CN104454460A - Air compressor - Google Patents
Air compressor Download PDFInfo
- Publication number
- CN104454460A CN104454460A CN201410422954.1A CN201410422954A CN104454460A CN 104454460 A CN104454460 A CN 104454460A CN 201410422954 A CN201410422954 A CN 201410422954A CN 104454460 A CN104454460 A CN 104454460A
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- China
- Prior art keywords
- air
- cooling fan
- flow
- motor
- air compressor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/06—Mobile combinations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
- F04B39/066—Cooling by ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
An air compressor includes a cooling fan having a back plate serving as a plate shape part formed on a flat plate, a normal line thereof being set to a direction along a rotational shaft of a motor, blades extending parallel with the rotational shaft from an inner side of the back plate towards an outer periphery thereof and being centrifugally formed on the back plate, and a ring part having a cylindrical shape substantially parallel with the rotational shaft and extending from the back plate towards a heat generation surface. When the motor is operated, exterior air sucked by the cooling fan is guided to a central part thereof, flows towards an outer periphery thereof along the back plate, deflected by the ring part, flows towards and collides with the heat generation surface and further flows radially.
Description
Technical field
The present invention relates to be applicable to generate and drive the compressed-air actuated air compressor needed for pneumatic tool such as such as nailing maching.
Background technique
In places such as building site, by compressed-air actuated pressure, by nail and screw, the Portable gas power driven tools be driven in wood materials is widely used.In general, for driving the air compressor of pneumatic tool etc. to construct be: by the bent axle of press part, the rotary motion of the running shaft of the driver parts such as such as motor is converted to the to-and-fro motion of the piston in cylinder and compressed the air sucked from the suction valve of cylinder by the to-and-fro motion of piston.The pressurized air compressed in the cylinder is discharged to air tank by pipeline from the outlet valve of cylinder and is stored in air tank.When by gas compression to high pressure time, increase the multistage reciprocating compressor of pressure with split-level and be commonly used.By the reduction valve be arranged on air tank, the high pressure air be stored in air tank is adjusted to suitable pressure, then by air hose, pressurized air is supplied to pneumatic tool etc.This air compressor is disclosed in JP-A-2013-40586.
Summary of the invention
Air compressor has multiple heating part, and wherein, the temperature of heating part uprises along with the use of motor, press part (particularly cylinder), control circuit etc.Therefore, in many cases, heating part should be arranged on isolated position.Therefore, be necessary reliably the cooling-air generated by the cooling fan be arranged on the running shaft of motor to be guided to corresponding heating part.But heating part is difficult to the place cooled by common cooling fan because layout reasons may be positioned at, and this is just to the problem that cooling effectiveness will solve.
Therefore, the object of the present invention is to provide a kind of air compressor that can be improved cooling effectiveness by cooling fan.
According to an illustrative aspects of the present invention, provide a kind of air compressor, described air compressor comprises: air tank, and it is configured to compressed-air-storing in described air tank; Press part, its be configured to compress from outside suck air and supply air to air tank; Motor, it is configured to drive press part; Cooling fan, it is arranged on a side of the running shaft of motor; And cover piece, it is configured at least cover described press part, described motor and described cooling fan, wherein, described cooling fan comprises the peripheral part that is arranged on described cooling fan and has the ring part of roughly sleeve-like shape, and described cooling fan is constructed by the direction that described ring part changes air-flow.
Incidentally, above-mentioned key element combination in any and to transform and the method, system etc. that obtain also are effective as each aspect of the present invention from of the present invention expression.
According to illustrative aspects of the present invention, a kind of air compressor that can be improved cooling effectiveness by cooling fan can be provided.
Accompanying drawing explanation
Fig. 1 is the perspective view of the air compressor 1 according to the first exemplary embodiment of the present invention;
Fig. 2 is the planimetric map of air compressor 1, wherein, shows the cross section of cover piece 26;
Fig. 3 is the section plan of air compressor 1;
Fig. 4 is the IV-IV sectional view of Fig. 2;
Fig. 5 is the positive view of air compressor 1;
Fig. 6 is the first perspective view seen from the below of the cover piece 26 of air compressor 1;
Fig. 7 is the second perspective view seen from the below of the cover piece 26 of air compressor 1;
Fig. 8 is the VIII-VIII sectional view of Fig. 4 relevant to the cover piece 26 of air compressor 1;
Fig. 9 is the IX-IX sectional view of Fig. 4 relevant to the cover piece 26 of air compressor 1;
Figure 10 is the perspective view of the cooling fan 8b of air compressor 1;
Figure 11 is the perspective view of the cooling fan 8a of air compressor 1;
Figure 12 is the perspective view of the 7th baffle plate 306 of air compressor 1;
Figure 13 is the planimetric map of the air compressor according to the second exemplary embodiment of the present invention, wherein, shows the cross section of cover piece 26;
Figure 14 is the planimetric map of the air compressor according to the 3rd exemplary embodiment of the present invention, wherein, shows the cross section of cover piece 26; And
Figure 15 is the planimetric map of the air compressor according to the 4th exemplary embodiment of the present invention, wherein, shows the cross section of cover piece 26.
Embodiment
Hereinafter, with reference to accompanying drawing, preferred illustrative embodiment of the present invention is described.Incidentally, identical or equivalent element, parts etc. shown in each accompanying drawing represent with identical reference character, and suitably eliminate repeated description.In addition, exemplary embodiment is only exemplary instead of limitation of the present invention, and all features described in exemplary embodiment and combination thereof should not be regarded as essential condition of the present invention.
