EP2955382B1 - Structure de corps de piston de compresseur d'air - Google Patents

Structure de corps de piston de compresseur d'air Download PDF

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Publication number
EP2955382B1
EP2955382B1 EP13874617.7A EP13874617A EP2955382B1 EP 2955382 B1 EP2955382 B1 EP 2955382B1 EP 13874617 A EP13874617 A EP 13874617A EP 2955382 B1 EP2955382 B1 EP 2955382B1
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EP
European Patent Office
Prior art keywords
piston body
air
head
receiving space
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13874617.7A
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German (de)
English (en)
Other versions
EP2955382A4 (fr
EP2955382A1 (fr
Inventor
Wen-San Chou
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to PL13874617T priority Critical patent/PL2955382T3/pl
Priority to HUE13874617A priority patent/HUE040224T2/hu
Publication of EP2955382A1 publication Critical patent/EP2955382A1/fr
Publication of EP2955382A4 publication Critical patent/EP2955382A4/fr
Application granted granted Critical
Publication of EP2955382B1 publication Critical patent/EP2955382B1/fr
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Classifications

    • 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
    • F04B39/0005—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 adaptations of pistons
    • 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
    • F04B39/0005—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 adaptations of pistons
    • F04B39/0016—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 adaptations of pistons with valve arranged in the piston
    • 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
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
    • F04B39/042—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod sealing being provided on the piston

