JP2003083678A - Equipment and method for drying - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment and method for drying by which both workability improvement and energy conservation can be realized. SOLUTION: The drying equipment 11 is constituted by successively providing a heating chamber 40 which heats a gas fed by means of a blower 30, a drying chamber 50 to which the heated gas is introduced, and a discharge pipe 58 for leading-out the gas from the chamber 50 in the flow passage of a casing main body 12 in this order from the upstream side. The casing main body 12 is provided with a top lid section 19 having an opening 15 which is provided for bringing in and out an object to be dried and can be opened and closed freely and a flow passage changing pipe section 48 which communicates the heating chamber 40 and drying chamber 50 with each other in a freely attachable and detachable state on the top faces 43 and 52 sides of the chambers 40 and 50 so that, when the lid section 19 is put on the equipment 11, a flow passage 70 through which the heated gas 71 is made to flow down vertically from the top face 52 side to the bottom face 54 side of the drying chamber 50 may be formed freely. In this case, it is preferable to provide a one-side branch pipe 58a connected to the blower 30 side and the other-side branch pipe 58b from which the heated gas 71 is discharged through a heat exchanger 60.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus and method suitable for efficiently drying various materials to be dried to which liquids such as water and hydrocarbons are attached.

[0002]

2. Description of the Related Art In the removal of stains adhered to various members such as electronic parts and pressed parts and the plating process, a cleaning method and a plating method according to the characteristics of individual objects are adopted. The object after finishing the plating or plating is subjected to a drying treatment by an appropriate drying method determined in consideration of its specific shape and the relationship between the cleaning agent, the plating solution and the rinsing solution used.

In this case, the above-mentioned drying methods are roughly classified into a vaporization drying method and a physicochemical drying method, and a drying method in which these are combined, and the drying method to which the present invention is applied is Since it belongs to the category of the vaporization drying method, the vaporization drying method will be described in more detail below.

That is, in the vaporization drying method, a generally used hot (hot) air drying method, or evacuation of the drying chamber to lower the boiling point of the adhering liquid to accelerate the drying speed, Vacuuming (decompression) drying method suitable for promoting the drying of the adhered liquid that has entered between the objects to be cleaned and the blind holes,
There is a radiant heat drying method used as an auxiliary means of the above-mentioned warm air drying method or vacuum suction drying method by radiant heat or molecular motion using a far infrared heater or the like.

Among the above-mentioned vaporization drying methods, as a conventional technique relating to a warm (hot) air drying method to which the present invention is applied, there is a drying device having a structure shown in FIG. 6 (hereinafter referred to as "conventional device"). .).

According to the above-mentioned conventional apparatus, the outside air taken in from the intake side through the blower 1 is heated by passing through the heater 2 disposed on the way, and the heated warm air is blown by the blower duct 3 It is sent from the side surface 4a of the drying chamber 4 into the inside of the drying chamber 4 through the exhaust gas and can be exhausted through the exhaust duct 6 connected to the bottom surface 4b. The drying chamber 4 is provided with a lid 5 on its upper surface 4c, and the lid 5 can be opened / closed to allow an article to be dried in and out. In the figure, reference numerals 7 and 8 denote dampers for adjusting the air flow, and 9 denotes a drain for draining water.

[0007]

Therefore, according to the above-mentioned conventional apparatus, the hot air supplied through the heater 2 passes through the material to be dried in the drying chamber 4 in a non-uniform manner, so that the material to be dried is dried. There is the inconvenience that the objects may scatter or be deformed in the drying chamber 4, which requires a long drying time.

Further, in the above-mentioned conventional apparatus, by adjusting the opening degree of the dampers 7 and 8, a part of the warmed air flowing down the exhaust duct 6 is taken into the blower duct 3 side for reuse. As a result, although the heat energy of the heater 2 can be effectively used, there is also a problem in that the rest of the heated air is wastefully discharged into the atmosphere without being effectively used.

In view of the above-mentioned problems of the conventional apparatus, the present invention provides a drying apparatus and a method thereof which can improve the workability and can well cope with the energy saving measures required by the times. There is a purpose.

