JP4575690B2 - Positive pressure management system for painting room and positive pressure management method for painting room using the same - Google Patents

Description

  The present invention relates to a positive pressure management system for a painting chamber and a positive pressure management method for a painting chamber using the same, and more specifically, the amount of air supplied to the painting chamber can be adjusted according to fluctuations in the positive pressure in the painting chamber. The present invention relates to a coating chamber positive pressure management system and a coating chamber positive pressure management method using the system.

  In general, the painting room where the workpiece is painted is a clean room in order to prevent poor painting due to dust, etc. Therefore, in order to prevent contamination of the painting room, the painting room Must be maintained at a positive pressure.

  On the other hand, if the degree of positive pressure in the paint chamber is increased, paint mist harmful to the human body will be released from the paint chamber. Things have been done.

  By the way, in the painting chamber, an exhaust fan is generally provided at the back of the painting booth for the purpose of collecting paint mist harmful to the human body. This allows air to flow toward the painting booth. While the paint mist is collected by the filter, the indoor air is exhausted to the outside of the room, and at the same time, the air is supplied into the painting chamber.

  Therefore, when the exhaust fan is clogged, the balance between the supply air and the exhaust is lost, and the positive pressure in the coating chamber fluctuates.

  Therefore, conventionally, an exhaust port is provided in the wall of the painting chamber, and a positive pressure damper is provided at the exhaust port. When the degree of positive pressure in the coating chamber exceeds the allowable range, the positive pressure damper is activated and the coating chamber is operated. A predetermined amount of air is exhausted from the outside to the outside, thereby maintaining the degree of positive pressure.

  That is, in FIG. 4, 31 is a general positive pressure management system, and 32 is a coating chamber in the figure. In the painting chamber 32, a painting booth 33 for painting a workpiece is arranged. Although not shown, a painting robot or the like is arranged in the painting booth 33.

  In addition, a paint mist collection filter (not shown) is provided on the rear side of the painting booth 33, and an exhaust means 34 having an exhaust fan 35 is provided to operate the exhaust fan 35. Thus, the air in the painting chamber 32 flows toward the painting booth 33 and is exhausted while collecting the paint mist.

  On the other hand, the painting chamber 32 is provided with an air supply port 3202, and an air supply pipe 36 having the other end connected to the air supply means 3701 in the air supply device 37 is connected to the air supply port 3202. As a result, almost the same amount of air exhausted from the exhaust means 35 can be supplied into the coating chamber 32 from the air supply device 37.

  Further, the conventional painting chamber 32 is provided with an exhaust port 3201 and a positive pressure damper 38 that can open and close the exhaust port 3201, and the degree of positive pressure in the coating chamber 32 exceeds an allowable amount. In this case, the positive pressure damper 38 is actuated to exhaust the air in the painting chamber 32 to the outside of the chamber, whereby the degree of positive pressure in the painting chamber 32 can be kept constant.

  In the figure, reference numeral 3702 denotes heat exchange means provided in the air supply device 37, and reference numeral 3703 denotes a filter for removing dust and the like contained in the outside air.

  However, since the positive pressure damper conventionally used in the painting chamber does not operate when the pressure is less than 1 Pascal, the above-mentioned positive pressure management system maintains the positive pressure in the painting chamber accurately. Is difficult.

  In addition, the fine pressure sensor has a problem that the positive pressure is in the range of −5 to 5 Pascals and is not stable due to pulsation and is difficult to measure. In particular, there is a problem that when the positive pressure is near zero pascal, there is a drift of the sensor itself, and it is difficult to determine whether the pressure is positive or negative.

  Therefore, the present invention implements a positive pressure management method for a painting chamber that makes it possible to optimally maintain the positive pressure in response to the fluctuation even when the degree of the positive pressure in the coating chamber slightly varies. The objective is to provide a positive pressure management system for the painting room.

