JP3091658B2 - Dry cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a petroleum-based solvent as a washing liquid to perform various steps such as washing clothes, removing solvent from clothes, and drying clothes in a single rotating drum. Regarding dry cleaner.

[0002]

2. Description of the Related Art Generally, a dry cleaner of this type supplies a solvent into a drum to wash clothes, drains the solvent from the drum to a tank, and rotates the drum at a high speed. To drain the clothing. Then the clothes are dried. The solvent used during supply is supplied from the tank to the drum via a pump, and the solvent being cleaned is usually circulated from the drum to the drum via a pump and filter. For ease of installation, a self-contained pump is often employed while being installed above the tank.

However, when such a self-contained pump is employed, and the solvent is steadily discharged from the drum to the tank during the liquid removal process, the pump sucks air from the tank. If the amount of the solvent in the pump (casing) is excessively reduced, the pump cannot run on its own during the next step, for example, during the cleaning step during the drying step, even if the solvent is sucked from the tank. Thus, one of the main objects of the present invention is to provide a dry cleaner capable of improving the self-sufficiency of a pump and preventing idling.

[0004]

SUMMARY OF THE INVENTION According to the present invention, there is provided a drum for receiving a supply of a cleaning liquid and containing clothes, a tank for the cleaning liquid, a pump, a liquid supply path, and a liquid supply path provided in the liquid supply path.
Was off valve (switching valve), before the cleaning liquid from said tank
Serial pump, supplied to the drum via the liquid supply passage, a cleaning means for cleaning the garment by rotating thereafter said drum, the washing solution was centrifuged deliquor the drum is rotated at a high speed,
And a drainer for draining the tank through the pump cleaning fluid, the cleaning, the dry cleaner and a driving means for sequentially driving control drainer, said pump is a self-contained pump, and at least a portion of the downstream side the liquid supply path from the on-off valve (switching valve) is positioned above said pump, said operating means a predetermined time after the end of draining step, to stop the pump, and wherein On-off valve (switch
The present invention provides a dry cleaner characterized by executing a pump self-sufficiency performance increasing step of opening a valve .

That is, in the present invention, the pump is stopped and the switching valve provided at the inlet of the liquid supply passage is opened for a certain period of time after the end of the liquid removal process, so that the solvent in the opened flow passage is reduced.
The head naturally flows into the pump due to the head, thereby increasing the original self-sufficiency performance of the self-contained pump.

In the present invention, a self-contained pump is used as a pump for circulating the solvent. This self-contained pump is configured such that when the operation is stopped and stable, the liquid is always kept in the casing, and when the normal operation is started, even if there is some air in the casing and in the suction pipe, This is a pump that can be sent to the discharge port side to perform water absorption and discharge within a relatively short time. However, when air is sucked too much or in an unstable state immediately after sucking air, the self-sufficiency performance is reduced.

In the present invention, the switching valve is provided at the flow path between the pump and the drum, that is, at the inlet of the liquid supply path, and at least a part of the liquid supply path downstream of the switching valve is disposed above the pump. Is done. And the liquid supply path is a filter (pipe),
The filter is constituted by a bypass which short-circuits the inlet and outlet of the filter, and a pair of switching valves (opening / closing valves) is desirably provided at each inlet of the filter and the bypass. Is switched through a filter, a bypass path, or both.
Since the filter gets dirty, it is more desirable to open only the bypass path by the switching valve so that the dust does not flow backward. The filter is configured so that the filter material (for example, activated carbon) itself can be replaced.

In the present invention, the pump self-sufficient performance improvement step is a step performed before the drying step, in which the pump is stopped and the switching valve is opened for a fixed time (preferably 10 to 20 seconds). A normal on-off valve can be used as the switching valve. Instead of the switching valve, a three-way switching valve may be adopted. Usually, the amount of liquid that can secure the self-sufficiency of the pump is, for example, about 1000 CC, and the amount of liquid that can be absorbed is, for example, 500 CC.
cc shortage. Therefore, in this example, it is necessary to flow 500 cc or more of the solvent into the stopped pump by the opening / closing operation of the switching valve.

