing a ventilation state of cooling air, and FIG. 6 and FIG.

  In the figure, 1 is a casing, 2 is a rotating drum, 3 is a heater for heating dry air, 4 is a damper for hot air that opens and closes the vent of the heater, 5 is a centrifugal blower for ventilation, and 6 is an exhaust duct. The provided filters for collecting dust such as cotton dust, 7a and 7b are cold air vents, and 8a and 8b are cold air dampers.

  The rotating drum 2 includes a peripheral surface 20 formed of a punching metal or a metal mesh, guide rings 10a and 10b are provided at both ends thereof, and both end surfaces 11a and 11b are open. The rotating drum 2 is housed in the housing 1 so as to be rotatable about a horizontal axis by supporting the guide rings 10a and 10b with two pairs of rollers 12a and 12b provided in the front and rear of the housing 1. Of the four rollers, the ones before and after one side are connected by a roller shaft 13, and when the roller shaft is driven to rotate by an electric motor 14, the rotating drum 2 rotates.

  Wiper (partition walls) 18a and 18b whose tip sides are in contact with the circumferential surface of the rotating drum 2 are provided inside the side wall 16 and the ceiling wall 17 of the casing 1, and air in the casing is further passed from the upper wiper 18a. A rectifying wall 19 is provided for eliminating starch. The wipers 18a and 18b block air flowing through the gap between the housing 1 and the peripheral surface 20 of the rotating drum.

  As shown in FIG. 1, the insertion port 22 for taking in and out the laundry is provided on the front wall 28 a of the housing 1 so as to be biased downward from the rotary drum 2. That is, the center of the closing door 23 is located at a position lower than the center of the rotary drum 2. The input door 23 is pivotally attached to the front surface of the housing by a hinge 24, and is provided with a lock device 25 that holds the closed state.

  A cold air outlet 7a is opened in a space facing the rotating drum end surface 11a in the upper front wall generated by providing the input door 23 biased downward, and a cold air damper 8a for closing the cold air outlet is provided. Yes. A cold air inlet 7b and a cold air damper 8b are provided at the same position on the rear wall of the housing so as to face the cold air outlet 7a on the front wall of the housing. The cold wind damper 8a is provided with an upper side hinged to the housing front wall 28a with a hinge 24, and the cold wind damper 8b is provided with a lower side hinged to the housing rear wall 28b with a hinge 24 provided around the hinge. Open / close cylinders 30a and 30b having a structure for swinging and opening the cold air dampers 8a and 8b are provided. The front and rear walls 28a and 28b of the housing are close to the front and rear end faces 11a and 11b of the rotary drum. When the dampers 8a and 8b are opened, the cold air vents 7a and 7b are directly connected to the machine without passing through a duct or the like. Open to the outside.

  Next, the operations of the laundry drying process and the cooling process of the illustrated apparatus will be described. The laundry is put into the rotary drum 2, the closing door 23 is closed, and a start switch (not shown) is pressed to start the drying process. In the drying process, the blower 5 is operated while rotating the rotary drum 2 with both the cold air dampers 8a and 8b closed and the hot air damper 4 opened. In this state, as shown in FIGS. 3 and 4, the air 32 heated by the heater 3 is introduced into the rotating drum 2 through the peripheral surface 20 of the rotating drum, and flows across the rotating drum 2 in the radial direction. The air is exhausted by the centrifugal blower 5 through the filter 6. The rotating drum 2 rotates counterclockwise in FIG. 3, and laundry (not shown) in the rotating drum is lifted along the right peripheral surface of FIG. 3, and is dried by the heated air flow 32 when falling. The

  When the drying process for a predetermined time is completed, the steam to the heater 3 is shut off, the hot air damper 4 is closed, and the front and rear cool air dampers 8a and 8b are both opened. The rotating drum 2 and the blower 5 continue to rotate. In this state, the introduction of hot air passing through the heater 3 is stopped, outside air is introduced into the rotating drum 2 from the front and rear cold air ports 7 a and 7 b, flows across the diameter of the rotating drum 2, and passes through the filter 6. And discharged by the blower 5. The reason why both of the cold air dampers 8a and 8b are opened at the initial stage of the cooling process is to increase the amount of cold air supplied into the rotary drum 2 and to rapidly cool the machine.

  For example, when cooling is performed for about 1 minute with the cold air dampers 8a and 8b on both sides opened, one of the cold air dampers is then closed so that the cold air is introduced only from the cold air port on one side. Then, for example, the opening and closing of the front and rear cool air dampers 8a and 8b are alternately repeated every 30 seconds so that the ventilation states shown in FIGS. That is, by alternately opening and closing the cold air dampers 8a and 8b, an air flow 33a flowing in from the front and an air flow 33b flowing in from the rear are alternately generated in the rotating drum 2, and the laundry in the rotating drum 2 is moved back and forth. Since the laundry is not moved to one side and the laundry being cooled is widely dispersed on the peripheral surface of the rotating drum 2, the lifting and dropping of the laundry due to the rotation of the rotating drum 2 is repeated. Are uniformly exposed to the cooling air, so uniform and rapid cooling can be realized.

  When the cooling process for a predetermined time is completed, the rotary drum 2 and the blower 5 are stopped, and the lock device 25 of the closing door 23 is released when the rotary drum 2 is stopped. Therefore, the operator opens the input door 23, takes out the dried laundry, and inputs the next laundry.

  In the above-described embodiment, the case where the dry air and the cooling air are passed from the upper side to the lower side is described. However, the heater 3 and the blower 5 are provided above the housing 1, and the dry air 32 and the cooling air 33a and 33b are provided. However, the present invention can be applied to a dryer having a structure that flows in a U-shape in the front view of the rotating drum 2 or a structure that flows in a direction horizontally across the rotating drum.

Front view of the dryer of the present invention Rear view of the dryer of the present invention Cross-sectional front view showing the flow state of heated air Cross-sectional side view showing the flow of heated air Cross-sectional front view showing the ventilation state of cooling air Cross-sectional side view showing the state of ventilation from the front of the cooling air Cross-sectional side view showing ventilation from the back of cooling air

Explanation of symbols

1 Housing 2 Rotary drum 5 Centrifugal blower
7a, 7b Cold air outlet
11a, 11b Both end faces of the guide ring
20 Rotating body circumference
23 Input door
28a, 28b Front and rear walls of housing

Claims (2)

A casing (1), a cylindrical or polygonal cylinder-shaped rotating drum (2) that rotates about a horizontal axis in the casing, a heater (3) that heats air guided into the casing, and the rotating drum And a blower (5) for discharging the air, and the rotating drum has a peripheral surface (20) provided with a large number of ventilation holes and both ends opened close to the front and rear walls (28a, 28b) of the housing A laundry dryer comprising surfaces (11a, 11b),
Laundry characterized in that the front and rear walls opposed to the open both end regions of the rotating drum are provided with cold air vents (7a, 7b) that are alternately opened and closed during the cooling step after the drying step. Dryer.   A charging door (23) provided on the front wall of the housing for charging laundry into the rotating drum is provided with its center biased downward with respect to the center of the rotating drum, The laundry drying device according to claim 1, wherein the cold air vents (7a, 7b) are opened above the front and rear walls (28a, 28b) of the housing.

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