JP6021141B2 - Pump device - Google Patents

Description

  The present invention relates to a fan cover attached to an air blowing port and a pump device including the same.

  An oscillating piston pump, which is a type of vacuum pump, is known as a volumetric transfer pump that alternately performs intake and exhaust of air in a pump chamber by reciprocating movement of a piston in a cylinder. It is used.

  As this type of pump, a pump having a cooling mechanism for suppressing heat generation of a motor during operation is known. For example, the following Patent Document 1 discloses a pump having a fan blade attached to a shaft of a motor, an opening formed in the pump housing for sucking air by rotation of the fan blade, and a fan guard attached to the opening. Is described.

Special table 2003-515061 gazette

  In general, the fan cover is attached to the air outlet for the purpose of preventing intrusion of human fingers and foreign objects. On the other hand, the smaller the opening of the fan cover, the greater the resistance of the flow path, causing problems such as a decrease in pump cooling efficiency and noise generation.

  In view of the circumstances as described above, an object of the present invention is to provide a fan cover capable of reducing flow path resistance and a pump device capable of increasing the cooling efficiency of a motor.

In order to achieve the above object, a fan cover according to an aspect of the present invention is a fan cover attached to a blower opening, and includes an outer frame and a frame portion.
The outer frame can be attached to the air blowing port and defines a fluid flow path along a uniaxial direction.
The frame portion has a convex first surface projecting in the uniaxial direction and a concave second surface facing the first surface in the uniaxial direction, and is supported by the outer frame. The flow path is partitioned into a plurality of regions.

In order to achieve the above object, a pump device according to an embodiment of the present invention includes a pump body and a blower unit.
The pump body has a blower opening.
The air blowing unit includes a fan and a fan cover.
The fan is disposed at the air outlet.
The fan cover has an outer frame and a frame part. The outer frame is attached to the air blowing port and defines a fluid flow path along a uniaxial direction. The frame portion has a convex first surface projecting in the uniaxial direction and a concave second surface facing the first surface in the uniaxial direction, and is supported by the outer frame. The flow path is partitioned into a plurality of regions.

It is a perspective view showing the whole pumping device concerning one embodiment of the present invention. It is a longitudinal cross-sectional view of the principal part of the said pump apparatus. It is a front view of the fan cover of the said pump apparatus. It is sectional drawing of the AA direction in FIG. 3 of the said fan cover. It is a principal part enlarged view in FIG. 4A of the said fan cover. It is sectional drawing of the BB direction in FIG. 3 of the said fan cover. It is a principal part enlarged view in FIG. 5A of the said fan cover. It is principal part sectional drawing of the fan cover which concerns on a comparative example.

The fan cover which concerns on one Embodiment of this invention is a fan cover attached to a ventilation opening, Comprising: An outer frame and a frame part are comprised.
The outer frame can be attached to the air blowing port and defines a fluid flow path along a uniaxial direction.
The frame portion has a convex first surface projecting in the uniaxial direction and a concave second surface facing the first surface in the uniaxial direction, and is supported by the outer frame. The flow path is partitioned into a plurality of regions.

  Since each of the frame portions has a first surface protruding in the fluid flow direction, the resistance of the fluid passing through the flow path from the first surface side to the second surface side can be reduced. The concave second surface guides the movement of air along the rotation direction of the fan when the second surface is disposed to face the suction fan. Thereby, generation | occurrence | production of a turbulent flow can be suppressed and a wind noise can be reduced.

The fan cover may further include a support member having a joint portion joined to the frame portion and connecting the frame portion to the outer frame.
The support member holds the relative position between the frame portion and the outer frame, and can increase the mechanical strength of the fan cover.

The joint may have a convex portion continuous with the convex first surface.
Moreover, the said junction part may have a recessed part continuous with the said concave 2nd surface.
Thereby, the pressure fluctuation between the 1st surface of a flame | frame part and the surface of a junction part or a 2nd surface and the back surface of a junction part can be suppressed, and the prevention effect of wind noise generation can be heightened.

  The convex first surface is formed of, for example, a curved surface. Thereby, channel resistance can be reduced efficiently.

