JP2003090680A - Gas jetting treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance efficiency of treatment of work. SOLUTION: A gas jetting treatment apparatus is provided with a gas heating chamber 30 which forms a nearly closed space and where heat treatment is performed to the inside gas, a treating chamber 40 which forms a nearly closed space and inside which the work W is moved on a conveyor, and a chamber 20 which is placed between the gas heating chamber 30 and the treating chamber 40. The chamber 20 forms a nearly closed internal space 28. A gas inflow part 22 through which the gas in the gas heating chamber 30 flows into the internal space 28, nozzles 23 which are formed into tubular shapes that protrude into the treating chamber 40 and which jet the gas in the internal space 28 into the treating chamber 40, and the internal space 28 is formed so as to penetrate the chamber 20 in an isolated state. The chamber 20 is provided with gas incoming passages 24 through which the gas in the treating chamber 40 returns into the gas heating chamber 30.

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a gas ejection processing apparatus for ejecting a gas to an object to be processed, such as heating, cooling, and drying. . 2. Description of the Related Art As a conventional gas ejection processing apparatus (drying apparatus), there is the following one. As shown in FIG. 6, the apparatus includes a gas heating chamber 130 (gas storage chamber), a processing chamber 140,
It has a chamber 120. The gas heating chamber 130 forms a substantially closed space and has a burner 132. The air (gas) in the gas heating chamber 130 is heated to a high temperature by the burner 132. The processing chamber 140 forms a substantially closed space in which the work W (object to be processed) is moved by the conveyor 141 (the forward part 141a). The chamber 120 includes the gas heating chamber 130 and the processing chamber 14.
0 and form a substantially closed internal space. The chamber 120 has a gas inlet 122 and a nozzle 123. On the side of the chamber 120, a gap 1 for communicating the processing chamber 140 and the gas heating chamber 130 is provided.
21 are present. Then, the high-temperature air in the gas heating chamber 130 flows into the chamber 120 through the duct 134, and the high-temperature air in the chamber 120 flows from the gas ejection portion to the processing chamber 14
Spouts into 0. Thus, the workpiece W is dried by the high-temperature gas ejected from the gas ejection unit while being moved by the conveyor 141 in the processing chamber 140. [0004] In the above conventional apparatus,
The air ejected from the gas ejection portion and coming into contact with the work W is supplied to the work W and the conveyor 141 (the forward movement portion 1).
It flows along 41a) and returns to the gas heating chamber 130 via the gap 121. However, the work W
Further, the air flowing along the conveyor 141 prevents the air jetted from the gas jetting portion from directly contacting the work W. This is a bottleneck in improving the efficiency of drying (processing) the work W. Accordingly, an object of the present invention is to provide a gas ejection processing apparatus capable of improving the efficiency of processing an object to be processed. [0006] In order to solve the above-mentioned problems, the invention according to claim 1 forms a gas accommodating chamber forming a substantially closed space, and forms a substantially closed space. A processing chamber in which an object to be processed is moved by a conveyor, and a chamber disposed between the gas storage chamber and the processing chamber, wherein the chamber forms a substantially closed internal space; A gas inflow portion into which the gas in the gas storage chamber flows into the internal space, a gas ejection portion having a tubular shape projecting into the processing chamber, and blowing out the gas in the internal space into the processing chamber; and Is a gas ejection processing apparatus having a gas return path formed so as to penetrate the chamber in an isolated state, and returning the gas in the processing chamber to the gas storage chamber. [0007] In the "gas storage chamber", a gas at normal temperature is stored (when the gas inside is not subjected to a treatment such as heating or cooling), or a gas such as heating or cooling is applied to the gas inside. There is a case of “gas processing chamber” for processing. When a room-temperature gas is stored in the “gas storage room” and the room-temperature gas is ejected into the processing chamber, the object to be processed may be subjected to processing such as drying and cooling. When the gas is heated in the “gas processing chamber” and the heat-treated gas is ejected into the processing chamber, the object to be processed may be subjected to processing such as heating and drying. On the other hand, when the gas is cooled in the “gas processing chamber” and the cooled gas is ejected into the processing chamber,
Processing such as cooling can be performed on the object to be processed. In the gas ejection processing apparatus of the present invention,
Gas in the gas storage chamber flows into the chamber and is ejected from the chamber into the processing chamber. That is, the gas flows into the internal space of the chamber from the gas inflow portion and is ejected from the gas ejection portion. On the other hand, in the processing chamber, an object to be processed is moved by a conveyor. Then, the object to be processed is processed by the gas ejected from the chamber (gas ejection unit). The gas that has come into contact with and is reflected by the workpiece returns to the gas storage chamber through the gas return flow path of the chamber. Here, the gas return passage is formed so as to penetrate the chamber in a state of being isolated from the internal space of the chamber. Therefore, the gas is prevented from returning to the interior space of the chamber, and the generation of the flow of the gas flowing along the workpiece and the conveyor is reduced. For this reason, in the gas ejection processing apparatus of the present invention, the gas ejected from the gas ejection portion of the chamber easily comes into direct contact with the object to be processed, and the efficiency of processing the object to be processed is improved. Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, this drying device (gas ejection processing device) has a housing 10. The housing 10 forms a substantially closed space. A plurality of chambers 20 are provided in the housing 10, and a gas heating chamber 30 (gas storage chamber) and a processing chamber 40 are formed. A plurality of chambers 20 are provided inside the housing 10 at a position substantially at the center of the housing 10 along the length direction of the housing 10 (the traveling direction of the work W). Seal portions 21a are provided on both left and right portions of the chamber 20. In addition, a seal portion 21b is provided between adjacent chambers 20. Also, seal portions 21b are provided between the most upstream chamber 20 and the housing 10 (the inner wall surface) and between the most downstream chamber 20 and the housing 10 (the inner wall surface). Thus, the gas heating chamber 30 and the processing chamber 40 which form a substantially closed space are formed.
