JP2634232B2 - Dry cleaning machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dry cleaning machine for monitoring the concentration of a solvent.

(Prior Art) FIG. 4 shows an example of a conventional dry cleaner solvent management apparatus using a compatible binary solvent. FIG. 5 is an example showing the effect of shortening the drying time when the dry cleaner shown in FIG. 4 is used in a solvent replacement type.

Fig. 4 shows a dry cleaner for a single solvent such as terpen, perchlorethylene, which is a high boiling solvent, and 1.1.1 trichloroethane, which is a relatively high boiling solvent, a low boiling solvent tank such as R113, R11, etc. To the treatment tank, and a function to fractionate and regenerate a mixed solution of a high-boiling solvent and a low-boiling solvent, and have mutual solubility from the high-boiling solvent during washing or immediately before drying. This is an example of a dry cleaner in which the drying time is reduced to half by switching to a low boiling point solvent.

Next, in FIG. 4, assuming that the first solvent 4 is a low boiling solvent and the second solvent 4a is a high boiling solvent, a method of exchanging the high boiling solvent 4a and the low boiling solvent 4 during the washing will be described. I do.

. The high-boiling solvent 4a is pumped from the tank 3a by the pump 6 via the valve 5a, and the required amount is sent to the processing tank 10 through the path of the valve 7, the filter 8 or the valve 9.

. The processing dry 11 is slowly rotated, and the high-boiling solvent 4a is circulated in the circuit including the processing tank 10, the button trap 12, the valve 13, the pump 6, the valve 7, the filter 8, and the valve 9 to wash the clothing 2.

. The liquid is discharged through the processing tank 10, the button trap 12, the valve 13, the pump 6, the valve 14, and the distiller 15. Then, the processing drum 11 rotates at a high speed to centrifuge the high-boiling solvent 4a in the clothing 2, Drain similarly.

. A low-boiling solvent 4 is pumped from a tank 3 by a pump 6 via a valve 5, and a required amount is sent to a processing tank 10 via a valve 7, a filter 8 or a valve 9.

. Same as above (however, high-boiling solvent 4a is read as low-boiling solvent 4).

. Same as above (however, high-boiling solvent 4a is read as low-boiling solvent 4).

. The processing drum 11 is slowly rotated again, and a recovery air duct 19 including a fan 16, an air cooler 17, and an air heater 18 is provided.
The air is circulated in the direction of arrow 20 between and the processing tank 10 to dry the clothing 2. The solvent gas evaporated from the garment 2 is condensed in the air cooler 17 and flows into the distiller 15 through the recovery path 21 and the check valve 31.

. When the drying is completed, the dampers 25 and 26 open as indicated by broken lines, take in fresh air from the damper 25, exhaust the uncondensed solvent gas that cannot be recovered by the air cooler 17 from the damper 26, and deodorize the solvent odor in the clothing 2. .

. The mixed solvent (4 + 4a) that has entered the still 15 in the above steps is first distilled at the melting point determined by the low-boiling solvent 4, passed through the condenser 27, and controlled by a distillation temperature sensor (not shown). The water flows into the water separator 22 through the valve 32 that has been opened, and returns to the tank 3 through the solvent pipe 23.

Next, when the low-boiling solvent in the distiller 15 decreases, the boiling point gradually approaches the boiling point of the high-boiling solvent 4a, and the distillation of the high-boiling solvent 4a is started. A sensor (not shown) is operated to open the valve 32a (32 is closed), and the high boiling solvent 4a is recovered in the tank 3a in the same manner as described above (switch from the low boiling solvent to the high boiling solvent) The intermediate solvent at the time of removal is treated as any solvent since it is very small in the experiment and does not pose a practical problem.)

Next, an example of the effect of replacing the high-boiling solvent with the low-boiling solvent immediately before or during the washing as described above will be described with reference to FIG.

