JP2002079937A - Method of manufacturing ventilator and ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform assembling/disassembling work. SOLUTION: An electric motor 55 on which an exhaust blower and a feed blower are installed is installed in an exhaust flow passage 122 for a silencer box 100. The silencer box 100 is partitioned into exhaust flow passages 122, 123 and feed flow passages 132, 134 with partition plates. Sound absorbing materials are installed on the wall faces of the air flow passages 122, 123, 132, 134. When a blowing device is housed, each blower corresponds to the air flow passage. Then, an opening through which the blowing device is inserted is covered with a cover 150. The blowers can be assembled/disassembled sideways and the blowing device can be inserted downward, therefore simplifying construction, facilitating work and producing a reduction in noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a ventilation device for a high-speed vehicle.

[0002]

2. Description of the Related Art A high-speed vehicle represented by a Shinkansen is an airtight structure, and is equipped with a ventilator for switching the air inside the vehicle and the air outside the vehicle at a predetermined ratio. This ventilator has the ability to ventilate while maintaining pressure fluctuations in the vehicle within a predetermined range with respect to a compression wave (positive pressure) and an expansion wave (negative pressure) when passing through a tunnel.

As described in Japanese Patent No. 2658521, this ventilator has an exhaust fan and an air supply fan at both ends of a motor having a horizontal rotating shaft. In order to cool the electric motor, the electric motor is surrounded by a case so that the exhaust air from the passenger room reaches the exhaust fan via the case.

[0004]

Generally, in a ventilation device, a case for cooling a motor is fixed to an end bracket of the motor. This makes it difficult to assemble the ventilation device.

Further, in order to maintain the predetermined performance of the ventilation device, it is necessary to periodically remove (clean) dust accumulated on the impeller of the blower or replace the bearing of the electric motor. That is, a disassembly operation for the maintenance operation of the ventilation device is required. In this case, since the case is fixed to the end bracket of the electric motor, the disassembling operation is troublesome.

[0006] An object of the present invention is to facilitate assembly work and disassembly work.

[0007]

An object of the present invention is to provide a ventilation blower which is installed in an air flow path inside a box and has a motor whose rotation axis is horizontal and a vertical or horizontal direction of the box. And a plate for covering the opening, and at least two openings provided for ventilation in the box and the lid. Can be achieved by:

[0008] Here, the expression "number 2" of the "two openings" is a case where one box is provided with one ventilation blower. In this case, the ventilation blower is an air supply blower or an exhaust blower. If one box is provided with two air flow paths, that is, an air supply blower and an exhaust blower, the number of openings is four.

In some cases, the opening is provided in the plate, and at least one of the openings can be an opening (covered with a plate) for inserting a ventilation blower.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described below with reference to FIGS. First, an outline of a procedure for manufacturing a ventilation device will be described with reference to FIG.

The motor 55 is fixed to the gantry 50 (step S10).

On both sides of a motor 55 fixed to the gantry 50,
Blower exhaust casing 61, air supply casing 71
Is mounted (step S20).

The impellers 63 and 73 are mounted on both shaft ends of the electric motor 55 (step S30).

Each of the exhaust casing 61 and the air supply casing 71 has an exhaust suction pipe 64c and an air suction pipe 7c.
4c is attached. (Step S40).

The integrated product manufactured in the steps S10 to S40 is called a blower.

The blower is mounted inside a silencer box 100 having a supply channel and an exhaust channel. Electrical wiring to the blower. Further, the opening into which the blower is inserted is closed with the lid 150. Also, do other final work,
Complete (step S50).

Next, the configuration of each part for the above-described manufacturing steps will be described.

Step S10: In FIGS. 2 and 3,
A double-shaft type electric motor 55 is fastened on the gantry 50 with screws. The axis of the motor 55 is horizontal. The gantry 50 is configured by combining a flat plate and a channel material. When viewed from above, the end of the gantry 50 projects beyond the electric motor 55. Thus, the gantry 50 can be inserted into the silencer box 100 and fastened with screws from above. The gantry 50 has screw holes or nuts, and the motor has holes for screws. As described above, a screw fastening portion described later has a screw hole in one member and a hole in the other member.

