JP5861066B2 - Hot air circulation heating device - Google Patents

Description

  The present invention relates to a hot-air circulating heating device that heat-treats a work that is a breathable article to be heated.

Conventionally, in a method of manufacturing an interior material for automobiles, as a hot air circulation type heating device for heating a breathable plate-like body as an intermediate product, an object to be heated of the breathable plate-like body is installed in the main body. Then, there is a heat treatment using air as a medium (see, for example, Patent Document 1 ).
FIG. 9 is a view showing a heating furnace for heating an object to be heated of a conventional air permeable plate-like body described in Patent Document 1. As shown in FIG.

  In FIG. 9, 1 is a furnace body, and 2 is a net conveyor penetrating the inside of the furnace chamber. A hot air blowing box 3 having a large number of outlets is installed on the ceiling of the furnace chamber, and hot air supplied from the hot air generator 5 is blown onto the upper surface of the air-permeable plate-like body W. A suction box 4 is installed below the net conveyor 2, hot air is sucked from a suction port formed on the upper surface thereof, and is circulated to the hot air generator 5 by a heat-resistant blower 6.

  JP 2010-216056 A

  However, in the conventional configuration, when drying a breathable heated object, the hot air to be blown passes through a place with less air resistance, that is, around the heated object, so that the drying time of the heated object becomes longer, There has been a problem that the apparatus becomes larger.

  An object of the present invention is to provide a hot air circulation type heating device capable of shortening the drying time of a workpiece which is an object to be heated in consideration of the problem of the conventional heating device.

The first aspect of the present invention is
A hot air circulation type heating device for heating and drying a breathable work by circulating hot air in the furnace body,
A tray with a hole to support the workpiece;
A suction duct provided under the tray for sucking the hot air,
By raising the suction duct, the suction duct can be in close contact with the tray, and heated and dried in close contact with the tray.
The raising and lowering of the suction duct is realized by raising the suction duct using the negative pressure of the fan circulating the hot air, and stopping the fan and lowering the suction duct. and a heat-air circulating type heating apparatus.

The second aspect of the present invention
A hot air circulation type heating device for heating and drying a breathable work by circulating hot air in the furnace body,
A tray with a hole to support the workpiece;
A suction duct provided under the tray for sucking the hot air,
By raising the suction duct, the suction duct can be in close contact with the tray, and heated and dried in close contact with the tray.
A cam plate is attached to the chain that conveys the tray,
A cam follower member is attached to the suction duct,
The cam plate is moved by the movement of the chain, by the cam plate for the moving impinges on the cam follower member, said raising the suction duct, also characterized by lowering a thermal air circulation type heating device.

The third aspect of the present invention provides
In the portion of the suction duct that comes into contact with the tray, a gasket and a stopper that regulates the amount of deformation of the gasket are provided,
The hot air circulation heating device according to the first or second aspect of the present invention, wherein the stopper is disposed inside the gasket.

  As described above, according to the hot air circulation type heating device of the present invention, the drying time can be shortened for a work having air permeability.

The figure explaining the structure of the hot air circulation type heating apparatus in Embodiment 1, 2, and 3 of this invention. The figure explaining the air flow with respect to the workpiece | work in Embodiment 1 of this invention. The figure explaining the raising / lowering of the suction duct using suction pressure in Embodiment 2 of this invention The figure explaining the raising / lowering of the suction duct using the horizontal movement of the chain in Embodiment 3 of this invention (A), (b), (c) is a figure explaining the change of the raise of the suction duct, and the fall in the said Embodiment 3. FIG. The figure explaining the position of the workpiece | work and suction duct in Embodiment 1,2,3 of this invention The figure which shows the modification of Embodiment 3 of this invention The figure explaining the raising and lowering of the suction duct in the modification shown in FIG. The figure which shows the structure of the conventional heating apparatus described in patent document 1

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic diagram for explaining the configuration of a hot-air circulating heating device according to Embodiments 1, 2, and 3 of the present invention.

  This hot air circulation type heating device is surrounded by a heat insulating material such as glass wool, and includes a box-shaped main body 11 that forms a sealed space for storing a work 12 having air permeability.

Work 12 of breathable, for example, a circular cylindrical ceramic member, and at a diameter of about 150 mm × height 150 mm. The number of workpieces 12 may be one or more.

  A fan 13, a motor 15 and a shaft 14 are provided for circulating air. The fan 13 is, for example, a sirocco fan or a turbo fan.