< first exemplary embodiment >
Fig. 1 is the perspective view of the air compressor 1 according to the first exemplary embodiment of the present invention.Fig. 2 is the planimetric map of air compressor 1, wherein, shows the cross section of cover piece 26.Incidentally, not shown grip part 31a, 31b in fig. 2.Fig. 3 is the section plan of air compressor 1.Fig. 4 is the IV-IV sectional view of Fig. 2.Fig. 5 is the positive view of air compressor 1.Fig. 6 is the first perspective view seen from the below of the cover piece 26 of air compressor 1.Fig. 7 is the second perspective view seen from the below of the cover piece 26 of air compressor 1.Fig. 8 is the VIII-VIII sectional view of Fig. 4 relevant to the cover piece 26 of air compressor 1.Fig. 9 is the IX-IX sectional view of Fig. 4.Figure 10 is the perspective view of the cooling fan 8b of air compressor 1.Figure 11 is the perspective view of the cooling fan 8a of air compressor 1.Figure 12 is the perspective view of the 7th baffle plate 306 of air compressor 1.
Air compressor 1 comprises: a pair air tank 2a, 2b, and it is arranged and storing compressed air abreast with predetermined interval; Press part 3, its for compress from outside suck air and pressurized air is supplied to air tank 2a, 2b; And motor 4, it is connected with press part 3 and for driving press part 3.Motor 4 and press part 3 are arranged on the top of a pair air tank 2a, 2b, so that the axis of motor 4 is substantially vertical with the longitudinal direction of a pair air tank 2a, 2b.
As shown in Figure 3, the running shaft 5 of motor 4 runs through press part 3, and be provided with cooling fan 8a (the first cooling fan) in the motor side end of the running shaft 5 of motor 4, and the on-electric pusher side end of the running shaft 5 of motor 4 is provided with cooling fan 8b (the second cooling fan).Cooling fan 8a, 8b and motor 4 rotate integratedly.
As shown in Figure 2, near press part 3 along a pair air tank 2a, 2b be vertically arranged with reduction valve 9a, 9b, for show through the compressed-air actuated pressure of decompression pressure gauge 10a, 10b and be used as adaptor 11a, 11b of compressed-air actuated outlet.The pneumatic tool (not shown) such as adaptor 11a, 11b and such as nailing maching are connected by the air hose (not shown) for high pressure by operator, and utilize compressed-air control pneumatic tool suitably to operate.
As shown in Figure 2, air tank 2a, 2b is provided with safety valve 12 and drainage means 13.Safety valve 12 is configured to be discharged to the outside by a part of pressurized air when pressure anomaly rises.Drainage means 13 has operation unit 14.When manipulation operations portion 14, the pressurized air in air tank 2a, 2b and moisture can suitably be discharged to the outside.
As shown in Figure 3, in press part 3, crank mechanism is provided with.The rotary motion of the running shaft 5 of motor 4 is converted to the to-and-fro motion of first piston 34a and the second piston 34b respectively by first connecting rod 33a and second connecting rod 33b.First piston 34a is contained in the first cylinder 15a and the first cylinder head 16a.Second piston 34b is contained in the second cylinder 15b and the second cylinder head 16b.In the horizontal direction toward each other, the running shaft 5 of motor 4 is between the first cylinder 15a and the second cylinder 15b for first cylinder 15a and the second cylinder 15b.First cylinder 15a and the second cylinder 15b is set to air tank 2a, 2b almost parallel respectively.When outside air is inhaled in press part 3, the air compressed by the second cylinder 15b first by the second cylinder 15b (low voltage side cylinder) compression, and is supplied to the first cylinder 15a (high pressure side cylinder) by pipeline 19a (see Fig. 2) by air.Air tank 2a is supplied to by pipeline 19b by the air that the first cylinder 15a compresses further.Air tank 2a, 2b are connected to each other by connecting tube 20, so that the pressure of air tank 2a, 2b is uniform.
As shown in Figure 3, the control circuit 21 (control circuit board) for drive motor 4 holds in the housing 22.Control circuit 21 is set to relative with the cooling fan 8b of the on-electric pusher side being positioned at press part 3.Control circuit 21 is fixed on air tank 2a.Motor 4 is DC Brushless Motor, and has stator coil 23, is arranged on the rotor 24 in stator coil 23 and the Hall element plate 25 (see Fig. 2) for the rotational position of detection rotor 24.Control circuit 21 pairs of motor 4 carry out inverter control.Control circuit 21 comprises such as the heating component 204 (see Fig. 3) such as thyristor of inverter control.The surface structure being provided with heating component 204 of housing 22 is heating surface 203, and this surface is to be cooled or from this surface emissivity heat.
As shown in Figure 1, the cover piece 26 for the parts such as such as press part 3, motor 4, control circuit 21 covering air compressor is arranged on the top of air tank 2a, 2b and is fixed on air tank 2a, 2b.Longitudinally two ends of air tank 2a, 2b are provided with grip part 31a, 31b for carrying air compressor 1.Cover piece 26 is provided with the operation panel 26 for maneuveringair compressor 1 grade, and operation panel 26 has power switch (not shown).Cover piece 26 is provided with vent window 29a, 29b (see Fig. 6 and Fig. 7) on the wall relative with cooling fan 8a, 8b.Cover piece 30 (see Fig. 4) for preventing from introducing foreign matter is installed in addition between air tank 2a, 2b.Air tank 2a, 2b are provided with for preventing the direct kiss the earth of air tank 2a, 2b to protect the leg section 32 of air tank 2a, 2b.