Step S20: In FIGS. 4 and 5,
At both ends of the electric motor 55, a casing 61 of an exhaust blower,
The air supply casings 71 are respectively installed. This blower is a sirocco fan.

First, the lower portions of the casings 61 and 71 of the blower are fixed to the gantry 50. In the casings 61, 71, brackets 65, 66, 7
There are 5,76. The brackets 65 and 75 are fastened to the upper surface of the gantry 50 with screws from above.

Next, the casings 61 and 71 are
It is fastened to the end bracket of the electric motor 55 via screws 8 and 78. The plates of the casings 61 and 71 on the motor 55 side are fastened. This fastening is performed from the opening 61b (71b is not shown) for the impeller insertion of the casings 61 and 71. The air outlets 62, 72 of the casings 61, 71 have flanges 62b, 72b projecting in four directions. In particular,
Flange 72b is required.

Next, the upper brackets 66, 76 of the casings 61, 71 are connected by a rigid connecting member 67 from above. Connection is performed by fastening from above with screws.

Step S30: In FIGS. 6 and 7,
Impellers 63 and 73 are attached to both shaft ends of the electric motor 55.
This is the opening 61 of the casing 61, 71 on the suction port side.
b. The opening 61b is larger than the outer diameter of the impellers 63 and 73.

Step S40: In FIGS. 8 to 9,
Members 64 and 74 for the suction port are attached to the casings 61 and 71 on the plate on the suction port side. Describing the suction port member 64, the flange 6 covering the opening 61b will be described.
4b and a suction pipe 64c. The flange 64b is fastened to the casing 61 with a screw. The suction pipe 64c has an enlarged suction side. The same applies to the member 74.

Step S50: This will be described with reference to FIGS. The one obtained in step S40 is referred to as a blower. This blower is connected to the silencer box 100
Insert through the opening on the upper surface of and secure. The electric motor 5
5, and the opening is covered with a lid 150. Further, the exhaust duct unit 180 is connected.

In FIG. 10, the ventilation device includes a silencer box 100 containing a blower and an exhaust duct unit 180.
Consists of On the upper surface of the silencer box 100, an outlet 136 of the air supply flow path is provided. An inlet 131 for an air supply passage is provided on the back surface of the silencer box 100. An exhaust duct unit 180 is fixed to the right side of the silencer box 100. On the upper surface of the exhaust duct unit 180, there is an inlet 191 for an exhaust passage. The openings 136 and 191 are connected to the passenger compartment of the vehicle body via a duct. Around the openings 136 and 191, there are screw holes for connection to a duct on the vehicle body side. An exhaust channel outlet 196 is provided on the right side surface of the exhaust duct unit 180. 10
Reference numeral 6 denotes a gantry for hanging from a vehicle body.

11 to 22, the silencer box 100 includes a silencer box and a lid 150. Lid 15
Numeral 0 closes the upper surface of the silencer box 100.
The lid 150 is fastened to the upper part of the silencer box 100 with a screw.

The silencer box 100 is a box made of four metal pieces. It has a bottom but an open top. This box is partitioned by a partition plate to form an exhaust passage and an air supply passage. The silencer box 100 has inlets 121 and 131 and outlets 126 and 136 for the respective air flow paths. The entrance 121 and the exit 126 of the exhaust passage are in the silencer box 1
00 is open on the right side plate. Inlet 1 of air supply channel
31 is open at the back and outlet 136 is at the top, ie lid 1
It is open to 50. The upper surface of the lid 150 is a metal plate. The left side of the silencer box 100 is an air supply passage, and the right side is an exhaust passage.

The exhaust passage comprises a passage 122 from the front side to the back side of the silencer box 100, and a passage 123 along the back side. Air from the exhaust blower is discharged to the front side. The flow channel 122 and the flow channel 123 are separated by a partition plate 115. The opening from the flow path 122 to the flow path 123 is at the lower part of the silencer box 100. The channel 123 is the outlet 12
6 is connected.