[0010]

The present invention has been made to achieve the above object, and a first invention (apparatus) among them is a blower that takes in at least gas and sends it to a downstream side, and the blower. A heating chamber for introducing and heating the gas sent via the heating chamber, a drying chamber for introducing the heated gas through the heating chamber, and a discharge pipe for leading the gas through the drying chamber. In a drying device arranged in a casing main body in order from an upstream side in a flow path, the casing main body includes an upper lid portion which is provided on an upper wall surface side thereof and which is capable of opening and closing an opening for putting in and out an object to be dried. At the same time, the upper lid portion is provided with a flow path changing pipe portion that allows the heating chamber and the drying chamber to communicate with each other at their top surfaces so that they can come into contact with and separate from each other.
A characteristic feature of the structure is that a flow path that allows the gas heated through the heating chamber to flow down vertically from the top surface side to the lower surface side of the drying chamber is freely formed when the lid is applied.

In this case, a part of the heated gas that has passed through the drying chamber can be reused by interposing a one-side branch pipe that is guided to the blower side on the downstream side of the discharge pipe. At the same time, it is possible to preheat the gas newly taken in by the residual heat of the remaining part of the gas in the heated state by interposing the other side branch pipe leading to the heat exchanger provided in the flow path on the upstream side of the blower. Can also be

On the other hand, the second invention (method) is carried out by using the above apparatus, and in particular, in a flow path for taking in and flowing down gas through a blower, a gas heat treatment is performed from the upstream side thereof. In a drying method for sequentially performing a drying process on the material to be dried, a part of the gas that is still in a heated state that has undergone the drying process is taken in the flow path through the blower and reused, The rest is preferably used as a heat source for preheating the gas newly taken in through the blower by passing through a heat exchanger.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a device of the present invention (first invention).
FIG. 2 is a schematic front view, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof.

According to these drawings, the casing main body 12 constituting the drying device 11 has an enclosing frame portion 13 made of a metal material such as stainless steel capable of forming an enclosing space having a substantially rectangular parallelepiped shape, and the enclosing frame. The part 13 is formed by a surrounding wall part 14 made of a synthetic resin plate material or a metal plate material such as stainless steel, which covers each surface direction surrounded by the part 13, and its overall size is, for example, 1000 mm (width) × when viewed from the front side. 1
It is 900 mm (depth) x 1050 mm (height).

The casing body 12 has an operation panel 16 provided with a predetermined operation switch 16a and the like on the upper right side of the side wall surface 14a located on the front side of the surrounding wall portion 14 thereof. The casters 17 with adjusters are arranged at the four corners of each.

Further, the casing main body 12 has an upper wall surface 1 for allowing the basket 55 containing the material to be dried 56 to enter and exit.
4c, an opening 15 formed on the front side of the 4c, and the opening 15
And an upper lid portion 19 that is freely opened and closed.
Note that reference numeral 29 in FIG. 1 indicates a lock mechanism for locking the upper lid part 19.

On the other hand, the internal space 18 of the casing body 12
The air blower 30 takes in a gas 71 made of an inert gas such as air or nitrogen gas from the outside through an air supply pipe 34 and sends the gas 71 to the downstream side, and the gas 71 sent by the blower 30 is first sent. A heating chamber 40 for introducing and heating via a trachea 35, and a drying chamber 50 for introducing a gas 71 heated via the heating chamber 40 via a second air supply pipe 47.
And a discharge pipe 58 for leading out the gas 71 that has passed through the drying chamber 50 are sequentially arranged in the flow path 70 from the upstream side.

In this case, the blower 30 has an intake port 31a connected to the air supply pipe 34 directly or via the filter 72 and an outlet port 31b connected to the first air supply pipe 35 as shown in FIG. It is possible to preferably use a turbo type that is formed by housing an impeller 33 that is driven and controlled by a motor 32 in the casing 31 that it has, and it is also possible to use a capacity type or the like if necessary. In addition,
Reference numerals 73 and 74 shown in FIG. 5 respectively denote dampers for flow rate adjustment.

