JPH0772640B2 - Counter-rotating ventilation - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a contra-rotating type ventilation device in which a pair of axial reversing impellers and a drive motor for rotationally driving the axial flow impellers are arranged in series in a cylindrical main body. Is.

[Prior Art] FIG. 5 is a sectional view showing a conventional counter-rotating ventilation device disclosed in, for example, Japanese Patent Laid-Open No. 61-4895. That is, in this counter-rotating type ventilation device, axial flow impellers 21 and 21a and drive motors 22 and 22a for rotationally driving the axial flow impellers 21 and 21a are arranged in series on the center line in a straight-tube main body 20 having flanges at both ends. It is composed. One set of the axial flow impeller 21 and the drive motor 22 is inside the main body 20 by one motor mounting leg 23, and another set of the axial flow impeller 21a and the drive motor 22a is inside the main body 20 by another motor mounting leg 24a. Installed.

In the above-described counter-rotating type ventilation device, the rotation directions of the two axial flow impellers 21 and 21a that are rotationally driven by the respective drive motors 22 and 22a are opposite, but the air blowing direction is as shown by the arrow in the figure. It is used for ventilation by connecting a ventilation duct (not shown) or the like and connecting one to the inside and the other to the outside.

[Problems to be Solved by the Invention] In a conventional counter-rotating ventilation device, the operation after installation and construction is confirmed by a test run. However, due to the structure, the axial flow impellers 21 and 21a are seen from the outside. Since it is not visible, the suitability of operation is judged by the flow and volume of wind at the end of the ventilation duct. However, since the flow and volume of wind at the end of the ventilation duct are factors that change depending on the difference in piping configuration and piping length, adequacy of operation may depend on improper judgment, which is not normal operation. In some cases, it was used as it was. Further, in order to carry out adjustment and maintenance of the axial flow impellers 21 and 21a after installation, it is necessary to remove all the piping of the ventilation duct. The present invention has been made to solve such a conventional problem, and the first object thereof is to provide a counter-rotating ventilation device in which adjustment and maintenance of an axial flow impeller or the like after installation is easy. The second is to obtain a contra-rotating ventilation device that can visually confirm the operation after installation and construction.

[Means for Solving the Problems] A counter-rotating type ventilation device according to the present invention is an axial flow impeller and a rotary impeller that are formed in a cylindrical resin body and have seal packings on both outer circumferences. A pair of driving motors to be driven are arranged in series, and the main body is covered with a casing having a split structure that is composed of two semi-cylindrical members and is joined by screws. Is equipped with connection port members for connecting ventilation ducts to both ends thereof.

Further, another counter-rotating type ventilation device according to the present invention is formed of a resin that is transparent in a cylindrical shape, and has an axial flow impeller in a main body provided with seal packings on both outer circumferences and a drive for rotationally driving the impeller. A pair of motors are arranged in series, and the main body is
It is made up of two semi-cylindrical members and is covered with a split casing that is joined by screws.One of the members of this casing is equipped with a connection port member for connecting ventilation ducts to both ends. Further, the casing is provided with a confirmation opening through which each axial impeller in the main body can be visually recognized.

[Operation] In the contra-rotating type ventilation device of the present invention, one member forming the casing can be removed while being connected to the ventilation duct, and one member forming the casing can be removed. , The main body can be removed without removing the piping.

Further, in the other counter-rotating type ventilation device of the present invention, not only the main body can be removed without removing the pipe by removing one member constituting the casing, but also the opening for confirmation in the installed and installed state. The state of the axial flow impeller in the main body can be visually confirmed from the section.

[Embodiment] All of FIGS. 1 to 4 show an embodiment of the counter-rotating ventilation device according to the present invention. That is, the contra-rotating ventilation device of this example includes two axial flow impellers 2 and 2a in the cylindrical main body 1 and two drive motors 3 that rotate the impellers.
3a is arranged in series, and the two axial flow impellers 2 and 2a are rotated in opposite directions. Two drive motors 3,
3a is fixed to a holding portion formed in the central portion of each of the motor mounting legs 4 and 4a with a screw. The main body 1 is formed of a transparent resin into a cylindrical body through which the inside can be seen, and two rows of ribs 5 are integrally formed in the outer circumference of the openings at both ends in the circumferential direction at intervals, and the grooves between the respective ribs 5 are formed. A seal packing 6 is attached to the portion. The motor mounting legs 4 and 4a, to which the drive motors 3 and 3a are fixed, have arc-shaped flanges formed at the free ends of the legs fitted in the body 1 and screwed from the outside of the body 1 to the body. 1 are attached respectively.
The axial flow impellers 2 and 2a are attached to rotating shafts of the drive motors 3 and 3a extending in the same direction, and are rotated in opposite directions by the drive motors 3 and 3a. However, the blowing direction is one direction as shown by the arrow in FIG. 1 as in the conventional example.