Definitions

  • the present invention relates to a piston body for an air compressor and, more particularly, to a piston body which defines an air receiving space to allow the pressure of the air supply of the air compressor to keep less than a safety pressure, so that the air compressor has no need to be installed with a mechanical safety valve; therefore, the manufacturing cost can be reduced.
  • Air compressors are equipment that can be used to inflate objects. Generally, they are widely applied in inflating air cushions and tires. Some air compressors are manufactured in small size, so that they can be carried easily. Furthermore, they can be powered by a handheld DC power supply or a cigarette lighter socket in a vehicle, so that they can be operated conveniently and easily. FIGS.
  • FIG. 14 through 16 show two conventional air compressors, which generally comprise a cylinder 81 (or cylinder 91), a piston body 82 (or piston body 92), a motor 93, and a transmission mechanism including a gear 94 and a pinion 95, wherein the motor 93 can drive the pinion 95 mounted at an output axle of the motor 93 to rotate the gear 94, which in turn can drive the piston body 82 (or piston body 92), through a crankpin 96, to conduct reciprocating motion in the cylinder 81 (or cylinder 91) for producing compressed air in the cylinder.
  • the compressed air can be transferred to an object desired to be inflated via an output 97 (see FIG. 16 ).
  • Another output 98 see also FIG.
  • the piston body 82 fitted in the cylinder 81 defines an intake channel 822 through its head 821.
  • the head 921 of the piston body 92 fitted in the cylinder 91 is a solid structure that does not contain an intake channel.
  • each of the air compressors has to be installed with a safety valve 84 (in FIG. 16 , the safety valve is not shown).
  • the safety valve 84 can be actuated to allow the compressed air to be released into the environment, so that the compressed air will not continue to flow into the object being inflated, thus guaranteeing the safety of the air compressor and the object.
  • an air compressor installed with a safety valve will increase the manufacturing cost and thus is not an economical design.
  • an extra safety valve which is indispensible and has to be installed on a conventional air compressor for limiting its output air pressure, increases the manufacturing cost.
  • the applicant has carefully investigated the operations of conventional air compressors and thus designed an air compressor that can achieve the effect of limiting air pressure without using a safety valve.
  • a piston body of a compressor whose head has a circular rim surrounding a recessed space. Opposite to the recessed space is a valve seat plate arranged within the cylinder of the compressor. When the piston body is on its top dead center the valve seat plate is positioned in the recessed space, such that the entire gas volume is pressed out of the cylinder via a discharge valve.
  • the publication of US patent US 5,655,887 A discloses a piston body the head of which comprises a base, a piston holder and a compressible conical piston. The piston holder and the compressible conical piston form together an annular edge protruding from the base and surrounding an air receiving space.
  • a piston body that has a head with axially extending ventilation passages leading to the top surface of the head.
  • the ventilation passages are sealed and opened during movement of the piston body by means of either an annular ring seal surrounding the head of the piston body or a valve flap being mounted on the top surface of the head.
  • the present invention offers a solution for an air compressor, which can provide safe compressed air to an object without using a mechanical safety valve.
  • the solution provided by the present invention is concerned with a piston body as follows:
  • the piston body can be applied for conducting a reciprocating motion in a cylinder of an air compressor and for producing compressed air.
  • the piston body comprises a head having a top surface which extends along a horizontal plane.
  • the head defines at least one air receiving space indented into the top surface of the head, wherein the at least one air receiving space is bounded by a bottom surface and a surrounding surface and having a top opening at the top surface of the head.
  • the piston body is characterised in that the head defines a plurality of air receiving spaces, which have different shapes and depths and do not communicate with each other. As such, without using a mechanical safety valve, the pressure of compressed air produced in the cylinder does not exceed a safety pressure set for an object to be inflated.
  • the piston body further comprises a rod.
  • the head forms a flat top flange at the periphery of the top opening of the at least one air receiving space, and forms a bottom flange below the top flange, and defines an annular groove at its outer surface, between the top flange and the bottom flange, wherein the annular groove does not communicate with the at least one air receiving space.
  • the bottom flange of the head is joined to a first end of the rod.
  • a second end of the rod defines a pivot hole.
  • An air-tight ring is fitted into the annular groove of the head.
  • the head may define an intake channel extending downwardly from the bottom surface and communicating with the at least one air receiving space.
  • the bottom surface is provided with a mounting post.
  • a resilient sheet is mounted on the mounting post provided on the bottom surface.
  • the pressure of the compressed air produced from the reciprocating motion of the piston body will not exceed a safety pressure set for an object to be inflated.
  • a mechanical safety valve to an air compressor employing the piston body of the present invention.
  • the air pressure in the object can keep less than a safety pressure thereof Therefore, the operational safety can be increased, and the manufacturing cost can be reduced.
  • a piston body 6 which generally comprises a head 61 and a rod 62 having a predetermined length.
  • the head 61 has a top surface which extends along a horizontal plane (XY), wherein the head 61 defines an air receiving space 60 indented into the top surface of the head 61.
  • the air receiving space 60 is bounded by a bottom surface 602 and a surrounding surface 603 and having a top opening 601 at the top surface of the head 61.
  • the head 61 of the piston body 6 forms a flat top flange 611 at the periphery of the top opening 601 of the air receiving space 60, and forms a bottom flange 612 below the top flange 611, and defines an annular groove 64 at its outer surface, between the top flange 611 and the bottom flange 612, wherein the annular groove 64 does not communicate with the air receiving space 60.
  • the bottom flange 612 of the head 61 is joined to a first end 621 of the rod 62.
  • a second end 622 of the rod 62 defines a pivot hole 63.
  • An air-tight ring 65 which functions as an O-ring, is fitted into the annular groove 64 of the head 61.
  • the piston body 6 can be applied in a compressor unit, the operation of which is shown in FIGS. 3 through 6 , and 10 , wherein the compressor unit 1 includes a main frame 10, a motor 11 mounted at the frame 10, a cylinder 2, and a transmission mechanism including a pinion 12 and a gear 13 engaged with the pinion 12.
  • the gear 13 is provided with a crankpin 15 connected with the pivot hole 63 defined at the second end 622 of the rod 62 of the piston body 6.
  • the cylinder 2 has a top wall 22, which serves as a top border of an inner space 21 of the cylinder 2.
  • the top wall 22 defines an air exit 23 communicating with an air storage container 3 on the cylinder 2.
  • the air storage container 3 is provided with a plurality of outlets 31, 32, 33.
  • a plug 34 is placed on the exit hole 23 defined on the top wall 22 of the cylinder 2.
  • a compression spring 36 is urged against the plug 34.
  • the outlet 31 is connected with a hose 41.
  • the outlet 32 is connected with a pressure gauge 42.
  • the outlet 33 is connected with a relief valve 5, which includes a soft cap 51 provided at an innermost end thereof.
  • the compressor unit 1 can be installed in a box 4 which is provided with a switch 45 for starting or stopping the compressor unit.
  • the pressure gauge 42 installed at the compressor unit 1 can be exposed to the outside.
  • the box 4 is provided with a button 46, which has a push bar 461 inserted through a mounting bolt 52 to touch the soft cap 51 of the relief valve 5.
  • FIGS. 3 and 4 show external appearances of the box 4 which accommodates the compressor unit 1.
  • FIG. 9 shows an internal state of the box 4 which accommodates the compressor unit 1.
  • FIGS. 5 and 6 show two operational states of a first embodiment of an air compressor.
  • the piston body 6 conducts reciprocating motion in the cylinder 2.
  • An upward stroke of the piston body 6 can force the air contained in the inner space 21 of the cylinder 2 to enter the inner space 35 of the air storage container 3 (see FIG. 6 ), and then flow into an object to be inflated via the hose 41 connected to the outlet 31.
  • a downward stroke of the piston body 6 allows outside air to enter the inner space 21 of the cylinder 2 via the gap between the piston body 6 and the inner surface 24 of the cylinder 2 (see FIG. 5 ). As such, repeated upward and downward strokes of the piston body 6 will have the object fully inflated.
  • the air receiving space 60 Due to the air receiving space 60 defined at the head 61 of the piston body 6, when the piston body 6 has conducted an upward stroke to reach top dead center, although the top flange 611 almost contacts the top wall 22 of the cylinder 2, the air receiving space 60 can store additional compressed air produced in the inner space 21 of the cylinder 2.
  • This design can reduce the motion resistance of the piston body 6, so that the piston body 6 can conduct reciprocating motion more smoothly.
  • the air pressure in the object can keep less than a safety pressure, so that the operational safety can be ensured.
  • a mechanical safety valve to an air compressor which employs the piston body 6.
  • the piston body 6 can be applied to a second embodiment of the air compressor, in which the cylinder 2 is provided with an air inlet 26 and a resilient sheet 27 (see FIG. 7 ).
  • the resilient sheet 27 can close the inlet 26 (see FIG. 8 ).
  • outside air can move the resilient sheet 27 to be pivotally away from the air inlet 26, so that outside air may enter the inner space 21 of the cylinder 2, as shown in FIG. 7 .
  • the piston body 6 can achieve the same effect as the first embodiment of the air compressor.
  • FIGS. 12 and 13 show a second embodiment of the piston body, wherein the head 61 defines an intake channel 66 extending downwardly from the bottom surface 602 and communicating with the air receiving space 60.
  • the bottom surface 602 is provided with a mounting post 67.
  • a resilient sheet 68 is mounted on the mounting post 67 provided on the bottom surface_602.
  • the head 61 of the piston body 6 may define a plurality of air receiving spaces (P1, P2, P3), which have different shapes and depths and do not communicate with each other.
  • the piston body 6 of the present invention defines at least one air receiving space 60 at its head 61, so that an air compressor employing the piston body 6 has no need to be installed with a mechanical safety valve. Therefore, the manufacturing cost of the air compressor can be reduced, and the piston body 6 can conduct reciprocating motion more smoothly and safely.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)

