JPH048397A - Drier for clothes or the like - Google Patents

Abstract

PURPOSE:To release air after it is previously cooled, when the air passing through a drying chamber is released to the atmosphere, and to collect solvent steam, contained in drain air, as much as possible so as to make release possible into the atmosphere in a condition of only a slight odor by providing an outside air-introducing port possible to open and close in a suction path of a solvent-collecting circulation path and a switching damper in a drawout side of a cooling chamber. CONSTITUTION:After a solvent-collecting circulation process is performed by forming a solvent- collecting circulation path 25, an outside air-introducing port 21 is opened by a damper 22, a drawout side of an exhaust path 6 is connected to a cooling chamber 14 by a damper 23, a drawout side of the cooling chamber 14 communicates with the atmosphere through an exhaust air path 19 by switching a damper 24 to be opened and closed, the outside air is supplied to a drying chamber 1 from an introducing port 21, a temperature of the drying chamber 1 is decreased, concentration of an evaporated solvent is diluted, solvent steam and air, exhausted from the drying chamber 1, are introduced to the cooling chamber 14 from the exhaust path 6, the evaporated solvent is liquefied and collected from a solvent collecting path and an outside air introducing process of exhausting cooled air from the exhaust path 19 and an exhaust process are performed, for instance, for 5sec. These outside air-introducing process and solvent-collecting circulation process are alternately performed.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a drying device for clothes, etc., which dry clothes while recovering the solvent from the clothes washed with a petroleum-based dry cleaning solvent. related to things.

(Prior art) Conventional dryers for drying clothes washed with petroleum-based dry cleaning solvents use air heated in a heating chamber, as shown in Japanese Utility Model Application Publication No. 59-73298. is sent to the drying chamber, the air exhausted from the drying chamber is cooled in the cooling chamber, the solvent vapor and moisture contained in the exhaust air are liquefied, and the air from which the solvent vapor has been separated is heated again in the heating chamber. The solvent is circulated and sent to the drying chamber, and the solvent is dried while being recovered.The concentration of the solvent in the circulation path is detected, and the concentration of solvent vapor is detected when the ventilation air stops or the flow rate decreases due to filter clogging. There is a known structure that prevents the solvent vapor from exploding by sucking outside air into the drying chamber and releasing the air that has passed through the drying chamber into the atmosphere when the concentration of solvent vapor is detected to be high enough to cause an explosion. There is.

(Problem to be Solved by the Invention) In the dryer having the above-mentioned conventional structure, when the concentration of solvent vapor increases, outside air is sucked in to dilute the concentration of solvent vapor in the drying chamber, thereby eliminating the risk of explosion. However, the problem is that the solvent vapor is not recovered and is released into the atmosphere while being contained in the exhaust air, resulting in the odor of the solvent vapor.

The present invention was developed in view of the above problems, and the present invention is designed to recover as much of the solvent vapor contained in the discharged air as possible by cooling the air that has passed through the drying chamber before releasing it into the atmosphere. Moreover, even if the discharged air contains some solvent vapor, it is cooled and thus can be discharged into the atmosphere with little odor.

[Structure of the invention]

(Means for Solving the Problems) A drying apparatus for clothes, etc. according to the invention as set forth in claim 1 includes: a drying chamber in which a drying drum is disposed; an exhaust path communicating with an exhaust port of the drying chamber and having a blower; A solvent recovery circulation path is formed by an air intake path that communicates with the air intake port of the drying chamber and has a heating chamber, and a cooling chamber that is connected to an opening between the exhaust path and the air intake path and communicates with a solvent recovery path, and An open/closeable outside air inlet for introducing outside air into the intake path of the solvent recovery circulation path is provided, and a switching damper is provided on the outlet side of the cooling chamber for selectively communicating the air intake path with the outside air side exhaust air path. It is.

