JP5862009B2 - VOC reduction device - Google Patents

Description

  The present invention relates to a VOC reduction device that reduces VOCs diffused from parts and materials.

  For the purpose of preventing chemical substance hypersensitivity, sick house syndrome, etc., various industries are studying methods for reducing VOC (volatile organic compounds) emitted from parts and materials, and measures for reducing them. However, even if the VOC to be regulated is not included in the material, the material may adsorb VOC generated from other materials or production processes, making it difficult to reduce the diffusion of VOC. As materials such as sound absorbing materials used for automobile parts, used clothes such as clothing are recycled, and paradichlorobenzene used in insect repellents and the like may be detected from the sound absorbing materials and the like. General VOCs can be reduced by diffusing VOCs adsorbed on the parts and materials by heating the parts and materials (see, for example, Patent Document 1).

JP 2007-301507 A

  However, it is difficult to realize the operation of heating parts and materials because it requires equipment and time. Therefore, in recent years, simple and effective VOC reduction measures have been studied.

  Therefore, an object of the present invention is to enable a simple and effective implementation of VOC reduction measures.

  In order to achieve the above object, the present invention provides a cylindrical casing in which a flow path is formed between a suction port and a discharge port, and the VOC reduction object provided on the flow path in the casing. A heater that heats the VOC reduction target to promote the dissipation of VOC, and a heater that is provided on the flow path downstream of the heater in the casing, and dissipates from the VOC reduction target by heating by the heater. A blower that sucks the VOC together with air, a concentration sensor that is provided on the flow path in the casing and detects the VOC concentration in the air sucked by the blower, and a VOC concentration in the air that is detected by the concentration sensor And a controller that controls the rotational speed of the blower so that the maximum concentration is obtained.

  The VOC reduction device may include a VOC adsorbent that is provided on the flow path downstream of the blower in the casing and that adsorbs VOC diffused from the VOC reduction target.

  The VOC reduction device may include a chamber that is connected to a suction port of the casing and accommodates the VOC reduction target.

  According to the present invention, there is an excellent effect that it is possible to easily and effectively implement a VOC reduction measure.

It is the schematic of the VOC reduction apparatus which concerns on one Embodiment of this invention. It is the schematic of the VOC reduction apparatus which concerns on other embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  The VOC reduction device according to the present embodiment is a device for reducing VOCs emitted from parts and materials (hereinafter also referred to as VOC reduction objects). In addition to automobile parts and materials, home appliances and furniture It can also be used for building materials.

  As shown in FIG. 1, the VOC reduction device 10 according to this embodiment includes a cylindrical casing 11 in which a flow path 11c is formed between a suction port 11a and a discharge port 11b, and a flow path 11c in the casing 11. A heater (heater) 12 that is provided above and heats the VOC reduction target A to accelerate (accelerate) VOC emission (desorption) from the VOC reduction target A to which the VOC is adsorbed; Provided on the flow path 11 c downstream of the heater 12, provided on the flow path 11 c in the casing 11, and a fan (blower) 13 for sucking together with air the VOC diffused from the VOC reduction target A by heating by the heater 12. And a concentration sensor 14 for detecting the VOC concentration in the air sucked by the fan 13, and a filter according to the VOC concentration in the air detected by the concentration sensor 14. ECU as controller for controlling the emission 13 and an (electronic control unit) 15.

  The casing 11 is arrange | positioned so that the suction inlet 11a may oppose the surface of the VOC reduction target object A at intervals.

  The heater 12 of the present embodiment is an infrared heater (heating infrared lamp). The heater 12 is set to heat the surface of the VOC reduction target A to a predetermined temperature (80 ° C. in the present embodiment).

  The fan 13 sucks air into the casing 11 (flow path 11c) from the suction port 11a, and discharges air in the casing 11 (flow path 11c) from the discharge port 11b. The fan 13 is electrically connected to the ECU 15, and the rotational speed (or rotational speed) is controlled by the ECU 15.

  The concentration sensor 14 of the present embodiment is a semiconductor sensor. Further, the concentration sensor 14 of the present embodiment is provided on the flow path 11 c downstream of the fan 13 in the casing 11. The concentration sensor 14 is electrically connected to the ECU 15 and outputs a detection signal to the ECU 15.

  The ECU 15 of this embodiment is provided in the casing 11. The ECU 15 monitors (monitors) the VOC concentration (emission concentration) in the air detected by the concentration sensor 14 and sucks it by the fan 13 so that the VOC concentration in the air detected by the concentration sensor 14 becomes the maximum concentration. To control the speed of the air (that is, the rotational speed of the fan 13).

  The VOC reduction device 10 according to this embodiment includes a VOC adsorbent 16 that is provided on the flow path 11c downstream of the fan 13 in the casing 11 and adsorbs the VOC diffused from the VOC reduction target A.

  The VOC adsorbent 16 is composed of, for example, a filter (for example, an aluminum honeycomb material) and a substance that is supported on the filter and has an adsorbing action (for example, activated carbon).

  Next, the operation of the VOC reduction device 10 according to this embodiment will be described.

  The VOC adsorbed on the surface of the VOC reduction object (parts, materials, etc.) A has a transpiration-dominated emission form. In the transpiration-dominated type, the surface flow velocity is proportional to the velocity (VOC emission velocity). That is, it is possible to accelerate VOC emission from the VOC reduction target A by heating the surface of the VOC reduction target A while ensuring convection on the surface of the VOC reduction target A.