The exhaust flow path and the air supply flow path are divided into right and left by a partition plate 110. The partition plate 110 extends from near the front side to the rear plate. The partition plate 110 has an opening 133 at the entrance to the air supply blower. Partition plate 110
Are provided between the front side and the front side. The plate 116 has an opening facing the outlet 72 of the air supply blower. The partition plate 117 partitions the inside of the front side into right and left. The air supply channel is partitioned into an inlet-side channel 132 and an outlet-side channel 134 by a partition plate 119.

The walls forming the exhaust passage and the supply passage, that is, the inner surface of the plate of the silencer box 100, the partition plate 11
A sound absorbing material 108 is attached to the inner surface of the plate of the lid 150 such as 0, 115, 116, 117, 119, etc., to form a silencer. The corners of the air flow path are arc-shaped. The outer surface of the sound absorbing material is appropriately covered with punching metal.

The silencer box 100 has a bottom, and a stand 105 on which the stand 50 is mounted is provided on the upper surface of the bottom plate. The sound absorbing material 108c is also provided below the electric motor 55. Casings 61 and 71 are located on both sides of the gantry 105.

The lid 150 is placed on the recessed flange on the upper surface of the silencer box 100 and fastened with screws from above.

The assembling procedure will be described. First, the blower obtained in step S <b> 40 is inserted into silencer box 100 having no lid 150, and mounted on gantry 105. Stand 50
Is fastened to the base 105 with screws from above. The blower has its rotation axis oriented in the left-right direction. The outlets 62, 72 of each blower face the front side. It is good to put on via a rubber cushion. Further, the electric wire 107 is connected to the electric motor 55.
To the terminal block. The electric wire 107 is previously placed in the silencer box 1
00 is passed through.

When the blower is inserted into the silencer box 100, the tips of the suction pipes 64c and 74c mesh with the partition plates 111 and 112 having semicircular concave portions. Partition plate 111
Is installed on the inner side (blower side) of the plate on the right side of the silencer box. The partition plate 112 is installed on the partition plate 110. The partition plate 112 is located closer to the blower than the partition plate 110 is.

The partition plate 111 will be described. The cross section of the semicircular recess has a U-shaped groove. A buffer member 113 having a U-shaped cross section is arranged in the groove. The tip of the suction pipe 64c contacts the cushioning material 113. The partition plate 111 above the semicircular concave portion has a trapezoidal shape. A buffer member 113b having a U-shaped cross section is also arranged in the trapezoidal portion. Partition plate 1
The same applies to 12.

Next, the lid 150 is fastened to the silencer box 100 with screws from above. The channel 12 is provided on the lower surface of the lid 150.
2, 123, 132, 134, etc., and a sound absorbing material facing them is arranged. A cushioning material is disposed at a position facing the partition plates 110, 115, 116, 117, etc., to prevent air leakage.

On the lower surface of the lid 150, partition plates 111, 11
The partition plates 161 and 162 that close the second opening are suspended. The partition plate 161 will be described.
The lower end of 61 is a semicircular concave portion that contacts the upper semicircular portion of the suction pipe 64c. This recess has a U-shaped groove. A U-shaped cushioning material 113 is arranged in the groove. The tip of the suction pipe 64c contacts the cushioning material 113. Further, the left and right sides of the concave semicircular portion 121b are expanded in a trapezoidal shape in accordance with the partition plate 111. The trapezoid contacts the cushioning material 113b.
The same applies to the partition plate 162.

The position where the blower is inserted into the silencer box 100 is the exhaust passage 122. The electric motor 55, the exhaust blower, and the air supply blower are located in the exhaust passage 122. The outlet 62 of the exhaust blower is located in the exhaust passage 122.

The flange 72 b of the mouth 72 of the air supply blower is provided with a partition plate 1 for separating the exhaust passage 122 and the air supply passage 130.
Touch 16 A cushioning material is arranged between the two. The blower is pressed against the front side of the silencer box 100 so that the flange 72b and the partition plate 116 are in contact with each other, and the gantry 50 is fastened to the gantry 105.