Claims (3)

  1. Corps de piston pour conduire un mouvement alternatif dans un cylindre (2) d'un compresseur à air et pour produire de l'air comprimé, le corps de piston comprenant une tête (61) ayant une surface de dessus qui s'étend le long d'un plan horizontal (XY), la tête (61) définissant au moins un espace qui reçoit de l'air (60) dentelé dans la surface de dessus de la tête (61), l'espace qui reçoit de l'air (60) étant délimité par une surface de fond (602) et une surface périphérique (603) et ayant une couverture de dessus (601) sur la surface de dessus de la tête (61), caractérisé en ce que
    la tête (61) définit une pluralité d'espaces qui reçoivent de l'air (P1, P2, P3) qui ont différentes formes et profondeurs et qui ne communiquent pas l'un avec l'autre.
  2. Corps de piston selon la revendication 1 comprenant de plus une tige (62) et la tête (61) formant une bride de dessus plate (611) à la périphérie de l'ouverture de dessus (601) de l'espace qui reçoit de l'air qui existe au moins (60) et formant une bride de fond (612) en dessous de la bride de dessus (611) et définissant une rainure annulaire (64) sur sa surface extérieure entre la bride de dessus (611) et la bride de fond (612), la rainure annulaire (64) ne communiquant pas avec l'espace qui reçoit de l'air qui existe au moins (60), la bride de fond (612) de la tête (61) étant reliée à une première extrémité (621) de la tige (62), une seconde extrémité (622) de la tige (62) définissant un trou de pivot (63), un anneau étanche à l'air (65) étant ajusté dans la rainure annulaire (64) de la tête (61).
  3. Corps de piston selon la revendication 1, la tête (61) définissant un canal d'admission (66) qui s'étend vers le bas à partir de la surface de fond (602) et qui communique avec l'espace qui reçoit de l'air qui existe au moins (60), la surface de fond (602) étant pourvue d'un tenon de montage (67), une feuille élastique (68) étant montée sur le tenon de montage (67) prévu sur la surface de fond (602), cependant que des courses vers le haut du corps de piston font en sorte que la feuille élastique (68) ferme le canal d'admission (66) tandis que des courses vers le bas du corps de piston feront en sorte que la feuille élastique (68) s'éloigne par pivotement de la surface de fond (602) par de l'air extérieur.
EP13874617.7A 2013-02-07 2013-02-07 Structure de corps de piston de compresseur d'air Active EP2955382B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL13874617T PL2955382T3 (pl) 2013-02-07 2013-02-07 Konstrukcja korpusu tłoka sprężarki powietrza
HUE13874617A HUE040224T2 (hu) 2013-02-07 2013-02-07 Légkompresszor dugattyútest konstrukciója