In the present invention, the washing means for supplying a solvent to a drum for accommodating the clothes to wash the clothes means that the drum is rotatably installed in the outer tank body so that the axis is substantially horizontal, and the drum is attached to the drum. This is a means for supplying a solvent as a cleaning liquid to a depth of about 1/6 of the diameter, rotating the drum forward / reverse (inverted) for several seconds at a rotation speed of 30 to 50 rpm, and performing a process of tapping and washing clothes. Therefore, the washing means includes a solvent tank, a liquid supply path (preferably a pipe including a filter and a bypass path of the filter) and a pump for circulating the solvent between the solvent tank and the drum, and the solvent is pumped and supplied from the solvent tank. The clothes are supplied to the drum through a liquid passage (in a specific example, a bypass passage), and then the drum is rotated, and the solvent is circulated from the drum to the drum through a pump and a filter to wash the clothes. Further, in order to rotate the drum, it is preferable to include a drum motor, a pulley and a pulley belt for transmitting the rotational power of the motor to the drum. Further, as the drum motor, in addition to the rotation in the washing step, a motor whose speed is variable, for example, an inverter control motor is preferable so as to be able to cope with a high-speed rotation in a liquid removal step described later.

The solvent used as the cleaning liquid in the present invention is mainly a flammable petroleum-based solvent, for example, the second petroleum-based industrial gasoline No. 5. The higher the temperature of the solvent used in the cleaning process, the higher the cleaning ability. However, since the solvent is flammable, the solvent temperature is kept below the flash point (43 ° C. in the case of gasoline No. 5) and vaporized. It is necessary to suppress the gas concentration of the solvent to the lower explosive limit concentration (0.6 vol% in the case of gasoline No. 5).

In the present invention, the liquid removing means for draining the solvent in the drum and rotating the drum at a high speed to perform centrifugal dewatering is operated after the washing step and before the drying step, and adheres to clothes. High-speed rotation (600-700)
(outer tank main body), and is separated out of the drum (outer tank main body) together with the solvent in the (outer tank main body) and other drums. Therefore, the liquid removing means preferably includes a drain valve (drain port and its on-off valve) at the bottom of the drum (outer tank main body), and further sends the drain liquid (solvent) to the solvent tank via a filter by a pump. Preferably, it can be reused.

After the self-sufficient power boosting step of the pump is completed, a drying step is performed in which drying air is supplied to the drum to dry the clothes. The drying means includes the solvent gas concentration in the drum and the drying efficiency. Means to supply hot air or hot air to the drum in a safe and appropriate temperature range with consideration given to it.These are branched from the outer tank body, returned to the outer tank body via a blower, and supplied to the drum. A circulation path or a circulation air path that collects the dried air and supplies it to the drum again, a blower, and a drying heater provided in the circulation air path to control the temperature of the dried air can be configured. Further, when a drying cooler is provided in the circulation air passage, drying is promoted and temperature control is further facilitated. Examples of the heat source of the drying heater include steam and an electric heater. In view of safety and heat exchange efficiency, steam (superheated steam) at 100 to 130 ° C. is preferable.

In the present invention, the drying heater for heating the drying air is operated not only in the drying step but also in the dewatering step, and heats and preheats the air flowing into the drum as a preheating step. It is preferable that a heat medium passage is provided in the passage of the drying air.

Since the drying air heated by the drying heater becomes dangerous when the temperature becomes high, a drying air temperature detecting sensor for detecting the drying air temperature is provided to set a predetermined temperature (for example, 40 ° C.).
It is preferable that the operation of the drying heater is stopped when the temperature rises to more than (° C.). This temperature detection sensor can be configured by, for example, providing a thermistor or a thermocouple in the drying air path. Further, since it can be used to detect the temperature of the air flowing into the drum during the liquid removal process, it is preferably provided downstream of the drying heater and in the vicinity of the drying heater.

The operation means for sequentially controlling the operation of the washing, draining and drying means is an electric control device for executing a process according to a preset program.
A microcomputer including a U, a ROM, a RAM, and an I / O port can be used.

