KR19990046789A - Painting &Baking Booth for Vehicles - Google Patents

Abstract

The present invention relates to a method for painting and drying a vehicle, and an apparatus thereof, wherein a circulation flow path is formed to recycle a part of the purified exhaust gas through an exhaust filter chamber to an air supply filter chamber during painting, and an air supply passage supplied to the painting drying chamber is provided. It is an automobile paint drying device equipped with a burner, a heat exchanger and an evaporator of a freezing device.

The present invention is configured as described above by heating the air supply by operating the burner during the painting operation of the winter season, or by cooling the air supply by operating the refrigeration device during the painting operation of the summer season, as well as providing a comfortable working environment and facilitates the pre-painting process Particularly, the part of the purified exhaust gas is recycled to the air supply filter chamber so that it is mixed with the fresh air sucked through the air supply duct and supplied to the paint drying chamber to minimize the energy required for heating and cooling the air supply. It is possible to minimize energy loss by recycling all of the purified exhaust gas through the exhaust filter chamber to the air supply filter chamber.

Description

Paint drying method and paint drying device for automobiles {Painting & Baking Booth for Vehicles}

The present invention relates to a paint drying method of a vehicle and a device thereof, and more particularly, a combustion and heat exchanger and heating means of a heat exchanger and a cooling device evaporator are provided in an air supply passage supplied to a paint drying chamber, according to seasons. The air supply can be heated or cooled, and the exhaust gas after the painting operation is purified to recycle some of the components, thereby increasing the energy efficiency required for heating and cooling the air supply. The present invention is also provided with an explosion-proof window of the paint drying chamber to recycle all of the purified exhaust gas so that the remaining thinner concentration in the exhaust gas does not exceed the lower explosion limit, thereby minimizing energy loss during the drying operation.

A conventional automobile paint drying method and a device thereof are introduced in Patent Publication 9701792, and FIGS. 4 and 5 illustrate the prior art, which will be described below with reference to the structure and operation of the conventional device.

First, referring to FIG. 4, the painting device 2a includes a damper a 211 configured to adjust the air inflow amount as necessary under the suction duct 21 for inducing the flow of external air, and at one end of the suction duct. A suction filter chamber 22 is configured to purify the contaminated air, and a filter 221 for filtering contaminants is formed in the suction filter chamber 22, and a worker enters and exits so that the filter 221 can be replaced on the side wall. A door 222 configured to be provided is provided, and a blower 231, a burner 232, and a heat exchanger are provided at a discharge part 23 connected to one side of the suction filter chamber 22, and a supply duct is formed thereon. 24 is configured and the paint and drying unit 25 is formed below the supply duct 24. The painting and drying unit 25 is configured with a distribution plate 251 having a hole 151a at the upper portion, and The grating 253 is configured.

In addition, an exhaust duct 26 configured to guide the flow of exhaust air is formed under the painting and drying unit 25, and an exhaust filter having a filter 271 that filters polluted air discharged at the side of the exhaust duct 26. A chamber 27 is configured, and a blower 281 for forcibly discharging air in the painting and drying chamber 25 is formed in the exhaust unit 28 configured at the outlet 272 of the exhaust filter chamber 27 and is disposed thereon. A damper b 282 is configured to adjust the amount of air discharged. In addition, a circulation duct 29 for inducing high temperature air flow in the painting chamber 252 is provided at the lower end of the painting and drying unit 25 and the side wall of the suction filter chamber, and includes a damper c 291.

Referring to the operation of the prior art configured as described above is as follows.

Referring to the flow of air in the process of painting the car first, while the worker paints the car 20 worn as shown in Figure 4 while the blower (231, 281) is operating while the inflow of outdoor air is made, The flow of air enters through the suction duct 21 and passes through the fully open damper a 211 and passes through the filter 221 of the suction filter chamber 22, whereby the contaminated air is purified and the purified air is discharged. The blower 231 of the part 23 continues to spread evenly while reaching the distribution plate 251 through the supply duct 24, and the air discharged into the painting and drying chamber 25 through the hole 251a is supplied by the operator. The paint particles are filtered through the exhaust duct 26 and the filter 271 of the exhaust filter chamber 27 through the exhaust duct 26 together with the paint particles generated during painting, and the purified air is supplied to the blower 281. Damper b fully open by Is emitted to the outside through).

At this time, since the air entering the paint chamber by the blowers 231 and 281 is not heated air, there is almost no need to recycle such air.

