JP7412375B2 - Blower - Google Patents

Description

The present disclosure relates to a blower equipped with a crossflow fan.

BACKGROUND OF THE INVENTION Many railway vehicles are equipped with a blower equipped with a cross-flow fan as disclosed in Patent Document 1 in order to improve the environment in the interior of the vehicle where a large number of people are accommodated. Air blowers are used to improve the environment inside a car by blowing air on the passengers, giving them a cool feeling, and evening out the temperature distribution inside the car.

Patent No. 3777726

In recent years, there has been increasing interest in health problems caused by dust such as PM2.5, and there is a desire to improve the environment inside cars by reducing dust. However, although the blower disclosed in Patent Document 1 can blow air toward the interior space of a vehicle, it cannot remove dust from the interior space of the vehicle. Furthermore, even if it is attempted to provide an air purifying device separately from the blower, it is difficult to provide space and structure for installing the air purifying device in the existing railway vehicle interior.

The present disclosure has been made in view of the above, and aims to provide a blower that can remove dust even from existing railway vehicles.

In order to solve the above-mentioned problems and achieve the purpose, the blower consists of a motor, an impeller attached to the output shaft of the motor, and a blower that surrounds the impeller and is oriented in a direction perpendicular to the output shaft. A fan casing is provided with a suction port that is opened in a direction opposite to the direction in which the suction port faces and a blowout port that is opened in a direction that is perpendicular to the output shaft, and a fan casing that is provided opposite to the suction port. An air purifying device.

According to the present disclosure, it is possible to obtain an air blower that can remove dust even from existing railway vehicles.

A perspective view of a blower according to Embodiment 1 A cross-sectional view of the blower according to Embodiment 1 taken along a plane perpendicular to the output shaft. A perspective view of an air purifying device in Embodiment 1 A perspective view showing the internal configuration of the high voltage unit in Embodiment 1 Circuit diagram of high voltage unit in Embodiment 1 Cross-sectional view of an air cleaning device according to a modification of Embodiment 1 A diagram of an air purifying device according to another modification of Embodiment 1 seen from the suction port side.

Below, a blower according to an embodiment will be described in detail based on the drawings.

Embodiment 1.
FIG. 1 is a perspective view of a blower according to a first embodiment. FIG. 2 is a cross-sectional view of the blower according to the first embodiment taken along a plane perpendicular to the output shaft. In FIG. 1, the housing 21 shown in FIG. 2 is omitted. The blower 20 includes a motor 3, an impeller 2, a fan casing 1, a housing 21, and an air purifier 9. The motor 3 rotates a driven object around an output shaft 3a.

The impeller 2 is a driven object that is rotated by the motor 3 around an output shaft 3a. The impeller 2 has a plurality of blades arranged on a circumference centered on the output shaft 3a. In the blower 20, impellers 2 are provided on both sides of the motor 3.

The fan casing 1 surrounds the impeller 2 . A suction port 22 is formed in the fan casing 1 and is opened in a direction perpendicular to the output shaft 3a. The fan casing 1 is formed with an air outlet 23 that opens in a direction different from the direction in which the suction port 22 faces and in a direction perpendicular to the output shaft 3a. The opening area of the suction port 22 is larger than that of the air outlet 23. The fan casing 1 includes a guide plate 5 and a guide plate 6 provided with a suction port 22 and a blowout port 23 interposed therebetween.

The motor 3, the impeller 2, and the fan casing 1 form a cross-flow fan that sucks in air from an inlet 22 and blows out air from an outlet 23 by rotating the impeller 2. The motor 3, impeller 2, and fan casing 1 are housed in a rectangular parallelepiped-shaped housing 21. An air inlet/outlet 24 is formed on one side of the casing 21 . The air inlet/outlet 24 is an opening formed in the casing 21 , and air enters and exits the interior of the casing 21 through the air inlet/outlet 24 .

That is, the air sucked in from the suction port 22 of the fan casing 1 by the rotation of the impeller 2 described above flows into the housing 21 as the suction flow 7 through the air inlet/outlet port 24 . Air blown out from the air outlet 23 of the fan casing 1 by the rotation of the impeller 2 is blown out from the housing 21 as an air flow 8 through the air outlet 24.

Air cleaning device 9 is provided inside casing 21 . The air purifier 9 is provided facing the suction port 22 of the fan casing 1 . A part of the air sucked in from the suction port 22 passes through the air purifier 9, and thus purified air is blown out from the blowout port 23.

FIG. 3 is a perspective view of the air cleaning device in the first embodiment. The air purifier 9 includes a high voltage unit 12. FIG. 4 is a perspective view showing the internal configuration of the high voltage unit in the first embodiment. In FIG. 4, the internal structure of the high voltage unit 12 is shown with the outer shell 15 shown in FIG. 3 removed. FIG. 5 is a circuit diagram of the high voltage unit in the first embodiment.