The drying heater is not only used during the drying process,
By operating even during the dewatering process in the preceding process, the air flowing into the drum can be heated and preheated (preheating process), whereby the rise of the drying temperature in the drying process becomes faster. The wind flowing into the drum is generated not through the blower but through the circulation path facing the negative pressure portion due to the negative pressure generated in the drum based on the high-speed rotation of the drum. When the blower is operated, the drying power is strong, so that the clothes adhered to the drum during the dewatering process are too strong and wrinkled in that state. Of course, the blower can be rotated at a low speed, but this requires rotation control (such as inverter control), which leads to an increase in cost.

As described above, the temperature of the heated air flowing into the drum during the liquid removal process is detected by the temperature sensor, and when the temperature is equal to or higher than the preset temperature, the operation of the drying heater is stopped. Danger such as ignition or explosion of solvent gas can be prevented. This temperature detection sensor detects the temperature of the circulating drying air flowing into the drum during the drying process, and stops the operation of the drying heater when the detected temperature exceeds a preset temperature. It is convenient if it also serves as

When the drying heater uses steam as its heat source, the drain can be removed by the preheating step in the dewatering step, thereby enabling a smooth operation in the next drying step.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments shown in the drawings. It should be noted that the present invention is not limited by this. FIG. 1 is an external perspective view of a dry cleaner using a petroleum-based solvent, 100 is a dry cleaner main body, 101 is a door that opens and closes a clothing slot, 102 is a door handle, 103 is a door frame, 104 is a door glass, and 105 is a door glass. A front panel, PS is a power switch, 34 is a keyboard, and 35 is a display panel.

FIG. 2 is an explanatory view of the structure of the dry cleaner shown in FIG. 1, wherein 1 is a drum for accommodating clothes, and 2 is an outer tub main body. The drum 1 is formed in a cylindrical shape having a large number of holes opened in a peripheral wall, and is rotatably supported horizontally in the outer tank main body 2. In the outer tank body 2, a circulation path 3 for air and a vaporized solvent and a drain pipe 4 for a solvent liquid are provided outside a cylindrical portion covering the outer periphery of the drum 1.

[0021] circulating path 3 is inside or passage wall to the drum outlet temperature sensor SE ₄ along which the blower 5, an exhaust port 6, cooler 7, the cooler outlet temperature sensor SE _5, the intake valve 8, drying heater 9 and the drum inlet temperature sensor SE ₆ are arranged in this order. It is to be noted that the temperature sensor SE ₄ ~
SE ₆ is composed of a thermistor.

A drain pipe 4 is provided at the bottom of the outer tank body 2.
The interposed therebetween button trap 10 to the solvent liquid level sensor SE ₁ and the drum 1 for detecting the solvent level in the drum 1 is provided with a liquid level sensor SE ₇ for detecting that discharged
Are connected. The button trap 10 is a type of filter for removing solid matter such as buttons for clothes contained in the solvent discharged from the drum 1.

After introducing the cooling water supplied from the cooling water source W, the cooler 7 returns the cooling water to the cooling water source W, thereby cooling the air flowing in the circulation path 3 and the vaporized solvent, and removing the solvent. It is designed to condense and liquefy. The liquefied solvent, after water is removed through the water separator 13,
It is returned to the solvent tank 11.

The intake valve 8 is configured to be opened and closed by an air cylinder 8a. Normally, the intake valve 8 is closed as shown in FIG. When the blower 5 is driven by opening the intake valve 8, external air is taken into the drum 1 and discharged from the exhaust valve 6. 6a is an air cylinder for opening and closing the exhaust valve 6.

By opening the valves 24 and 27, the drying heater 9 introduces steam of about 100 to 120 ° C. from the steam source S, and heats the air flowing through the circulation path 3. The cooling water source (chiller) W and the steam source (boiler) S are usually installed outside the dry cleaner.

The liquid supply port of the solvent tank 11 and the liquid discharge port of the button trap 10 are connected to the suction port side of the pump P via a liquid supply valve 21 and a liquid discharge valve 22, respectively. Also,
The discharge port side of the pump P is connected to the heat exchanger 12 via the filter F or a bypass 120 of the filter F. That is, the filter F and the bypass 120 that short-circuits the inlet and the outlet of the filter are interposed between the discharge port side of the pump P and the drum.
Switching valves (open / close valves) 122 and 121 at each inlet of
The flow is switched by opening and closing these switching valves.