The positive pressure management system of the present invention includes a painting chamber, a painting booth continuously arranged in the painting chamber, and an exhaust means for discharging air in the painting chamber, which is arranged continuously in the painting booth, An air supply device for supplying air into the coating chamber, one end communicating with the coating chamber, an air supply pipe connected to the air supply device at the other end, and an exhaust port formed in the coating chamber A positive pressure damper that can be opened and closed, a second exhaust port formed in the coating chamber, a rotary encoder disposed in the coating chamber in an arrangement that closes the second exhaust port, and a shaft of the rotary encoder. A positive pressure sensor composed of a wing and a control circuit connected to the positive pressure sensor and connected to the air supply device . Feather rotation direction The output signal from the A phase or B-phase, by the output signal of the rotational speed of the blades from the B phase or phase A, while detecting the degree of coating chamber of positive pressure, in accordance with the rotation of the blades, the control The air supply device can be controlled by a circuit.

Further, the positive pressure management method for a painting chamber according to the present invention is for discharging the air in the painting chamber, the painting booth continuously arranged in the painting chamber, and the coating chamber continuously arranged in the painting booth. An exhaust means, an air supply device for supplying air into the coating chamber, one end of which communicates with the coating chamber, the other end of which is connected to the air supply device, and the coating chamber. A positive pressure damper capable of opening and closing the formed exhaust port, while supplying air to the coating chamber by the air supply device while discharging the air in the coating chamber by the exhaust means, In the positive pressure management method of the painting chamber, in which the desired amount of air can be discharged from the exhaust port by operating the positive pressure damper when the set degree is exceeded,
A second exhaust port is formed in the coating chamber and the second exhaust port is closed, and the coating chamber has a positive encoder composed of a rotary encoder and a wing attached to the shaft of the rotary encoder. A pressure sensor is arranged, and the air supply device is connected to the positive pressure sensor via a control circuit, receives the rotation of the wing, and outputs the rotation direction of the wing from the A phase or the B phase from a rotary encoder. Signal, and the rotation speed of the wing is an output signal from the B phase or A phase, so that the degree of positive pressure in the painting chamber is detected and the air supply device is controlled by the control circuit according to the rotation of the wing. It is characterized by doing.

  In the present invention, a positive pressure sensor is disposed in the coating chamber, and this positive pressure sensor is connected to an air supply device via a control circuit, thereby driving the air supply means according to the degree of positive pressure in the coating chamber. Can be controlled.

  For this reason, unlike conventional methods in which the positive pressure in the coating chamber is simply managed using a positive pressure damper, it is possible to respond to fluctuations in fine pressure, and the positive pressure in the coating chamber is always maintained optimally. can do.

  The positive pressure management system for a painting room of the present invention comprises a painting room and a painting booth arranged continuously in the painting room, and an exhaust means for exhausting air in the painting room to the rear side of the painting booth. The air in the painting chamber can be exhausted by operating the exhaust means.

  In addition, one end of an air supply pipe communicates with the painting chamber, and an air supply device is connected to the other end of the air supply pipe, and air can be supplied into the painting chamber by operating the air supply device. .

  In addition, the paint chamber has an exhaust port and a positive pressure damper that can open and close the exhaust port. When the positive pressure level in the paint chamber exceeds a certain value, the positive pressure damper opens. Thus, the air in the coating chamber is exhausted through the exhaust port.

Furthermore, a second exhaust port is formed in the painting chamber, and the second exhaust port is closed. The painting chamber is composed of a rotary encoder and a wing attached to the shaft of the rotary encoder. A positive pressure sensor is arranged, a control circuit is connected to the positive pressure sensor, and the air supply device is further connected to the control circuit, so that the control is performed according to the output of the positive pressure sensor. The air supply device can be controlled by a circuit.

  And in the positive pressure management method using the positive pressure management system of the painting chamber of the present invention having such a configuration, the air is supplied into the coating chamber by the air supply device while discharging the air in the coating chamber by the exhaust means, When the degree of positive pressure in the painting chamber exceeds a preset degree, the positive pressure damper is operated to discharge a desired amount of air from the exhaust port, and the air supply is performed according to a signal from the positive pressure sensor. By controlling the drive of the device, the degree of positive pressure in the painting chamber can be maintained optimally.