  The frame portion may be composed of a plurality of annular bodies arranged concentrically in a direction orthogonal to the uniaxial direction. Thereby, the flow of the air which moves in the rotation direction of the fan on the second surface can be efficiently induced, and the effect of preventing the generation of wind noise can be enhanced.

The outer frame, the frame portion, and the support member may be formed of a metal material that is integrally formed.
Thereby, while being able to form the frame part and support member of the said shape easily, productivity can be improved. Moreover, the heat resistance and strength of the fan cover can be improved.

The pump apparatus which concerns on one Embodiment of this invention comprises a pump main body and a ventilation unit.
The pump body has a blower opening.
The air blowing unit includes a fan and a fan cover.
The fan is disposed at the air outlet.
The fan cover has an outer frame and a frame part. The outer frame is attached to the air blowing port and defines a fluid flow path along a uniaxial direction. The frame portion has a convex first surface projecting in the uniaxial direction and a concave second surface facing the first surface in the uniaxial direction, and is supported by the outer frame. The flow path is partitioned into a plurality of regions.

  In the pump device, since the frame portion has a first surface protruding in the fluid flow direction, when the air moves from the first surface side to the second surface side by rotation of the fan, The resistance of the fluid passing through the flow path can be reduced. Thereby, the cooling efficiency of the motor can be increased. In this case, the concave second surface guides the movement of air along the rotation direction of the fan. Thereby, generation | occurrence | production of a turbulent flow can be suppressed and a wind noise can be reduced.

  The fan may be an inhalation fan. In this case, the fan cover is disposed so that the second surface and the fan face each other in the uniaxial direction. On the other hand, the fan may be a discharge fan. In this case, the fan cover is arranged such that the first surface and the fan face each other in the uniaxial direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Pump device]
FIG. 1 is a diagram showing a pump device according to an embodiment of the present invention.

  The pump device 1 of the present embodiment includes a first pump unit 11, a second pump unit 12, and a driving unit 13 that drives the first pump unit 11 and the second pump unit 12 in common.

  The first and second pump units 11 are each configured as a vacuum pump. However, the present invention is not limited to this, and both the pump units 11 and 12 may be configured as pressurizing pumps (pressurizing pumps). The pump device 1 is used, for example, as a gas pressure booster in a fuel cell system.

  The first and second pump portions 11 and 12 typically have a common configuration, and in this embodiment, are configured as a swinging piston pump. In addition, the first and second pump units 11 and 12 may be configured as other positive displacement pumps such as a diaphragm pump.

  The pump device 1 includes a pump body 10 and a blower unit 300. The pump body 10 includes a piston 21, a pump case 100, a motor M, and a conversion mechanism 200. The pump case 100 includes a first casing 101 constituting a part of the first pump part 11, a second casing 102 constituting a part of the second pump part 12, and a part of the drive part 13. And a third casing 103 to be configured.

  FIG. 2 is a vertical cross-sectional view showing a partial configuration of the first pump unit 11 and the drive unit 13. In FIG. 2, an X axis, a Y axis, and a Z axis indicate three axial directions that are orthogonal to each other. In addition, since the 2nd pump part 12 is comprised similarly to the 1st pump part 11, the 1st pump part 11 is mainly demonstrated here.

  The first pump unit 11 includes a first casing 101, a conversion mechanism 200, and a blower unit 300.

  The first casing 101 includes a case main body 110, a cylinder 111, a pump head 112, and a pump head cover 113. The case body 110, the cylinder 111, the pump head 112, and the pump head cover 113 are integrated with each other so as to be stacked in the Z-axis direction.

  The case main body 110 is connected to the third casing 103 that houses the motor M, and has a through hole 110h through which the connecting rod 210 passes. In addition, on one side surface of the case main body 110 where the blower unit 300 is disposed, a blower port 115 serving as an air suction port is formed. The blower opening 115 is a circular opening, and an engagement portion 115a for attaching a fan cover 32 described later is formed in part.