Fig. 5 shows that perchlore ethylene is selected as the Takatsu point solvent and R113 is selected as the low boiling point solvent. 10 kg of clothing such as wool knit is washed with perchlorethylene and replaced with Freon R113 immediately before drying, that is, after the perchlorethylene is drained. , About 25
Washing and draining with CFC R113, solvent condensation and recovery curve in the air cooler 17 obtained when drying at a drying temperature of 70 to 80 ° C., washing of 10 kg of clothing such as wool knit with ordinary perchlor ethylene, It is a comparison with that at the time of drying. As is clear from FIG. 5, the drying time can be reduced by half in the case of FIG. 4 as compared with the conventional method. In addition,
Although the detailed description of other combinations such as tarpen and Freon R113 is omitted here, it goes without saying that the same effect as that of the case of perchlorethylene can be obtained.

(Problems to be Solved by the Invention) As described above, the replacement of the solvent in the conventional apparatus has an excellent feature. However, since two kinds of solvents are used in the same machine, the solvent may be lost due to an operation mistake due to an operator's misunderstanding. It cannot be said that there is absolutely no possibility of mixing and entering the solvent tank. Therefore, in practice, it is a fact that the solvent is periodically extracted from the solvent tank as a daily management and the specific gravity of the solvent is measured and confirmed. However, other than the terpene, the specific gravity is close to each other, so that the measurement is difficult, there is a problem that a lot of time and labor are required for the determination, and it is not preferable from the viewpoint of hygiene to remove the solvent.

Conventionally, means for quickly measuring the concentration of the solvent in each solvent tank and displaying the current value, and simultaneously issuing an alarm when the concentration exceeds the allowable concentration range, with high speed and high reliability. There has been no device that confirms that the solvent concentration after mixing is within a desired concentration range and starts cleaning.

The present invention has been proposed to solve the above problems.

(Means for Solving the Problems) For this reason, the present invention provides a solvent storage tank (3a) for storing a high-boiling solvent (4a), a solvent storage tank (3) for storing a low-boiling solvent (4), A drum-type treatment tank (10),
A solvent distillation unit (15) and a solvent supply means for selectively supplying the solvent to the treatment tank (10) are provided. The dry cleaning machine controller (910) controls the designated machine operation sequence (sequence). Based on the ultrasonic sensor (110) and the ultrasonic oscillation receiving means (1), in a dry cleaning machine in which a solvent can be selectively supplied to the processing tank (10) and the clothing (2) can be processed from washing to dewatering and drying. 120) and an ultrasonic propagation time measuring means (20).
0), the temperature detection means (300), and the sound velocity calculation circuit (44
0), a control circuit (410) for controlling the sound wave oscillation receiving means (120) and the ultrasonic wave propagation time measuring means (200), and a sound velocity characteristic storage means (430) indicating the relationship between the ultrasonic wave propagation velocity and the concentration
And an ultrasonic sensor (110) and a temperature detecting means arranged in a plurality of pairs according to the number of measurement places, comprising: a density calculating means (450) for calculating a density based on a sound speed, a temperature of the measuring section and a sound speed characteristic. (300), ultrasonic sensor selecting means (601) for selectively connecting each ultrasonic sensor (110) and ultrasonic oscillation receiving means (120), temperature detecting means (300), and concentration calculating means (450). Temperature detection means selection means (60
2) a sensor selection means (600) composed of 2) and a target value setting means (460) are provided, and according to a selection command of the control circuit (410),
Each sensor pair of the multi-channel type mixed liquid concentration measurement device that can measure the concentration of the mixed liquid corresponding to a plurality of designated locations is connected to a solvent storage tank (3a) for storing a high boiling solvent (4a) and a low boiling solvent The solvent storage tank (3) for storing (4) is provided at the bottom of the processing tank (10), and the input / output of the control circuit (410) and the control device (910) are linked to specify a designated place during operation of the machine. This makes it possible to measure the concentration of the solvent, and this is used as a means for solving the problem.

(Operation) The propagation speed of the sound pressure propagating in the compatible two-component mixed liquid is represented by V = V (t · P) from a measurement example of perchlorethylene and Freon 113, for example.

However, V: sound velocity m / st: temperature ℃ P: concentration vol% or wt% Therefore, if t and V are obtained, P can be obtained by calculation. Also, the ultrasonic wave propagation means and the propagation time measurement means determine the sound wave propagation time τ propagating through the fixed distance L, and the arithmetic and control unit calculates V = L / τ.
P and 1−P are obtained by calculation from the relationship of (t · P). The results are shown on the display. Further, a plurality of ultrasonic sensors and temperature detecting means are selectively switched to obtain a multi-channel type concentration measuring device.