  Examples of a coating chamber positive pressure management system (hereinafter simply referred to as “positive pressure management system”) and a coating chamber positive pressure management method (hereinafter simply referred to as “positive pressure management method”) using the same according to the present invention. Referring to the drawings, FIG. 1 is a diagram showing the entire positive pressure management system 1 of the present embodiment, in which 2 is a coating chamber.

  In the drawing, 3 is a painting booth, and this painting booth 3 is connected to the painting chamber 2 or is suitably provided in the painting chamber 2 and is not shown in the drawing, Various devices necessary for painting workpieces such as painting robots are provided.

  Next, an exhaust means is provided on the rear side of the painting booth 3. That is, in the figure, reference numeral 4 is an exhaust means, and this exhaust means 4 has a filter (not shown) capable of collecting paint mist and the like. It is equipped with an exhaust fan 5, and by operating the exhaust fan 5, the air in the painting chamber 2 is exhausted while flowing to the rear side of the painting booth 3, and at that time, paint mist and the like are collected. It is possible.

  On the other hand, in the present embodiment, two air supply ports 203 are formed on the ceiling side of the coating chamber 2, and one end of the air supply pipe 8 communicates with the air supply port 203. The other end of the air supply pipe 8 is connected to an air supply fan 10 provided in the air supply device 9. By driving the air supply fan 10, the paint chamber 2 is connected via the air supply pipe 8. Air can be supplied inside.

  In addition, the painting chamber 2 is provided with an exhaust port 202, and the positive pressure damper 7 is provided so as to close the exhaust port 202. The degree of positive pressure in the painting chamber 2 is an allowable amount. In this case, the positive pressure damper 7 is opened when the pressure exceeds the range, and thereby the exhaust is exhausted from the inside of the painting chamber 2 to the outside.

  In the present embodiment, as the positive pressure damper 7, a positive pressure damper that has been conventionally used for the positive pressure management of the coating chamber is used, that is, provided with a weight having an arbitrary weight, usually The exhaust port 202 is closed by the weight of the weight, and is moved when a pressure higher than a predetermined value is applied, thereby releasing the closure of the exhaust port 202. However, the structure and the like are not particularly limited, and the painting chamber 2 Any positive pressure damper may be used as long as it can open and close the exhaust port 202 according to the degree of positive pressure inside.

  Next, in the figure, 201 is a second exhaust port, that is, in the present embodiment, the second exhaust port 201 is formed in the coating chamber 2 and the second exhaust port 201 is closed. A positive pressure sensor 6 is provided.

  Here, the positive pressure sensor 6 will be described. In this embodiment, as shown in FIG. 2, a wing 602 used for a fan or the like is provided on the shaft of a rotary encoder 601 used for driving a robot or the like. The positive pressure sensor 6 is thus installed. With this configuration, the rotary encoder 601 receives the rotation of the wing 602, the rotation direction of the wing 602 is set as an output signal from the A phase or the B phase, and the rotation speed of the wing 602 is output from the B phase or the A phase. A signal is used to detect the degree of positive pressure in the coating chamber 2.

On the other hand, the air supply device 9 is provided with an inverter circuit 11 connected to an air supply fan 10, and the output of the positive pressure sensor 6 is connected to the inverter circuit 11, thereby supplying air according to the rotation of the wing 602. The drive of the air fan 10 can be controlled.

  Here, FIG. 2 is a block diagram showing the relationship between the positive pressure sensor 6, the inverter circuit 11, and the air supply fan 10. In FIG. 2, when the blade 602 rotates, the rotation direction and number of rotations of the rotary encoder 601 are changed. Are output to the inverter circuit 11 from the A phase and the B phase, and the inverter circuit 11 receives this signal and can control the driving of the air supply fan 10.

