GB2452604A - Charging apparatus fan filter - Google Patents
Charging apparatus fan filter Download PDFInfo
- Publication number
- GB2452604A GB2452604A GB0815690A GB0815690A GB2452604A GB 2452604 A GB2452604 A GB 2452604A GB 0815690 A GB0815690 A GB 0815690A GB 0815690 A GB0815690 A GB 0815690A GB 2452604 A GB2452604 A GB 2452604A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- fan
- charging apparatus
- housing
- openings
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 239000002245 particle Substances 0.000 description 14
- 238000001816 cooling Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20181—Filters; Louvers
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Electrostatic Separation (AREA)
Abstract
Charging apparatus comprises a housing which has at least one bladed fan, an air inlet opening, and a filter 16 which is arranged at the air inlet opening and has a plurality of openings 17 which are at least half as large as the minimum spacing Smin of the fan blades 22. The ratio of the diagonal cross-section Omax of each filter opening 17 to the blade spacing Smin may be between 0.5 and 1.5, and may further be between 1 and 1.3. The filter 16 may be grid shaped, of unitary construction, and formed integrally with at least part of the housing. The filter 16 may also be coated to have a self-cleaning effect. The charging apparatus may be for a battery of an electric hand tool.
Description
-1 2452604
CHARGING APPARATUS WITH FILTERED COOLING FLOW
The present invention relates to charging apparatus, particularly for a battery pack.
Charging apparatus comprising a fan which blows, for example, cooling air into and through a coolable battery pack plugged into the apparatus are known from the state of the art. The reverse flow direction, in which the cooling air flows through an inlet opening into the battery pack and is sucked by the fan through the battery pack, is also known.
Moreover, charging apparatus are known in which the electronic components of the charging apparatus are cooled.
The housing of the charging apparatus has for this purpose air inlet and air outlet openings in order to suck in air from outside the housing and blow it out again. During the induction of air, dust and dirt particles are also sucked in which, according to their size, can damage the fan. In order to prevent dirt particles or the like penetrating into the fan housing, filters are usually provided at the air inlet openings. Very fine filters in the form of a fine net, tissue, mesh or the like of metal or other material are usually used as filters. This has the disadvantage that after a certain time the filters are blocked by dirt and dust particles and have to be cleaned or exchanged. Moreover, these fine filters have the disadvantage that they are thin and flexible.
According to the present invention there is provided charging apparatus comprising a housing, which has at least one fan with fan blades, an air inlet opening and a filter, which is arranged at the air inlet opening, with a plurality of openings, wherein the openings are at least half as large as the minimum spacing of the fan blades.
Charging apparatus embodying the invention includes a housing, which has at least one fan with fan blades, an air inlet opening and a filter with a plurality of openings, the filter being arranged at the air inlet opening. The charging apparatus is particularly suitable for a battery pack, especially a battery pack for an electric handtool. The fan serves for cooling the charging apparatus by conveying air from within to outside the charging apparatus. Cold air enters the interior of the charging apparatus via the air inlet opening.
The filter is of such a kind that the openings are at least as half as large as the minimum spacing of the fan blades. This has the advantage that the filter openings do not block up as quickly as conventional, very fine filters, since only coarser dirt particles, which are of
S
such a size that they could possibly damage the fan, remain caught at the filter. Finer dirt particles can pass through the filter openings and are centrifuged away by the fan blades so that the fan is not damaged notwithstanding the dirt and dust particles.
In a preferred embodiment the ratio of opening cross-section to fan blade spacing is at least 0.5 and at most 1.5, preferably at least 1 and at most 1.3, ideally 1.2. It is thereby possible to block only the dirt particles or the like which are too large for the fan, whereas other, smaller dirt particles are admitted by the filter and are blown through by the fan and out again. Consequently, the filter openings do not block up as quickly as with conventional filters. Since the filter openings are larger than usual filter openings, the filter can be constructed as a stable component. The filter is therefore more robust and cannot be damaged as easily as, for example, a filter consisting of a thin wire net or a fabric.