Next, the exhaust duct unit 180 is fixed to the plate on the right side of the silencer box 100 with screws.

In FIG. 11, FIG. 23 and FIG. 24, the exhaust duct unit 180 is a box of four strokes, and its six surfaces are covered with plates. A mounting flange is provided on the outer periphery at the left end. The exhaust duct unit 180 is connected to the intake passage 19.
2 and an exhaust passage 196. An entrance 191 of the intake passage 192 is opened on the upper surface. Exhaust passage 19 on the right side
6 has an outlet 197. An outlet 193 of the intake channel 192 and an inlet 195 of the exhaust channel 196 are opened on the left side. The outlet 193 is the intake pipe 64 of the exhaust blower.
c.

The outlet 193 comes into contact with the partition plates 111 and 161 via a buffer material. Entrance 195 of exhaust passage 196
Faces the outlet 126 of the exhaust passage. Entrance 195
Is in contact with the plate on the right side of the silencer box via the cushioning material. Therefore, the outlet 193 protrudes more toward the silencer box 100 than the entrance 195.

The air passage 19 of the exhaust duct unit 180
A sound absorbing material is installed on the wall surfaces of 2,196. The sound absorbing material is provided on the six plates of the exhaust duct unit 180 and the flow path 19.
2 and a flow path 196 are installed on a partition plate that separates the flow path 2 and the flow path 196. After arranging the sound absorbing material inside, the plate on one surface is fixed to obtain an exhaust duct unit 180.

The exhaust air from the inlet 191 is
2. It reaches the exhaust blower via the intake pipe 64c. Here, the pressure is increased and discharged to the front side of the flow channel 122. Channel 12
The exhaust air cools the motor 55 because the motor 2 has the motor 55. Then, the air is discharged to the outside via the flow paths 123 and 196.

The fresh air entering from the inlet 131 passes through the flow path resistor 140 and the flow path 132 to reach the air supply blower from the supply pipe 74c. Here, the pressure is increased and discharged to the front side of the flow path 134, and reaches the outlet 136 from the flow path 134.
The flow path resistor 140 changes the opening degree of the air flow path. By changing the opening, the amount of air entering the vehicle is determined, and the pressure in the vehicle is set to a predetermined value. The opening is set from the entrance 131.

According to this configuration, the blower can be assembled entirely from above or from the side. Also,
If you insert the blower into the silencer box 100 from above,
It can be assembled. Therefore, assembly can be easily performed.

Further, since the box is provided with a sound absorbing material to form a silencer, low noise can be achieved.

Further, disassembly for maintenance work can be performed by removing the cover 150 after removing the ventilation device from the vehicle body, and pulling out the air blower upward.

Next, the blower is placed horizontally, the members 64 and 74 of the suction port are removed, and the impellers 63 and 73 are cleaned. This cleaning may be performed by removing the impellers 63 and 73 from the shaft. In addition, the replacement of the bearing
1, 71 can be removed from the end bracket of the electric motor 55 and the end bracket can be removed.

As described above, the maintenance work does not need to be performed by inverting the heavy-weight blower upside down, and can be easily performed.

The silencer box 100 has two openings for air supply and exhaust, and therefore requires four openings. However, this opening can also be used as an opening for inserting the blower. In the above embodiment, the outlet 136 of the air supply flow path is also provided on the lid 150, also serving as an opening for inserting the blower.
Further, the outlet 126 of the exhaust passage can be provided with the lid 150.
Thus, the silencer box 100 only needs to have four openings for air supply and exhaust, and need not have four in the box before the cover 150 is covered.

The blower rotates at high speed. For this reason, the casing of the blower may be vibrated. Casing 6
1, the lower part of 71 is fixed to the gantry 50, and the casing 61,
Since the upper portions of 71 are fixed by the plurality of connecting members 67, rigidity can be improved and vibration can be suppressed.