  The cylinder 111 is disposed between the case main body 110 and the pump head 112, and accommodates the piston 21 slidably in the Z-axis direction. The pump head 112 is disposed between the cylinder 111 and the pump head cover 113, and includes an intake valve 112a and an exhaust valve 112b. The pump head cover 113 is disposed on the pump head 112 and has an intake chamber 113a that communicates with the intake port 114a and an exhaust chamber 113b that communicates with the exhaust port 114b. As shown in FIG. 1, the intake port 114 a and the exhaust port 114 b are provided on the side surfaces of the pump parts 11 and 12 that face each other, and connect the pump parts 11 and 12 to each other.

  The piston 21 has a disk shape and is fixed to the first end 211 of the connecting rod 210 via a screw member 25. The piston 21 forms a pump chamber 26 between the piston 21 and the pump head 112. The piston 21 reciprocates in the Z-axis direction inside the cylinder 111, and performs a predetermined pump action by alternately sucking and exhausting the pump chamber 26 via the intake valve 112a and the exhaust valve 112b.

  The conversion mechanism 200 includes a connecting rod 210 and an eccentric member 220. The conversion mechanism 200 is connected to the drive shaft 131 of the motor M, and converts the rotation of the drive shaft 131 of the motor M into the reciprocating movement of the piston 21 inside the cylinder 111.

  The connecting rod 210, the piston 21, and the eccentric member 220 are connected to each other. The connecting rod 210 has a first end 211 connected to the piston 21 and a second end 212 connected to the eccentric member 220. The first end 211 is formed in a circular shape having substantially the same diameter as the piston 21. A disc-shaped sealing member 24 is attached between the piston 21 and the first end portion 211. The peripheral edge of the seal member 24 is bent to the side opposite to the pump chamber 26 side so as to be slidable on the inner peripheral surface of the cylinder 111.

  When the first pump 11 is configured as a pressurizing pump, the peripheral edge portion of the seal member 24 is bent toward the pump chamber 26 side.

  A fitting hole 213 for fitting with the eccentric member 220 is formed at the second end 212 of the connecting rod 210. A bearing B1 that rotatably supports the eccentric member 220 is mounted in the fitting hole 213. The bearing B <b> 2 is configured to rotatably support the drive shaft 131 of the motor M, and is fixed to the case body 110. The bearings B1 and B2 are formed of an annular ball bearing having an inner ring (inner race), an outer ring (outer race), and a plurality of rolling elements (spheres) enclosed between them.

  The eccentric member 220 has an eccentric shaft 221 and a counterweight 222. The eccentric member 220 is fixed to the drive shaft 131 by a fixing screw 223.

  The eccentric shaft 221 is formed eccentric with respect to the rotation center of the drive shaft 131. The counter weight 222 is for canceling vibration generated when the connecting rod 210 rotates about the eccentric shaft 221 due to the rotation of the drive shaft 131. Is arranged at a position biased in the opposite direction.

  The blower unit 300 includes a fan 31 and a fan cover 32. The blower unit 300 is configured to cool the pump device 1 during operation by introducing outside air (air) into the pump case 100 as the fan 31 rotates.

  The fan 31 is disposed at the air outlet 115 and is attached to the end 131 a of the drive shaft 131 protruding from the eccentric member 220. The fan 31 is configured as an air suction fan that rotates integrally with the drive shaft 131. That is, the motor M is used as a drive source for rotating the fan 31 and constitutes a part of the blower unit 300 together with the fan 31 and the fan cover 32.

  In addition, the 2nd pump part 12 side also has the ventilation unit of the structure similar to the ventilation unit 300, and the fan of the said ventilation unit is also comprised as a fan for air suction. Thereby, the cooling efficiency of the 2nd pump part 12 can be improved.

  As shown in FIG. 1, vent holes 116 a and 116 b are formed in the first and second casings 101 and 102. The vent hole 116a discharges the air sucked from the blower unit 300 on the first pump unit 11 side to the outside of the casing, and the vent hole 116b casings the air sucked from the blower unit on the second pump unit 12 side. Discharge outside.

[Fan cover]
Next, details of the fan cover 32 will be described.

  FIG. 3 is a front view of the fan cover 32. 4A is a cross-sectional view in the [A]-[A] line direction in FIG. 3, FIG. 4B is an enlarged view of the main part in FIG. 4A, and a cross-sectional view in the [B]-[B] line direction in FIG. 5B is an enlarged view of a main part in FIG. 5A.