On the other hand, when the painting operation is completed, the drying operation is performed, as shown in Figure 5, the damper a (211) configured in the suction duct 21 is partially closed, so that less air flows into the suction filter chamber 22 and the discharge unit 23. After entering the paint and drying chamber 25 through the supply duct 24 and drying the surface of the paint chamber vehicle 20, some hot air is the exhaust duct 26 and partially opened with the exhaust filter chamber 27. The high temperature air in the paint and drying chamber 25 is discharged to the outside through the damper b 282 of the exhaust part 28 and passes through the damper c 291 which is completely opened through the circulation duct 29. 22), the amount of air circulated can be properly adjusted.

In the conventional paint drying apparatus described above, the problem is that it does not have a configuration in consideration of the working environment and the pre-painting process of the vehicle during the painting work in winter and summer. In other words, since all of the externally supplied air is discharged, the air temperature does not increase sufficiently even when heating the air supply for winter work, and there is an uneconomical problem that discards all the energy used for heating the air supply. It does not provide a comfortable working environment because it does not have a cooling function.As the surface temperature of the car body, which is put into the paint drying device, is excessively initially, the paint surface is rapidly evaporated, so the solvents such as thinners evaporate rapidly. There was a problem in the paint quality. In addition, although some of the exhaust gas is recycled to the intake filter chamber 22 in order to save energy required for drying air during the drying operation, the energy contained in the exhaust gas exhausted through the exhaust duct 26 except for the amount that is still recycled. There was a problem that can not be recovered.

An object of the present invention was devised to improve the problems of the prior art as described above, which allows heating and cooling of the air supply, especially during winter and summer painting, while recycling part of the energy consumed for heating and cooling. It is possible to, and to recycle most of the energy consumed during the drying operation to provide a high-efficiency paint drying method and paint drying apparatus for automobiles.

The present invention provides a painting and drying apparatus for a vehicle composed of a paint drying chamber, a suction filter chamber, a combustion / heat exchange chamber, and an exhaust filter chamber so as to realize the above object, and includes a separate refrigeration unit and includes the air supply filter chamber and the combustion / heat exchange chamber. The evaporator of the refrigerating device is configured in the suction filter duct to be connected, and an explosion prevention window is formed in the ceiling of the recirculation duct and the paint drying chamber between the exhaust filter chamber and the air supply filter chamber.

Hereinafter, the detailed features of the present invention will be understood by describing the paint drying method and the paint drying apparatus for automobiles according to the present invention in more detail.

1 is a schematic configuration diagram showing a paint drying apparatus according to the present invention;

Figure 2 is a schematic operation diagram when painting the vehicle in the paint drying apparatus according to the present invention

Figure 3 is a schematic operation diagram when the vehicle drying in the paint drying apparatus according to the present invention

Figure 4 is a schematic operation diagram when painting a vehicle in a conventional paint drying apparatus

Figure 5 is a schematic operation diagram when the vehicle drying in the conventional paint drying apparatus

* Explanation of symbols for the main parts of the drawings

1. Paint drying chamber 2. Suction filter chamber 3. Combustion / heat exchange chamber 4. Exhaust filter chamber

5. Suction duct 6. Suction filter duct 7. Supply duct 8. Exhaust duct

9. Recirculation duct 10. Refrigeration unit 11. Ceiling filter 12. Grating

21. Dust collection filter 31. Air supply blower 32. Combustion heat exchanger 33. Burner

41. Exhaust filter 42. Exhaust blower 51. Suction damper 81. Exhaust damper

91. Recirculation damper 101. Evaporator

1 shows a schematic configuration diagram of a paint drying method and a paint drying apparatus for an automobile according to the present invention, wherein the paint drying chamber 1, the suction filter chamber 2, the combustion heat exchange chamber 3, the exhaust filter chamber 4 and It consists of a refrigeration apparatus (10).

A suction duct 5 into which the outside air is introduced at one upper end of the suction filter chamber 2 and a suction damper 51 at the lower end thereof are formed, and the suction filter chamber 2 is disposed at the dust collecting filter 22 and the side wall. The door 23 is configured to allow worker access. The suction filter duct 6 and the evaporator 101 of the refrigerating device 10 are formed at the other side of the suction filter chamber 2, and the suction filter duct 6 is burned. A combustion air heat exchanger 32 integrally formed at an upper end thereof with an air supply blower 31 for discharging the sucked air, and a combustion chamber of the combustion heat exchanger 32. Burner 33 is connected to one side. An air supply duct 7 is formed at one upper end of the combustion and heat exchange chamber 3, and is connected to the painting drying chamber 1, and the ceiling filter 11 is disposed below the air supply duct 7 in the upper portion of the painting drying chamber 1. And the grating 12 at the bottom bottom.