An opening into which the blower can be inserted is provided inside the lid 150, and this can be covered with the second lid. The partition plates 161 and 162 are installed on the second lid. According to this, the partition plates 161 and 162 are connected to the partition plate 11.
1, 112 can be easily aligned.

The outlet 72 of the air supply blower and the partition plate 116
Between the intake pipe 64c (74c) and the partition plate 11
1, 161 (112, 162).

Further, the flange 72b of the outlet 72 can be provided slightly downward, and the partition plate 116 can be provided slightly upward, so that the two can be connected via a buffer material.

The partition plates 112 and 162 can be omitted. An entrance 133 is opened in the partition plate 110. The flange of the suction port of the intake pipe 74c is brought into contact with the partition plate 110 via the cushioning material. This contact is made with the motor 5
5 is pressed against the partition plate 110 side. When the flange 72b of the outlet 72 of the exhaust blower is in contact with the partition plate 116, the electric motor 55 is pressed to the left and the front.

The partition plates 111 and 161 can be made unnecessary.
An entrance 121 is opened in a plate on the right side of the silencer box 100. The member of the outlet 193 of the exhaust duct unit 180 is brought into contact with the flange of the intake pipe 64c via the cushioning material. This contact is performed by fixing the exhaust duct unit 180 to the silencer box 100. If the outlet 193 is projected, the thickness of the cushioning material can be reduced.

Similarly to the exhaust duct unit 180, a unit having flow paths 132 and 134 is connected to the silencer box 100.
Can be a separate unit.

The embodiment shown in FIG. 25 will be described. The motor 55 is inside the air flow path for cooling. For this reason, the connecting member 67b may be formed in an arc shape along the housing of the electric motor 55 so that air flows along the electric motor 55. The sound absorbing material 108b (shown in FIG. 19) of the lid 150 is disposed close to the upper surface on the front side of the connecting member 67b. This reduces the amount of air flowing on the upper surface of the connecting member 67b, increases the amount of air to the electric motor 55 side, and effectively cools. The width of the sound absorbing material 108b is the casing 61,
It is about the length between 71.

Except for the flow path 196 of the exhaust duct unit 180, the air can be directly discharged from the silencer box 100 to the atmosphere. Further, the flow passages 192 and 196 of the exhaust duct unit can be provided in the silencer box 100 as if the air supply passage was provided in the silencer box 100.

In the above embodiment, a blower is installed at each of the two shaft ends of one electric motor.
The present invention can also be applied to a case where two blowers are provided.

A device for controlling the electric motor 55, for example, an inverter can be installed in the air flow path for cooling. For example, it is installed on the lid 150.

The embodiment shown in FIG. 26 will be described. This figure is a longitudinal sectional view in a state where the blower is pulled out downward. In this embodiment, an opening for inserting a blower is provided on the lower surface of the silencer box 200. Other configurations are the same as those of the above embodiment. However, the exhaust duct unit 18 connected to the right side
0 is not shown. During maintenance work, the exhaust duct unit 180 is removed, and then the blower is pulled downward. Silencer box 200 remains attached to body 250.

The frame 50 of the blower is a silencer box 200
Is installed on a plate (lid) 210 that covers the opening on the lower surface of the. The plate 210 is firmly configured. The plate 210 is fixed to the silencer box 200.

In the above embodiment, the blower is moved in the vertical direction, but it may be moved in the horizontal direction and stored. If the moving direction is the axial direction, the connection between the suction port and the outlet of the blower can be simplified. In this case, the outlet of the blower should be slightly directed in the moving direction. Further, it is preferable that the electric motor moves along the rail.

In the above embodiment, one electric motor is combined with two blowers and one silencer box. However, one electric motor can be combined with one silencer box. In this case, one silencer box only needs to have two openings for ventilation as a result. When inserting from the horizontal direction, the outlet of the blower is provided facing the insertion direction (back side), and the outlet of the blower is brought into contact with the partition plate by inserting.

The technical scope of the present invention is not limited to the language described in each claim or the language described in the section for solving the problem, and is easily replaced by those skilled in the art. It extends to a range.