(Embodiments) The present invention will be described below with reference to the embodiments in the drawings.
FIG. 1 shows a multi-channel type concentration measuring and alarming device according to a first embodiment, and FIG. 2 shows a dry cleaning machine equipped with a multi-channel type concentration measuring and alarming device according to a second embodiment.

First, in FIG. 1, 100 is an ultrasonic measuring means, 110 is an ultrasonic sensor, 111 is a transmitter, 112 is a receiver, 120 is an ultrasonic oscillation receiving means, 121 is a high-frequency pulse generating means, 122 is a voltage amplifying means, 200 is a propagation time measuring means, 210 is a received pulse generating means, 211 is an amplification comparing means, 212 is a pulse circuit, 220 is a time counting means, 221 is a clock circuit, 222 is a seed circuit, 30
0 is a temperature detecting means, 400 is an arithmetic and control unit, 410 is a control circuit, 420 is a start signal generating means, 430 is a sound speed characteristic storing means,
Reference numeral 440 is a sound speed calculation circuit, 450 is a density calculation means, and 500 is a display means.

Now, the ultrasonic sensor 110 is installed in the liquid whose concentration is to be measured in pairs with the temperature detecting means 300, and
111 is composed of a piezoelectric body or the like, and when a single pulse voltage having many of the same frequency components as the natural frequency of the piezoelectric body is applied by the high-frequency pulse generating means 121 of the ultrasonic oscillation receiving means 120, Causes a small displacement, which is used as a drive source to induce a strain on the liquid surface in contact with the transmitter 111 and propagate as a wave. The receiver 112 is also formed of a piezoelectric material, and outputs a voltage due to distortion due to sound pressure. This voltage is input to the voltage amplifying unit 122 of the ultrasonic oscillation receiving unit 120, and the amplified voltage Vi is output.

Next, the propagation time measuring means 200 will be described. The transmitting time measuring means 200 is constituted by a reception pulse generating means 210 and a time counting means 220. The receiving pulse generating means 210 amplifies the output voltage of the voltage amplifying means 122 if necessary, and compares it with a threshold value Vs preset in the comparing means 211 to obtain Vi> Vs (βVi> Vs if the gain of Vi is β). If so, output a voltage to the pulse circuit 212,
A pulse is output by the pulse circuit 212.

The time counting means 220 includes a clock circuit 221 and an integrating circuit 222.
Composed of The output of the start signal generating means of the arithmetic and control unit 400 is used as a time starting point, and the high-frequency pulse generating means is used.
The integration of the pulse transmission of 121 and the integration of the clock pulse of the clock circuit 221 is started by the integration circuit 222, and the integration is stopped simultaneously with the output of the pulse from the reception pulse generation means 210, and the integration number N is output.

Further, the arithmetic and control unit 400 includes a control circuit 410 for controlling the entire apparatus, a start means 420 for outputting a start signal in response to a command from the control circuit 410, and a sonic characteristic for storing a sonic characteristic V = V (t · P). The sound velocity V is obtained from the output of the storage means 430 and the propagation time measuring means 200. Is the density P from the detected temperature t of the sound speed calculating circuit 440 and the temperature detecting means 300 calculated by the clock frequency of the clock circuit 221 and the sound speed characteristic V = V (t · P) of the sound speed characteristic storing means 430.
Calculating means 4 for obtaining the following by the inverse operation of P = V ^-1 (tP)
The concentration calculation result is output to the display means 500 together with the type of the measurement liquid. The display means 500 displays the output. When the external trigger R is input to the control circuit 410 in this manner, the density is measured and displayed by the above-described procedure. This measurement can be easily performed by displaying the results of a plurality of measurements as an average value by the configuration of the control circuit.

Further, when the ultrasonic sensor is provided with a selection means 600 comprising sensor selection means 601 and 620, and the control circuit 410 controls to selectively select a corresponding sensor pair, a multi-channel type concentration measuring device is obtained. FIG. 1 shows a multi-channel type concentration measurement alarm device. In the figure, 600 is a selecting means, 601 is an ultrasonic sensor selecting means, 602 is a temperature detecting means selecting means, 460 is a target value setting means, 470 is a comparing means, 700
Is an alarm means.

