JPS58216097A - Dryer apparatus of washed article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drying device for laundry, and more particularly to a drying device suitable for continuously drying a large amount of sheets in a laundry factory.

Conventionally, a device as shown in FIG. 1 has been mainly used in laundry factories to continuously dry heavily wrinkled sheets. That is, a plurality of (for example, four) rolls arranged in parallel are each placed on one side of a chest 2 (an airtight container to which high-temperature steam can be supplied, generally referred to as a chest) having a concave arc cross section and dried. This device is arranged opposite to each other with a gap between the sheets 3 to be passed through the chests 2, and supplies high-temperature steam into each chest 2, and discharges hot water generated inside the chests 2 to the outside. To dry the sheets 3 with this device, the sheets 3 to be dried can be fed in sequentially from one side of the device as shown by arrow 4 while rotating the roll l.
The fed sheets 3 are dried by receiving heat from the chest 2 supplied with steam, and dried sheets 3' are sequentially fed out from the bottom side of the apparatus.

In this case, the heat transfer coefficient Q that the sheet 3 receives from the chest 2 side is Q = U, where the heat transmission coefficient of the contact surface between the chest 2 and the sheet 3 is Ul, the contact area is A, and the temperature difference is ΔT.・A・ΔT --- There is a relationship as shown in (1). In this conventional drying device, chest 2
Due to the structure, the steam supplied to the system is discharged as hot water.
High specific volume of steam and hot water (approximately 185:1)
, Therefore, the steam flow rate was slow < , and the heat transmission coefficient U in equation (1) was small. Therefore, in order to improve drying productivity, increase the steam pressure and dry the chest 2.
By increasing the internal temperature of the steam, the temperature difference ΔT in equation (1) above was increased and the heat transfer aCt was increased, but there is a certain limit to increasing the steam pressure, so production At the same time, there were limits to sexual improvement, and if the internal temperature of the chest was increased, the sheet 3 would burn,
There were many problems, such as not being able to achieve a soft finish even if it did not burn.

The present invention has been made in view of the above-mentioned problems, and in a laundry drying apparatus configured as shown in FIG. 1, a steam line is connected to the steam supply port of the chest via an ejector, and The gas phase side of the flash tank is connected to the chest, the inlet of the flash tank is connected to the steam outlet of the chest, and the liquid phase side of the flash tank is connected to a drain line via a steam trap. The purpose of this drying device is to (1) increase the heat transfer rate U and l to the sheets by increasing the flow rate of steam in the chest, thereby increasing the heat transfer density Q; (2) It is possible to eliminate the burning of sheets and provide a soft finish with high productivity.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 shows a first embodiment of the present invention, in which each chest 2 in the drying apparatus shown in FIG.
A steam line 7 is connected to the steam supply port 5 of the chest 2 via the ejector 6, and a gas phase side 8a of the flash tank 8 is connected to the suction side 6a of the ejector 6. Connect to steam outlet 9. The liquid phase side 8o of the 7-laser tank 8 is connected to a drain line 11 via a steam trap IO. In the figure, 12 is a bypass line attached to the ejector 8, 13 is a bypass valve, and 14 is an on-off valve. The ejector, 6 and 7 lattice tank 8 are housed in one housing 15, with a connection 16 to the steam line 7,
A connection part 17 to the steam supply port 5 of the chest 2, a connection part 18 to the steam discharge port 9 of the chest 2, and a connection part 19 to the steam trap 50 are each composed of 7 lunges and other connectors, and are connected to the outside of the housing 15. It is taken out.

Next, the operation of the above embodiment will be explained. That is, bypass valve 1
Close 3, NIjl14 of steam supply port 5 of chest 2
When the on-off valve 14 of the steam outlet 9 of the chest 2 is opened and steam of both temperatures is sent from the steam line 7, the steam flows into the chest 2 through the ejector 6 and heats the chest 2. When the steam passes through the ejector 6, the suction side 6a of the ejector 6 sucks the steam in the flash tank B, and this suctioned steam also joins with the steam sent from the steam line 7 and is sent to the chest Z side.

As a result of the ejector 6 sucking the inside of the flash tank B, the steam and liquefied hot water inside the chest 2 pass through the steam outlet 9 to the inlet 8 of the flash tank 8.
It will be attracted to the b side. The steam and hot water that have passed through the chest 2 and been sucked into the inflow port 8b are flushed into the flash tank 8 through the inflow port 8b, and the steam is sucked into the suction side 6a of the ejector 6 again to the chest 2. While being recirculated, the hot water accumulated in the flash tank 8 is discharged to the drain line 11 side via a steam trap IO connected to the liquid phase side 8o.

