JP4497351B2 - Steam exhaust device - Google Patents

Description

  The present invention relates to a steam discharge device that can discharge steam without diffusing steam in the surroundings when performing an operation that generates steam of steam, oil, or a solvent such as alcohol. The present invention relates to a steam discharge device that can cope with one or a small number even in a continuous case.

  In a food factory, for example, a lunch box manufacturing factory, steam of water or oil is generated in the cooking process of rice or side dishes or the cooking process of fried food. Conventionally, steam generated with cooked rice and boiled food is discharged to the outside by a ventilation fan installed on the ceiling or wall of the factory building, and the oil vapor generated with fried food is the oil tank of a fried food maker. In general, a hood is installed above the hood, sucked by an exhaust fan attached to the back surface of the hood, and oil vapor is guided out of the building by a dedicated duct attached to the hood and discharged.

  By the way, a plurality of air blowing pipes are arranged in parallel so as to surround a space for performing an operation such as welding, and air is blown out from each pipe toward one of the adjacent pipes, and from above the space by the exhaust means. By forcibly exhausting air, a tornado airflow with a sharp velocity distribution leading to the intake port is formed in the space, and harmful gases generated during work such as welding are not diffused to the tornado airflow. There has been proposed a diffusion preventing apparatus for harmful gases, etc., which is transferred from the space in association with the exhaust and discharged to the outside by a duct of an exhaust means (see, for example, Patent Document 1).

  According to this proposal, a steam discharge device is constructed by enclosing a space in which work involving the generation of steam, for example, a surrounding space including a frying device, is surrounded by an air blowing pipe, thereby diffusing oil vapor accompanying the fried food to the surroundings. It can be transferred efficiently and discharged outside the factory building.

However, the discharge device according to this proposal must basically be installed for each steam generation work process. For example, when performing steam generation work on an object in two consecutive steps, the discharge of those steam is performed. It was not possible to save labor by dealing with one discharge device.
JP 4-117769

  Accordingly, an object of the present invention is to cope with the case where the operation of generating vapor of water vapor, oil vapor, or solvent such as alcohol is performed continuously on an object, for example, in two steps, and the vapor is introduced to the surroundings. It is an object of the present invention to provide a vapor discharge device that can be discharged without being diffused and can save the device.

To achieve the above object, the steam discharge apparatus of the present invention, each pipe blowing air in the direction facing substantially in one of the pipe adjacent, four and air blowoff pipe, the air blowout pipe four corners an exhaust means to face the air inlet from above the space having a rectangular horizontal cross section is divided into inside by placing, capturing the condensate of the vapor existing in the space, it is disposed below the air inlet The drain pan is disposed at the upper center position in the longitudinal direction of the virtual rectangle connecting the air blowing pipes, and blows air from the air blowing pipe and blows out the air. the air, by forcibly exhausted from above the space by the front Symbol exhaust means, a rectangular longitudinal direction of the space leading to the air inlet in the space two And portions respectively form a tornado airflow was characterized by the vapor present in the space and so as to be discharged to accompany the tornado flow.

  The inventors of the present invention have made extensive studies to make it possible to deal with a single object with a single steam discharge device even when a plurality of processes involving generation of steam are continuously performed on the object. . That is, when performing work that generates steam, in order to condense and capture the generated steam, a drain pan is disposed above the space where the steam generation work is performed, and the direction of one adjacent pipe from a plurality of air blowing pipes The air is blown out from the top of the space, and the drain pan is positioned below the intake port, and when the steam discharge device is operated, the air is exhausted in the presence of the spatial influence of the drain pan. As a result, it was found that a plurality of tornado airflows reaching the air inlets were formed in the space.

  The present invention has been obtained based on the above findings. The tornado airflow generated in the space surrounded by the air outlet pipe has a sharp velocity distribution in which the velocity of the center of the airflow is very fast compared to the surroundings. The existing steam can be efficiently transferred to the intake port without being diffused to the surroundings, and the steam can be discharged to an appropriate external location through a duct or the like of the exhaust means. A plurality of the tornado airflows are formed in the space surrounded by the air blowing pipes, so even if the steam generation operation continues for a plurality of processes on the target object, it is possible to deal with one steam discharge device. This makes it possible to save the apparatus.

  The number and location of the tornado airflow are as follows: the size of the space enclosed by the air blowing pipe, the number of pipes, and each pipe blows air in the direction of one of the adjacent pipes. The process of generating steam for the target object varies depending on the conditions of the components of the steam discharge device and the operating conditions of the device, such as the air blowing direction, the flow rate and flow rate of the blown air, the installation position of the drain pan, etc. These conditions are experimentally determined so that the necessary number of generated tornado airflows and appropriate generation positions can be obtained by specifically considering the number and the like. Based on the required conditions, a steam discharge device was constructed in an open booth where the work of generating steam was performed, and individual locations where tornado airflow was generated in the space surrounded by the air blowing pipes By defining the work place of each process of the multi-stage steam generation work, operating the steam discharge device under the obtained conditions, moving the object sequentially to each work place, generating steam for each process on the object Will work.