Between the on-stream period of air compressor 1, be alternately applied on motor 4 by the compressed-air actuated compressive load of to-and-fro motion of first piston 34a and the second piston 34b.For this reason, in stator coil 23 and control circuit 21, generate load current, the temperature of stator coil 23 and control circuit 21 can be made like this to raise because of the Joule heat along with load current.In addition, the temperature of the first cylinder 15a, the first cylinder head 16a, the second cylinder 15b and the second cylinder head 16b raises because of compressed-air actuated compression heat.The temperature of pipeline 19a, 19b and air tank 2a, 2b also raises, and this is that the pressurized air raised due to the temperature because of compression heat has flow through pipeline 19a, 19b and air tank 2a, 2b.For this reason, it may be necessary the rising that cooling suppresses the temperature of corresponding part, focus on the heating component such as such as the first cylinder 15a, the first cylinder head 16a, the second cylinder 15b, the second cylinder head 16b, stator coil 23, control circuit 21, housing 22.Hereinafter, be described to the structure relevant with cooling.
(being cooled by cooling fan 8a)
In common axial flow fan, the air-flow generated has the trend of circumferentially direction flowing because of the effect of its high centrifugal force.Therefore, be difficult to promote the air current flow in adjacent motor, therefore heat probably gathers in the motor.Here, be described to the structure being used for the cooling performance improving motor 4.
As shown in figure 11, cooling fan 8a has outer leafs 104 and intra vane 105.Outer leafs 104 and intra vane 105 are connected to each other by tubular separating part (cylindrical portion) 102.Separating part 102 extends along the direction of the running shaft of motor 4.Assembly department 103 is formed in the inside of intra vane 105.Cooling fan 8a can be arranged on the running shaft 5 of motor 4 by assembly department 103.Intra vane 105 forms as one with separating part 102 and assembly department 103.Intra vane 105 is formed as the twisted plate shape extended substantially in parallel with the running shaft 5 of motor 4, namely so-called centrifugal.Cooling fan 8a has the through hole formed by adjacent intra vane 105, separating part 102 and assembly department 103.Through hole is formed as making the opening area of the opening 107 of on-electric pusher side be less than the opening area (see Fig. 3) of the opening 106 of the motor side of opposition side.Outer leafs 104 is formed as the curved shape extended obliquely relative to the direction of the running shaft 5 along motor 4, i.e. so-called axial flow.As shown in Figure 3, the outer diameter D 2 of outer leafs 104 is set to the outer diameter D 1 being greater than motor 4.Cover piece 26 is formed with the vent window 29a relative with cooling fan 8a.The middle body of vent window 29a is formed with the shutter 101 (see Fig. 7 and Fig. 8) that be also used as occlusion part relative to intra vane 105.
When motor 4 operates, cooling fan 8a rotates and generates air-flow.That is, outer leafs 104 sucks outside air by vent window 29a from outside, and generates the air-flow CA1 flowing to the first cylinder 15a, the first cylinder head 16a, the second cylinder 15b and the second cylinder head 16b as shown in Figure 3.In addition, a part for the air-flow generated by outer leafs 104 flows to stator coil 23, as air-flow CA2.Now, the air near stator coil 23 is inhaled into intra vane 105, as air-flow CA3 by means of the negative pressure P1 generated in addition by intra vane 105.The air being inhaled into intra vane 105 can be flowed out from the opening 106 of motor side towards the opening 107 of on-electric pusher side by the negative pressure P2 that generated by outer leafs 104, is then inhaled into outer leafs 104, as air-flow CA4.After this, the air (as air-flow CA4) being inhaled into outer leafs 104 can flow out together with air-flow CA1.As shown in Figure 4, the cooling air having completed cooling passes and is discharged to the outside of cover piece 30 between air tank 2a, 2b.
Thereby, it is possible to generate air-flow CA3, CA4 (air-flow generated by intra vane 105 is subject to the restriction of the cylindrical internal surface of separating part 102 and can reliably flows along the direction of the running shaft of cooling fan 8a) by intra vane 105.Therefore, it is possible to show the synergy with air-flow CA1, CA2 of outer leafs 104, and high flow rate can be generated near stator coil 23, and the air-flow at this place stagnates in the prior art.Thereby, it is possible to effectively suppress the rising of the temperature of stator coil 23.That is, the cooling performance of motor 4 booster action or the synergy of the air-flow (the easily circumferentially direction flowing because of the effect of high centrifugal force of this air-flow) to outer leafs 104 can be realized, can be improved by cooling fan 8a by intra vane 105.
In addition, in the first cylinder 15a and the second cylinder 15b, compressed-air actuated compressive load is alternately applied on the running shaft 5 of motor 4, can produce like this and rotate change.Therefore, cooling fan 8a is produced to the torsional vibration occurred because rotating change.But, use multiple intra vane 105 assembly department 103 and separating part 102 to be linked together securely.Thereby, it is possible to the stress that dispersion and minimizing produce because of torsional vibration, thus improve intensity and the reliability of cooling fan 8a.In addition, because intra vane 105 is also used as joint (framework) connected to each other to separating part 102 and assembly department 103, therefore without the need to forming separately the joint being unfavorable for air-flow, to make structure efficient.Incidentally, by increasing the quantity of intra vane 105, intra vane 105 can be improved as the performance of fan and improving the join strength of separating part 102 and assembly department 103.
In addition, between the opening area of the opening area of the opening 107 of the on-electric pusher side of cooling fan 8a and the opening 106 of motor side, there is difference.Thus, the flow direction controlling the air-flow generated by intra vane 105 is easy to.That is, by suitably regulating the open area ratio between the opening 107 of on-electric pusher side and the opening 106 of motor side, the flow direction of the air-flow generated by intra vane 105 suitably can be controlled.