The lower side of the bottom of the lower part of the paint drying chamber 1 forms a space in which exhaust is induced, and a lower end of the exhaust filter chamber 4 is connected to one side thereof, and a dust collecting filter and an activated carbon filter are combined inside the exhaust filter chamber 4. An exhaust filter 41 is configured. The outlet of the exhaust filter chamber 4 is connected to the exhaust blower 42, the upper portion of which consists of an exhaust damper 81 and an exhaust duct 8, and one side of the exhaust filter chamber 4 is a recirculation duct 9. And a recirculation damper 91 are connected to the suction filter chamber 6.

On the other hand, as another method of installing the evaporator 101 of the refrigerating device 10 may be installed in the air supply duct (7) connected to the upper end of the combustion and heat exchange chamber (3).

Referring to the operation of the present invention configured as described above are as follows. Referring to Figure 2 describes the flow of air during the painting operation of the car received in the paint drying chamber (1), to the suction damper 51 partially opened to a predetermined degree by the operation of the air supply blower 31 and the exhaust blower 42 Accordingly, the outside air is introduced through the intake duct 5, and a part of the air purified from the exhaust filter chamber 4 is introduced through the recirculation duct 9 according to the recirculation damper 91 partially opened to a predetermined degree. In the suction filter chamber 2 is mixed with the outside air. The mixed air passes through the dust collecting filter 22 of the suction filter chamber 2 to filter contaminants in the air, and the purified air is supplied to the combustion / heat exchange chamber 3 through the suction filter duct 6. It is sent out to the paint drying chamber 1 through the air supply duct 7 by the blower 31, and during the winter, the combustion / heat exchanger 32 and the burner 33 provided in the combustion / heat exchange chamber 3 are provided. The evaporator 101 of the refrigerating device 10 provided in the suction filter duct 6 is operated to cool the air supply during the summer operation. The purified air sent to the painting drying chamber 1 is further purified while passing through the ceiling filter 11 configured under the air supply duct 7, and at the same time, the flow is evenly spread throughout the ceiling, and the interior of the painting drying chamber 1 is downward. As the uniform flow is formed, it is guided to the lower side of the grating 12 together with the surplus paint particles scattered without being attached to the surface of the vehicle during the painting operation, and flows into the exhaust filter chamber 4 connected to the bottom of the painting drying chamber 1 to exhaust. The paint particles are filtered while passing through the filter 41, and the thinner vapor mixed with the paint is purified by being adsorbed on the activated carbon layer. Part of the purified exhaust gas is discharged to the outside through the exhaust damper 81 and the exhaust duct 8, which are partially opened to a predetermined degree by the exhaust blower 42, and the remaining air is recycled damper connected to one side of the exhaust filter chamber 4 Through 91 and the recirculation duct 9, it is recycled to the suction filter chamber 2 as previously described. In this case, in case of winter and summer, if not only the pleasant working environment is required but also the heating and cooling of the air supply is required to suit the painting conditions of the vehicle, the exhaust air that has already been heated or cooled together with the fresh air coming from outside is purified. After recycling, the mixture is used to minimize the energy required for heating and cooling the air supply.

Meanwhile, in the drying operation after the painting operation, the suction damper 51 and the exhaust damper 81 are completely closed, and the recirculation damper 91 is completely opened to recycle the entire amount of air introduced into the painting drying chamber 1. That is, the hot air introduced in the total amount through the recirculation damper 91 and the recirculation duct 9 completely opened in the exhaust filter chamber 4 passes through the dust collecting filter 22 of the suction filter chamber 2 and the suction filter. It is further heated by the temperature set by the combustion heat exchanger 32 and the burner 33 which are operated when the gas flows into the combustion heat exchange chamber 3 through the duct 6 and is sent to the air supply blower 31. Through the air supply duct (7) flows into the paint drying chamber (1) to dry the painted car and circulates through the exhaust filter chamber (4) to the recirculation duct (9). This circulation of air minimizes the energy required to heat the drying air to the set temperature, and the explosion installed on the ceiling of the paint drying chamber (1) to maintain the concentration of thinner vapor generated from the paint film being dried below the lower explosion limit. The prevention window 13 is opened to replace 2 to 3% of the air circulated by natural convection.

