JPH0615215A - Coat drying unit - Google Patents

Abstract

PURPOSE:To adjust temperature easily by providing a blow adjuster which adjusts the air blow to be fed to a heated air generator by exhaling a part of the air to the outside, in a device which supplies air to the heated air generator and sends the generated hot air to a coat drying chamber. CONSTITUTION:A single-chamber-type coat drying device B is equipped with a drying/coat desiccation chamber 10 with an inlet/outlet through which an automobile as a body to be treated is allowed to pass and a duct 12 through which a heated air passes from a heated air generator 30, installed on the side wall of the chamber 10 in such a manner that the duct 12 encircles the chamber 10. In addition, the device B is equipped with a two-system suction device consisting of the first and the second aspirator 40, 50 for the chamber 10, and further, a unit for coating which is composed of the first aspirator 40 and a sender/supplier including an air feeder chamber 17, and a unit for drying which is composed of the heated air generator 30 and the second aspirator 50. A blow adjuster 54 which adjusts an air volume by exhaling a part of the blow generated by a circulation fan 53 to the outside is installed between the heated air generator 30 and the circulating fan 53, thus enabling an air temperature to be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating / drying apparatus used in a small-scale coating / drying apparatus for spray-painting a vehicle body and hot-air drying after painting in the same room in an automobile repair shop (so-called sheet metal coating factory). For units.

[0002]

2. Description of the Related Art Conventionally, as a one-chamber type coating / drying apparatus for spray-painting a vehicle body and drying after painting in a car repair factory (so-called sheet metal coating factory), for example, as shown in FIG. A one-chamber type coating / drying apparatus 1 in which C is a drying target is known (for example, Jikkai 55-94691).
(See Japanese Patent Publication).

In this system, an air outlet 5 is opened on the ceiling of the coating / drying chamber 2, a duct 4 communicating with the air outlet 5 is provided on the roof of the coating / drying chamber 2, and a duct 4 is provided on the side of the coating / drying chamber 2. A fan (not shown) for painting which blows the fresh air into the coating / drying chamber 2 from the air outlet 5 is provided, and the side of the coating / drying chamber 2 is timely provided. An air blower 8 for drying is provided which sends outside air into the duct 4 through the operating heated air generator 3 and blows heated air from the air outlet 5, and an exhaust port 6 is provided on the floor of the coating drying chamber 2. The exhaust port 6 is opened, and the exhaust port 6 is connected to an exhaust duct 7 that produces a suction flow by an exhaust fan (not shown).

By the way, in general, this type of device complies with the Organic Solvent Poisoning Prevention Regulations of the Industrial Safety and Health Law in order to create a good coating environment in consideration of the safety and hygiene of the coating operator at the time of spray coating described later. Designed based on Therefore, the air outlet 5 has an opening area of 0.6 times or more of the floor area (at least 26 square meters), and the wind velocity of the airflow from the air outlet is 0.2 meters per second or more over substantially the front surface of the floor. That is, the size of ducts, fans, exhaust fans, etc. should be relatively large so that the required air flow rate in the coating and drying room is at least 312 cubic meters per minute (26 m ² × 0.2 m / s × 60 s). It is set. Therefore, in the drying system, the air outlet 5 and the exhaust fan designed according to the coating conditions are used as they are, and therefore the blower 8 is also set to a size capable of sending an air volume corresponding thereto.

When spray coating is carried out in the coating drying chamber 1, fresh air is fed by a fan to blow it down from an outlet 5, and further exhausted from an exhaust port 6 by an exhaust fan to forcefully send it. The air is exhausted, and the scattered paint debris, which is generated over approximately half, is placed on the airflow and discharged. Further, when the coated car C is dried, the heated air generator 3 is operated so that the blower 8 blows the heated air from above the car C toward the same and exhausts it from the exhaust port 6. I have to.

Although it can be dried by a high-temperature heating element such as an infrared light bulb, at the time of coating, low-temperature ignition of the coating dust adhered and deposited occurs, or the solvent vapor easily collects and easily reaches the ignition point temperature. Because of the danger of explosion and fire, the hot air drying method is used. In the drying of such an automobile C, it is generally an optimum condition in terms of curing and productivity of the paint to raise the surface temperature of the vehicle body to around 60 ° C. and maintain the temperature for about 40 minutes to finish the drying. Therefore, the temperature of the heated air is 8
It is set to around 0 ° C to create the required conditions. If the surface temperature of the vehicle body is set to a high temperature of 80 ° C. or higher in order to cure the paint more quickly, there is a risk of damaging resin fittings and the like attached to various parts of the vehicle body, which is not preferable.