The filter is, for preference, grid-shaped or grill-shaped. By grid-shaped filter there is understood not only a filter in the form of a grid with rectangular filter openings, but also a filter with openings having, in principle, any geometric shape, for example, round, triangular, honeycomb, rectangular or lozenge-shaped. The respective maximum dimension of the opening is regarded as the opening cross-section. In the case of a rectangular opening this is, for example, the diagonal.
The filter is preferably of unitary construction. Thus, for example, the filter can be produced from plastics material by means of injection moulding or from metal by means of punching. Alternatively, however, the filter can be of two-part or multi-part construction, for example in that two filter elements with slot-shaped filter openings are arranged one above the other, the slot-shaped openings being perpendicular to one another so that a grid-shaped filter is formed.
The filter is preferably constructed integrally with at least a part of the housing. The housing or a housing part of the fan as well as the filter can, for example, be of plastics material. The ventilation grid can, for example, be formed integrally with the housing of the charging apparatus so that the housing and grid can be produced together in an injection moulding method. If the grid is moulded directly at the housing of the apparatus it does not have to be mounted on the housing in a separate production step, for example by screwing, gluing or clamping. Moreover, the integrally moulded filter has a sufficient inherent stability so that it does not have to be additionally stabilised, for example by means of a frame.
In a further embodiment of the invention the fiRer is coated in such a manner that it has a self-cleaning effect (lotus flower effect).
An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawings, in which: Fig. 1 is a perspective view of part of charging apparatus embodying the invention; Fig. 2 is a view of a fan and filter assembly incorporated in the apparatus of Fig. 1; Fig. 3a is a schematic illustration of fan blades of a fan of the assembly, showing the blade spacing; and Fig. 3b is a schematic illustration, to enlarged scale, of filter openings of a filter of the assembly, showing the filter opening maximum dimension.
Referring now to the drawings, part of charging apparatus 10 embodying the invention is illustrated in Fig. 1 in perspective view. The charging apparatus 10 is suitable for, for example, charging exchangeable battery packs for electric tools. The charging apparatus comprises a housing 12 which can be single-part or multi-part, for example can consist of a lower and an upper housing shell (not illustrated). The housing has a plug-in shaft for reception of a battery pack (not illustrated). Disposed in the region of the shaft 14 are contact elements 13 for electrical contact-making of the battery pack with the charging apparatus 10.
As can be inferred from the enlarged detail according to Fig. 2, a fan 20 in a fan housing 21 is provided in the interior of the apparatus 10 below the shaft 14. Air from outside enters the interior of the apparatus by way of an air inlet opening 15. The air is blown out via an air outlet opening (not illustrated) with the help of the fan 20.
In order to prevent dust, dirt and other particles penetrating into the apparatus 10 a filter 16 with a plurality of openings 17 is arranged at the air inlet opening 15. The filter 16 is in that case selected so that the openings 17 are at least half as large as the minimum spacing Smin of the fan blades 22. The minimum spacing Smin of the fan blades 22 is shown in Fig. 3a. By minimum fan blade spacing there is understood the minimum spacing between two adjacent fan blades 22. This is present at those ends of the adjacent blades 22 which face a rotational axle 23 of the fan 20. The cross-section °max of an opening 17, which in the case of a square opening 17 (as shown in, for example, Fig. 3b) corresponds with the diagonal, is regarded as the size of the opening 17. Analogous opening cross-sections are taken into account in other geometric shapes of openings 17. The ratio of opening cross-section °max to fan blade spacing Smin is at least 0.5 and at most 1.5, preferably at least 1 and at most 1.3, ideally 1.2. This has the advantage that the filter openings do not block as quickly as with conventional, very fine filters, since only coarser dirt particles are retained at the filter 16, whereas finer dirt particles can pass through the filter openings 17 and are centrifuged away by the fan blades 22. In the charging apparatus 10 the opening cross-section °max and the fan blade spacing Smin are matched to one another in such a manner that coarse dirt particles, which could damage the fan 20, are caught at the filter 16, whereagainst fine dirt particles, which cannot damage the fan 20, are let through by the filter 16. If a finer filter able to also catch finer dirt particles were to be used, the filter would block up to quickly and would have to be exchanged. The concept of the present invention consists in eschewing use of a fine filter, which also retains fine particles, and instead employing a coarser filter 16 which allows passage of fine particles which cannot damage the fan 20.