  That is, when the inside of the painting chamber 2 is positive pressure, the wing 602 rotates in the exhaust direction. On the other hand, when the inside of the coating chamber 2 is negative pressure, the wing 602 rotates in the air supply direction. It is possible to know whether the inside of the coating chamber 2 is positive pressure or negative pressure by the output of. At that time, it is possible to know the degree of positive pressure or the degree of negative pressure by detecting the rotation speed of the wing 602. For this reason, in this embodiment in which the output from the positive pressure sensor 6 is connected to the inverter circuit 11 and the drive of the air supply fan 10 can be controlled by the inverter circuit 11, the degree of positive pressure in the painting chamber 2 is determined. Even when it slightly changes, it is possible to control the driving of the air supply fan 10 according to the degree of positive pressure in the painting chamber 2, so that the degree of positive pressure in the painting chamber 2 can always be kept constant. . Further, in the positive pressure sensor 6 of this embodiment in which the wing 602 is attached to the rotary encoder 601, it is possible to accurately determine the positive pressure and the negative pressure based on the rotation direction and the rotation speed of the wing 602.

  As described above, the rotary encoder used as the positive pressure sensor is conventionally known as an angle detector, and is widely used in FA and OA equipment such as NC machine tools, machining centers, and industrial robots. Therefore, detailed description is omitted.

  Although not shown, in the present embodiment, an arithmetic processing unit is interposed between the positive pressure sensor 6 and the inverter circuit 11, whereby an air supply fan based on a signal from the positive pressure sensor 6. 10 inverter controls are possible.

  The operation of the positive pressure management system of the present embodiment configured as described above will be described with reference to the flowchart of FIG. 3. When positive pressure management in the coating chamber is performed in this embodiment, first, the initial step 1 is performed. As a setting, the rotational speed of the air supply fan 10 according to the rotational direction and rotational speed of the wing 602 necessary for optimizing the degree of positive pressure in the painting chamber 2 is set in the inverter circuit 11. Thereby, the air supply fan 10 can be controlled by the inverter according to the rotation direction and the rotation speed of the wing 602.

  Next, when the positive pressure management starts, in step 2, the supply of air into the painting chamber 2 by driving of the supply fan 10 and the exhaust of the coating chamber 2 by driving of the exhaust fan 5 are started. The positive pressure is monitored by the positive pressure sensor 6.

  When the positive pressure in the painting chamber 2 fluctuates, that is, the wing 602 rotates in the air supply direction (in the case of negative pressure), or exceeds the predetermined allowable range in the exhaust direction. In the case of rotation, the inverter circuit 11 is controlled with respect to the air supply fan 10 in step 4, whereby the air supply fan 10 is controlled to rotate so that the positive pressure level in the painting chamber 2 is optimized. Is done.

  That is, when the wing 602 of the positive pressure sensor 6 rotates and, accordingly, the A-phase and B-phase signals are output from the rotary encoder 601 constituting the positive pressure sensor 6, the wing 602 is first supplied to the supply side. Since the inside of the coating chamber 2 is at a negative pressure, the rotation speed of the air supply fan 10 is increased by the control of the inverter circuit 11 to increase the air supply.

  On the other hand, when the wing 602 rotates to the exhaust side and the air volume exceeds a preset value, the degree of positive pressure in the painting chamber 2 is too large, so that the supply of air is controlled by the control of the inverter circuit 11. The rotational speed of the air fan 10 is decreased to reduce the air supply amount.

  In parallel with this, when the degree of positive pressure in the painting chamber 2 changes greatly, in step 5, the positive pressure damper 7 is operated to exhaust air from the exhaust port 202, which also causes the painting chamber. Management of the positive pressure in 2 is attempted.

  Then, after the painting operation is finished and the positive pressure management in the painting chamber 2 is no longer necessary, the positive pressure management of this embodiment is finished.