As described above, the paint drying method and the paint drying apparatus for an automobile according to the present invention include an exhaust recirculation flow path between the exhaust flow path and the suction flow path, and constitute an evaporator and a combustion / heat exchanger of the refrigerating device between the supply flow path to the paint drying chamber. Especially in winter, the air supply to the paint drying room is heated to around 20 ° C, providing a comfortable working environment for the worker, and heating the excessively cooled car surface to facilitate the pre-painting process and after purifying part of the exhaust. By recirculating and recycling with fresh air, the energy required to heat the air supply can be greatly saved.

In addition, in summer, the supply air to the paint drying room can be cooled down to about 28 ℃, providing a pleasant working environment and lowering the surface temperature of the car that is overheated outdoors. It is possible to solve the problem of paint quality such as pinhole, and also, it is possible to greatly reduce the energy required to cool the air supply by recycling part of the exhaust and recycling it with fresh air.

In the drying operation, the exhaust damper and the suction damper are completely closed and the recirculation damper is completely opened to recirculate all the air used for drying. Therefore, the energy required to heat the drying air to about 80 ° C is only the amount of heat lost in the circulation process. The energy loss is minimized by replenishing only as much as possible. At this time, about 2-3% of the recirculated exhaust is replaced with fresh air by natural convection by opening the explosion-proof window provided in the ceiling of the paint drying chamber. The concentration of thinner vapor can be controlled below the lower explosion limit.

In addition, since the ceiling filter is additionally installed in the paint drying chamber to double the purification of the air supply supplied to the paint drying room, the cleanliness of the air supply can be increased, and the fall of the fine dust that causes the most paint quality problems can be prevented.

Claims (3)

In the painting and drying apparatus for automobiles, which comprises a painting drying chamber (1), a suction filter chamber (2), a combustion / heat exchange chamber (3), an exhaust filter chamber (4), etc. for painting and drying an automobile, A suction duct 5 for inducing external air at one upper end of the suction filter chamber 2 and a suction damper 51 at a lower end thereof are formed, and a dust collecting filter 22 and an entrance door are formed in the suction filter chamber 2. 23, a suction filter duct 6 is formed at the other side of the suction filter chamber 2, connected to the combustion / heat exchange chamber 3, and sucked in the combustion / heat exchange chamber 3. The air supply blower 31 for discharging the air, an integrated combustion / heat exchanger 32 including a burner at an upper end thereof, and an air supply duct 7 formed at an upper end side of the combustion heat exchange chamber 3 to form a paint drying chamber. Connected to (1), the explosion-proof window for discharging a part of the circulating air by natural convection during the drying operation on the ceiling filter 11 and the lower side of the air supply duct (7) in the upper part of the paint drying chamber (1) 13, a grating 12 is formed at the bottom of the lower part, and a space through which exhaust is induced is formed at one side thereof, and one side thereof is provided at the lower end of the exhaust filter chamber 4; An exhaust filter 41 having a dust collecting filter and an activated carbon filter combined therein and an outlet of the exhaust filter chamber 4 having an exhaust blower 42, an exhaust damper 81, and an outlet of the exhaust filter chamber 4. Connected to the exhaust duct (8), one side of the exhaust filter chamber (4) is characterized in that the recirculation duct (9) and the recirculation damper (91) is configured to be connected to the suction filter chamber (6) Device. The method of driving a paint and drying apparatus for a vehicle according to claim 1, wherein a part of the suction damper 51, the exhaust damper 81, and the recirculation damper 91 is opened to a predetermined degree during the painting operation. A part of the exhaust gas discharged from 1) and purified in the exhaust filter chamber 4 is discharged through the exhaust damper 81 and the exhaust duct 8, and the remaining exhaust gas is discharged through the recycle damper 91 and the recycling duct 9. It is recycled to the suction filter chamber (2) and mixed with fresh air introduced from the suction duct (5) and supplied again to the painting and drying chamber (1). During the supply process, a refrigeration apparatus provided in the suction filter duct (6) The air is cooled by the evaporator 101 of 10), or in the winter, the air is heated by the combustion / heat exchanger 32 installed in the combustion / heat exchange chamber 3, and the exhaust damper 81 and Close the suction damper 51 completely and recycle The damper 91 is completely opened, and the air necessary for drying is recycled, and the air is burned by the temperature set in the drying operation.Then, the air is heated by the heat exchanger 32. In order to lower the paint drying chamber (1) by opening the explosion-proof window (13) provided on the ceiling, the painting and drying method for the automobile, characterized in that to replace 2 to 3% of the amount of recycled air by natural convection. 2. The painting and drying apparatus for an automobile according to claim 1, which is installed in the air supply duct (7) as another method of installing the evaporator (101) of the refrigerating device (10).