Claims (7)
1. Charging apparatus including a housing with a fan having a plurality of fan blades, an air inlet opening, and a filter arranged at the inlet opening, the filter having a plurality of openings each at least half as large as the minimum spacing of the blades.
2. Apparatus as claimed in claim 1, wherein the ratio of the cross-section of each filter opening to the blade spacing is at least 0.5 and at most 1.5.
3. Apparatus as claimed in claim 2, wherein the ratio is at least 1 and at most 1.3.
4. Apparatus as claimed in any one of the preceding claims, wherein the filter is grid-shaped.
5. Apparatus as claimed in any one of the preceding claims, wherein the filter is of unitary construction.
6. Apparatus as claimed in any one of the preceding claims, wherein the filter is formed integrally with at least a part of the housing.
7. Apparatus as claimed in any one of the preceding claims, wherein the filter is coated to have a self-cleaning effect.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007042399.5A DE102007042399B4 (en) | 2007-09-06 | 2007-09-06 | charger |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0815690D0 GB0815690D0 (en) | 2008-10-08 |
GB2452604A true GB2452604A (en) | 2009-03-11 |
GB2452604B GB2452604B (en) | 2009-10-28 |
Family
ID=39865892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0815690A Expired - Fee Related GB2452604B (en) | 2007-09-06 | 2008-08-28 | Electrical charging apparatus with filtered cooling flow |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN101383437A (en) |
DE (1) | DE102007042399B4 (en) |
GB (1) | GB2452604B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117096995A (en) * | 2023-10-18 | 2023-11-21 | 超耐斯(深圳)新能源集团有限公司 | Lithium battery charging equipment with over-temperature early warning function |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112514197A (en) | 2018-07-30 | 2021-03-16 | 米沃奇电动工具公司 | Battery charger |
CN210120406U (en) | 2018-10-17 | 2020-02-28 | 米沃奇电动工具公司 | Battery charger |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6074296A (en) * | 1998-05-21 | 2000-06-13 | Delta Electronics, Inc. | Case for power supply |
US6270313B1 (en) * | 1998-07-04 | 2001-08-07 | Delta Electronics, Inc. | Fan and airflow for cooling electronic device with reduced turbulence and noise and higher efficiency |
US20030202879A1 (en) * | 2002-04-30 | 2003-10-30 | Wen-Shi Huang | Cooling fan |
GB2405998A (en) * | 2003-08-22 | 2005-03-16 | Eric Tsai | Computer power supply |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5822186A (en) * | 1996-02-23 | 1998-10-13 | Apple Computer, Inc. | Auxiliary electrical component utilized on the exterior of an electrical device that can be removed when the electrical device is powered |
US6455186B1 (en) * | 1998-03-05 | 2002-09-24 | Black & Decker Inc. | Battery cooling system |
JP3527405B2 (en) * | 1998-03-18 | 2004-05-17 | 株式会社マキタ | Power tool charging system |
DE19819916A1 (en) * | 1998-05-05 | 1999-01-07 | Etl Verfahrenstechnik Gmbh | Filter material |
JP3762104B2 (en) * | 1998-07-02 | 2006-04-05 | 株式会社マキタ | Electric tool charging system |
JP3741359B2 (en) * | 1999-11-11 | 2006-02-01 | 株式会社マキタ | battery pack |
EP1381134B1 (en) * | 2002-07-12 | 2011-11-16 | HILTI Aktiengesellschaft | Battery charging station |