The apparatus for drying clothes or the like according to the invention according to claim 2 is the apparatus for drying clothes or the like according to claim 1, wherein the cooling chamber includes a condenser, and the cooling chamber has a see-through device for looking into the inside from the outside. It forms a window.

(Function) The apparatus for drying clothes or the like according to the invention according to claim 1, in order to dry the clothes or the like in the drying chamber, air heated in the heating chamber is sent into the drying chamber to dry the clothes or the like in the drying chamber. The solvent contained in the material to be dried stored in the drum is evaporated, and the water is evaporated, and the air containing this solvent vapor and water is sent to the cooling chamber, where it is cooled and the solvent vapor is liquefied along with the water. The separated and cooled air is heated again in the heating chamber and sent to the drying chamber, and the air is sequentially circulated through the heating chamber, drying chamber, and cooling chamber to recover the solvent. When the concentration of solvent vapor increases, or when outside air is introduced during the solvent recovery circulation process, or when the air in the drying chamber is released into the atmosphere at the end of the drying process, the exhaust air is cooled and released. Therefore, by cooling, the solvent vapor in the air is separated and recovered, increasing the efficiency of solvent recovery.Also, even if there is some solvent in the air, it is cooled.
It has little odor.

In the apparatus for drying clothes and the like according to the second aspect, the inside of the cooling chamber can be easily checked from the outside through the see-through window, and the cooling chamber such as the condenser can be easily maintained and inspected.

(Example) The configuration of an embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a drying chamber, and this drying chamber 1 is rotatably provided with a substantially cylindrical drying drum 2 made of punched metal or the like and having a large number of ventilation holes on its sides. Items to be dried, such as clothes, can be taken in and out of the drying drum 2 from the drying drum 2. And this drying drum 2
A stirring blade 3 for stirring the material to be dried is provided inside.

Further, an exhaust port 4 is opened in the lower part of the drying chamber 1, and an exhaust path 6 provided with an air blower 5 is communicated with the exhaust port 4. Furthermore, an intake lower is opened in the upper part of the drying chamber 1,
A heating chamber 11 provided with a heater 10 having a steam pipe 9 is formed in the intake passage 8 communicating with the intake lower.

Further, the exhaust passage 6 includes a condenser 1 having a cooling water pipe 12.
3 is connected to the cooling chamber 14, and the air intake passage 8 is connected to the outlet side of the cooling chamber 14.

Further, a solvent recovery path 15 is communicated with the lower part of this cooling chamber 14, and a solvent water separator 16 is connected to this solvent recovery path 15. This solvent-water separator 16 has a solvent outlet 17 and a water outlet 18 formed above and below, which separate the solvent and water based on their specific gravity.

Further, an exhaust air passage 19 provided in parallel with the cooling chamber 14 is connected to the outlet side of the exhaust air passage 6, and this exhaust air passage 1! The outlet side of L is opened to the atmosphere.

Further, a Linton filter 20 is provided in the exhaust passage 6 on the suction side of the blower 5.

Further, an outside air introduction port 21 that can be opened and closed to introduce outside air is opened in the intake passage 8, and this outside air introduction port 21 is provided with a first damper 22 that is opened and closed by an air cylinder, a hydraulic cylinder, an electromagnetic device, or the like. It is being

Further, a second damper 23 is provided on the outlet side of the exhaust passage 6 to selectively communicate the exhaust passage 6 with the cooling chamber 14 and the exhaust air passage 19. A third damper 24 is provided on the side to selectively communicate with the intake passage 8 and the exhaust air passage 19, and both dampers 23 and 24 are switched open and closed by an air cylinder, a hydraulic cylinder, or an electromagnetic device. It looks like this.

The drying chamber 1, an exhaust passage 6 communicating with the exhaust port 4 of the drying chamber 1, and a cooling chamber 14 connected to the outlet side of the exhaust passage 6 and connecting the intake passage 8 to the outlet side.
A solvent recovery circuit 25 is thus formed.