The high voltage unit 12 has a discharge electrode 13, a counter electrode 14, and an outer shell 15. The outer shell 15 is made of resin. The discharge electrode 13 is a wire-shaped and strong electrical conductor. The counter electrode 14 is an electrical conductor. An example of the material for the discharge electrode 13 is tungsten, but the material is not limited thereto. The discharge electrode 13 and the counter electrode 14 are made of a material that does not easily rust with water so that they can be washed with water when dust is attached. As shown in FIG. 5, the high voltage unit 12 has a structure in which counter electrodes 14 are arranged to sandwich a discharge electrode 13 from both sides. In the high voltage unit 12, a high voltage is applied between the discharge electrode 13 on the voltage side and the counter electrode 14 on the ground side to generate a corona discharge and an electrolytic space. As a result, dust, which is floating particles in the air, is charged by corona discharge, and the charged dust is collected by Coulomb force. Note that the air purifying device 9 is exemplified by the above-mentioned electric air purifying device, but it may be one that purifies the air using other methods such as a filter.

Note that the air purifier 9 is installed at a position facing the suction port 22 of the fan casing 1, that is, the air purifier 9 is installed upstream of the impeller 2 in the air flow when the impeller 2 rotates. Thus, it is possible to purify the air in the space where the blower 20 is provided while suppressing a decrease in the blowing performance of the blower 20 due to the provision of the air purifier 9.

The opening area of the outlet 23 is smaller than that of the inlet 22. Therefore, the wind speed of the air blown out from the blow-off port 23 is higher than the wind speed of the air sucked in by the suction port 22. Therefore, if the air purifier 9 is installed at a position facing the outlet 23, that is, downstream of the impeller 2, the influence of pressure drop when passing through the air purifier 9 will be large, and the blowing performance will be impaired. Cheap. Further, when an electric air purifier is used as the air purifier 9, the smaller the wind speed passing through the air purifier, the higher the dust collection effect and the higher the cleaning effect. Therefore, it is preferable to arrange the air cleaning device 9 upstream of the impeller 2 also from the viewpoint of the cleaning effect.

Furthermore, by providing the air purifying device 9 inside the housing 21 of the blower 20, the air can be purified, so even when installed in a railway vehicle, the air purifying device 9 is provided in the interior space of the train. No additional space or structure is required. Therefore, it becomes easy to install the air purifier 9 for purifying the air even in existing railway vehicles. By preparing a blower 20 that is compatible with the blowers already installed in railway vehicles in terms of external dimensions, power supply, etc., and also has a built-in air purifier, it is possible to replace the blowers currently installed with this implementation. The air blower 20 equipped with the air cleaning device 9 according to the first embodiment can be easily replaced.

FIG. 6 is a sectional view of an air cleaning device according to a modification of the first embodiment. In the air purifying device 9 for the blower 20 according to the modified example, a first shielding plate 10 that protrudes toward the opening edge of the suction port 22 of the fan casing 1 is formed on the outer shell 15. The first shielding plate 10 is provided along the edge of the surface of the outer shell 15 that faces the suction port 22 and is close to the air inlet/outlet 24 . A plate surface 10a of the first shielding plate 10 is directed toward the air inlet/outlet 24 of the housing 21.

By installing the first shielding plate 10, air passes through the gap between the air purifier 9 and the suction port 22 and is sucked into the suction port 22, that is, air is sucked into the suction port 22 without passing through the air purifier 9. The amount of air can be reduced. This makes it possible to increase the amount of air passing through the air purifier 9 and collect more dust. Further, by changing the amount of protrusion of the first shielding plate 10, the amount of air passing through the air purifier 9 can be adjusted. Thereby, air can be passed through at an air volume and speed suitable for the performance of the air purifier 9. Note that the amount of protrusion of the first shielding plate 10 may be fixed or variable. As a method for changing the amount of protrusion of the first shielding plate 10, for example, a method is provided in which a slide rail is provided on the outer shell 15 of the air purifier 9, and the first shielding plate 10 is slid on the slide rail portion to adjust the amount of protrusion. There is. By providing protrusions and depressions on the first shielding plate 10 and the slide rail, respectively, it becomes possible to adjust the slide position in several stages. Alternatively, the first shielding plate 10 that has been slid may be fixed by screwing it at an arbitrary sliding position.

Providing the first shielding plate 10 makes it difficult to access the air purifier 9 through the air inlet/outlet 24. When the blower 20 is installed in a railway vehicle, an unspecified number of people enter and exit the train. By making the air purifying device 9 difficult to access with the first shielding plate 10, it is possible to prevent tampering inside the train car where an unspecified number of people go in and out.