  The fan cover 32 includes an outer frame 33, a plurality of frame portions 34, and a plurality of support members 35. The fan cover 32 is formed of a molded body of a metal material such as an aluminum alloy. The fan cover 32 is attached to the air outlet 115 so as to face the fan 31 in the Y-axis direction.

  The outer frame 33 is configured in an annular shape having substantially the same diameter as the blower opening 115, and has an annular fitting recess 33 a that can be attached to the peripheral edge of the blower opening 115 on the surface facing the fan 31. . The outer frame 33 defines an air flow path along the Y-axis direction that is sucked from the outside to the inside of the air blowing port 115 by an edge on the inner peripheral side thereof.

  The plurality of frame portions 34 divide the air flow path defined by the outer frame 33 into a plurality of regions. Each of the plurality of frame portions 34 is configured by a plurality of annular bodies having different diameters arranged around a disk portion 36 formed in the approximate center of the fan cover 32 (a region facing the drive shaft 131 in the Y-axis direction). Is done. That is, each frame part 34 is concentrically arranged in a radial direction that is a direction orthogonal to the Y-axis direction. In addition, since each frame part 34 is comprised in the same shape although magnitude | sizes differ, each code | symbol is attached | subjected and demonstrated.

  The disk portion 36 has a convex cross section so as to bulge outward from the pump device 1. Thereby, the flow resistance of the air which passes the disk part 36 can be reduced.

  The adjacent frame portions 34 are arranged at substantially equal intervals in the radial direction, and an opening S serving as a part of an air flow path is formed therebetween. The width in the radial direction of the opening S is regulated to a width that does not allow a human finger or the like to enter, for example, and is about 5 mm or less in the present embodiment.

  The frame part 34 has a front surface (first surface) 341 and a back surface (second surface) 342. The surface 341 of the frame portion 34 is formed in a convex shape that protrudes in the Y-axis direction. That is, the surface 341 has a top portion 341 a that passes through a substantially central portion in the radial direction, and is configured by a curved surface that is inclined from the top portion 341 a to each opening S. The curved surface may be spherical or aspherical, and the curvature is not particularly limited.

  On the other hand, the back surface 342 of the frame portion 34 is configured in a concave shape facing the front surface 341 in the Y-axis direction. The back surface 342 has a bottom portion 342a that passes through a substantially central portion in the radial direction, and is configured by a curved surface that inclines from the bottom portion 342a to each opening S. The back surface 342 is configured by a curved surface concentric with the convex shape of the front surface 341, for example.

  The frame portion 34 is disposed so that the back surface 342 faces the fan 31. Thereby, the air passing through the fan cover 32 on the first pump unit 11 side during the operation of the pump device 1 flows from the front surface 341 toward the back surface 342.

  The plurality of support members 35 are connected between the outer frame 33 and the plurality of frame portions 34. That is, the plurality of support members 35 respectively support the plurality of frame portions 34 and connect the plurality of frame portions 34 to the outer frame 33. The plurality of support members 35 respectively extend along the radial direction and are arranged at equal intervals around the Y axis. That is, they are arranged radially from the disk portion 36.

  Each support member 35 has a plurality of joint portions 350 joined to the plurality of frame portions 34. Since the support members 35 are joined to the plurality of frame portions 34 at substantially equal intervals along the radial direction, the joint portions 350 are formed at substantially equal intervals along the extending direction of the support member 35 that is the radial direction. The

  The joint portion 350 includes a convex surface 341 and a continuous convex portion 351 of the frame portion 34, a concave back surface 342 and a continuous concave portion 352 of the frame portion 34. The convex portion 351 and the concave portion 352 are configured by curved surfaces having the same shape as the front surface 341 and the rear surface 342 of the frame portion 34, respectively. The convex portion 351 has a top portion 351 a continuous with the top portion 341 a of the frame portion 34, and the concave portion 352 has a bottom portion 352 a continuous with the bottom portion 342 a of the frame portion 34. That is, in the joint portion 350, the front surface 341 and the back surface 342 of the frame portion 34 and the front surface and the back surface of the support member 35 are smoothly connected to each other, and the curved surfaces constituting the front surface 341 and the back surface 342 are continuous in the circumferential direction. The

  The fan cover 32 further includes an attachment portion 37, a pair of locking portions 38, and a pair of fixing portions 39.