The heat exchanger 12 is provided with a pipe 12a through which steam or cooling water is selectively passed in a solvent flow passage. The solvent outlet of the heat exchanger 12 is connected to a three-way switching valve 23. Is selectively connected to the solvent tank 11 or the drum 1. Of course, instead of the three-way switching valve 23, an on-off valve may be connected to each of the flow paths on the solvent tank 11 side and the drum 1 side.

In the heat exchanger 12, the valves 24, 25,
By opening the valve 28 and closing the valves 26 and 29, steam flows into the line 12a, and the valves 25 and 28
Is closed and the valves 26 and 29 are opened to allow the cooling water to flow through the pipe 12a, so that heating and cooling of the solvent can be selectively performed.

SE ₂ is a temperature sensor provided at the solvent inlet of the heat exchanger 12 and composed of a thermistor, and detects the temperature of the solvent. SE ₃ is a superheat sensor configured thermostatically to detect overheating of the solvent provided the heat exchanger 12.

SW is a pressure switch provided on the discharge port side of the pump P for detecting the flow rate of the solvent. When supplying the solvent to the drum 1, the solvent outlet of the heat exchanger 12 is connected to the three-way switching valve 2.
3 connects to the drum 1 and opens the valve 21 to drive the pump P.

When the solvent is discharged from the drum 1, the solvent outlet of the heat exchanger 12 is connected to the solvent tank 11 by a three-way switching valve 23, the valves 22 and 122 are opened, and the valves 21 and 121 are opened. Close and drive the pump P.
Thus, the solvent discharged from the drum 1 is stored in the solvent tank 11 after being purified by the button trap 10 and the filter F.

When the solvent is not supplied to the drum 1, the solvent outlet of the heat exchanger 12 is connected to the solvent tank 11 by the three-way switching valve 23, the valve 22 and the switching valve 121 are closed, and the valve 21 and the switching valve 122 Is opened and the pump P is driven, the solvent circulates between the solvent tank 11, the filter F and the heat exchanger 12, thereby purifying the solvent and controlling the temperature.

FIG. 3 is a cross-sectional view of a main part showing an arrangement relationship between the drum 1, the outer tank body 2, and the circulation path 3. The rotating shaft 107 of the drum 1 is rotated by a bearing 108 provided on the outer tank body 2. It is supported so as to be capable of being connected to an inverter control (variable speed) motor M via a large pulley 109, a small pulley 110 and a pulley belt 111.

When the door 101 is closed, one end (outlet) of the circulation path 3 is connected to the clothes input port of the drum 1, and the other end (inlet) is connected to the peripheral wall of the outer tank body 2. Therefore, when the motor M is driven and the drum 1 rotates, the drum 1 acts like a centrifugal fan (for example, a sirocco fan), and even if the blower 5 is stopped, the dry air near the peripheral wall of the drum is centrifugally forced. In the circulation path 3, whereby the drying air is blown by the negative pressure generated near the center axis of the drum as shown in FIG.
And the dry air is circulated as a whole. Reference numeral 106 denotes a rubber packing for sealing the door 101.

FIG. 4 is a block diagram of a control system. Reference numeral 31 denotes a control unit, that is, a microcomputer, and the microcomputer 31 includes a CPU, a ROM, and a RAM.

The microcomputer 31 includes a keyboard 34 and a display panel 3 via input / output ports 32 and 33.
5, the drum drive motor M, the pump P, a blower 5, the intake valve 8, the valve 21 to 29 switching valves 121 and 122, liquid level sensor SE _1, SE _7, the temperature sensor SE _2, superheat sensor SE _3, temperature Sensors SE _{4 to} SE ₆ and pressure switch S
W is connected to and controls the driving of these components, and the detection values are taken from these components.

FIG. 5 is a detailed view of the keyboard 34. The keyboard 34 operates a program key 41, and when a program number is designated by a numeric keypad 44, when a program number is designated, a plurality of operation programs stored in the microcomputer 31 are selected. Is called, and the setting data of each step in the program is displayed on the display panel 35.

In this state, when each step of the operation program is sequentially specified by operating the call key 43, a new operation can be performed in each of the specified steps, and a new operation program can be registered. Reference numeral 42 denotes a start / stop key for starting / stopping the operation of the dry cleaner.