Furthermore, the steam pipe 9 of the heater 10 is adjusted! (Lube 2
6 is provided, and by adjusting this adjustment valve 26, the heater 1
0 heats the air to a temperature depending on the material to be dried.

Note that the drying chamber 1 is provided with a nozzle 27 for spraying live steam.

Furthermore, the cooling chamber 14 equipped with the condenser 13 is provided with a see-through window 28 that can be opened and closed so that the inside can be viewed from the outside.

Next, the operation of this embodiment will be explained.

Articles to be dried, such as clothes washed with a petroleum-based dry cleaning solvent, are put into a drying drum 2 of a drying chamber 1. Further, an outside air inlet 21 for introducing outside air into the intake passage 8 is closed by a first damper 22, and a second damper 23
The outlet side of the exhaust passage 6 is communicated with the cooling chamber 14, and
The third damper 24 connects the outlet side of the cooling chamber 14 to the intake passage 8.
A solvent recovery circulation path 25 is formed by communicating with the solvent recovery circuit 25. and,
When steam is circulated through the steam pipe 9 of the heater 10 and the blower 5 is driven, the air heated by the heater 10 in the air intake path 8 is introduced into the drying chamber 1, and the air inside the rotating drying drum 2 is heated. The petroleum-based dry cleaning solvent adhering to the object to be dried is evaporated and the moisture is also evaporated, and the evaporated solvent and moisture are discharged from the exhaust passage 6 to the cooling chamber 1 along with the air.
4, the solvent and water are cooled and liquefied, and the liquefied solvent and water are discharged to the solvent recovery path 15, and the solvent introduced from this solvent recovery path 15 to the solvent water separator 16 has a specific gravity of The water is separated by the difference and recovered from the upper solvent outlet 17, and the water is discharged from the lower water outlet 18. Then, the air from which the solvent and moisture have been separated is introduced into the intake passage 8 and heated again by the heater 10, and this process is sequentially repeated to dry the material to be dried and recover the solvent. Also, during this solvent recovery circulation process, live steam is sprayed from the nozzle 27 into the drying chamber 1 as appropriate.
The humidity in the drying chamber 1 is increased, the material to be dried in the drying drum 2 is moistened, the generation of static electricity is suppressed, and the explosion of solvent vapor due to discharge due to static electricity is prevented.

After this solvent recovery circulation process has been carried out for, for example, 15 minutes, the first damper 22 opens the outside air inlet 21 which continues to introduce outside air into the intake path 8 under timer control, and the second damper 23 exhausts the air. While the outlet side of the cooling chamber 14 remains in communication with the cooling chamber 14, the third damper 24 is switched open and closed to communicate the outlet side of the cooling chamber 14 to the atmosphere via the exhaust air path 19, and then to the drying chamber 1-. Outside air inlet 2 of intake path 8
The outside air is supplied from the drying chamber 1 to lower the temperature of the drying chamber 1 and dilute the concentration of the evaporated solvent to prevent explosion.
The evaporated solvent is liquefied and recovered from the solvent recovery path, and the cooled air is passed through the exhaust air path 19.
The outside air introduction stroke and the exhaust stroke are performed for, for example, 5 seconds. Then, the outside air inlet 21 that introduces outside air into the intake path 8 is closed by the first damper 22, and the second damper 23 is used to close the outside air inlet 21, which introduces outside air into the air intake path 8, while leaving the outlet side of the exhaust path 6 in communication with the cooling chamber 14. Cooling chamber 1 is opened and closed by switching the damper 24 of 3.
The outlet side of 4 is communicated with the intake passage 8, and the solvent recovery circulation process is performed for 30 seconds. The outside air introduction step and the solvent recovery circulation step are alternately performed for, for example, 5 to 10 minutes. In this outside air introduction process, the exhaust air that is exhausted is cooled, so even if it contains some solvent vapor, it is still cooled, increasing the solvent recovery rate and even if the exhaust air contains some solvent vapor. There is little odor.