Now, a selecting means 600 and a warning means 700 for selecting a plurality of ultrasonic sensors and temperature detecting means as a pair are provided, a target value setting means 460 and a comparing means 470 are added to the arithmetic and control unit 400, and the control circuit 410 sets the target value to the target value. A function for setting a target value and a function for controlling the selecting means 600 are added to the setting means 460, and the comparing means 470 is added.
Is configured to compare the output of the agricultural degree calculation means 450 with the target value to determine the presence or absence of an abnormality, and to output an abnormality signal to the alarm means 700 if abnormal.

When a trigger signal R is input from the outside, the control circuit
410 is a predetermined ultrasonic sensor and temperature detecting means selecting means 600
At the same time, the target value is set in the target value setting means 460, and the concentration measurement is started. In addition, density calculation means 45
The output of 0 is compared with the target value by the comparing means 470 to determine the presence or absence of an abnormality.

FIG. 2 shows a dry cleaning machine provided with the multi-channel type concentration measuring and alarming device shown in FIG. In the figure, the respective parts in the dry cleaning machine denoted by reference numerals 1 to 33 are the same as those in FIG. 4, and therefore detailed description thereof will be omitted, and the differences from FIG. 5 will be described. Is a control device of a dry cleaning machine, 920 is a solvent reservoir provided in the processing tank 10, 930 is a solvent recovery pipe, 800 is a multi-channel type concentration measurement alarm device, 300
C, 300A and 300B are ultrasonic sensors, and 100C, 100A and 100B are temperature detecting means.

Now, the multi-channel concentration measurement alarm device 800 is the same as that shown in FIG. 2 except that the external trigger signal of the control circuit 410 and the output of the alarm means 700 are connected in cooperation with the control device 910 of the dry cleaning machine. Basically the same.

In addition, the dry cleaning machine 900 is provided with a solvent reservoir 920 and a solvent discharge pipe 930 at the bottom of the processing tank 10, and a pair of ultrasonic sensors and temperature sensors in the solvent tanks 3a and 3 and the solvent reservoir 920, respectively. Except that 100C, 300C, 100B, and 300B are provided, it is the same as the conventional example of FIG. On the other hand, the control circuit 410 of the arithmetic and control means 400 of the concentration measurement and alarm device starts the measurement by using the command of the control device 910 of the dry cleaning machine 900 as an external trigger input, and controls the output of the alarm means 700 to control if there is any abnormality. A command can be sent to the device 910 to perform processing such as stopping the machine. In addition, the desired concentration in the tank can be known as the cleaning process of the dry cleaning proceeds. Further, the sonic velocity characteristic storage means 430 sets the sonic velocity characteristics of a plurality of types of two-component mixed liquids, and the target value setting means 460 sets corresponding target values, and the control circuit 410 controls the type of solvent used in the dry cleaning machine. It is possible to realize the selection by using the current data processing technology.

Here, the constituent means of the two-component mixed liquid concentration measuring device will be described.

(1) The propagation speed of sound pressure propagating in a compatible binary liquid mixture is expressed by V = V (t · P), for example, as shown in the measurement example of perchlor ethylene and fluorocarbon 113 shown in FIG. It is.

However, V: sound velocity m / st: temperature ℃ P: concentration vol% or wt% Therefore, if t and V are obtained, P can be obtained by calculation.

(2) The ultrasonic wave propagation means 100 and the propagation time measurement means 200 determine the sound wave propagation time τ propagating through the fixed distance L, and the arithmetic and control unit 400 calculates V = L / τ. P and 1−P are obtained by calculation from the relationship of V (t · P). The result is shown on display means 500.

(3) A plurality of ultrasonic sensors 110 and temperature detecting means 300 are selectively switched to obtain a multi-channel type concentration measuring device.

(Effects of the Invention) As described in detail above, the present invention is configured, so that by simply installing a plurality of sound speed sensors and temperature sensors in pairs, it is possible to measure the concentration of the solvent at a plurality of different locations and to reduce the cost. Can be provided. Further, since the measurement time is shortened, there is no problem that the cycle time is lengthened when applied to a dry cleaning machine. Further, in the case of a dry cleaning machine, clothing accidents due to poor solvent concentration can be prevented.