FIG. 7 is a diagram of an air cleaning device according to another modification of the first embodiment, viewed from the suction port side. In FIG. 7, the housing 21 is omitted. The air purifier 9 according to another modification includes a second shielding plate 11 that protrudes from the outer shell 15 in a direction parallel to the output shaft 3a and faces an opening region of the suction port 22 that does not face the air purifier 9. . The second shielding plate 11 protrudes from the outer shell 15, and the amount of protrusion is variable. By changing the amount of protrusion of the second shielding plate 11, the amount of air flowing into the air purifier 9 can be adjusted.

For example, if the blower 20 has two notches (strong and weak) and the rotation speed of the impeller 2 changes depending on the notches, the amount and speed of air passing through the air purifier 9 change depending on the notches. Therefore, if the amount of protrusion of the second shielding plate 11 is fixed, the air purifying ability of the blower 20 will change depending on the notch. When installing the blower 20 on a railway vehicle, it is desirable to clean the air in the winter when it is dry and dust tends to fly, but because it is cold, the blower 20 may be operated at a low notch. In this case, although the air purification ability is desired to purify the air, the air purification ability decreases. It is possible to suppress a decrease in the air purifying ability of the air cleaner. Note that the above example does not deny that the amount of protrusion of the second shielding plate 11 is fixed. As a method of changing the amount of protrusion of the second shielding plate 11, for example, a slide rail extending from the outer shell 15 of the air purifier 9 in a direction parallel to the output shaft 3a may be provided, and the second shielding plate 11 may be moved like an accordion curtain. As an extensible shape, it is possible to adjust the amount of protrusion by sliding it along the slide rail portion. By providing protrusions and depressions on the tip of the second shielding plate 11 and the slide rail, respectively, it becomes possible to adjust the slide position in several stages.

Although several examples have been given of cases in which the blower 20 is installed in a railway vehicle, the purpose of the explanation is to enable installation of an air purifying device to the blower at low cost. The present invention is not limited to blowers that are installed, but can also be applied to blowers that are used in vehicles other than railway vehicles.

Further, the blower 20 may further include a motor capable of rotating the fan casing 1 around the output shaft 3a to change the blowing direction.

Further, although an electric air purifying device has been described as an example of the air purifying device 9, other air cleaning methods such as a filter may be used. However, air purifying devices such as ion generators are not considered effective in large spaces such as railway vehicles. The ions emitted from the ion generator are spread throughout the vehicle space by riding on the airflow from the blower. Air purification by ion generation is achieved by colliding the emitted ions with dust and the like. If ions are concentrated and in a high concentration state, the probability of collision will be high, but since both ions and dust are small, if they are spread over a large space, the probability of collision will be very low, and there is a risk that the air purification effect will not be fully exerted. be. On the other hand, the electric air purifier 9 exemplified in the present disclosure collects and collects dust using the airflow of the blower 20, so it is effective as an air purifier in a space such as a railway vehicle.

The configurations shown in the embodiments above are merely examples, and can be combined with other known techniques, or can be combined with other embodiments, within the scope of the gist. It is also possible to omit or change part of the configuration.

1 fan casing, 2 impeller, 3 motor, 3a output shaft, 5, 6 guide plate, 7 suction flow, 8 outlet flow, 9 air purifier, 10 first shielding plate, 10a plate surface, 11 second shielding plate, 12 high voltage unit, 13 discharge electrode, 14 counter electrode, 15 outer shell, 20 blower, 21 housing, 22 suction port, 23 blowout port, 24 air inlet/outlet.

Claims (4)

motor and
an impeller attached to the output shaft of the motor;
a suction port provided surrounding the impeller and opening in a direction perpendicular to the output shaft; and an opening in a direction different from the direction in which the suction port faces and perpendicular to the output shaft. a fan casing formed with an air outlet;
an air purifying device provided opposite to the suction port;
a first shielding plate protruding from the air purifying device toward the opening edge of the suction port;
A blower characterized in that the amount of protrusion of the first shielding plate is adjustable . Claim 1, further comprising a second shielding plate that protrudes from the outer shell of the air purifying device in a direction parallel to the output shaft and faces an opening area of the suction port that does not face the air purifying device. The blower described in . The blower according to claim 2, wherein the amount of protrusion of the second shielding plate is adjustable. Any one of claims 1 to 3 , wherein the air cleaning device is an electric air cleaning device that has a discharge electrode and a counter electrode, and applies a voltage between the discharge electrode and the counter electrode. or the blower described in one of the above.

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