The heating chamber 40 has an inlet 44 connected to the first air supply pipe 35 on the lower surface 42 side and an outlet 45 connected to the second air supply pipe 46 on the top surface 42 side. In addition, a heating means 46 made of nichrome wire or the like is installed in the heating zone 41 so that the temperature can be controlled freely.

Further, the drying chamber 50 has an inlet port 53 connected to the second air supply pipe 47 on the top surface 52 side and an outlet port 55 connected to the discharge pipe 58 on the lower surface 54 side. In addition, a basket 56 for accommodating an appropriate material to be dried 57 that is freely formed in and out of the drying zone 51 via the inlet 53 is provided.

Moreover, the heating chamber 40 and the drying chamber 50 communicate with each other through the second air supply pipe 47, and the specific structure thereof will be described in detail below with reference to FIGS. 4 and 5. To do.

That is, the casing body 12 has an opening 15 (one side opening 15a) formed in the upper wall surface 14c thereof.
And an opening 15b on the other side) are provided so as to be freely opened and closed. The upper lid 19 includes an upper lid main body 20 and a flow path attached to the upper lid main body 20. The change pipe portion 48 and the flow passage change pipe portion 48 together with the upper lid main body portion 2
And a cover portion 22 that covers 0. The flow path changing pipe portion 48 is arranged so that the heating chamber 40 and the drying chamber 50 communicate with each other on the top surfaces 43 and 52 side so that they can come into contact with and separate from each other. It is formed by presenting.

In this case, the flow path changing pipe portion 48 occupies the main portion of the second air supply pipe 47, and as is clear from FIG. 5, when the upper lid portion 19 is covered, its one side pipe end. Four
One side opening portion 15 where 8a communicates with the outlet 45 of the heating chamber 40
a and the other-side opening 15b where the other-side tube end 48b communicates with the introduction port 53 of the drying chamber 50 are connected so as to face each other, and the second air supply tube 47 is formed as a whole. become.

FIG. 4 exemplifies the opening / closing structure of the upper lid portion 19 in this case. The upper lid main body portion 20 has a lead-out port 45 (one side opening portion 15a) of the heating chamber 40 at the time of applying the lid.
And a hole 20b (other side opening 15b) facing the inlet 53 of the drying chamber 50.

The upper wall surface 14c of the casing body 12
A pair of guide rails 21 and 21 are arranged along the moving direction of the upper lid portion 19 (upper lid body portion 20) that opens and closes the one-side opening portion 15a and the other-side opening portion 15b.

A guide rail 21,
Rollers 23 guided by the respective guide grooves 21a of 21 are separately arranged via a support shaft 23a, and can be freely advanced and retracted via the rollers 23.
In FIG. 4A, the guide groove 21a provided in each guide rail 21 is divided into two parts so as to impart a stopper function for restricting the advance / retreat of each roller 23 at a constant stroke. However, they may be formed by communicating without dividing.

Under the arrangement relationship, the one side pipe end 48a facing the one hole 20a and the other side pipe end 48b facing the other hole 20b face each other. The flow passage changing pipe portion 48 is installed on the upper lid body portion 20, and the flow passage changing pipe portion 48 is covered with the cover portion 22.

In this case, the flow path changing pipe portion 48 has a spring member 24 such as a coil spring interposed between the support arm portion 65 attached to the flow path changing pipe portion 48 and the upper lid main body portion 20. It is attached to the side of the upper lid main body portion 20 in a floating state, and when the flow path changing pipe portion 48 is pressed from above, the one side pipe end 48a and the other side pipe end 48b have corresponding hole portions 20a, It can be pushed down below 20b.

Moreover, the upper lid main body 20 and the flow path changing pipe 4
8 and the handle 25 as shown in FIG.
When one is operated, the one side opening 15a of the casing body 12
A link mechanism 26 that can press the flow path changing pipe portion 48 itself toward the other side opening portion 15b is provided.

That is, the flow path changing pipe portion 48 has a flange portion 49 at each of the one side pipe end 48a and the other side pipe end 48b.
And a plurality of crank portions 81 arranged via these flange portions 49. Further, each crank portion 81 located on one side in the length direction of the flow path changing pipe portion 48 is one side supporting rod portion 82, and each crank portion 81 located on the other side surface side is the other side supporting rod. It is swingably connected to the portion 83.