[0007]

In the conventional one-chamber type coating / drying apparatus 1 as described above, the temperature of the vehicle body side portion X such as the fender of the automobile C, the door and the step portion of the door rises when heated. 20-40 ° C compared to the upper surface Y of the vehicle body such as the roof, bonnet or trunk lid.
The temperature tends to be low, and therefore the side surface portion X becomes a dry state, or the dry state causes a large amount of dust to be attached, causing a so-called luster. There is a problem that the coating quality between X and the upper surface portion Y becomes non-uniform.

Further, if the side portion X is to be dried as much as possible, the drying time has to be extended, so that there is a problem in that the time is consumed and the productivity is impaired. In these, the side surface X of the vehicle body has a higher degree of polymerization of the iron plate per unit area than the upper surface Y of the vehicle body,
As a result, heat transfer is slow, and in this case, since heated air directly hits the vehicle body upper surface portion Y from the vertical direction, the temperature easily rises to a required temperature in this portion, but in the vehicle body side surface portion X. Is flowing in parallel along the side surface of the vehicle body and the temperature of the heated air is also lowered, so that the temperature rise becomes slow.

Further, generally, as a characteristic of spray coating, the coating rate of the coating is good because the upper surface portion has less drooping flow than the side surface portion, and a thick film is formed accordingly. In the drying system, an undesirably large amount of heated air is blown down from the ceiling because the outlet and exhaust fan designed according to the painting conditions are used, but in such a state, If the above-mentioned relatively large amount of heated air directly hits the upper surface part, the drying conditions of the surface and the inside will be different, the surface will be dried relatively quickly, and the evaporation of the solvent inside will be insufficient. So-called cracks, pinholes, craters, etc. are likely to be generated by the non-evaporated gas, which causes a problem that the coating film surface is roughened.

For this reason, if the flow rate and temperature of the blowout are reduced or the flow rate and temperature of the blowout are increased step by step so as not to generate these, and the drying is gradually performed, the drying of the side surface becomes more and more difficult. This is sufficient, and the above problems are likely to occur. In order to avoid these problems,
Hot air generator (B) for making the temperature of each part of the object to be coated uniform and drying as much as possible
When the exhaust cleaning device (C) is installed, since each device is incorporated in the ventilation passage, a relatively large paint drying equipment is formed, and the equipment cost is large for the paint drying chamber body (A). There was a problem that it became too much.

Therefore, an object of the present invention is to unitize a blower, a heated air generator, and the like, and to take them out of the ventilation passage to simplify the blower equipment so that the temperature of each part of the material to be dried can be controlled as much as possible. An object of the present invention is to provide a compact coating drying unit that can be made uniform and dried.

[0012]

The technical means of the present invention for solving such a problem is, as shown in the embodiment diagram of FIG. 1, as a unit for drying coating, heating air to raise the temperature. A heating air generator (30) for heating, a blower (53) for supplying air to the heating air generator (30) and also for supplying heating air to the coating drying chamber (10), and the heating air generator. The air conditioner (54) adjusts the air volume by escaping a part of the air sent to (30) to the outside.

As the coating drying unit,
On the suction side of the blower (53), the coating drying chamber (1
It is preferable that a circulation duct (51) for sucking the air of (0) and feeding it to the heated air generator (30) is connected. And again, this air conditioner (54)
15% of the amount of air blown from the blower (53)
It is desirable that it escapes.

Further, the coating drying unit includes a feeding device (20) for feeding the outside air to the coating drying chamber (10) and a suction device (for discharging the indoor air from the coating drying chamber (10) to the outside. 40) coating unit (N1)
And a heated air generator (3
0), the air is sent to the heated air generator (30) and the heated air is sent to the paint drying chamber (10), and the air is sent to the heated air generator (30). It is characterized by comprising a drying unit (N2) provided with an air conditioner (54) for escaping a part of air to the outside to adjust the air volume.

[0015]

When the coating drying unit is used to dry the article to be dried (C) while suctioning and exhausting air in the coating drying chamber (10), a blower (53) and a heated air generator (30). ) Is operated to heat the air heated by the heated air generator (30) and raise the temperature, and the air is adjusted by the air conditioner (54) to be supplied to the dried object (C).
The uniform air is blown to the air conditioner (54)
External air corresponding to the amount of air exhausted is introduced into the coating drying chamber (10). As a result, a compact paint drying unit that blows uniform heated air is realized.

