JPH0240952B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a sheet dryer, and more particularly, to a sheet dryer that dries wet sheet materials such as Japanese paper, leather, cloth, etc. by pasting them on a sheet heat dissipating surface.

(Background technology) Traditionally, dryers for drying Japanese paper, etc.
Generally, the structures shown in FIGS. 9 and 10 were used. That is, this dryer has a base 10
On the top, the outer surface is a heat dissipation surface 1 for drying the object to be dried 11.
A heat dissipation section 12 having a substantially A-shaped longitudinal section is provided, and the inside of this heat dissipation section 12 has a tank structure into which water W is injected, and a lower space section 12b.
A burner 13 using heavy oil as fuel was installed to heat the tank. In addition, 12c is a steam vent provided at the top of the heat radiating part 12 and communicates with the inside of the tank, and when the pressure inside the tank exceeds a predetermined value, the steam pressure is released to the outside through this steam vent 12c. It is.

Therefore, in use, water W is put into the tank, and the heat radiating part 12 is heated from the outside with the burner 13 to raise the temperature of the water W inside to a predetermined temperature to heat the heat radiating surface 12a, and then the burner 13 is heated. The object 1 to be dried is extinguished and attached to the heat radiation surface 12a.
1 is dried, the object to be dried 11 is peeled off, a new object to be dried 11 is attached, and the burner 13 is ignited again. This process is repeated.

However, in the dryer with the above configuration, (a) It is preferable that the temperature of the heat radiation surface 12a of this dryer is in the range of about 60 to 90°C in consideration of the material to be dried 11, but the burner 13 is ignited again. Until now, the temperature had dropped slightly, and in the past, the only way to raise the temperature by that amount was to rely on the operator's control.
Difficult to control temperature.

(b) It is difficult to control the fuel consumption of the burner 13, which uses heavy oil as fuel.

(c) In order to avoid the risk of fire, it is necessary to take safety measures for the fuel tank of the burner 13, and since the fuel is heavy oil, there are problems with safety and cleanliness due to the generation of odors.

(d) Since the water in the tank is heated, it takes time to heat a large volume of water and the temperature rise speed is slow.

There were other drawbacks.

(Object of the Invention) The present invention has been proposed in view of the above points, and its purpose is to integrate the heat radiating part and the heat source, and to use a heater or the like as the heating element constituting the heat source. It is an object of the present invention to provide a sheet dryer which is particularly suitable for drying materials to be dried such as sheet materials such as Japanese paper, leather, cloth, etc., and which can obtain materials to be dried with stable quality.

(Disclosure of the Invention) A first embodiment of the present invention will be described below with reference to the drawings of FIGS. 1 to 3.

Fig. 1 shows a heat dissipation section used for Japanese paper with a part cut out in red, and Fig. 2 is an overall perspective view of the same as above. A container 2 made of wood, and a pipe-shaped heating means 3 inserted through the bottom of the container 2.
and a working fluid consisting of a heat medium 4 such as water or chlorofluorocarbon, which is injected into the bottom of the container 2, and has a kind of flat heat pipe structure. In this embodiment, a sheathed heater H is used as a heating element constituting the heating means.

That is, as shown in FIG. 3 in detail, when a sheathed heater H is inserted into the center of the hollow pipe-shaped heating means 3 and the commercial power supply AC is applied to heat it, the heat medium 4 is vaporized and becomes steam, and this generated The steam moves upward at high speed as shown by the arrow, condenses and liquefies, and this condensed liquid moves downward by gravity etc. along the inner part of the heat radiation surface 2a of the heat radiation part 2 and reaches the heating means 3. Reflux and thus repeat the heat transport cycle.

Therefore, the planar outer surface of the container 2 is the heat radiation surface 2.
Since heat output can be taken out there as a, it is sufficient to attach a material to be dried 5 such as Japanese paper to the heat dissipation surface 2a and dry it. At this time, the temperature has a uniform temperature distribution on the heat radiation surface 2a. That is, when the temperature locally drops, more steam condenses in that area and acts to keep the temperature constant.

In addition, in order to control the temperature of the heat dissipation surface 2a, the temperature sensor TH that detects the heat dissipation surface temperature is connected to the heat dissipation surface 2a.
It can be configured to be provided, for example, approximately in the center of the surface opposite to the radiating surface 2a, and to control the temperature of the heat dissipating surface 2a via the lead wire 6.

The moisture-containing material 5 to be dried is attached to the heat radiation surface 2a and dehydrated and dried by the heat radiation cycle of the heat pipe, and the electrical temperature control method is designed to prevent sudden temperature drop. It is preferable to use control.