  The attachment portion 37 is formed on a part of the outer frame 33 and is configured to be able to engage with an engagement portion 115 a formed on a part of the air blowing port 115. The pair of locking portions 38 are formed integrally with a part of the outer frame 33 and are configured to be locked in locking holes 117 (FIG. 1) formed in the vicinity of the air outlet 115 of the case body 110. The The pair of fixing portions 39 are formed integrally with a part of the outer frame 33, and have screw holes 391 through which screws 118 (FIG. 1) screwed into the air blowing ports 115 are inserted.

  The formation positions of the attachment portion 37, the locking portion 38, and the fixing portion 39 are not particularly limited. In this embodiment, the attachment portion 37 is formed at the lowermost portion of the fan cover 32 in FIG. 39 are formed at positions above the fan cover 32 that are symmetrical with respect to the Z-axis. The shape, the number, and the like of the attachment portion 37, the locking portion 38, and the fixing portion 39 are not particularly limited. For example, the locking portion 38 may be omitted as necessary.

  The fan cover 32 configured as described above is formed of a molded body of a metal material. The molding method may be a pressing method, a die casting method, or other molding methods. For example, aluminum or an alloy thereof is employed as the metal material, but iron, stainless steel, copper or an alloy thereof, magnesium or an alloy thereof, or other metal materials can be employed.

  By forming the fan cover 32 by a molding method, for example, the frame portion 34 on which the convex surface 341 and the concave back surface 342 are formed, and the support member 35 on which the convex portion 351 and the concave portion 352 are formed can be easily performed. In addition, it can be formed at the same time, and productivity can be improved.

  Further, since the fan cover 32 is made of metal, heat resistance and mechanical strength can be increased. Furthermore, since heat transfer characteristics are also improved, the heat dissipation of the pump case 100 can be improved.

[Second pump section]
The second pump unit 12 is configured in the same manner as the first pump unit 11. The second pump unit 12 is driven by a common motor M simultaneously with the first pump unit 11. The drive shaft 131 extends to the second pump unit 12 side and is connected to an eccentric shaft (not shown) of the second pump unit 12.

  In the present embodiment, the first pump unit 11 and the second pump unit 12 are driven with different phases. For example, the eccentric shafts of the pump parts 11 and 12 are set so that the piston of the second pump part 12 is located at the bottom dead center when the piston 21 of the first pump part 11 is located at the top dead center. Is done. The fan cover attached to the second pump unit 12 is arranged so that the back surface 342 of the frame unit 34 faces the fan, similarly to the fan cover 32 attached to the first pump unit 11.

[Operation of pump device]
Next, operation | movement of the pump apparatus 1 of this embodiment comprised as mentioned above is demonstrated. Here, the operation of the first pump unit 11 will be mainly described.

  By driving the motor M, the eccentric shaft 221 revolves around the drive shaft 131 along a circumference having a radius corresponding to the amount of eccentricity from the drive shaft 131. The connecting rod 210 connected to the eccentric shaft 221 converts the rotation of the drive shaft 131 into the reciprocating movement of the piston 21 inside the cylinder 111. That is, the piston 21 reciprocates in the Z-axis direction while swinging in the X-axis direction in FIG. As a result, the intake and exhaust of the pump chamber 26 are alternately performed, whereby a predetermined vacuum exhaust action by the first pump unit 11 is obtained.

  When the pump device 1 is driven, the fan 31 of each pump unit rotates integrally with the drive shaft 131. Thereby, air outside the pump case 100 of the pump device 1 passes through the fan cover 32 and is sucked into the pump case 100. Then, the air passes through a plurality of openings S formed between the frame portions 34 of the fan cover 32 and is sucked into the first casing 101 and the second casing 102 from the air blowing ports 115 of the respective pump portions. The sucked air is discharged from the vent holes 116a and 116b while exchanging heat with the motor M or the like that is being driven.

