JPS6137435Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device that detects the end of drying in the clothes drying process of a dry cleaning machine that uses organic solvents such as perchlorethylene, 1,1,1 trichloroethane, and R113. .

To outline the conventional dry cleaning process using FIG. 1, when the clothes 2 are put in through the door 1, the door 1 is closed, and the operation is started, the process generally proceeds in the following order.

The solvent 4 is pumped up from the solvent tank 3 through the valve 5 by the pump 6, and the required amount of the solvent 4 is sent into the processing tank 10 through the path consisting of the valve 7 and the filter 8 or the path consisting of the valve 9.

Gently rotate the processing drum 11 and pour the solvent 4 into the processing tank 10, button trap 12, valve 13,
The clothes 2 are washed by circulation through a circuit consisting of a pump 6, a valve 7, a filter 8, or a valve 9.

Processing tank 11, button trap 12, valve 1
3, the liquid is drained through the path of the pump 6, the valve 14, and the distiller 15, and then the processing drum 11 rotates at high speed to centrifugally separate the solvent 4 in the clothing 2, and the liquid is drained in the same way.

, repeat the process.

Processing tank 11, button trap 12, valve 1
3. Drain the liquid into the solvent tank 3 through the route of the valve 5,
Subsequently, the processing drum 11 rotates at high speed to remove the clothing 2.
The solvent 4 inside is centrifuged and drained.

The processing drum 11 is slowly rotated again, air is circulated in the direction of the arrow 20 between the recovery air duct 19 consisting of the fan 16, the air cooler 17, and the air heater 18 and the processing tank 10, and the clothes 2 are dried. The solvent gas evaporated from the clothing 2 is condensed in the air cooler 17, enters the water separator 22 through the recovery path 21, and enters the clean tank 24 through the solvent pipe 23.

When drying is completed, dampers 25 and 26 open as shown by broken lines, fresh air is taken in from the damper 25, and uncondensed solvent gas that cannot be recovered by the air cooler 17 is exhausted from the damper 26, thereby deodorizing the solvent odor in the clothing 2.

The solvent 4 that entered the distiller 15 in the process is evaporated, condensed and recovered in the condenser 27, and passed through the water separator 22 and solvent pipe 23 to the clean tank 2.
4 and returns to the solvent tank 3 through the overflow partition plate 28.

Note that the water separated by the water separator 22 is discharged to the outside of the system through a water pipe 29.

Next, the drying process will be described in detail. The drying process is performed by circulating air between the recovery air duct 19 and the processing tank 10, as outlined above. That is, the circulating air is supplied to the air heater 1.
8 and sprayed onto the clothing 2. The solvent remaining in the clothing 2 is evaporated by the heated air, and the concentration of the solvent gas is approximately equal to the saturated concentration of the solvent gas at the temperature of the air passing through the clothing 2.

The evaporated solvent gas is sent to the air cooler 17,
The concentration drops to the saturation concentration determined by the air temperature at the outlet of the air cooler, and the difference is condensed and collected. The flow rate of the solvent recovered by the air cooler 17 changes as shown in FIG. 2, and in this example, the recovery rate drops significantly after 10 minutes, so 10 minutes is considered to be an appropriate drying time. That is, the end of the drying can be determined by correctly detecting that the flow rate of the recovered solvent in the air cooler has fallen below a certain value.

Conventionally, based on this idea, a detection device with an orifice or throat portion as shown in FIGS. This device has a fatal flaw in that it adheres to the orifice and throat, causing malfunction, and is currently not in practical use.

Currently, the most commonly used equipment is () Simply fixing the drying time.

() There are clothes that dry for a certain period of time after the temperature of the air passing through them reaches a certain value.

By the way, since the above method () fixes the drying time regardless of the type or amount of clothing, the drying time inevitably becomes longer, and depending on the type of clothing, damage may occur due to overheating. It also leads to wasted energy. Although () somewhat compensates for the shortcomings of (), it is not sufficient.

The present invention was proposed in order to eliminate the above-mentioned drawbacks of the conventional methods, and focuses on changes in the flow rate of recovered solvent in air coolers, eliminates the orifice and throat part that had been a problem in the past, and eliminates the time required to fill a certain volume. As a metering system, it is a device that stably and accurately detects the end of drying over a long period of time, and the end-of-drying sensor automatically obtains the appropriate drying time depending on the type and amount of clothing, which saves energy. The aim is to provide the equipment.

Embodiments of the present invention will be described below with reference to the drawings.In order to make the present invention clearer, a conventionally known drying completion sensing device will first be described with reference to FIGS. 3 and 4. In FIG. While the flow rate of solvent flowing from the drain is large, it is not enough to discharge it only from the throat 31, and the solvent overflows from the overflow pipe 32, the float 33 is lifted upward, and the limit switch 34 is turned off.
When the solvent flow rate decreases, the float 33 lowers,
The limit switch 34 is turned on to notify the end of drying.