Further, each of the one-side supporting rod portion 82 and the other-side supporting rod portion 83 is connected to the connecting supporting rod portion 85 via the fixed supporting arm portion 84 at the tip end side thereof, and the connecting supporting rod portion 85 is connected. Rod 85
Are rotatably supported by bearings 86.

Moreover, the connecting rod 85 is connected and fixed to the handle 25 which is bridged via the supporting arms 87, 87 fixedly arranged at both ends thereof, and the link mechanism 26 is constituted as a whole. ing. In other words, handle 2
5 is pushed down, the one side pipe end 48a of the flow path changing pipe portion 48 is moved to the outlet port 45 (one side opening portion 15a) side of the heating chamber 40 and the other side pipe end is resisted against the biasing force of the spring member 24. 48b can be brought into close contact with the inlet 539 (other side opening 15b) of the drying chamber 50. In addition, it is preferable that the close contact structure obtained at this time is provided with a sealing member 66 such as packing between each other, for example, on the opening 15 side so that more preferable airtightness can be provided.

In the flow path 70 on the way from the air supply pipe 34 to the blower 30, as shown in FIG.
Are intervening.

Further, the pipe line 34a located between the heat exchanger 60 and the blower 32 communicates with the one-side branch pipe 58a located on the downstream side of the discharge pipe 58, and the heating state through the drying chamber 50 is established. A part of the gas 71a in the gas is sent to the downstream side of the heat exchanger 60 and can be reused.

The other side branch pipe 58b, which is also located on the downstream side of the discharge pipe 58, is connected to the exhaust pipe 61 after passing through the heat exchanger 60 interposed in the flow passage 70,
As a result, it is possible to preheat the gas 71 newly taken in from the air supply pipe 34 by utilizing the residual heat of the remaining portion 71b of the gas which is still in a heated state flowing down the exhaust pipe 58. The discharge pipe 58 is provided with a wire net, a punching board, or the like (not shown) for the purpose of rectifying or adhering moisture, and a drain 59 for draining water or the like at an appropriate position on the lower surface 54 side of the drying chamber 50. It is arranged.

Next, the second invention (drying method) will be described together with the operation of the drying device 11 of the illustrated example. The link mechanism 26 and the lock mechanism 29 in the operating state are handled by the handle 25.
Is released by pulling it upward, and the one side pipe end 48a of the flow path changing pipe portion 48 is connected to the outlet port 45 of the heating chamber 40 (the one side opening portion 15
From the a) side, the other side pipe end 48b is connected to the inlet port 53 of the drying chamber 50.
After being separated from the (other-side opening portion 15b) to eliminate the close contact state, the upper lid portion 19 is moved along the guide rail 21 in the inward direction, so that the opening portion 15 of the casing body 12 (the other-side opening portion 15b). The opening 15b) can be exposed.

Next, the basket 5 containing the material 57 to be dried
6 is an opening 15 of the casing body 12 (the other side opening 1
5b) and the inlet 53 of the drying chamber 50, and then accommodated in the drying zone 51. After that, by performing a procedure reverse to the above-described opening operation, the upper cover 19 opens the opening 15 of the casing body 12. Cover. At this time, since the worker can store the basket 5 in a comfortable posture while standing without bending forward, the working efficiency can be improved.

After the opening 15 of the casing body 12 is covered with the upper cover 19, the operation switch 16 of the operation panel 16 is provided.
The drying device 11 is activated by operating a, etc., and voltage is applied to the motor 32 and the heating means 46 to prepare for the drying process.

Thus, the blower 30 that has started driving takes in new gas 71 from the air supply pipe 34 with the heat exchanger 60 interposed, as shown in FIG.
It is sent to the heating chamber 40 via 5.

In the heating chamber 40, the temperature is controlled in advance by the heating means 46 so that the heating zone 41 has a predetermined temperature atmosphere. Therefore, when passing through the heating zone 41, the gas 71 is also heated to a predetermined temperature. Raise to temperature.