Further, after performing the cycle operation of the outside air introduction process and the solvent recovery circulation process, the outside air introduction port 21 that introduces outside air into the intake path 8 is closed by the first damper 22 under timer control, and the second damper 23 is closed by the first damper 22. At the same time, the outlet side of the exhaust passage 6 is communicated with the cooling chamber 14, and the third damper 24 is switched open and closed to communicate the outlet side of the cooling chamber 14 with the intake passage 8, and the heater 10 of the intake passage 8 is stopped. and circulate the air cooled in the cooling chamber 14 to the drying chamber 1 by driving the blower 5.
The drying chamber 1 is cooled, and the material to be dried in the drying drum 2 is also cooled. After performing this circulation cooling process for, for example, 5 to 10 minutes, the first damper 22 opens the outside air introduction a2+, which continues to introduce outside air into the intake passage 8 under timer control, and the second damper C- At step 23, the third damper 24 is switched open and closed while the outlet side of the exhaust passage 6 is kept in communication with the cooling chamber 14, and the outlet side of the cooling chamber 14 is communicated with the atmosphere via the exhaust air passage 19, thereby heating. The apparatus 10 is stopped, outside air is supplied to the air intake path 8 from the outside air inlet 21, and while cooling the drying chamber 1 at the outside air temperature, it is cooled in the cooling chamber 14 and exhausted to the atmosphere from the outside air side exhaust air path 19. Drying room 1
The exhaust air is deodorized and the exhaust air is also cooled, reducing the odor of the exhaust air. This deodorizing process is carried out for 1 minute, for example, and the entire drying process is completed.

Further, a temperature sensor 30 is provided in the exhaust passage 6 of the drying chamber 1, and when the temperature sensor 30 detects that the temperature of the exhaust air exhausted from the drying chamber 1 is higher than the set temperature, the temperature sensor 30 According to the signal, the outside air inlet 2
The first damper 22 of the cooling chamber 14 is opened and the outlet side of the cooling chamber 14 is switched, and the second damper 23 is switched so that the outlet side of the cooling chamber 14 is communicated with the outside air exhaust air passage 19.

When the temperature sensor 30 detects a temperature rise above the set temperature during the solvent recovery circulation process, the outside air inlet 21 is opened and the third damper 24 on the outlet side of the cooling chamber 14 is switched to The outlet side of the drying chamber 1 is connected to the outside air exhaust air passage 19 to lower the temperature of the drying chamber 1 and the temperature of the solvent vapor, thereby preventing an explosion. and,
After the outside air introduction stroke for a set time, the outside air introduction port 21 is closed, and the third damper 24 on the outlet side of the cooling chamber 14 is switched to communicate the outlet side of the cooling chamber 14 with the intake passage 8. When this solvent recovery circulation process waits for the set time, the outside air introduction process starts again, and after the solvent recovery circulation process and the outside air introduction process are alternately cycled, the deodorization process is carried out after the cooling process described above. The drying process is completed.

In addition, a concentration sensor for detecting the concentration of solvent vapor is provided in place of the temperature sensor 30, and when a set concentration range in which the concentration of solvent vapor is likely to explode is detected, a signal from the concentration sensor is sent to the outside air inlet 2. and switching the third damper 24 on the outlet side of the cooling chamber 14,
The outlet side of the cooling chamber 14 may also be communicated with the outside air side exhaust air passage 19.

When the concentration sensor 30 detects a solvent vapor concentration range of 1% to 6% during the solvent recovery circulation process, the outside air inlet 21 is opened and the cooling chamber 14 is opened. The third damper 24 on the outlet side is switched so that the outlet side of the cooling chamber 14 is communicated with the outside air exhaust air passage 19, thereby lowering the temperature of the drying chamber 1 and diluting the concentration of solvent vapor to prevent explosion.