  Here, as a comparative example, FIG. 6 shows a configuration example of a frame portion in a fan cover having a conventional structure. FIG. 6 is a cross-sectional view of the main part of the fan cover 40 according to the comparative example, and shows a part of the frame part 41 that forms a plurality of openings Sa. The fan cover 40 according to the comparative example is manufactured by punching a sheet metal or the like, and the front surface 411 and the back surface 412 of the frame portion 41 are configured by planes orthogonal to the Y-axis direction. The frame part 41 having such a configuration increases the flow path resistance of the opening Sa in order to inhibit the flow of air passing through the opening Sa. As a result, the air suction efficiency is lowered, and the cooling efficiency of the motor M is lowered. Further, the fan cover 40 causes air turbulence and wind noise is likely to occur.

  On the other hand, the fan cover 32 according to the pump device 1 of the present embodiment has a surface 341 of the frame portion 34 that is formed with a convex curved surface that is inclined from the top portion 341a toward the opening S. When air flows, air flows along the inclined surface from the top 341a. Thereby, the flow path resistance of the opening S is lower than that of the fan cover 40 according to the comparative example, and the air suction efficiency is increased. As a result, the cooling efficiency of the motor M and the surrounding pump case 100 is improved, and it is possible to extend the life of the pump device 1 and stabilize the operation.

  Further, in the fan cover 32 of the present embodiment, since the back surface 342 facing the fan 31 is formed in a concave shape, the movement of air along the rotation direction of the fan 31 is induced, thereby suppressing the occurrence of turbulence. Wind noise can be reduced.

  Further, the support member 35 of the fan cover 32 has a convex portion 351 and a concave portion 352 in which a joint portion 350 with the frame portion 34 is formed continuously with the convex surface 341 and the concave back surface 342 of the frame portion 34. Accordingly, no step is formed between the front surface 341 and the back surface 342 of the frame portion 34 and the support member 35, thereby suppressing pressure fluctuations at the joint portion 350 and enhancing the effect of preventing wind noise generation. In addition, since the plurality of frame portions 34 are formed of an annular frame, the flow of air moving in the rotation direction of the fan 31 is efficiently induced, which also greatly contributes to prevention of wind noise. it can.

  Furthermore, the fan cover 32 according to the present embodiment is formed of a molded body of a metal material in which an outer frame 33, a frame portion 34, a support member 35, and the like are integrally formed. Thereby, the frame part 34 and the support member 35 which have a predetermined curved surface can be produced easily. Further, for example, productivity can be increased as compared with a case where the metal wire is manufactured by welding or the like.

  Furthermore, since the fan cover 32 is formed of a metal material such as aluminum, the strength can be further increased as compared with a case where the fan cover 32 is formed of a molded body such as a resin having the same thickness. Therefore, the fan cover 32 can be thinned, and the material cost can be suppressed and the fan cover 32 can be manufactured at a low cost.

[Example]
As an example according to this embodiment, a fan cover having a diameter of about 130 mm and a surface area of about 13000 mm ² was produced. The opening ratio of the fan cover according to the example was about 40%. On the other hand, as a comparative example, a fan cover having the configuration shown in FIG. The fan cover according to the comparative example also has a surface area of about 13,000 mm ^{2 with} a diameter of about 130 mm and an aperture ratio of about 40%, as in the example. Each of these was applied as a blower unit of a pump device having a configuration according to this embodiment, and the amount of temperature increase on the cylinder surface after 120 minutes of operation was measured under a pressure of 50 kPa.

  As a result, in the pump device to which the fan cover according to the present embodiment is applied, the temperature rise of the cylinder is reduced by about 0.9K (° C.) and the temperature rise of the motor is about 3K (in comparison with the pump device according to the comparative example. ° C) decreased. From this result, it was confirmed that the fan cover 32 according to the present embodiment can suppress a decrease in cooling efficiency without changing the opening area.