Gas 71 which has been heated up through the heating chamber 40
Is sent to the drying chamber 50 through the second air supply pipe 47. At this time, the gas 71 flows from the top surface 52 side of the drying chamber 50 to the lower surface 54 through the flow path changing pipe portion 48 of the second air supply pipe 47.
For example, the temperature is about 20 to 150 degrees Celsius and the air flow rate is about 3 to 50 m / sec. Therefore, while simplifying the structure of the entire apparatus, turbulent flow can be obtained even if the dried material 56 is a small piece having a complicated shape or overlapping if a suitable wind pressure and wind speed are given. Since it does not occur, it is quick without scattering,
And it can be dried stably.

Then, the gas 71 after vertically flowing down the drying chamber 50 at a high speed flows into the discharge pipe 58. Moreover, the downstream side of the discharge pipe 58 is branched into the one-side branch pipe 58a and the other-side branch pipe 58b, and the one-side branch pipe 58a is located between the heat exchanger 60 and the blower 30. The pipe line 34a and the other side branch pipe 58b are connected to the exhaust pipe 61 after passing through the heat exchanger 60.

For this reason, a part of the gas 71a which is still heated after passing through the drying chamber 50 is sent to the heating chamber 40 through the first air supply pipe 35 by the blower 30 and is reused. It can save the consumption of heat energy.

The remaining portion 71b of the gas, which has passed through the drying chamber 50 and is still in a heated state, is once introduced into the heat exchanger 60 through the other side branch pipe 58b, and then exhausted through the exhaust pipe 61. It will be. Therefore, the gas 71 newly taken in from the air supply pipe 34 is preheated when passing through the heat exchanger 60 and its temperature rises, and can be sent to the heating chamber 40 in a state of being heated to a certain degree. It can save the consumption of heat energy. Further, from the other side branch pipe 58b, through the heat exchanger 60, to the exhaust pipe 6
The remaining part 71b of the gas flowing down to 1 is cooled and exhausted when passing through the heat exchanger 60, and thus an environment-friendly exhaust system can be constructed. By adjusting the openings of the dampers 73 and 74, if the amount of the liquid adhering to the material to be dried 57 is small, the flow rate of the liquid is reused as much as possible such that one side branch passage 71a> other side branch passage 71b. If the amount of liquid adhered is large, the one-side branch passage 71
It is possible to prevent the humidity of the gas supplied as warm air as a <the other side branch passage 71b from increasing.

Thus, after finishing the drying process for this time, the procedure opposite to the procedure for storing the basket 56 in the drying zone 51 by operating the operation switch 16a of the operation panel 16 or the like to stop the drying device 11 is performed. Can be taken out from the drying chamber 50 by stepping on. By repeating such a series of operations, the drying process for the material to be dried 57 can be smoothly performed with good workability.

The present invention has been described above based on the illustrated examples, and the specific embodiments thereof are not limited thereto. For example, the upper lid portion 19 may be a single-opening type to the front side or the left and right sides by attaching via a hinge instead of the above-described sliding type opening / closing structure. The flow path changing pipe portion 48 provided in the upper lid portion 19 has an appropriate shape other than the inverted U-shape shown in the illustrated example as long as it can make a U-turn of gas. May be.

In addition, although the present invention employs the upper lid portion 19 which allows the material to be dried 57 to be taken in and out in a comfortable posture while standing, the discharge pipe 58 and the exhaust pipe 61 are provided without interposing the heat exchanger 60. You may make it connect directly. Further, as the heating means 46, if the temperature inside the heating zone 41 can be controlled freely, an appropriate heating device such as a ceramic heater can be used.

[0048]

As described above, according to the present invention, the gas whose temperature is increased by passing through the heating chamber is directed from the top surface side to the bottom surface side of the drying chamber through the flow path changing pipe portion. Since the vertical flow can be carried out without generating a turbulent flow, even the dried objects of the overlapping small pieces can be dried quickly and stably without being scattered.