゛As a result of the above, hot water is actively discharged from the steam circulation path of the chest 2, and the flow rate of steam increases, so the heat transmission coefficient between the chest 2 and the M5 items to be dried such as the sheets 3 increases. It is possible to increase U. Therefore, the heat transfer mci in the above equation (1) also becomes large, and drying productivity can be improved. Furthermore, since the drying work can be carried out without increasing the internal temperature of the chest 2, it is possible to prevent the sheets from burning and give them a soft finish.

Next, the above-mentioned first embodiment constitutes a drying device (Chess)
While one ejector 6, one flush tank 8, and one steam trap 1o are required for one chest, the second embodiment shown in FIG. The present invention is implemented using a set of ejectors 6, flash tanks 8, and steel wraps 10. That is, multiple chests (the figure shows four) 2.2
The steam supply port 5.5 is connected to the supply line connection, and the steam line 7 with the supply line nod and the ejector 6 interposed is connected.
and the steam outlet 9 of the chest 2.2.
．． 9 is connected to the discharge line 21, and the discharge line 21 and the inlet 8b of the flash tank 8 are connected. The mutual connection structure between the ejector 6, the flash tank 8, and the steam trap IO is the same as that of the first embodiment, and the ejector 6 and the flash tank 8 are housed in one housing 15.

In this second embodiment, the steam sent from the steam line 7 through the ejector 6 flows into the plurality of chests 2.2 simultaneously from the supply line 2.2 to each chest 2.2.
Heat 2. Also, as in the previous example, the steam and hot water in each chest 2.2 is sucked into the flash tank 8 via the discharge line 21. Therefore, in this practical example as well, the hot water in the chest 2.2 is actively discharged, and as a result, the flow rate of steam increases, and as in the first example, the heat transmission coefficient U1 is increased and the heat transfer rate is increased. mQ can also be increased. As a result, productivity can be improved, sheets can be prevented from burning, and a soft finish can be achieved.

As described above, the present invention provides a laundry drying apparatus in which a plurality of rolls are m&ed, a chest is provided oppositely to one side of each roll, and steam is supplied into the chest. Connect a steam line to the steam supply port of the chest via an ejector, connect the gas phase side of the flood tank to the suction side of the ejector, and connect the inlet of the flash tank to the steam discharge port of the chest. This laundry drying loading method is characterized in that the liquid phase side of the tank is connected to the drain line via a steam trap, so the hot water inside the chest can be drained well and the steam flow rate can be increased. It increases the heat transfer [tQ] without increasing the temperature difference ΔT between the chest and the sheets, which has the effect of (1) improving drying productivity, and (2) preventing sheets from burning and making them soft. This has the effect of making it possible to achieve a good finish.

Furthermore, if the ejector and flash tank are housed in one housing, and the connections for the steam line, the steam supply and discharge ports of the chest, and the steam trap are each taken out of the housing, this housing can be attached to an existing drying device. The present invention can be easily applied by simply attaching a body and performing connection work for each connection part.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram of a laundry drying device to which the present invention is applied;
FIG. 2 is a block diagram of the first practical example of the present invention. FIG. 3 is a block diagram of a second embodiment of the present invention. l ... 1 Roll 2 ... Chest 3 ... Sheet 5 ... Steam supply port 6 ... Ejector 6a ... Suction side 7 ... Steam line 8 ... ... Flash tank 8a ... Gas phase side 8b ... Inlet 8C ... Liquid phase side 9 ... Steam outlet 10 ... Steam trap 11 ... Drain line 15 ...Housing 16.17.1B, 19...Connection part 1N 3rd @

Claims (1)

[Scope of Claims] A laundry drying apparatus in which a plurality of rolls are arranged in parallel, a chest is provided oppositely on one side of each roll, and a steam is supplied into the chest. Connect a steam line to the steam supply port of the Chicost via an ejector, connect the gas phase side of the 7 lacy tank to the suction side of the ejector, and connect the flash tank ℃ inlet and the steam outlet of the chest, A laundry drying device characterized in that the liquid phase side of a run-yu tank is connected to a C drain line via a steam trap. 2. The ejector, the flan, and the tank are housed in one housing, and the steam line, the steam supply inlet and outlet of the chest, and the connections to the steam trap are each taken out from the housing, as set forth in claim 1. Drying the laundry 1! lI! Device.