In addition, outer leafs 104 sucks air from on-electric pusher side (outside of cover piece 26) and air-flow can be made to flow out towards motor 4 and press part 3.Therefore, it is possible to a large amount of outside airs lower than the temperature in cover piece 26 for temperature are drawn in cover piece 26, and cool motors 4, press part 3 etc. widely.
In addition, owing to being provided with shutter 101, act on by outer leafs 104 the negative pressure P2 generated between cooling fan 8a and shutter 101 because this increasing.Thereby, it is possible to promote air-flow CA3, CA4 flowing further, thus greatly improve cooling effectiveness.That is, the air near motor 4 (being drawn into the air of the middle body of cooling fan 8a by intra vane 105 by means of negative pressure (suction)) can be made to flow towards the on-electric pusher side of intra vane 105 reposefully, and improve the cooling effect near motor further by the synergy of the negative pressure of outer leafs 104 and the negative pressure of intra vane 105.
In addition, the outer diameter D 2 of outer leafs 104 is set to the outer diameter D 1 being greater than motor 4.Thus, a part for the air-flow generated by outer leafs 104 is not directly supplied to press part 3 via motor 4.As a result, the cooling effectiveness of press part 3 can be improved.
In addition, the air quantity produced by outer leafs 104 is set to be greater than the air quantity that can flow over the inner side of separating part 102 produced by intra vane 105.Thus, be easy to a part for the air-flow generated by the intra vane 105 of the air-flow mainly generated near motor 4 is flowed together with the air-flow generated by outer leafs 104.Therefore, it is possible to reliably air-flow is supplied to press part 3 and air-flow is discharged to the outside of cover piece the most at last after motor cooling.Therefore, it is possible to get rid of the adverse effect to cooling performance because heat accumulation causes near motor 4, thus improve cooling performance.
Incidentally, suitably can change the area ratio between the opening 106 of the motor side of cooling fan 8a and the opening 107 of on-electric pusher side, and suitably can change the shape of intra vane 105 and outer leafs 104.
(being cooled by cooling fan 8b)
In general, air compressor has multiple heating component, and wherein, the temperature of heating component uprises along with the use of motor, press part (particularly cylinder), control circuit etc.Therefore, in many cases, heating component should be arranged on isolated position.Therefore, be necessary reliably the cooling-air generated by the cooling fan be arranged on the running shaft of motor to be guided to corresponding heating component.But heating component is difficult to the place cooled by common cooling fan because layout reasons may be positioned at, and this is just to the problem that cooling effectiveness will solve.About this problem, be described to the structure being used for improving cooling effectiveness.
As shown in Figure 3 and Figure 4, housing 22 and control circuit 21 are set to relative with the cooling fan 8b on the end of the on-electric pusher side of the running shaft 5 being arranged on motor 4.In the housing 22, the heating surface 203 being provided with heating component 204 of the control circuit 21 held is relative with cooling fan 8b.Heating component 204 is relative with the peripheral part (ring part 201 that will be described later) of cooling fan 8b, so that heating surface 203 is between heating component 204 and ring part 201.Heating component 204 is IGBT (insulated gate bipolar transistor), diode bridge, IPM (Intelligent Power Module) etc.
As shown in Figure 10, cooling fan 8b has the backboard 202 as the plate-like portion be formed on flat board, and the normal of backboard 202 is set to the direction of the running shaft 5 along motor 4.The blade 200 extended towards the periphery of backboard 202 abreast from the inner side of backboard 202 and the running shaft 5 of motor 4 is formed in backboard 202 eccentrically.Assembly department 205 is formed in the inner side of blade 200.Cooling fan 8b can be arranged on the running shaft 5 of motor 4 by assembly department 205.The outer circumference end of cooling fan 8b is formed with ring part 201.Ring part 201 has the sleeve-like shape almost parallel with the running shaft 5 of motor 4.Ring part 201 extends from backboard 202 towards heating surface 203.Ring part 201 and assembly department 205 are integrated whole being circumferentially formed by connecting by backboard 202.The motor side of backboard 202 completely between closed ring portion 201 and assembly department 205.
In addition, as shown in Figure 2, near cooling fan 8b, be provided with fifth gear plate 304 (retaining wall portion), sixth gear plate 305 (retaining wall portion) and the 7th baffle plate 306 (retaining wall portion).Fifth gear plate 304 and sixth gear plate 305 are formed as the flank overhang from cover piece 26.The 7th baffle plate 306 for single part shown in Figure 12 is arranged on housing 22 by screw material.As shown in Figure 2, the 7th baffle plate 306 is formed from housing 22 towards the on-electric pusher side of the second cylinder 15b.Fifth gear plate 304 overhangs from cover piece 26 towards housing 22.Fifth gear plate 304 is formed with the diameter opening 207 (notch part) less than the diameter D3 (see Fig. 4) of cooling fan 8b (see Fig. 4 and Fig. 6 etc.).Sixth gear plate 305 and fifth gear plate 304 form as one, and are formed smoothly from fifth gear plate 304 towards the on-electric pusher side of the first cylinder 15a.The wall relative with cooling fan 8b of cover piece 26 is formed with vent window 29b.