[0069]

According to the present invention, the assembling work and the disassembling work can be facilitated.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure for manufacturing a ventilation device according to an embodiment of the present invention.

FIG. 2 is a front view in which an electric motor is mounted on a gantry.

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a front view in which a casing of a blower is installed in the electric motor of FIG. 2;

FIG. 5 is a right side view of FIG. 4;

FIG. 6 is a front view in which an impeller is installed in the blower of FIG. 4;

FIG. 7 is a right side view of FIG. 6;

FIG. 8 is a front view in which an intake pipe is installed in the blower of FIG. 6;

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a plan view of a ventilation device according to an embodiment of the present invention.

FIG. 11 is a plan view of the ventilation device of FIG. 10 with a lid removed.

FIG. 12 is a sectional view taken along line 12-12 of FIG. 11;

FIG. 13 is a sectional view taken along a line 13-13 in FIG. 11;

FIG. 14 is a sectional view taken along line 14-14 of FIG. 11;

FIG. 15 is a sectional view taken along line 15-15 of FIG. 11;

FIG. 16 is a sectional view taken along line 16-16 of FIG. 15;

17 is a sectional view taken along line 17-17 in FIG. 15;

18 is a sectional view taken along line 18-18 in FIG.

FIG. 19 is a longitudinal sectional view of the lid of FIG. 10;

FIG. 20 is a sectional view of a joint between the silencer box and the lid in FIG. 10;

FIG. 21 is a sectional view taken along line 21-21 of FIG. 11;

FIG. 22 is a plan view of a silencer box.

FIG. 23 is a horizontal sectional view of the exhaust duct unit of FIG. 10;

FIG. 24 is a left side view of FIG. 23.

FIG. 25 is a right side view of another embodiment of the blower.

FIG. 26 is a longitudinal sectional view showing a disassembled state of a ventilation device according to another embodiment of the present invention.

[Explanation of symbols]

55: electric motor, 61, 71: casing of blower, 6
2, 72: exit, 63, 73: impeller, 64c, 74
c: intake pipe, 67: connecting plate, 100: silencer box, 1
05, 106: gantry, 122, 123, 192, 19
6: exhaust passage, 132, 134: air supply passage, 131: fresh air inlet, 136: fresh air outlet, 191: exhaust inlet, 197: exhaust outlet

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Koji Okada 7-1-1, Higashi Narashino, Narashino-shi, Chiba Industrial Equipment Division, Hitachi, Ltd. In the Kasado factory of Hitachi, Ltd.

Claims (25)

