JPS6329517Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dry cleaner with improved solvent distillation performance.

The solvent in dry cleaners is used repeatedly, so when it becomes dirty, it is recycled in a distiller and used again. However, when distillation approaches the end and most of the solvent in the still is distilled, the inside of the still reaches saturated vapor pressure, and the remaining small amount of solvent gas and the solvent contained in the residue are difficult to remove from the still. The distillation time was long, and solvent vapor often leaked into the workplace when removing the residue after distillation.

This method connects the drying air passage for laundry drying and the distiller with a ventilation pipe, allowing air to flow into the distiller and pushing out the solvent gas, while also removing the solvent gas contained in the residue remaining at the bottom of the distiller. Even with a small amount of solvent present, the evaporation is accelerated and the distillation performance is improved.

To explain based on the following examples, 1 is a washing tub;
2 is a solvent tank, and 3 is a liquid supply pump. When washing starts, the liquid supply pump 3 supplies the solvent in the solvent tank 2 to the washing tub 1 through a one-way valve 4 and a solenoid valve 5. Reference numeral 6 denotes a drain pump provided in the solvent passage 7. During the washing operation, the drain pump circulates the solvent in the washing tub 1 through the one-way valve 8 and the solenoid valve 5.

Reference numeral 9 denotes a drying ventilation passage whose both ends are connected to the washing tub 1, and a filter 10, a float switch 11, a blower 12, a condenser 13, and a heater 14 are provided in the ventilation passage. During the above-mentioned washing operation, the solvent enters the drying ventilation passage 9 up to the position of the float switch 11, and the solvent level in the washing tub 1 is controlled by the float switch 11. The heater 14 has a meandering shape, and one end thereof is connected to a distiller 15, which will be described later, and the other end is connected to a water separator 16, which is further connected to the solvent tank 2. There is. On the other hand, condenser 1
3 has a meandering shape, one end of which connects to the outflow side A of the water chiller, and the other end of which connects the inflow of the water chiller through the cooling coil 17 in the water separator 16 and the cooling coil 18 in the solvent tank 2. Connected to side B. Reference numeral 19 denotes a solvent recovery pipe for recovering the solvent condensed in the condenser 13, which once collects the solvent in the collected liquid collecting tank 20 and then flows it to the water separator 16 via the electromagnetic valve 21. . Reference numerals 22 and 23 are an intake valve and an exhaust valve, respectively, which are located at the positions indicated by the broken lines in the figure during the drying process, and close the intake port 24 and exhaust port 25 provided in the drying ventilation path.
During the deodorizing process after the drying process, the position is switched to the solid line position shown in the figure, and the drying air passage 9 is shut off, while at the same time the intake port 24 and the exhaust port 25 are opened. 26 is a motor that drives the blower 12.