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/071530 WO2014121495A1 (fr) 2013-02-07 2013-02-07 Structure de corps de piston de compresseur d'air

Publications (3)

Publication Number Publication Date
EP2955382A1 EP2955382A1 (fr) 2015-12-16
EP2955382A4 EP2955382A4 (fr) 2016-09-07
EP2955382B1 true EP2955382B1 (fr) 2018-06-27

Family

ID=51299202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13874617.7A Active EP2955382B1 (fr) 2013-02-07 2013-02-07 Structure de corps de piston de compresseur d'air

Country Status (8)

Country Link
EP (1) EP2955382B1 (fr)
JP (1) JP6067143B2 (fr)
KR (1) KR20150109343A (fr)
CN (1) CN104956084A (fr)
DK (1) DK2955382T3 (fr)
HU (1) HUE040224T2 (fr)
PL (1) PL2955382T3 (fr)
WO (1) WO2014121495A1 (fr)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB145864A (en) * 1919-03-31 1920-06-30 Morris Henry Petigor Improvements in and relating to dispensing pumps
ES268273A1 (es) * 1961-06-15 1961-10-01 Gemez Martinez Martin Mejoras en compresores
JPS56145683U (fr) * 1980-03-05 1981-11-02
JPH0219598Y2 (fr) * 1987-05-30 1990-05-30
US5266015A (en) * 1992-02-13 1993-11-30 Tecumseh Products Company Compressor suction and discharge valve assembly
US5655887A (en) * 1996-09-11 1997-08-12 Chou; Wen-San Valved Piston arrangement for an electric motor driven air compressor
US6213725B1 (en) * 1998-03-30 2001-04-10 Wen San Chou Compressor having an improved piston
JP2004190625A (ja) * 2002-12-13 2004-07-08 Bunsan Shu 空気圧縮機用ピストン
AU2006215624A1 (en) * 2005-02-16 2006-08-24 Basf Aktiengesellschaft 5-alkoxyalkyl-6-alkyl-7-amino-azolopyrimidines, method for their production, their use for controlling pathogenic fungi and agents containing said substances
US20080237510A1 (en) * 2005-08-16 2008-10-02 Wen San Chou Valve device for air compressor
US20070264141A1 (en) * 2006-05-09 2007-11-15 Chou Wen S Air compressor having improved valve device
CN101240784B (zh) * 2007-02-05 2010-05-19 周文三 空气压缩机的活塞体构造
CN101429935B (zh) * 2007-11-07 2012-03-07 周文三 空气压缩机的活塞体结构
DE102008061311A1 (de) * 2008-12-11 2010-06-24 Doukas Ag Vorrichtung zum Fördern eines Gases

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2955382A4 (fr) 2016-09-07
KR20150109343A (ko) 2015-10-01
JP6067143B2 (ja) 2017-01-25
CN104956084A (zh) 2015-09-30
JP2016505113A (ja) 2016-02-18
HUE040224T2 (hu) 2019-03-28
EP2955382A1 (fr) 2015-12-16
PL2955382T3 (pl) 2019-04-30
WO2014121495A1 (fr) 2014-08-14
DK2955382T3 (en) 2018-10-08

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