According to this coating / drying unit, the air in the coating / drying chamber (10) is sucked into the blower (53) through the circulation duct (51) and the coating is performed through the heated air generator (30). By supplying heated air to the drying chamber (10), it is possible to circulate between the coating drying chamber (10) and the heated air generator (30), and the heating air is efficiently used for heating. To be able to minimize the consumption of fuel for use.

Further, according to this coating drying unit, by releasing about 15% of the amount of air blown from the blower (53) from the air blower (54), the air is blown into the coating drying chamber (10). A suitable amount of fresh air is introduced, and the heated air blown to the object to be dried (C) and the object to be dried (C)
Optimize the ratio with the temperature of the air that is blown to
The temperature of air blown to each part of the object to be dried (C) is appropriately adjusted to improve the drying efficiency.

According to this coating drying unit,
By operating the coating unit (N1), the feeding device (20) feeds the outside air to the coating drying chamber (10) and the suction device (40) moves the indoor air from the coating drying chamber (10) to the outside. The paint mist is discharged and the paint drying chamber (10) is ventilated to discharge the paint mist to the outside. In addition, by operating the drying unit (N2), a part of the air sent to the heated air generator (30) by the air conditioner (54) escapes to the outside to adjust the air volume and the blower ( 53)
Air is sent to the heated air generator (30) by the heating air generator, and the heated air generator (30) heats and raises the temperature of the air, and an appropriate amount of the heated air is heated to the coating drying chamber (10). Sent to.

[0019]

EXAMPLES The present invention will now be described in detail based on examples. In addition, this embodiment will be described with reference to the drawings by taking as an example the case of being applied to a one-chamber type coating and drying apparatus for automobiles. The basic configuration of the one-chamber coating / drying apparatus B shown in FIGS. 1 to 3 is as follows: the coating / drying chamber 10, the feeding device 20, the heated air generating device 30, the first suction device 40, and the second suction device. It consists of a dual-system suction device equipped with the device 50.

Further, the feeding device 20 is the first suction device 40.
And the heated air generator 30 is combined with the second suction device 50 to form a drying unit N2. The coating / drying chamber 10 is formed of an appropriate material, is provided with a window 11 through which the inside can be visually observed, and is formed as a simple building in which an automobile C as a material to be dried is put in and out through an entrance provided on one surface.

A duct 12 through which the heated air from the heated air generator 30 passes is arranged in the coating / drying chamber 10. The duct 12 is extended on the side wall of the coating / drying chamber 10 so as to surround the inside of the coating / drying chamber 10, and the outlet of the duct is set at a height where the door panel of the automobile C is located. Thirteen
Are a plurality of air outlets opened at the duct outlet of the duct 12 and open toward the center of the coating / drying chamber 10. When the automobile C is placed in the coating / drying chamber 10, the air outlet 13 is located on the side of the automobile C. 1
Reference numeral 4 is a slide door for adjusting the opening of the outlet 13.
Generally, the opening degree of the outlet 13 is set to be wide on the supply side of heating air and narrow on the end side in order to blow out a uniform amount of heated air from each outlet 13. Further, by appropriately adjusting the opening degree of each outlet 13 according to the shape of the automobile C, the amount of air blown to each portion of the automobile C as the material to be dried is made appropriate.

Reference numeral 15 denotes an upper opening provided in the ceiling of the coating / drying chamber 10, into which a filter 16 for fine dust is fitted. The roof portion is an air supply chamber box 17 that covers the upper opening 15. 18 is a coating drying room 1
It is a lower opening opened on the floor of 0, and a net-like floor plate 19 is fitted therein.

Feeding device 20 in coating unit N1
Is a duct 21 communicating with the air supply chamber box 17.
And a blower fan 2 for forcibly blowing the outside air from the outside opening 22 communicating with the outside air to the upper opening 15 through the duct 21.
3 and 3. Reference numeral 24 is an air supply filter fitted in the external opening 22. The first suction device 40 in the coating unit N1 functions as an exhaust device, and the lower opening 1
8 is provided with an exhaust duct 41, an exhaust fan 43 that sucks and exhausts the air in the coating drying chamber 10 through an exhaust tower 42 that communicates with the outside, and an air flow control valve 43a that also functions as a backflow prevention device. There is. Reference numeral 44 is a paint mist suction filter provided in front of the exhaust fan 43.