  In order to heat the air, the heater 16 is provided and the temperature sensor 17 is used, and the power supplied to the heater 16 is PID controlled by a control unit, for example, a relay circuit, so that the temperature inside the workpiece 12 is kept constant. It is supposed to be kept. The set temperature is a drying temperature of the solvent impregnated in the work 12, and is set to a temperature of about 150 ° C to 160 ° C.

  As shown by the arrow, the circulating hot air is sucked from the lower side of the work 12 and is blown out from the work 12 by the fan 13 through the heater 16.

(Embodiment 1)
FIG. 2 shows the first embodiment of the present invention and is a schematic diagram for explaining the air flow with respect to the workpiece 12 and the conveyance mode.

  There is a blow-out duct 18 above the work 12, and there is a tray 19 that supports the work 12 while being in close contact with the work 12. A suction duct 20 is disposed below the tray 19. Yes. A hole 31 is opened at the center of the tray 19.

  Air is sucked into the suction duct 20 from the upper side of the work 12 through the inside of the work 12 as indicated by an arrow. The suction duct 20 is moved up and down by a lifting device (for example, a cylinder device) 30. When the suction duct 20 is raised, the gasket 22 fixed around the upper end of the suction duct 20 is brought into close contact with the lower surface of the tray 19 to ensure confidentiality. Can be aspirated. As a result, useless warm air flow is eliminated and drying efficiency is improved.

  A stopper 23 that defines the amount of collapse of the gasket 22 is fixed to the upper end of the suction duct 20 and inside the gasket 22.

  Further, a chain 24 for conveying the tray 19 is connected to the tray 19 so as to sandwich the suction duct 20 from the left and right. The chain 24 intermittently operates the tray 19 so that the center of the tray 19 stops at the center position of the suction duct 20.

In addition, since the stopper 23 regulates the deformation amount of the gasket 22, the life of the gasket 22 is extended, and further, by disposing the stopper 23 inside the gasket 22, the gasket 22 is not directly exposed to hot air, the life of the gasket 22 can extend bus.

(Embodiment 2)
FIG. 3 is a schematic diagram for explaining the rising and lowering states of the suction duct 20 using the negative pressure by suction in the second embodiment of the present invention. The description of the reference numerals shown in FIGS.

  The suction duct 20 is raised to the tray 19 side using the suction pressure generated by the rotation of the fan 13 and is brought into close contact with the tray 19. The workpiece 12 is disposed on the hole 31 at the center of the tray 19. Although the work 12 has air permeability, the air permeability has a structure in which a large number of thin holes are connected to allow gas to pass therethrough. Therefore, the work 12 has a flow path resistance, and the suction duct 20 can be brought into close contact with the tray 19 with negative suction pressure (see FIG. 3B). As a structure of the suction duct 20 for that purpose, an expansion / contraction part 25 is provided in the suction duct 20 so that it can be expanded and contracted by a negative pressure.

  The fan 13 can generate a pressure of 500 to 1000 Pa by using a sirocco fan or a turbo fan. Further, by stopping the fan 13, the pressure is reduced and the suction duct 20 is lowered by its own weight, so that a space can be provided between the suction duct 20 and the tray 19 (see FIG. 3A).

  The suction duct 20 is made of sheet metal to reduce the weight, and the stretchable part 25 is realized by a flexible duct. Accordingly, since it is not necessary to provide an elevating device for elevating the suction duct 20, the device can be made small and compact, and the price of the device can be reduced.

(Embodiment 3)
4, 5 (a), 5 (b), and (c) are schematic diagrams for explaining the rising and lowering states of the suction duct 20 using the movement of the chain 24 in the third embodiment of the present invention. The same reference numerals are used for the same components as those in FIGS. FIG. 5 is a side view of the apparatus shown in FIG. Only a part of the chain 24 is displayed. It should be noted, such as the chain is exaggerated for easy Ku understanding of the description.

Cam follower members 26 (upper cam follower member 26a and lower cam follower member 26b) are fixed at four locations on both side surfaces of the suction duct 20, and serve as a guide when the suction duct 20 is raised and lowered. On the other hand, an upper cam plate 27a and a lower cam plate 27b are provided on the upper chain 24a and the lower chain 24b, which are the transfer chains 24, respectively. By moving the chain 24 in order to move the tray 19, the suction duct 20 is raised and lowered.

That is, as shown in FIG. 5 (a), the upper cam follower member 26a which is fixed to the suction duct 20, and the lower cam follower member 26b, the upper chain 24a, upper cam plate fixed to the lower chain 2 4 b In a state where 27a and the lower cam plate 27b are not in contact with each other, the suction duct 20 is in a lowered state.