On the display panel 35, the solvent temperature in the cleaning process, the temperature of the cooler 7 in the drying process, the cool down time,
Each timing of the drum inversion cycle, etc., the method of circulating the solvent, the method of draining the liquid, the method of supplying the drum at high, medium, and low rotational speeds, and the details of each stroke setting at the time of automatic or manual operation correspond to the LED. It is displayed by lighting or the like.

Next, the entire stroke of the dry cleaner having such a configuration will be schematically described. As shown in FIG. 6, in the preparatory operation step (step S100), when the power switch 4 is turned on, steam is supplied to the drying heater 9 from the steam source S, and the cooling water source W is supplied to the cooler 7 from the cooling water source W. Is supplied, and the blower 5 is driven, and the operating state of the drying heater 9 and the cooler 7 is detected by the temperature sensor S.
E ₆ , judgment is made based on the detected temperature of SE ₅ . Then, the display panel 35 displays whether the drying heater 9 and the cooler 7 are operating normally (operable) or not operating (operable).

When the operation is possible, the solvent is supplied to the drum 1 and the drum 1 is intermittently driven at a low speed (30 to 50 rpm) in the washing step (step S200).
To perform forward and reverse rotation (reversal) to perform tap washing for a predetermined washing time. In this cleaning step, the temperature in the drum is adjusted to an appropriate value before the cleaning liquid (solvent) is supplied to the drum 1.

When the washing step is completed, the solvent is discharged from the drum 1 in the liquid removing step (step S300).
After that, the drum 1 is further accelerated (600 to 700 rpm).
Then, the drum 1 is stopped and the draining process is terminated when a predetermined draining time has elapsed. In the liquid removal process, the drying heater 9 is operated while the drum 1 is rotating at a high speed, and warm air is supplied to the drum 1 by using low-speed circulating air generated by the high-speed rotation of the drum 1 to preheat the drum 1. I am trying to do it.

After the completion of the draining process, a self-sufficient performance improvement step (S600) of the pump is performed for a predetermined time (for example, 10 to 2).
0 second), the pump P is stopped, the switching valve 121 is opened, the switching valve 122 is closed, and the solvent in the flow path is allowed to fall naturally into the pump P using the head, and the self-sufficiency of the pump P is reduced. We plan up.

After the end of the pump self-sufficient performance improvement step, in the drying step (S400), the drum 1 is intermittently rotated forward and backward at a low speed, and the blower 5, the cooler 7 and the drying heater 9 are driven to dry air. Supply to drum 1.
After a lapse of a predetermined time, the operation of the drying heater 9 is stopped, cool air is supplied to the drum 1 (cool down), and the process proceeds to the next deodorization step (S500). In the course of this drying cycle, the locally overheat the solvent, an operation check of the superheat sensor (thermostat) SE _3.

In the deodorizing step, the intake valve 8 is opened, the external air is supplied to the inverting drum 1, and after a predetermined time, the intake valve 8 is closed, the rotation of the drum 1 is stopped, and the deodorizing step is completed. This completes the entire operation of the dry cleaner.

Next, detailed operations in the main steps of the above steps will be described with reference to flowcharts. (1) Preparation Operation Step FIG. 7 is a flowchart showing the preparation operation step. FIG.
When the power switch PS of the main body 100 is turned on, the blower 5 is operated, the intake valve 8 is closed, the steam inlet valve 24 and the steam outlet valve 27 are opened, and steam flows from the steam source S to the drying heater 9. Then, the preparation operation is started (steps S101 to S104). As for the cooler 7, if the cooling water source W is operating normally, the cooling water always circulates through the cooling water pipe, and the cooling water is supplied to the cooler 7.

Then, at the same time as starting the preparatory operation,
Step S105), temperature sensor SE ₆And temperature sensors
SE_FiveStarts the temperature measurement. Temperature sensor SE₆Is 70 ° C
If the following is detected continuously for 10 seconds (step S106),
Since it can be determined that the steam source S is operating normally,
As the drying heater is ready, close the valves 24 and 27 and close
The operation status check of the team source S is completed (step
S107 to S109). In addition, the temperature sensor SE_FiveIs 12
When the temperature below ℃ is detected continuously for 2 minutes, the cooling water source W
Since it can be determined that it is operating, cooler preparation is OK.
(Steps S110, 111).