The heated air generator 30 in the drying unit N2 has a built-in gas burner for burning city gas or the like, and uses the air sent from the second suction device 50 as a heated air source. The second suction device 50 in the drying unit N2 sucks the air in the coating / drying chamber 10 and sends the air to the heating air generator 30 to circulate the air. The circulation duct 5 communicates with the lower opening 18.
1, a filter box 52 having a filter in communication therewith, a circulation fan 53 for blowing air in the coating drying chamber 10 to the heated air generator 30, and a heated air generator 30.
And a circulation fan 53, the air conditioner 54 is provided between the circulation fan 53 and the circulation fan 53 so that a part of the air from the circulation fan 53 escapes to the outside to adjust the air volume to the heated air generator 30.

In the case of the present embodiment, the amount of air escaped from the air conditioner 54 is such that 15% of the amount of air blown from the circulation fan 53 is released. Reference numeral 60 denotes a control device, which is equipped with a manual start switch, a timer for controlling the operating time, and the like, and also has the coating unit N1 or the drying unit N.
A selection switch for selectively driving 2 is provided.

Reference numeral 62 is an opening / closing door provided at the entrance / exit of the coating / drying chamber 10, and 63 is a fluorescent lamp for illumination provided on both sides of the ceiling. The upper opening of the device B, the blower fan,
The size of the exhaust fan, etc. is determined and designed based on the organic solvent poisoning prevention rule of the Industrial Safety and Health Law mentioned above.

When coating is performed using the one-chamber type coating / drying apparatus B thus constructed, as shown in FIG.
The vehicle C is installed in the approximate center of the coating / drying room 10, and the control unit 60 selects and drives the coating unit N1 to drive only the blower fan 23 of the feeding device 20 and the exhaust fan 43 of the first suction device 40. Drive it. In this case, the outside air is introduced through the upper opening 15 and the indoor air is exhausted through the lower opening 18, so that an air flow from the ceiling to the floor is generated. Therefore, the paint mist scattered inside the room at the time of coating is discharged to the outside of the room by riding on this air flow.

In this state, the heated air generator 30 is further added.
If it is operated, the coating can be performed while heating. Next, when the coated automobile C is dried, the controller 60 controls the drying unit N2.
Is selected and driven to operate the heated air generator 30 and the circulation fan 53 of the second suction device 50. Then,
As shown in FIGS. 2 and 3, the circulation fan 53 sucks air from the inside of the coating / drying chamber 10, and the duct 1
The heated air blows from the outlet 13 of 2 toward the side surface X of the automobile C.

Further, if the above suction amount is expressed as 100, the sucked air is discharged by 15% from the air conditioner 54, so the blowout amount from the blowout port 13 becomes 85, and therefore the suction amount ( Difference between 100) and the amount of blowout (85) (1
For 5), fresh air is supplied from the outside through the upper opening 15, and a flow of fresh air is generated from the upper opening 15 to the lower opening 18.

In this case, the heated air blown from the outlet 13 tends to rise upward because of its high temperature, but it partially goes downward due to the flow of fresh air from the ceiling to the floor. That is, the heated air from the air outlet 13 is distributed to the upward air and the downward air while hitting the side surface portion X, so that an air flow that vertically strikes the side surface portion X and an air stream that obliquely strikes the side surface portion X are generated. , Side part X
The heated air will hit evenly.

By the heated air hitting the side surface X,
The side surface X having a high degree of polymerization of the iron plate and slow heat transfer is rapidly heated, and the temperature rise is promoted. Further, since the heated air rising upward mixes with the fresh air, the temperature thereof is slightly lower than that of the heated air of the side surface portion X, but it is suppressed by the flow of the fresh air and becomes a relatively gentle air flow. It rises so as to enclose the portion Y, and the upper surface portion Y has a lower degree of polymerization of the iron plate than the side surface portion X, so that the upper surface portion Y is sufficiently heated.

FIG. 5 shows an example of a temperature-time curve obtained by measuring the rise of the surface temperature of each part of the vehicle body with the heated air blow rate and the fresh air blow rate set to 85:15. The measurement position (mounting position of the temperature sensor) is set to the position shown in FIG. 6, and the bonnet, roof, and trunk are appropriately located at three places on the upper surface, and the front fender, step, and rear fender are appropriately located at the side face X. Is.