DE102004020147B4 (en) * | 2004-04-24 | 2007-11-22 | Metabowerke Gmbh | Arrangement comprising a charger and a battery pack |
JP2007088535A (en) * | 2005-09-20 | 2007-04-05 | Casio Hitachi Mobile Communications Co Ltd | Charging cradle and program |
JP4484801B2 (en) * | 2005-09-29 | 2010-06-16 | 三洋電機株式会社 | Charger |
JP4431896B2 (en) * | 2005-12-22 | 2010-03-17 | 国産電機株式会社 | Battery charge control device |
-
2007
- 2007-09-06 DE DE102007042399.5A patent/DE102007042399B4/en not_active Expired - Fee Related
-
2008
- 2008-08-28 GB GB0815690A patent/GB2452604B/en not_active Expired - Fee Related
- 2008-09-04 CN CNA2008102158796A patent/CN101383437A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6074296A (en) * | 1998-05-21 | 2000-06-13 | Delta Electronics, Inc. | Case for power supply |
US6270313B1 (en) * | 1998-07-04 | 2001-08-07 | Delta Electronics, Inc. | Fan and airflow for cooling electronic device with reduced turbulence and noise and higher efficiency |
US20030202879A1 (en) * | 2002-04-30 | 2003-10-30 | Wen-Shi Huang | Cooling fan |
GB2405998A (en) * | 2003-08-22 | 2005-03-16 | Eric Tsai | Computer power supply |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117096995A (en) * | 2023-10-18 | 2023-11-21 | 超耐斯(深圳)新能源集团有限公司 | Lithium battery charging equipment with over-temperature early warning function |
CN117096995B (en) * | 2023-10-18 | 2024-03-29 | 超耐斯(深圳)新能源集团有限公司 | Lithium battery charging equipment with over-temperature early warning function |
Also Published As
Publication number | Publication date |
---|---|
DE102007042399A1 (en) | 2009-03-12 |
GB0815690D0 (en) | 2008-10-08 |
DE102007042399B4 (en) | 2021-02-04 |
GB2452604B (en) | 2009-10-28 |
CN101383437A (en) | 2009-03-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR102484238B1 (en) | Portable air caring apparatus | |
EP2002752B1 (en) | A heat blower | |
GB2452604A (en) | Charging apparatus fan filter | |
CN105737351A (en) | Air outlet grid used for air purifier and air purifier | |
WO2015174084A1 (en) | Ventilation unit for vehicle air-conditioning device | |
US10591212B2 (en) | Device and method for drying grain | |
EP2865952B1 (en) | Air conditioner | |
JP6405524B2 (en) | Air conditioner | |
KR102054973B1 (en) | Air cleaner | |
CN207839565U (en) | A kind of cleaner | |
CN217867068U (en) | White corundum production is with fortune material device | |
CN110067759A (en) | Leaf air blower | |
CN1784167A (en) | Blow-out filter comprising a cover for conducting air | |
KR20080079149A (en) | Impinger | |
CN211158933U (en) | High-efficient filter dust collector | |
JP5879479B2 (en) | Air purifier and air purifier with humidification function | |
KR20090010837A (en) | Rotary filter for impinger | |
CN213959520U (en) | Heat dissipation machine case for circuit breaker | |
JP2010125391A (en) | Air cleaner | |
CN208025763U (en) | Purge module and air conditioner | |
CN205478399U (en) | Improved generation roof ventilation machine | |
CN215969573U (en) | Granule screening case and have multistage refrigerated PBT/PET aggregate sieving mechanism | |
KR100652802B1 (en) | Air conditioner | |
CN215011673U (en) | Grass collecting device and mower | |
JP2865326B2 (en) | Air conditioner |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20210828 |