The present invention is characterized in that a plurality of detection ends are arranged, the detection ends are selectively switched, and the concentration at a designated position can be selectively detected. In a cleaning machine, by installing a concentration measuring device in the storage tank of each solvent and the processing tank in which each solvent is alternately injected, only the detection end is selectively switched, and the state corresponding to the machine operation cycle is changed. It is possible to easily manage whether or not there is an abnormality in the concentration of each of the solvent storage tanks, which may change due to the changing solvent concentration in the treatment tank and the branching accuracy of the still.

In particular, while ultrasonic transmission time measuring means, ultrasonic oscillation receiving means, the main part of the arithmetic control means in common, selectively manage the concentration of the desired required location during the operation of the machine,
If necessary, it is possible to provide a dry cleaning machine that can easily perform an alarm.

[Brief description of the drawings]

FIG. 1 is a block diagram of a multi-channel type concentration measuring and alarming device showing an embodiment of the present invention, FIG. 2 is a block diagram when applied to the dry cleaning machine, and FIG. 3 is a characteristic showing a measurement example of sound speed characteristics. FIG. 4 is a circuit diagram of a conventional dry cleaning machine, and FIG. 5 is a diagram illustrating an example of the effect of using two conventional solvents. Description of main parts in the drawing 100 ultrasonic measuring means 111 transmitting element 112 receiving element 111 'transmitting and receiving element 112' reflecting plate 121 high frequency pulse generating means 122 voltage amplifying means 200 propagation time measuring means 210 received pulse generating means 211 comparing means 212 pulse circuit 220 time counting means 221 clock circuit 222 integrating circuit 300 temperature detecting means 400 Calculation control means 410 Control circuit 420 Start signal generation means 430 Sound velocity characteristic storage means 440 Sound velocity calculation circuit 450 Density calculation means 500 Display means

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Toshio Hattori No. 1, Iwa-tsuka ▼ -machi, Takamichi, Nakamura-ku, Nagoya-shi, Aichi Nagoya Laboratory, Mitsubishi Heavy Industries, Ltd. (56) References JP-A-2-203899 (JP) , A) Actually open 1988-111890 (JP, U)

Claims (1)

(57) [Claims] A solvent storage tank (3a) for storing a high-boiling solvent (4a), a solvent storage tank (3) for storing a low-boiling solvent (4), a rotary drum type processing tank (10), A solvent distillation unit (15) and a solvent supply means for selectively supplying the solvent to the treatment tank (10) are provided. The dry cleaning machine controller (910) controls the designated machine operation sequence (sequence). Based on the ultrasonic sensor (11), in a dry cleaning machine in which the solvent (2) can be processed from washing to dewatering and drying by selectively supplying a solvent to the processing tank (10).
0), an ultrasonic measuring means (100) comprising an ultrasonic oscillation receiving means (120), an ultrasonic wave propagation time measuring means (200), a temperature detecting means (300), a sound velocity calculation circuit (440), a sound wave Oscillation receiving means (120) and ultrasonic propagation time measuring means (200)
Control circuit (410), and a sound speed characteristic storage unit (430) indicating the relationship between the propagation speed of ultrasonic waves and the concentration, and a concentration calculation unit (450) for calculating the concentration based on the sound speed, the temperature of the measuring unit, and the sound speed characteristics And ultrasonic sensors (110) and temperature detecting means (300) arranged in pairs in accordance with the number of measurement locations.
And each ultrasonic sensor (110) and ultrasonic oscillation receiving means (12
(0) and a sensor selection means (602) comprising temperature detection means selection means (602) for selectively connecting temperature detection means (300) and concentration calculation means (450). 600) and target value setting means (460)
According to the selection command of the control circuit (410), each sensor pair of the multi-channel type mixed liquid concentration measuring device capable of measuring the concentration of the mixed liquid corresponding to a plurality of designated locations is connected to the high boiling solvent (4a). The solvent storage tank (3a) for storing the solvent, the solvent storage tank (3) for storing the low boiling point solvent (4), and the treatment tank (1
0) A dry cleaning machine which is provided at the bottom of the apparatus and which enables the measurement of the solvent concentration at a designated place during operation of the machine by linking the input / output of the control circuit (410) and the input / output of the control device (910).