As shown in Figure 3, when motor 4 operates, cooling fan 8b sucks outside air by vent window 29b from outside, as air-flow CA10, and by opening 207, outside air is guided to the middle body of cooling fan 8b.Air-flow CA10 flows, as air-flow CA11 along backboard 202 towards the periphery of cooling fan 8b.Then, as shown in Figure 3, ring part 201 makes air-flow CA11 deflect (changing its flow direction) so that the flow direction of air-flow CA11 is close to suck the suction direction of air-flow CA10 parallel with cooling fan 8b, air-flow CA11 flows to heating surface 203 (the first heating part) and collides with heating surface 203, and further along heating surface 203 from cooling fan 8b Radial Flow.A part of air-flow CA11 is directed to the on-electric pusher side (the second heating component) of the first cylinder 15a and the second cylinder 15b by fifth gear plate 304, sixth gear plate 305 and the 7th baffle plate 306, as air-flow CA12, CA13.As shown in Figure 4, the cooling-air having completed cooling passes and is discharged to the outside of cover piece 30 between air tank 2a, 2b.
Like this, cooling-air is deflected by ring part 201, therefore, it is possible to reliably collide with heating surface 203.Thereby, it is possible to improve the cooling effectiveness of heating surface 203 significantly.In addition, by arranging backboard 202, more cooling-air can be made reliably to flow to on-electric pusher side (heating surface 203 side), the cooling effectiveness of heating surface 203 can be improved further.In addition, because air-flow can flow out so that the heating surface 203 towards the front being arranged on cooling fan 8b is discharged, therefore, it is possible to improve cooling effectiveness further.That is, due to cooling fan 8b center suck air and can utilize blade 200 and backboard 202 make air circumferentially direction flow out and by ring part 201 along air-flow outflow direction apply axial component (component relative with on-electric pusher side), therefore reliably cooling-air can also be supplied to heating surface 203, heating surface 203 is present in the plane different from cooling fan 8b.The cooling-air being supplied to heating surface 203 is mainly introduced by vent window 29b and not yet for the outside air of other cooling.Therefore, the cooling effectiveness of heating surface 203 is good.
In addition, the cooling-air cooling heating surface 203 and the cooling-air not yet arriving heating surface 203 can be utilized to cool the first cylinder 15a and the second cylinder 15b by fifth gear plate 304, sixth gear plate 305 and the 7th baffle plate 306.The effect of this structure is highly beneficial, because the on-electric pusher side of the on-electric pusher side of the first cylinder 15a and the second cylinder 15b is difficult to be cooled by the air-flow CA1 that generated by cooling fan 8a and their temperature raises possibly.
In addition, in the first cylinder 15a and the second cylinder 15b, compressed-air actuated compressive load is alternately applied on the running shaft 5 of motor 4, can produce like this and rotate change.Therefore, cooling fan 8b is produced to the torsional vibration occurred because rotating change.But because ring part 201 is connected with backboard 202, the section modulus of cross section that therefore normal extends along the direction of the running shaft 5 of motor 4 increases, significantly can obtain enough intensity to overcome centrifugal load and torsional vibration load.In addition, because backboard 202 is provided with blade 200, the intensity of blade 200 can also therefore be increased.Incidentally, from the viewpoint of the cooling effectiveness of raising first heating part, preferably ring part 201 is connected with assembly department 205, so that the motor side of backboard 202 completely between closed ring portion 201 and assembly department 205.As selection, ring part 201 is connected with assembly department 205 so that the structure of backboard 202 partly enclosed motor side is also feasible.
In addition, ring part 201 not only have the direction changing cooling-air function but also have increase cooling fan 8b inertial force to alleviate the flywheel ring function of whirling vibration, thus reducing the load acted on motor 4 because rotating change, this is structurally efficient.From another viewpoint, the ring part 201 as flywheel ring provides the function in the direction changing cooling-air, so that ring part 201 can be used in improving cooling effectiveness, this is equally structurally efficient.
Incidentally, blade 200 is not limited to centrifugal and can suitably changes.Ring part 201 is non-essential to be complete tubular and can be formed as making cooling-air towards the heating component deflection except control circuit 21, housing 22 and heating surface 203.Ring part 201 is non-essential to be parallel to the running shaft 5 of motor 4 and can to tilt with first heating part that led by cooling-air relative to backboard 202.Cooling fan 8b can be installed as the vent window 29b making backboard 202 towards cover piece 26.
(cooling of cylinder head)
During piston in press part 3 carries out compression process, by compression be fed in cylinder head by the pressurized air heated with higher flow velocity, then by tube storage in air tank.Therefore, because high temperature air flows in cylinder head with high flow velocities, therefore carry out the heat trnasfer from high temperature air to cylinder head to a great extent, and the cylinder head of press part 3 becomes high temperature.Therefore, in order to effectively cool, need to concentrate cooling to become the cylinder head of maximum temperature.Hereinafter, be described to the structure being used for cooling air cylinder cap effectively.
As shown in Figure 2, first baffle plate 300 (retaining wall portion) is arranged in cover piece 26 with roughly rectilinear form, so that the virtual elongation line when viewed from above, tilted relative to the running shaft 5 of motor 4 towards the sense of rotation along cooling fan 8a be positioned at downstream side the first cylinder 15a and through the top of the first cylinder head 16a.Here, the virtual elongation line of the first baffle plate 300 overlaps with the linear approximation straight line of the first baffle plate 300.When viewed from above, along the air flue of the wall towards cooling fan 8a of the first baffle plate 300 or the virtual elongation line of air flue crossing with the first cylinder head 16a.
Second baffle 301 (retaining wall portion) is arranged on the top of the first cylinder head 16a, so that second baffle 301 overhangs (see Fig. 5) from cover piece 26 towards the first cylinder head 16a.Second baffle 301 is set to crossing with the air flue of the linear approximation straight line along the first baffle plate 300 or the first baffle plate 300 or the virtual elongation line of air flue, and the air-flow being directed to the first baffle plate 300 can be made to flow near the first cylinder head 16a or the first cylinder head 16a.