The main body 1 having the above structure is entirely covered with a casing 8 formed by joining two casing members 7 and 7a each having a semi-cylindrical shape. Casing member 7
Has a joint flange 9 extending in the radial direction at an edge parallel to the center line of the semi-cylindrical portion, and cylindrical connection port members 10 are fixed to both ends thereof. Also, the casing member
7a has a joining flange 11 that projects in the radial direction at the edge parallel to the center line of the semi-cylindrical portion. A hook 12 for hooking is bent and formed on one of the joint flanges 11. The casing members 7 and 7a are joined to each other by joining the joint flanges 9 and 11 to each other and fastening them with screws 13 to form a cylindrical casing 8.
And the main body 1 is covered by the seal packing 6. Each casing member 7a has an axial flow impeller in its main body 1.
At the positions corresponding to 2, 2a, a confirmation opening 14 is formed which allows each of the axial flow impellers 2 and 2a to be visually recognized. it can. A ventilation duct (not shown) is connected to each connection port member 10 of the casing member 7, and ventilation is performed through the ventilation duct. The ventilation duct is an air supply duct when the counter-inverted ventilation device is used for air supply and an exhaust duct when it is used for air exhaust. The sound deadening member provided in the above is also included in the ventilation duct here as a kind of duct.

Confirmation of the operation after the installation and installation of the contra-rotating ventilation device of the above-mentioned configuration is performed by directly observing the rotating state of each axial flow impeller 2, 2a from the confirmation opening 14 and at the end of the ventilation duct. This can be done by examining the flow and volume of the wind, and the appropriateness of the operation can be accurately determined. Therefore, there are almost no cases of being used without being in normal operation. Also, after the installation, for adjustment and maintenance of the axial flow impellers 2, 2a, the main body 1 can be removed by removing the casing member 7a from the casing member 7 by removing the screw 13 without removing the piping of the ventilation duct. , Can be easily implemented in the installed and installed state. Since both sides of the confirmation opening 14 are sealed by the seal packing 6 of the main body 1, there is no air leakage from this portion.

In the counter-rotating type ventilation device, the first-stage axial flow impeller 2 and the second-stage axial flow impeller 2a have the same flow directions but different rotation directions, and by reciprocating each other, The swirling fluid pressure component generated after the first stage is rectified in the second stage,
High static pressure is obtained by collecting the swirling flow pressure component as static pressure. Therefore, due to incorrect wiring, etc., the axial flow impeller 2,2a
If the rotation is reversed or does not rotate, the blowing performance will be extremely reduced, so it is essential to confirm the operation by trial operation after installation and construction.

[Advantages of the Invention] As described above, according to the counter-rotating ventilation device of the present invention,
One member forming the casing can be removed with the ventilation duct connected, and the main body can be removed without removing the pipe by removing the one member forming the casing. Therefore, the adjustment and maintenance of the axial flow impeller can be performed in the installed and installed state.

Further, according to the other counter-rotating type ventilation device of the present invention, adjustment and maintenance of the axial flow impeller can be easily performed in the installed and installed state, and the operation of the axial flow impeller can be directly viewed from the outside. It is possible to confirm the reliable operation.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a contra-rotating ventilation device showing an embodiment of the present invention, FIG. 2 is a perspective view showing the same body, and FIG.
FIG. 4 is an exploded perspective view showing the structure of each motor mounting leg and each drive motor, FIG. 4 is a perspective view showing the structure of the same casing, and FIG. It is a longitudinal cross-sectional view which omits and shows. In the figure, 1
Is a main body, 2,2a is an axial flow impeller, 3,3a is a drive motor, 4,4a is a motor mounting leg, 6 is a seal packing, 7 and 7a are casing members, 8 is a casing, 10 is a connection port member, 13 Is a screw, 14
Is a confirmation opening. The same reference numerals in the drawings indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-70900 (JP, A) JP-A-3-63437 (JP, A) Actually open Sho 51-12154 (JP, U) Actually open 3- 31240 (JP, U) Actual flat 2-58643 (JP, U)

Claims (2)

[Claims] 1. A main body formed of resin in a cylindrical shape and provided with seal packing on both outer circumferences, an axial flow impeller arranged in series in the main body, a drive motor for rotationally driving the same, A casing having a divided structure, which is composed of two cylindrical members and covers the entire outside of the main body by joining with a screw, and a connection port member which is attached to both ends of one member constituting the casing and which connects a ventilation duct. A counter-rotating ventilator with a built-in configuration. 2. A main body formed of a resin that is transparent in a cylindrical shape and provided with seal packing on both outer circumferences, an axial flow impeller arranged in series in the main body, and a drive for rotationally driving the axial flow impeller. A casing composed of two parts, a motor and a semi-cylindrical shape, which covers the entire outside of the main body by joining with screws, and a connection for connecting ventilation ducts, which is attached to both ends of one of the parts constituting this casing. A counter-rotating ventilation device having a mouth member, which is formed in the casing and has a visual recognition opening through which each axial impeller in the main body can be visually recognized.