That is, the upper part of the housing 10 above the chamber 20 and the seal parts 21 a and 21 b is the gas heating chamber 30.
Similarly, the chamber 20 and the seal portions 21a, 21
The portion below b is the processing chamber 40. The gas heating chamber 30 is provided with a burner 32 corresponding to each chamber 20. The air in the gas heating chamber 30 is heated by the burner 32 to a high temperature. A duct 34 is provided in the gas heating chamber 30. The opening 34a at the upstream end of the duct 34 is
Is open in a direction perpendicular to the direction in which the hot air is injected from the burner 32. The downstream end of the duct 34 is connected to the chamber 20 (its gas inlet 22). A fan 36 is provided inside the duct 34, and air heated to a high temperature by the burner 32 is supplied to the duct 34.
Through to the chamber 20. As shown in FIG. 4, the chamber 20 has a substantially rectangular parallelepiped shape, and has a substantially closed internal space 28 formed therein. A gas inflow portion 22 is formed in an upper portion of the chamber 20, and a number of nozzles 23 (corresponding to a gas ejection portion) are provided on a lower surface of the chamber 20. Gas heating chamber 3
The air heated at 0 by the burner 32 flows into the chamber 20 (the internal space 28) from the gas inlet 22 through the duct 34, and is ejected downward from the nozzle 23 (toward the conveyor 41). . Further, the chamber 20 is formed with a plurality of gas return channels 24 penetrating the chamber 20 in the vertical direction. That is, the gas return flow path 24 is formed in a tubular shape so as to be isolated from the internal space 28 of the chamber 20, and establishes a communication state between the processing chamber 40 and the gas heating chamber 30. Thereby, the processing chamber 40
The air inside flows out into the gas heating chamber 30. As shown in FIG. 2, the processing chamber 40 has an inlet 44a and an outlet 44b. The entrance 44a,
Below the exit portion 44b, there are return route exit portions 45b,
A return path entrance portion 45a is formed. A conveyor 41 is provided in the processing chamber 40. The conveyor 41 has an endless shape in which a number of pipes extending in the width direction of the conveyor 41 are connected in the length direction of the conveyor 41. That is, the conveyor 41 has a forward part 41a of an upper part and a backward part 41b of a lower part, the forward part 41a extends from the inlet part 44a to the outlet part 44b, and the backward part 41b is connected to the return path entrance. From the part 45a to the return exit part 45b. As shown in FIG. 1 to FIG.
, An exhaust duct 50 is provided. Exhaust duct 5
0 extends above the chamber 20 along the length direction of the housing 10 (the traveling direction of the work). In the exhaust duct 50, an air inlet 51 is formed corresponding to each chamber 20. The downstream portion of the exhaust duct 50 is located outside the gas heating chamber 30 (the housing 10). The fan 5 is located downstream of the exhaust duct 50.
2 are provided so that air flows from the upstream side to the downstream side of the exhaust duct 50. As shown in FIG. 5, the side wall 11 of the housing 10 has a double structure of an outer wall 12 and an inner wall 13 as described below. The outer wall 12 is formed of an iron plate. The inner wall 13 is formed by a heat insulating material 13a and an iron plate 13b. Between the outer wall part 12 and the inner wall part 13, a hollow air layer forming part 14 is formed. An outer air inlet 16 is formed near the lower end of the outer wall 12 (corresponding to the processing chamber 40). On the other hand, an inner air inlet 17 is formed in a portion of the inner wall portion 13 corresponding to the gas heating chamber 30. That is, the outer air inlet 16 and the inner air inlet 17 are provided at positions that do not correspond to each other. Further, the inside of the gas heating chamber 30 (at least in the vicinity of the inner gas inlet 17) includes a fan 36 (see FIG. 1) and a fan 52 (see FIG. 2).
), The pressure is lower than that of the outside of the outer wall portion 12. For this reason, the air outside the outer wall 12 is
From the outer air inlet 16 into the air layer forming part 14,
The air flows along the side wall 11 in the air layer forming part 14 and flows into the gas heating chamber 30 from the inner air inlet 17. Next, the operation and effect of the drying device will be described. As shown in FIGS. 1 and 2, the conveyor 41 circulates in a state in which the workpiece W (the object to be processed) is placed on the reciprocating portion 41 a of the conveyor 41, and thereby the conveyor 41 is circulated.