FIG. 4 shows a second embodiment of the present invention, in which a pair of heat radiating parts 1, 1 are surrounded by a heat insulating material 7 other than the heat radiating surface 2a, and are mounted on a roof via a movable frame 9 having casters 8. It is arranged and configured in the form of
Each of the heat dissipation surfaces 2a is inclined, and the material to be dried 5 may be appropriately attached to these heat dissipation surfaces 2a. In addition, CON in the figure is a temperature controller, and the output end of temperature sensor TH is connected to it.
The TH operates in accordance with the detected temperature to control the energization of the commercial power supply AC to the season heater H, thereby making it possible to set the heat radiation surface 2a to a desired temperature.

Figure 5 shows the electrical configuration, in which a series circuit of triac TRIAC and sheathed heater H is connected to the commercial power supply AC200V via breaker BLK and power switch SW, and triac TRIAC is connected to temperature controller CON. The firing angle is controlled according to the temperature of the heat radiation surface 2a.

FIG. 6 is a circuit configuration diagram showing FIG. 5 more specifically, and the same parts as in FIG. 6 are given the same reference numerals. The commercial power supply side, including the breaker, is shown in AC.

The IC is an integrated circuit for triac control, and has the function of comparing the signal voltages input to terminals 3 and 4, and sending an ignition signal from terminal 6 to the triac TRIAC according to the comparison result. This is what we are doing. Terminal 8 is an input terminal for detecting the zero-crossing timing of the commercial power supply AC, and is connected through a phase shift circuit consisting of a capacitor C ₃ and a resistor R ₁₅ connected to both ends of the series circuit of the commercial power supply AC and the power switch SW. A signal is given. Note that terminals 7 and 5 are power supply terminals.

On the other hand, capacitor C ₁ , resistor R ₁₄ , diode D ₂
The series circuit is to create the DC power necessary for the operation of the electronic circuit section, and is connected to both ends of the series circuit of the commercial power supply AC and power switch SW, rectified by diode D ₂ , and connected to resistor R ₁₄ . By stepping down the voltage and smoothing it with capacitor _C1 , a low DC voltage is obtained across capacitor _C1 .
The power supply terminals 7 and 5 of the integrated circuit IC are connected to both ends of the capacitor C ₁ , as well as a resistor R ₃ for creating a temperature signal, a temperature sensor TH, and a resistor.
A series circuit of R ₁₀ and a diode D ₁ is connected, and the connection point between the temperature sensor TH and the resistor R ₁₀ is connected to the terminal 4 of the integrated circuit IC via the resistor R ₁₉ . In addition,
Both ends of variable resistor VR are resistor _R9 , temperature sensor TH,
connected in parallel with a series circuit of resistor R ₁₀ , variable resistance
The movable terminal of VR connects to the temperature sensor via resistor _R11 .
It is connected to the connection point of TH and resistor _R10 , and the set temperature can be adjusted by changing the level of the temperature signal.

On the other hand, programmable union transistor Q ₃ , transistor Q ₂ , capacitor C ₂ ,
Resistors R ₁ to R ₈ constitute an oscillation circuit,
The oscillation signal that appears at the connection point of resistors R ₆ and R _7
18 to terminal 3 of the integrated circuit IC. Transistor _Q1 controls the power supply to the above oscillation circuit, and its base is connected to the connection point between resistor _R3 and temperature sensor TH, and starts and stops oscillation at a predetermined temperature. It is configured so that In addition, the capacitor
The series circuit of C ₄ and resistor R ₁₄ is a triac.
surge absorption circuit to absorb the surge of
ZNR is a surge absorber that absorbs surges from commercial power AC, and Ne is an Onn tube for displaying operation.

In operation, the oscillation of the programmable unidirectional transistor Q ₃ causes the resistors R ₆ ,
A sawtooth signal appears at the connection _R7 , which is input to terminal 3 of the integrated circuit IC. On the other hand, a signal in which a signal that follows temperature changes and a signal set by the variable resistor VR are superimposed is input to the terminal 4 of the integrated circuit IC. Then, in the integrated circuit IC, the signals input to terminals 3 and 4 are compared, and when the two signals match, the triac TRIAC is fired. Therefore, when the temperature of the heat dissipation surface changes, the point at which both signals match, that is, the arc phase, changes. When the temperature is low, the ignition phase advances, and when the temperature is high, the ignition phase is delayed, and the sheathed heater The power supplied to H is controlled to keep the temperature of the heat radiation surface constant.

7 and 8 show a third embodiment of the invention. If the container is completely airtight and a heating medium 4 such as fluorocarbon is used during heating, the internal pressure of the container 2 will increase, so the container must be constructed to withstand this pressure. The problem arises that it costs too much. Therefore, this embodiment is characterized in that a part of the steam in the container 2 is allowed to escape to the outside, thereby simplifying the container structure and preventing the increase in cost.