[Claims] 1. Inserting a ventilation blower with an electric motor from the vertical or horizontal direction into the air flow path of a box, which can eventually have at least two openings for ventilation, With the rotation axis oriented in the horizontal direction,
A method for manufacturing a ventilation device, comprising: fixing to the box; and covering the inserted opening with a plate. 2. The method for manufacturing a ventilation device according to claim 1, wherein the ventilation blower is inserted from above the box and fixed from above, and then the ventilation blower is inserted into an upper surface of the box into which the ventilation blower is inserted. Covering the opening with the plate. 3. The method according to claim 1, wherein the ventilation blower is inserted from a lower surface of the box with the ventilation blower mounted on the plate. Production method. 4. The method for manufacturing a ventilation device according to claim 1, wherein the ventilation blower is inserted from a horizontal direction in an axial direction of a rotating shaft. 5. The method for manufacturing a ventilation device according to claim 1, wherein said box is provided with a sound absorbing material in advance on a wall surface of said air flow path. 6. The method for manufacturing a ventilation device according to claim 1, wherein the ventilation blower is provided with an exhaust blower and an air supply blower at each end of one electric motor, and the electric motor is one of the air blowers. The method of manufacturing a ventilating device, wherein the insertion is performed so as to be positioned in a flow path. 7. The method for manufacturing a ventilation device according to claim 1, wherein after attaching the ventilation blower to the box, a duct is attached to a side surface of the box. A method for manufacturing a ventilating device, comprising contacting a suction port of an intake pipe of a ventilation blower. 8. The method of manufacturing a ventilation device according to claim 7, wherein the duct has two air passages, and when the duct is attached to the box, one of the air passages is used for the ventilation. A method for manufacturing a ventilation device, comprising: contacting a suction port of an intake pipe of a blower; and bringing the other air flow path into contact with an air flow path from the blower. 9. The method for manufacturing a ventilation device according to claim 1, wherein the ventilation blower has an exhaust blower and an air supply blower at each end of one electric motor, and the suction port of one of the blowers is provided. Is brought into contact with a partition plate in the box to fix the ventilation blower. Next, a duct is attached to a side surface of the box. At this time, an air flow path of the duct is connected to an intake pipe of the ventilation blower. Contacting the suction port of the ventilator. 10. The method for manufacturing a ventilation device according to claim 1, wherein an outlet of the ventilation blower is inserted in an insertion direction, the ventilation blower is attached to the box, and a duct is attached to a side surface of the box. At this time, an air flow path of the duct is brought into contact with a suction port of an intake pipe of the ventilation blower. 11. A ventilation blower installed in an air flow path inside a box and having a motor whose rotation axis is horizontal, and provided on a vertical or horizontal surface of the box, A ventilator comprising: an opening into which a blower is inserted; a plate covering the opening; and at least two openings provided for ventilation in the box and the lid. 12. The ventilator according to claim 11, wherein the upper surface of the box has the opening through which the ventilation blower can be inserted, and the plate is on the upper surface of the box. 13. The ventilation device according to claim 11, wherein the lower surface of the box has the opening through which the ventilation blower can be inserted, the plate is located on the lower surface of the box, and the motor is placed on the lower surface of the box. Features ventilation equipment. 14. The ventilating apparatus according to claim 11, wherein the ventilating blower has the opening and the plate on a surface in an axial direction of a rotating shaft. 15. The ventilation device according to claim 11, wherein a sound absorbing material is disposed on a wall surface of the air flow path in the box. 16. The ventilation device according to claim 11, wherein a duct is attached to a side surface of the box, and an air flow path of the duct is in contact with a suction port of the ventilation blower. . 17. The ventilation device according to claim 16, wherein said duct has two ducts, one of said ducts is attached to one side of said box, and said other duct is opposite to said one side. The ventilation device, which is attached to a side surface of the. 18. The ventilation device according to claim 11, wherein a duct having two air flow paths is attached to a side surface of the box, and one downstream end of the air flow path is in contact with a suction port of the ventilation blower. The other air passage is in contact with another opening of the side surface of the box. 19. The ventilator according to claim 11, wherein a casing of the ventilation blower is fixed to an end bracket of the electric motor, and a member of an air suction port of the ventilation blower is provided from an impeller of the ventilation blower. Also has a large diameter and is provided detachably on the casing. 20. The ventilation device according to claim 11, wherein the ventilation blower has an exhaust blower and an air supply blower at each end of one motor, and the motor has one air passage. A ventilator, which is installed in a ventilator. 21. The ventilation device according to claim 11, wherein the ventilation blower has an exhaust blower and an air supply blower at each end of one motor, and the suction port of one of the blowers is connected to the box. And a suction port of the other blower is in contact with an air flow path of a duct provided on a side surface of the box. 22. The ventilator according to claim 11, wherein each of the blowers has an intake pipe protruding in a horizontal direction, and the box below at least one intake pipe has a semicircle in contact with a lower surface of the intake pipe. A ventilating device, comprising: a semi-circular partition plate, wherein the semi-circular partition plate is in contact with the upper surface of the intake pipe, facing the semi-circular partition plate. 23. The ventilation device according to claim 11, wherein the ventilation blower has an exhaust blower and an air supply blower at each end of one motor, and the casing of each of the blowers is the motor. Wherein the one casing and the other casing are rigidly connected to each other. 24. The ventilation device according to claim 23, wherein a lower portion of each of the casings is fixed to a mount on which the electric motor is mounted. 25. The ventilation device according to claim 23, wherein the rigid body is continuous along the electric motor.