The work W is moved by the (forward movement portion 41a).
That is, the work W enters the processing chamber 40 from the entrance 44a, moves in the processing chamber 40, and exits the processing chamber 40 from the exit 44b. At the same time, the air in the gas heating chamber 30 is heated by the burner 32, and the high-temperature air flows into the chamber 20 via the duct 34 by the fan 36, and is ejected from the nozzle 23 to the work W. The air comes into contact with the work W. Thereby, the work W is heated to a high temperature and dried. At the same time, the air is cooled to high humidity ("cooling" and "high humidity" are expressions by comparison with the state before contact with the work W). As shown in FIGS. 1 and 4, the air jetted and reflected on the work W returns to the gas heating chamber 30 through the gas return flow path 24. The flow of the air is promoted by the operation of the fan 52 (see FIG. 2) and the fan 36 of the exhaust duct 50. As described above, the high-temperature air flowing through the gas heating chamber 30 → the duct 34 → the chamber 20 → the nozzle 23 → the workpiece W passes through the gas return passage 24 and
Therefore, the generation of the flow of the air flowing along the conveyor 41 (the forward part 41a) is restricted. For this reason,
The high-temperature air jetted from the nozzle 23 to the work W easily comes into direct contact with the work W. Therefore, the processing (drying) of the work W is performed efficiently. A part of the air that has returned to the gas heating chamber 30 through the gas return passage 24 is, as shown in FIG.
2, the air is discharged from the exhaust duct 50 to the outside of the housing 10. In this manner, the air (part of which) is brought into high humidity in contact with the work W flows out of the exhaust duct 50 to the outside. For this reason, the air in the gas heating chamber 30 is prevented from becoming high in humidity, and low-humidity and high-temperature air is jetted to the work W, so that the work W can be dried efficiently. The pressure inside the gas heating chamber 30 (near the inside air inlet 17) becomes lower than that outside the housing 10 by the operation of the fan 36 and the fan 52 of the exhaust duct 50. Then, as shown in FIG.
The outside air flows from the outside air inlet 16 to the air layer forming section 14.
Into the housing 10 (the gas heating chamber 30) from the inside air inlet 17.
Flows into. As described above, since the air flow exists in the air layer forming section 14, the air is generated by the housing 1
Insulation between the inside and the outside of 0 is effectively insulated. Thereby, the outer wall 12 is maintained at a low temperature. Further, when the air flows through the air layer forming section 14, the temperature of the air gradually increases. For this reason, the temperature in the gas heating chamber 30 is prevented from suddenly dropping by the air flowing into the gas heating chamber 30 from the air layer forming unit 14. That is, the air layer forming unit 1
Gas heating chamber 30 (housing 10) directly without passing through 4
The temperature inside the gas heating chamber 30 can be reduced less than when the outside air flows into the gas heating chamber 30. Therefore, high thermal efficiency is maintained. The above is merely an embodiment of the present invention, and it goes without saying that the present invention can be implemented in various modified forms based on the knowledge of those skilled in the art. For example, the present invention is a heating device for heating a work,
The present invention can also be applied to a cooling device that cools a work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a drying apparatus (gas ejection processing apparatus) according to an embodiment of the present invention. It is a longitudinal cross-sectional view when it is cut by a virtual line in a direction perpendicular to the traveling direction of the workpiece. FIG. 2 is a longitudinal sectional view of a drying device (gas ejection processing device) according to an embodiment of the present invention. It is a longitudinal cross-sectional view at the time of cutting | disconnection by the virtual line of the moving direction of a to-be-processed object. FIG. 3 is a cross-sectional view of a drying apparatus (gas ejection processing apparatus) according to an embodiment of the present invention. FIG. 4 is a diagram illustrating a chamber taken out of a drying apparatus (gas ejection processing apparatus) according to an embodiment of the present invention.
(A) is a perspective view, (b) is a longitudinal sectional view. FIG. 5 is a partially enlarged view of FIG. 1; FIG. 6 is a longitudinal sectional view showing a conventional drying apparatus (gas ejection processing apparatus). [Description of Signs] 20 Chamber 22 Gas Inflow Portion 23 Nozzle (Gas Ejection Portion) 24 Gas Return Channel 28 Internal Space 30 Gas Heating Chamber (Gas Storage Chamber) 40 Processing Chamber

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Claims (1)

Claims: 1. A gas storage chamber that forms a substantially closed space, a processing chamber that forms a substantially closed space, and in which an object to be processed is moved by a conveyor, and the gas storage chamber. A chamber provided between the chamber and the processing chamber, wherein the chamber forms a substantially closed internal space, and a gas inflow portion through which gas in the gas storage chamber flows into the internal space. A gas ejecting portion that forms a tubular shape projecting into the processing chamber and that ejects gas in the internal space into the processing chamber; A gas return path for returning the gas into the gas storage chamber.