When both of the above two conditions have been satisfied, the blower 5 is stopped, the preparatory operation is completed, the operation is put into a standby state, and the contents are displayed on the display panel 35.
(Steps S112 to S114). However, if either one of the above two conditions cannot be cleared, the preparatory operation is performed until 25 minutes elapse after the power is turned on. If the condition cannot be cleared even after 25 minutes have elapsed, it is determined that the steam source S or the cooling water source W is not operating normally, and the preparatory operation is terminated. The display prompts the user to check the operation state of the steam source or the cooling water source W (steps S114 to S118).

As described above, in the dry cleaner, the normal operation is started after confirming that the operation of the steam source S and the chilled water source W is normal in the preparatory operation, so that the steam source S or the chilled water source W is started. It is possible to prevent an operation interruption accident or a solvent ignition / explosion accident due to a malfunction of the device.

(2) Cleaning Step FIG. 8 is a flowchart showing the cleaning step. In FIG. 8, when a start / stop key 42 (FIG. 5) is pressed, a temperature sensor SE for detecting the temperature in the drum 1 is detected.
₄ starts temperature measurement (step S201). When the temperature sensor SE ₄ detects more than 50 ° C. (Step S202), actuates the blower 5, the drum 1 and the outer tank body 2 is cooled (step S203), the temperature sensor SE
_When the detected temperature in Step ₄ becomes lower than 40 ° C., the blower 5 is stopped (Steps S204 and S205).

Next, the drum 1 is intermittently rotated forward and backward at a low speed (reversed), and at the same time, the pump P from the tank 11, the bypass 120 (opening of the switching valve 121, 122 closed), the heat exchanger 12, and the three-way switching The solvent is supplied to the drum 1 through the valve 23, and when the solvent in the drum 1 reaches a predetermined liquid level, the tank 1
1 to stop supplying liquid to the drum 1 (step S206)
To S209). Next, the solvent (cleaning agent) of the drum 1 is supplied to the button trap 10, the pump P, the filter F (the switching valve 121).
(Closed, opened 122), circulate through the heat exchanger 12, the three-way switching valve 23, and the drum 1 (step S210). If the solvent temperature is 27 ° C. or higher, the cooler 7 is activated.
If the temperature of the cleaning liquid drops below 2 ° C., the operation of the cooler 7 is stopped (steps S 210 to S 213), so that
Temperature control is performed to keep the temperature at 7 ° C. or less.

Next, the drum 1 in step S206
7 minutes have passed since the start of the reversal of (Step S
214), the solvent circulation operation is stopped, and the reversing operation of the drum 1 is stopped to end the cleaning process (step S2).
15, S216). Also, in step S202,
The temperature detected by the temperature sensor SE ₄ (drum outlet temperature) is 50
If the temperature is lower than 30 ° C. and lower than 30 ° C. (step S217),
The routine proceeds to step S206.

[0053] Further, in step S202, S217, if the detected temperature is lower than 30 ° C. the temperature sensor SE _4, to start the inversion operation to the drum 1, supplying the solvent from the tank 11 to the drum 1, the drum 1 of When the solvent reaches the predetermined liquid level, the supply of the liquid from the tank 11 to the drum 1 is stopped (steps S218 to S220).

Next, the cleaning agent in the drum 1 is circulated to the button trap 10, the pump P, the filter F, the heat exchanger 12, the three-way switching valve 23, and the drum 1 (step S221), and the temperature of the cleaning agent is reduced. If the temperature is lower than 23 ° C., the drying heater 9 is operated, and if the temperature exceeds 23 ° C., the operation of the drying heater 9 is stopped (step S222).
To S224), temperature control for maintaining the temperature of the cleaning liquid at 23 ° C. or lower is performed. Then, when seven minutes have elapsed since the start of the reversal of the drum 1 in step S218, the cleaning process ends (steps S215 and S216).

According to the cleaning process of this embodiment, at the start of the cleaning process, the temperature inside the drum is set to an appropriate temperature range in advance, so that the danger of ignition or explosion of the solvent can be avoided and the cleaning process can be performed efficiently. It can be performed.