  Here, the temperature rise of the cylinder causes wear of the seal member of the piston and deterioration of the bearing attached around the eccentric shaft, and also relates to the life of the pump device itself. Actually, when the increase in the temperature of the cylinder surface can be reduced by about 0.9K, it has been confirmed by the present inventors that the life of the pump device is improved by about 6%. That is, according to the fan cover 32 according to the present embodiment, it is possible to contribute to extending the life of the pump device 1.

  The embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.

  For example, in the above embodiment, the fan cover 32 constituting the blower unit 300 of the pump device 1 has been described as an example of the fan cover. However, the present invention also applies to a fan cover in other blower units other than the pump device. Applicable.

  Moreover, in the above embodiment, although the surface 341 of the frame part 34 was demonstrated as a curved surface, it is not restricted to this, For example, a cross-sectional shape may be trapezoidal. In addition, the cross-sectional shape may be a triangular shape with the apex 341a as one vertex.

  In the above embodiment, although it demonstrated that the some flame | frame part 34 was comprised with the cyclic | annular body formed in concentric form, it is not restricted to this, For example, you may arrange in the grid | lattice form. In this case, a support member for connecting the plurality of frame portions to the outer frame can be omitted, and the plurality of frame portions may be directly supported by the outer frame.

  Moreover, the frame part 34 is not limited to a case where a plurality of frame parts 34 are provided, and may be constituted by a single frame part. In this case, the frame portion may be formed in a wave shape such as a rectangular wave or a triangular wave in which the extending directions are alternately changed, or may be formed in a spiral shape wound spirally in a plane. .

  In the above embodiment, the intake port 114a and the exhaust port 114b have been described as being common to the first and second pump portions 11 and 12. However, the present invention is not limited to this, and the first and second pumps are not limited thereto. The parts 11 and 12 may have respective intake ports and exhaust ports.

  Further, in the above embodiment, the motor M of the pump device 1 is used as the rotational drive source of the fan 31, but a motor other than the motor M may be equipped as the rotational drive source of the fan 31.

  Furthermore, in the above embodiment, the fan constituting the air blowing unit on the second pump unit 12 side is configured as an air intake fan, but the fan may be configured as an air exhaust fan. In this case, the fan cover attached to the second pump unit 12 is disposed so that the surface of the frame part faces the fan, contrary to the fan cover 32 attached to the first pump unit 11. In the above configuration, the air sucked from the air blowing port 115 of the first casing 101 passes through the third casing 103 and is discharged from the air blowing port formed in the second casing 102. In this way, the pump device 1 can be efficiently cooled also by forming a one-way air flow in the pump case 100.

  The fan cover according to the present invention is not limited to the blower unit of the swing piston type pump, and can be similarly applied to other pump devices having a fan. Furthermore, it can be widely used as a fan cover for other electrical products such as an air conditioner outdoor unit.

DESCRIPTION OF SYMBOLS 1 ... Pump apparatus 10 ... Pump main body 21 ... Piston 31 ... Fan 32 ... Fan cover 33 ... Frame body 34 ... Frame part 35 ... Supporting member 200 ... Conversion mechanism 300 ... Air blow unit 100 ... Pump case 111 ... Cylinder 115 ... Air outlet 131 ... Drive shaft M ... Motor

Claims (2)

A pump body having an air outlet;
A fan for air suction arranged at the blower opening;
An outer frame that is attached to the air outlet and defines a fluid flow path along a uniaxial direction, a convex first surface that protrudes in the uniaxial direction, and a concave shape that faces the first surface in the uniaxial direction. A fan unit comprising: a second cover, and a fan cover that includes a frame portion that is supported by the outer frame and that divides the flow path into a plurality of regions .
The fan cover is a pump device in which the second surface and the fan are arranged so as to face each other in the uniaxial direction . A pump body having an air outlet;
An air exhaust fan disposed at the air outlet;
An outer frame that is attached to the air outlet and defines a fluid flow path along a uniaxial direction, a convex first surface that protrudes in the uniaxial direction, and a concave shape that faces the first surface in the uniaxial direction. A fan cover including a frame portion each having a second surface, supported by the outer frame, and dividing the flow path into a plurality of regions.
A blower unit with
Comprising
The fan cover is arranged such that the first surface and the fan are opposed to each other in the uniaxial direction.

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