Third gear plate 302 (retaining wall portion) is arranged on the second cylinder head 16b side with roughly rectilinear form, so that when viewed from above, the virtual elongation line tilted relative to the running shaft 5 of motor 4 is through the top of the second cylinder head 16b.Here, the virtual elongation line of third gear plate 302 overlaps with the linear approximation straight line of third gear plate 302.When viewed from above, along the air flue of the wall towards cooling fan 8a of third gear plate 302 or the virtual elongation line of air flue crossing with the second cylinder head 16b.
Fourth gear plate 303 (retaining wall portion) is set to towards the second cylinder head 16b (see Fig. 5).Fourth gear plate 303 is set to crossing with the air flue of the linear approximation straight line along third gear plate 302 or third gear plate 302 or the virtual elongation line of air flue, so that fourth gear plate 303 can make the air-flow being directed to third gear plate 302 flow near the second cylinder head 16b or the second cylinder head 16b.
First baffle plate 300 and third gear plate 302 are connected thus form roughly V-arrangement shape above the running shaft 5 of motor 4.In addition, as shown in Figure 6 and Figure 7, the first baffle plate 300, second baffle 301 and third gear plate 302 are formed as the flank extending (giving prominence to) from cover piece 26 integratedly downwards, and fourth gear plate 303 is formed in a part for the wall of cover piece 26.As shown in Figure 2, the first baffle plate 300 and third gear plate 302 are set to form different angles relative to the running shaft 5 of motor 4, advantageously to cool the first cylinder head 16a and the second cylinder head 16b.
8th baffle plate 307 and the 9th baffle plate 308 (see Fig. 7) are set to prevent air from detouring from the motor side of cooling fan 8a towards on-electric pusher side and prevent air from flowing out to the outside of the first cylinder head 16a cover piece 26 and the outside of the second cylinder head 16b.8th baffle plate 307 and the 9th baffle plate 308 are formed as the flank extending (overhanging) from cover piece 26 integratedly.
As shown in Figure 2, between the on-stream period of air compressor 1, the running shaft 5 of motor 4 rotates and generates pressurized air, and cooling fan 8a rotates and is drawn into cover piece 26 from vent window 29a by air.Cooling-air turns round along the sense of rotation of cooling fan 8a, as air-flow CA20 (see Fig. 2), and flows along the running shaft 5 of motor 4 towards press part 3.Then, cooling-air is guided to the first cylinder head 16a, as air-flow CA21, and as shown in Figure 5 by the first baffle plate 300 (and upper surface of cover piece 26), cooling-air can be made to flow further by second baffle 301 and be discharged to the first cylinder head 16a, as air-flow CA22.Therefore, cooling-air is made reliably to arrive the first cylinder head 16a by the first baffle plate 300 and second baffle 301, therefore, it is possible to effectively cool the first cylinder head 16a due to such flowing can be formed.Here, because air-flow flows along wall with high flow velocities, therefore when viewed from above, by enabling the linear approximation straight line of the first baffle plate 300 or virtual elongation line reliably the air-flow of high flow rate be guided to towards the first cylinder head 16a the first cylinder head 16a that temperature easily raises.As a result, high efficiency cooling can be realized.
In addition, by third gear plate 302 (and upper surface of cover piece 26), a part of air-flow CA20 is guided to the second cylinder head 16b, as air-flow CA23, and as shown in Figure 5, air can be made to flow by fourth gear plate 303 and be discharged near the second cylinder head 16b, as air-flow CA24.Therefore, cooling-air is made reliably to arrive the second cylinder head 16b by third gear plate 302 and fourth gear plate 303, therefore, it is possible to effectively cool the second cylinder head 16b due to such flowing can be formed.Here, because air-flow flows along wall with high flow velocities, therefore when viewed from above, by enabling the linear approximation straight line of third gear plate 302 or virtual elongation line reliably the air-flow of high flow rate be guided to towards the second cylinder head 16b the second cylinder head 16b that temperature easily raises.As a result, high efficiency cooling can be realized.
In addition, first baffle plate 300 is connected above the running shaft 5 of motor 4 with third gear plate 302, thus a certain amount of cooling-air is assigned to the first cylinder head 16a and the second cylinder head 16b, so that the air quantity of the sense of rotation along cooling fan 8a of the first baffle plate 300 arranges larger.Therefore, it is possible to the airway resistance preventing the third gear plate 302 because arranging against the sense of rotation of cooling fan 8a from causing is too high, the first cylinder head 16a and the second cylinder head 16b advantageously can be cooled.That is, the air quantity guided due to the first baffle plate 300 of the gyratory directions along air-flow is set greater than the air quantity that third gear plate 302 that the gyratory directions against air-flow arranges guides, therefore, it is possible to cool the first cylinder head 16a and the second cylinder head 16b while suppressing the airway resistance caused because of third gear plate 302 to increase.The cooling-air having completed cooling mainly passes and is discharged to the outside of cover piece 30 between air tank 2a, 2b.
Incidentally, the first baffle plate 300 and third gear plate 302 are formed as having rectilinear form ideally, to reduce airway resistance (wall towards cooling fan 8a side is formed as plane) as far as possible.But, even if the first baffle plate 300 and/or third gear plate 302 are partly bending such as to avoid other elements, also cooling-air can be guided to the first cylinder head 16a or the second cylinder head 16b, this is because linear approximation straight line is formed to pass the top of the first cylinder head 16a or the second cylinder head 16b.