Further, since the solvent temperature can be estimated from the value of the temperature in the drum before the start of the cleaning step, the heating or cooling means necessary for controlling the solvent temperature in accordance with the temperature in the drum, that is, The solvent drying heater or the solvent cooler can be selected in advance, and the temperature control of the solvent during the cleaning process can be easily controlled.

(3) Liquid Removal Step FIG. 9 is a flowchart showing the liquid removal step . When the cleaning process is completed, the drain valve 22 is opened and the pump P and the filter F (the switching valve 121) are opened from the drum 1 as shown in FIG.
(Close, 122 open) Solvent is discharged to the solvent tank 11 via the heat exchanger 12 and the three-way switching valve 23 (step S30).
1) Then, the drum 1 is further rotated forward at a high speed (600 to 700 rpm) by operating the drum motor M (step S302), and the intake valve 8 and the exhaust valve 6 are closed (steps S303, 304).

Next, the steam inlet valve 24 is opened to supply steam to the drying heater 9 (step S305). If the temperature of the drum 1 is lower than 40 ° C. (step S306), after the lapse of the liquid removal time (step S307), Move to the self-sufficiency performance improvement process of the pump. On the other hand, if the temperature of the drum 1 is equal to or higher than 40 ° C., the steam inlet valve 24 is closed immediately (step S3).
08) If the temperature falls below 38 ° C. (step S 309), the steam inlet valve 24 is opened again and the same steps are repeated. The process is completed, and the process proceeds to a process for improving the self-sufficiency of the next pump.

(4) Self-Supply Performance Upstroke of Pump FIG. 10 is a flowchart showing the self-supply performance upstroke of the pump P. In the dewatering process, the solvent of the drum 1
As described above, since the solvent is discharged to the solvent tank 11 via the pump P, the filter F, the heat exchanger 12, and the three-way switching valve 23, the amount of the solvent passing through the pump P is gradually reduced. At first, there is a possibility that the amount of the solvent in the casing of the pump P also decreases and the self-sufficiency decreases. The self-sufficiency performance improvement step of the pump is performed to prevent the self-sufficiency performance of the pump from decreasing as described above before shifting to the next drying step (including the solvent purification step).

When the draining process is completed, the pump P is stopped for a certain period of time (for example, 10 seconds to 20 seconds, in this case, 15 seconds), and the switching valve 121 is opened and the switching valve 122 is closed to set the discharge port of the pump P The solvent in the side flow path is naturally dropped into the pump P by utilizing the head, and the amount of the solvent enough to maintain the self-sufficiency of the pump is secured (step S601,
602). (5) Drying Process FIG. 10 is a flowchart showing the drying process.

When the self-sufficiency performance improvement step of the pump is completed, the pump P is operated (step S401) to remove the solvent from the solvent tank 11 as shown in FIG.
(The switching valve 121 is closed and the switching valve 122 is opened), the heat is circulated to the heat exchanger 12, the three-way switching valve 23, and the solvent tank 11, and temperature control for maintaining the temperature of the solvent at about 25 ° C. is started (step). S402).

At the same time, the blower 5 and the drying heater 9 are operated to supply warm air to the drum 1 (step S40).
3, S404) Within 3 minutes, the drum inlet temperature, that is,
If the temperature detected by the temperature sensor SE ₆ does not rise above 50 ° C. stops the operation determines that the malfunction of the steam source S (step S405 to S407). If the drum inlet temperature rises to 50 ° C. or higher within three minutes, the operation of the steam source S is determined to be normal, and low-temperature drying is performed for a predetermined low-temperature drying time (steps S408 and S409).

Here, the low-temperature drying means that the temperature inside the drum 1 is reduced to a safe temperature (0.6 vol%) while the drum is inverted, until the concentration of the solvent vaporized in the drum 1 falls below the safe value (0.6 vol%). Drying is performed by supplying hot air to the drum 1 while controlling the temperature at the drum entrance to 50 ° C. in order to maintain the temperature at 40 ° C. or lower.