Then, after the outside air introduction process for the set time, the outside air introduction port 21
is closed, and the third damper 24 is switched on the outlet side of the cooling chamber 14 to communicate the outlet side of the cooling chamber 14 with the intake passage 8. When this solvent recovery circulation process waits for the set time, the outside air introduction process starts again, and after the solvent recovery circulation process and the outside air introduction process are alternately cycled, the deodorization process is carried out after the cooling process described above. The drying process is completed.

Furthermore, the inside of the cooling chamber 14 can be easily checked from the outside through the see-through window 28, making maintenance and inspection of the cooling chamber such as the condenser easy.

In addition, when drying items to be dried that are washed with water without using a petroleum-based dry cleaning solvent, the first damper 22 opens the outside air inlet 21 that introduces outside air into the air intake path 8, and the second damper 23 The outlet side of the exhaust passage 6 is communicated with the exhaust air passage 19 at the second damper 23, and the introduction side of the intake passage 8 is closed at the second damper 23.

When steam is circulated through the steam pipe 9 of the heater 10 and the blower 5 is driven, the air heated by the heater 10 in the air intake path 8 is introduced into the drying chamber 1, and the rotating drying drum 2 The moisture adhering to the material to be dried inside is evaporated, and the evaporated moisture is exhausted together with air from the exhaust path 6 to the exhaust air path 19 into the atmosphere.

In the above embodiment, the condenser 13 of the cooling chamber 14 uses the cooling water pipe 12, but it is also possible to circulate water cooled by a cooler or other refrigerant.

〔Effect of the invention〕

According to the invention described in claim 1, the air heated in the heating chamber is sent to the drying chamber to evaporate the solvent contained in the material to be dried stored in the drying drum of the drying chamber and also evaporate the moisture. The air containing this solvent evaporation and moisture is sent to the cooling chamber, where it is cooled and the solvent vapor is liquefied and separated along with the moisture.The cooled air is heated again in the heating chamber and sent to the drying chamber. Air is sequentially circulated through the heating chamber, drying chamber, and cooling chamber to recover the solvent, and when the concentration of solvent vapor increases, or when outside air is introduced during the solvent recovery and circulation process, or at the end of the drying process, etc. When the air in the drying room is released into the atmosphere, the exhaust air is cooled and released, so by cooling, the solvent vapor in the air is separated and recovered, increasing the solvent recovery efficiency, and some amount is released into the atmosphere. Even if it contains a lot of solvent, it has little odor because it is cooled.

According to the second aspect of the invention, the inside of the cooling chamber can be easily checked from the outside through the see-through window, and maintenance and inspection of the cooling chamber such as the condenser can be easily performed.

[Brief explanation of drawings]

The figure is a longitudinal sectional view of a drying device showing an embodiment of the present invention. 1. Drying chamber, 2. Drying drum, 4. Exhaust port, 6.
・Exhaust path, 7..Intake port, 8..Intake path, 14..Cooling room, 15..Solvent recovery path, 19..Exhaust air path, 24..
Damper, 28... see-through window.

Claims (2)

[Claims] (1) A drying chamber in which a drying drum is installed, an exhaust path communicating with the exhaust port of the drying chamber and having a blower, an air intake path communicating with the air intake port of the drying chamber and having a heating chamber, and the exhaust path and the intake path. A solvent recovery circulation path is formed by a cooling chamber that is connected in communication with the solvent recovery path and communicates with the solvent recovery path, and an openable and closable outside air inlet is provided for introducing outside air into the intake path of the solvent recovery circulation path. A drying device for clothes, etc., characterized in that a switching damper is provided on the outlet side of the cooling chamber for selectively communicating the air intake path and the outside air side exhaust air path. (2) The apparatus for drying clothes and the like according to claim 1, wherein the cooling chamber is provided with a condenser, and the cooling chamber is formed with a see-through window through which the interior can be viewed from the outside.