That is, a tubular steam vent pipe 2A communicating with the inner chamber is connected to the upper part of the container 2. This steam vent pipe 2A has its branch pipes 2 at three locations, for example, at both ends and in the center of the upper surface of the container.
A ₁ to 2 A ₃ are connected and collected into a single tube at the center, extending downward on the back side of the container 2, and the lower end thereof is a condensate reservoir having a cylindrical shape with a bottom, for example. Heat medium water inlet 2 in the upper opening of 2B
It is temporarily installed in _B1 . A pipe P ₁ is provided at the bottom of the condensate reservoir 2B, and this pipe P ₁ is connected to a pipe P ₂ provided at the bottom of the container ₂ . The structure is equipped with a drain valve DB for draining water when replacing the heat medium. Since the other configurations are substantially the same as those of the first embodiment,
Similar parts will be given the same reference numerals and detailed descriptions will be omitted.

The heat medium 4 is then heated and vaporized by the sheathed heater H to become vapor, which moves upward at high speed and condenses and liquefies, but in this case, the pressure inside the container 2 increases. Therefore, a part of the steam is discharged through the steam vent pipe 2A to the condensate reservoir section 2B, which stores the condensed and liquefied heat medium, to prevent the pressure inside the container 2 from increasing more than necessary. Therefore, the container 2 does not need to have a pressure-resistant structure. In addition, this condensate reservoir 2B has the function of replenishing the heat medium 4 that has decreased in the container 2, and is communicated with the lower part of the container 2 via pipes P ₁ and P ₂ . The heating medium 4 on the side of the reservoir 2B is configured to be able to circulate. Note that the drain valve DB is used when exchanging the heat medium 4, and by operating this drain valve DB, the heat medium in the container 2 and/or the condensate reservoir 2B can be drained to the outside.

In each of the above embodiments, the case where the sheathed heater H is used as the heating element constituting the heating means has been described, but it goes without saying that hot water may be flowed into the pipe to raise the temperature of the heat dissipation section 2. be.

(Effects of the Invention) As described above, according to the present invention, in a dryer for drying Japanese paper, the dryer is combined with a container having a heat dissipating section on which the washi paper is attached to a planar heat dissipating surface, The device is configured to include a heating medium provided in a container, and a heating means for vaporizing and condensing the heating medium to raise the temperature of the heat radiating section, and integrating the heat radiating section and the heat source, and opposite to the heat radiating surface. A temperature sensor for controlling the temperature of the heat dissipation surface is provided in the side heat dissipation section, the output of this temperature sensor is applied to a temperature controller, and the output of this temperature controller is used to control a triac connected to a heater provided in the heat dissipation section. In addition to the terminal,
Since the heater is configured to be controlled, the temperature of the heat dissipation surface to which the Japanese paper of the heat dissipation part is attached is uniformly raised, and the Japanese paper does not become too dry in some parts, improving workability and improving the heat dissipation surface. It has the advantage of being able to raise the temperature quickly.

In addition, since the heat dissipation part and the heat source are integrated, compared to the conventional type that burns heavy oil through a burner, it does not take up much space and is superior in safety.

Furthermore, since the heat dissipation section equipped with a heater is controlled via a temperature sensor, a temperature controller, a triax, etc. so as to prevent a sudden temperature drop, it is possible to obtain a product to be dried of stable quality.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view of a heat dissipation section used in the present invention, FIG. 2 is an overall perspective view of the same, and FIG. 4 is a perspective view of the second embodiment of the present invention; FIG. 5 is a schematic diagram showing the electrical configuration used in the present invention; FIG. 6 is a specific circuit example of the same; 7
8 and 8 are respectively a perspective view and a side sectional explanatory view of the third embodiment of the present invention, and FIG. 9 is a conventional example and a tenth embodiment.
The figure is a longitudinal cross-sectional view. 1... Heat radiation part, 2... Container, 2a... Heat radiation surface,
2A... Steam vent pipe, 2B... Condensate reservoir,
3... Heating means, 4... Heat medium, 5... Material to be dried,
H...Sheathed heater, TH...Temperature sensor.

Claims (1)

[Claims] 1. In a dryer for drying Japanese paper, the dryer is equipped with a container having a heat radiating part on which the Japanese paper is attached to a planar heat radiating surface, a heat medium provided in the container, and a heat medium disposed in the air. and a heating means for raising the temperature of the heat dissipation section by condensing and condensing the heat dissipation section, the heat dissipation section and the heat source are integrated, and the heat dissipation section on the opposite side of the heat dissipation surface is provided with a temperature for controlling the temperature of the heat dissipation surface. A sensor is provided, the output of this temperature sensor is applied to a temperature controller, and the output of this temperature controller is applied to a control terminal of a triax connected to a heater provided in the heat dissipation part to control the heater. Surface dryer.