  Next, as shown in FIG. 5B, when the upper chain 24a moves to the left and the lower chain 24b moves to the right, the lower cam follower member 26b rides on the upper surface of the lower cam plate 27b. Thereby, the suction duct 20 fixed to the lower cam follower member 26b rises.

  Next, as shown in FIG. 5 (c), when the upper chain 24a further moves to the left and the lower chain 24b moves to the right, the lower surface of the upper cam plate 27a hits the upper cam follower member 26a. The member 26a is pushed down. As a result, the suction duct 20 fixed to the upper cam follower member 26a is lowered.

  Thus, the suction duct 20 can be raised and lowered at the same time using the mechanism for transporting the tray 19. Therefore, it is not necessary to provide another drive device for raising and lowering the suction duct 20, so that the entire device can be made small and compact, and the cost of the device can be reduced.

  FIG. 6 is a schematic diagram for explaining the mutual positional relationship among the work 12, the tray 19, and the suction duct 20 in the first, second, and third embodiments of the present invention. The same reference numerals are used for the same components as those in FIGS.

  The work 12 is disposed inside the suction duct 20, and hot air flows through the holes 31 of the tray 19. Even if the size of the workpiece 12 changes, if the type of the tray 19 is changed, the transfer and drying can be performed without changing the furnace body and the transfer system.

  The center of the hole 31 of each tray 19 in FIGS. 6A, 6B, and 6C and the center of the suction duct 20 coincide. Further, when the plurality of workpieces 12 are arranged on the tray 19, the centers of the plurality of workpieces 12 are arranged equally and symmetrically with respect to the center of the suction duct 20.

In the third embodiment described above, the cam plate 27 (the upper cam plate 27a and the lower cam plate 27b) and the cam follower member 26 are arranged at the inner position sandwiched between the upper chain 24a and the lower chain 24b. However, as shown in FIGS. 7 and 8, the cam plate 27 and the cam follower member 26 may be arranged so as to come outside the respective chains 24. In that case, since the chain 24 is located far from the tray 19, as shown in FIG. 7, the pin 24 can be interlocked by providing a pin member 32 that connects the chain 24 and the tray 19.

  In the above-described third embodiment, the suction duct is raised and lowered using the chain that moves the tray 19, but it is not always necessary to use the same chain, and different chains may be provided. Absent.

  The work of the present invention is not limited to a plate-like body as long as it is a breathable heated object such as a diesel exhaust gas purification catalyst DPF (diesel particulate filter).

  The hot-air circulating heating device of the present invention can shorten the drying time for a breathable object to be heated, and can reduce the size of the device, so that it can be used for drying a ceramic honeycomb structure.

  Specific examples of the breathable plate-like body include diesel exhaust gas purification catalyst DPF (diesel particulate filter) for reducing PM (particulate matter) in exhaust gas from diesel engine.

DESCRIPTION OF SYMBOLS 11 Main body 12 Breathable work 14 Shaft 15 Motor 16 Heater 17 Temperature sensor 18 Blowing duct 19 Tray 20 Suction duct 22 Gasket 23 Stopper 24 Chain 25 Flexible duct 26 Cam follower member 27 Cam plate

Claims (3)

A hot air circulation type heating device for heating and drying a breathable work by circulating hot air in the furnace body,
A tray with a hole to support the workpiece;
A suction duct provided under the tray for sucking the hot air,
By raising the suction duct, the suction duct can be in close contact with the tray, and heated and dried in close contact with the tray .
The raising and lowering of the suction duct is realized by raising the suction duct using the negative pressure of the fan circulating the hot air, and stopping the fan and lowering the suction duct. A hot air circulation type heating device. A hot air circulation type heating device for heating and drying a breathable work by circulating hot air in the furnace body,
A tray with a hole to support the workpiece;
A suction duct provided under the tray for sucking the hot air,
By raising the suction duct, the suction duct can be in close contact with the tray, and heated and dried in close contact with the tray.
A cam plate is attached to the chain that conveys the tray,
A cam follower member is attached to the suction duct,
The cam plate is moved by the movement of the chain, by the cam plate for the moving impinges on the cam follower member, raising the suction duct, also characterized by lowering the thermal air circulation type heating device. In the portion of the suction duct that comes into contact with the tray, a gasket and a stopper that regulates the amount of deformation of the gasket are provided,
The hot air circulation type heating device according to claim 1 or 2 , wherein the stopper is disposed inside the gasket .

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