JPH01317498A - Cloth drying machine - Google Patents

Abstract

PURPOSE:To automatically set the operating time of low temperature drying to a suitable range by discriminating that the contents of a number counter are coincident with a setting number, executing low temperature drying operation, moving to high temperature drying operation according to a number discriminating part output during this operation and executing the operation. CONSTITUTION:After a time to correspond to the conditions passes, a supplying valve 15 repeats opening and closing and a number counter 30 is successively added. The interval of this valve opening and closing is correspondent to the conditions. The count number is set in advance, by a number almost enough to execute the low temperature dehydrating by experimentation, etc., and a number discriminating part 35 observes that the contents of the number counter 30 are coincident with the setting counter number. When there is the output of the number discriminating part, a dry control part 33 stops the low temperature drying operation regardless of the contents of a timer counter 31 and moves to high temperature drying operation and this operation is executed. In the high temperature drying operation, inlet and exhausting ports 19 and 21 and a supplying valve 15 are opened and held and an exhausting valve 16 is opening or closing-controlled according to whether the detecting temperature of a drying chamber entrance 7 goes to be an entrance control temperature (higher) or not. This operation is executed until a time counter 32 is counted up.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is a method for safely drying clothes washed with petroleum-based solvents at low temperatures, recovering the solvent in the clothes, and then finishing them at high temperatures. Concerning a clothes dryer that dries clothes well.

(b) Conventional technology When drying clothes coated with petroleum-based solvents, the flash point temperature of the solvent is as low as approximately 42°C, so it is necessary to monitor the solvent gas concentration and the temperature of the drying air. There is. For example, in the clothes dryer VC disclosed in Japanese Utility Model Application Publication No. 59-190192, when the gas concentration increases, the circulating drying air is exhausted and outside air is sucked in. Even in each type of dryer, air intake and exhaust air is adjusted according to temperature rise, time elapse, etc.

However, since this releases solvent gas, it is almost impossible to recover it, and even though petroleum-based solvents are cheap, they are wasteful and there are concerns about air pollution.

Therefore, the temperature of the drying air is a low temperature that does not pose a risk of ignition.
For example, it has been proposed to carry out the drying operation at a temperature of 40°C or lower and to recover the solvent (Utility Model Publication No. 62-1961).
(Refer to 87ji+ publication).

(c) Problems to be Solved by the Invention However, the low-temperature drying operation time tends to be long, and it is difficult to set the operating time because it has to be changed depending on various conditions such as the size of the clothes.

The present invention makes it possible to self-help set the operating time for low-temperature drying within an appropriate range.

B) Means for Solving the Problems The solution according to the present invention includes a drying chamber for accommodating clothes washed with a petroleum solvent, a fan for supplying drying to this drying chamber, and a heater for heating the drying temperature. , a temperature detection element that detects the humidity of the drying air after drying, a recovery tank that collects the core material from the drying air after drying, and a determination when the detected temperature reaches the control temperature for low-temperature drying. A temperature discriminating unit that performs a drying operation, a number counter that counts each time the output of this discriminating unit is output, and a number discriminating unit that determines whether the contents of this number counter match the set number of times, and executes low temperature drying operation. It is fully equipped with a drying control unit that shifts to and executes high-temperature drying operation according to the output of the printing unit the number of times during operation.

(E) Function During low-temperature drying operation, the degreaser recovery work is carried out safely at low temperatures, but the temperature of the drying air at the exit of the drying chamber is controlled to be low. Furthermore, it exhibits characteristics depending on conditions such as clothing. For a certain control quality, if the amount of clothing is large, the liquid removal rate is low, or the outside air temperature is low, the temperature and pressure will not be reached easily. That is, the heating is stopped in order to maintain the low temperature before the temperature after drying reaches the control temperature. This allows a certain control temperature to be maintained while maintaining a low temperature.//2. This shows that the time it takes to reach the temperature after drying changes on its own depending on various conditions.

After this, when the greenhouse after drying descends and returns several times, the low-temperature drying operations, which differ in the conditions before operation, will cause the conditions to become unreliable at this stage. Therefore, here, the low temperature drying operation is shifted to the high temperature drying operation.

(f) To explain based on the embodiment drawings, the body 1 after drying is divided into two upper and lower stages, the upper stage constitutes a drying chamber 6 having a rotating drum 2, and the lower stage has a U-shaped passage. A recovery tank 4 is configured. There is a door (not shown) at the top of the front of the aircraft 1.
There is a clothes entrance/exit to the drying room 6 which can be opened and closed by.

Also, on the top of aircraft 1, there is a ``Tai!''! It constitutes an operation room 5 in which operating bodies and control circuits for operating and controlling the dryer A are incorporated. An outlet 6 of the drying chamber 3 is connected to one end of the recovery tank 4, and an inlet lower end is connected to the other end of the tank.

A filter 8 and a cooler 9 are sequentially arranged on the outlet 6 side of the recovery tank 4, and the inner bottom of the recovery tank 4 is formed into a storage chamber 10 for the conversion agent. A fan 11 made of aluminum fins is disposed near the inner bottom on the lower entry side of the collection tank 4, and a heater 12 is provided near the lower entry. A cover 16 made of a punched plate is placed on the top of the storage chamber 10.

The cooler 9 and the heater 12 are of fin tube type, and the cooler 9 is supplied with cooling water through a front or automatic cold water valve 14, and the heater 12 is supplied with cooling water through a supply valve 15 and a discharge valve 1.
Steam is supplied via 6, respectively.