  According to the present invention, when the operation of generating steam for an object is continuously performed for a plurality of processes, the steam generated in each process can be discharged without diffusing to the surroundings. It becomes possible to deal with the discharge device, and the steam discharge device can be saved.

  FIG. 1 is a partially cutaway plan view showing an embodiment of the steam discharge device of the present invention, FIG. 2 is a partially cutaway front view of the device, and FIG. 3 is a partially cutaway side view of the device. FIG. 4 is a plan view schematically showing a tornado airflow generated in the present apparatus.

  In the figure, reference numeral 8 denotes a hot water bath, and 1 denotes a steam discharge device installed on the hot water bath 8. The hot water bath 8 is provided with a plug heater (not shown) at the inner lower part, and the water stretched in the hot water bath 8 is heated to hot water of, for example, about 80 ° C. with the plug heater, and is placed in a container (not shown) with the heat of the hot water, for example It is used for toning the paint with a colorant in two steps while heating the paint. Therefore, the hot water bath 8 is formed to be long in the side so that the color of the paint can be continuously adjusted in each region that bisects the longitudinal direction of the hot water bath 8. The vapor discharge device 1 is used to discharge the solvent vapor generated in each color matching process.

  In the steam discharge device 1 of this embodiment, four air blowing pipes P1 to P4 are erected at the four corners of the hot water bath 8, and the pipe P (P1 to P4) is covered with the hood 3 so that the upper end of the pipe P is covered. In addition to passing through, an intake port of a duct 4 connected to a forced exhaust means (not shown) faces an intake opening 3 a in the center of the upper end of the hood 3, and a drain pan 5 is disposed below the duct 4.

  The vertical angles 2 shorter than the pipes P are attached to the four corners of the hot water bath 8, and the pipes P are erected at the four corners of the hot water bath 8 by supporting the pipes P inside the angles 2. ing. A rectangular thin support frame 6 is provided at the upper ends of the four angles 2, and the hood 3 is mounted on the support frame 6. A side plate 7 is attached between the front and rear angles 2. The side plate 7 is provided to reinforce the structure composed of the four pipes P and the hood 3 assembled by the angle 2 and the support frame 6. If the assembly strength of the structure is sufficient, the side plate 7 It is unnecessary.

  The hood 3 has a shape in which a rectangular skirt portion 3c is connected to the lower end of a trapezoidal roof portion 3b having an inclination angle of, for example, 30 °. In the present invention, the tornado airflow is formed by the air blown out from the pipe P, and the air is exhausted in the form of the tornado airflow. Therefore, the exhaust efficiency by the exhaust means is high without providing the hood 3. Therefore, the hood 3 is not always necessary, but if the hood 3 is present, the exhaust efficiency is increased accordingly.

  The tip of the pipe P passes through the skirt 3c of the hood 3 and extends upward, and the extended tip of each pipe P has an air feed pipe from the pneumatic feed means (both not shown). Is connected. A space H surrounded by four pipes P is defined between the hot water bath 8 and the hood 3. Each pipe P has air blow holes h (FIG. 4) having a diameter of 1.5 mm at a pitch of 100 mm in a portion located in the space H, that is, a portion from a position slightly above the upper surface of the hot water bath 8 to the support frame 6. In one row. The blowing hole h of each pipe P is directed in the direction of one adjacent pipe so that the blowing air surrounds the space H in the horizontal direction. In this embodiment, the air blowing directions from the pipes P were P1 → P2 and P4 → P3, P4 → P3 and P3 → P2, respectively, and were inclined 30 ° inward. The pipe P is a polyvinyl chloride pipe having a nominal diameter of 100 mm, the total length is 800 mm, the length from the lower end of the pipe P to the support frame 6 is 1400 mm, and the protruding length from the hood 3 is 300 mm.

  The drain pan 5 is hung on the back surface of the roof portion 3 b of the hood 3 by a rod 5 a and is positioned below the opening 3 a in the hood 3. In this embodiment, the drain pan 5 has a square plate shape with one side of 440 mm and a depth of 40 mm, and the distance from the opening 3 a is 250 mm. This drain pan 5 has a role of capturing the condensed steam generated when steam is generated in the hot water bath 8, and is provided for this purpose. There is also an important role of forming two spiral airflows in the space H, and it is also provided for this purpose. The latter action is that when the air blown out from the pipe P is forcibly exhausted from above the space H and the drain pan 5 is present near the upper portion of the space H, the drain pan 5 is in space against the air flow in the space H. It seems that it works to form two spiral airflows. Therefore, in the present invention, the term “drain pan” is not limited to condensing and trapping the vapor generated during the work above the space H, but has a spatial effect on the air flow in the space H. It also includes structures that affect