As shown in the results of FIG. 5, the side surface portion X is kept at a temperature slightly higher than the upper surface portion Y and rises up to about 60 ° C. substantially uniformly with the upper surface portion Y, and the rising time is 20 as well.
The drying time after that is approximately the same as that of the upper surface portion Y. Therefore, the drying conditions of the upper surface portion Y and the side surface portion X become substantially the same, so that the coating film quality can be made uniform. Furthermore, the time required for drying is shortened. That is, in the past, the temperature of the side surface portion X was 20 to 40 ° C. lower even when the upper surface portion Y was 60 ° C., and the time required to complete the drying had to be lengthened accordingly. , Compared to this, a significant reduction can be achieved.

Therefore, as the time required until the end of drying is shortened, gas consumption is reduced and fuel consumption is reduced. Further, since the heating air generator 30 uses a part of the heating air in the coating / drying chamber 10 as a heating air source, it has high thermal efficiency. In this respect as well, the gas consumption is reduced and the fuel consumption is reduced. Is reduced. Further, since the heated air blown out is directed in the vertical direction, the collision on the side surface portion X is softened as compared with the case where the heated air is hit only vertically as is conventionally seen on the upper surface portion Y. Since the film is also relatively thin, generation of armpits, pinholes, craters, etc. is suppressed accordingly.

Further, in the upper surface portion Y as well, the heated air mixes with the fresh air and is pressed by the flow of the fresh air to become a relatively gentle air flow. However, the occurrence of armpits, pinholes, craters, etc. is suppressed accordingly. In particular, the ratio of heated air to fresh air is 85:15 as in this embodiment.
When set to, as can be seen from the measured values shown in FIG.
Since the temperature of the upper surface portion Y can be kept lower than that of the side surface portion X, the armpit caused by the above-mentioned thick coating film,
Generation of pinholes and craters is suppressed.

Furthermore, in the prior art, since a relatively large volume of heated air is blown down from a large opening in the ceiling, a turbulent air flow is generated in the coating drying chamber, dust is easily raised, and the amount of floating is large. However, there is a drawback that the adherence rate of dust to the coated surface is high by that amount, but according to the embodiment of the present invention, the amount of air blown down from the ceiling is reduced, and an appropriate amount of air is blown from the air outlet 15. Since the turbulent air flow is less likely to occur due to the blowing out, the dust is less likely to fly up, and the amount of floating of the dust is also reduced, so that the adhesion rate of dust to the coated surface is reduced, and the coating film quality is also improved in this respect.

In this way, each coating unit N1
Since the drying unit N2 and the drying unit N2 are independently unitized, they can be compactly integrated as equipment, and can be prevented from increasing in size by being placed outside the ventilation path, and the minimum required ducts 21, 41, 51, or 12 can be obtained. It can be sent to the coating / drying room 10 via the, and the facility cost can be reduced.

In another embodiment, the heated air source of the heated air generator 30 in the above embodiment is an outside air, and the second suction device 50 is not provided. In this case, at the time of drying, the system as shown in FIG. 7 or 8 may be used. In FIG. 7, the first suction device 40
And only the heated air generator 30 is driven, and the exhaust fan 43
I try to take in fresh air. According to this, although it is more disadvantageous than the above embodiment in terms of thermal efficiency, the operation is substantially the same as that of the above embodiment.

Further, in FIG. 8, only the heated air generator 30 is driven. According to this, the blown heated air rises upward due to its high temperature and is discharged from the upper opening 15, but this heated air strikes the side surface portion X while rising upwards and the upper surface portion Y Since the temperature rises so as to wrap around, the temperature rise of the side surface portion X is promoted, and the heated air is sufficiently distributed to the upper surface portion, so that both the upper surface portion Y and the side surface portion X can be heated to the required temperature substantially uniformly.

[0040]

As described above, when the coating drying unit of the present invention is used, when the intake / exhaust of the coating drying chamber (10) is performed when the object to be dried (C) is dried, the air conditioner is used. The air heated and heated by adjusting the air flow rate by (54) can be sent, and uniform heated air can be sent to the dried body (C) to be coated and by the air conditioner (54). The coating drying room (1
0), the air temperature can be easily adjusted, the drying conditions of each part of the object to be dried (C) can be made substantially uniform, and the coating quality can be improved. Further, it is possible to realize a coating drying unit which can shorten the drying time of the object to be dried (C) and can reduce the operating cost, and can be compactly unitized to reduce the facility cost.