In FIG. 4, while the amount of solvent flowing through the solvent inflow pipe 35 is large, the diaphragm 37 is pushed down by overcoming the force of the coil spring 36, and the rod 38 fixed to the diaphragm 37 pushes the limit switch 39, and the solvent flows in the shape of a needle valve. When the flow rate decreases, the force pushing down the diaphragm 37 decreases, the rod 38 lowers, and the limit switch 39 returns to its original position, signaling the end of drying. However, the devices shown in FIGS. 3 and 4 have the disadvantage of malfunctioning as described above.
It lacked reliability.

FIG. 5 is a system diagram of an example of a drying completion sensing device according to an embodiment of the present invention. In the figure, when drying begins, the solvent condensed in an air cooler (not shown) flows into the measuring chamber 102 through a simple water separation pipe 101, but periodically by a timer 111 attached to the lower part of the measuring chamber 102 and controlling opening and closing. Since the automatic valve 103 that opens and closes is closed, the water overflows the metering chamber 102 and flows through the overflow pipe 104 and the discharge pipe 105 to the water separator 22. The water separated from the solvent by the simple water separation pipe 101 passes through the water discharge pipe 106, joins the discharge pipe 105, and flows to the water separator 22.

Moisture drain pipe 106 and solvent overflow pipe 104
A ventilation pipe 107 connecting between the two, a float switch (proximity switch) 108 provided in the measuring chamber 102,
A solvent amount adjusting spacer 109 provided at the bottom of the measuring chamber 102 and a manual drain valve 110 for cleaning are provided at the bottom of the simple water separation pipe 101. Note that if the outer cylinder of the measuring chamber 102 is made of a transparent material such as glass, the operating state of the float switch 108 can be observed.

When drying begins, the condensed solvent and water are removed by an air cooler (not shown) using the simple water separation pipe 10.
1, the solvent and water are separated by the difference in specific gravity, and the solvent flows into the measuring chamber 102. When an automatic valve 103 provided at the bottom of the metering chamber 102 that opens and closes periodically closes, the solvent gradually accumulates in the metering chamber 102, and the float of the float switch 108 floats to operate the switch. If left as it is, the measuring chamber 102 will be filled with solvent and will flow into the overflow pipe 104. automatic valve 10
3 opens, the solvent in the measuring chamber will drain into the drain pipe 10 in a short time.
5, the float of the float switch 108 descends and the switch returns to normal.The time from when the automatic valve 103 closes until the float floats up and the switch operates is equal to the timer setting time. Drying ends when this point is exceeded. This operation will be further explained using the time chart in FIG. 6. When drying starts, a timer 111 that controls the opening and closing of the automatic valve 103 starts operating.
As shown in the figure, the automatic valve 103 is closed for 41 seconds and opened for 6 seconds, and at the same time as the automatic valve 103 is closed, a separately provided setting timer (not shown) starts operating. This timer is said to be OFF for 39 seconds and ON for 2 seconds. If the float switch 108 rises within 39 seconds when the setting timer operates and the switch operates, the automatic valve 103 and the setting timer (not shown) repeat the above operation, and the floating of the float switch 108 reaches the setting timer (not shown). ) is activated for 39 seconds to notify the end of drying.

It goes without saying that the operating time of the automatic valve and the timer setting time can be freely changed depending on the capacity of the washing machine, the capacity of the measuring chamber, and the required degree of drying of clothes.

As described above, according to this embodiment, since there is no throat or orifice structure found in conventional devices, there is no fear of clogging due to lint or the like or poor accuracy, and stable operation can be obtained over a long period of time. In addition, since changes in the flow rate of the recovered solvent in the air cooler are detected, the appropriate drying time is automatically obtained depending on the type and amount of clothing, eliminating the risk of damage due to overheating, wasted energy, and problems due to insufficient drying. It can produce various excellent effects such as.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an example of a conventional dry cleaning machine, Fig. 2 is a diagram showing the relationship between drying time and recovered solvent flow rate in Fig. 1, and Figs. 3 and 4 are respectively conventional dry cleaning machines. A vertical sectional view of a known drying end sensing device, FIG. 5 is a system diagram showing a drying end sensing device according to an embodiment of the present invention, and FIG. 6 is an explanatory diagram showing a time chart of each device in FIG. 5. It is. 102...Measuring chamber, 103...Automatic valve, 108
...Float switch, 111...Timer.

Claims (1)

[Scope of utility model registration request] In a device that detects fluctuations in the degree of recovery of a solvent condensed and recovered by a condenser of a dry cleaner that uses a solvent, and detects the end of drying work based on the detection result, the recovered solvent is transferred to a water separator. An automatic valve connected to an opening/closing control device is provided in the middle of a solvent passage leading to A drying end sensing device comprising a detecting device that detects the time when a float switch is activated after a valve closes and outputs a drying end signal when the time exceeds a preset time.