The distiller 15 connects the outlet 27 of the evaporated solvent vapor to the heater 14, and
The solvent inlet 28 is connected to the solvent passage 7 via a solenoid valve 29, and is connected to the drying ventilation passage 9 and the blower 12 by a ventilation pipe 31 having a check valve 30.
It is connected on the leeward side of the Also, this distiller 15
Inside is a distillation chamber 33 and a heating chamber 34 via a partition plate 32
This heating chamber is provided with an electric heater 35, which heats the water in the heating chamber, and uses the steam to heat the solvent in the distillation chamber 33. 36 is a pressure switch for detecting the pressure inside the heating chamber 34. In the above configuration, when the washing process and the deliquifying process are completed, the solvent is distilled at the same time as the drying process begins. That is, when the washing process is completed, the drain pump 6 rotates, and the solvent in the washing tub 1 enters the distillation chamber 33 through the electromagnetic valve 29. The same applies during the deliquoring process.
On the other hand, the electric heater 3 of the distiller is
5 is energized and generates steam in the heating chamber 34. Therefore, the solvent that has entered the distillation chamber 33 is heated by the vapor, evaporates, and flows into the heater 14 through the solvent vapor outlet 27. Meanwhile, at this time, the blower 12 is rotating and cold water is flowing from the water chiller to the condenser 13. Therefore, the blower 12
The air sucked into the drying air passage 9 from the washing tub 1 by the above condenses the solvent contained in the air when passing through the condenser 13, and this condensed solvent is collected in the collected liquid collecting tank 20. When the solenoid valve 21 is opened after the drying process is completed, the water flows to the water separator 16 and is further collected in the solvent tank 2. On the other hand, the air that has passed through the condenser 13 passes through the heater 14 . As described above, the high temperature solvent vapor evaporated from the distiller 15 is flowing through the heater 14.
4 is getting hot. Therefore, the air is heated when passing through the heater 14, and is blown into the washing tub 1 as hot air to evaporate the solvent from the clothes in the washing tub and dry the clothes. On the other hand, the solvent vapor flowing through the heater is condensed by dissipating heat in the heater 14, and is further condensed in the water separator 1.
6. The solvent that has entered the water separator 16 is further cooled by a coil 17 and is recovered into the solvent tank 2 after separating water. This drying process continues until the distillation is complete. That is, when the distillation is completed and the solvent in the distillation chamber 33 disappears, the pressure in the heating chamber 34 rises rapidly, so the pressure switch 3
6 is detected and the drying process and distillation are completed.

However, near the end of the drying process, distillation chamber 3
A large amount of residue is deposited in the 3, and the solvent contained in this residue is difficult to completely evaporate. In this case, a part of the air flow flowing through the circulation ventilation passage 9 is blown into the distillation chamber 33 through the ventilation pipe 31, and this air evaporates the solvent remaining in the residue. Since the solvent gas filling the distillation chamber 33 is pushed out from the outlet 27, the distillation is completed in a short time. Note that the ventilation pipe 3
The solvent evaporated from the clothes in the washing tub 1 also flows into the washing tub 1, but this is not a problem because it flows out from the solvent vapor outlet 27 of the distiller to the heater 14 side and is condensed.

Note that if the check valve 30 interposed in the ventilation pipe 31 is omitted and one end of this ventilation pipe is connected to the upwind side of the blower 12 in the hot air circulation ventilation path, most of the solvent gas in the distillation chamber 33 will be absorbed by this ventilation. Since the solvent vapor is sucked out through the pipe 31, distillation can be promoted in this case as well, but since less solvent vapor flows into the heater 14, the amount of heat generated by the heater 14 is reduced, and the laundry drying efficiency is reduced. descend. Therefore, in the case of this embodiment, the ventilation pipe 31 cannot be connected to the windward side of the blower 12, but as in many dry cleaners, the hot water boiler installed separately in the heater 14 may If the heater is an electric heater, the ventilation pipe 3
1 can be connected to the windward side of the blower 17.

As described above, in this case, the distiller and the hot air circulation air passage are connected by a ventilation pipe, so air flows into or out of the distiller through this ventilation pipe, and the solvent vapor filling the distiller is removed. This allows for quick ejection of the residue from the still and promotes the evaporation of the solvent remaining in the residue, so that distillation is completed in a short period of time. Even when opened, almost no solvent vapor leaks into the workplace, which is very effective.

[Brief explanation of the drawing]

The drawing is a solvent circuit diagram of the dry cleaner of the present invention. 9... Drying ventilation channel, 15... Distiller, 31...
Ventilation pipe, 12...Blower, 14...Heater.

Claims (1)

[Scope of utility model registration request] A drying ventilation passage having a heater, a condenser, and a blower and connected to a washing tub at both ends, and a distiller that heats and distills the dirty solvent and supplies solvent vapor to the heater as a heat medium, A dry cleaner characterized in that a drying ventilation passage on the leeward side of the blower and the distiller are connected by an independent ventilation pipe.