  In the VOC reduction device 10 according to the present embodiment, a heater 12 for heating the VOC reduction target A to accelerate VOC emission from the VOC reduction target A adsorbed by the VOC is a flow path in the casing 11. 11c. In addition, a fan 13 for controlling the air speed in order to optimize the VOC diffusion speed is provided on the flow path 11 c downstream of the heater 12 in the casing 11. The rotation of the fan 13 creates convection on the surface of the VOC reduction target A, and the VOC dissipated from the VOC reduction target A by heating by the heater 12 is collected by the VOC adsorbent 16 downstream of the fan 13.

  The VOC adsorbent 16 is appropriately replaced when the VOC adsorption amount is saturated. In the VOC reduction device 10 according to the present embodiment, the ECU 15 measures the usage time of the VOC adsorbent 16, and when the measured usage time of the VOC adsorbent 16 exceeds a predetermined time, the VOC adsorption of the VOC adsorbent 16 is performed. The amount is judged to be saturated.

  Further, in the VOC reduction device 10 according to the present embodiment, a concentration sensor 14 for determining whether the VOC emission from the VOC reduction target A is optimal or inappropriate is provided on the flow path 11c in the casing 11. The ECU 15 monitors the VOC concentration in the air sucked by the fan 13 by the concentration sensor 14. The ECU 15 controls the rotation speed of the fan 13 so that the VOC concentration in the air detected by the concentration sensor 14 becomes the maximum concentration. Specifically, the ECU 15 changes the number of rotations of the fan 13 to find the number of rotations of the fan 13 at which the VOC concentration in the air detected by the concentration sensor 14 becomes the maximum concentration.

  When the VOC emission from the VOC reduction target A is completed, the VOC reduction device 10 is moved to a location where the VOC is newly adsorbed. For example, when the VOC concentration in the air detected by the concentration sensor 14 falls below a predetermined concentration (for example, 50% of the maximum concentration), the ECU 15 determines that the VOC emission at that location has ended. In the present embodiment, the movement of the VOC reduction device 10 is manual, but the movement of the VOC reduction device 10 may be automatic using an actuator or the like. Alternatively, the VOC reduction device 10 may be fixed and the VOC reduction target A may be moved.

  In the VOC reduction device 10 according to this embodiment, the heater 12 for heating the VOC reduction target A and the VOC emission rate are optimized in order to accelerate the VOC emission from the VOC reduction target A adsorbed by the VOC. By providing the fan 13 for controlling the speed of air on the flow path 11c in the casing 11, no special equipment for heating the VOC reduction target A is required, and VOC is reduced. Countermeasures can be easily implemented.

  In the VOC reduction device 10 according to the present embodiment, the VOC concentration in the air sucked by the fan 13 is monitored by the concentration sensor 14, and the rotation speed of the fan 13 is controlled so that the VOC concentration becomes the maximum concentration. Thus, the VOC emission from the VOC reduction target A can be optimized, and VOC reduction measures can be effectively implemented.

  In short, the VOC reduction device 10 according to the present embodiment makes it possible to simply and effectively implement a measure for reducing the invisible VOC.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various other embodiments can be adopted.

  For example, although the above embodiment assumes VOC reduction in the production process, in the case of a single component, by using a chamber 20 or the like (see FIG. 2) equipped with a VOC reduction device 10 of similar specifications, Depending on the size of the parts, simultaneous processing of a plurality of parts is also possible. The chamber 20 is connected to the suction port 11 a of the casing 11. In FIG. 2, reference numeral 21 denotes an inlet portion of the chamber 20.

  Further, another concentration sensor 17 (see FIG. 1) is provided on the flow path 11c downstream of the VOC adsorbent 16 in the casing 11, and the ECU 15 causes the concentration of the VOC concentration in the air that has passed through the VOC adsorbent 16 by the concentration sensor 17. May be determined so that the VOC adsorption amount of the VOC adsorbent 16 is saturated when the VOC concentration (post-treatment concentration) exceeds a predetermined concentration. The density sensor 17 is composed of, for example, a semiconductor sensor.

10 VOC reduction device 11 Casing 12 Heater (heater)
13 Fan (Blower)
14 Concentration sensor 15 ECU (control unit)
16 VOC adsorbent 20 Chamber A VOC reduction target (parts and materials, etc.)

Claims (3)

A cylindrical casing in which a flow path is formed between the suction port and the discharge port, and the VOC reduction target provided on the flow path in the casing to promote the VOC emission from the VOC reduction target A heater that heats an object, a blower that is provided on the flow path downstream of the heater in the casing and sucks together with air the VOC that has been diffused from the VOC reduction target by heating by the heater, and the casing It provided in the flow path of the blower downstream of the inner, and the concentration sensor for detecting the VOC concentration in the air sucked by the blower, so that VOC concentration in the air detected by the concentration sensor is maximum concentration and a controller for controlling the rotational speed of the blower, said casing, pair separates the suction port distance from the surface of the VOC reduction target Are arranged to, in that the control device varies the rotational speed of the blower, VOC concentration of air detected by the concentration sensor is intended to find the number of revolutions of the blower of maximum concentration Characteristic VOC reduction device.   The VOC reduction device according to claim 1, further comprising a VOC adsorbent that is provided on the flow path downstream of the blower in the casing and adsorbs the VOC diffused from the VOC reduction target.   The VOC reduction device according to claim 1, further comprising a chamber that is connected to a suction port of the casing and accommodates the VOC reduction target.

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