The hot water bath 8 is made of stainless steel, has a length of 1900 mm, a width of 800 mm, and a height of 500 mm. A drain tapping 8 a is attached to one side wall of the bath 8. The hood 3 has a height of 500 mm, and the opening 3 a at the upper end has a square shape with a side of 350 mm, and the air inlet at the tip of the duct 4 is attached to this via a connector. The steam discharge device 1 operates at an air blowing flow rate from the pipe P of, for example, 720 to 880 m ³ / hour, and an air exhaust flow rate of the exhaust means of, for example, 2100 to 2500 m ³ / hour.

  In this example, the steam discharge device 1 was constructed and operated with the above specifications and conditions. Thereby, when air is blown out from the pipe P into the space H and the blown-out air is forcibly exhausted from above the space H, the longitudinal direction of the rectangle is divided into two equal parts in the space H due to the spatial effect of the drain pan 5. The tornado airflow Q1 caused by the air blown from the pipes P1 and P2 and the tornado airflow Q2 caused by the air blown from the pipes P3 and P4 are generated in the region, and are formed so as to cover almost half of the upper surface of the hot water bath 8. It was. These tornado airflows are airflows in which the radius rapidly decreases as they rise while turning in the space H, and the velocity at the center of the airflow increases rapidly. From the space H to the opening 3 a of the hood 3. .

  According to such a tornado airflow, the steam existing in the space H can be entrained and efficiently transferred from the space H to the opening 3a of the hood 3 without enlarging the exhaust means. . Therefore, in the two areas obtained by dividing the longitudinal direction of the hot water bath 8 into two, the paint is continuously toned, and when the solvent evaporates from the paint and moves into the space H in each of the toning operations, Since the tornado airflows Q1 and Q2 are generated on each area of the hot water bath 8, the solvent vapor is transferred from the space H by the tornado airflow, and passes through the duct 4 from the opening 3a of the hood 3 to the external gas processing device. It is discharged to an appropriate place such as, and does not diffuse from the space H to the surroundings.

  As described above, according to this embodiment, a single steam exhausting device copes with a two-step operation involving generation of a solvent vapor in two regions obtained by dividing a hot water bath into two equal parts. It is possible to discharge the solvent vapor generated in step 1 without diffusing to the surroundings, and to save labor in the vapor discharge device.

The partially notched top view which shows one Example of the steam discharge apparatus of this invention. The partially notched front view of the apparatus. The partially cutaway side view of the apparatus. The top view which shows typically the tornado airflow which generate | occur | produces with this apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steam exhaust device 2 Angle 3 Hood 3a Opening 4 Duct 5 Drain pan 6 Support frame 7 Side plate 8 Hot water bath H Space P1-P4 Air blowing pipe h Air blowing hole Q1, Q2 Tornado airflow

Claims (3)

Each pipe blowing air in the direction facing substantially in one of the pipe adjacent the space having four and air blowoff pipe, a rectangular horizontal cross-section which is divided into inner by placing the four corners of the air blowout pipe An exhaust means facing the intake port from above, and a drain pan disposed below the intake port that captures the condensate of the vapor existing in the space,
The drain pan is arranged at the upper height position in the longitudinal center of a virtual rectangle connecting the air blowing pipes,
With blowing air from the air outlet pipe, the balloon air by forcibly exhausted from above the space by the front Symbol exhaust means, bisects the rectangular longitudinal direction of the space leading to the air inlet into the space A steam discharge device characterized in that a tornado airflow is formed in each of the portions and the steam existing in the space is discharged along with the tornado airflow.   In the space which has a rectangular horizontal section divided inside by four air blowing pipes which blow off air in the direction which turned to the pipe which each pipe adjoined, and the air blowing pipes in four corners An exhaust unit facing the air intake port from above, and a drain pan disposed below the air intake port for capturing vapor condensate existing in the space,
  The drain pan is disposed at a height position above the space,
When the four pipes are set to P1, P2, P3, and P4 counterclockwise starting from the starting point of one short side of the rectangle, the air blowing directions from the pipes P1 to P4 are P1 → P2, P2 → P3, P4 → P3, P3 → P2 and inclined inside the virtual rectangle connecting the four pipes,
  Air is blown out from the air blowing pipe and the blown air is forcibly exhausted from above the space by the exhaust means to form a tornado airflow that reaches the intake port in the space and exists in the space A steam discharge device characterized in that the steam to be discharged is discharged along with the tornado airflow.   The hood which covers the upper end surface of the space is provided, the intake port of the exhaust means is attached to an opening provided at the upper end of the hood, and the drain pan is supported inside the hood. Or the steam discharge apparatus of 2.

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