< second exemplary embodiment >
Figure 13 is the planimetric map of the air compressor according to the second exemplary embodiment of the present invention, illustrated therein is the cross section of cover piece 26.Except the first baffle plate 300 and third gear plate 302 are bent into except the protrusion of cooling fan 8a side, the air compressor of this exemplary embodiment is identical with the first exemplary embodiment.When viewed from above, the linear approximation straight line of the first baffle plate 300 and third gear plate 302 or virtual elongation line crossing with the first cylinder head 16a and the second cylinder head 16b.Equally in the present example embodiment, the effect identical with the first exemplary embodiment can be obtained.
< the 3rd exemplary embodiment >
Figure 14 is the planimetric map of the air compressor according to the 3rd exemplary embodiment of the present invention, illustrated therein is the cross section of cover piece 26.Except the joint between the first baffle plate 300 and third gear plate 302 from the top of the running shaft 5 of motor 4 except the second cylinder head 16b skew, the air compressor of this exemplary embodiment is identical with the first exemplary embodiment.In the present example embodiment, compared with the first exemplary embodiment, the air quantity arriving the first cylinder head 16a increases and the air quantity arriving the second cylinder head 16b decreases.But, the airway resistance because third gear plate 302 causes against the gyratory directions setting of air-flow can be reduced.
< the 4th exemplary embodiment >
Figure 15 is the planimetric map of the air compressor according to the 4th exemplary embodiment of the present invention, illustrated therein is the cross section of cover piece 26.Except omitting third gear plate 302 and the first baffle plate 300 extends to except the second cylinder head 16b side, the air compressor of this exemplary embodiment is identical with the first exemplary embodiment.In the present example embodiment, compared with the first exemplary embodiment, the air quantity arriving the first cylinder head 16a increases and the air quantity arriving the second cylinder head 16b decreases.But, due to the third gear plate 302 that the gyratory directions eliminated against air-flow is arranged, because this reducing airway resistance.
Although reference example embodiment describes the present invention, those skilled in the art it is understood that: the respective element of exemplary embodiment and respective process can have various modification in the protection domain that claims limit.
Also disclose following item in this manual.
(1) air compressor comprises: an air tank, and it is configured to compressed-air-storing in air tank; Press part, its be configured to compress from outside suck air and supply air to air tank; Motor, it is configured to drive press part; Cooling fan, it is arranged on a side of the running shaft of motor; And cover piece, it is configured at least cover press part, motor and cooling fan, wherein, cooling fan comprises the peripheral part that is arranged on cooling fan and has the ring part of roughly sleeve-like shape, and cooling fan is constructed by the direction that ring part changes air-flow.
(2) air compressor Gen Ju (1), wherein, ring part is configured to air-flow to guide to the first heating part.
(3) according to (1) or the air compressor described in (2), wherein, cooling fan comprises plate-like portion, plate-like portion partly bridge joint between ring part and the assembly department installing on the rotary shaft.
(4) air compressor Gen Ju (3), wherein, assembly department and ring part are integrated whole being circumferentially formed by connecting by plate-like portion.
(5) according to (3) or the air compressor described in (4), wherein, cooling fan comprises the blade for generating air-flow, and blade becomes to be integrated with plate-like portion.
(6) according to the air compressor according to any one of (1) to (5), wherein, the rotation that cooling fan is constructed by blade generates the air-flow that flows from central side towards peripheral direction and changes the direction of air-flow, so that air-flow has the component in the direction along running shaft.
(7) air compressor Gen Ju (6), wherein, relative with cooling fan and the position of the gas stream make impact being changed direction by ring part is provided with the first heating part.
(8) air compressor Gen Ju (7), wherein, in the side identical with the first heating part the position that the part except middle body with cooling fan is relative is provided with retaining wall portion, cooling fan is configured to suck the air-flow passed between the first heating part and retaining wall portion, and ring part makes the outflow direction of the air-flow of cooling fan close to parallel with the suction direction of air-flow.
(9) according to (7) or the air compressor described in (8), wherein, the first heating part is the holding member of control circuit board or control circuit board.
(10) according to the air compressor according to any one of (1) to (9), wherein, cover piece comprises vent window in the position relative with the suction side of cooling fan.
(11) retaining wall portion is also comprised according to air compressor according to any one of (1) to (10), the direction of the air-flow that retaining wall cage structure for a change flows out from cooling fan and guide air-flow towards the second heating component.
(12) air compressor Gen Ju (11), wherein, the second heating component is the cylinder of press part.
(13) air compressor Gen Ju (12) also comprises another cooling fan, another cooling fan is arranged on another side of the running shaft of motor, wherein, retaining wall cage structure is the side air-flow flowed out from cooling fan being guided to cylinder, and the air-flow flowed out from another cooling fan does not collide with the side of cylinder.
Claims (13)
1. an air compressor, comprising:
Air tank, it is configured to compressed-air-storing in described air tank;
Press part, its be configured to compress from outside suck air and supply air to described air tank;
Motor, it is configured to drive described press part;
Cooling fan, it is arranged on a side of the running shaft of described motor; And
Cover piece, it is configured at least cover described press part, described motor and described cooling fan,
It is characterized in that, described cooling fan comprises the peripheral part that is arranged on described cooling fan and has the ring part of roughly sleeve-like shape, and
Described cooling fan is constructed by the direction that described ring part changes air-flow.
2. air compressor according to claim 1, wherein,
Described ring part is configured to described air-flow to guide to the first heating part.