  As described above, in this embodiment, since the positive pressure sensor is provided together with the positive pressure damper, and the amount of supplied air can be adjusted accordingly even when the fluctuation of the positive pressure in the coating chamber 2 is small, It is possible to always maintain the positive pressure level in the room at an optimum level.

  The positive pressure management system of the present invention and the positive pressure management method of the painting chamber using the system can always maintain the degree of positive pressure in the painting chamber to be optimal at all times. It is applicable to.

It is a figure which shows the whole positive pressure management system of this invention. It is a flowchart for demonstrating the positive pressure management method of this invention. It is the block diagram which showed the relationship between the positive pressure sensor, inverter circuit, and drive part in the positive pressure management system of this invention. It is a figure which shows the conventional positive pressure management system whole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Positive pressure management system 2 Coating chamber 201 2nd exhaust port 202 Exhaust port 203 Air supply port 3 Coating booth 4 Exhaust means 5 Exhaust fan 6 Positive pressure sensor 601 Rotary encoder 602 Feather 7 Positive pressure damper 8 Supply pipe 9 Supply device 10 Air supply fan 11 Inverter circuit

Claims (2)

Painting room (2),
A painting booth (3) arranged continuously in the painting chamber (2);
Exhaust means (4) for exhausting air in the painting chamber (2), which is arranged continuously in the painting booth (3);
An air supply device (10) for supplying air into the painting chamber (2);
An air supply pipe (8) having one end communicating with the coating chamber (2) and the other end connected with the air supply device (10);
A positive pressure damper (7) capable of opening and closing an exhaust port (202) formed in the coating chamber (2);
A second exhaust port (201) formed in the coating chamber (2);
A rotary encoder (601) and a wing (602) attached to the shaft of the rotary encoder (601) are arranged in the painting chamber (2) in an arrangement to close the second exhaust port (201). was a positive pressure sensor (6),
A control circuit (11) connected to the positive pressure sensor (6) and connected to the air supply device (10),
Upon receiving the rotation of the wing (602), the rotary encoder (601) sets the rotation direction of the wing (602) as an output signal from the A phase or the B phase, and the rotation speed of the wing (602) as the B phase or the A phase. By detecting the degree of positive pressure in the painting chamber (2), the air supply device (10) is controlled by the control circuit (11) according to the rotation of the wing (602). A positive pressure management system for the painting room, which is made possible. The painting room (2), the painting booth (3) arranged continuously in the painting room (2), and the air in the painting room (2) arranged continuously in the painting booth (3) are discharged. An exhaust means (4) for supplying air, an air supply device (10) for supplying air into the coating chamber (2), one end communicating with the coating chamber (2), and the other end at the other end An air supply pipe (8) to which an air supply device (10) is connected; and a positive pressure damper (7) capable of opening and closing an exhaust port (202) formed in the coating chamber (2). 4) While discharging air in the painting chamber (2) by 4), air is supplied into the painting chamber (2) by the air supply device (10), and the positive pressure degree of the painting chamber (2) is set in advance. If the air pressure exceeds the upper limit, the positive pressure damper (7) is operated to exhaust a desired amount of air from the exhaust port (202). In positive pressure management method capable and the coating chamber,
A second exhaust port (201) is formed in the coating chamber (2), and the second exhaust port (201) is closed, and the coating chamber (2) is provided with a rotary encoder (601) and the A positive pressure sensor (6) composed of a wing (602) attached to the shaft of the rotary encoder (601) is disposed, and the air supply to the positive pressure sensor (6) is provided via a control circuit (11). The device (10) is connected, and the rotation of the wing (602) is received. The rotary encoder (601) sets the rotation direction of the wing (602) as an output signal from the A phase or B phase, and the wing (602) By making the number of revolutions an output signal from the B phase or the A phase, the degree of positive pressure in the coating chamber (2) is detected, and the control circuit (11) determines the positive pressure in accordance with the rotation of the wing (602). Control air supply device (10) Positive pressure control method of the coating chamber, characterized by.

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