Next, high-temperature drying is performed (S410). The high-temperature drying means that when the concentration of the solvent vaporized in the drum 1 falls below a safe value, the drum 1 is turned over and hot air of a higher temperature (about 70 to 100 ° C.) is blown for a predetermined high-temperature drying time. It is to supply the toner to the drum 1 and perform drying efficiently.

When a predetermined high-temperature drying time has elapsed, the high-temperature drying ends (steps S413 and S41).
4), the operation of the drying heater 9 is stopped, and cool air from the cooler 7 is supplied to the drum 1 for a predetermined cool down time to cool the inside of the drum 1 and end the drying process (step S4).
15).

[0066]

By stopping the pump and opening the switching valve provided at the inlet of the liquid supply path for a certain period of time after the end of the liquid removal process, the solvent in the opened flow path is naturally pumped by the head. To thereby increase the original self-sufficiency performance of the self-contained pump.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating the configuration of an embodiment.

FIG. 3 is a sectional view of a main part of the embodiment.

FIG. 4 is a block diagram of a control system of the embodiment.

FIG. 5 is a front view showing the keyboard of the embodiment.

FIG. 6 is a schematic flowchart showing a process of the embodiment.

FIG. 7 is a flowchart of a preparation operation process of the embodiment.

FIG. 8 is a flowchart of a cleaning process according to the embodiment.

FIG. 9 is a flowchart of a liquid removal process according to the embodiment.

FIG. 10 is a flowchart of a self-sufficiency performance increasing step of the pump of the embodiment.

FIG. 11 is a flowchart of a drying process according to the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Drum 2 Outer tank main body 3 Circulation path 4 Drainage line 5 Blower 6 Exhaust valve 7 Cooler 8 Intake valve 9 Drying heater 11 Solvent tank 12 Heat exchanger 13 Water separator 21-29 Valve 120 Bypass path 121-122 Switching valve SE ₁ Liquid level sensor SE ₂ Temperature sensor SE ₃ Overheat temperature sensor SE ₄ Temperature sensor SE ₅ Temperature sensor SE ₆ Temperature sensor SE ₇ Liquid level sensor SW Pressure switch S Steam source W Cooling water source F Filter

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D06F 43/00-43/08

Claims (3)

(57) [Claims] 1. A drum for receiving a supply of a cleaning liquid and containing clothes, a tank for the cleaning liquid, a pump, a liquid supply path,
An opening and closing valve provided in the liquid supply passage, a cleaning means for the pump cleaning liquid from the tank and supplied to the drum via the liquid supply path, by rotating the whereafter the drum to wash the clothes, the dry with a drainer for the drum is rotated at a high speed cleaning fluid was centrifuged dewatered, and draining cleaning solution to the tank through the pump, the washing, and a driving means for sequentially driving control drainer in the cleaner, the pump is a self-contained pump, and at least a portion of the downstream side the liquid supply path from the on-off valve is positioned above said pump, said operating means a predetermined time after the end of draining stroke , dry cleaner, characterized in that the Pont <br/> stopping the flop, and executes the pump self-sufficiency performance up stroke for opening the closing valve. 2. A garment for receiving a supply of a washing liquid and containing clothing.
Drum, washing liquid tank, pump, and the pump
And a filter interposed between the filter and the drum.
Liquid supply having a bypass path for short-circuiting the inlet and outlet of the filter
Channel and each inlet of the filter and the bypass channel.
A switching valve provided respectively, and the cleaning liquid is supplied from the tank to the
A pump and the drain through the bypass of the liquid supply passage.
The drum, and then rotate the drum to wash the clothes.
Cleaning means for cleaning, and cleaning liquid by rotating the drum at a high speed
By centrifuging and washing the washing liquid through the pump.
Liquid discharging means for draining to the tank, and the washing and liquid removing means in sequence.
Dry cleaner with operating means for operation control
The pump is a self-contained pump and
The driving means is disposed at a lower level, and the driving means is provided with the pump for a certain period of time after the end of the liquid removal process.
Stop at least one of the switching valves.
The pump self-sufficiency performance improvement process
Dry cleaner characterized by the following . 3. The pump according to claim 1, wherein the operating means includes a pump self-sufficiency performance indicator.
When the switching valve on the filter side is closed during the
3. The switching valve on the side of the bypass road is both opened.
Dry cleaner as described.