Moreover, the articles to be dried are put in and taken out by using the inlet provided on the top surface of the drying chamber in correspondence with the upper lid, so that the worker stands up without taking a crouched posture such as forward bending. The work efficiency can be remarkably enhanced because the work can be performed in the same posture as it is.

Further, the downstream side of the discharge pipe is branched into one side branch pipe and the other side branch pipe, and the one side branch pipe is branched to the pipe line located between the heat exchanger and the blower. If the pipes are respectively connected to the exhaust pipes after passing through the heat exchanger, it is possible to construct an environment-friendly drying system for saving the consumption of heat energy.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an example of a device of the present invention (first invention).

FIG. 2 is a schematic front view of the same as above.

FIG. 3 is a schematic front view of the same as above.

4A and 4B are explanatory views showing an example of the positional relationship between the upper lid main body portion and the flow path changing pipe portion that form the upper lid portion, FIG. 4A being a perspective view of a main portion thereof, and FIG. The views are shown respectively.

FIG. 5 is an explanatory diagram showing a flow channel system according to an example of the present invention.

FIG. 6 is an explanatory diagram showing a schematic configuration example of a conventional drying device.

[Explanation of symbols]

11 Dryer 12 Casing body 13 Surrounding frame 14 wall 14a Side wall surface 14b bottom wall 14c Upper wall 15 openings 15a One side opening 15b Other side opening 16 Operation panel 16a operation switch 17 Caster with adjuster 18 Internal space 19 Upper lid 20 Top lid body 20a, 20b holes 21 Guide rail 21a guide groove 22 Cover 23 roller 23a spindle 24 Spring material 25 handles 26 Link mechanism 29 Lock mechanism 30 blower 31 casing 31a intake port 31b exit 32 motor 33 impeller 34 Air supply pipe 34a pipeline 35 First air pipe 40 heating chamber 41 heating zone 42 Lower surface 43 top 44 entrance 45 Outlet 46 heating means 47 Second air pipe 48 Flow path changing pipe 48a One side pipe end 48b other side pipe end 49 Flange 50 drying room 51 Drying zone 52 Top 53 entrance 54 Lower surface 55 exit 56 baskets 57 Items to be dried 58 Discharge pipe 58a One side branch pipe 58b Other side branch pipe 59 drain 60 heat exchanger 61 Exhaust pipe 65 support arm 66 sealing member 70 channels 71 gas 71a Part of gas 71b Gas balance 81 Crank part 82 One-sided support 83 Other side support 84 Fixed support arm 85 Connection rod 86 Bearing 87 Support arm

Claims (4)

[Claims] 1. A blower that takes in at least gas and sends it out to a downstream side, a heating chamber that introduces and heats the gas sent through the blower, and a drying process in which the gas heated through the heating chamber is introduced. In a drying device in which a chamber and a discharge pipe for discharging a gas that is still in a heated state that has passed through the drying chamber are sequentially arranged in the casing body from the upstream side in the flow path, the casing body is An upper lid portion is provided on the upper wall surface side for opening and closing the opening for loading and unloading the material to be dried. A flow path changing pipe part that allows free communication is provided, and a flow path that allows the gas heated through the heating chamber to flow vertically from the top surface side to the bottom surface side of the drying chamber when the lid is covered is freely formed. The drying device characterized in that 2. A part of the heated gas passing through the drying chamber can be reused by interposing a one-side branch pipe guided to the blower side on the downstream side of the discharge pipe. It is possible to preheat the gas newly taken in by the residual heat of the remaining part of the gas in a heated state through the branch pipe on the other side introduced to the heat exchanger provided in the flow path on the upstream side of the blower. The drying device according to claim 1. 3. A drying method, characterized in that an object to be dried is dried using the drying apparatus according to claim 1. 4. A drying method in which a gas heating process and a drying process for a material to be dried are sequentially performed from the upstream side in a flow path in which a gas is taken in via a blower to flow down, and a heating state after the drying process is performed. Some of the gas in
It is taken in the flow path via the blower and reused, and the rest is used as a heat source for preheating the gas newly taken in via the blower by passing through a heat exchanger. Characterizing drying method.