Then, the air in the coating drying chamber (10) is sucked into the blower (53) through the circulation duct (51), and the heating air is supplied to the coating drying chamber (10) through the heating air generator (30). The coating drying chamber (10) and the heated air generator (30) can be fed.
Air can be circulated between and, and the heated air can be efficiently used, and the consumption of the heating fuel can be minimized.

Further, by allowing the blower (54) to escape about 15% of the blown air from the blower (53), an appropriate amount of fresh air can be supplied to the coating drying chamber (10). Air can be introduced, and the ratio of the heated air blown to the object to be dried (C) and the air whose temperature is lowered to the object to be dried (C) can be optimized. The temperature of the air blown to each part of the coating dried body (C) can be appropriately adjusted to improve the drying efficiency.

When this coating drying unit is used, the feeding unit (20) feeds the outside air to the coating drying chamber (10) and the suction unit (40) by operating the coating unit (N1). Can discharge indoor air from the coating drying chamber (10) to the outside and ventilate the coating drying chamber (10) to discharge the paint mist to the outside.
By operating the drying unit (N2), a part of the air sent to the heated air generator (30) by the air conditioner (54) can escape to the outside to adjust the air volume, and The blower (53) supplies air to the heated air generator (30), the heated air generator (30) heats and heats the air, and an appropriate amount of the heated and heated air is applied to the coating drying chamber ( It is possible to realize a coating / drying unit that can be sent to 10), is compact, has high operating efficiency, and has a low equipment cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a partially broken and partially disassembled structure of a one-chamber coating and drying apparatus according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of the one-chamber type coating and drying apparatus according to the embodiment, showing the operation during drying.

FIG. 3 is a vertical cross-sectional view of the one-chamber coating and drying apparatus according to the embodiment, showing the operation during drying.

FIG. 4 is a view corresponding to FIG. 3 showing an operation at the time of coating according to the embodiment.

FIG. 5 is a graph showing an example of a temperature rising state of each part of the automobile C at the time of drying according to the embodiment.

FIG. 6 is a side view of the automobile C showing the temperature rise measurement points according to the embodiment.

FIG. 7 is a vertical cross-sectional view showing another example of the one-chamber type coating and drying apparatus according to the embodiment, showing the operation when fresh air is taken in during drying.

FIG. 8 is a vertical cross-sectional view showing another example of the one-chamber type coating and drying apparatus according to the embodiment, showing the operation when fresh air is not taken in during drying.

FIG. 9 is a vertical cross-sectional view showing an example of a conventional one-chamber type coating and drying apparatus together with its operation.

[Explanation of symbols]

 B One-chamber type coating / drying device C Automotive (drying target) X Side part Y Top part 10 Coating / drying chamber 12 Duct 13 Air outlet 15 Upper opening 18 Lower opening 20 Feeding device 21 Duct (intake duct) 23 Blower fan 30 Heated air generator 40 First suction device 41 Exhaust duct 43 Exhaust fan 50 Second suction device 51 Circulation duct 53 Circulation fan 54 Air conditioner

Claims (4)

[Claims] 1. A heating air generator (30) for heating air to raise its temperature, and air is fed to the heating air generator (30) as well as to the coating drying chamber (10). Blower (5
3) and a blower (54) for escaping part of the air sent to the heated air generator (30) to the outside to adjust the air volume (54). . 2. A circulation duct (51) for sucking the air in the coating drying chamber (10) and feeding it to the heated air generator (30) is connected to the suction side of the blower (53). The coating drying unit according to claim 1. 3. The coating drying method according to claim 1, wherein about 15% of the amount of air blown from the blower (53) is released as the amount of air blown from the air conditioner (54). Unit. 4. A coating device comprising a feeding device (20) for feeding outside air to the coating drying chamber (10) and a suction device (40) for discharging indoor air from the coating drying chamber (10) to the outside. A unit (N1), a heated air generator (30) for heating air to raise the temperature,
An air blower (53) for sending air to the heated air generator (30) and also for sending heated air to the coating and drying chamber (10), and one of the air sent to the heated air generator (30) And a drying unit (N2) provided with a blower (54) for escaping a portion to the outside to adjust the air flow.