Near the outlet 6 of the drying chamber 6, there is an exhaust port 19 equipped with an exhaust A18 that is opened and closed by a torque motor M117.At a downstream position of the fan 11 of the recovery tank 4, there is a spring attached to the opening direction at all times. Inlet port 2 equipped with a cap (not shown) which is energized and operated to open by a torque motor M220.
1 is provided.

The exhaust port 19 and the intake port 21 are closed during low temperature drying operation.

A pressure adjustment port 22 is formed on the upper surface of the drying chamber 6 and communicates with the outside through the operation chamber 5t, and is normally closed by a spring-biased pressure adjustment port 26.

The solvent stored in the storage chamber 10 is delivered to a tank or the like by appropriate means.

An inlet temperature detection element 24 for detecting the inlet temperature of the drying air is disposed on the inlet lower side of the drying chamber 3, and an outlet temperature detection element 25 for detecting the outlet temperature is disposed near the outlet 6. .

The control unit @ in the operation room 5 is a CPU as shown in FIG.
A microcomputer (hereinafter referred to as microcomputer) consisting of , ROM, RAM, and Ilo is assembled with 26 t-center KL, and controls the entire drying operation by operating the tag and start key 27. For that purpose, microcontroller 2
6 is input from the start key 27, temperature detection element 24, 25, rotary drum 2, fan 11, cold water valve 14, supply valve 15, discharge valve 16, torque motor M1, as shown in Figure 1.
17, M220, display 28, and output to the display 29.

In addition, the microcomputer 26 has CPU% ROM, RAM% I
lo, and constitutes a frequency counter 60, a low temperature drying time counter 61, a high temperature drying time counter 62, a drying control section 66, a temperature discrimination section 64, and a frequency discrimination f[5.

As shown in FIG.
Clear the contents of , set the maximum operating time in the low-temperature drying time counter 61, and set the count, inlet control temperature (low), and outlet control temperature (low) for low-temperature drying.i9, microcomputer 26 sets the operating time in the high temperature drying time counter 32, and also sets the inlet control temperature (high) for high temperature drying.The inlet control temperature (low) and the outlet control temperature K
(low) relationship.

Then, the microcomputer 26 causes the drying control unit 66 to open the cold water valve 14, the supply valve 15, and the discharge valve 16, and causes the drum 2 and fan 11 to be milled.

At the same time, intake and exhaust ports 19 are driven by torque motors 17 and 20.
．． 21 is closed.

In this way, when the wet-dry method operation is first started, the supply valve 15 is operated until the detected temperature at the outlet B of the drying chamber 6 reaches the outlet control temperature during the longest period of low-temperature drying operation until the content of the number counter 61 reaches the set count. The exhaust valve 16 is opened and closed when the detected temperature of the inlet lower reaches the inlet control temperature (low), and the heater 12 performs low temperature control. Since the inlet control temperature (low) is lower, only the open/close I control of the discharge valve 16 is performed.

During this time, the supply valve 15 remains open for a long time because the discharge valve 16 opens and closes quickly, but this length corresponds to various conditions such as the amount of clothing, the liquid removal rate, and the outside temperature. When low temperature drying progresses and there is output to the inlet and outlet of the drying chamber 6, the supply valve 15 is closed and the number of times counter 6
It is added to 0 each time.

In this way, after the time corresponding to the % conditions has elapsed, the supply valve 1
5 repeats opening and closing, and the number of times counter 60 is sequentially incremented. This valve opening/closing interval also corresponds to the above conditions.

The preset count is the number of times that low-temperature drying is performed almost sufficiently, which is determined through experiments, etc.
5 sees that the contents of the number counter 60 match the set count. And the number of times is 1! ! When there is an lJ separate output, the drying control section 66 stops the low-temperature drying operation regardless of the contents of the time counter 61, and shifts to and executes the high-temperature drying operation.

In high temperature drying operation, suction, exhaust port 19.21, supply valve 15
Open and close the discharge valve 16 when the detected temperature of the drying chamber lower reaches the inlet control temperature (high) K! I'm going to do IJd.

This operation is executed until the time counter 52 counts up.

After the high temperature drying operation, the heater 12 is set to 0FFL to cool down.

(g) Effects on the sending side According to the present invention, low-temperature drying operation is executed automatically in response to various conditions related to clothing, so it is possible to eliminate wasted time and also ensure the @MIJ recovery rate. , it is possible to provide an extremely efficient clothes dryer.

[Brief explanation of the drawing]

Figure 141 is a sectional view of the clothes dryer according to the present invention, and Figure 2 is! The circuit diagram of lJ'aJ and FIG. 6 is a flowchart for explaining the operation. 6...Drying room, 4...Collection tank, 9...Cooler,
DESCRIPTION OF SYMBOLS 11...Fan, 12...Heater, 25...Outlet temperature detection element, 26...Microcomputer, 60...Number of ticks, 66...rj:, drying control # section, 64... Temperature discrimination section, 3rd sweet fall discrimination section. 11A person 3rd f#Den A-share Bounsha patent attorney Futsugu Nishino (1 other person) Figure 2

Claims (1)

[Claims] (1) A drying room that stores clothes washed with petroleum solvent, a fan that supplies drying air to this drying room, a heater that heats the drying air, and a sensor that detects the temperature of the drying air after drying. A temperature detection element, a recovery tank that condenses and recovers the solvent from the drying air after drying, a temperature discrimination section that discriminates when the detected temperature reaches the control temperature for low-temperature drying, and the degree of output of this discrimination section. A number counter that counts the number of times, a number determination unit that determines whether the contents of this number counter match the set number of times, a low temperature drying operation is executed, and a transition to high temperature drying operation is performed based on the output of the number determination unit during this operation. A clothes dryer comprising: