JPH077914Y2 - Heater scale detector for clothes press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a boiler management technology for detecting the maintenance time of a heater in a boiler device, and more particularly to a heater scale detection device for a clothing press machine.

[Conventional technology]

Various boilers are included in the water supplied to the boiler.
Various contained ionic substances such as Mg ²⁺ , Na ⁺ , Si ^4+, etc. form carbonate oxides on the surface of the heater due to the heat of the heater and deposit, and a large amount of scale accumulates and adheres. As a result, the heat transfer efficiency is reduced, so that the heat of the heater is less likely to be released to the outside, the surface temperature of the heater is abnormally heated and the structure of the heater surface is deteriorated, or the insulation is retreated. It not only shortens the service life of the boiler, but also has a serious problem such as damage to the boiler.

For this reason, boilers are obliged to perform regular inspections and maintenance, and they are inspected and maintained at regular intervals.However, it is said that favorable maintenance is performed due to variable factors such as operating time conditions and water usage conditions. I can't say.

For this reason, conventionally, a method has been adopted in which a boiler is provided with an integration timer and the usage time of the boiler is integrated to notify the maintenance time. A boiler maintenance time notification device based on the total usage time is known.

[Problems to be solved by the device]

However, in the method of notifying the maintenance time of the boiler heater by integrating the usage time of the boiler with an integration timer, (1) whether the water used for the boiler is water that has passed through the water softener.

(2) Whether the water softener you are using is working properly.

(3) Mg ²⁺ , Na ⁺ , Si ⁴⁺ contained in the water when the water softener is not used (generally the most used)
Variations in various ion concentrations such as

Since there are various variable factors such as the above, it is impossible to know the preferable maintenance time even if the total usage time is simply calculated by integration.

The present invention has been made in view of the above problems, and always detects a preferable maintenance time even when the usage conditions such as water used and time are different, and in particular, it is a heater for a clothing press equipped with a small boiler. An object of the present invention is to provide a scale detection device.

[Means for Solving the Problems]

That is, the heater scale detection device of the clothing press machine according to the present invention is a small boiler having a function of supplying steam to the steam iron provided in the clothing press machine, triggered by an ON signal of the heater, and after a preset time t. When the signal timing from the pressure switch is delayed from the signal timing t from the timer circuit that outputs the signal, the pressure switch that communicates with the boiler can body and that outputs the signal at a preset pressure, and the signal timing t from the timer circuit. The gist of the invention is to notify a heater abnormality such as scale adhesion to a heater, which is composed of a logic circuit that outputs an error signal and a notification means that is driven by an error signal output from the logic circuit.

In addition, a signal maintaining circuit for sustaining the output signal of the logic circuit is provided in the subsequent stage of the logic circuit, and a set time input circuit for automatically changing and inputting the set time t of the timer circuit by detecting the temperature of the used water. Is preferably added.

[Action]

The timer circuit is set to output a pulse width of a preset time (time until the normal boiler pressure reaches ² kg / cm ² , for example) t triggered by an ON signal of the heater. The pressure switch has a function to turn off automatically at ² kg / cm ² , and if the pressure switch signal rises within the set time t, the signal of the logic circuit outputs “normal” and if it is delayed from the set time t. Outputs "abnormal".

If a large amount of scale adheres to and accumulates on the surface of the heater, the heat transfer efficiency decreases and the rise in water temperature slows down, so the rise in boiler pressure is also delayed. Therefore, the rising signal of the pressure switch is delayed from the preset time t of the timer circuit, which becomes the "abnormal" output of the logic circuit.

The "abnormal" output of the logic circuit drives a notification means such as a warning lamp or an alarm device to notify the heater maintenance time. At this time, since the signal sustaining circuit for sustaining the output signal of the logic circuit is formed in the subsequent stage of the logic circuit,
The notification means keeps the warning until the maintenance is completed. Further, since the set time input circuit detects the temperature of the water used and automatically changes the set time of the timer circuit, a proper "abnormal" output can always be obtained.

〔Example〕

An embodiment of a heater scale detection device for a clothes press according to the present invention will be described below with reference to the drawings.

1 to 3 show a clothes press equipped with a small boiler equipped with a heater scale detection device of the present invention. Reference numeral 1 is a flat board 3 under a vacuum board 2a, a power supply box 2b,
A clothing press machine body provided with a horse flat switching duct 2c, a power switch 2d, and the like. Above the flat stand 3 are a pair of horse pedestals 4,4.
Is configured to displace the position of the platform 4 between the use position and the standby position via the turning support arm 5 and the support shaft 6. The exhaust duct 7 projecting upward from the back surface of the vacuum board 2a has an operation panel 8 and a control box 9 fixed at a position where it can be easily operated and visually recognized. It is provided. The small boiler device 11 is installed on one side of the vacuum board 2a, and is composed of a steam iron 12 used in a clothes press and a steam port 15 of the boiler device 11 connected via an iron hose 13. The boiler device 11 secretly configures an upper canister 17 and a lower water supply part 18 by an integral can body communicating with the communicating parts 19 and 20, and inserts the heater 21 into one communicating part 19 and the other. A boiler (16) in which a pair of water level detection sensors (22) for detecting the high and low limits are secretly inserted is built in the communication part (20). The water supply section 18 of the boiler 16 is in communication with a water receiving tank 24 via a water supply pump 23, and the pair of water level sensors
The water level in the boiler 16 detected by 22 is controlled and driven by a control circuit (not shown) so as to be maintained within a certain range, and the water receiving tank 24 is new by the amount evaporated from the inverted cartridge water tank 25. Water will be supplied.

Further, the steam port 15 having an outlet structure for connecting to the steam iron 12 is provided with one end of the steam reservoir 17 and a copper pipe 26.
Further, a pressure meter 27 provided at a visible position of the boiler device 11 casing is connected to the steam reservoir 17 via a copper pipe 28. The copper pipe 28 connected to the pressure meter 27 is O at a preset pressure (eg 2 kg / cm ² ) P
It is branched and connected to a pressure switch 29 having a function of N or OFF, and the output of the pressure switch 29 is input to a heater scale detection device 30 described later.

Reference numeral 31 is a safety valve that opens when the vapor reservoir 17 is abnormally pressurized, and 32 is a negative pressure prevention valve that opens when the vapor reservoir 17 has a negative pressure.

The clothes press machine having the above construction operates as shown in FIG. 4 to constantly and stably supply the iron 12 to the above.

Next, a first embodiment of the heater scale detection device 30 of the present invention will be described with reference to FIGS.

Reference numeral 33 is a timer circuit which is triggered by an ON signal of the heater 21 and outputs a pulse signal F1 of a time t preset by an input from a set time input circuit 39 described later. Reference numeral 29 is the pressure switch for switching the output signal F2 from ON to OFF when the detected pressure P is 2 kg / cm ² . Reference numeral 34 is a logic circuit to which both outputs F1 and F2 of the timer circuit and the pressure switch 29 are input. In the embodiment, F1 is an AND circuit via the NOT circuit 36.
The circuit input to 35 is configured to output a signal F3 which becomes "H" only when F1 is "H" and F2 is "L". Reference numeral 37 indicates an output F3 from the logic circuit 34,
It is a notification means for driving the output signal “H” of 34 through the signal maintaining circuit 38, and has a structure appealing to the visual or auditory sense such as a warning light such as an LED or an alarm device such as a piezoelectric element buzzer.

Further, the time setting circuit 39 is configured to automatically change and input the set time t of the timer circuit 33 via the arithmetic circuit 41 by the temperature input from the water temperature sensor 40 that detects the temperature of the used water.

Therefore, when the set time t of the timer circuit is determined by the time setting circuit 39, as shown in FIG. 6, the rising time from when the heater 21 is turned on until the pressure P of the boiler 16 becomes ² kg / cm ² and the set time. By monitoring the time t, the adhered state of the scale to the heater 21 can be detected, and the notifying means 37 is driven when an abnormality occurs.

Further, FIG. 7 shows another embodiment of the heater scale detecting device 30 in which the logic circuit 34 is handled in an analog manner. When the comparison circuit 42 is used for the logic circuit 34 and the output signal F1 (voltage value in this case) from the timer circuit becomes “0”, the signal F2 (voltage value in this case) from the pressure switch 29 becomes “0”. Positive "
“Error output” from the comparison circuit 42 when
Is output as voltage F3, and the switch circuit 43 and the sustain circuit 38
The notification means 37 is driven via. The sustain circuit 38 has a reset function for initializing.

The heater scale detection device 30 of the present invention as described above
The present invention is not limited to the disclosed embodiment, and it goes without saying that various logic circuits can be made by comparing the preset time t with the time required for the boiler to reach the preset pressure.

[Effect of device]

As described above, the heater scale detection device for the clothes press according to the present invention is capable of detecting the delay time in the rise of pressure when a large amount of scale or the like adheres to the heater surface in the mini boiler. Since it has a structure for notifying the maintenance time of the heater, the structure of the device is simple and it can be provided at a low price. Further, the rise of the boiler pressure has a characteristic peculiar to each boiler, and since there is almost no variation in the characteristic, maintenance time management can be performed with high accuracy. Furthermore, since the abnormality is detected by the rise time of the boiler pressure, it goes without saying that it is possible to detect even the heater burnout, and it has various excellent features. The provided clothing press machine has an extremely large practical effect after the present invention, such as maintaining the heat efficiency of the heater in the optimum state and stabilizing the steam supply ability to the iron.

[Brief description of drawings]

FIG. 1 is a perspective view of a clothes press equipped with a small boiler with a heater scale detection device according to the present invention, FIG. 2 is a front view showing the internal mechanism of the small boiler, and FIG. 3 is a side view showing the internal mechanism. FIG. 4 is a flow chart showing the operation of the clothing press machine, FIG. 5 is a block diagram showing an embodiment of the heater scale detection device, and FIG. 6 shows the internal pressure of the boiler and the operation timing of the heater scale detection device. A timing chart, FIG. 7 is a block diagram showing another embodiment of the heater scale detection device. 1 ... Clothing press machine body 9 ... Control box 11 ... Small boiler device, 12 ... Steam iron 15 ... Steam port, 16 ... Boiler 21 ... Heater, 22 ... Water level detection sensor 23 ... Water supply pump 25 ... Cartridge water tank 27 ... Pressure meter , 29 ... Pressure switch 30 ... Heater scale detection device 33 ... Timer circuit, 34 ... Logic circuit 37 ... Notification means, 38 ... Signal maintenance circuit 39 ... Set time input circuit, 40 ... Water temperature sensor 41 ... Arithmetic circuit, 43 ... Switch circuit

Claims (3)

[Scope of utility model registration request] 1. A small boiler having a function of supplying steam to a steam iron provided in a clothes press, a timer circuit which is triggered by an ON signal of a heater and outputs a signal after a preset time t, and a boiler circuit. A pressure switch connected to the can body for outputting a signal at a preset pressure; a logic circuit for outputting an error signal when the signal timing from the pressure switch is delayed from the signal timing t from the timer circuit; A heater scale detection device for a clothing press, comprising: a notification means that is driven by an error signal output from a logic circuit to notify a heater abnormality such as scale adhesion to the heater. 2. A heater scale detecting device for a clothing press machine according to claim 1, further comprising a signal maintaining circuit which is provided at a subsequent stage of the logic circuit and which maintains an error output signal of the logic circuit. 3. A heater scale for a clothing press according to claim 1 or 2, further comprising a set time automatic input circuit for detecting a temperature of water used and changing and inputting a set time t of the timer circuit. Detection device.