3. air compressor according to claim 1, wherein,
Described cooling fan comprises plate-like portion, described plate-like portion partly bridge joint between described ring part and the assembly department being arranged on described running shaft.
4. air compressor according to claim 3, wherein,
Described assembly department and described ring part are integrated whole being circumferentially formed by connecting by described plate-like portion.
5. air compressor according to claim 3, wherein,
Described cooling fan comprises the blade for generating air-flow, and
Described blade becomes to be integrated with described plate-like portion.
6. air compressor according to claim 1, wherein,
The rotation that described cooling fan is constructed by described blade generates the air-flow that flows from central side towards peripheral direction and changes the direction of described air-flow, so that described air-flow has the component in the direction along described running shaft.
7. air compressor according to claim 6, wherein,
Relative with described cooling fan and the position of the described gas stream make impact being changed direction by described ring part is provided with the first heating part.
8. air compressor according to claim 7, wherein,
The position that the part except middle body with described cooling fan is relative is provided with retaining wall portion in the side identical with described first heating part,
Described cooling fan is configured to suck the described air-flow passed between described first heating part and described retaining wall portion, and
Described ring part makes the outflow direction of the described air-flow of described cooling fan close to parallel with the suction direction of described air-flow.
9. air compressor according to claim 7, wherein,
Described first heating part is the holding member of control circuit board or described control circuit board.
10. air compressor according to claim 1, wherein,
Described cover piece comprises vent window in the position relative with the suction side of described cooling fan.
11. air compressors according to claim 1, also comprise:
Retaining wall portion, it is configured to the direction of the described air-flow that change is flowed out from described cooling fan and guides described air-flow towards the second heating component.
12. air compressors according to claim 11, wherein,
Described second heating component is the cylinder of described press part.
13. air compressors according to claim 12, also comprise:
Another cooling fan, it is arranged on another side of the described running shaft of described motor,
Wherein, described retaining wall cage structure is the side described air-flow flowed out from described cooling fan being guided to described cylinder, and the air-flow flowed out from another cooling fan described does not collide with the described side of described cylinder.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013193538A JP2015059504A (en) | 2013-09-18 | 2013-09-18 | Air compressor |
| JP2013-193538 | 2013-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104454460A true CN104454460A (en) | 2015-03-25 |
Family
ID=51357818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410422954.1A Pending CN104454460A (en) | 2013-09-18 | 2014-08-25 | Air compressor |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20150078938A1 (en) |
| EP (1) | EP2853745A1 (en) |
| JP (1) | JP2015059504A (en) |
| CN (1) | CN104454460A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007065A (en) * | 2019-12-20 | 2021-06-22 | Arb有限责任公司 | Air compressor for vehicle |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10125790B2 (en) * | 2014-07-24 | 2018-11-13 | Mahle International Gmbh | Centrifugal fan with reduced motor cooling noise |
| CN108397370A (en) * | 2017-05-04 | 2018-08-14 | 广东温博节能环保科技有限公司 | Heat sinking formula permanent-magnetic variable-frequency air compressor |
| CN110173418A (en) * | 2019-01-10 | 2019-08-27 | 苏州欧圣电气股份有限公司 | A kind of air pressure pump and air compressor machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009646A1 (en) * | 1996-06-28 | 2001-07-26 | Shawn Leu | Two-cylinder pump |
| US20080112823A1 (en) * | 2004-12-28 | 2008-05-15 | Tsutomu Yoshida | Air Compressor |
| EP2006540A2 (en) * | 2007-06-19 | 2008-12-24 | Schneider Druckluft GmbH | Compressor device with a tensioning device |
| US20090194177A1 (en) * | 2008-02-05 | 2009-08-06 | Hitachi Koki Co., Ltd. | Air compressor |
| JP4855788B2 (en) * | 2006-01-31 | 2012-01-18 | 株式会社日立産機システム | Reciprocating compressor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060171820A1 (en) * | 2005-01-31 | 2006-08-03 | Baron Michael P | Cooling arrangement for a portable air compressor |
| JP5293995B2 (en) * | 2008-02-05 | 2013-09-18 | 日立工機株式会社 | air compressor |
| JP5822181B2 (en) | 2011-08-18 | 2015-11-24 | 日立工機株式会社 | air compressor |
-
2013
- 2013-09-18 JP JP2013193538A patent/JP2015059504A/en active Pending
-
2014
- 2014-08-17 US US14/461,413 patent/US20150078938A1/en not_active Abandoned
- 2014-08-18 EP EP14181256.0A patent/EP2853745A1/en not_active Withdrawn
- 2014-08-25 CN CN201410422954.1A patent/CN104454460A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010009646A1 (en) * | 1996-06-28 | 2001-07-26 | Shawn Leu | Two-cylinder pump |
| US20080112823A1 (en) * | 2004-12-28 | 2008-05-15 | Tsutomu Yoshida | Air Compressor |
| JP4855788B2 (en) * | 2006-01-31 | 2012-01-18 | 株式会社日立産機システム | Reciprocating compressor |
| EP2006540A2 (en) * | 2007-06-19 | 2008-12-24 | Schneider Druckluft GmbH | Compressor device with a tensioning device |
| US20090194177A1 (en) * | 2008-02-05 | 2009-08-06 | Hitachi Koki Co., Ltd. | Air compressor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007065A (en) * | 2019-12-20 | 2021-06-22 | Arb有限责任公司 | Air compressor for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| US20150078938A1 (en) | 2015-03-19 |
| EP2853745A1 (en) | 2015-04-01 |
| JP2015059504A (en) | 2015-03-30 |
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Application publication date: 20150325 |